CN206529659U - The Treatment of Expansive Soil Embankment structure that sandwich method improvement is reinforced - Google Patents
The Treatment of Expansive Soil Embankment structure that sandwich method improvement is reinforced Download PDFInfo
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- CN206529659U CN206529659U CN201720103190.9U CN201720103190U CN206529659U CN 206529659 U CN206529659 U CN 206529659U CN 201720103190 U CN201720103190 U CN 201720103190U CN 206529659 U CN206529659 U CN 206529659U
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Abstract
The utility model discloses the Treatment of Expansive Soil Embankment structure that a kind of improvement of sandwich method is reinforced, the structure includes surface layer of subgrade bed, bottom layer of subgrade, roadbed body successively from top to bottom, and roadbed body fills region by swelled ground and conditioned soil is filled region and is spaced apart and constitutes；Roadbed body both sides side slope is provided with anti-slippery grid, surface layer of subgrade bed, bottom layer of subgrade bottom and roadbed body middle expansive soils fill sections bottom and are all provided with transverse drainage slope, swelled ground fills to bury in the transverse drainage slope in region is provided with loaded filter around oblique spilled water hole, oblique spilled water hole.The utility model overcomes swelled ground to use the technology prejudice of embankment, so that quality meets requirement after the construction of swelled ground area embankment, and betterment expense can be greatly reduced, simplify construction technology process, it is easy to extensive construction continuously to fill, reach technology rationally, the purpose of cost, with wide application value.
Description
Technical field
The utility model is related to railway subgrade works field, and the Treatment of Expansive Soil Embankment reinforced is improved in particular to a kind of sandwich method
Structure.
Background technology
Often swelled ground is called disastrous soil to engineering circles, and its key property has：Breathing domestic animal, fissurity, overconsolidation, these three
The complicated collective effect of characteristic causes its engineering properties extreme difference, and usually all kinds of engineering constructions are caused with huge harm, and its
Harm often has multiple, repeatability and long-term potentiality.
China is that swelled ground is distributed one of most wide country, the especially middle and lower reaches in the Changjiang river and the Yellow River, and southern edge
Sea and southwest, swelled ground are developed the most, are distributed the most universal.Exemplified by just on newly-built illiteracy Sinorael road, its circuit is three
Door gorge to Jingmen section is divided into cloth swelled ground about 211.3km, and the line is busy, and road is always about 45.5%；Wherein strong swelling soil about 34.8km, in
Deng swelled ground about 109.8km, weak expansive soil about 66.7km.Three chaste trees section expansive soils roadbed length about 155.83km, accounts for road
The 63.3% of base total length.Swelled ground is widely distributed along the line, desirable without high quality filler in the range of wherein Dengzhou to Xiangyang about 120km,
It is inevitable to utilize Expansive Soil Filling, the expansive soil improvement soil side of embankment about 15,810,000.
The highway and railway built in national swelled ground area, roadbed are generally produced and squeezed outside sinking, and bedding is risen soil,
Slope erosion slip collapse, the serious plant disease such as slumping and landslide, some landslides not only cause roadbed to destroy in flakes, or even anti-together with roadbed
Shield reinforcing engineering is also damaged together, has a strong impact on traffic safety.Every year because of regulation subgrade in swelling soil zone disease, the investment of cost
More than 500,000,000 yuan, and the newborn disease of various subgrade in swelling soil zone is also constantly occurring.
Swelled ground is passed through more than the railway construction of region using type of bridge respectively under normal circumstances.Limited when by some conditions
System, it is necessary to during using roadbed form, due to the regional allocations of swelled ground, inevitably to use demi-inflation weaker
Filler carries out roadbed filling construction, if roadbed all directly using Expansive Soil Filling construction if be easy to occur above-mentioned disease,
So being filled after being carried out chemical modifying using swelled ground is filling roadbed at present, the selection of modifying agent is generally lime or water more
Mud, determines that the volume of modifying agent carries out test section and filled according to laboratory test match ratio, promotes completely using after pass the test, but
Conditioned soil fill exist complicated construction technique, qualified filler yield poorly be not easy to continuously to fill, construction quality it is uppity tired
Difficulty, therefore roadbed design must use special structure type, and the unfavorable characteristic that swelled ground is filled both is eliminated so as to reach, it is ensured that
Roadbed safety can simplify subgrade construction technique again, increase economic efficiency.
The content of the invention
In view of the shortcomings of the prior art, the purpose of this utility model is to provide the swelled ground that a kind of sandwich method improvement is reinforced
Embankment structure, to solve to use demi-inflation soil filling roadbed rainy season can not construction problem, the production of Expansive Soil Filling water-cut variation
The quality problems such as raw breathing destruction, the utility model can not only to use quality is met after the filling roadbed construction of swelled ground will
Ask, can also greatly reduce expansive soil improvement processing cost, reach technology rationally, the purpose of cost, and embankment raising is bigger,
Then more it can embody the economy of the road structure.
To achieve the above object, the Treatment of Expansive Soil Embankment structure that a kind of sandwich method improvement of the utility model is reinforced, from top to bottom
Include surface layer of subgrade bed, bottom layer of subgrade, roadbed body successively, it is characterized in that, the both sides of the surface layer of subgrade bed are provided with shield
Shoulder, the top both sides of the bottom layer of subgrade are provided with fringing, and the two bottom sides of the roadbed body are provided with lower fringing, described
The bottom of lower fringing is provided with support spats, and the roadbed body fills region by swelled ground and conditioned soil is filled and divided above and below region
Layer is spaced apart composition；Lower leaf is provided with anti-slippery grid, the surface layer of subgrade bed, bedding in the roadbed body both sides side slope
Bottom layer bottom and roadbed body middle expansive soils fill sections bottom and are all provided with transverse drainage slope, and the swelled ground fills the horizontal stroke in region
Buried into weathering around oblique spilled water hole, the oblique spilled water hole and be provided with loaded filter.
Further, the superiors' swelled ground of the roadbed body fills and anti-deformation reinforcing layer is provided with region, described
The orlop swelled ground of roadbed body, which is filled, is provided with waterproof cushion in region.Anti-deformation reinforcing layer is arranged on roadbed body
Portion, prevents overall collapse from deforming.The infiltration that waterproof cushion makes swelled ground fill region, which is maintained at swelled ground and filled in region, to be passed through
Oblique spilled water hole discharge causes bedding disaster without filling region into lower section conditioned soil.
Further, filled in the bottom layer of subgrade using AB fillers or conditioned soil is filled, filled using conditioned soil
When, at the top of bottom layer of subgrade, waterproof cushion is set；When being filled using AB fillers, partition pad is set in the bottom of bottom layer of subgrade
Layer.When being filled in the bottom layer of subgrade using conditioned soil, region is filled in the top laying swelled ground of roadbed body；Filled out using AB
When material is filled, region is filled in the top laying conditioned soil of roadbed body.If bottom layer of subgrade fills conditioned soil, roadbed body
Top layer is generally swelled ground, and expense is both economical；If bottom layer of subgrade fills AB group fillers, the top layer of roadbed body should be to change
Good soil prevents Defect of Foundation Bed of Express.
Further, the waterproof cushion is medium coarse sand bed course, and one layer of composite earthwork of folder in the middle part of medium coarse sand bed course
Film or capillary drainage plate.
Further, the anti-slippery grid is laid by direction earthwork grille level forms, and outer ledge is inflection knot
Structure.
Further, the surface layer of subgrade bed, bottom layer of subgrade bottom and roadbed body middle expansive soils fill sections bottom
The slope on the transverse drainage slope of both sides is 4%.
The Treatment of Expansive Soil Embankment structure that a kind of sandwich method improvement that the utility model is provided is reinforced, its core point is that embankment is filled out
When building, often fill after 1~3 layer of swelled ground, fill 1~2 layer using conditioned soil, such intercycle is filled, it is possible to resolve expansion
Native rainy season can not construction problem, it is ensured that layer is filled using changing in the continuous construction of roadbed filling, roadbed body bottom portion and top
Good soil is filled.
The utility model proposes a kind of sandwich method improvement reinforce Treatment of Expansive Soil Embankment structure there is the excellent of following several respects
Point：
(1) the utility model is applied to swelled ground area embankment engineering, lacks compared to conventional swelled ground area
All using conditioned soil come the design form of railway embankment in the case of high quality filler, road is filled using described embankment structure form
Dike can greatly reduce the quantity of conditioned soil, modifying agent material cost, working procedure and engineering time, so as to reduce engineering cost
With improving economic benefit.
(2) roadbed body is filled using conditioned soil and swelled ground interval, roadbed water proof effect is strengthened, while so that roadbed
Construction by rainy season influenceed reduction, as long as rainfall arriving before complete conditioned soil fill layer can ensure roadbed filling construction not by
Influence.
(3) compare and structure type was all filled using conditioned soil in the past, due to conditioned soil filling construction complex procedures, work efficiency
Slowly, it is unfavorable for extensive construction continuously to fill, conditioned soil usage amount can be greatly reduced using the structure type railway embankment,
And do not influenceed by rainy season, meet extensive construction and continuously fill requirement.
(4) when roadbed filling uses lime improvement road-mix construction, swelled ground can be sprinkled with lime and paved and filled out in roadbed
Build on face, used as the interim place that dries, road-mix construction is carried out after swelled ground moisture content is reduced to OK range,
Expansive Soil Filling lacks the problem of drying place when can solve continuously to fill on a large scale to a certain extent, it is ensured that the company of construction
Continuous property.
(5) roadbed bodies top using three-dimensional geogrid draw the wide bed set, and swelled ground fill a layer bottom bury it is oblique
Spilled water hole, keeps roadbed inner stuffing moisture content stable, takes these measures effectively to prevent roadbed side slope cracking, slip and collapse.
China's swelled ground is widely distributed, and the utility model overcomes swelled ground to use the technology prejudice of embankment, not only
So that quality meets requirement after the construction of swelled ground area embankment, and betterment expense can be greatly reduced, simplify construction technology
Flow, is easy to extensive construction continuously to fill, and reaches that technology is reasonable, the purpose of cost, with wide popularization and application valency
Value.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model sandwich method improves the first embodiment of the Treatment of Expansive Soil Embankment structure of reinforcing
Figure；
Fig. 2 is the structural representation that the utility model sandwich method improves second of the embodiment of Treatment of Expansive Soil Embankment structure reinforced
Figure；
Fig. 3 is the structural representation that the utility model sandwich method improves the third embodiment of the Treatment of Expansive Soil Embankment structure of reinforcing
Figure；
Fig. 4 is the structural representation that the utility model sandwich method improves the 4th kind of embodiment of Treatment of Expansive Soil Embankment structure reinforced
Figure；
Fig. 5 is anti-slippery grid outside inflection structure type in Fig. 1~Fig. 4；
Fig. 6 is oblique spilled water hole thin portion structure type in Fig. 1~Fig. 4.
In figure：Surface layer of subgrade bed 1, bottom layer of subgrade 2, roadbed body 3, waterproof cushion 4, swelled ground fills region 5, and conditioned soil is filled out
Region 6 is built, slippery grid 7 is prevented, oblique spilled water hole 8, anti-deformation reinforcing layer 9 supports spats 10, loaded filter 11, shoulder protector 12, upper edge
Side 13, lower fringing 14.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
The Treatment of Expansive Soil Embankment structure that a kind of sandwich method improvement of the utility model is reinforced, one embodiment such as Fig. 1, Fig. 5, figure
Shown in 6, the road bed of Treatment of Expansive Soil Embankment structure is shaped as triangle road camber, includes surface layer of subgrade bed 1, bedding bottom successively from top to bottom
Layer 2, roadbed body 3.The thickness 0.6m of surface layer of subgrade bed 1, fills A groups filler (except sandy soil).The thickness 1.9m of bottom layer of subgrade 2, fills and changes
Good soil.The top of bottom layer of subgrade 2 is provided with waterproof cushion 4.Waterproof cushion 4 is the thick medium coarse sand bed courses of 0.1m, and in medium coarse sand
The composite geo-membrane or capillary drainage plate of one layer of folder in the middle part of bed course.The paving location of waterproof cushion 4 is filled out according to bottom layer of subgrade
Material is different otherwise varied.
The both sides of surface layer of subgrade bed 1 are provided with shoulder protector 12, and the top both sides of bottom layer of subgrade 2 are provided with fringing 13, roadbed sheet
The two bottom sides of body 3 are provided with lower fringing 14, and the bottom of lower fringing 14 is provided with support spats 10.
Roadbed body 3 fills region 5 by swelled ground and conditioned soil is filled lower leaf on region 6 and is spaced apart and constitutes.Roadbed
The orlop swelled ground of body 3, which is filled, is also equipped with waterproof cushion 4 in region 5.Waterproof cushion 4 is the thick medium coarse sand pads of 0.1m
Layer, and press from both sides in the middle part of medium coarse sand bed course one layer of composite geo-membrane or capillary drainage plate.
Each swelled ground fills the bottom of region 5 and is all provided with the bottom of surface layer of subgrade bed 1 and bottom layer of subgrade 2, roadbed body 3
The heart to both sides slope be 4% transverse drainage slope.Swelled ground fills the bottom of region 5 and oblique sluice is buried in transverse drainage slope
Hole 8.Oblique spilled water hole 8 is managed using pvc, and tube wall need to leave spilled water hole, and loaded filter 11, loaded filter need to be set in embedment roadbed part
11 can add sand using rubble or sand gravel, and outside is wrapped up using geotextile.
Roadbed body 3 fills scope domestic demand and carries out reinforcement reinforcement measure, roadbed to side slope of embankment using geosynthetics
Lower leaf is provided with anti-slippery grid 7 in the both sides side slope of body 3, is laid at interval of 0.6m height levels and prevents slippery grid 7, anti-slip
Sliding grid 7 typically uses two-way one layer of GSZ, and width should be greater than conditioned soil bound edge transverse width, prevents the slippery outside of grid 7
Edge uses inflection mode, and diffraction length should basis《Railway bed geosynthetics application design specification》Calculated.It is anti-
The slippery bidirectional stretch intensity of grid 7 is not less than 25kN/m.Also unidirectional GSZ can be used, tensile strength is not less than 25kN/m,
Tensile strength direction should laterally be laid along roadbed section.
Second embodiment of the present utility model with the difference of one embodiment as shown in Fig. 2 be：Bottom layer of subgrade 2
AB fillers are filled, waterproof cushion 4 is arranged between the bottom of subfoundation 2, subfoundation 2 and roadbed body 3.
3rd embodiment of the present utility model with the difference of one embodiment as shown in figure 3, be：In bottom layer of subgrade
2 bottom sets anti-deformation reinforcing layer 9 close to the region of roadbed body 3, and anti-deformation reinforcing layer 9 uses three-dimensional geogrid, 1~2
Layer three-dimensional geogrid completely spreads bottom layer of subgrade 2, and three-dimensional tensile strength is not less than 110kN/m.
4th embodiment of the present utility model with the difference of second embodiment as shown in figure 4, be：In bottom layer of subgrade
2 bottom sets anti-deformation reinforcing layer 9 close to the region of roadbed body 3, and anti-deformation reinforcing layer 9 typically uses three-dimensional geogrid, 1
~2 layers of three-dimensional geogrid completely spread bottom layer of subgrade 2, and three-dimensional tensile strength is not less than 110kN/m.
The construction method for the Treatment of Expansive Soil Embankment structure reinforced is improved based on above-mentioned sandwich method, is comprised the following steps：
1) conditioned soil is made.With reference to the regional concrete condition of construction, by laboratory test determine conditioned soil evolutionary approach and
Match ratio is general that swelled ground is improved as modifying agent using cement or lime.
2) foundation bearing capacity is detected.The location inadequate to bearing capacity carries out stiffening basic ground.
3) placement in layers roadbed body, when roadbed body 3 is filled, every layer of compacted depth is no more than 30cm.
31) 1~2 layer of 3 bottom of roadbed body laying conditioned soil is filled into region 6, the thick medium coarse sands of one layer of 0.1m are laid on top
One layer of composite geo-membrane of folder in the middle of bed course, bed course, forms waterproof cushion 4.
32) 1~3 layer of swelled ground is laid on waterproof cushion 4 and fills region 5, and the two bottom sides of region 5 are filled in swelled ground
The transverse drainage slope that slope is 4% is set, and oblique spilled water hole 8 is buried in weathering, 1~2 layer of conditioned soil is then laid
Fill region 6.
When filling swelled ground and filling region 5, the swellability index of earth material need to be chemically examined by defined batch, it is ensured that soil
The shallow gesture grade of dilatancy of material must not be strong expansion, can only directly carry out roadbed filling using weak, middle expansive soils；Rainy season construction
When, completion conditioned soil, which is filled region 6 and filled, before rainfall is arrived reaches waterproof effect；When using lime improvement road-mix construction
When, swelled ground is paved on roadbed filling face, lime is sprinkled with as place is dried, after its moisture content is reduced to OK range
Carry out road-mix construction.
33) continue filling roadbed body 3, region 6 is filled using conditioned soil fill region 5 with swelled ground and be spaced to fill and apply
Work, so circulation.
34) 1~2 layer of the top of roadbed body 3, laying conditioned soil fills region 6.
35) side slope of roadbed body 3 carries out reinforcement reinforcement using anti-slippery grid 7 to Treatment of Expansive Soil Embankment side slope, at interval of
Spacing between the two-way one layer of GSZ of 0.6m height layings, each layer geosynthetics is not preferably less than each layer and fills layer most
Small thickness, and 1m is not preferably greater than, prevent that the width of slippery grid 7 should be greater than conditioned soil bound edge transverse width, prevent the slippery outside of grid 7
Edge uses inflection mode, and diffraction length should basis《Railway bed geosynthetics application design specification》Calculated.It is double
It is not less than 25kN/m to the bidirectional stretch intensity of GSZ.Also unidirectional GSZ can be used, tensile strength is not less than 25kN/
M, tensile strength direction should laterally be laid along roadbed section.
36) 1~2 layer of anti-deformation reinforcing layer 9 is completely spread close to the region of bottom layer of subgrade 2.Anti-deformation reinforcing layer 9 is using three-dimensional geotechnique
Grid, 1~2 layer of three-dimensional geogrid completely spreads bottom layer of subgrade 2, and three-dimensional tensile strength is not less than 110kN/m.
4) placement in layers bottom layer of subgrade 2, when bottom layer of subgrade 2 is filled, every layer of compacted depth is no more than 30cm.If bedding bottom
Layer 2 is filled using the AB group fillers of non-conditioned soil, then in medium coarse sand bed course thick the bottom laying 0.1m of bottom layer of subgrade 2, bed course
Middle part presss from both sides one layer of composite geo-membrane formation waterproof cushion 4；If bottom layer of subgrade 2 is filled using conditioned soil, at the top of bottom layer of subgrade 2
Lay waterproof cushion 4.
5) surface layer of subgrade bed 1 is filled.
Because conditioned soil complicated construction technique, construction quality require high, it can be greatly decreased using above-mentioned road structure form
The usage amount of conditioned soil in work progress, is easy to extensive construction continuously to fill, and the premise of roadbed quality is being ensured so as to reach
The purpose of the lower construction efficiency for improving roadbed filling.Above-mentioned road structure is applied to the road that swelled ground area raising is more than more than 3m
Dike fills location, and embankment raising is bigger, then more can embody the economy of the road structure.
Other unspecified parts are prior art.
Claims (7)
1. the Treatment of Expansive Soil Embankment structure that a kind of sandwich method improvement is reinforced, includes surface layer of subgrade bed (1), bottom layer of subgrade successively from top to bottom
(2), roadbed body (3), it is characterised in that：The both sides of the surface layer of subgrade bed (1) are provided with shoulder protector (12), the bottom layer of subgrade
(2) top both sides are provided with fringing (13), and the two bottom sides of the roadbed body (3) are provided with lower fringing (14), described
The bottom of lower fringing (14) is provided with support spats (10), and the roadbed body (3) fills region (5) and conditioned soil by swelled ground
Fill lower leaf on region (6) and be spaced apart composition；Lower leaf is provided with anti-slippery lattice in the side slope of roadbed body (3) both sides
Grid (7), it is equal that the surface layer of subgrade bed (1), bottom layer of subgrade (2) bottom and roadbed body (3) middle expansive soils fill region (5) bottom
If transverse drainage slope, the swelled ground fills and oblique spilled water hole (8) is buried in the transverse drainage slope in region (5), described oblique to let out
Loaded filter (11) is provided with around water hole (8).
2. the Treatment of Expansive Soil Embankment structure that sandwich method improvement according to claim 1 is reinforced, it is characterised in that：The roadbed sheet
The superiors' swelled ground of body (3) fills and anti-deformation reinforcing layer (9) is provided with region (5), the orlop of the roadbed body (3)
Swelled ground, which is filled, is provided with waterproof cushion (4) in region (5).
3. the Treatment of Expansive Soil Embankment structure that sandwich method improvement according to claim 1 or 2 is reinforced, it is characterised in that：The base
Filled in bed bottom (2) using AB fillers or conditioned soil is filled, when being filled using conditioned soil, the top in bottom layer of subgrade (2)
Waterproof cushion (4) is set；When being filled using AB fillers, waterproof cushion (4) is set in the bottom of bottom layer of subgrade (2).
4. the Treatment of Expansive Soil Embankment structure that sandwich method improvement according to claim 3 is reinforced, it is characterised in that：The partition pad
Layer (4) is medium coarse sand bed course, and one layer of composite geo-membrane of folder or capillary drainage plate in the middle part of medium coarse sand bed course.
5. the Treatment of Expansive Soil Embankment structure that the sandwich method improvement according to claims 1 or 2 is reinforced, it is characterised in that：It is described
Prevent that slippery grid (7) is laid by direction earthwork grille level to be formed, outer ledge is inflection structure.
6. the Treatment of Expansive Soil Embankment structure that sandwich method improvement according to claim 3 is reinforced, it is characterised in that：The bedding bottom
When being filled in layer (2) using conditioned soil, region (5) is filled in the top laying swelled ground of roadbed body (3)；Filled out using AB fillers
When building, region (6) is filled in the top laying conditioned soil of roadbed body (3).
7. the Treatment of Expansive Soil Embankment structure that sandwich method improvement according to claim 1 is reinforced, it is characterised in that：The bedding table
Layer (1), bottom layer of subgrade (2) bottom and roadbed body (3) middle expansive soils fill the transverse drainage slope of region (5) two bottom sides
Slope is 4%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676991A (en) * | 2017-01-23 | 2017-05-17 | 中铁第四勘察设计院集团有限公司 | Expansive soil embankment structure improved and reinforced by sandwich method and construction method |
| CN109706810A (en) * | 2018-11-29 | 2019-05-03 | 华东交通大学 | A kind of highway bed construction method that swelled ground fills |
-
2017
- 2017-01-23 CN CN201720103190.9U patent/CN206529659U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676991A (en) * | 2017-01-23 | 2017-05-17 | 中铁第四勘察设计院集团有限公司 | Expansive soil embankment structure improved and reinforced by sandwich method and construction method |
| CN109706810A (en) * | 2018-11-29 | 2019-05-03 | 华东交通大学 | A kind of highway bed construction method that swelled ground fills |
| CN109706810B (en) * | 2018-11-29 | 2023-03-24 | 华东交通大学 | Construction method of highway subgrade filled with expansive soil |
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