Pushing support based on existing bridge pier and construction method

Abstract

The invention relates to a pushing support based on an existing pier and a construction method, and relates to the technical field of bridge pushing operation support construction.The pushing support comprises a pier top support force transmission structure which is used for being arranged at the top of an existing pier column, and the two ends of the pier top support force transmission structure extend out of the vertical projection range of the existing pier column in the transverse bridge direction; the pier top support force transmission structure is located between an existing pier column and an original bridge steel plate beam. And the vertical force transmission structures are arranged at the two ends, extending out of the vertical projection range of the existing pier column in the transverse bridge direction, of the pier top support force transmission structures, located on the outer side of the original bridge steel plate beam in the transverse bridge direction and used for supporting the pushing platform. Due to the fact that the pier top support force transmission structure is located between the existing pier column and the original bridge steel plate beam, the two ends of the pier top support force transmission structure extend out of the vertical projection range of the existing pier column in the transverse bridge direction, the vertical force transmission structures are arranged at the two ends, extending out of the vertical projection range of the existing pier column in the transverse bridge direction, of the pier top support force transmission structure, the pier top support force transmission structure can be arranged in a small space, and the structure is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge jacking support construction, and in particular to a jacking support based on an existing bridge pier and a construction method. Background Art

[0002] With the rapid development of the bridge industry and the continuous improvement of construction technology, jacking construction has become a routine method in the construction and demolition of bridges, and the jacking platform is indispensable in the long-distance jacking process. Usually, during the setting of the jacking platform, there are problems such as the conflict between the existing structure and the jacking platform or the limited clearance height caused by the original structure, the difficulty of structural installation, the narrow piers and the inability to install the bracket system, the surrounding environment cannot support the use of large lifting equipment, and the pier top support structure cannot be directly lifted to the designated location for installation.

[0003] In the prior art, there is a space-constrained inclined vertical jacking pier support with patent number CN114808672A, which includes a pedestal, a pier body is arranged in the middle of the pedestal, and a vertical support structure is arranged around the outer ring of the pier body, wherein the vertical support structure gradually inclines outward from the pedestal toward the pier body, one end of the vertical support structure is fixed on the pedestal, and the other end of the vertical support structure is fixed on the pier body by a prestressed tension structure, and a buttress structure is also arranged between the vertical support structure and the pier body. The present invention uses its own pedestal as the foundation of the pier side support, and there is no need to re-drive piles and bored piles beside the pier, thereby reducing temporary structures and avoiding the problem of limited construction space; at the same time, its structural form is simple and reasonable, safe and reliable, and can meet the force requirements of steel beam jacking.

[0004] However, in the space-limited inclined jacking pier support, a vertical support structure needs to be installed on the pedestal, which requires a large vertical space. When the pier is too high, the height of the vertical support needs to be further increased, resulting in complex structure, troublesome installation, and waste of materials. Summary of the invention

[0005] The present application provides a jacking support and construction method based on existing bridge piers, which can solve the problem in the prior art that the space is limited and the inclined jacking pier side support needs to install a vertical support structure on the base, which has a large requirement for vertical space. When the pier column is too high, the height of the vertical support needs to be further increased, resulting in complex structure, troublesome installation, and waste of materials.

[0006] In a first aspect, an embodiment of the present application provides a jacking support based on an existing bridge pier, which includes:

[0007] The pier top support force transmission structure is used to be arranged on the top of the existing pier column, and both ends extend out of the vertical projection range of the existing pier column along the transverse direction of the bridge. The pier top support force transmission structure is located between the existing pier column and the original bridge steel plate beam;

[0008] A vertical force transmission structure is arranged at both ends of the vertical projection range of the existing pier column extending out of the pier top support force transmission structure along the transverse direction of the bridge, and is located on the outer side of the original bridge steel plate beam along the transverse direction of the bridge. The vertical force transmission structure is used to support the jacking platform.

[0009] In combination with the first aspect, in one embodiment, the pier top support force transmission structure includes two transverse distribution beams spaced apart along the longitudinal bridge direction, the two transverse distribution beams are used to be arranged at both ends of the existing support, the lower side of the transverse distribution beam is used to connect with the top of the existing pier, the two ends of the transverse distribution beam extend out of the vertical projection range of the existing pier along the transverse bridge direction, and both ends of the transverse distribution beam are provided with vertical force transmission structures.

[0010] In combination with the first aspect, in one embodiment, the pier top support force transmission structure further includes a connection system, and the connection system is arranged between the two transverse distribution beams and is respectively connected to the two transverse distribution beams.

[0011] In combination with the first aspect, in one embodiment, the connection system includes a plurality of first connection systems, the first connection systems are located between adjacent existing supports, and the first connection systems include:

[0012] Two first connecting rods are arranged at intervals along the transverse direction of the bridge, wherein the first connecting rods are arranged along the longitudinal direction of the bridge, and both ends of the first connecting rods are respectively connected to the two transverse distribution beams;

[0013] Two first cross rod units are arranged along the longitudinal bridge direction, and the first cross rod unit is X-shaped, and two sides are respectively connected to the two first connecting rods.

[0014] In combination with the first aspect, in one embodiment, the connection system further includes two second connection systems, which are respectively located at two ends of the transverse distribution beam and correspond to the positions of the vertical force transmission structure, and the second connection system includes:

[0015] Two second connecting rods are arranged at intervals along the transverse direction of the bridge, the second connecting rods are arranged along the longitudinal direction of the bridge, and both ends of the second connecting rods are respectively connected to the two transverse distribution beams;

[0016] The second cross rod unit is in an X shape, and two sides thereof are respectively connected to two second connecting rods.

[0017] In combination with the first aspect, in one embodiment, the vertical force transmission structure includes a column and a column head and a column foot respectively arranged at the upper and lower ends of the column, and the column is used to support the jacking platform through the column head and is connected to the transverse distribution beam through the column foot.

[0018] In combination with the first aspect, in one embodiment, a third connection system is provided between the two columns located on the same side of the two transverse distribution beams, and the third connection system includes:

[0019] Two third connecting rods are arranged at intervals in the height direction, and two ends of the third connecting rods are respectively connected to the corresponding two columns;

[0020] The connecting oblique rod is located between the two third connecting rods, and two ends of the connecting oblique rod are respectively connected to the two third connecting rods.

[0021] In combination with the first aspect, in one embodiment, diagonal braces are respectively provided on both sides of the column along the transverse direction of the bridge, one end of the diagonal brace is connected to the column, and the other end is connected to the transverse distribution beam.

[0022] In a second aspect, an embodiment of the present application further provides a method for constructing a jacking support based on an existing bridge pier, which is used to construct the above-mentioned jacking support based on an existing bridge pier, and includes the following steps:

[0023] Move the pier top support force transmission structure between the existing pier column and the original bridge steel plate girder by hoisting, and connect it with the existing pier column;

[0024] The vertical force transmission structure is moved by hoisting to the two ends of the vertical projection range of the pier top support force transmission structure extending out of the existing pier column along the transverse direction of the bridge.

[0025] In combination with the second aspect, in one embodiment, the pier top support force transmission structure is moved between the existing pier column and the original bridge steel plate beam by hoisting, and connected with the existing pier column, including:

[0026] The transverse distribution beam is connected by a combination of a wire rope and a hand chain hoist. The wire rope is connected to the middle of the transverse distribution beam through a shackle. The hand chain hoist is connected to the wire rope, and a rotatable hook is installed between the wire rope and the hoist.

[0027] Tighten the hand chain hoist, lift the transverse distribution beam, move it to the installation point at a constant speed, lower the transverse distribution beam to the bottom of the original bridge steel plate beam, pull the guy rope to rotate the transverse distribution beam to be perpendicular to the original bridge steel plate beam, adjust the position of the transverse distribution beam, lower it to the top of the existing pier, and connect it to the existing pier;

[0028] The first connection system and the second connection system are lowered and connected with the transverse distribution beam.

[0029] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0030] When constructing the push-up support based on the existing bridge pier, the force transmission structure of the pier top support is moved between the existing pier column and the steel plate beam of the original bridge by hoisting, and connected to the existing pier column, and the vertical force transmission structure is moved to the two ends of the vertical projection range of the pier top support force transmission structure extending out of the existing pier column along the transverse bridge direction by hoisting. Since the force transmission structure of the pier top support is located between the existing pier column and the steel plate beam of the original bridge, and both ends extend out of the vertical projection range of the existing pier column along the transverse bridge direction, the vertical force transmission structure is arranged at the two ends of the vertical projection range of the pier top support force transmission structure extending out of the existing pier column along the transverse bridge direction, and can be arranged in a smaller space, with a simple structure, which solves the problem that the space-limited inclined push-up pier side support in the prior art needs to install a vertical support structure on the pedestal, and the requirement for the vertical space is large. When the pier column is too high, the height of the vertical support needs to be further increased, which has the problems of complex structure, troublesome installation, and waste of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of a jacking support based on an existing bridge pier according to the present invention.

[0033] Figure 2 It is a side structural schematic diagram of an embodiment of a jacking support based on an existing bridge pier of the present invention.

[0034] Figure 3 It is a schematic diagram of the top view of the structure of an embodiment of a jacking support based on an existing bridge pier of the present invention.

[0035] Figure 4 It is a structural schematic diagram of installing a transverse distribution beam in an embodiment of a jacking support construction method based on an existing bridge pier of the present invention.

[0036] Figure 5 It is a structural schematic diagram of installing a vertical force transmission structure in an embodiment of a jacking support construction method based on an existing bridge pier of the present invention.

[0037] Figure 6 It is a structural schematic diagram of installing a cushion beam in an embodiment of a jacking support construction method based on an existing bridge pier of the present invention.

[0038] In the figure: 1. force transmission structure of pier top support; 11. transverse distribution beam; 12. connection system; 121. first connection system; 1211. first connecting rod; 1212. first cross rod unit; 122. second connection system; 1221. second connecting rod; 1222. second cross rod unit; 13. embedded parts; 2. existing pier columns; 3. original bridge steel plate beam; 4. vertical force transmission structure; 41. column; 42. column head; 43. column foot; 44. diagonal brace; 5. existing support; 6. third connection system; 61. third connecting rod; 62. connecting diagonal rod; 7. cushion beam; 8. transport vehicle; 9. shoulder pole beam; 10. ballast block. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] The embodiment of the present application provides a jacking support and construction method based on existing bridge piers, which can solve the problem in the prior art that the space is limited and the inclined jacking pier side support needs to install a vertical support structure on the base, and the vertical space requirement is relatively large. When the pier column is too high, the height of the vertical support needs to be further increased, resulting in complex structure, troublesome installation, and waste of materials.

[0041] In the prior art, an existing support 5 is provided on the existing pier 2 , and the original bridge steel plate beam 3 is supported by the existing support 5 .

[0042] like Figure 1-Figure 3 As shown, on the one hand, the present application provides a jacking support based on an existing bridge pier, which includes:

[0043] The pier top support force transmission structure 1 is used to be arranged on the top of the existing pier column 2, and both ends extend out of the vertical projection range of the existing pier column 2 along the transverse direction of the bridge. The pier top support force transmission structure 1 is located between the existing pier column 2 and the original bridge steel plate beam 3;

[0044] The vertical force transmission structure 4 is arranged at both ends of the vertical projection range of the existing pier column 2 extending out of the pier top support force transmission structure 1 along the transverse direction of the bridge, and is located on the outside of the original bridge steel plate beam 3 along the transverse direction of the bridge. The vertical force transmission structure 4 is used to support the jacking platform.

[0045] When constructing the push-up support based on the existing bridge pier, the force transmission structure 1 of the pier top support is moved between the existing pier column 2 and the original bridge steel plate beam 3 by hoisting, and connected to the existing pier column 2, and the vertical force transmission structure 4 is moved to the two ends of the vertical projection range of the pier top support force transmission structure 1 extending out of the existing pier column 2 along the transverse bridge direction by hoisting. Since the force transmission structure 1 of the pier top support is located between the existing pier column 2 and the original bridge steel plate beam 3, and both ends extend out of the vertical projection range of the existing pier column 2 along the transverse bridge direction, the vertical force transmission structure 4 is arranged at the two ends of the vertical projection range of the pier top support force transmission structure 1 extending out of the existing pier column 2 along the transverse bridge direction, and can be arranged in a smaller space, with a simple structure, which solves the problem that the space-limited inclined push-up pier side support in the prior art needs to install a vertical support structure on the pedestal, and the requirement for the vertical space is large. When the pier column is too high, the height of the vertical support needs to be further increased, which has the problems of complex structure, troublesome installation, and waste of materials.

[0046] like Figure 1-Figure 3 As shown, in some optional embodiments, the pier top support force transmission structure 1 includes two transverse distribution beams 11 spaced apart along the longitudinal bridge direction, the two transverse distribution beams 11 are used to be set at both ends of the existing support 5, the lower side of the transverse distribution beam 11 is used to connect with the top of the existing pier 2, the two ends of the transverse distribution beam 11 extend out of the vertical projection range of the existing pier 2 along the transverse bridge direction, and the two ends of the transverse distribution beam 11 are provided with vertical force transmission structures 4.

[0047] In this embodiment, the structure of the pier top support force transmission structure 1 is specifically described. The pier top support force transmission structure 1 includes two transverse distribution beams 11 spaced apart along the longitudinal bridge direction. The two transverse distribution beams 11 are used to be set at both ends of the existing support 5. The lower side of the transverse distribution beam 11 is used to connect with the top of the existing pier 2. The two ends of the transverse distribution beam 11 extend out of the vertical projection range of the existing pier 2 along the transverse bridge direction. Both ends of the transverse distribution beam 11 are provided with vertical force transmission structures 4. The structure is simple, easy to install and easy to manufacture.

[0048] like Figure 3 As shown, in some optional embodiments, the pier top support force transmission structure 1 further includes a connection system 12 , which is disposed between the two transverse distribution beams 11 and is respectively connected to the two transverse distribution beams 11 .

[0049] In this embodiment, the pier top support force transmission structure 1 also includes a connection system 12, which is arranged between two transverse distribution beams 11 and respectively connected to the two transverse distribution beams 11, thereby strengthening the structural strength of the pier top support force transmission structure 1 and improving the safety of the jacking support based on the existing bridge piers.

[0050] like Figure 3As shown, in some optional embodiments, the connection system 12 includes a plurality of first connection systems 121, and the first connection systems 121 are located between adjacent existing supports 5, and the first connection systems 121 include:

[0051] Two first connecting rods 1211 are arranged in a transverse direction of the bridge at intervals. The first connecting rod 1211 is arranged in a longitudinal direction of the bridge, and both ends of the first connecting rod 1211 are respectively connected to the two transverse distribution beams 11;

[0052] Two first cross rod units 1212 are arranged along the longitudinal bridge direction. The first cross rod unit 1212 is X-shaped, and two sides are respectively connected to the two first connecting rods 1211.

[0053] In this embodiment, the connection system 12 includes multiple first connection systems 121, and the first connection system 121 is located between adjacent existing supports 5. The first connection system 121 includes two first connection rods 1211 and two first cross rod units 1212 arranged at intervals along the transverse bridge direction, wherein the first connection rod 1211 is arranged along the longitudinal bridge direction, and its two ends are respectively connected to two transverse distribution beams 11, and the two first cross rod units 1212 are arranged along the longitudinal bridge direction. The first cross rod unit 1212 is X-shaped, and its two sides are respectively connected to the two first connection rods 1211. It has a simple structure, is easy to manufacture, and has high structural stability, which further improves the safety of the jacking support based on the existing piers.

[0054] like Figure 3 As shown, in some optional embodiments, the connection system 12 further includes two second connection systems 122, which are respectively located at two ends of the transverse distribution beam 11 and correspond to the positions of the vertical force transmission structure 4. The second connection system 122 includes:

[0055] Two second connecting rods 1221 are arranged in a transverse direction of the bridge at intervals. The second connecting rod 1221 is arranged in a longitudinal direction of the bridge, and both ends of the second connecting rod 1221 are respectively connected to the two transverse distribution beams 11;

[0056] The second cross rod unit 1222 is in an X shape, and two sides thereof are respectively connected to the two second connecting rods 1221 .

[0057] In this embodiment, the connection system 12 also includes two second connection systems 122, which are respectively located at the two ends of the transverse distribution beam 11 and correspond to the position of the vertical force transmission structure 4. The second connection system 122 includes two second connection rods 1221 spaced apart along the transverse bridge direction and a second cross rod unit 1222, wherein the second connection rod 1221 is arranged along the longitudinal bridge direction, and its two ends are respectively connected to the two transverse distribution beams 11, and the second cross rod unit 1222 is X-shaped, and its two sides are respectively connected to the two second connection rods 1221, which has a simple structure, is easy to manufacture, and has high structural stability, which further improves the safety of the jacking support based on the existing piers.

[0058] like Figure 1-Figure 3 As shown, in some optional embodiments, the vertical force transmission structure 4 includes a column 41 and a column head 42 and a column foot 43 respectively arranged at the upper and lower ends of the column 41. The column 41 is used to support the jacking platform through the column head 42 and is connected to the transverse distribution beam 11 through the column foot 43.

[0059] In this embodiment, the structure of the vertical force transmission structure 4 is specifically described. The vertical force transmission structure 4 includes a column 41 and a column head 42 and a column foot 43 respectively arranged at the upper end and the lower end of the column 41. The column 41 is used to support the jacking platform through the column head 42, and is connected to the transverse distribution beam 11 through the column foot 43. The structure is simple and easy to manufacture.

[0060] In this example, a cushion beam 7 is provided at the upper ends of two columns 41 located on the same side of the two transverse distribution beams 11 , and the column heads 42 are connected to the cushion beam 7 .

[0061] like Figure 2 As shown, in some optional embodiments, a third connection system 6 is provided between two columns 41 located on the same side of two transverse distribution beams 11, and the third connection system 6 includes:

[0062] Two third connecting rods 61 are spaced apart in the height direction, and two ends of the third connecting rod 61 are respectively connected to the corresponding two upright posts 41;

[0063] The connecting oblique rod 62 is located between the two third connecting rods 61 , and both ends of the connecting oblique rod 62 are respectively connected to the two third connecting rods 61 .

[0064] In this embodiment, a third connection system 6 is provided between two columns 41 on the same side of the two transverse distribution beams 11. The third connection system 6 includes two third connection rods 61 spaced apart along the height direction and a connecting diagonal rod 62, wherein both ends of the third connection rod 61 are respectively connected to the corresponding two columns 41, the connecting diagonal rod 62 is located between the two third connection rods 61, and both ends of the connecting diagonal rod 62 are respectively connected to the two third connection rods 61. The structure is simple, easy to manufacture, and has high structural stability, which further improves the safety of the jacking support based on the existing piers.

[0065] like Figure 1 As shown, in some optional embodiments, diagonal braces 44 are respectively provided on both sides of the column 41 along the transverse direction of the bridge, and one end of the diagonal brace 44 is connected to the column 41 and the other end is connected to the transverse distribution beam 11.

[0066] In this embodiment, diagonal braces 44 are provided on both sides of the column 41 along the transverse direction of the bridge. One end of the diagonal brace 44 is connected to the column 41, and the other end is connected to the transverse distribution beam 11, thereby improving the stability of the column 41 and further improving the safety of the jacking support based on the existing bridge piers.

[0067] like Figure 3 As shown, in some optional embodiments, a plurality of embedded parts 13 are further included. The embedded parts 13 are used to be arranged on the top of the existing pier 2 and to connect the transverse distribution beam 11.

[0068] In this embodiment, the jacking support based on the existing bridge pier also includes a plurality of embedded parts 13, which are used to be arranged on the top of the existing pier column 2 and to be connected to the transverse distribution beam 11 for easy connection.

[0069] In some optional embodiments, the height of the pier top support force transmission structure 1 is less than the height of the existing support 5 .

[0070] In this embodiment, the height of the pier top support force transmission structure 1 is smaller than the height of the existing support 5 , so that the pier top support force transmission structure 1 can be conveniently placed between the existing pier column 2 and the original bridge steel plate beam 3 .

[0071] In this example, the pier top support force transmission structure 1 can also be filled with rigid materials to facilitate clamping and form a system that bears force together.

[0072] like Figure 1-Figure 6 As shown, on the other hand, the present application also provides a method for constructing a jacking support based on an existing bridge pier, which is used to construct the above-mentioned jacking support based on an existing bridge pier, and includes the following steps:

[0073] The pier top support force transmission structure 1 is moved between the existing pier column 2 and the original bridge steel plate beam 3 by hoisting, and connected to the existing pier column 2;

[0074] The vertical force transmission structure 4 is moved by hoisting to the two ends of the vertical projection range of the pier top support force transmission structure 1 extending out of the existing pier column 2 along the transverse direction of the bridge.

[0075] When constructing the push-up support based on the existing bridge pier, the force transmission structure 1 of the pier top support is moved between the existing pier column 2 and the original bridge steel plate beam 3 by hoisting, and connected to the existing pier column 2, and the vertical force transmission structure 4 is moved to the two ends of the vertical projection range of the pier top support force transmission structure 1 extending out of the existing pier column 2 along the transverse bridge direction by hoisting. Since the force transmission structure 1 of the pier top support is located between the existing pier column 2 and the original bridge steel plate beam 3, and both ends extend out of the vertical projection range of the existing pier column 2 along the transverse bridge direction, the vertical force transmission structure 4 is arranged at the two ends of the vertical projection range of the pier top support force transmission structure 1 extending out of the existing pier column 2 along the transverse bridge direction, and can be arranged in a smaller space, with a simple structure, which solves the problem that the space-limited inclined push-up pier side support in the prior art needs to install a vertical support structure on the pedestal, and the requirement for the vertical space is large. When the pier column is too high, the height of the vertical support needs to be further increased, which has the problems of complex structure, troublesome installation, and waste of materials.

[0076] In this case, before the pier top support force transmission structure 1 is moved between the existing pier 2 and the original bridge steel plate beam 3 by hoisting and connected to the existing pier 2, the top surface of the existing pier 2 should be leveled and debris and dust should be removed. Measure the installation and layout position of the embedded parts 13, drill holes and inject chemical anchoring agents, insert the embedded parts 13 and the chemical anchor bolts into the holes, ensure that the tops of the embedded parts 13 are horizontal, and the elevations of the embedded parts 13 are consistent. After the chemical anchor bolts are thoroughly anchored, the gap between the embedded parts 13 and the pier top concrete is filled with grouting, and after the grouting is completed and the final setting, rinse the concrete surface and remove debris.

[0077] In this example, the lifting method is to move the shoulder pole beam 9 through the transport vehicle 8, and the shoulder pole beam 9 is lifted by a steel wire rope. Ballast blocks 10 are provided at corresponding positions between the shoulder pole beam 9 and the transport vehicle 8.

[0078] In some optional embodiments, the pier top support force transmission structure 1 is moved between the existing pier column 2 and the original bridge steel plate beam 3 by hoisting, and connected with the existing pier column 2, including:

[0079] The transverse distribution beam 11 is connected by a combination of a wire rope and a hand chain hoist. The wire rope is connected to the middle part of the transverse distribution beam 11 through a shackle. The hand chain hoist is connected to the wire rope, and a rotatable hook is installed between the wire rope and the hoist.

[0080] Tighten the hand chain hoist, lift the transverse distribution beam 11, move it to the installation point at a constant speed, lower the transverse distribution beam 11 to the bottom of the original bridge steel plate beam 3, pull the guy rope to rotate the transverse distribution beam 11 to be perpendicular to the original bridge steel plate beam 3, adjust the position of the transverse distribution beam 11, lower it to the top of the existing pier 2, and connect it to the existing pier 2;

[0081] The first connection system 121 and the second connection system 122 are lowered and connected to the transverse distribution beam 11 .

[0082] In this embodiment, the installation process of the pier top support force transmission structure 1 is specifically described. The transverse distribution beam 11 is connected by a combination of a wire rope and a hand winch. The wire rope is connected to the middle part of the transverse distribution beam 11 through a shackle. The hand winch is then connected to the wire rope, and a rotatable hook is installed between the wire rope and the winch; the hand winch is tightened, the transverse distribution beam 11 is lifted, and moved to the installation point at a uniform speed, and the transverse distribution beam 11 is lowered to the bottom of the original bridge steel plate beam 3. The wind rope is pulled to rotate the transverse distribution beam 11 to be perpendicular to the original bridge steel plate beam 3, and the position of the transverse distribution beam 11 is adjusted, and it is lowered to the top of the existing pier 2 and connected to the existing pier 2; the first connection system 121 and the second connection system 122 are lowered and connected to the transverse distribution beam 11. The installation method is simple and the construction efficiency is improved.

[0083] In this example, after lowering the first connection system 121 and the second connection system 122 and connecting them to the transverse distribution beam 11, the vertical force transmission structure 4 is hoisted as a whole to both ends of the transverse distribution beam 11 and the cushion beam 7 is installed.

[0084] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the 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 the specific circumstances.

[0085] It should be noted that, in this 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0086] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent 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 the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A jacking support based on an existing bridge pier, characterized in that: include: A pier top support force transmission structure (1) is used to be arranged on the top of an existing pier column (2), and both ends extend out of the vertical projection range of the existing pier column (2) in the transverse direction of the bridge. The pier top support force transmission structure (1) is located between the existing pier column (2) and the original bridge steel plate beam (3); A vertical force transmission structure (4) is arranged at both ends of the vertical projection range of the pier top support force transmission structure (1) extending out of the existing pier column (2) along the transverse direction of the bridge, and is located on the outer side of the original bridge steel plate beam (3) along the transverse direction of the bridge. The vertical force transmission structure (4) is used to support the jacking platform.

2. The jacking support based on an existing bridge pier as claimed in claim 1, characterized in that: The pier top support force transmission structure (1) comprises two transverse distribution beams (11) arranged at intervals along the longitudinal bridge direction, the two transverse distribution beams (11) are used to be arranged at the two ends of the existing support (5), the lower side of the transverse distribution beam (11) is used to connect with the top of the existing pier column (2), the two ends of the transverse distribution beam (11) extend out of the vertical projection range of the existing pier column (2) along the transverse bridge direction, and the two ends of the transverse distribution beam (11) are provided with vertical force transmission structures (4).

3. The jacking support based on an existing bridge pier as claimed in claim 2, characterized in that: The pier top support force transmission structure (1) also includes a connection system (12), wherein the connection system (12) is arranged between the two transverse distribution beams (11) and is respectively connected to the two transverse distribution beams (11).

4. The jacking support based on an existing bridge pier as claimed in claim 3, characterized in that: The connection system (12) comprises a plurality of first connection systems (121), wherein the first connection systems (121) are located between adjacent existing supports (5), and the first connection systems (121) comprise: Two first connecting rods (1211) arranged at intervals along the transverse direction of the bridge, wherein the first connecting rod (1211) is arranged along the longitudinal direction of the bridge, and two ends of the first connecting rod (1211) are respectively connected to the two transverse distribution beams (11); Two first cross rod units (1212), the two first cross rod units (1212) are arranged along the longitudinal bridge direction, the first cross rod unit (1212) is X-shaped, and the two sides are respectively connected to the two first connecting rods (1211).

5. The jacking support based on an existing bridge pier as claimed in claim 4, characterized in that: The connection system (12) further comprises two second connection systems (122), the two second connection systems (122) being respectively located at two ends of the transverse distribution beam (11) and corresponding to the position of the vertical force transmission structure (4), the second connection system (122) comprising: Two second connecting rods (1221) arranged at intervals along the transverse direction of the bridge, wherein the second connecting rod (1221) is arranged along the longitudinal direction of the bridge, and two ends of the second connecting rod are respectively connected to the two transverse distribution beams (11); The second cross rod unit (1222) is in an X shape, and its two sides are respectively connected to the two second connecting rods (1221).

6. The jacking support based on an existing bridge pier as claimed in claim 2, characterized in that: The vertical force transmission structure (4) comprises a column (41) and a column head (42) and a column foot (43) respectively arranged at the upper end and the lower end of the column (41); the column (41) is used to support the jacking platform through the column head (42) and is connected to the transverse distribution beam (11) through the column foot (43).

7. The jacking support based on an existing bridge pier as claimed in claim 6, characterized in that: A third connection system (6) is provided between the two upright columns (41) located on the same side of the two transverse distribution beams (11), and the third connection system (6) comprises: Two third connecting rods (61) arranged at intervals in the height direction, wherein two ends of the third connecting rods (61) are respectively connected to two corresponding columns (41); The connecting oblique rod (62) is located between the two third connecting rods (61), and the two ends of the connecting oblique rod (62) are respectively connected to the two third connecting rods (61).

8. The jacking support based on an existing bridge pier as claimed in claim 6, characterized in that: The columns (41) are respectively provided with diagonal braces (44) on both sides along the transverse bridge direction; one end of the diagonal brace (44) is connected to the column (41), and the other end is connected to the transverse distribution beam (11).

9. A method for constructing a jacking support based on an existing bridge pier, characterized in that: The method for constructing a jacking support based on an existing bridge pier as claimed in any one of claims 1 to 8 comprises the following steps: The pier top support force transmission structure (1) is moved between the existing pier column (2) and the original bridge steel plate beam (3) by hoisting, and connected to the existing pier column (2); The vertical force transmission structure (4) is moved by hoisting to the two ends of the vertical projection range of the pier top support force transmission structure (1) extending out of the existing pier column (2) along the transverse bridge direction.

10. A method for constructing a jacking support based on an existing bridge pier as claimed in claim 9, characterized in that: The method of moving the pier top support force transmission structure (1) between the existing pier column (2) and the original bridge steel plate beam (3) by hoisting and connecting the pier top support force transmission structure (1) to the existing pier column (2) comprises: The transverse distribution beam (11) is connected by a combination of a steel wire rope and a hand chain hoist, the steel wire rope is connected to the middle part of the transverse distribution beam (11) through a shackle, the hand chain hoist is connected to the steel wire rope, and a rotatable hook is installed between the steel wire rope and the hoist; Tighten the hand chain hoist, lift the transverse distribution beam (11), move it to the installation point at a constant speed, lower the transverse distribution beam (11) to the bottom of the original bridge steel plate beam (3), pull the guy rope to rotate the transverse distribution beam (11) to be perpendicular to the original bridge steel plate beam (3), adjust the position of the transverse distribution beam (11), lower it to the top of the existing pier (2), and connect it to the existing pier (2); The first connection system (121) and the second connection system (122) are lowered and connected to the transverse distribution beam (11).

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