WO2022151827A1

WO2022151827A1 - Pier top swivel method for continuous steel truss

Info

Publication number: WO2022151827A1
Application number: PCT/CN2021/130364
Authority: WO
Inventors: 徐升桥; 彭岚平; 高静青; 李艳明; 杨永明; 高策; 金正凯; 李先婷
Original assignee: 中铁工程设计咨询集团有限公司
Priority date: 2021-01-14
Filing date: 2021-11-12
Publication date: 2022-07-21
Also published as: CN112854020A; CN112854020B

Abstract

A pier top swivel method for a continuous steel truss, comprising: performing cantilever assembly on a continuous steel truss on a pier top of a swivel pier (1) until a maximum cantilever state; swiveling the continuous steel truss to a preset position of a bridge; temporarily locking the continuous steel truss using a temporary support (7); installing a mid-span closure segment and a side-span post-assembly segment of the continuous steel truss; and installing a permanent support (10) below the continuous steel truss. According to the method, the temporary support (7) is provided on the pier top, supporting feet (9) and reinforcing cross struts (4, 51, 52) cooperate to disperse and reduce the concentrated stress condition of the steel truss, the problems that local rods of the steel truss are subjected to large stress and a joint structure is difficult to design are solved, thereby ensuring the pier top swivel of a continuous steel truss.

Description

A kind of continuous steel truss girder pier top rotation method

technical field

The present invention relates to the technical field of bridge construction, and in particular, to a XX method, device, equipment and readable storage medium.

Background technique

The swivel method construction refers to a construction method in which the bridge structure is fabricated (pouring or splicing) at a non-design axis position and then placed in place by swivel. The swivel bridge mostly adopts the pier bottom swivel construction method. However, the continuous steel truss girders constitute a large bridge body, and the use of pier bottom swivel will lead to an increase in the weight of the swivel body, the volume of the turntable, the upper and lower spherical hinges, and the size of the foundation and the number of protection works. The main span is also increased accordingly. Therefore, a swivel construction method of continuous steel truss girder is urgently needed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a continuous steel truss girder pier top rotation method to improve the above problems. In order to achieve the above object, the technical scheme adopted by the present invention is as follows:

The application provides a method for rotating a continuous steel truss girder pier top. position; temporarily lock the continuous steel truss girder with temporary supports; install the mid-span closure section and side span rear segment of the continuous steel truss girder; install permanent supports under the continuous steel truss girder.

Further, the assembling of the continuous steel truss girder on the top of the swivel pier until the maximum cantilever state includes: obtaining a construction plan and the position information of the swivel pier; extracting the continuous steel truss in the construction plan The position information of all the reinforcement cross braces of the beam before the rotation; according to the position information of the rotation pier and the position information of all the reinforcement cross braces before the rotation, two temporary piers are arranged beside the rotation pier, Each of the temporary piers is located under one of the reinforcing transverse braces before the swivel, and the two temporary piers are located on both sides of the swivel pier respectively; according to the position information of the swivel pier and all the According to the position information of the reinforcement cross brace before turning, at least one temporary support is respectively arranged on the pier top of the swivel pier and the pier top of the temporary pier, and each temporary support is located on the continuous steel truss girder Under the main girder; in the case of the cooperation of the crane, the continuous steel truss girder is suspended and assembled under the temporary support support until the continuous steel truss girder reaches the maximum cantilever state.

Further, the continuous steel truss girder includes a first reinforcing cross brace, a second reinforcing cross brace and a third reinforcing cross brace, and the third reinforcing cross brace is located at the first reinforcing cross brace and the third reinforcing cross brace. Between the piers, the third reinforcement is located above the swivel pier, and the first reinforcement transverse brace and the second reinforcement transverse brace are respectively located above the two temporary piers; At least one temporary support is respectively provided on the pier top of the body pier and the pier top of the temporary pier, including: extending the first reinforcing cross brace and the third reinforcing cross brace one end protruding from the continuous steel truss girder. The corbel cross brace formed on the outside of the main truss, the corbel cross brace of the first reinforcing cross brace and the corbel cross brace of the third reinforcing cross brace are all located on the same side of the main truss of the continuous steel truss beam; Temporary supports are respectively provided under the two corbel cross braces and the three first nodes, and the first nodes are respectively located at the first reinforcing cross brace, the second reinforcing cross brace and the third reinforcing cross brace and the main girders At the connection point, all the first nodes are located on the side of the main girder away from the corbel cross brace.

Further, the rotating the continuous steel truss girder to the preset position of the bridge includes: installing rotating equipment and support feet on the rotating pier and the two temporary piers, the rotating equipment Including a spherical hinge, the spherical hinge is arranged on the swivel pier, the support feet are at least three, and the supporting feet are respectively arranged on the swivel pier and the two temporary piers; lower all the the height of the temporary supports until the continuous steel girders are dropped onto the ball hinges; all the temporary supports are removed.

Further, the spherical hinge is arranged on the swivel pier, including: if the continuous steel truss girder is a straight beam, the spherical hinge is arranged at the center of the reinforcing transverse brace of the continuous steel truss girder; If the continuous steel truss girder is a curved girder, the spherical hinge is arranged below the reinforcing cross brace corresponding to the position of the center of gravity of the continuous steel truss girder.

Further, the supporting feet are respectively arranged on the swivel pier and the two temporary piers, including: the supporting feet are arranged in a circle with the spherical hinge as the center.

Further, the continuous steel truss girder includes a first reinforcing cross brace, a second reinforcing cross brace and a third reinforcing cross brace, and the third reinforcing cross brace is located at the first reinforcing cross brace and the third reinforcing cross brace. Between the braces, the third reinforcement cross is located above the swivel pier, the first reinforcement cross brace and the second reinforcement cross brace are respectively located above the two temporary piers, wherein the support feet They are respectively arranged on the swivel pier and the two temporary piers, and include: extending the first reinforcing cross brace, the second reinforcing cross brace and the third reinforcing cross brace one end protruding from the The corbel cross brace formed on the outer side of the main truss of the continuous steel truss girder; if the continuous steel truss girder is a straight beam, at the two second nodes, the first reinforcing cross brace and the third reinforcing cross brace A support foot is provided at the joint point between the corbel cross brace and the second reinforcing cross brace and the main girder, and the support foot presents a circular arrangement with the spherical hinge as the center, and the first node They are respectively located at the junction points of the first reinforcing transverse brace and the third reinforcing transverse brace and the main girder, and each of the first nodes is located on the side of the main girder away from the corbel cross brace; if the continuous steel girder If the beam is a curved beam, the corbel cross brace is located on the inner side of the curve of the continuous steel truss girder, and at the two second nodes, the corbel cross brace of the second reinforcing cross brace, and the first reinforcing cross brace , a support foot is arranged under the second reinforcement cross brace and the third reinforcement cross brace, the support foot is arranged in a circle with the spherical hinge as the center, and the second nodes are located at the first and second nodes respectively. Where the reinforcing cross brace and the third reinforcing cross brace are connected with the main girder, each of the second nodes is located inside the curve of the continuous steel girder.

Further, using the temporary support to temporarily lock the continuous steel truss girder includes: after the rotation of the continuous steel truss girder is completed, adjusting the horizontal position and the vertical position of the continuous steel truss girder; The body pier and the pier top of the temporary pier are provided with temporary supports; the height of all the temporary supports is raised until the weight of the continuous steel truss girder is borne by the temporary supports.

Further, the installation of the permanent support under the continuous steel truss includes: installing a translation track and translating the permanent support to a preset position of the permanent support in the construction plan, and the translation slideway is located in the continuous Both sides of the main girders of the steel truss; lower the height of all the temporary supports until the continuous steel girders are dropped onto the permanent supports; remove all the temporary supports.

Further, the temporary support is a flask.

The beneficial effects of the present invention are:

The invention solves the problems of large stress on the local members of the steel truss girder and difficult design of the node structure by dispersing and reducing the concentrated stress of the steel truss girder by arranging temporary supports, foot supports and reinforcing transverse braces on the top of the pier. The steel truss girder provides a favorable guarantee to realize the rotation of the pier top.

Other features and advantages of the present invention will be set forth in the description which follows, and, in part, will be apparent from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description, claims, and drawings.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the schematic flow chart of the continuous steel truss girder pier top rotation method described in the embodiment of the present invention;

2 is a schematic elevational view of the swivel section at the top of the continuous steel truss girder pier described in the embodiment of the present invention;

FIG. 3 is a schematic diagram of the suspension state constraint system described in the embodiment of the present invention;

FIG. 4 is a schematic diagram of the swivel state constraint system described in the embodiment of the present invention.

FIG. 5 is a schematic diagram of a temporary locking state constraint system described in an embodiment of the present invention.

FIG. 6 is a schematic diagram of the bridge state constraint system described in the embodiment of the present invention

Markings in the figure: 1. Swivel pier; 2. Temporary pier; 3. Main truss; 4. Second reinforcing cross brace; 51. First reinforcing cross bracing; 52. Third reinforcing cross bracing; 6. Corbel cross bracing 7. Temporary support; 8. Ball hinge; 9. Support foot; 10. Permanent support.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

The swivel method construction refers to a construction method in which the bridge structure is fabricated (pouring or splicing) at a non-design axis position and then placed in place by swivel. The rotation method is divided into vertical rotation method, horizontal rotation method, and vertical rotation and horizontal rotation combined method. The vertical rotation method is mostly used in arch bridges, and the horizontal rotation method is mainly used in cable-stayed bridges, T-frame bridges and prestressed concrete continuous girder bridges.

In the swivel bridge, the pier bottom swivel construction method is mostly used. The pier and beam before the swivel closure are temporarily consolidated, and the swivel system is arranged on the ground, which is convenient for construction. However, when the pier is high, the pier volume is large, or the groundwater level of the foundation is shallow, the use of pier bottom swivel will lead to The weight of the swivel body is greatly increased, the volume of the turntable and the upper and lower spherical hinges 8 also increases accordingly, and the size of the foundation and the number of protection works also increase significantly, which usually leads to a corresponding increase in the span of the main span.

Steel truss girders have high relative stiffness and light weight, and are the preferred beam type for large-span swivel bridges. At present, the simply supported steel truss girder pier top rotation in the project mostly adopts the method without counterweight, that is, one permanent bridge pier is used as the fixed rotation axis, and the slideway beam is pre-installed between the other permanent bridge pier and the temporary support piers on both sides of the railway. In this way, the non-rotating shaft end of the steel truss girder is slowly pressed onto the corresponding permanent pier to complete the rotation; this scheme requires temporary support piers on both sides of the railway, and a long slipper between the permanent pier and the temporary pier 2. Road beams have disadvantages such as large amount of temporary structural engineering and high safety risks in construction across existing railways. Continuous steel truss girder construction using pier top rotation method needs to solve technical problems such as large force on local members and complex system transformation, which is rarely used in practical engineering.

Example:

This embodiment provides a method for rotating a continuous steel truss girder pier top to overcome the above problems of the construction method.

Referring to FIG. 1-FIG. 6, it is shown that the method includes step S100, step S200, step S300, step S400 and step S500. It should be noted that, in the upper part of Fig. 1-Fig. 6, the continuous steel truss girder is the inner side of the curve of the curved girder.

S100. Suspend and assemble the continuous steel truss girder at the top of the swivel pier 1 to the maximum cantilever state.

S200, rotating the continuous steel truss girder to a preset position of the bridge.

It should be noted that, the preset position of the bridge mentioned in this step refers to the position where the bridge needs to be built to connect the road during construction. Before the rotation, the steel truss beam is not on the road route, and it has an included angle with the road route.

S300, using temporary support 7 to temporarily lock the continuous steel truss beam;

S400, install the mid-span closure section and the side-span rear section of the continuous steel truss girder;

S500, install the permanent support 10 under the continuous steel truss beam.

In this method, the continuous steel truss girder can be rotated on the top of the pier through the four states of cantilevering, rotating, locking and finally forming a bridge on the top of the swivel pier, or the pier top of the permanent bridge pier. It can improve the current situation that the continuous steel truss girder is rarely constructed by the pier top swivel method.

Meanwhile, for the present application, the temporary support 7 is preferably a flask, which can be suggested to be adjusted in height for ease of use.

In order to further realize the purpose of cantilevering the steel truss beam to the maximum cantilever state, in this embodiment, step S100 further includes step S110 , step S120 , step S130 , step S140 and step S150 .

S110 , acquiring the construction plan and the position information of the swivel pier 1 .

S120, extracting the position information of all the reinforcing transverse braces of the continuous steel truss girder before the rotation in the construction plan.

S130. According to the position information of the swivel pier 1 and the position information before the swivel of all the reinforced transverse braces, two temporary piers 2 are set beside the swivel pier 1, and each temporary pier 2 is located at a reinforced transverse brace in front of the swivel. Below , two temporary piers 2 are located on both sides of the swivel pier 1, respectively.

It should be noted that the reinforcing transverse bracing mentioned in this step is the transverse bracing of the bridge. In this method, in order to realize the rotation at the top of the pier, the construction time of the bridge is improved by simplifying the number of temporary structures, that is, the The support for the bridge is added near the swivel pier 1 to reduce the structural strength requirements for the bridge located at the swivel pier 1.

S140. According to the position information of the swivel pier 1 and the pre-swivel position information of all the reinforcing transverse braces, at least one temporary support 7 is respectively set on the pier top of the swivel pier 1 and the pier top of the temporary pier 2, and each temporary support 7 are located below the main truss 3 of the continuous steel truss girder.

S150, in the case of the cooperation of the crane, hang and assemble the continuous steel truss girder under the support of the temporary support 7 until the continuous steel truss girder reaches the maximum cantilever state.

In this step, by adding a temporary pier 2 near the swivel pier 1, the bridge is further supported by setting a temporary support 7 on the pier tops of the swivel pier 1 and the temporary pier 2. The concentrated force of the truss beam enhances the structural strength of the steel truss beam, so that it can complete the assembly of the steel truss beam with the cooperation of the crane.

Further, in order to disperse the concentrated force of the steel truss girder, in this embodiment, S140 also includes steps S141 and S142.

For ease of understanding, referring to FIG. 3 , in this embodiment, the continuous steel truss girder includes a first reinforcing cross brace 51 , a second reinforcing cross brace 4 and a third reinforcing cross brace 52 , and the third reinforcing cross brace 52 is located in the first reinforcing cross brace 52 . Between the reinforcing cross brace 51 and the third reinforcing cross brace 52, the third reinforcing cross brace is located above the swivel pier 1, and the first reinforcing cross brace 51 and the second reinforcing cross brace 4 are respectively located above the two temporary piers 2; At least one temporary support 7 is respectively arranged on the pier top of the body pier 1 and the pier top of the temporary pier 2.

S141. Extend the corbel cross brace 6 formed by one end of the first reinforcing cross brace 51 and the third reinforcing cross brace 52 protruding from the outer side of the main truss 3 of the continuous steel truss girder, and the corbel cross brace 6 of the first reinforcing cross brace 51 and The corbel beams 6 of the third reinforcing beams 52 are all located on the same side of the main girder 3 of the continuous steel girder.

It should be noted that, the “extending the corbel cross brace 6 formed by one end of the first reinforcing cross brace 51 and the third reinforcing cross brace 52 protruding from the outside of the main girder 3 of the steel truss girder” mentioned in this step is related to Those skilled in the art preferably prefer that the length of the first reinforcing cross brace 51 and the third reinforcing cross brace 52 is greater than the width of the bridge when the first reinforcing cross brace 51 and the third reinforcing cross brace 52 are constructed. That is, the first reinforcing cross brace 51 and the third reinforcing cross brace 52 are preferably integrally formed, which is beneficial to the problem of maintaining the overall structure.

S142, setting temporary supports 7 under the two corbel cross braces 6 and the three first nodes respectively, and the first nodes are respectively located at the first reinforcing cross brace 51, the second reinforcing cross brace 4 and the third reinforcing cross brace 52 and the main cross brace 52. At the connection point of the girder 3, all the first nodes are located on the side of the main girder 3 away from the corbel 6.

In this embodiment, the temporary support 7 is set in the area where the step S142 is located, and the weight of the continuous steel truss girder is first divided into six temporary supports 7 by applying dislocation support on the side of the corbel 6, and the continuous distribution is carried out. The weight of the steel truss girders also supports the dislocation in a way that assists each other in resisting unbalanced bending moments.

In order to further realize the purpose of turning the continuous steel truss girder, in this embodiment, step S200 further includes step S210, step S220 and step S230

S210, install swivel equipment and support feet 9 on the swivel pier 1 and the two temporary piers 2, the swivel equipment includes a spherical hinge 8, the spherical hinge 8 is arranged on the swivel pier 1, and there are at least three support feet 9, The supporting feet 9 are respectively arranged on the swivel pier 1 and the two temporary piers 2 .

It should be noted that, in this step, the swivel device may further include slide rails, and slide rails are arranged on the swivel pier 1 and the temporary pier 2 to assist the rotation of the continuous steel truss girder. At the same time, it can be understood that in this embodiment, the spherical hinge 8 can be arranged on the swivel pier 1 before the continuous steel truss girder is assembled until the maximum cantilever state, so as to achieve the purpose of facilitating the installation of the spherical hinge 8 in turn.

S220 , lowering the heights of all temporary supports 7 until the continuous steel truss girder is dropped onto the spherical hinge 8 .

In this embodiment, the spherical hinge 88 bears the vertical load of the steel truss girder through the temporary support 7 , and resists the unbalanced bending moment of the continuous steel truss girder through the spherical hinge 88 and the support feet 99 .

S230 , remove all temporary supports 7 .

In this step, under the structural self-weight of the continuous steel truss girder, the spherical hinge 8 alone bears the vertical load to complete the supporting effect of the continuous steel truss girder. The restraint system composed of 9 is used to resist the unbalanced bending moment and ensure that the beam body of the continuous steel truss beam is stable and does not overturn.

In order to further realize that the restraint system composed of the spherical hinge 8 and the support feet 9 can resist the unbalanced bending moment, the step S210 in this embodiment further includes the step S211 and the step S212.

S211 , if the continuous steel truss girder is a straight beam, the spherical hinge 8 is arranged at the center of the reinforcing transverse brace of the continuous steel truss girder.

S212, if the continuous steel truss girder is a curved girder, the spherical hinge 8 is arranged below the reinforcing transverse brace corresponding to the position of the center of gravity of the continuous steel truss girder.

In the present embodiment, by taking the structural characteristics of the continuous steel truss girder itself, the two types of the continuous steel truss girder are straight beams and curved beams, and different installation locations of the spherical hinges 8 are used to realize the supporting effect on the continuous steel truss girder.

In order to further realize that the restraint system composed of the ball hinge 8 and the support feet 9 can resist the unbalanced bending moment, in this embodiment, step S220 also includes preferably making the support feet 9 a circular arrangement with the ball hinge 8 as the center, so that The circular arrangement can effectively resist the influence of wind from different directions, and the circular arrangement can fit the rotation radian of the continuous steel truss girder. Zhongdu stably supports continuous steel truss beams. Specifically, step S220 includes step S221, step S222 and step S223.

S221 , extending the corbel cross brace 6 formed by one end of the first reinforcing cross brace 51 , the second reinforcing cross brace 4 and the third reinforcing cross brace 52 protruding from the outer side of the main girder 3 of the continuous steel truss girder.

It should be noted that in this step, the corbel cross brace 6 is the corbel cross brace 6 in S141, and the second reinforcing cross brace 4 is the same as the first reinforcing cross brace 51 and the third reinforcing cross brace 52, preferably Integrated molding, see S141 for details.

S222. If the continuous steel truss girder is a straight beam, then at the two second nodes, the corbel 6 of the first reinforcing cross brace 51 and the third reinforcing cross brace 52, the second reinforcing cross brace 4 and the main girder 3 A support foot 9 is set at the joint point, and the support foot 9 is arranged in a circle with the spherical hinge 8 as the center. Each first node is located on the side of the main girder 3 away from the corbel 6 .

It should be noted that the second nodes mentioned in this step are the same as two of the first nodes mentioned in step S142. This step is for the convenience of description, and it can be understood that it is an area.

S223. If the continuous steel truss girder is a curved beam, the corbel cross brace 6 is located inside the curve of the continuous steel truss girder, and at the two second nodes, the corbel cross brace 6 of the second reinforcing cross brace 4, the first reinforcing cross brace 6 A support foot 9 is arranged under the support 51, the second reinforcement transverse support 4 and the third reinforcement transverse support 52. The support foot 9 is arranged in a circle with the ball hinge 8 as the center, and the second node is located at the first reinforcement transverse support 51 and At the connection point between the third reinforcing transverse brace 52 and the main girder 3, each second node is located inside the curve of the continuous steel girder.

In order to further achieve the purpose of temporarily locking the continuous steel truss girder by using the temporary support 7, step S300 also includes steps S310, S320 and S330.

S310, after the rotation of the continuous steel truss girder is completed, adjust the lateral position and the vertical position of the continuous steel truss girder.

S320 , setting temporary supports 7 on the pier tops of the swivel pier 1 and the temporary pier 2 .

S330 , raising the heights of all temporary supports 7 until the weight of the continuous steel truss girder is borne by the temporary supports 7 .

In this step, the continuous steel girders are adjusted before locking to better match the process preset positions.

At the same time, it can be understood that this step S330 may also include a process of removing the swivel device.

Specifically, step S500 further includes step S510, step S520 and step S530.

S510, install the translation track and translate the permanent support 10 to the preset position of the permanent support 10 in the construction plan, and the translation slides are located on both sides of the main truss 3 of the continuous steel truss girder.

S520 , lowering the heights of all temporary supports 7 until the continuous steel girders are dropped onto the permanent supports 10 .

S530 , remove all temporary supports 7 .

In the present embodiment, the process steps of falling beams are reduced by the temporary support 7 which is easy to adjust.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or replacements, which should cover within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A method for rotating a continuous steel truss girder pier top, comprising:

The continuous steel truss girder is assembled and cantilevered at the top of the swivel pier (1) until the maximum cantilever state;

rotating the continuous steel truss girder to the preset position of the bridge;

temporarily locking the continuous steel girders using temporary supports (7);

Install the mid-span closing section and the side-span rear section of the continuous steel truss girder;

Install permanent supports (10) under the continuous steel girders.
The continuous steel truss girder pier top swivel method according to claim 1, characterized in that, the continuous steel truss girder cantilevered and assembled on the pier top of the swivel pier (1) until the maximum cantilever state comprises:

Obtain the construction plan and the position information of the swivel pier (1);

Extracting the position information of all the reinforcing transverse braces of the continuous steel truss girder before the rotation in the construction plan;

According to the position information of the swivel pier (1) and the pre-swivel position information of all the reinforcing cross braces, two temporary piers (2) are arranged beside the swivel pier (1). The piers (2) are all located below one of the reinforcing transverse braces in front of the swivel body, and the two temporary piers (2) are respectively located on both sides of the swivel body pier (1);

According to the position information of the swivel pier (1) and the pre-swivel position information of all the reinforcing cross braces, on the pier top of the swivel pier (1) and the pier top of the temporary pier (2) at least one temporary support (7) is respectively provided, each of the temporary supports (7) is located below the main girders (3) of the continuous steel truss;

In the case of the cooperation of the crane, the continuous steel truss girder is assembled under the support of the temporary support (7) until the continuous steel truss girder reaches the maximum cantilever state.
The method for rotating a continuous steel truss girder pier top according to claim 2, wherein the continuous steel truss girder comprises a first reinforcing cross brace (51), a second reinforcing cross brace (4) and a third reinforcing cross brace A brace (52), the third reinforcing cross brace (52) is located between the first reinforcing cross brace (51) and the third reinforcing cross brace (52), and the third reinforcing cross brace (52) is located in the pivot Above the body pier (1), the first reinforcing transverse brace (51) and the second reinforcing transverse brace (4) are respectively located above the two temporary piers (2); At least one temporary support (7) is respectively provided on the pier top of (1) and the pier top of the temporary pier (2), including:

Extend the corbel cross braces (6) formed by one end of the first reinforcing cross brace (51) and the third reinforcing cross brace (52) protruding from the outer side of the main girder (3) of the continuous steel truss girder, so The corbel cross brace (6) of the first reinforcing cross brace (51) and the corbel cross brace (6) of the third reinforcing cross brace (52) are both located on the main truss (3) of the continuous steel truss girder on the same side;

Temporary supports (7) are respectively provided under the two corbel cross braces (6) and the three first nodes, and the first nodes are respectively located at the first reinforcing cross braces (51) and the second reinforcing cross braces (4). ) and the third reinforcing cross brace (52) and the main girder (3), all the first nodes are located on the side of the main girder (3) away from the corbel cross brace (6) .
The method for rotating a continuous steel truss girder pier top according to claim 2, wherein the rotating the continuous steel truss girder to a preset position of the bridge comprises:

A swivel device and support feet (9) are installed on the swivel pier (1) and the two temporary piers (2), the swivel device including a spherical hinge (8), the spherical hinge (8) ) is arranged on the swivel pier (1), the support feet (9) are at least three, and the support feet (9) are respectively arranged on the swivel pier (1) and the two temporary piers (2) on;

Lowering the height of all said temporary supports (7) until said continuous steel girders are dropped onto said spherical hinges (8);

Remove all said temporary supports (7).
The continuous steel truss girder pier top swivel method according to claim 4, wherein the spherical hinge (8) is arranged on the swivel pier (1), comprising:

If the continuous steel truss girder is a straight beam, the spherical hinge (8) is arranged at the center of the reinforcing transverse brace of the continuous steel truss girder;

If the continuous steel truss girder is a curved girder, the spherical hinge (8) is arranged below the reinforcing cross brace corresponding to the position of the center of gravity of the continuous steel truss girder.
The method for swivel top of a continuous steel truss girder pier according to claim 4, wherein the bracing feet (9) are respectively arranged on the swivel pier (1) and the two temporary piers (2) The upper part includes: the support feet (9) are arranged in a circle with the spherical hinge (8) as the center.
The method for rotating a continuous steel truss girder pier top according to claim 4, wherein the continuous steel truss girder comprises a first reinforcing cross brace (51), a second reinforcing cross brace (4) and a third reinforcing cross brace A brace (52), the third reinforcing cross brace (52) is located between the first reinforcing cross brace (51) and the third reinforcing cross brace (52), and the third reinforcing cross brace (52) is located in the pivot Above the body pier (1), the first reinforcing transverse brace (51) and the second reinforcing transverse brace (4) are respectively located above the two temporary piers (2), wherein the support feet (9) ) are respectively arranged on the swivel pier (1) and the two temporary piers (2), including:

Extending one end of the first reinforcing cross brace (51), the second reinforcing cross brace (4) and the third reinforcing cross brace (52) protrudes from the outside of the main girders (3) of the continuous steel truss girder The formed corbel brace (6);

If the continuous steel truss girder is a straight beam, at the two second nodes, the corbel beams (6) of the first reinforcing cross brace (51) and the third reinforcing cross brace (52) and all the A support foot (9) is provided at the junction point between the second reinforcing transverse brace (4) and the main girder (3), and the support foot (9) is presented with the spherical hinge (8) as the center Circular arrangement, the first nodes are respectively located at the junction points of the first reinforcing cross brace (51) and the third reinforcing cross brace (52) with the main girder (3), and each of the first nodes is located at the main girders (3). The side of the girder (3) away from the corbel (6);

If the continuous steel truss girder is a curved beam, the corbel (6) is located on the inner side of the curve of the continuous steel truss girder. A support foot (9) is provided under the corbel cross brace (6), the first reinforcing cross brace (51), the second reinforcing cross brace (4) and the third reinforcing cross brace (52). , the support feet (9) are arranged in a circle with the ball hinge (8) as the center, and the second nodes are located respectively between the first reinforcing cross brace (51) and the third reinforcing cross brace (52) and the At the point where the main girders (3) meet, each of the second nodes is located inside the curve of the continuous steel truss girder.
The method for pier top rotation of continuous steel truss girder according to claim 1, characterized in that, the use of temporary support (7) to temporarily lock the continuous steel truss girder comprises:

After the rotation of the continuous steel truss girder is completed, the horizontal and vertical positions of the continuous steel truss girder are adjusted;

A temporary support (7) is arranged on the pier top of the swivel pier (1);

Raise the height of all the temporary supports (7) until the weight of the continuous steel girders is carried by the temporary supports (7).
The method for rotating a continuous steel truss girder pier top according to claim 1, wherein the installing a permanent support (10) under the continuous steel truss girder comprises:

Install the translation track and translate the permanent support (10) to the preset position of the permanent support (10) in the construction plan, and the translation slideway is located on both sides of the main girders (3) of the continuous steel truss;

lowering the height of all said temporary supports (7) until said continuous steel girders are dropped onto said permanent supports (10);

Remove all said temporary supports (7).
The method for rotating a continuous steel truss girder pier top according to claim 9, wherein the temporary support (7) is a sand box.