CN106283953B - Medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail beam transition section structure - Google Patents
Medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail beam transition section structure Download PDFInfo
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- CN106283953B CN106283953B CN201610826167.2A CN201610826167A CN106283953B CN 106283953 B CN106283953 B CN 106283953B CN 201610826167 A CN201610826167 A CN 201610826167A CN 106283953 B CN106283953 B CN 106283953B
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- rail beam
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/08—Deep or vertical foundation
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Abstract
Line technology field is put the invention belongs to middle low speed magnetic suspension traffic engineering is low, and disclose medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail beam transition section structure, roadbed filling, support rail beam both sides backfill filler, bridge abutment, trapezoidal filling body and headwall, the first pile foundation bearing structure under first pile foundation bearing structure, pile foundation joist composite bearing structure, armored concrete support rail beam bottom plate, two placing of reinforcement concrete beam-type structures, support rail beam are provided with more；Accept the reinforced concrete beam type structure in the top of armored concrete support rail beam bottom plate；Support rail beam both sides backfill filler is accepted by roadbed filling under the support rail beam.Long-time stability of the present invention are more preferable, both the high request to the deformation of support rail girder construction and settlement after construction had been met, meet the requirement of the controllability of bedding long-time stability, durability and construction quality again, effectively realize magnetic suspension elevated structure and the low smoothly transition for putting line transition section F rails.
Description
Technical field
Line technology field is put the invention belongs to middle low speed magnetic suspension traffic engineering is low, more particularly, to middle low speed magnetic
Floating two-wire embankment location support rail beam transition section structure pattern.
Background technology
Middle low speed magnetic suspension track traffic belongs to a kind of novel traffic mode, and achievement in research both domestic and external is less, the whole world
The circuit for opening operation is even more minority.The middle low speed magnetic suspension railway business that only in March, 2005, Japan's construction was opened at present is transported
The middle low speed magnetic suspension railway business operating line that line-the East Hillside Line and in June, 2014, South Korea opened.And the middle low speed of China
Magnetic suspension traffic only has National University of Defense technology's test wire, Green City Mountain test wire, Tangshan experiment line at present, but do not put into effect
Formal circuit, and based on elevated structure, it is rarely seen about elevated structure and the low research put in terms of line transition segment structure with
Using.
In wheel rail high speed railway, substantial amounts of bridge changeover portion roadbed be present, high-speed railway changeover portion roadbed uses mostly
Trapezium structure, cement stabilized graded macabam is employed in trapezoidal scope and is filled, and employ the compacting higher than non-changeover portion roadbed
It is required that.During built high-speed railway operation, bridge transition segment limit, non-fragment orbit protuberance, gap, grout often occurs
Etc. disease.The reason for this disease, it is due to that changeover portion roadbed is still earth structure by rock and soil constitution mostly, changeover portion
It after roadbed is laid a railway track, still can occur necessarily to settle, poor (the specification permission settlement after construction of certain settlement after construction be present with bridge abutment
Difference is not more than 5mm), because high-speed railway uses seamless track steel rail, allow in specification within the scope of settlement after construction difference, have no effect on
Normal operation, but the diseases such as non-fragment orbit protuberance, gap, grout can be caused, it is necessary to timely repair and maintenance.
The F rails of medium-and low-speed maglev traffic lines are to be spliced by a short rail successively using fishplate bar scene, and are left between rail
Seam, meet the ride comfort of the F rails of magnetic-levitation train even running requirement, to lean on works under rail to ensure substantially.It is low to put circuit location,
Basis is the earth structure by rock and soil constitution under support rail beam, is influenceed by factors such as landform, geological conditions, and quality is not relatively easily-controllable
System, differential settlement is also easy to produce under load and the effect of various factor of natural environment, can be occurred unavoidably and elevated structure bridge bridge
The inconsistent settlement after construction of platform, generation settlement after construction is poor, and low circuit of putting differential settlement occurs with bridge abutment position, necessarily affects
The ride comfort of F rails, in some instances it may even be possible to the problems such as causing F rails generation faulting of slab ends, deform, when serious, the normal fortune of maglev vehicle will be influenceed
Battalion.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides medium-and low-speed maglev two-wire embankment location to answer
Box-like support rail beam transition section structure, the structure should meet elevated structure and the low rigidity put between circuit and sedimentation transition, protect
Magnetic suspension traffic engineering elevated structure and the low ride comfort requirement for putting line transition section F rails are demonstrate,proved, meets magnetic floating traffic engineering again
The low intensity for putting line transition section sub-rail foundation, long-time stability requirement, and construction quality controllability is strong.
To achieve the above object, it is proposed, according to the invention, provide medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail
Beam transition section structure, it is characterised in that including the first pile foundation bearing structure, pile foundation joist composite bearing structure, armored concrete
Roadbed filling, support rail beam both sides backfill filler, bridge bridge under support rail beam bottom plate, two placing of reinforcement concrete beam-type structures, support rail beam
Platform, trapezoidal filling body and headwall, wherein,
The first pile foundation bearing structure and the pile foundation joist composite bearing structure accept the armored concrete jointly
Support rail beam bottom plate；
The first pile foundation bearing structure is provided with more, and the every first pile foundation bearing structure is vertically arranged, and
And the armored concrete support rail beam bottom plate is accepted on the top of the every first pile foundation bearing structure, first pile foundation is held
The top for carrying structure is embedded in the armored concrete support rail beam bottom plate and its rigid connection；
Reinforced concrete beam type structure described in two rows is accepted at the top of the armored concrete support rail beam bottom plate, and adjacent
Internode expansion joint is set between the two section armored concrete support rail beam bottom plates；
The pile foundation joist composite bearing structure setting has the armored concrete support rail beam of multiple and adjacent two pieces
A pile foundation joist composite bearing structure is respectively provided with the internode expansion joint of bottom plate, for supporting described in this two adjacent section
Armored concrete support rail beam bottom plate, each pile foundation joist composite bearing structure include reinforced concrete supporting beam and second
Base bearing structure, and the reinforced concrete supporting beam, the steel are accepted in the top of the every second pile foundation bearing structure
Reinforced concrete joist accepts the armored concrete support rail beam bottom plate；
The top of the second pile foundation bearing structure is embedded in the reinforced concrete supporting beam and its rigid connection, the reinforced concrete
Native joist and the armored concrete support rail beam bottom plate rigid connection or overlap joint, the armored concrete support rail beam bottom plate and the reinforcing bar
Concrete beam-type structural integrity pouring molding is so as to collectively forming armored concrete support rail beam；
The reinforced concrete supporting beam both sides are provided with for limiting the armored concrete support rail beam bottom plate lateral displacement
Convex block machine；
Wired weathering section be set between reinforced concrete beam type structure described in two rows, and weathering section has between the line
Cross fall and head fall, enter for current to be introduced to the internode expansion joint of two adjacent sections armored concrete support rail beam bottom plate
And current are discharged；
Roadbed filling is arranged between shallow layer reinforcement area and the armored concrete support rail beam bottom plate under the support rail beam, with
It is flat for providing construction for the armored concrete support rail beam bottom plate, reinforced concrete supporting beam and support rail beam both sides backfill filler
Platform, and provide lateral support for the pile foundation bearing structure；Wherein, the shallow layer reinforcement area is arranged on the superficial of soft stratum
Layer, and roadbed filling and the vertical consistency of the reinforced concrete beam type structure under the shallow layer reinforcement area, the support rail beam；
The support rail beam both sides backfill filler is accepted by roadbed filling under the support rail beam, and the support rail beam both sides
Backfill filler props up the both sides of the armored concrete support rail beam bottom plate, to play protection to the armored concrete support rail beam bottom plate
The transverse shifting of the armored concrete support rail beam bottom plate is acted on and constrained, and maintenance passage is provided；
Roadbed filling and support rail beam both sides backfill filler collectively form filler filling body under the support rail beam, described to fill out
Material filling body both sides are provided with the first weathering；
The lower end of the every first pile foundation bearing structure sequentially passes through roadbed filling, the shallow-layer under the support rail beam and added
Stretched into after Gu Qu and the soft stratum in supporting course, with soft stratum produce sedimentation when, the first pile foundation bearing structure
Negative friction can be born, so as to provide stable carrying to armored concrete support rail beam bottom plate and reinforced concrete beam type structure
Power, to reduce because the sedimentation of filler filling body is to unfavorable caused by the vertical of armored concrete support rail beam, vertical and horizontal rigidity
Influence；
One end of the armored concrete support rail beam bottom plate is overlapped on the bridge abutment, and both are connected by pin
Release longitudinal restraint is connect, and limits lateral displacement；
The both sides of one end that the armored concrete support rail beam bottom plate is overlapped on the bridge abutment set the end respectively
Wall, and the headwall per side is abutted with the support rail beam both sides backfill filler of respective side respectively, and the support rail is protected for gear
Beam both sides backfill filler；
The trapezoidal filling body is arranged between shallow layer reinforcement area and the armored concrete support rail beam bottom plate, its with it is described
Roadbed filling abuts close to one end of the bridge abutment under support rail beam, for accepting the armored concrete support rail beam bottom
Plate, support rail beam both sides backfill filler and headwall；
The trapezoidal filling body both sides are provided with second weathering consistent with the first weathering gradient.
Preferably, the first pile foundation bearing structure is cast-in-situ bored pile, and reinforced concrete supporting beam is held with armored concrete
Beam-and-rail bottom plate rigid connection or overlap joint, with the second pile foundation bearing structure rigid connection.
Preferably, in the position at the internode expansion joint of armored concrete support rail beam, reinforced concrete supporting beam and reinforced concrete
Native support rail beam bottom plate is overlapped using pin, and remaining position uses rigid connection.
Preferably, the height and the height phase of the armored concrete support rail beam bottom plate of the support rail beam both sides backfill filler
Deng.
Preferably, all these described first pile foundation bearing structures are arranged in ranks.
Preferably, the trapezoidal filling body mixes cement production systD using graded broken stone.
Preferably, the armored concrete support rail beam bottom plate is overlapped on one end of the bridge abutment and the bridge abutment
Between be provided with wear-resisting sliding layer.
Preferably, the pin includes pre-buried connection reinforcing bar, pitch hemp cut and stainless steel sleeve pipe, the pre-buried connection reinforcing bar
The pitch hemp cut is set in the stainless steel sleeve pipe and between the two.
Preferably, the cross fall of weathering section is 3%~5% between the line, and head fall is not less than 2 ‰.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
(1) armored concrete support rail beam bottom plate of the invention, reinforced concrete beam type structure are showed using armored concrete
Field one-piece casting, the two forms integral reinforced concrete structure to directly take on the magnetic-levitation train of track load and track transmission
Load, then deadweight and upper load are passed to and its rigidly connected first pile foundation bearing structure, structural reliability height.
(2) the first pile foundation bearing structure of the invention is goed deep into supporting course, and when embankment produces certain sedimentation, the first pile foundation is held
Can still negative friction be born and provide stronger bearing capacity by carrying structure, be avoided caused by filling compaction quality is whard to control
Vertical to support rail beam, vertical and horizontal rigidity influence is settled, structure vertical cross stiffness and structural reliability are more excellent.
(3) circuit soft soil zone is put low, needs the superficial layer progress to soft stratum necessary according to embankment stability
Reinforcing, its reinforcement depth controls by embankment stability, and tradition during compared to by settling and stablize Two indices control is solely
For base reinforcing mode, shallow layer reinforcement area reinforcement depth is small, with reference to the first pile foundation bearing structure can effectively control roadbed reclamation and
Post-construction settlement of subgrade.Non- soft soil zone can be more avoided after embankment slope at the foundation stabilization of caused wide area
Reason, and the first pile foundation bearing structure construction quality is more easy to control, can effectively control construction quality, investment reduction, shorten the duration, tool
There are obvious technology and economic advantages.
(4) reinforced concrete supporting beam that pile foundation bearing structure and armored concrete support rail beam bottom plate are set, can subtract significantly
The stress concentration phenomenon of armored concrete support rail beam bottom plate at small pile foundation bearing structure；Further, since reinforced concrete supporting beam
Lateral connection acts on, and also increases the lateral stiffness of structure and the ability of resistance differential settlement deformation, can reduce transverse pile foundation
Quantity, reduce investment.
(5) while by two placing of reinforcement concrete beam-type structures of two-wire by armored concrete support rail beam floor combination one
Rise, the lateral stiffness of reinforced concrete beam type structure can be effectively increased, left and right two is saved reinforced concrete beam type structure and be placed in
On rigidity identical armored concrete support rail beam bottom plate, the lateral stability of reinforced concrete beam type structure can be effectively increased,
The relative settlement between reinforced concrete beam type structure is controlled, is also beneficial to maintenance and maintenance during operation, measure is simple, easily applies
Work, cost save, effect is good.
(6) adjacent armored concrete support rail beam bottom plate shares pile foundation joist composite bearing structure, and in adjacent steel
Internode expansion joint is reserved between reinforced concrete support rail beam bottom plate, impact failure of the section by train load of encorbelmenting can be avoided, and reduce
The influence of temperature stress and shrinkage and creep.
(7) armored concrete support rail beam bottom plate is overlapped on bridge abutment close to one end of elevated bridge, passes through pin
Connection, avoid and settle faulting of slab ends caused by measures of foundation treatment difference between the two, it is ensured that magnetic float F rails it is low put circuit with
Bridge abutment connected position will not produce faulting of slab ends, effectively realize that magnetic suspension traffic engineering elevated structure puts line transition section F with low
The smoothly transition of rail.
Brief description of the drawings
Fig. 1 is the schematic longitudinal section of the present invention；
Fig. 2 is along the diagrammatic cross-section of I-I line in Fig. 1；
Fig. 3 is along the diagrammatic cross-section of II-II line in Fig. 1；
Fig. 4 is along the diagrammatic cross-section of III-III line in Fig. 1；
Fig. 5 is that armored concrete support rail beam bottom plate is overlapped on the floor map on bridge abutment in the present invention；
Fig. 6 is pile foundation joist of the present invention and armored concrete support rail beam bottom plate rigid connection connection diagram.
Fig. 7 is pile foundation joist of the present invention and armored concrete support rail beam bottom plate overlap joint connection diagram.
Fig. 8 is the cross-sectional view of pin in the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
1~Fig. 8 of reference picture, medium-and low-speed maglev two-wire embankment ground stage composite support rail beam transition section structure, including first
Roadbed filling 5 and support rail under base bearing structure 3, armored concrete support rail beam bottom plate 2, reinforced concrete beam type structure 1, support rail beam
Beam both sides backfill filler 4, wherein,
The first pile foundation bearing structure 3 and the pile foundation joist composite bearing structure 90 accept the reinforced concrete jointly
Native support rail beam bottom plate 2；
The first pile foundation bearing structure 3 is provided with more, and the every first pile foundation bearing structure 3 is vertically arranged,
And the armored concrete support rail beam bottom plate 2 is accepted on the top of the every first pile foundation bearing structure 3, described first
The top of base bearing structure 3 is embedded in the armored concrete support rail beam bottom plate 2 and its rigid connection；
Accept reinforced concrete beam type structure 1 described in two rows, and phase in the top of the armored concrete support rail beam bottom plate 2
Internode expansion joint is reserved between the section of the neighbour two armored concrete support rail beam bottom plate 2；
The pile foundation joist composite bearing structure 90 is provided with the two multiple and adjacent section armored concrete support rails
A pile foundation joist composite bearing structure 90 is respectively provided with the internode expansion joint of beam bottom plate 2, for support this adjacent two
The armored concrete support rail beam bottom plate 2 is saved, each pile foundation joist composite bearing structure 90 includes armored concrete support
The pile foundation bearing structure 902 of beam 901 and second, and the steel is accepted on the top of the every second pile foundation bearing structure 902
Reinforced concrete joist 901, the reinforced concrete supporting beam 901 accept the armored concrete support rail beam bottom plate 2；
The top of the second pile foundation bearing structure 902 is embedded in the reinforced concrete supporting beam 901 and its rigid connection, the steel
Reinforced concrete joist 901 and the rigid connection of armored concrete support rail beam bottom plate 2 or overlap joint, the armored concrete support rail beam bottom plate
2 are molded with the formed by integrally casting of reinforced concrete beam type structure 1 so as to collectively form armored concrete support rail beam 9；
The both sides of reinforced concrete supporting beam 901 are provided with for limiting the armored concrete support rail beam bottom plate 2 laterally
The convex block machine of displacement；
Wired weathering section be set between reinforced concrete beam type structure 1 described in two rows, and weathering section has between the line
There are cross fall and head fall, stretched for current to be introduced to the internode of two adjacent sections armored concrete support rail beam bottom plate 2
Stitch and then discharge current；The cross fall of weathering section is 3%~5%, more preferably 4% between the line, weathering between line
The head fall of section is not less than 2 ‰, in order to draining.
Under the support rail beam roadbed filling 5 be arranged on shallow layer reinforcement area 6 and the armored concrete support rail beam bottom plate 2 it
Between, carried for backfilling filler 4 for the armored concrete support rail beam bottom plate 2, reinforced concrete supporting beam 901 and support rail beam both sides
Lateral support is provided for construction platform, and for the pile foundation bearing structure 3；Wherein, the shallow layer reinforcement area 6 is arranged on flabbily
The superficial layer of layer 7, and roadbed filling 5 and the reinforced concrete beam type structure under the shallow layer reinforcement area 6, the support rail beam
1 vertical consistency；
The support rail beam both sides backfill filler is accepted by roadbed filling under the support rail beam, and the support rail beam both sides
Backfill filler props up the both sides of the armored concrete support rail beam bottom plate 2, to play guarantor to the armored concrete support rail beam bottom plate 2
Shield acts on and constrained the transverse shifting of the armored concrete support rail beam bottom plate 2, and provides maintenance passage；
Roadbed filling 5 and support rail beam both sides backfill filler 4 collectively form filler filling body 10, institute under the support rail beam
State the both sides of filler filling body 10 and be provided with the first weathering 11；
The lower end of the every first pile foundation bearing structure 3 sequentially passes through roadbed filling 5, the shallow-layer under the support rail beam
Stretched into after stabilization zone 6 and the soft stratum 7 in supporting course 8, so that when soft stratum 7 produces sedimentation, first pile foundation is held
Negative friction can be born by carrying structure 3, so as to be provided surely to armored concrete support rail beam bottom plate 2 and reinforced concrete beam type structure 1
Fixed bearing capacity, to reduce the sedimentation because of filler filling body 10 to vertical, the vertical and horizontal rigidity of armored concrete support rail beam 9
Caused adverse effect；
One end of the armored concrete support rail beam bottom plate 2 is overlapped on the bridge abutment 12, and both pass through pin
15 Connection Release longitudinal restraints are followed closely, and limit lateral displacement；
The both sides of one end that the armored concrete support rail beam bottom plate 2 is overlapped on the bridge abutment 12 set described respectively
Headwall 13, and the headwall 13 per side is abutted with the support rail beam both sides backfill filler 4 of respective side respectively, and institute is protected for gear
State support rail beam both sides backfill filler 4；
The trapezoidal filling body 14 is arranged between shallow layer reinforcement area 6 and the armored concrete support rail beam bottom plate 2, its with
Roadbed filling 5 abuts close to one end of the bridge abutment 12 under the support rail beam, is held for accepting the armored concrete
Beam-and-rail bottom plate 2, support rail beam both sides backfill filler 4 and headwall 13；
The both sides of trapezoidal filling body 14 are provided with second weathering 17 consistent with the gradient of the first weathering 11.
Further, the first pile foundation bearing structure 3 is cast-in-situ bored pile, reinforced concrete supporting beam 901 and reinforced concrete
The native rigid connection of support rail beam bottom plate 2 or overlap joint, with the rigid connection of the second pile foundation bearing structure 902.Stretched in the internode of armored concrete support rail beam
The position of contracting seam is overlapped using pin 15, and remaining position uses rigid connection.
The height of the support rail beam both sides backfill filler 4 is equal with the height of the armored concrete support rail beam bottom plate 2, institute
These the described first pile foundation bearing structures 3 having are arranged in ranks.
Further, the trapezoidal filling body 14 mixes cement production systD, the armored concrete support rail beam bottom using graded broken stone
Plate 2, which is overlapped between one end of the bridge abutment 12 and the bridge abutment 12, is provided with wear-resisting sliding layer 16, the pin
15 include pre-buried connection reinforcing bar 15.1, pitch hemp cut 15.2 and stainless steel sleeve pipe 15.3, and the pre-buried connection reinforcing bar 15.1 is located at
The pitch hemp cut 15.2 is fixedly installed in the stainless steel sleeve pipe 15.3 and between the two.
The low circuit of putting of low speed magnetic suspension traffic engineering is tight to post-construction settlement of subgrade requirement during the structural shape can be solved effectively
Lattice, take traditional foundation stabilization measure caused by engineering is huge, investment is big, long in time limit, and basement process and embankment
Construction quality is whard to control, bedding long-time stability and the problem of poor durability, so as to improve low circuit support rail girder construction of putting
Reliability, reduce the engineering risk of traditional structure pattern.
The agent structure of armored concrete support rail beam 9 of the present invention uses reinforced concrete soil scene one-piece casting, reinforced concrete
The native girder structure of support rail beam 9, then will deadweight and top directly taking on the magnetic-levitation train load of track load and track transmission
Load passes to high with its rigidly connected pile foundation bearing structure 3, structural reliability.Pile foundation bearing structure 3 uses reinforced concrete
Earth boring auger hole pouring pile is made, and transverse direction and longitudinal direction is made up of multiple rows of reinforced concrete bored pile, and vertical cross stiffness is big；And pile foundation
Go deep into reliable supporting course 8, when generation is come to nothing between the certain sedimentation of embankment generation and armored concrete support rail beam 9, pile foundation carrying is tied
Structure 3 can still bear negative friction and provide stronger bearing capacity, have stronger longitudinal, vertical and lateral stability.Two lines
Reinforced concrete beam type structure is connected by sharing armored concrete support rail beam bottom plate 2, further increases the laterally firm of structure
Degree and stability.
One end of armored concrete support rail beam bottom plate 2 of armored concrete support rail beam 9 is overlapped on bridge abutment 12, and the two is logical
Cross pin 15 to connect, the releasable temperature stress in the longitudinal direction of pin 15, realize support rail beam stretching in longitudinal direction, laterally limit support rail beam
Displacement, improve the lateral stability of structure.One end of support rail beam overlaps with bridge abutment 12, makes low to put circuit support rail beam and bridge
The sedimentation of the lap position of abutment 12 is consistent, avoids bridge abutment 12 and low generation faulting of slab ends sedimentation between putting circuit support rail girder construction；It is low
Put the other end of circuit armored concrete support rail beam bottom plate 2 be embedded in it is stable it is low put in line construction, it is settled puts circuit with low
Structure is consistent, due to it is low put line construction through basement process and fill compacting after sedimentation value be in controlled range, therefore, support rail
Sedimentation between beam both ends be located at bridge abutment 12 and it is low put line construction between, close to linear change, it is achieved thereby that overhead
Bridge structure and the low sedimentation transition put between line construction, it also avoid faulting of slab ends, the smooth-going of transition segment limit F rails have been effectively ensured
Property.
Wear-resisting sliding layer 16 is arranged between armored concrete support rail beam bottom plate 2 and bridge abutment 12, passes through resistance to mill sliding
The effect of layer 16, can release the rotation that support rail beam is likely to occur under the load actions such as relative settlement, temperature to a certain extent
Constraint, and the dynamic stress that bridge abutment 12 is transferred to magnetic-levitation train plays cushioning effect, it also avoid support rail beam and bridge abutment
Abrasion and stress concentration between 12 cause the partial pressing of structure to destroy.
Adjacent armored concrete support rail beam bottom plate 2 shares pile foundation joist composite bearing structure, and in adjacent reinforcing bar
Internode expansion joint is reserved between concrete support rail beam bottom plate 2, impact failure of the section by train load of encorbelmenting can be avoided, and reduce temperature
Spend the influence of stress and shrinkage and creep.
The reinforced concrete supporting beam 901 that second pile foundation bearing structure 902 and armored concrete support rail beam bottom plate 2 are set, can
To greatly reduce the stress concentration phenomenon of armored concrete support rail beam bottom plate 2 at pile foundation bearing structure；Further, since reinforced concrete
The lateral connection effect of native joist 901, the lateral stiffness of structure and the ability of resistance differential settlement deformation are also increased, can be subtracted
The quantity of few transverse pile foundation, reduces investment.
It is low when putting circuit and passing through soft soil zone, should according to embankment stability need to carry out ground superficial layer it is necessary plus
Gu form shallow layer reinforcement area 6.The reinforcement depth in shallow layer reinforcement area 6 is controlled by embankment stability, and its reinforcement depth should be according to embankment
Raising, foundation condition are determined by stability calculation.Compared to by settling and stablizing traditional single ground during Two indices control
For reinforcing mode, the reinforcement depth of shallow layer reinforcement area 6 is small, with reference to the first pile foundation bearing structure 3 can effectively control roadbed reclamation and
Post-construction settlement of subgrade.By contrast, the new structure foundation stabilization quantity is small, and investment is small, and more conducively after construction quality and work
The control of sedimentation, and save cost and shorten the duration.
Specific making step of the invention is as follows：
(1) construction overhead bridge structure abutment, bridge abutment body concrete is poured, abutment of constructing, backfills abutment foundation foundation ditch；
The positioning of pin and embedded work should be performed before abutment concreting；
(2) it is low after smooth platform to put circuit location construction site, carried out according to design requirement at necessary shallow layer foundation reinforcing
Reason, after the completion of basement process, by changeover portion design requirement fill it is low after platform put geotechnique basis under circuit support rail beam, support rail beam after platform
The lower basic filling construction synchronous with abutment cone of geotechnique.According to each position wire feeding and compaction requirement, changeover portion when filling
Scope with non-changeover portion area is synchronous layered fills, next layer fills after detection meets the requirements and fills last layer again, until reinforcing bar mixes
At solidifying native support rail beam bottom plate bottom surface absolute altitude；
(3) in armored concrete support rail beam bottom plate bottom surface, absolute altitude is in embankment subgrade cross section, the construction of vertical section direction is bored
Hole pouring pile, i.e. the first pile foundation bearing structure 3, drilled pile construction should use and small construction technology disturbed to railway embankment, must
Steel pile casting is set in embankment altitude range when wanting or draws hole；, will by specification after cast-in-situ bored pile reaches desired strength
Ask amputation pile crown, assembling reinforcement concrete support rail beam bottom plate and the connection reinforcing bar with stake；
(4) according to design attitude to reinforced concrete supporting beam 901, the formwork erection of convex block machine 91, one-time-concreting shaping, before pouring
Carry out all kinds of built-in fittings such as pin 15 and positioning and installation with the connection reinforcing bar of pile foundation, concrete are removed after reaching design strength
Template；
(5) high-strength wearable sliding layer is laid on abutment in armored concrete support rail beam and abutment overlap joint, according to design
Section length reaches design to armored concrete support rail beam bottom plate 2 and the merogenesis formwork erection of reinforced concrete beam type structure 1, each part concrete
Form removal is distinguished after intensity, intilted transverse drainage slope and longitudinal direction row are made in backfill face between reinforced concrete beam type structure
Top layer waterproof is simultaneously carried out in water slope by design requirement, one-time-concreting shaping, all kinds of built-in fittings such as pin, sleeper pedestal is carried out before pouring
Connect the positioning and installation of reinforcing bar, water conservancy diversion rail bearing built-in fitting etc.；
(6) construction is low puts the joint both sides headwall 13 of circuit bridge abutment 12, and headwall 13 is applied using concrete one-piece casting
Work, wait the concrete of headwall 13 to reach form removal after design strength, then put circuit graded broken stone top by design requirement construction is low
Backfill layer, confining bed, the associated satellite structures in face, by design and construction cone top surface confining bed of bridge abutment 12 etc., side of constructing
Slope protection, drainage system etc..
(7) carry out it is low put circuit and the laying of the elevated structure section of track and the installation and construction of associated satellite engineering, construction finishes
Afterwards.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (9)
1. medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail beam transition section structure, it is characterised in that including first
Base bearing structure, pile foundation joist composite bearing structure, armored concrete support rail beam bottom plate, two placing of reinforcement concrete beam-type structures,
Roadbed filling, support rail beam both sides backfill filler, bridge abutment, trapezoidal filling body and headwall under support rail beam, wherein,
The first pile foundation bearing structure and the pile foundation joist composite bearing structure accept the armored concrete support rail jointly
Beam bottom plate；
The first pile foundation bearing structure is provided with more, and the every first pile foundation bearing structure is vertically arranged, and often
Accept the armored concrete support rail beam bottom plate, the first pile foundation carrying knot in the top of first pile foundation bearing structure described in root
The top of structure is embedded in the armored concrete support rail beam bottom plate and its rigid connection；
Accept reinforced concrete beam type structure described in two rows, and two adjacent sections in the top of the armored concrete support rail beam bottom plate
Internode expansion joint is set between the armored concrete support rail beam bottom plate；
The pile foundation joist composite bearing structure setting has the armored concrete support rail beam bottom plate of multiple and adjacent two pieces
Internode expansion joint at be respectively provided with a pile foundation joist composite bearing structure, for supporting this adjacent two section reinforcing bar
Concrete support rail beam bottom plate, each pile foundation joist composite bearing structure includes reinforced concrete supporting beam and the second pile foundation is held
Structure is carried, and the reinforced concrete supporting beam is accepted on the top of the every second pile foundation bearing structure, and the reinforcing bar mixes
Solidifying native joist accepts the armored concrete support rail beam bottom plate；
The top of the second pile foundation bearing structure is embedded in the reinforced concrete supporting beam and its rigid connection, the armored concrete support
Beam and the armored concrete support rail beam bottom plate rigid connection or overlap joint, the armored concrete support rail beam bottom plate and the reinforced concrete
Native girder structure formed by integrally casting is molded so as to collectively form armored concrete support rail beam；
The reinforced concrete supporting beam both sides are provided with for limiting the convex of the armored concrete support rail beam bottom plate lateral displacement
Type block machine；
Wired weathering section be set between reinforced concrete beam type structure described in two rows, and weathering section has laterally between the line
The gradient and head fall, for current to be introduced to the internode expansion joint of two adjacent sections armored concrete support rail beam bottom plate and then are incited somebody to action
Current are discharged；
Roadbed filling is arranged between shallow layer reinforcement area and the armored concrete support rail beam bottom plate under the support rail beam, for
Filler is backfilled for the armored concrete support rail beam bottom plate, reinforced concrete supporting beam and support rail beam both sides, and construction platform is provided, and
Lateral support is provided for the pile foundation bearing structure；Wherein, the shallow layer reinforcement area is arranged on the superficial floor of soft stratum, and
Roadbed filling and the vertical consistency of the reinforced concrete beam type structure under the shallow layer reinforcement area, the support rail beam；
The support rail beam both sides backfill filler is accepted by roadbed filling under the support rail beam, and the support rail beam both sides backfill
Filler props up the both sides of the armored concrete support rail beam bottom plate, to be shielded to the armored concrete support rail beam bottom plate
And the transverse shifting of the constraint armored concrete support rail beam bottom plate, and maintenance passage is provided；
Roadbed filling and support rail beam both sides backfill filler collectively form filler filling body under the support rail beam, and the filler is filled out
Building body both sides are provided with the first weathering；
The lower end of the every first pile foundation bearing structure sequentially passes through roadbed filling under the support rail beam, the shallow layer reinforcement area
Stretched into after the soft stratum in supporting course, so that when soft stratum produces sedimentation, the first pile foundation bearing structure can be held
By negative friction, so that stable bearing capacity is provided to armored concrete support rail beam bottom plate and reinforced concrete beam type structure, with
The sedimentation because of filler filling body is reduced to adverse effect caused by the vertical of armored concrete support rail beam, vertical and horizontal rigidity；
One end of the armored concrete support rail beam bottom plate is overlapped on the bridge abutment, and both are released by pin connection
Longitudinal restraint is put, and limits lateral displacement；
The both sides of one end that the armored concrete support rail beam bottom plate is overlapped on the bridge abutment set the headwall respectively, and
And the headwall per side is abutted with the support rail beam both sides backfill filler of respective side respectively, and the support rail beam both sides are protected for gear
Backfill filler；
The trapezoidal filling body is arranged between shallow layer reinforcement area and the armored concrete support rail beam bottom plate, itself and the support rail
Roadbed filling abuts close to one end of the bridge abutment under beam, for accepting the armored concrete support rail beam bottom plate, holding
Beam-and-rail both sides backfill filler and headwall；
The trapezoidal filling body both sides are provided with second weathering consistent with the first weathering gradient.
2. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, the first pile foundation bearing structure is cast-in-situ bored pile, reinforced concrete supporting beam and armored concrete support rail beam bottom
Plate rigid connection or overlap joint, with the second pile foundation bearing structure rigid connection.
3. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, in the position at the internode expansion joint of armored concrete support rail beam, reinforced concrete supporting beam and armored concrete support rail
Beam bottom plate is overlapped using pin, and remaining position uses rigid connection.
4. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, the height of the support rail beam both sides backfill filler is equal with the height of the armored concrete support rail beam bottom plate.
5. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, all these described first pile foundation bearing structures are arranged in ranks.
6. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, the trapezoidal filling body mixes cement production systD using graded broken stone.
7. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, the armored concrete support rail beam bottom plate is overlapped between one end of the bridge abutment and the bridge abutment and set
It is equipped with wear-resisting sliding layer.
8. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, the pin includes pre-buried connection reinforcing bar, pitch hemp cut and stainless steel sleeve pipe, and the pre-buried connection reinforcing bar is located at institute
State in stainless steel sleeve pipe and the pitch hemp cut is set between the two.
9. pile foundation combined type support rail beam transition section structure in medium-and low-speed maglev two-wire embankment location according to claim 1, its
It is characterised by, the cross fall of weathering section is 3%~5% between the line, and head fall is not less than 2 ‰.
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| CN201610826167.2A CN106283953B (en) | 2016-09-15 | 2016-09-15 | Medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail beam transition section structure |
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| CN201610826167.2A CN106283953B (en) | 2016-09-15 | 2016-09-15 | Medium-and low-speed maglev two-wire embankment location pile foundation combined type support rail beam transition section structure |
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| CN106283953B true CN106283953B (en) | 2018-01-09 |
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| JP5425646B2 (en) * | 2010-01-12 | 2014-02-26 | 公益財団法人鉄道総合技術研究所 | Airtight bag body embankment |
| CN102535263B (en) * | 2012-02-14 | 2013-11-13 | 中铁十九局集团有限公司 | Roadbed with pile-net composite structure and construction method thereof |
| CN203270559U (en) * | 2013-05-29 | 2013-11-06 | 中铁第四勘察设计院集团有限公司 | Roadbed structure of screw pile network structure composite foundation |
| CN105544311B (en) * | 2016-01-17 | 2018-04-27 | 中铁二院工程集团有限责任公司 | A kind of rich water ground frost heaving resistant ballastless track roadbed structure |
| CN105887587B (en) * | 2016-04-29 | 2017-06-13 | 中铁第四勘察设计院集团有限公司 | A kind of low circuit switch area of putting of medium-and low-speed maglev is with non-switch area transition section structure |
| CN205557205U (en) * | 2016-04-29 | 2016-09-07 | 中铁第四勘察设计院集团有限公司 | Low circuit switch area NOT AND switch area changeover portion structure of putting of moderate -low speed magnetic levitation |
| CN206157482U (en) * | 2016-09-15 | 2017-05-10 | 中铁第四勘察设计院集团有限公司 | Moderate -low speed magnetic levitation double -line location pile foundation combined type support rail roof beam transition section structure that fills |
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