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 PDF

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Publication number
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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China
Prior art keywords
steel
bridge
box girder
segment
plate
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Pending
Application number
CN201811201608.5A
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Chinese (zh)
Inventor
李华强
岳建光
冯智楷
颜浩杰
李大杰
张毅
邓稳平
张二辉
王庆丰
范磊
刘大为
史海涛
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Henan Provincial Communication Planning and Design Institute Co Ltd
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Henan Provincial Communication Planning and Design Institute Co Ltd
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Application filed by Henan Provincial Communication Planning and Design Institute Co Ltd filed Critical Henan Provincial Communication Planning and Design Institute Co Ltd
Priority to CN201811201608.5A priority Critical patent/CN108978434A/en
Publication of CN108978434A publication Critical patent/CN108978434A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/268Composite concrete-metal

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

A kind of Novel steel-is mixed to be combined Continuous Box Girder Bridge and its industrializes construction method without bracket
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-.
CN201811201608.5A 2018-10-16 2018-10-16 A kind of Novel steel-is mixed to be combined Continuous Box Girder Bridge and its industrializes construction method without bracket Pending CN108978434A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
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
CN112112074A (en) * 2020-08-18 2020-12-22 中铁九局集团第四工程有限公司 Method for sectional construction of unsupported large-span hyperbolic span urban viaduct steel box girder

Cited By (7)

* Cited by examiner, † Cited by third party
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
CN109505269B (en) * 2019-01-10 2020-05-05 郑州铁路职业技术学院 Large-amplitude lifting and reinforcing method for existing steel plate combined continuous beam 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
CN111021227B (en) * 2019-11-29 2021-06-01 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
CN112112074A (en) * 2020-08-18 2020-12-22 中铁九局集团第四工程有限公司 Method for sectional construction of unsupported large-span hyperbolic span urban viaduct steel box girder

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