CN103541310A - Long-united bridge widening splicing structure and construction method thereof - Google Patents
Long-united bridge widening splicing structure and construction method thereof Download PDFInfo
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Abstract
The invention relates to a long-united bridge widening splicing structure which comprises an old bridge, a new bridge and a splicing seam. The long-united bridge widening splicing structure is characterized in that transverse splicing between the old bridge and the new bridge is realized through the splicing seam, the splicing seam is formed by a continuous splicing section and a discrete splicing section, a new bridge main beam and an old bridge main beam of the continuous splicing section are connected by adopting a cast-in-situ wet joint and a horizontal partition, and a new bridge main beam and an old bridge main beam of the discrete splicing section are connected by arranging a connecting component at an interval, so that the new bridge and the old bridge which are widened form a firm integral structure. The long-united bridge widening splicing structure has the advantages of simple construction method, short construction period, avoidance of shear failure of a widened old bridge support and the like, is suitable for long-united bridge widening construction of highways of various levels, fully utilizes resources of the old bridge, meets requirements of sustainable development and building of resource-saving and environment-friendly society, and is worthy of popularization.
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 job practices thereof.
Background technology
In the last few years, along with China's rapid development of economy, China's communication had had significant progress.But, because personnel and goods and materials flow day by day frequently, caused the surge of transport need.As highway, the especially speedway of personnel and goods and materials flow channel, its existing scale and grade are more and more difficult to meet the requirement of economic development to it.The < < of Planning Division of Ministry of Communications writing in 2013 points out in Highway and Waterway transportation industry statistical communique of development > > for 2012, within 2012, national speedway average daily traffic is 21305, the per day amount of travelling is 2,047,170,000 truck kilometers, annual mean traffic congestion degree is 0.35, than 2011, increases respectively 7.3%, 20.2% and 5.7%.In order to meet the demand of the growing traffic volume, currently mainly contain two kinds of settling modes: the one, build new line; The 2nd, widen the original circuit of reconstruction.Owing to building, new line expense is high, and long construction period, and blocking-up traffic, therefore in the urgent need to these speedways are carried out to reorganization and expansion, widened as six-lane or eight tracks by Four-Lane Road, improves its traffic capacity.Bridge occupies larger specific gravity in Modern High-Speed highway, add that bridge widening exists technical sophistication, implements high, large to the existing traffic impact feature of difficulty, so 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: 1. between the superstructure of new, old bridge, along vertical bridge, to total length, do not connect; 2. between the superstructure of new, old bridge, along vertical bridge, to total length, connect.Under the effects such as new, old bridge differential settlement, carload, between new, the old bridge at connecting method splicing seams place 1., easily occur that amount of deflection is poor, gnaw limit and deck paving is indulged bridge to crack, 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 has only completed a part, newly, the concrete contraction of the splicing seams between old bridge, creeping just occurs, thereby between new bridge and splicing seams concrete and old bridge concrete, exist contraction, the difference of creeping, this can cause new bridge girder longitudinally to shorten the constraint that distortion is subject to old bridge girder, makes the overall structure generation plain bending distortion after widening.For general simply supported girder bridge, because its span is little, this by New-old concrete shrink, the difference of creeping effect causes that spliced overall structure generation plain bending distortion is not obvious, very little, negligible on the normal impact of using of this type of bridge; But for long connection bridge, because span is larger, simply connected length is long, under New-old concrete contraction, the difference of creeping effect, the plain bending distortion that overall structure after widening occurs will be very remarkable, and the bearing adopting due to the early stage bridge of building 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 of the bridge of Shanghai-Nanjing Expressway Jiangsu Section after splicing for many years, also found this phenomenon.
At present, be mainly that after 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, there is the problem of shear failure.But, new bridge builds up rear required time of repose length (generally needs 2 ~ 3 years, have even over 3 years), on the one hand can seriously extend construction period, all there is many adverse influences in traffic administration and maintenance, the maintenance work for economic benefit along the line and later stage on the other hand.
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 job practices 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 connected with horizontal the connection by splicing seams between new bridge, described splicing seams is comprised of continuous splice sections and discrete splice sections two parts, between the new bridge girder of described continuous splice sections and old bridge girder, adopt cast-in-place wet seam to be connected with diaphragm, described cast-in-place wet seam top is followed successively by new bridge floor in-situ layer, waterproofing course and new bridge deck pavement, described discrete splice sections refers to it is along vertical bridge to carry out the discrete connection of new and old bridge by connecting elements is set every a segment distance, 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 should arrange 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 in bridge across the symmetrical pouring construction to both sides, the length of splice sections is m continuously, and the value principle of m is the direction across bridge shift value of old bridge seat after long connection bridge widening
hdirection across bridge maximum displacement value with corresponding bearing permission
hbetween ratio should be 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
~
, the single span that L is long connection bridge is across footpath.
Another technical scheme of the present invention is: a kind of job practices of growing connection bridge widening splicing construction, it is characterized in that, and carry out as follows:
(1) preparation of construction: remove the foreign material on former bridge floor, carry out construction operation scope and protect logical work, according to plan construction task amount, raw material and the plant equipment of the being prepared in advance 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 cooperation manually marks the position that needs the anticollision barrier of removing and cut side bar frange plate and deck paving, also under bridge, to excision position, confirm simultaneously, guarantee that errorless rear line preparation indicates;
(3) excision anticollision barrier: first bore after hole for hoist on cut anticollision barrier, anticollision barrier is cut into pieces, so that lifting is removed;
(4) cut part old bridge side bar frange plate and deck paving: according to actual needs, at old bridge bridge floor, mark and cut accordingly line, cut accordingly the deck paving of part old bridge side bar frange plate and top thereof, and the reinforcing bar of reserved certain length is for welding with the reserved steel bar of adjacent new bridge side bar;
(5) bar planting: reinforcing bar is implanted in the web side to old bridge side bar 2 adjacent with new bridge side bar 4 within the scope of continuous splice sections, bar planting should meet the related request of < < highway bridge reinforcing design standard > > (JTG/T J22-2008) the 4th chapter with colloidality energy;
(6) reinforcing bar welding: first that reserved steel bar surface iron rust and the eliminating impurities of new bridge side bar within the scope of continuous splice sections is clean, then by the reserved steel bar welding of the reserved steel bar of old bridge side bar and bar planting reinforcing bar and new bridge side bar;
(7) build wet seam and the diaphragm concrete within the scope of continuous splice sections: reinforcing bar has welded, qualified after testing after, start to install wet seam and diaphragm template, first water will wet seam and diaphragm moistening, then start concreting;
(8) connecting elements within the scope of discrete splice sections is installed: for guarantee spelling 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, every a segment distance, connecting elements is together set;
(9) separation layer within the scope of discrete splice sections is installed: for guaranteeing the smooth realization of long connection bridge widening splicing construction provided by the present invention, separation layer is set above the old bridge side bar within the scope of discrete splice sections and new bridge side bar the new bridge floor in-situ layer at this position and new, old bridge girder is 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, to after date, can start overlap joint, the welding of new bridge floor in-situ layer reinforcing bar within the scope of continuous splice sections; Complete connecting elements to be installed and separation layer, and after qualified after testing, can start overlap joint, the welding of new bridge floor in-situ layer anticracking steel mesh reinforcement within the scope of discrete splice sections;
(11) build new bridge floor in-situ layer: above-mentioned new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement arrange, qualified after testing after, start to build new bridge floor in-situ layer, casting method is with above-mentioned cast-in-place wet seam and diaphragm.
(12) lay waterproofing course: treat that the maintenance of above-mentioned new bridge floor in-situ layer, to after date, starts to lay waterproofing course;
(13) build new bridge deck pavement: treat that above-mentioned waterproofing course laid, qualified after testing after, 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, to after date, starts to install new bridge anticollision barrier and other ancillary facilities.
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.
In described step (7), continuously the cast-in-place wet seam concrete used with diaphragm within the scope of splice sections should have that good between assurance new-old concrete is connected and the function of waterproofing and anti-leakage.
The material of the separation layer in described step (9) within the scope of discrete splice sections does not have special requirement, only needs to guarantee the new bridge floor in-situ layer in discrete splice sections and new, old bridge girder is isolated.
The kind of the anticracking steel mesh reinforcement reinforcing bar used of setting 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 concrete used in described step (11) within the scope of discrete splice sections should have water-proof function.
The present invention has actively useful effect:
1, in the present invention, between new, the old bridge of long connection bridge, only have part to adopt cast-in-place wet seam to be connected with diaphragm, reduced and widened the old bridge seat direction across bridge displacement that rear integrally-built plain bending distortion causes, avoided bearing generation shear failure, guaranteed to widen the functional performance of long connection bridge, can effectively shorten construction period, the crowded present situation of the existing vehicle on highway traffic volume of quick solution simultaneously; Make full use of old bridge resource, also can avoid the discarded building waste causing of old bridge, 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 form the advantage such as common stressed after whole, is applicable to the construction of the long connection of each standard highway bridge widening, has good economic benefit and social value after popularization.
3, structure of the present invention and method are applicable to the long construction of widening that joins bridge of speedway, one, two, three highway and urban road, municipal engineering highway etc.
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.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Process in following embodiment, if no special instructions, is conventional method: raw material and instrument used in following embodiment, if no special instructions, is commercially available.
A kind of long connection bridge widening splicing construction, referring to 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 comprised of continuous splice sections and discrete splice sections two parts, wherein, continuously between the old bridge side bar 2 of splice sections and new bridge side bar 4, adopt cast-in-place wet seam 3 to be connected with diaphragm, above cast-in-place wet seam, be followed successively by new bridge floor in-situ layer 10, waterproofing course 13 and new bridge deck pavement 16; Between the old bridge side bar 2 of discrete splice sections and new bridge side bar 4, adopt and every a segment distance, a connecting elements 14 is set and is connected, 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, the interior anticracking steel mesh reinforcement 15 that arranges of new bridge floor in-situ layer 10 within the scope of discrete splice sections.
The construction job practices of above-mentioned long connection bridge widening splicing construction, first at the constructed new bridge matching 5 in the one or both sides of old bridge 1, this new bridge immediately or after sedimentation after a while, implement again following steps:
(1) preparation of construction: remove the foreign material on former bridge floor, carry out construction operation scope and protect logical work, according to plan construction task amount, raw material and the plant equipment of the being prepared in advance 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 cooperation manually marks the position that needs the anticollision barrier of removing and cut side bar frange plate and deck paving, also under bridge, to excision position, confirm simultaneously, guarantee that errorless rear line preparation indicates;
(16) excision anticollision barrier: first bore after hole for hoist on cut anticollision barrier, anticollision barrier is cut into pieces, so that lifting is removed;
(17) cut part old bridge side bar frange plate and deck paving: according to actual needs, at old bridge bridge floor, mark and cut accordingly line, cut accordingly the deck paving of part old bridge side bar frange plate and top thereof, and the reinforcing bar of reserved certain length is for welding with the reserved steel bar of adjacent new bridge side bar;
(18) bar planting: reinforcing bar is implanted in the web side to old bridge side bar 2 adjacent with new bridge side bar 4 within the scope of continuous splice sections, bar planting should meet the related request of < < highway bridge reinforcing design standard > > (JTG/T J22-2008) the 4th chapter with colloidality energy;
(19) reinforcing bar welding: first that reserved steel bar surface iron rust and the eliminating impurities of new bridge side bar 4 within the scope of continuous splice sections is clean, then by the reserved steel bar welding of the reserved steel bar of old bridge side bar 2 and bar planting reinforcing bar and new bridge side bar 4;
(20) build wet seam and the diaphragm concrete within the scope of continuous splice sections: reinforcing bar has welded, qualified after testing after, start to install wet seam and diaphragm template, first water will wet seam and diaphragm moistening, then start concreting;
(21) connecting elements 14 within the scope of discrete splice sections is installed: for guarantee spelling 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, every a segment distance, connecting elements 16 is together set;
(22) separation layer 11 within the scope of discrete splice sections is installed: for guaranteeing the smooth realization of long connection bridge widening splicing construction provided by the present invention, separation layer 11 is set above the old bridge side bar 2 within the scope of discrete splice sections and new bridge side bar 4 the new bridge floor in-situ layer at this position and new, old bridge girder is 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, to after date, can start overlap joint, the welding of new bridge floor in-situ layer reinforcing bar within the scope of continuous splice sections; Complete connecting elements to be installed 16 and separation layer 11, and after qualified after testing, can start newly overlap joint, the welding of bridge floor in-situ layer anticracking steel mesh reinforcement discrete splice sections within the scope of;
(24) build new bridge floor in-situ layer: above-mentioned new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement arrange, qualified after testing after, start to build new bridge floor in-situ layer, casting method is with above-mentioned cast-in-place wet seam and diaphragm.
(25) lay waterproofing course: treat that the maintenance of above-mentioned new bridge floor in-situ layer, to after date, starts to lay waterproofing course;
(26) build new bridge deck pavement: treat that above-mentioned waterproofing course laid, qualified after testing after, 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, to after date, starts to install new bridge anticollision barrier and other ancillary facilities.
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.
In described step (7), continuously the cast-in-place wet seam concrete used with diaphragm within the scope of splice sections should have that good between assurance new-old concrete is connected and the function of waterproofing and anti-leakage.
In described step (7) continuously the cast-in-place wet seam within the scope of splice sections be after new bridge forms beam structure system in bridge across the symmetrical pouring construction to both sides, continuously the length of splice sections is m, the value principle of m for long connection bridge widening after ratio between the direction across bridge shift value h of old bridge seat and the direction across bridge maximum displacement value H of corresponding bearing permission should be not more than 1(
1).
In described step (7) continuously the diaphragm within the scope of splice sections be arranged on often across span centre and fulcrum place.
Not special require (as available steel or the concrete etc.) of the material of the connecting elements 14 in described step (8) within the scope of discrete splice sections, principle is the direction across bridge compatibility of deformation of guarantee spelling new, the old bridge after wide, and the span of the setting space of connecting elements 14 is
~
(single span that L is long connection bridge is across footpath), concrete value should be determined according to the actual conditions of every long bridge.
Not special require (as available steel sheet or the asphaltic felt etc.) of the material of the separation layer 11 in described step (9) within the scope of discrete splice sections, only need to guarantee the new bridge floor in-situ layer in discrete splice sections and new, old bridge girder is isolated.
The kind of the anticracking steel mesh reinforcement reinforcing bar used of setting 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 concrete used in described step (11) within the scope of discrete splice sections should have water-proof function.
Above-mentioned job practices is less on driving impact, and construction is simple, convenient, and operating expenses is lower, and new, old bridge forms after integral body jointly stressed.
The present invention is not limited to above-mentioned preferred forms, and anyone each concrete parameter in changing above-described embodiment, can form a plurality of concrete embodiments.All equalizations of doing 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 connected with horizontal the connection by splicing seams between new bridge, described splicing seams is comprised of continuous splice sections and discrete splice sections two parts, between the new bridge girder of described continuous splice sections and old bridge girder, adopt cast-in-place wet seam to be connected with diaphragm, described cast-in-place wet seam top is followed successively by new bridge floor in-situ layer, waterproofing course and new bridge deck pavement, described discrete splice sections refers to it is along vertical bridge to carry out the discrete connection of new and old bridge by connecting elements is set every a segment distance, 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 should arrange anticracking steel mesh reinforcement.
2. a kind of length according to claim 1 joins 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 in bridge across the symmetrical pouring construction to both sides, the length of splice sections is m continuously, and the value principle of m is the direction across bridge shift value of old bridge seat after long connection bridge widening
hdirection across bridge maximum displacement value with corresponding bearing permission
hbetween ratio should be not more than 1.
3. a kind of long connection bridge widening splicing construction according to claim 2, 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. a kind of long connection bridge widening splicing construction according to claim 1, is characterized in that: the span of the connecting elements setting space within the scope of described discrete splice sections is
~
, the single span that L is long connection bridge is across footpath.
5. a job practices 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, carry out construction operation scope and protect logical work, according to plan construction task amount, raw material and the plant equipment of the being prepared in advance 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 cooperation manually marks the position that needs the anticollision barrier of removing and cut side bar frange plate and deck paving, also under bridge, to excision position, confirm simultaneously, guarantee that errorless rear line preparation indicates;
(3) excision anticollision barrier: first bore after hole for hoist on cut anticollision barrier, anticollision barrier is cut into pieces, so that lifting is removed;
(4) cut part old bridge side bar frange plate and deck paving: according to actual needs, at old bridge bridge floor, mark and cut accordingly line, cut accordingly the deck paving of part old bridge side bar frange plate and top thereof, and the reinforcing bar of reserved certain length is for welding with the reserved steel bar of adjacent new bridge side bar;
(5) bar planting: reinforcing bar is implanted in the web side to old bridge side bar 2 adjacent with new bridge side bar 4 within the scope of continuous splice sections, bar planting should meet the related request of < < highway bridge reinforcing design standard > > (JTG/T J22-2008) the 4th chapter with colloidality energy;
(6) reinforcing bar welding: first that reserved steel bar surface iron rust and the eliminating impurities of new bridge side bar within the scope of continuous splice sections is clean, then by the reserved steel bar welding of the reserved steel bar of old bridge side bar and bar planting reinforcing bar and new bridge side bar;
(7) build wet seam and the diaphragm concrete within the scope of continuous splice sections: reinforcing bar has welded, qualified after testing after, start to install wet seam and diaphragm template, first water will wet seam and diaphragm moistening, then start concreting;
(8) connecting elements within the scope of discrete splice sections is installed: for guarantee spelling 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, every a segment distance, connecting elements is together set;
(9) separation layer within the scope of discrete splice sections is installed: for guaranteeing the smooth realization of long connection bridge widening splicing construction provided by the present invention, separation layer is set above the old bridge side bar within the scope of discrete splice sections and new bridge side bar the new bridge floor in-situ layer at this position and new, old bridge girder is 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, to after date, can start overlap joint, the welding of new bridge floor in-situ layer reinforcing bar within the scope of continuous splice sections; Complete connecting elements to be installed and separation layer, and after qualified after testing, can start overlap joint, the welding of new bridge floor in-situ layer anticracking steel mesh reinforcement within the scope of discrete splice sections;
(11) build new bridge floor in-situ layer: above-mentioned new bridge floor in-situ layer reinforcing bar and anticracking steel mesh reinforcement arrange, qualified after testing after, start to build new bridge floor in-situ layer, casting method is with above-mentioned cast-in-place wet seam and diaphragm.
(12) lay waterproofing course: treat that the maintenance of above-mentioned new bridge floor in-situ layer, to after date, starts to lay waterproofing course;
(13) build new bridge deck pavement: treat that above-mentioned waterproofing course laid, qualified after testing after, 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, to after date, starts to install new bridge anticollision barrier and other ancillary facilities.
6. a kind of job practices of 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 job practices of growing connection bridge widening splicing construction according to claim 5, is characterized in that: in described step (7), the cast-in-place wet seam concrete used with diaphragm within the scope of splice sections should have that good between assurance new-old concrete is connected and the function of waterproofing and anti-leakage continuously.
8. a kind of job practices of growing connection bridge widening splicing construction according to claim 5, it is characterized in that: the material of the separation layer in described step (9) within the scope of discrete splice sections does not have special requirement, only need to guarantee the new bridge floor in-situ layer in discrete splice sections and new, old bridge girder is isolated.
9. a kind of job practices of 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 of setting 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 job practices of growing connection bridge widening splicing construction according to claim 5, is characterized in that: the new bridge floor in-situ layer concrete used in described step (11) within the scope of discrete splice sections should have water-proof function.
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| CN106351132A (en) * | 2016-11-16 | 2017-01-25 | 福州大学 | Bridge widening structure adopting corrugated steel sheet connecting parts and construction method thereof |
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| CN112281663A (en) * | 2020-10-21 | 2021-01-29 | 广东精特建设工程有限公司 | Construction method for widening connection of upper structures of new and old bridges |
| CN112502055A (en) * | 2020-12-08 | 2021-03-16 | 广州大学 | Temporary locking device and transverse splicing construction method for new and old main girders of bridge |
| CN113026522A (en) * | 2021-03-22 | 2021-06-25 | 北京市政建设集团有限责任公司 | Bridge steel box girder installation structure and construction process |
| CN113106879A (en) * | 2021-04-19 | 2021-07-13 | 华东交通大学 | Connecting structure for widening concrete box girder by steel box girder and construction method |
| 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 |
| CN116561860A (en) * | 2023-05-06 | 2023-08-08 | 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 |
| 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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