CN108978434A - A kind of Novel steel-is mixed to be combined Continuous Box Girder Bridge and its industrializes construction method without bracket - Google Patents
A kind of Novel steel-is mixed to be combined Continuous Box Girder Bridge and its industrializes construction method without bracket Download PDFInfo
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- CN108978434A CN108978434A CN201811201608.5A CN201811201608A CN108978434A CN 108978434 A CN108978434 A CN 108978434A CN 201811201608 A CN201811201608 A CN 201811201608A CN 108978434 A CN108978434 A CN 108978434A
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- 238000010276 construction Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 100
- 239000010959 steel Substances 0.000 claims abstract description 100
- 239000004567 concrete Substances 0.000 claims abstract description 62
- 238000005266 casting Methods 0.000 claims abstract description 9
- 230000010485 coping Effects 0.000 claims abstract description 3
- 238000009408 flooring Methods 0.000 claims description 15
- 239000011440 grout Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 241000357293 Leptobrama muelleri Species 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 4
- 238000007596 consolidation process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 239000011178 precast concrete Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of mixed combination Continuous Box Girder Bridges of Novel steel-, and the cushion cap including interval casting is mounted on support with the bridge pier being fixed on each cushion cap, each pier coping portion, and steel-is provided between adjacent two support and mixes combined box beam segment；Steel box girder segment is lifted at the top of each support, steel-mixes the binding site of combined box beam segment and steel box girder segment, its web and bottom plate use high-strength bolt+two-sided splice plate fillet weld connection structure, and top plate connection uses the steel cell compartment structure of fill concrete.Construction method is industrialized without bracket the invention also discloses the bridge.Entirety bridge structure of the present invention is reasonable, and main components can be prefabricated in advance, on-site consolidation, and site operation speed is fast, meets the development trend of bridge industrialized construction；Pier top uses steel box-girder, the structural advantages of the whole existing steel-concrete combination Continuous Box Girder Bridge of bridge, and can effectively overcome the problems, such as that hogging moment area stress is unreasonable near steel-concrete combination Continuous Box Girder Bridge fulcrum.
Description
Technical field
The present invention relates to highways and city road and bridge technical field, more particularly, to a kind of mixed combination continuous box girder of Novel steel-
Bridge industrializes construction method without bracket the invention further relates to the bridge.
Background technique
Steel-concrete combined box beam is a kind of novel beam knot to grow up on the basis of steel construction and concrete structure
Structure.Steel-concrete combined box beam structure upper is made of concrete slab, and lower part is made of steel box-girder, and the junction of the two is with cutting
Power connector such as WELDING STUDS is formed by connecting.It combines in beam section, concrete slab is mainly pressurized, the main tension of steel box-girder, Ke Yichong
It is divided to the respective advantage for reasonably playing steel and two kinds of materials of concrete, compared with steel bridge, there is saving steel, reduce building height
It spends, increases stability and globality, reduce impact coefficient, fatigue resistance height, reduce girder steel burn into reduction noise, maintenance is supported
Protect the advantages that workload is less；It is compared with concrete bridge, and with being self-possessed, small, anti-seismic performance is good, batch production degree is high, scene behaviour
Make less, speed of application it is fast, the advantages that short time limit.In the wide valued overall background of China's steel excess capacity, environmental issue at this stage
Under, steel-concrete combined box beam is increasingly becoming one because having many advantages, such as above-mentioned economy, structural reliability, convenience for construction
Kind development trend.
But in actual use, steel-concrete combination Continuous Box Girder Bridge hogging moment area near fulcrum can generate coagulation
The rough sledding that native tension, girder steel are pressurized, concrete slab is under the action of load, the temperature difference, shrinkage and creep herein, tensile stress
It is larger, it easily cracks, and then cause the reduction of combined box beam rigidity and the decline of durability.Currently, in order to control concrete bridge
Board cracking, be usually taken the pre- jack-block of preload system, support, floorings segmentation casting method, precast concrete floorings method,
Arrangement of reinforcement limits concrete crack width method, applies the measures such as electrothermal prestressing.Wherein, the pre- jack-block of preload system, support, bridge floor
Plate segmentation casting method, precast concrete floorings method need through construction means, or so that box beam is generated advantageous second inner force, or change
Kind floorings stress-less length, or floorings shrinkage and creep is reduced, but the working procedure of these methods is complicated, stress is not bright enough
Really, so not using usually or only being used as ancillary measure；Arrangement of reinforcement limits concrete crack width method and applies electrothermal prestressing
It is using more method in current engineering, arrangement of reinforcement limits concrete crack width method by matching in the concrete slab of hogging moment area
Enough reinforcing bars are set, the cracking of concrete slab is controlled with this, are limited in the fracture width of concrete slab within feasible value,
But this method can only play the role of control, improvement, floorings can not be avoided to crack completely；Apply electrothermal prestressing to pass through in group
It closes in the concrete slab of girder construction fulcrum hogging moment area and prestressed strand is set, provide certain pressure to concrete slab and answer
Power makes concrete at fulcrum keep pressured state to a certain extent effectively to control the tensile stress of concrete near fulcrum, with
Floorings are avoided to crack, but its steel beam that need to be arranged is more intensive, farther out apart from web, steel beam provides box beam to part steel beam
Precompression hysteresis effect is obvious, and the stress that steel beam quadratic effect generates is big, and steel beam service efficiency is low；In addition, its vertical, horizontal is pre-
Stress steel beam intensively arranges that construction is complicated with regular reinforcement, is not easy to vibrate, concrete pouring quality is poor, it is difficult to reach expected
Technical effect.
Summary of the invention
It is an object of the invention to for existing steel-concrete combination Continuous Box Girder Bridge fulcrum near hogging moment area structure by
The deficiency that power is unreasonable and existing the decking in the negative moment region crack Control Measures are ineffective provides a kind of mixed combination of Novel steel-and connects
Continuous box girder bridge industrializes construction method without bracket the present invention also provides the bridge.
To achieve the above object, the present invention can take following technical proposals:
The mixed combination Continuous Box Girder Bridge of Novel steel-of the present invention, including being spaced the cushion cap of casting and being fixedly placed in each hold
Bridge pier on platform is mounted on support at the top of each bridge pier, and steel-is provided between adjacent two support and mixes combined box beam segment；
It is lifted with steel box girder segment at the top of each support, the steel-mixes the knot of combined box beam segment and steel box girder segment
Position is closed, web and bottom plate use high-strength bolt+two-sided splice plate fillet weld connection structure, and top plate connection is using filling
The steel cell compartment structure of concrete.
The high-strength bolt+two-sided splice plate fillet weld connection structure includes being clamped in steel-to mix combined box beam segment and steel
Box girder segment web or the splicing steel plate of back plate connections two sides are spaced apart on the splicing steel plate and are equipped with connecting hole, described
High-strength connection bolt is fitted in connecting hole；The periphery of the splicing steel plate is by fillet weld seam with the web or bottom plate
One.
The connection of the cushion cap and bridge pier using grout sleeve+after pour the type of attachment of high strength and no shrinting cement slurry: pour
When cushion cap, embedded bar is stretched out at the top of cushion cap；Grout sleeve is embedded in bridge pier bottom when precast pier；When splicing, by institute
It states the embedded bar at the top of cushion cap to be inserted into the grout sleeve of the bridge pier bottom, and high strength and no shrinting is perfused in grout sleeve
Cement slurry makes the cushion cap and bridge pier form entirety.
The mixed combination Continuous Box Girder Bridge of Novel steel-of the present invention industrializes construction method without bracket are as follows:
Precast pier, steel box girder segment and steel-mix the concrete slab and flute profile girder steel in combined box beam segment first；In steel
The top plate junction setting of box girder segment is welded with the steel cell compartment of peg；Preformed groove is poured after opening up on prefabricated concrete slab,
The setting of channel-section steel back portion pours the connection peg that preformed groove matches with after；
Construction pile foundation support table, hoisting prefabricated bridge pier simultaneously erection support in place；
Steel box girder segment is successively lifted on the support of each pier coping portion；The mixed combination of steel-is lifted between adjacent two support
Flute profile girder steel in box girder segment completes steel box girder section using high-strength bolt+two-sided splice plate fillet weld connection structure after adjustment
The connection of web and bottom plate between section and flute profile girder steel；Last assembled prefabricated concrete bridge deck plate, and it is wet to be poured floorings
Seam and steel cell compartment concrete complete the integral construction of the mixed combination Continuous Box Girder Bridge of steel-.
The advantage of the invention is that whole bridge structure is reasonable, main components can be prefabricated in advance, and on-site consolidation, scene is applied
Work speed is fast, meets the development trend of bridge industrialized construction；Pier top (hogging moment area) uses steel box-girder, has whole bridge both
There are the structural advantages of steel-concrete combination Continuous Box Girder Bridge, and steel-concrete can effectively be overcome to combine Continuous Box Girder Bridge fulcrum
The unreasonable problem of neighbouring hogging moment area stress.Specifically:
1) good economy performance reduces bracket and template consumption, easy for construction, has saved construction cost；
2) stress performance is good, and pier top hogging moment area top plate uses steel (each pier top is all made of steel box girder segment), makes full use of
The examining tensile behavior of steel avoids arrangement pier top prestressed strand bring many adverse effects, fundamentally solves steel-
The problem of mixed combination beam pier top concrete cracking；
3) construction technology for using precast assembly, meets the industrialized development trend of bridge construction；Main components are in precasting yard
It is poured, conserved, can effectively ensure that construction quality；Cast-in-place concrete workload is smaller, and construction speed is fast, effectively shortens
Construction period；
4) social benefit is good, energy-saving consumption-reducing, and low-carbon environment-friendly is low in the pollution of the environment；Road not line-break under work progress jackshaft, to existing
Traffic impact is small.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the cross-section diagram of steel box girder segment in Fig. 1.
Fig. 3 is the cross-section diagram of steel-concrete combined box beam segment in Fig. 1.
Fig. 4 a is the cross-section diagram of precast concrete floorings in Fig. 3.
Fig. 4 b is the top view of Fig. 4 a.
Fig. 5 a is the cross-section diagram of pregroove marks section steel beam in Fig. 3.
Fig. 5 b is the top view of Fig. 5 a
Fig. 6 is the elevation of steel box girder segment and steel-concrete combined box beam segment connecting portion in Fig. 1.
Fig. 7 is the cross-section diagram of steel box girder segment and steel-concrete combined box beam segment connecting portion in Fig. 1.
Fig. 8 is the enlarged drawing of steel box girder segment and steel-concrete combined box beam segment connecting portion web, bottom plate in Fig. 1.
Fig. 9 is the cross-section diagram in Fig. 1 at bridge pier.
Figure 10 ~ Figure 14 is work progress figure of the invention.
Specific embodiment
As shown in Figure 1, the mixed combination Continuous Box Girder Bridge of Novel steel-of the present invention, cushion cap 1 including interval casting and solid
Dingan County is placed on the bridge pier 2 on each cushion cap 1, and the top of each bridge pier 2 is mounted on support 3, is provided between adjacent two support 3
Steel-mixes combined box beam segment 4；It is lifted with steel box girder segment 5 at the top of each support 3, mixes combined box beam segment 4 in steel-
With the binding site of steel box girder segment 5, tied between web and bottom plate using high-strength bolt+two-sided splice plate fillet weld connection
Structure, and top plate connection then uses the steel cell compartment structure of fill concrete.
The section structure of steel box girder segment 5 used in the present invention is as described in Figure 2, and steel-mixes the section knot of combined box beam segment 4
Structure is as shown in Figure 3；
The mixed combined box beam segment 4 of steel-is as precast concrete floorings 4.1(as shown in Fig. 4 a, Fig. 4 b) and pregroove marks section steel beam 4.2
(as shown in Fig. 5 a, Fig. 5 b) is spliced, and preformed groove 4.3, prefabricated U-steel are poured after being reserved on precast concrete floorings 4.1
Connection peg 4.4 is welded on beam 4.2.Stitching portion uses peg+rear pouring concrete connection type: by pregroove marks section steel beam
4.2 connection peg 4.4 pours in preformed groove 4.3 after protruding into precast concrete floorings 4.1, and preformed groove 4.3 is then poured after
In cast-in-place slightly expanded concrete, formed overall steel-mix combined box beam segment 4.
As shown in fig. 6, in its top plate junction, setting is welded with the steel cell compartment 5.2 of peg 5.1 when prefabricated steel box girder segment 5.
When jointing steel box girder segment 5 and steel-mix combined box beam segment 4, cast-in-place 5.2 inner concrete of steel cell compartment, by steel cell compartment 5.2
Peg 5.1 and the concrete of casting, the top plate for making steel box girder segment 5 and steel-mix combined box beam segment 4 are connected to become entirety；And
The connection that steel box girder segment 5 and steel-mix between the web and bottom plate of combined box beam segment 4 then uses high-strength bolt+two-sided splicing
Plate fillet weld connection structure 6, specific connection type is as shown in Figure 8: jointing steel box girder segment 5 and steel-mix combined box beam segment 4
When web and bottom plate, adds splicing steel plate 6.1 in web/back plate connections two sides, be spaced apart the company of being equipped on splicing steel plate 6.1
Hole is connect, high-strength connection bolt 6.2 is fitted in connecting hole；The periphery and web/bottom plate for splicing steel plate 6.1 pass through fillet weld 6.3
It is welded as a whole.The structure that the steel box girder segment 5 and steel-that assembly is completed mix combined box beam segment 4 is as shown in Figure 7.
Cushion cap 1 and bridge pier 2(are prefabricated in advance) connection can be used grout sleeve+after pour the connection of high strength and no shrinting cement slurry
Form, as shown in Figure 9: when pouring cushion cap 1, embedded bar 1.1 being stretched out into the top of cushion cap 1, by grout sleeve when precast pier 2
2.1 are embedded in 2 bottom of bridge pier, and embedded bar 1.1 is inserted into grout sleeve 2.1 by when splicing, and is perfused in grout sleeve 2.1
High strength and no shrinting cement slurry forms entirety.
The mixed combination Continuous Box Girder Bridge of Novel steel-of the present invention industrializes construction method without bracket are as follows:
The first step is poured reserved after being reserved on precasting yard precast pier 2, concrete slab 4.1(concrete slab 4.1
Slot 4.3), and store maintenance；Connection peg 4.4 is welded on production groove profile girder steel 4.2(groove profile girder steel 4.2) and steel box girder segment
When the prefabricated steel box girder segment 5 of 5(, in its top plate junction, setting is welded with the steel cell compartment 5.2 of peg 5.1)；
Second step, using conventional method construction bearing platform 1, embedded bar 1.1 stretches out 1 top of cushion cap upwards；Hoisting prefabricated bridge pier 2 is just
Position adjusts position, and the insertion of embedded bar 1.1 on cushion cap 1 is embedded in the grout sleeve 2.1 of 2 bottom of bridge pier, and is being in the milk
High strength and no shrinting cement slurry is perfused in sleeve 2.1, the two is made to form overall structure；Then in 2 top erection support 3 of bridge pier；It adopts
With Bridge Erector 7(or loop wheel machine) steel box girder segment 5 is lifted to support 3, as shown in Figure 10,11；
Third step, as shown in figure 12, using Bridge Erector 7(or loop wheel machine) hoisting prefabricated groove profile girder steel 4.2 in place, adjust position,
And locked with sunpender 8, the web and bottom plate of steel box girder segment 5 and groove profile girder steel 4.2 are connected, connection type can be used such as Fig. 8
Shown in high-strength bolt+two-sided splice plate fillet weld connection structure 6: add splicing steel plate in web/back plate connections two sides
6.1, it is spaced apart on splicing steel plate 6.1 and is equipped with connecting hole, be fitted with high-strength connection bolt 6.2 in connecting hole；Splice steel plate 6.1
Periphery and web/bottom plate be welded as a whole by fillet weld 6.3；
4th step, as shown in figure 13, hoisting prefabricated concrete slab 4.1 are in place, adjust position, connect precast concrete bridge floor
Plate 4.1 and pregroove marks section steel beam 4.2: using peg+rear pouring concrete connection type, by the company on pregroove marks section steel beam 4.2
It connects after peg 4.4 protrudes into concrete slab 4.1 and pours in preformed groove 4.3, cast-in-place microdilatancy in preformed groove 4.3 is then poured after
Concrete forms entirety.At the same time, steel box girder segment 5 is connected using the steel cell compartment steel cell compartment structure of fill concrete and is mixed
Solidifying soil floorings 4.1: the cast-in-place concrete in the steel cell compartment 5.2 of 5 top plate junction of steel box girder segment passes through the indoor bolt of steel lattice
Nail 5.1 and the concrete of casting make top plate be connected to become entirety.The wet joint concrete of casting floorings simultaneously conserves it, to
After concrete strength reaches requirement, sunpender 8 is removed, completes this hole steel-concrete combination Construction of Continuous Box Beam；
5th step lifts next hole slot section steel beam 4.2 as shown in figure 14, and is locked with sunpender 8, repeats to be formed Step 3: four
Multispan steel-concrete combines Continuous Box Girder Bridge.
Claims (4)
1. the mixed combination Continuous Box Girder Bridge of a kind of Novel steel-, including being spaced the cushion cap of casting and being fixedly placed on each cushion cap
Bridge pier is mounted on support at the top of each bridge pier, and steel-is provided between adjacent two support and mixes combined box beam segment；Its feature
It is: is lifted with steel box girder segment at the top of each support, the steel-mixes combined box beam segment and steel box girder segment
Binding site, web and bottom plate use high-strength bolt+two-sided splice plate fillet weld connection structure, and top plate connection uses
The steel cell compartment structure of fill concrete.
2. the mixed combination Continuous Box Girder Bridge of Novel steel-according to claim 1, it is characterised in that: the high-strength bolt+bis-
Face splice plate fillet weld connection structure includes being clamped in steel-to mix combined box beam segment and steel box girder segment web or back plate connections
The splicing steel plate of two sides is spaced apart on the splicing steel plate and is equipped with connecting hole, is fitted with high-strength connection spiral shell in the connecting hole
Bolt；The periphery of the splicing steel plate is integrated with the web or bottom plate by fillet weld seam.
3. the mixed combination Continuous Box Girder Bridge of Novel steel-according to claim 1, it is characterised in that: the cushion cap and bridge pier
Connection using grout sleeve+after pour the type of attachment of high strength and no shrinting cement slurry: when pouring cushion cap, embedded bar is stretched out into cushion cap
Top；Grout sleeve is embedded in bridge pier bottom when precast pier；When splicing, the embedded bar at the top of the cushion cap is inserted into institute
In the grout sleeve for stating bridge pier bottom, and high strength and no shrinting cement slurry, which is perfused, in grout sleeve forms the cushion cap and bridge pier
It is whole.
4. the mixed combination Continuous Box Girder Bridge of Novel steel-described in claim 1 industrializes construction method without bracket, it is characterised in that:
Precast pier, steel box girder segment and steel-mix the concrete slab and flute profile girder steel in combined box beam segment first；In steel
The top plate junction setting of box girder segment is welded with the steel cell compartment of peg；Preformed groove is poured after opening up on prefabricated concrete slab,
The setting of channel-section steel back portion pours the connection peg that preformed groove matches with after；
Construction pile foundation support table, hoisting prefabricated bridge pier simultaneously erection support in place；
Steel box girder segment is successively lifted on the support of each pier coping portion；The mixed combination of steel-is lifted between adjacent two support
Flute profile girder steel in box girder segment completes steel box girder section using high-strength bolt+two-sided splice plate fillet weld connection structure after adjustment
The connection of web and bottom plate between section and flute profile girder steel；Last assembled prefabricated concrete bridge deck plate, and it is wet to be poured floorings
Seam and steel cell compartment concrete complete the integral construction of the mixed combination Continuous Box Girder Bridge of steel-.
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| CN201811201608.5A CN108978434B (en) | 2018-10-16 | 2018-10-16 | Bracket-free industrialized construction method of steel-concrete combined continuous box girder bridge |
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| CN201811201608.5A CN108978434B (en) | 2018-10-16 | 2018-10-16 | Bracket-free industrialized construction method of steel-concrete combined continuous box girder bridge |
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| CN108978434B CN108978434B (en) | 2024-02-20 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505269A (en) * | 2019-01-10 | 2019-03-22 | 郑州铁路职业技术学院 | Load reinforcement means is significantly mentioned for existing steel plate combination continuous bridge |
| CN110258353A (en) * | 2019-07-31 | 2019-09-20 | 河南省交通规划设计研究院股份有限公司 | And of Varying Depth steel-concrete composite beams bridge construction technique with support |
| CN111021227A (en) * | 2019-11-29 | 2020-04-17 | 东南大学 | Steel-concrete composite structure continuous box girder and manufacturing method thereof |
| CN111254836A (en) * | 2020-02-18 | 2020-06-09 | 中交路桥建设有限公司 | Site assembling and bridge girder erection machine erecting construction method for large-span steel-concrete composite beam in mountainous area |
| CN111910500A (en) * | 2020-02-21 | 2020-11-10 | 清华大学 | Anti-overturning combined bridge and construction method |
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