CN103541310B - A kind of long connection bridge widening splicing construction and construction method thereof - Google Patents
A kind of long connection bridge widening splicing construction and construction method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of long connection bridge widening splicing construction, comprise old bridge, new bridge and splicing seams, it is characterized in that: the lateral connection between described old bridge and new bridge is spliced by splicing seams, described splicing seams is made up of continuous splice sections and discrete splice sections two parts, the new bridge girder of described continuous splice sections is connected with diaphragm with adopting cast-in-place wet seam between old bridge girder, the new bridge girder of described discrete splice sections arranges a connecting elements every a segment distance and is connected with adopting between old bridge girder, thus it is new to make after widening, old bridge forms firmly overall structure.This structure has that construction method is simple, short construction period, avoid the many merits such as the old bridge seat generation shear failure after widening, be applicable to the construction of each standard highway long connection bridge widening, make full use of old bridge resource simultaneously, the requirement meeting sustainable development and build a resource-conserving and environment-friendly society, is worthy to be popularized.
Description
Technical field
The present invention relates to technical field of buildings, be specifically related to a kind of long connection bridge widening splicing construction and construction method thereof.
Background technology
In the last few years, along with China's rapid development of economy, China's communication has had significant progress.But, because personnel and goods and materials flow day by day frequent, cause the surge of transport need.As the highway of personnel and goods and materials flow channel, especially speedway, its existing scale and grade are more and more difficult to meet the requirement of economic development to it.Point out in " the Highway and Waterway transportation industry statistical communique of development in 2012 " of Planning Division of Ministry of Communications writing in 2013, within 2012, national speedway average daily traffic is 21305, per day traveling amount is 2,047,170,000 truck kilometers, annual mean traffic congestion degree is 0.35, increases by 7.3%, 20.2% and 5.7% respectively than 2011.In order to meet the demand of the growing traffic volume, currently mainly contain two kinds of settling modes: one is build new line; Two is the original circuits of widening and rebuilding.Owing to building new line costly, long construction period, and block traffic, therefore in the urgent need to carrying out reorganization and expansion to these speedways, being widened as six-lane or eight tracks by Four-Lane Road, improving its traffic capacity.Bridge occupies larger specific gravity in Modern High-Speed highway, and add that bridge widening exists technical sophistication, implements high, large to the existing traffic impact feature of difficulty, therefore bridge widening design has become the emphasis of Expressway Extension Project.
In bridge widening design, the connected mode between new, old bridge superstructure mainly contains two kinds: do not connect along vertical bridge to total length between the superstructure of 1. new, old bridge; Connect along vertical bridge to total length between the superstructure of 2. new, old bridge.Under the effects such as new, old bridge differential settlement, carload, easily occur that amount of deflection is poor, gnaw limit and deck paving indulges bridge to crack between new, the old bridge at connecting method splicing seams place 1., affect traffic safety and bridge is attractive in appearance, therefore in existing bridge widening design, all adopt connecting method 2..When bridge widening is spliced, the concrete contraction of old bridge, creeping completes substantially, and new bridge only completes a part, the concrete contraction of splicing seams newly, between old bridge, to creep, just occur, thus new bridge and also existing between splicing seams concrete and old bridge concrete shrink, difference of creeping, this can cause new bridge girder longitudinally to shorten the constraint that distortion is subject to old bridge girder, and the overall structure generation plain bending after widening is out of shape.For general simply supported girder bridge, because its span is little, thisly to be shunk by New-old concrete, that difference of creeping effect causes spliced overall structure generation plain bending to be out of shape is not obvious, the impact normally used this type of bridge is very little, negligible; But for long connection bridge, because span is larger, simply connected length is long, under New-old concrete contraction, difference of creeping effect, the plain bending distortion that overall structure after widening occurs will be very remarkable, and the bearing adopted due to the bridge built in early days is generally common laminated rubber bearing, its deformability is little, this can cause the old bridge seat direction across bridge displacement after long connection bridge widening excessive, there is shear failure, affect the normal use of this type of bridge, in the investigation after splicing for many years of the bridge of Shanghai-Nanjing Expressway Jiangsu Section, have also discovered this phenomenon.
At present, after mainly solving long connection bridge widening by the time of repose after extending new bridge and building up, overall structure generation plain bending distortion causes the displacement of old bridge seat direction across bridge excessive, and the problem of shear failure occurs.But, new bridge builds up rear required time of repose length (generally needs 2 ~ 3 years, have even more than 3 years), on the one hand seriously can extend construction period, on the other hand many adverse influences all be existed for economic benefit along the line and the traffic administration in later stage and maintenance, maintenance work.
Summary of the invention
In order to overcome the deficiency of existing long connection bridge widening technology, technical problem to be solved by this invention is to provide a kind of long connection bridge widening splicing construction and construction method thereof.
In order to solve the problems of the technologies described above, one of them technical scheme of the present invention is: a kind of long connection bridge widening splicing construction, comprise old bridge, new bridge and splicing seams, it is characterized in that: described old bridge is connected by splicing seams with the lateral connection between new bridge, described splicing seams is made up of continuous splice sections and discrete splice sections two parts, the new bridge girder of described continuous splice sections is connected with diaphragm with adopting cast-in-place wet seam between old bridge girder, new bridge floor in-situ layer is followed successively by above described cast-in-place wet seam, waterproofing course and new bridge deck pavement, described discrete splice sections refers to along vertical bridge to the discrete connection carrying out new and old bridge every a segment distance by arranging connecting elements, the top of described connecting elements is followed successively by separation layer, new bridge floor in-situ layer, waterproofing course and new bridge deck pavement, new bridge floor in-situ layer within the scope of described discrete splice sections arranges anticracking steel mesh reinforcement.
Wherein, cast-in-place wet seam within the scope of described continuous splice sections be after new bridge forms beam structure system by bridge in across pouring construction symmetrical to both sides, ratio between the direction across bridge maximum displacement value H that the direction across bridge shift value h of the length of continuous splice sections to be the value principle of m, m be old bridge seat after long connection bridge widening and corresponding bearing allow is not more than 1.
Diaphragm within the scope of described continuous splice sections be arranged on often across span centre and fulcrum place.
The span of the connecting elements setting space within the scope of described discrete splice sections is
~
, L is that the single span of long connection bridge is across footpath.
Another technical scheme of the present invention is: a kind of construction method growing connection bridge widening splicing construction, is characterized in that, carry out as follows:
(1) preparation of construction: remove the foreign material on former bridge floor, carries out construction operation scope and protects logical work, and according to plan construction task amount, be prepared in advance raw material and the plant equipment plan of marching into the arena; According to builder's road present situation, measure and indicate transition region, warning district, operation area and leading line;
(2) construction lofting: according to old bridge field condition, invar tape coordinates the anticollision barrier manually marking needs dismounting and the position cutting side bar frange plate and deck paving, also to confirm excision position under bridge simultaneously, guarantee that errorless rear line prepares to indicate;
(3) anticollision barrier is excised: after first boring hole for hoist on cut anticollision barrier, be cut into pieces by anticollision barrier, so that lifting is removed;
(4) part old bridge side bar frange plate and deck paving is cut: according to actual needs, mark at old bridge bridge floor and cut line accordingly, cut the deck paving of part old bridge side bar frange plate and top thereof accordingly, and the reinforcing bar of reserved certain length is used for welding with the reserved steel bar of adjacent new bridge side bar;
(5) bar planting: reinforcing bar is implanted in the web side of old bridge side bar 2 adjacent with new bridge side bar 4 within the scope of continuous splice sections, bar planting colloidality can should meet " highway bridge reinforcing design specification " (JTG/T J22-2008) the 4th related request of chapter;
(6) reinforcement welding: first by the reserved steel bar of new bridge side bar within the scope of continuous splice sections surface iron rust and eliminating impurities clean, then the reserved steel bar of old bridge side bar and bar planting reinforcing bar are welded with the reserved steel bar of new bridge side bar;
(7) build the wet seam within the scope of continuous splice sections and diaphragm concrete: reinforcement welding is complete, after qualified after testing, start wet seam and diaphragm template are installed, first with water will wet seam and diaphragm moistening, then start concreting;
(8) connecting elements within the scope of discrete splice sections is installed: for ensureing to spell the direction across bridge compatibility of deformation of wide rear new, old bridge, between the old bridge side bar within the scope of discrete splice sections and new bridge side bar, connecting elements is together set every a segment distance;
(9) separation layer within the scope of discrete splice sections is installed: for ensureing the smooth realization of long connection bridge widening splicing construction provided by the present invention, arrange above the old bridge side bar within the scope of discrete splice sections and new bridge side bar separation layer by the new bridge floor in-situ layer at this position and new, old bridge girder isolated;
(10) new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement are installed: treat that the concrete curing of cast-in-place wet seam and diaphragm is to after date, the overlap joint of new bridge floor in-situ layer reinforcing bar within the scope of continuous splice sections, welding can be started; Complete connecting elements to be installed and separation layer, and qualified after testing after, the overlap joint of new bridge floor in-situ layer anticracking steel mesh reinforcement within the scope of discrete splice sections, welding can be started;
(11) build new bridge floor in-situ layer: above-mentioned new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement arrange, after qualified after testing, start to build new bridge floor in-situ layer, casting method is with above-mentioned cast-in-place wet seam and diaphragm;
(12) waterproofing course is laid: treat that the maintenance of above-mentioned new bridge floor in-situ layer is to after date, starts to lay waterproofing course;
(13) build new bridge deck pavement: treat that above-mentioned waterproofing course has been laid, after qualified after testing, start to build new bridge deck pavement;
(14) new bridge anticollision barrier and other ancillary facilities are installed: treat that new bridge deck pavement maintenance is to after date, start new bridge anticollision barrier and other ancillary facilities are installed.
Wherein, in described step (4), the scope that cuts of old bridge girder frange plate and deck paving should be determined according to the concrete condition of every long bridge.
Cast-in-place wet seam in described step (7) within the scope of the continuous splice sections concrete used with diaphragm should have that to ensure between new-old concrete good and be connected and the function of waterproofing and anti-leakage.
The special requirement of the material of the separation layer in described step (9) within the scope of discrete splice sections, only need ensure by the new bridge floor in-situ layer in discrete splice sections and new, old bridge girder isolated.
The kind of the anticracking steel mesh reinforcement reinforcing bar used set up in the new bridge floor in-situ layer in described step (10) within the scope of discrete splice sections is determined according to the concrete condition of every long bridge.
New bridge floor in-situ layer in described step (11) within the scope of discrete splice sections concrete used should have water-proof function.
The present invention has actively useful effect:
1, part is only had to adopt cast-in-place wet seam to be connected with diaphragm in the present invention between long new, the old bridge joining bridge, decrease and widen rear integrally-built plain bending and be out of shape the old bridge seat direction across bridge displacement caused, avoid bearing generation shear failure, ensure that the functional performance of widening long connection bridge, effectively can shorten construction period, the crowded present situation of the quick solution existing vehicle on highway traffic volume simultaneously; Make full use of old bridge resource, old bridge also can be avoided to discard the building waste caused, realize Circular Economy and sustainable development, the requirement of meet building energy conservation, building a resource-conserving and environment-friendly society, is worthy to be popularized.
2, the present invention integrates that construction method is simple, short construction period, new, old bridge to form after entirety the advantage such as stressed jointly, is applicable to the construction of each standard highway long connection bridge widening, has good economic benefit and social value after popularization.
3, structure of the present invention and method be applicable to speedway, one, two, three highway and urban road, municipal engineering highway etc. long connection bridge widen construction.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the overall structure floor map of the embodiment of the present invention.
Fig. 2 is B-B sectional view in Fig. 1.
Fig. 3 is C-C sectional view in Fig. 1.
Fig. 4 is the enlarged diagram of A in Fig. 1.
Fig. 5 is D-D sectional view in Fig. 4.
Fig. 6 is E-E sectional view in Fig. 4.
In figure: 1 is old bridge; 2 is old bridge side bar; 3 is cast-in-place wet seam; 4 is new bridge side bar; 5 is new bridge; 6 is cast-in-place diaphragm; 7 is the prefabricated diaphragm of new bridge; 8 is median strip; 9 is separation layer; 10 is new bridge floor in-situ layer; 11 is new bridge floor in-situ layer reinforcing bar; 12 is old bridge floor in-situ layer; 13 is waterproofing course; 14 is connecting elements; 15 is anticracking steel mesh reinforcement; 16 is new bridge deck pavement; 17 is old bridge anticollision barrier; 18 is new bridge anticollision barrier.
Detailed description of the invention
The present invention is set forth further below in conjunction with specific embodiment.Process in following embodiment, if no special instructions, is conventional method: raw material used in following embodiment and instrument, if no special instructions, is commercially available.
A kind of long connection bridge widening splicing construction, see Fig. 1 ~ Fig. 6, comprise old bridge 1, new bridge 5 and splicing seams, splicing seams between old bridge side bar 2 and new bridge side bar 4 is made up of continuous splice sections and discrete splice sections two parts, wherein, the old bridge side bar 2 of continuous splice sections is connected with diaphragm with adopting cast-in-place wet seam 3 between new bridge side bar 4, is followed successively by new bridge floor in-situ layer 10, waterproofing course 13 and new bridge deck pavement 16 above cast-in-place wet seam; The old bridge side bar 2 of discrete splice sections arranges a connecting elements 14 every a segment distance and is connected with adopting between new bridge side bar 4, above connecting elements 14, be followed successively by separation layer 9, new bridge floor in-situ layer 10, waterproofing course 13 and new bridge deck pavement 16, in the new bridge floor in-situ layer 10 within the scope of discrete splice sections, anticracking steel mesh reinforcement 15 is set.
The construction construction method of above-mentioned long connection bridge widening splicing construction, the first constructed new bridge 5 matched in the one or both sides of old bridge 1, this new bridge implements following steps immediately or after sedimentation after a while again:
(1) preparation of construction: remove the foreign material on former bridge floor, carries out construction operation scope and protects logical work, and according to plan construction task amount, be prepared in advance raw material and the plant equipment plan of marching into the arena; According to builder's road present situation, measure and indicate transition region, warning district, operation area and leading line;
(15) construction lofting: according to old bridge field condition, invar tape coordinates the anticollision barrier manually marking needs dismounting and the position cutting side bar frange plate and deck paving, also to confirm excision position under bridge simultaneously, guarantee that errorless rear line prepares to indicate;
(16) anticollision barrier is excised: after first boring hole for hoist on cut anticollision barrier, be cut into pieces by anticollision barrier, so that lifting is removed;
(17) part old bridge side bar frange plate and deck paving is cut: according to actual needs, mark at old bridge bridge floor and cut line accordingly, cut the deck paving of part old bridge side bar frange plate and top thereof accordingly, and the reinforcing bar of reserved certain length is used for welding with the reserved steel bar of adjacent new bridge side bar;
(18) bar planting: reinforcing bar is implanted in the web side of old bridge side bar 2 adjacent with new bridge side bar 4 within the scope of continuous splice sections, bar planting colloidality can should meet " highway bridge reinforcing design specification " (JTG/T J22-2008) the 4th related request of chapter;
(19) reinforcement welding: first by the reserved steel bar of new bridge side bar 4 within the scope of continuous splice sections surface iron rust and eliminating impurities clean, then the reserved steel bar of old bridge side bar 2 and bar planting reinforcing bar are welded with the reserved steel bar of new bridge side bar 4;
(20) build the wet seam within the scope of continuous splice sections and diaphragm concrete: reinforcement welding is complete, after qualified after testing, start wet seam and diaphragm template are installed, first with water will wet seam and diaphragm moistening, then start concreting;
(21) connecting elements 14 within the scope of discrete splice sections is installed: for ensureing to spell the direction across bridge compatibility of deformation of wide rear new, old bridge, between the old bridge side bar 2 within the scope of discrete splice sections and new bridge side bar 4, connecting elements 16 is together set every a segment distance;
(22) separation layer 11 within the scope of discrete splice sections is installed: for ensureing the smooth realization of long connection bridge widening splicing construction provided by the present invention, arrange above the old bridge side bar 2 within the scope of discrete splice sections and new bridge side bar 4 separation layer 11 by the new bridge floor in-situ layer at this position and new, old bridge girder isolated;
(23) new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement are installed: treat that the concrete curing of cast-in-place wet seam and diaphragm is to after date, the overlap joint of new bridge floor in-situ layer reinforcing bar within the scope of continuous splice sections, welding can be started; Complete connecting elements to be installed 16 and separation layer 11, and qualified after testing after, the overlap joint of new bridge floor in-situ layer anticracking steel mesh reinforcement within the scope of discrete splice sections, welding can be started;
(24) build new bridge floor in-situ layer: above-mentioned new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement arrange, after qualified after testing, start to build new bridge floor in-situ layer, casting method is with above-mentioned cast-in-place wet seam and diaphragm;
(25) waterproofing course is laid: treat that the maintenance of above-mentioned new bridge floor in-situ layer is to after date, starts to lay waterproofing course;
(26) build new bridge deck pavement: treat that above-mentioned waterproofing course has been laid, after qualified after testing, start to build new bridge deck pavement;
(27) new bridge anticollision barrier and other ancillary facilities are installed: treat that new bridge deck pavement maintenance is to after date, start new bridge anticollision barrier and other ancillary facilities are installed.
In described step (4), the scope that cuts of old bridge 1 girder frange plate and deck paving should be determined according to the concrete condition of every long bridge.
Cast-in-place wet seam in described step (7) within the scope of the continuous splice sections concrete used with diaphragm should have that to ensure between new-old concrete good and be connected and the function of waterproofing and anti-leakage.
Cast-in-place wet seam in described step (7) within the scope of continuous splice sections be after new bridge forms beam structure system by bridge in across pouring construction symmetrical to both sides, ratio between the direction across bridge maximum displacement value H that the direction across bridge shift value h of the length of continuous splice sections to be the value principle of m, m be old bridge seat after long connection bridge widening and corresponding bearing allow is not more than 1(
1).
Diaphragm in described step (7) within the scope of continuous splice sections be arranged on often across span centre and fulcrum place.
The material of the connecting elements 14 in described step (8) within the scope of discrete splice sections does not require (as available steel or concrete etc.) especially, principle be ensure to spell wide after the direction across bridge compatibility of deformation of new, old bridge, the span of the setting space of connecting elements 14 is
~
(L is that the single span of long connection bridge is across footpath), concrete value should be determined according to the actual conditions of every long bridge.
The material of the separation layer 11 in described step (9) within the scope of discrete splice sections does not require (as available steel sheet or asphaltic felt etc.) especially, only need ensure by the new bridge floor in-situ layer in discrete splice sections and new, old bridge girder isolated.
The kind of the anticracking steel mesh reinforcement reinforcing bar used set up in the new bridge floor in-situ layer in described step (10) within the scope of discrete splice sections is determined according to the concrete condition of every long bridge.
New bridge floor in-situ layer in described step (11) within the scope of discrete splice sections concrete used should have water-proof function.
Above-mentioned construction method is less on driving impact, and construction is simple, convenient, and operating expenses is lower, and new, old bridge is jointly stressed after forming entirety.
The present invention is not limited to above-mentioned preferred forms, and anyone, changing each the concrete parameter in above-described embodiment, can form multiple concrete embodiment.All equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. one kind long bridge widening splicing construction, comprise old bridge, new bridge and splicing seams, it is characterized in that: described old bridge is connected by splicing seams with the lateral connection between new bridge, described splicing seams is made up of continuous splice sections and discrete splice sections two parts, the new bridge girder of described continuous splice sections is connected with diaphragm with adopting cast-in-place wet seam between old bridge girder, new bridge floor in-situ layer is followed successively by above described cast-in-place wet seam, waterproofing course and new bridge deck pavement, described discrete splice sections refers to along vertical bridge to the discrete connection carrying out new and old bridge every a segment distance by arranging connecting elements, the top of described connecting elements is followed successively by separation layer, new bridge floor in-situ layer, waterproofing course and new bridge deck pavement, new bridge floor in-situ layer within the scope of described discrete splice sections arranges anticracking steel mesh reinforcement.
2. one according to claim 1 long connection bridge widening splicing construction, it is characterized in that: the cast-in-place wet seam within the scope of described continuous splice sections be after new bridge forms beam structure system by bridge in across pouring construction symmetrical to both sides, the direction across bridge shift value of the length of continuous splice sections to be the value principle of m, m be old bridge seat after long connection bridge widening
hthe direction across bridge maximum displacement value allowed with corresponding bearing
hbetween ratio be not more than 1.
3. one according to claim 2 long connection bridge widening splicing construction, is characterized in that: the diaphragm within the scope of described continuous splice sections be arranged on often across span centre and fulcrum place.
4. one according to claim 1 long connection bridge widening splicing construction, is characterized in that: the span of the connecting elements setting space within the scope of described discrete splice sections is
~
, L is that the single span of long connection bridge is across footpath.
5. a construction method for long bridge widening splicing construction, is characterized in that, carries out as follows:
(1) preparation of construction: remove the foreign material on former bridge floor, carries out construction operation scope and protects logical work, and according to plan construction task amount, be prepared in advance raw material and the plant equipment plan of marching into the arena; According to builder's road present situation, measure and indicate transition region, warning district, operation area and leading line;
(2) construction lofting: according to old bridge field condition, invar tape coordinates the anticollision barrier manually marking needs dismounting and the position cutting side bar frange plate and deck paving, also to confirm excision position under bridge simultaneously, guarantee that errorless rear line prepares to indicate;
(3) anticollision barrier is excised: after first boring hole for hoist on cut anticollision barrier, be cut into pieces by anticollision barrier, so that lifting is removed;
(4) part old bridge side bar frange plate and deck paving is cut: according to actual needs, mark at old bridge bridge floor and cut line accordingly, cut the deck paving of part old bridge side bar frange plate and top thereof accordingly, and the reinforcing bar of reserved certain length is used for welding with the reserved steel bar of adjacent new bridge side bar;
(5) bar planting: reinforcing bar is implanted in the web side of old bridge side bar (2) adjacent with new bridge side bar (4) within the scope of continuous splice sections, bar planting colloidality can should meet " highway bridge reinforcing design specification " (JTG/T J22-2008) the 4th related request of chapter;
(6) reinforcement welding: first by the reserved steel bar of new bridge side bar within the scope of continuous splice sections surface iron rust and eliminating impurities clean, then the reserved steel bar of old bridge side bar and bar planting reinforcing bar are welded with the reserved steel bar of new bridge side bar;
(7) build the wet seam within the scope of continuous splice sections and diaphragm concrete: reinforcement welding is complete, after qualified after testing, start wet seam and diaphragm template are installed, first with water will wet seam and diaphragm moistening, then start concreting;
(8) connecting elements within the scope of discrete splice sections is installed: for ensureing to spell the direction across bridge compatibility of deformation of wide rear new, old bridge, between the old bridge side bar within the scope of discrete splice sections and new bridge side bar, connecting elements is together set every a segment distance;
(9) separation layer within the scope of discrete splice sections is installed: for ensureing the smooth realization of long connection bridge widening splicing construction provided by the present invention, arrange above the old bridge side bar within the scope of discrete splice sections and new bridge side bar separation layer by the new bridge floor in-situ layer at this position and new, old bridge girder isolated;
(10) new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement are installed: treat that the concrete curing of cast-in-place wet seam and diaphragm is to after date, the overlap joint of new bridge floor in-situ layer reinforcing bar within the scope of continuous splice sections, welding can be started; Complete connecting elements to be installed and separation layer, and qualified after testing after, the overlap joint of new bridge floor in-situ layer anticracking steel mesh reinforcement within the scope of discrete splice sections, welding can be started;
(11) build new bridge floor in-situ layer: above-mentioned new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement arrange, after qualified after testing, start to build new bridge floor in-situ layer, casting method is with above-mentioned cast-in-place wet seam and diaphragm;
(12) waterproofing course is laid: treat that the maintenance of above-mentioned new bridge floor in-situ layer is to after date, starts to lay waterproofing course;
(13) build new bridge deck pavement: treat that above-mentioned waterproofing course has been laid, after qualified after testing, start to build new bridge deck pavement;
(14) new bridge anticollision barrier and other ancillary facilities are installed: treat that new bridge deck pavement maintenance is to after date, start new bridge anticollision barrier and other ancillary facilities are installed.
6. a kind of construction method growing connection bridge widening splicing construction according to claim 5, is characterized in that: in described step (4), the scope that cuts of old bridge girder frange plate and deck paving should be determined according to the concrete condition of every long bridge.
7. a kind of construction method growing connection bridge widening splicing construction according to claim 5, is characterized in that: the concrete used with diaphragm of the cast-in-place wet seam in described step (7) within the scope of continuous splice sections should have that to ensure between new-old concrete good and be connected and the function of waterproofing and anti-leakage.
8. a kind of construction method growing connection bridge widening splicing construction according to claim 5, it is characterized in that: the special requirement of the material of the separation layer in described step (9) within the scope of discrete splice sections, only need ensure by the new bridge floor in-situ layer in discrete splice sections and new, old bridge girder isolated.
9. a kind of construction method growing connection bridge widening splicing construction according to claim 5, is characterized in that: the kind of the anticracking steel mesh reinforcement reinforcing bar used set up in the new bridge floor in-situ layer in described step (10) within the scope of discrete splice sections is determined according to the concrete condition of every long bridge.
10. a kind of construction method growing connection bridge widening splicing construction according to claim 5, is characterized in that: the concrete used of the new bridge floor in-situ layer in described step (11) within the scope of discrete splice sections should have water-proof function.
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| CN113106879B (en) * | 2021-04-19 | 2023-01-13 | 华东交通大学 | Connecting structure for widening concrete box girder by steel box girder and construction method |
| CN113089496A (en) * | 2021-05-06 | 2021-07-09 | 山东省路桥工程设计咨询有限公司 | Calculation method for upper structure design of variable-width prefabricated bridge |
| CN115450146A (en) * | 2022-09-30 | 2022-12-09 | 中铁二十局集团第一工程有限公司 | Bridge widening method |
| CN116561860B (en) * | 2023-05-06 | 2023-10-27 | 中交第二公路勘察设计研究院有限公司 | Segment test piece design method suitable for staggered width splicing bridge model test |
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| US7013520B1 (en) * | 2002-05-24 | 2006-03-21 | Snead Edwin Desteiguer | Method for positioning a pile cap underneath an existing elevated bridge assembly |
| DE102009026004A1 (en) * | 2009-06-19 | 2010-12-23 | Brandauer, Franz, Dipl.-Ing. | Method for extension of existing bridge, involves assembling cantilever brackets to form extension cross-section, removing existing road surface on part of bridge, concreting cross-section, making seal, and building actual road surfaces |
| CN101613997B (en) * | 2009-07-21 | 2011-02-16 | 清华大学 | Method for widening steel-concrete combination |
| CN202227284U (en) * | 2011-05-25 | 2012-05-23 | 河南省九建工程有限公司 | Bridge widening splicing structure |
| CN203530865U (en) * | 2013-10-15 | 2014-04-09 | 福州大学 | Long-connection bridge widening splicing structure |
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