Steel truss girder incremental launching construction method and device

Abstract

The invention relates to a steel truss girder incremental launching construction method and device, and the method comprises the following steps: driving an N node of a steel truss girder to move on an incremental launching support system along with a first cross beam by utilizing an incremental launching sliding system, and enabling the steel truss girder to move by an inter-node length in the length direction of a bridge; the pushing jacking system is used for jacking the first cross beam, the sliding end of the pushing sliding system is switched to the position below the N + 1 node from the position below the N node of the steel truss girder, the pushing jacking system is used for moving the second cross beam on the outer side of the N + 1 node of the steel truss girder to the sliding end of the pushing sliding system, and the pushing jacking system is used for unloading and pulling out the first cross beam; moving the first cross beam to the outer side of the N + 1 node of the steel truss girder; and the N + 1 nodes of the steel truss girder are driven by the pushing sliding system to continuously move by an inter-node length along with the second cross beam. The steel truss girder is prevented from being directly jacked by the jacking system, the steel truss girder is prevented from being damaged or destroyed, the construction period is shortened through switching of the first cross beam and the second cross beam, and the working intensity is reduced.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and particularly to a method and device for launching a steel truss girder Background Art

[0002] Since steel has many advantages such as high strength, uniform material, good plasticity and toughness, and good weldability, steel bridges have the following characteristics: large spanning capacity. Due to the high strength of steel, under the condition of the same bearing capacity, compared with reinforced concrete bridges, the cross-section of steel bridge components is smaller, so the self-weight of steel bridges is lighter, and it is most suitable for building long-span bridges. Most suitable for industrial manufacturing. Steel bridge components are generally processed and manufactured by special equipment in specialized factories, which are not restricted by seasons, with fast processing and manufacturing speed, high precision, and easy quality control, so the degree of industrial manufacturing is high. Convenient for transportation. Since the self-weight of steel bridge components is lighter, especially in mountainous areas with inconvenient transportation, it is convenient for truck transportation. Fast installation speed. Steel bridge components are convenient to be assembled by the cantilever construction method, and there are complete sets of equipment available, and the assembly process is mature. Steel bridge components are easy to repair and replace. Steel is easy to rust, so the maintenance cost of steel bridges is high. In addition, steel bridges must be fireproof and have a large noise when trains pass by, so it is not suitable to build railway steel bridges in downtown areas.

[0003] In the related art, the construction of traditional steel truss girders is the bracket method, which is a method of erecting a floor bracket at the bridge site and assembling the steel truss girder on it. Its construction period is slow, the working intensity of workers is high, and it needs to cooperate with crane hoisting construction, making the construction very difficult and extremely inconvenient. Summary of the Invention

[0004] This application provides a method and device for launching a steel truss girder. By means of the first cross beam and the second cross beam, it is possible to avoid the direct jacking of the steel truss girder by the jacking and launching system, which may cause damage or destruction to the steel truss girder structure. And through the switching of the first cross beam and the second cross beam, the construction period is greatly shortened and the working intensity is reduced.

[0005] In a first aspect, an embodiment of this application provides a method for launching a steel truss girder, which includes the following steps:

[0006] Drive the N node of the steel truss girder to move along the first cross beam on the jacking and launching support system by using the jacking and sliding system, so that the steel truss girder moves a bay length along the bridge length direction;

[0007] Use the jacking and launching system to jack up the first cross beam, and switch the sliding end of the jacking and sliding system from below the N node of the steel truss girder to below the N+1 node. Use the jacking and launching system to move the second cross beam at the outside of the N+1 node of the steel truss girder to the sliding end of the jacking and sliding system, and use the jacking and launching system to lower and extract the first cross beam, so that the first cross beam moves to the outside of the N+1 node of the steel truss girder;

[0008] Use the pushing and sliding system to drive the N+1 node of the steel truss girder to continue moving a bay length along with the second cross beam;

[0009] Use the pushing and jacking system to complete the replacement of the second cross beam and the first cross beam, and switch the sliding end of the pushing and sliding system from under the N+1 node of the steel truss girder to under the N+2 node, preparing for the next cycle of pushing and sliding working conditions.

[0010] Combined with the first aspect, in an embodiment, the step of using the pushing and jacking system to jack up the first cross beam and switch the sliding end of the pushing and sliding system from under the N node of the steel truss girder to under the N+1 node includes:

[0011] Set a rigid cushion block at the jacking end of the pushing and jacking system to make the jacking end of the pushing and jacking system tightly attached to the first cross beam, and use the pushing and jacking system to jack up the first cross beam;

[0012] Drive the moving end of the pushing and sliding system to switch from under the N node of the steel truss girder to under the N+1 node.

[0013] Combined with the first aspect, in an embodiment, the step of using the pushing and jacking system to move the second cross beam at the outside of the N+1 node of the steel truss girder to the sliding end of the pushing and sliding system, and using the pushing and jacking system to lower and extract the first cross beam, so that the first cross beam moves to the outside of the N+1 node of the steel truss girder includes:

[0014] Use the pushing and jacking system to move the second cross beam at the outside of the N+1 node of the steel truss girder to the sliding end of the pushing and sliding system;

[0015] Slide the cross beam cushion block of the pushing and jacking system to the bottom of the first cross beam. At this time, the top elevation of the cross beam cushion block is the same as the bottom elevation of the first cross beam;

[0016] Use the first transverse traction device of the pushing and jacking system to move the first cross beam out of the area under the N node of the steel truss girder along the transverse bridge direction and place it on the first transverse platform of the pushing and jacking system;

[0017] Move the first cross beam to the outside of the N+1 node of the steel truss girder.

[0018] Combined with the first aspect, in an embodiment, before using the pushing and sliding system to drive the N node of the steel truss girder to move along with the first cross beam on the pushing support system, so that the steel truss girder moves a bay length along the bridge length direction, it includes:

[0019] Perform a limiting treatment on the contact surfaces between the moving end of the pushing and sliding system, the first cross beam and the N node of the steel truss girder to keep the three relatively stationary.

[0020] In combination with the first aspect, in one embodiment, before using the pushing and sliding system to drive the first cross beam to move on the pushing support system, so that the steel truss girder moves a bay length, and using the pushing and jacking system to jack up the first cross beam and reset the mobile end of the pushing and sliding system, it includes:

[0021] In each pier, along the transverse bridge direction, two pushing support systems are installed at intervals on the top of the pier, and the pushing and sliding system and the pushing and jacking system are installed on the pushing support system.

[0022] In the second aspect, an embodiment of the present application provides a steel truss girder pushing construction device, which includes:

[0023] A pushing support system, the pushing support system has a slideway, the slideway extends along the longitudinal bridge direction, and the slideway is used to be installed on the pier;

[0024] A pushing and sliding system, the pushing and sliding system is arranged on the slideway, the mobile end of the pushing and sliding system can move linearly along the length direction of the slideway, and the mobile end of the pushing and sliding system is used to support the first cross beam or the second cross beam;

[0025] A pushing and jacking system, the pushing and jacking system is arranged on the slideway, and the pushing and jacking system is used to jack up the first cross beam or the second cross beam below the steel truss girder node, and is also used to extract the first cross beam or the second cross beam below the steel truss girder node.

[0026] In combination with the second aspect, in one embodiment, the pushing support system includes:

[0027] Two steel pipe supports, the two steel pipe supports are distributed on the opposite sides of the pier along the longitudinal bridge direction, and slideway distribution beams are fixed at the tops of the two steel pipe supports;

[0028] A slideway beam, the length direction of the slideway beam extends along the longitudinal bridge direction and is fixed to the two slideway distribution beams, and the slideway beam forms the slideway.

[0029] In combination with the second aspect, in one embodiment, the pushing and sliding system includes:

[0030] A horizontal continuous jack, the horizontal continuous jack is installed on the slideway through a traction reaction seat;

[0031] A sliding shoe, the sliding shoe is slidably connected to the slideway, and the sliding shoe is connected to the horizontal continuous jack through a traction steel strand, and the sliding shoe forms the mobile end of the pushing and sliding system.

[0032] In combination with the second aspect, in one embodiment, the pushing and jacking system includes:

[0033] Vertical jacks, which are installed on opposite sides at one end of the slideway.

[0034] In combination with the second aspect, in an embodiment, the pushing and jacking system further includes:

[0035] A first transverse moving platform and a first transverse moving tractor installed on the first transverse moving platform. The first transverse moving platform is fixed at one end of the slideway, and the first transverse moving tractor can extract the first cross beam or the second cross beam under the N-1 node of the top steel truss beam and move it to the first transverse moving platform;

[0036] A second transverse moving platform and a second transverse moving tractor installed on the second transverse moving platform. The second transverse moving platform is fixed at the other end of the slideway, and the second transverse moving tractor can extract the first cross beam or the second cross beam under the N node of the top steel truss beam and move it to the second transverse moving platform.

[0037] The beneficial effects brought by the technical solution provided by the embodiment of the present application include:

[0038] A first cross beam is provided at the mobile end of the pushing and sliding system. The steel truss beam slides integrally with the first cross beam to achieve a movement of one joint length of the steel truss beam. After the pushing and jacking system jacks up the first cross beam as a whole, the mobile end of the pushing and sliding system resets to prepare for the pushing and sliding of the second cross beam. After the pushing and sliding condition of the second cross beam is carried out, the pushing and jacking system jacks up the second cross beam and the steel truss beam as a whole, and the mobile end of the pushing and sliding system resets to prepare for the second pushing and sliding condition of the first cross beam, realizing the switching work between the first cross beam and the second cross beam. Subsequently, by repeating the pushing and sliding conditions of the first cross beam and the second cross beam in a cycle, the construction of the steel truss beam can be completed; through the first cross beam and the second cross beam, it is possible to avoid the pushing and jacking system directly jacking up the steel truss beam, causing damage or destruction to the steel truss beam structure, and through the switching between the first cross beam and the second cross beam, the construction difficulty is low, the construction period is greatly shortened, the work intensity is reduced, and the problem that in the related technology, a crane is required to cooperate in the assembly construction, which is extremely difficult and inconvenient to construct, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a schematic flow chart of the steel truss beam pushing construction method in the embodiment of the present application;

[0041] Figure 2Schematic diagram of the structure at the N node position of the first crossbeam supporting the steel truss beam in the embodiment of the present application;

[0042] Figure 3 is Figure 2 schematic diagram of the A-A section in;

[0043] Figure 4 is Figure 2 schematic diagram of the B-B section in;

[0044] Figure 5 Schematic diagram of the structure where the first crossbeam drives the steel truss beam to move a panel length in the embodiment of the present application;

[0045] Figure 6 is Figure 5 schematic diagram of the A-A section in;

[0046] Figure 7 is Figure 5 schematic diagram of the B-B section in;

[0047] Figure 8 Schematic diagram of the structure where the sliding shoe is reset for the first time in the embodiment of the present application;

[0048] Figure 9 is Figure 8 schematic diagram of the A-A section in;

[0049] Figure 10 is Figure 8 schematic diagram of the B-B section in;

[0050] Figure 11 Schematic diagram of the structure at the N+1 node position of the second crossbeam supporting the steel truss beam in the embodiment of the present application;

[0051] Figure 12 is Figure 11 schematic diagram of the A-A section in;

[0052] Figure 13 is Figure 11 schematic diagram of the B-B section in;

[0053] Figure 14 Schematic diagram of the structure where the first crossbeam is switched to the N+2 node position of the supporting steel truss beam in the embodiment of the present application;

[0054] Figure 15 is Figure 14 schematic diagram of the A-A section in;

[0055] Figure 16 is Figure 14 schematic diagram of the B-B section in.

[0056] In the figure:

[0057] 10. Jacking support system; 11. Steel pipe support; 12. Slideway distribution beam; 13. Slideway beam;

[0058] 20. Jacking and sliding system; 21. Slide shoe; 22. Horizontal continuous jack; 23. Traction steel strand; 24. Traction reaction seat;

[0059] 30. Jacking and lifting system; 31. Vertical jack; 32. First transverse movement platform; 33. First transverse movement tractor; 34. Second transverse movement platform; 35. Second transverse movement tractor; 36. Rigid cushion block; 37. Cross beam cushion seat;

[0060] 4. First cross beam; 5. Second cross beam; 6. Steel truss beam. Detailed implementation manners

[0061] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0062] This application provides a construction method and device for jacking a steel truss beam. By using the first cross beam and the second cross beam, it is possible to avoid directly jacking the steel truss beam by the jacking and lifting system, which may cause damage or destruction to the structure of the steel truss beam. Through the switching between the first cross beam and the second cross beam, the construction period is greatly shortened and the working intensity is reduced.

[0063] It should be noted that for the convenience of understanding, hereinafter, N is a positive integer, and the distance between the Nth node and the (N + 1)th node of the steel truss beam 6 is the panel length of the steel truss beam 6.

[0064] As Figure 1 shown, the embodiment of this application provides a construction method for jacking a steel truss beam, which may include the following steps:

[0065] S1: Use the jacking and sliding system 20 to drive the Nth node of the steel truss beam 6 to move along the first cross beam 4 on the jacking support system 10, so that the steel truss beam 6 moves a panel length along the bridge length direction;

[0066] Among them, as Figure 2 shown, in the initial state, the mobile end of the jacking and sliding system 20 is at the starting point, as Figure 3As shown, the first crossbeam 4 is placed on the top of the mobile end of the jacking and sliding system 20, supporting the N node of the steel truss girder 6. The second crossbeam 5 is located outside the first crossbeam 4 and is in a standby state; as Figure 5 shown, the mobile end of the jacking and sliding system 20 drives the first crossbeam 4 to move on the jacking support system 10, so that the N node of the steel truss girder 6 moves leftward by one panel length along with the first crossbeam 4, that is, the N node of the steel truss girder 6 moves to the position where the original N-1 node of the steel truss girder 6 was located.

[0067] S2: As Figure 8 and Figure 10 shown, use the jacking system 30 to jack up the first crossbeam 4. As Figure 8 shown, switch the sliding end of the jacking and sliding system 20 from below the N node of the steel truss girder 6 to below the N+1 node, that is, move the sliding end of the jacking and sliding system 20 rightward by one panel length for resetting. As Figure 9 and Figure 12 shown, use the jacking system 30 to move the second crossbeam 5 outside the N+1 node of the steel truss girder 6 onto the sliding end of the jacking and sliding system 20. As Figure 11 and Figure 13 shown, and use the jacking system 30 to lower and extract the first crossbeam 4, so that the first crossbeam 4 moves to the outside of the N+1 node of the steel truss girder 6;

[0068] S3: Use the jacking and sliding system 20 to drive the N+1 node of the steel truss girder 6 to continue moving by one panel length along with the second crossbeam 5;

[0069] S4: As Figure 14 shown, use the jacking system 30 to complete the switching of the second crossbeam 5 and the first crossbeam 4 and switch the sliding end of the jacking and sliding system 20 from below the N+1 node of the steel truss girder 6 to below the N+2 node, preparing for the next cycle of jacking and sliding operation.

[0070] Specifically, use the jacking system 30 to jack up the second crossbeam 5, switch the sliding end of the jacking and sliding system 20 from below the N+1 node of the steel truss girder 6 to below the N+2 node, that is, move the sliding end of the jacking and sliding system 20 rightward by one panel length for resetting, and use the jacking system 30 to move the first crossbeam 4 outside the N+2 node of the steel truss girder 6 onto the sliding end of the jacking and sliding system 20, so as to complete the switching of the second crossbeam 5 and the first crossbeam 4 and switch the sliding end of the jacking and sliding system 20 from below the N+1 node of the steel truss girder 6 to below the N+2 node, preparing for the next cycle of jacking and sliding operation.

[0071] In summary, the mobile end of the pushing and sliding system 20 is provided with the first cross beam 4, and the steel truss beam 6 slides integrally with the first cross beam 4 to move the steel truss beam 6 by the length of one joint. After the pushing and jacking system 30 jacks up the first cross beam 4 integrally, the mobile end of the pushing and sliding system 20 resets to prepare for the pushing and sliding of the second cross beam 5. After the pushing and sliding operation of the second cross beam 5, the pushing and jacking system 30 jacks up the second cross beam 5 and the steel truss beam 6 integrally, and the mobile end of the pushing and sliding system 20 resets to prepare for the second pushing and sliding operation of the first cross beam 4, realizing the switching work between the first cross beam 4 and the second cross beam 5. Subsequently, the pushing and sliding operations of the first cross beam 4 and the second cross beam 5 are repeated in cycles to complete the construction of the steel truss beam 6. By means of the first cross beam 4 and the second cross beam 5, it is possible to prevent the pushing and jacking system 30 from directly jacking up the steel truss beam 6 and causing damage or destruction to the structure of the steel truss beam. Through the switching between the first cross beam 4 and the second cross beam 5, the construction difficulty is low, the construction period is greatly shortened, the working intensity is reduced, and the problem that in the related technology, a crane is required for assembly construction, which is extremely difficult and inconvenient to construct, is solved. Among them, through the protruding area of the steel truss beam 6 supported by the first cross beam 4, the protruding area of the steel truss beam 6 has good bending resistance and structural strength, preventing the problem of structural damage caused by the pushing and jacking system 30 jacking up the steel truss beam 6.

[0072] In some embodiments, in step S2, the following steps may be included:

[0073] S21: As Figure 10 shown, a rigid cushion block 36 is arranged at the jacking end of the pushing and jacking system 30 to make the jacking end of the pushing and jacking system 30 tightly fit with the first cross beam 4, and the first cross beam 4 is jacked up by using the pushing and jacking system 30;

[0074] S22: As Figure 8 shown, the mobile end of the pushing and sliding system 20 is driven to switch from below the N node of the steel truss beam 6 to below the N + 1 node.

[0075] In this embodiment, the rigid cushion block 36 can ensure the safety of the subsequent jacking work of the pushing and jacking system 30, reduce the construction risk, and also ensure the service life of the first cross beam 4.

[0076] In some embodiments, in step S2, the following steps may be included:

[0077] S21: As Figure 12 shown, the second cross beam 5 at the outside of the N + 1 node of the steel truss beam 6 is moved to the sliding end of the pushing and sliding system 20 by using the pushing and jacking system 30;

[0078] S22: As Figure 10As shown, slide the crossbeam pedestal 37 of the jacking system 30 to the bottom of the first crossbeam 4. At this time, the elevation of the top surface of the crossbeam pedestal 37 is the same as the elevation of the bottom surface of the first crossbeam 4.

[0079] S23: As Figure 13 shown, use the first transverse traction device 33 of the jacking system 30 to move the first crossbeam 4 out from under the N node of the steel truss girder 6 in the transverse direction of the bridge and place it on the first transverse platform 32 of the jacking system 30.

[0080] S24: Move the first crossbeam 4 to the outside of the N + 1 node of the steel truss girder 6.

[0081] In this embodiment, the smooth removal of the first crossbeam 4 can be achieved by using the crossbeam pedestal 37 of the jacking system 30, and the temporary transfer of the first crossbeam 4 can be achieved by using the first transverse traction device 33 and the first transverse platform 32 of the jacking system 30, making preparations in advance for the next movement of the second crossbeam 5.

[0082] In some embodiments, before step S1, the following steps may be included:

[0083] S0: Perform a limiting treatment on the contact surfaces between the mobile end of the jacking and sliding system 20, the first crossbeam 4, and the N node of the steel truss girder 6 to keep the three relatively stationary.

[0084] In this embodiment, by performing a limiting treatment on the contact surfaces between the mobile end of the jacking and sliding system 20, the first crossbeam 4, and the steel truss girder 6, the three are kept relatively stationary, ensuring that the mobile end of the jacking and sliding system 20 can stably drag the steel truss girder 6 to move and preventing the steel truss girder 6 from detaching from the top of the first crossbeam 4 and causing a safety accident.

[0085] In some embodiments, before step S1, the following steps may be included:

[0086] S0: In each pier, along the transverse direction of the bridge, install two jacking support systems 10 at intervals on the top of the pier and install the jacking and sliding system 20 and the jacking system 30 on the jacking support system 10.

[0087] In this example, before the jacking and sliding work of the steel truss girder 6, complete the installation work of the jacking support system 10, the jacking and sliding system 20, and the jacking system 30 on the pier.

[0088] In addition, as Figures 2 - 16As shown in the figure, an incremental launching construction device for a steel truss girder may also be provided in an embodiment of the present application, which includes: a jacking support system 10, the jacking support system 10 having a slideway, the slideway extending along the longitudinal bridge direction and being configured to be installed on the pier body; an incremental launching and sliding system 20, the incremental launching and sliding system 20 being disposed on the slideway, the moving end of the incremental launching and sliding system 20 being capable of linearly moving along the length direction of the slideway, and the moving end of the incremental launching and sliding system 20 being configured to support the first cross beam 4 or the second cross beam 5; a jacking and lifting system 30, the jacking and lifting system 30 being disposed on the slideway and being configured to lift the first cross beam 4 or the second cross beam 5 under the node of the steel truss girder 6 and also being configured to extract the first cross beam 4 or the second cross beam 5 under the node of the steel truss girder 6.

[0089] Further, the jacking support system 10 includes: two steel pipe supports 11, the two steel pipe supports 11 being distributed on opposite sides of the pier body along the longitudinal bridge direction, and slideway distribution beams 12 being fixed to the tops of the two steel pipe supports 11; a slideway beam 13, the length direction of the slideway beam 13 extending along the longitudinal bridge direction and being fixed to the two slideway distribution beams 12, the slideway beam 13 forming the slideway.

[0090] Further, the incremental launching and sliding system 20 includes: a horizontal continuous jack 22, the horizontal continuous jack 22 being installed on the slideway via a traction reaction seat 24; a sliding shoe 21, the sliding shoe 21 being slidably connected to the slideway, and the sliding shoe 21 being connected to the horizontal continuous jack 22 via a traction steel strand 23, the sliding shoe 21 forming the moving end of the incremental launching and sliding system 20.

[0091] Further, the jacking and lifting system 30 includes: a vertical jack 31, the vertical jack 31 being installed on opposite sides at one end of the slideway.

[0092] In this embodiment, the vertical jack 31 can be used to lift or lower the steel truss girder 6.

[0093] Further, the jacking and lifting system 30 further includes: a first transverse movement platform 32 and a first transverse movement tractor 33 installed on the first transverse movement platform 32, the first transverse movement platform 32 being fixed at one end of the slideway, and the first transverse movement tractor 33 being capable of extracting the first cross beam 4 or the second cross beam 5 under the N-1 node of the steel truss girder 6 and moving it to the first transverse movement platform 32; a second transverse movement platform 34 and a second transverse movement tractor 35 installed on the second transverse movement platform 34, the second transverse movement platform 34 being fixed at the other end of the slideway, and the second transverse movement tractor 35 being capable of extracting the first cross beam 4 or the second cross beam 5 under the N node of the steel truss girder 6 and moving it to the second transverse movement platform 34.

[0094] In this embodiment, the first transverse moving platform 32 and the first transverse traction device 33 installed on the first transverse moving platform 32 can move the first cross beam 4 or the second cross beam 5 out of the slideway, creating space for the next jacking work of the steel truss beam 6. The same applies to the second transverse moving platform 34 and the second transverse traction device 35 installed on the second transverse moving platform 34.

[0095] Furthermore, the jacking system 30 may further include: a rigid cushion block 36 and a cross beam seat 37. The rigid cushion block 36 is arranged at the top end of the jacking system 30 and is used to tightly hold the first cross beam 4 to ensure the smooth subsequent jacking work. The cross beam seat 37 is arranged at the bottom of the slideway and the first cross beam 4 to facilitate the subsequent removal of the first cross beam 4.

[0096] In this embodiment, the cross beam seat 37 can move the first cross beam 4 or the second cross beam 5 out of the slideway safely. The rigid cushion block 36 can perform the tightening work before the vertical jack 31 jacks, improving the safety of the vertical jack 31 during jacking.

[0097] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0098] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0099] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A construction method for jacking a steel truss girder, characterized in that It includes the following steps: Use the jacking and sliding system (20) to drive the N node of the steel truss girder (6) to move along with the first cross beam (4) on the jacking support system (10), so that the steel truss girder (6) moves a bay length along the bridge longitudinal direction; Use the jacking system (30) to jack up the first cross beam (4), and switch the sliding end of the jacking and sliding system (20) from below the N node of the steel truss girder (6) to below the N+1 node. Use the jacking system (30) to move the second cross beam (5) outside the N+1 node of the steel truss girder (6) onto the sliding end of the jacking and sliding system (20), and use the jacking system (30) to lower and extract the first cross beam (4), so that the first cross beam (4) moves to the outside of the N+1 node of the steel truss girder (6); Use the jacking and sliding system (20) to drive the N+1 node of the steel truss girder (6) to continue to move a bay length along with the second cross beam (5); Use the jacking system (30) to complete the switching of the second cross beam (5) and the first cross beam (4) and switch the sliding end of the jacking and sliding system (20) from below the N+1 node of the steel truss girder (6) to below the N+2 node, and prepare for the next cycle of jacking and sliding operation.

2. The construction method for jacking the steel truss girder according to claim 1, characterized in that The step of using the jacking system (30) to jack up the first cross beam (4) and switch the sliding end of the jacking and sliding system (20) from below the N node of the steel truss girder (6) to below the N+1 node includes: Set a rigid cushion block (36) at the jacking end of the jacking system (30) to make the jacking end of the jacking system (30) tightly fit with the first cross beam (4), and use the jacking system (30) to jack up the first cross beam (4); Drive the moving end of the jacking and sliding system (20) to switch from below the N node of the steel truss girder (6) to below the N+1 node.

3. The construction method for jacking the steel truss girder according to claim 1, characterized in that The step of using the jacking system (30) to move the second cross beam (5) outside the N+1 node of the steel truss girder (6) onto the sliding end of the jacking and sliding system (20), and using the jacking system (30) to lower and extract the first cross beam (4), so that the first cross beam (4) moves to the outside of the N+1 node of the steel truss girder (6) includes: Use the jacking system (30) to move the second cross beam (5) outside the N+1 node of the steel truss girder (6) onto the sliding end of the jacking and sliding system (20); Slide the cross beam cushion block (37) of the jacking system (30) to the bottom of the first cross beam (4), and at this time, the top elevation of the cross beam cushion block (37) is the same as the bottom elevation of the first cross beam (4); Use the first transverse traction device (33) of the jacking system (30) to move the first cross beam (4) out of the area below the N node of the steel truss girder (6) along the transverse direction of the bridge and place it on the first transverse platform (32) of the jacking system (30); Move the first cross beam (4) to the outside of the N+1 node of the steel truss girder (6).

4. The construction method for jacking the steel truss girder according to claim 1, characterized in that Before using the pushing and sliding system (20) to drive the N-node of the steel truss beam (6) to move along with the first cross beam (4) on the pushing support system (10) so that the steel truss beam (6) moves a bay length along the bridge length direction, it includes: Performing a limit treatment on the contact surfaces between the mobile end of the pushing and sliding system (20), the first cross beam (4) and the N-node of the steel truss beam (6) to keep them relatively stationary with respect to each other.

5. The construction method for pushing the steel truss beam according to claim 1, characterized in that Before using the pushing and sliding system (20) to drive the first cross beam (4) to move on the pushing support system (10) so that the steel truss beam (6) moves a bay length, and using the pushing and jacking system (30) to jack up the first cross beam (4) and reset the mobile end of the pushing and sliding system (20), it includes: In each pier, along the transverse direction of the bridge, installing two pushing support systems (10) at intervals on the top of the pier and installing the pushing and sliding system (20) and the pushing and jacking system (30) on the pushing support system (10).

6. A steel truss girder incremental launching construction device, characterized in that It includes: A pushing support system (10), the pushing support system (10) having a slideway, the slideway extending along the longitudinal direction of the bridge, and the slideway being used for installation on the pier; A pushing and sliding system (20), the pushing and sliding system (20) being arranged on the slideway, the mobile end of the pushing and sliding system (20) being capable of linearly moving along the length direction of the slideway, and the mobile end of the pushing and sliding system (20) being used for placing the first cross beam (4) or the second cross beam (5); A pushing and jacking system (30), the pushing and jacking system (30) being arranged on the slideway, and the pushing and jacking system (30) being used for jacking up the first cross beam (4) or the second cross beam (5) below the node of the steel truss beam (6), and also being used for extracting the first cross beam (4) or the second cross beam (5) below the node of the steel truss beam (6).

7. The construction device for pushing the steel truss beam according to claim 6, characterized in that The pushing support system (10) includes: Two steel pipe supports (11), the two steel pipe supports (11) being distributed on opposite sides of the pier along the longitudinal direction of the bridge, and slideway distribution beams (12) being fixed to the tops of the two steel pipe supports (11); A slideway beam (13), the length direction of the slideway beam (13) extending along the longitudinal direction of the bridge and being fixed to the two slideway distribution beams (12), the slideway beam (13) forming the slideway.

8. The construction device for pushing the steel truss beam according to claim 6, characterized in that The pushing and sliding system (20) includes: A horizontal continuous jack (22), the horizontal continuous jack (22) being installed on the slideway via a traction reaction seat (24); A sliding shoe (21), the sliding shoe (21) being slidably connected to the slideway, and the sliding shoe (21) being connected to the horizontal continuous jack (22) via a traction steel strand (23), the sliding shoe (21) forming the mobile end of the pushing and sliding system (20).

9. The construction device for pushing the steel truss beam according to claim 6, characterized in that The pushing and jacking system (30) includes: Vertical jack (31), and the vertical jack (31) is installed on opposite sides at one end of the slideway.

10. The steel truss girder pushing construction device according to claim 6, wherein the pushing and jacking system (30) further comprises: a first transverse movement platform (32) and a first transverse movement tractor (33) installed on the first transverse movement platform (32). The first transverse movement platform (32) is fixed at one end of the slideway, and the first transverse movement tractor (33) can extract the first cross beam (4) or the second cross beam (5) under the N-1 node of the top steel truss girder (6) and move it to the position of the first transverse movement platform (32); a second transverse movement platform (34) and a second transverse movement tractor (35) installed on the second transverse movement platform (34). The second transverse movement platform (34) is fixed at the other end of the slideway, and the second transverse movement tractor (35) can extract the first cross beam (4) or the second cross beam (5) under the N node of the top steel truss girder (6) and move it to the position of the second transverse movement platform (34).

Images