CN112709139A - Construction method for closure section of main bridge continuous beam - Google Patents
Construction method for closure section of main bridge continuous beam Download PDFInfo
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- CN112709139A CN112709139A CN202011535733.7A CN202011535733A CN112709139A CN 112709139 A CN112709139 A CN 112709139A CN 202011535733 A CN202011535733 A CN 202011535733A CN 112709139 A CN112709139 A CN 112709139A
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- construction
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- hanging
- folding
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- 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
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- 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
- E01D21/10—Cantilevered erection
-
- 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
- E01D21/10—Cantilevered erection
- E01D21/105—Balanced cantilevered erection
Abstract
The invention relates to the technical field of building construction, and discloses a main bridge continuous beam closure segment construction method, which comprises side span closure segment construction, mid-span closure segment construction and secondary side span closure segment construction, wherein the main bridge continuous beam closure segment construction method comprises the following steps: folding the side span closure segment, then folding the mid-span closure segment, and finally folding the secondary side span closure segment, wherein the construction sequence of the side span closure segment, the construction sequence of the mid-span closure segment and the construction sequence of the secondary side span closure segment are the same; the construction sequence of the closure segment comprises the following steps: and moving one hanging basket on the cantilever beam of the folding section backwards, and changing the other hanging basket into a hanging bracket. According to the construction method for the closure section of the main bridge continuous beam, the balance weight water tank carries out synchronous equivalent water drainage when the concrete of the closure section is poured, so that the stability of the cantilever section can be effectively kept, the closure section is formed by refitting the closure hanging bracket by adopting a single hanging basket, the main longitudinal beam, the upper cross beam and a rear anchoring system are kept to form the hanging bracket, the construction time is conveniently shortened, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for a closure section of a main bridge continuous beam.
Background
In the existing main bridge continuous beam construction process, the side span closure section and the mid-span closure section support systems all adopt a hanger process, the bottom elevation and the plane position of a bottom web template and a flange plate template are not easy to control in construction, the construction precision and the whole line type of a bridge cannot be ensured, the stability is low, in addition, the hanger process system and the side span cast-in-place section support cannot be simultaneously erected, the bottom web template and the flange plate template cannot be simultaneously installed with the side span cast-in-place section, and the construction efficiency is reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a construction method for the closure section of the main bridge continuous beam, which has the advantages of good stability and high construction efficiency and solves the problems of poor stability and low construction efficiency of the cantilever section in the construction process of the main bridge continuous beam in the prior art.
(II) technical scheme
In order to achieve the purposes of good stability and high construction efficiency, the invention provides the following technical scheme: a main bridge continuous beam closure segment construction method comprises side span closure segment construction, mid-span closure segment construction and secondary side span closure segment construction, and comprises the following steps: folding the side span closure segment, then folding the mid-span closure segment, and finally folding the secondary side span closure segment, wherein the construction sequence of the side span closure segment, the construction sequence of the mid-span closure segment and the construction sequence of the secondary side span closure segment are the same;
the construction sequence of the closure segments comprises the following steps:
s1: moving one hanging basket on the cantilever beam of the folding section backwards, and changing the other hanging basket into a hanging bracket;
s2: adding a balance weight water tank at two ends of the cantilever beam, and injecting water into the balance weight water tank;
s3: welding a stiff framework at the folding position;
s4: binding a bottom plate, a web plate steel bar and a bottom plate corrugated pipe;
s6: binding a top plate, a web plate steel bar and a transverse corrugated pipe;
s7: pouring closure section concrete and preserving;
s8: and tensioning the bottom plate steel bundles and the top plate steel bundles of the closure segment.
Preferably, the step S1 of changing the cradle into the hanger includes the following steps:
1, preparing equipment, preparing side templates and various tools for changing hanging baskets into hanging frames;
a2, changing a hanging basket into a folding hanging bracket, withdrawing the hanging basket at one side to the vicinity of a pier after the hanging basket suspension casting construction is finished, and then installing a hanging strip through a preformed hole at the bridge side span cast-in-place section, and connecting the bottom of the hanging strip with the bottom of the side end of the non-moving hanging basket;
a3, adjusting the angle of the closed cradle bottom basket, and adjusting the length of the hanging strip on the basis of the step a2 to adjust the angle of the cradle bottom basket beam frame;
a4, dismantling the main truss, namely dismantling the main truss and the walking part at the top of the hanging basket, wherein the dismantling sequence is opposite to the installation sequence of the main truss at the top of the hanging basket;
a5, installing templates, namely installing side templates on the bottom templates of the closed hanger bottom basket in the step a 2;
and a6, performing a folding hanger loading test, wherein the folding hanger pre-pressing adopts a water tank pre-pressing method, the steps of the folding hanger loading test are the same as those of the hanging basket loading test, and finally binding steel bars and pouring concrete in the template.
Preferably, the water containing weight effect of the counterweight water tank at the two ends of the cantilever beam of the closure section in the step S2 is equivalent to the effect of the weight of the concrete poured in the closure section in the step S7.
Preferably, in step S7, the water tank is weighed during the concrete pouring process to discharge water synchronously and equivalently.
Preferably, the floor steel bundles and the roof steel bundles of the closure segment are tensioned after the concrete poured in the step S7 reaches the design strength of 90% and the age of the concrete reaches 5 days.
Preferably, the construction temperature of the closure section is 12 ℃.
Preferably, the stiff framework in step S3 is an external stiff framework made of 32a i-steel.
Preferably, in the step a6, in the folding hanger loading test process, a prepressing observation point is made on a hanging basket bottom die before prepressing, the prepressing is symmetrically loaded step by step according to 20% P, 50% P, 80% P, 100% P and 120% P, the elevation of each point is measured before stacking, then water is added, when the load is loaded to 20%, 50% and 80% of load, deformation observation is carried out after static pressure is loaded for half an hour for each step, the elevation change of the measurement point is observed and recorded, the elevation change is observed when the load is continuously loaded to 100% of load, the elevation change is observed when the load is loaded to 110% and observed, the observation is carried out once every 11 hours within 33 hours, finally, the observation is carried out once within 72 hours, when the difference of the observation average value of prepressing settlement is not more than 1mm, the hanger prepressing is considered to be stable, the unloading is symmetrically unloaded step by step according to 120% P, 100% P, 80% P, and summarizing all the previously measured elevations, calculating the elastic deformation and the inelastic deformation of each point, and providing the elastic deformation and the inelastic deformation for a monitoring unit to provide a basis for the elevation of the vertical mold.
(III) advantageous effects
Compared with the prior art, the invention provides a construction method of a closure section of a main bridge continuous beam, which has the following beneficial effects:
1. according to the construction method for the closure section of the main bridge continuous beam, the balance weight water tank synchronously discharges water in equal amount when the concrete of the closure section is poured, so that the stability of the cantilever section can be effectively kept, the closure section is formed by modifying a single hanging basket into a closure hanging bracket, the hanging basket is modified into the hanging bracket, the bottom platform and a suspension system are basically unchanged, the structure of an upper main beam is modified, the main longitudinal beam, the upper transverse beam and a rear anchoring system are reserved to form the hanging bracket, the construction time is conveniently shortened, and the construction efficiency is improved.
2. According to the construction method of the closure section of the continuous beam of the main bridge, after the suspension basket suspension casting construction is finished, the suspension basket on one side is retracted to the position near the pier, the suspension basket on the other side is not retracted, then the suspension belt is installed in the hole reserved in the bridge side span cast-in-place section, the bottom of the suspension belt is connected with the bottom of the side end of the unmovable suspension basket, the suspension basket is changed into the suspension frame, the bottom platform and the suspension system are basically unchanged, only the upper girder structure is modified, the main longitudinal beam, the upper beam and the rear anchoring system are reserved to form the suspension frame, the suspension frame is changed into the suspension frame without lifting and transporting suspension frame closure materials, time and labor are saved, the convenience and the efficiency of bridge construction are improved, the utilization rate of the suspension basket system is improved, the increase of bridge construction cost caused by purchasing the closure frame again is avoided, and the method for.
Detailed Description
The invention discloses a construction method for a closure section of a main bridge continuous beam, which can be realized by appropriately improving process parameters by taking the contents of the text as reference by a person skilled in the art. It is expressly intended that all such similar substitutes and modifications which would be obvious to one skilled in the art are deemed to be included in the invention. While the construction method of the present invention has been described in terms of preferred embodiments, it will be apparent to those skilled in the art that the techniques of the present invention may be practiced and applied by modifying or appropriately changing or combining the construction methods described herein without departing from the spirit, scope, and spirit of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The invention is further illustrated by the following examples.
A construction method of a main bridge continuous beam closure segment comprises side span closure segment construction, mid-span closure segment construction and secondary side span closure segment construction, and the construction method of the main bridge continuous beam closure segment comprises the following steps: folding the side span closure segment, then folding the mid-span closure segment, and finally folding the secondary side span closure segment, wherein the folding temperature is 12 ℃, the folding time is selected at the moment with small temperature change in one day, and the side span closure segment construction, the mid-span closure segment construction and the secondary side span closure segment construction are in the same sequence;
the construction sequence of the closure segment comprises the following steps:
s1: moving back one hanging basket on the cantilever beam of the closure section, changing the other hanging basket into a hanging bracket, withdrawing one hanging basket to the vicinity of a pier after the hanging basket suspension casting construction is finished, adopting a single hanging basket to refit the closure section into a hanging bracket, needing to ensure that a bottom platform and a suspension system are basically unchanged by changing the hanging basket into the hanging bracket, only reforming the structure of an upper main beam, and reserving a main longitudinal beam, an upper transverse beam and a rear anchoring system to form the hanging bracket;
s2: adding balance weight water tanks at two ends of the cantilever beam, and injecting water into the balance weight water tanks, wherein the water containing weight effect of the water tanks at two sides of the closure segment is equivalent to the effect of the weight of concrete poured in the closure segment, and the weight of a half hanger template is added at the far end;
s3: welding a stiff framework at the closure position, wherein the stiff framework adopts a 32a I-steel external stiff framework, one end of the stiff framework is welded before casting concrete at the closure section, the other end meets the design requirement, the external stiff framework can be formed by welding when the design closure temperature is up to 12 ℃,
s4: binding a bottom plate, a web plate steel bar and a bottom plate corrugated pipe;
s6: binding a top plate, a web plate steel bar and a transverse corrugated pipe;
s7: pouring closure section concrete and maintaining, wherein a counterweight water tank carries out synchronous equivalent water drainage in the concrete pouring process, in order to reduce the influence of unbalanced self weight in the box girder suspension pouring process, the self weight error of the box girder is required to be controlled within 3 percent, the concrete pouring of each girder section is carried out simultaneously, the maximum poured concrete weight difference is not more than 30 percent of the self weight of the girder section, the concrete pouring selects a time period with small temperature change in one day, all the concrete is poured within 2 to 3 hours, the pouring sequence is that a bottom plate, a web plate and a top plate are poured, in order to prevent the bottom plate from turning over slurry when the web plate concrete is poured, a pressing plate is adopted for pressure pouring, the concrete is required to be reinforced and tamped, particularly, the concentrated part of the corrugated pipe of the bottom plate and the inner and outer parts of a stiff framework are more fully tamped and compacted, and the horizontal outer surface is covered by sponge and geotextile, firstly hanging geotextile on the vertical outer surface, then wrapping the geotextile with a plastic film, pouring concrete in a box chamber, wetting an indoor template after final setting, adding a few centimeters of water on the horizontal concrete surface, plugging a manhole, avoiding air convection, keeping the indoor template warm and moist, and continuously spraying water for curing for 14 days after 5 days of warm and moist curing;
s8: and after the poured concrete reaches the designed strength of 90 percent and the age of the concrete reaches 5 days, tensioning the bottom plate steel bundles and the top plate steel bundles of the closure segment, reducing the sunshine temperature difference of the box girder cantilever before tensioning the steel bundles of the closure segment, taking measures of covering the box girder cantilever to reduce the temperature difference, and paying attention to heat preservation and moisture preservation maintenance to prevent the concrete from cracking.
The step of changing the cradle into the hanging bracket in the step S1 comprises the following steps:
1, preparing equipment, preparing side templates and various tools for changing hanging baskets into hanging frames;
a2, changing a hanging basket into a folding hanging bracket, withdrawing the hanging basket at one side to the vicinity of a pier after the hanging basket suspension casting construction is finished, and then installing a hanging strip through a preformed hole at the bridge side span cast-in-place section, and connecting the bottom of the hanging strip with the bottom of the side end of the non-moving hanging basket;
a3, adjusting the angle of the closed cradle bottom basket, and adjusting the length of the hanging strip on the basis of the step a2 to adjust the angle of the cradle bottom basket beam frame;
a4, dismantling the main truss, namely dismantling the main truss and the walking part at the top of the hanging basket, wherein the dismantling sequence is opposite to the installation sequence of the main truss at the top of the hanging basket;
a5, installing templates, namely installing side templates on the bottom templates of the closed hanger bottom basket in the step a 2;
6, a folding hanger loading test, wherein the folding hanger prepressing adopts a water tank prepressing method, the steps of the folding hanger loading test are the same as those of a hanging basket loading test, finally, steel bars and concrete are bound in a template, a prepressing observation point is made on a hanging basket bottom die before prepressing in the folding hanger loading test process, prepressing is symmetrically loaded step by step according to 20 percent P, 50 percent P, 80 percent P, 100 percent P and 120 percent P, the elevation of each point is measured before piling, then water is added, deformation observation is carried out after each stage of static pressure loading is completed for half an hour when the load is up to 20 percent, 50 percent and 80 percent, elevation changes of a measuring point are observed and recorded, elevation changes are observed when the load is up to 100 percent, after the load is up to 110 percent and the observation, the observation is carried out once every 11 hours in 33 hours, the observation is carried out for the last 72 hours, and the difference of the average, considering that the pre-pressing of the hanger is stable, unloading is carried out symmetrically step by step according to 120% P, 100% P, 80% P, 50% P and 20% P, the elevation of the pre-pressing observation point is measured after unloading, the measured elevation is summarized, the elastic deformation and the inelastic deformation of each point are calculated and provided for a monitoring unit, and a basis is provided for the elevation of the vertical mold.
In conclusion, according to the construction method for the closure section of the continuous beam of the main bridge, when concrete at the closure section is poured, the balance weight water tank carries out synchronous and equivalent water drainage, so that the stability of the cantilever section can be effectively kept, the closure section adopts a single hanging basket to refit a closure hanger, the hanging basket needs to be changed into the hanger to ensure that a bottom platform and a suspension system are basically unchanged, only the structure of an upper main beam is modified, and a main longitudinal beam, an upper transverse beam and a rear anchoring system are reserved to form the hanger, so that the construction time is conveniently shortened, and the construction efficiency is improved; after the hanging basket suspension casting construction is finished, the hanging basket on one side is moved back to the position near a pier, the hanging basket on the other side does not move back, then a hanging strip is installed in a reserved hole of a bridge side span cast-in-place section, the bottom of the hanging strip is connected with the bottom of the side end of the unmovable hanging basket, the hanging basket is changed into a hanging frame, a bottom platform and a suspension system are basically unchanged, only the upper girder structure is changed, a main longitudinal beam, an upper transverse beam and a rear anchoring system are kept to form the hanging frame, the hanging basket is changed into the hanging frame without folding the hanging frame materials, time and labor are saved, the convenience and the efficiency of bridge construction are improved, the utilization rate of the hanging basket system is improved, the increase of bridge construction cost caused by re-purchasing the folding hanging frame is avoided, and the method for changing the hanging basket into.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A main bridge continuous beam closure section construction method comprises side span closure section construction, mid-span closure section construction and secondary side span closure section construction, and is characterized in that: the construction method of the closure section of the main bridge continuous beam comprises the following steps: folding the side span closure segment, then folding the mid-span closure segment, and finally folding the secondary side span closure segment, wherein the construction sequence of the side span closure segment, the construction sequence of the mid-span closure segment and the construction sequence of the secondary side span closure segment are the same;
the construction sequence of the closure segments comprises the following steps:
s1: moving one hanging basket on the cantilever beam of the folding section backwards, and changing the other hanging basket into a hanging bracket;
s2: adding a balance weight water tank at two ends of the cantilever beam, and injecting water into the balance weight water tank;
s3: welding a stiff framework at the folding position;
s4: binding a bottom plate, a web plate steel bar and a bottom plate corrugated pipe;
s6: binding a top plate, a web plate steel bar and a transverse corrugated pipe;
s7: pouring closure section concrete and preserving;
s8: and tensioning the bottom plate steel bundles and the top plate steel bundles of the closure segment.
2. The construction method of the main bridge continuous beam closure section according to claim 1, characterized in that: the step of changing the hanging basket into the hanging bracket in the step S1 comprises the following steps:
1, preparing equipment, preparing side templates and various tools for changing hanging baskets into hanging frames;
a2, changing a hanging basket into a folding hanging bracket, withdrawing the hanging basket at one side to the vicinity of a pier after the hanging basket suspension casting construction is finished, and then installing a hanging strip through a preformed hole at the bridge side span cast-in-place section, and connecting the bottom of the hanging strip with the bottom of the side end of the non-moving hanging basket;
a3, adjusting the angle of the closed cradle bottom basket, and adjusting the length of the hanging strip on the basis of the step a2 to adjust the angle of the cradle bottom basket beam frame;
a4, dismantling the main truss, namely dismantling the main truss and the walking part at the top of the hanging basket, wherein the dismantling sequence is opposite to the installation sequence of the main truss at the top of the hanging basket;
a5, installing templates, namely installing side templates on the bottom templates of the closed hanger bottom basket in the step a 2;
and a6, performing a folding hanger loading test, wherein the folding hanger pre-pressing adopts a water tank pre-pressing method, the steps of the folding hanger loading test are the same as those of the hanging basket loading test, and finally binding steel bars and pouring concrete in the template.
3. The construction method of the main bridge continuous beam closure section according to claim 1, characterized in that: the water containing weight effect of the counterweight water tanks at the two ends of the cantilever beam of the closure segment in the step S2 is equivalent to the weight effect of the concrete poured in the closure segment in the step S7.
4. The construction method of the main bridge continuous beam closure section according to claim 1, characterized in that: and step S7, water is synchronously discharged in equal amount by the counterweight water tank in the concrete pouring process.
5. The construction method of the main bridge continuous beam closure section according to claim 1, characterized in that: and (5) tensioning the closure section bottom plate steel bundle and the top plate steel bundle after the concrete poured in the step S7 reaches the design strength of 90% and the age of the concrete reaches 5 days.
6. The construction method of the main bridge continuous beam closure section according to claim 1, characterized in that: the construction temperature of the closure section is 12 ℃.
7. The construction method of the main bridge continuous beam closure section according to claim 1, characterized in that: and the stiff framework in the step S3 is an external stiff framework made of 32a I-steel.
8. The construction method of the main bridge continuous beam closure section according to claim 2, characterized in that: in the step a6, a prepressing observation point is made on a hanging basket bottom die before prepressing in the folding hanger loading test process, the prepressing is symmetrically loaded step by step according to 20 percent P, 50 percent P, 80 percent P, 100 percent P and 120 percent P, the elevation of each point is measured before stacking, then water is added, when the load is loaded to 20 percent, 50 percent and 80 percent of load, deformation observation is carried out after static pressure is loaded for half an hour for each step, the elevation change of the measurement point is observed and recorded, the elevation change is observed when the load is continuously loaded to 100 percent of load, after the load is loaded to 110 percent and observation is carried out, observation is carried out once every 11 hours within 33 hours, finally, observation is carried out once within 72 hours, when the difference of the observation average value of prepressing settlement is not more than 1mm, the hanger prepressing is considered to be stable, the unloading is symmetrically unloaded step by step according to 120 percent P, 100 percent P, 80 percent P, and summarizing all the previously measured elevations, calculating the elastic deformation and the inelastic deformation of each point, and providing the elastic deformation and the inelastic deformation for a monitoring unit to provide a basis for the elevation of the vertical mold.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502745A (en) * | 2021-06-28 | 2021-10-15 | 中铁一局集团(广州)建设工程有限公司 | Bottom protection anti-collision device for existing line crossing continuous beam hanging basket construction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000045230A (en) * | 1998-07-30 | 2000-02-15 | Taisei Corp | Closing method for closing part in pc bridge cantilever overhang erection work |
| CN102493362A (en) * | 2011-11-24 | 2012-06-13 | 中铁二十三局集团有限公司 | Construction method for midspan closure segment of longspan continuous rigid frame bridge |
| CN110172927A (en) * | 2019-07-09 | 2019-08-27 | 招商局重庆交通科研设计院有限公司 | The span centre of prestressed concrete continuous beam and continuous rigid frame closes up section constructing method |
| CN111395180A (en) * | 2020-03-27 | 2020-07-10 | 中交二公局东萌工程有限公司 | Continuous rigid frame bridge side span cast-in-place section and closure section suspension type construction method |
| CN111893889A (en) * | 2020-07-15 | 2020-11-06 | 杭州市市政工程集团有限公司 | Main bridge closure section construction method |
| CN111926720A (en) * | 2020-08-12 | 2020-11-13 | 中建七局交通建设有限公司 | Construction method suitable for continuous steel-structure cantilever beam closure in loess area |
-
2020
- 2020-12-23 CN CN202011535733.7A patent/CN112709139A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000045230A (en) * | 1998-07-30 | 2000-02-15 | Taisei Corp | Closing method for closing part in pc bridge cantilever overhang erection work |
| CN102493362A (en) * | 2011-11-24 | 2012-06-13 | 中铁二十三局集团有限公司 | Construction method for midspan closure segment of longspan continuous rigid frame bridge |
| CN110172927A (en) * | 2019-07-09 | 2019-08-27 | 招商局重庆交通科研设计院有限公司 | The span centre of prestressed concrete continuous beam and continuous rigid frame closes up section constructing method |
| CN111395180A (en) * | 2020-03-27 | 2020-07-10 | 中交二公局东萌工程有限公司 | Continuous rigid frame bridge side span cast-in-place section and closure section suspension type construction method |
| CN111893889A (en) * | 2020-07-15 | 2020-11-06 | 杭州市市政工程集团有限公司 | Main bridge closure section construction method |
| CN111926720A (en) * | 2020-08-12 | 2020-11-13 | 中建七局交通建设有限公司 | Construction method suitable for continuous steel-structure cantilever beam closure in loess area |
Non-Patent Citations (3)
| Title |
|---|
| 施菁华: "大跨径连续刚构桥合龙顶推力关键技术", 《筑路机械与施工机械化》 * |
| 沪昆铁路客运专线浙江有限责任公司: "《沪昆铁路客运专线浙江段工程总结 下》", 31 January 2019 * |
| 王敏峰: "三岔河特大桥连续刚构上部合龙段施工技术探讨", 《交通建设与管理》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502745A (en) * | 2021-06-28 | 2021-10-15 | 中铁一局集团(广州)建设工程有限公司 | Bottom protection anti-collision device for existing line crossing continuous beam hanging basket construction |
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Inventor after: Wang Qunying Inventor after: Chen Yaohua Inventor after: Li Jiguang Inventor before: Wang Qunying |