A temporary buttress suitable for the construction of vertical curved steel trusses

Abstract

The utility model provides a temporary pier suitable for the construction of vertical curved steel trusses, comprising a lower support member and an upper support member, wherein: one end of the lower support member is fixed on the ground, and the other end is fixedly connected to the upper support member; a walking jacking system is arranged on the top of the upper support member; a movable shoveling pad is arranged on the top of the walking jacking system; the utility model utilizes the walking jacking system arranged on the top of the upper support member, and the movable shoveling pad arranged on the top of the walking jacking system to adjust the elevation of the pier column top of the vertical curved steel truss during the jacking process, which can effectively prevent the pier top from being emptied when the vertical curved steel truss is jacked. The structure is safe and reliable, easy to operate manually, and can effectively ensure the jacking efficiency and construction accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a temporary buttress suitable for the construction of vertical curved steel trusses. Background Art

[0002] Temporary piers are used when assembling bridge cantilever or pushing bridge to reduce the cantilever length of the bridge during construction, meet the requirements of bridge anti-overturning stability and improve the stress state of the beam, thereby improving the safety during construction. The location and number of temporary piers set between permanent piers of the bridge are determined by calculation according to construction requirements.

[0003] During the vertical curve large-span steel truss jacking construction process, the overall stress conditions are complex and the process is cumbersome. With the continuous increase of the cantilever length, the reaction force of the permanent piers of the large-span jacking gradually increases. For the steel trusses, stress concentration and yield deformation are prone to occur, resulting in quality accidents; at the same time, for the permanent piers, it is also necessary to ensure that the structure meets the stress requirements when jacking to the maximum cantilever condition. At this time, in order to ensure the stability of the steel truss structure and the support force of the jacking pier, it is impossible to rely solely on the permanent pier body of the bridge. An additional support structure is required as a temporary fulcrum for the steel truss jacking construction, so that the steel truss will not be severely deformed during the jacking process, and the permanent piers will be subjected to smaller horizontal thrust and vertical pressure, ensuring the stability of the steel trusses and permanent piers, to ensure that the safety and quality requirements of the jacking construction are met.

[0004] As more and more steel trusses are designed with vertical curves, traditional temporary piers can only meet the needs of vertical jacking, horizontal forward movement, lateral correction, etc. during the jacking process of large-span steel trusses with vertical curves, but cannot meet the need to adjust the bottom elevation of vertical curve steel trusses during the jacking process of large-span steel trusses with vertical curves, that is, there is a risk of steel trusses falling off at the top of temporary piers. Summary of the invention

[0005] The utility model aims to provide a temporary pier suitable for the construction of vertical curved steel trusses, which solves the problem that the existing temporary piers cannot meet the adjustment of the bottom elevation of the vertical curved steel trusses during the jacking process of the vertical curved large-span steel trusses, resulting in the pier top being empty during the jacking process of the vertical curved steel trusses.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a temporary pier suitable for the construction of a vertical curved steel truss, comprising a lower support member and an upper support member, wherein:

[0008] One end of the lower support member is fixed on the ground, and the other end is fixedly connected to the upper support member;

[0009] The top of the upper support member is provided with a walking pushing system;

[0010] A movable cushion block is arranged on the top of the walking pushing system.

[0011] Preferably, the lower support structure comprises bored piles, a first steel pipe column, a first transverse connection system, and a first longitudinal distribution beam, wherein:

[0012] There are four bored piles, and a first steel pipe column is arranged above each bored pile;

[0013] Two first steel pipe columns arranged on the same side of the jacking direction are connected by a first longitudinal distribution beam;

[0014] The two first steel pipe columns arranged on the same side along the vertical pushing direction are connected via a first transverse connection system.

[0015] Preferably, the first transverse connection system is an inverted Z-shaped structure.

[0016] Preferably, the upper support structure comprises a second steel pipe column, a second transverse connection system, a longitudinal connection system, a second longitudinal distribution beam and a transverse distribution beam, wherein:

[0017] There are four second steel pipe columns, which are respectively fixed at four corners of the first longitudinal distribution beam and are placed above the first steel pipe column;

[0018] The second steel pipe columns arranged on the same side of the jacking direction are connected by a second longitudinal distribution beam;

[0019] The second steel pipe columns arranged on the same side along the vertical jacking direction are connected by a second transverse connection system.

[0020] Preferably, the second transverse connection system is a Z-shaped structure.

[0021] Preferably, both ends of the two second longitudinal distribution beams are connected by a transverse distribution beam.

[0022] Preferably, the first longitudinal distribution beam and the second longitudinal distribution beam arranged on the same side along the pushing direction are connected via a longitudinal connecting system.

[0023] Preferably, the walking push system comprises a slideway beam, a walking machine, a cushion block and a sliding block, wherein:

[0024] The two ends of the slideway beam are respectively fixed to the tops of two transverse distribution beams in the upper support structure;

[0025] A walking machine is provided at both ends of the slideway beam;

[0026] A cushion block is arranged at the output end of the vertical jack of each walker, and the two ends of the cushion block are arranged on two slideway beams;

[0027] A slider is also installed on the slideway beam, and the slider is placed between the two walkers;

[0028] The cushion block and the sliding block are both provided with movable cushion blocks.

[0029] Preferably, friction plates are arranged on the contact surfaces between the cushion block and the movable cushion block, between the slider and the movable cushion block, and between the cushion block and the vertical jack of the crawler.

[0030] Preferably, it also includes a working platform, which includes a manual operation platform and a gas station platform, wherein the manual operation platform is arranged along the four sides of the slideway beam; and the gas station platform is installed on the outer side of the steel truss beam.

[0031] Compared with the prior art, the beneficial effects of the utility model are:

[0032] The present embodiment provides a temporary pier suitable for the construction of vertical curved steel trusses, which utilizes a walking jacking system arranged on the top of an upper support member and a movable pad block arranged on the top of the walking jacking system to adjust the elevation of the pier top of the vertical curved steel truss during the jacking process, thereby effectively preventing the pier top from becoming empty when the vertical curved steel truss is jacked. The structure is safe and reliable, easy to operate manually, and can effectively ensure jacking efficiency and construction accuracy.

[0033] Furthermore, by applying butter on the slideway beam and setting a friction plate, it is ensured that the friction between the movable pad and the lower chord of the steel truss is greater than the friction between the slider and the slideway, and the pad and the slideway. This ensures that the point of force of the slider supporting the steel truss is always located at the node of the steel truss during the jacking process, thereby ensuring the smooth progress of the jacking.

[0034] Furthermore, the longitudinal connection system is used to cope with the horizontal thrust generated by the jacking of the steel beam, and the transverse connection system is used to resist the lateral impact force generated when the steel beam jacking process requires correction conditions, thereby improving the bearing capacity of the temporary pier and facilitating the stable installation of the temporary pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a diagram of the use state of the utility model;

[0036] Figure 2 It is a schematic diagram of the walking pushing system of the utility model;

[0037] Figure 3 This is a diagram of the use state of the treadmill of the treadmill pushing system of the utility model;

[0038] In the figure, 1-bored piles, 2-first steel pipe column, 3-first transverse connection system, 4-first longitudinal distribution beam, 5-second steel pipe column, 6-second transverse connection system, 7-longitudinal connection system, 8-second longitudinal distribution beam, 9-transverse distribution beam, 10-crawler pushing system, 11-working platform, 12-slideway beam, 13-crawler, 14-pad, 15-slider, 16-movable pad, 17-crawler placement platform, 18-friction plate. DETAILED DESCRIPTION

[0039] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0040] Example 1

[0041] The temporary pier provided in this embodiment is suitable for the construction of vertical curved steel trusses, which effectively solves the problem of the pier top being empty during the jacking process of the steel trusses, and can flexibly adjust the elevation of the pier top. It has a simple structure and is efficient and convenient to be used in the jacking construction process of vertical curved steel trusses. It can effectively ensure the smooth progress of the jacking construction and has good application prospects and promotion potential.

[0042] Specifically, it includes a lower support unit, an upper support unit and a walking jacking system arranged at a predetermined temporary pier position, wherein:

[0043] One end of the lower support member is fixed on the ground, and the other end is fixedly connected to the upper support member;

[0044] The top of the upper support member is provided with a walking pushing system;

[0045] A movable cushion block is arranged on the top of the walking pushing system.

[0046] Example 2

[0047] On the basis of Example 1, this embodiment provides a temporary pier suitable for the construction of a vertical curved steel truss beam, wherein the lower support structure includes a bored pile 1, a first steel pipe column 2, a first transverse connection system 3, and a first longitudinal distribution beam 4, wherein:

[0048] Four bored piles 1 are provided, and a first steel pipe column 2 is provided above each bored pile 1, and the two are fixedly connected.

[0049] The two first steel pipe columns 2 along the jacking direction are fixedly connected by a first longitudinal distribution beam 4; the two first steel pipe columns along the vertical jacking direction are fixedly connected by a first transverse connection system 3.

[0050] The first longitudinal distribution beam 4 is arranged on the top of a pair of first steel pipe columns arranged along the jacking direction and is fixedly connected by welding.

[0051] The first transverse connection system 3 is arranged in the upper middle part of the paired first steel pipe columns in the vertical jacking direction and is fixedly connected by welding.

[0052] The first transverse connection system 3 is an inverted Z-shaped structure, and the first transverse connection system 3 is fixed on the side wall of the first steel pipe column 2 to avoid the temporary pier damage caused by the bending moment caused by the transverse correction during the jacking process, and play a certain degree of triangular stabilization role.

[0053] Example 3

[0054] On the basis of Example 1, this embodiment provides a temporary pier suitable for the construction of a vertical curved steel truss beam, wherein the upper support structure includes a second steel pipe column 5, a second transverse connection system 6, a longitudinal connection system 7, a second longitudinal distribution beam 8 and a transverse distribution beam 9, wherein:

[0055] The second steel pipe columns 5 are arranged in two pairs along the jacking direction. The four second steel pipe columns are respectively fixed at the four corners of the first longitudinal distribution beam and placed above the first steel pipe column 2. The second steel pipe columns and the first longitudinal distribution beam 4 are fixedly connected by welding.

[0056] The second steel pipe columns arranged on the same side of the jacking direction are fixedly connected by a second longitudinal distribution beam 8;

[0057] The second steel pipe columns arranged on the same side along the vertical pushing direction are fixedly connected by a second transverse connection system 6 .

[0058] The second longitudinal distribution beam 8 is disposed on the top of the paired second steel pipe columns 5 arranged along the jacking direction and is fixedly connected by welding.

[0059] The second transverse connection system 6 is arranged in the upper middle part of the paired steel pipe columns in the vertical jacking direction and is fixedly connected by welding.

[0060] The second transverse connection system 6 is a Z-shaped structure, the upper end of the second transverse connection system 6 is fixed on the second longitudinal distribution beam 8, and the lower end of the second transverse connection system 6 is fixed on the side wall of the second steel pipe column 5, to avoid the temporary pier damage caused by the bending moment caused by the lateral correction during the jacking process, and to play a certain degree of triangular stabilization role. Here, the second transverse connection system 6 and the first transverse connection system 3, positive Z and reverse Z, are both reinforcement structures, forming multiple triangular stable structures to prevent the temporary pier from overturning.

[0061] Both ends of the two second longitudinal distribution beams are connected by a transverse distribution beam 9 , and the transverse distribution beam 9 is fixedly connected to the second longitudinal distribution beam 8 .

[0062] A longitudinal connection system 7 is provided between the first longitudinal distribution beam 4 and the second longitudinal distribution beam 8 which are arranged on the same side along the pushing direction.

[0063] The longitudinal connection system 7 is a triangular structure.

[0064] Example 4

[0065] On the basis of Example 1, this embodiment provides a temporary pier suitable for the construction of a vertical curved steel truss beam, wherein the walking jacking system includes a slide beam 12, a walking machine 13, a cushion block 14 and a slider 15, wherein:

[0066] The two ends of the slideway beam 12 are respectively fixed on the top of the two transverse distribution beams 9 .

[0067] A crawler placing platform 17 is provided at both ends of the slideway beam 12, and a crawler 13 is fixed on each crawler placing platform 17. The crawler is a three-way crawler capable of vertical lifting, longitudinal pushing, and lateral deviation correction.

[0068] A cushion block 14 is arranged directly above each walker 13 , and both ends of the cushion block 14 are fixedly mounted on the slideway beam 12 .

[0069] A slider 15 is also installed on the slide beam 12, and the slider 15 is placed between the two walkers;

[0070] The cushion block 14 and the sliding block 15 are both provided with movable cushion blocks 16 .

[0071] Friction plates are arranged on the contact surfaces between the cushion block 14 and the movable cushion block 16 , between the slider 15 and the movable cushion block 16 , and between the cushion block 14 and the vertical jack of the crawler 13 .

[0072] The contact surfaces between the cushion block 14 and the slideway beam 12 and between the slider 15 and the slideway beam 12 are all smeared with butter.

[0073] It also includes a working platform 11, which includes a manual operation platform and a gas station platform, wherein the manual operation platform is arranged along the four sides of the slideway beam; and the gas station platform is installed on the outer side of the steel truss beam.

[0074] Example 5

[0075] On the basis of Example 1, this example provides a temporary pier suitable for the construction of vertical curved steel trusses, wherein the movable cushion block comprises a cushion structure, the cushion structure comprises a plurality of cushion layers, and the plurality of cushion layers are orthogonally overlapped and combined from bottom to top.

[0076] The cushion layer comprises a plurality of assembly components, which are horizontally laid out and the assembly components of two adjacent layers are orthogonally overlapped.

[0077] The assembly component comprises two parallel connection plates, and a web is vertically arranged between the two connection plates.

[0078] There are at least two webs, and the two webs are arranged in parallel between two connecting plates.

[0079] Example 6

[0080] This embodiment provides a method for using a temporary pier suitable for the construction of a vertical curved steel truss beam, comprising the following steps:

[0081] Step 1: Installation of temporary piers

[0082] Temporary pier construction process: bored pile construction → installation of the first steel pipe column → installation of the first transverse connection system and the first longitudinal distribution beam → installation of the second steel pipe column → installation of the second longitudinal connection system and the second transverse connection system → installation of the transverse distribution beam → installation of the walking jacking system → installation of the manual operation platform

[0083] Step 2: Installation and commissioning of the step pushing system

[0084] (1) According to the requirements of pushing, select a walker of corresponding specifications, and install the walker placing platform and the walker at both ends of the slide beam according to the structural force requirements. The walker placing platform and the slide beam are fixedly connected by welding, and the walker and the placing platform are fixedly connected by welding; arrange the pad on the slide beam directly above the vertical jack of the walker, wherein a friction plate is set between the pad and the contact surface of the vertical jack of the walker for friction connection, and grease is applied between the pad and the contact surface of the slide beam for sliding connection, so as to realize horizontal pushing of the walker.

[0085] (2) Before the formal push, debug the walking machine equipment by first jogging and then linkage to ensure the coordination and synchronization of the walking machine push system.

[0086] 3 Pushing process

[0087] (1) Before pushing, install the slider on the slideway beam just below the steel truss node; apply butter between the slider and the slideway beam; set a friction plate between the slideway beam and the steel truss to establish a friction connection. Ensure that the slider is always at the steel truss node during the pushing process to achieve horizontal pushing of the crawler.

[0088] (2) First, jacking is performed. The crawler is set to jacking mode and high pressure control is adopted, i.e. 63 MPa (the value can be set according to the structural parameters of the steel truss and the actual situation on site). When the pressure is greater than 63 MPa, the oil station hardware overflow valve begins to overflow. The control system synchronously controls the extension cylinders of the vertical jacks of each crawler to jack up the steel truss to the predetermined elevation. The crawlers at both ends of the slideway beam bear most of the weight of the steel truss.

[0089] (3) After the lifting is completed, the crawler simultaneously releases the pressure, and the vertical piston retracts to the bottom of the beam to be empty. At this time, the weight of the steel beam is entirely borne by the slider.

[0090] (4) Then start pushing and set the crawler to push mode. The medium pressure control is used, that is, the maximum working pressure is 31.5Mpa (the value can be set according to the steel truss structure parameters and the actual situation on site), and the oil station hardware overflow valve is greater than 31.5Mpa overflow. The horizontal jack extension cylinders of each crawler are synchronously controlled by the control system. The friction between the crawler and the bottom of the steel truss is used to push the steel truss forward. At the same time, the slider follows the steel truss forward in linkage.

[0091] After a push is completed, the vertical jack of the crawler machine slowly retracts the cylinder, the main body of the steel truss falls on the slider, and the height of the movable pad above the crawler machine is adjusted to make the top support line of the pad in each push cycle of the crawler machine adapt to the bottom line of the steel truss. After the horizontal jack of the crawler machine retracts the cylinder and returns to the initial position, the next crawler machine push cycle can be entered.

[0092] After the jacking of one interval is completed, the crawler machines at both ends of the slide beam are used to lift the steel truss as a whole, so that the top of the movable pad block above the slider is emptied, the slider is pulled to the large-mileage jacking starting point of the slide beam, and the height of the movable pad block above the slider is adjusted to make the top support line shape of the slider in each interval jacking cycle adapt to the bottom line shape of the steel truss.

[0093] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A temporary pier suitable for the construction of vertical curved steel trusses, characterized in that: It comprises a lower support member and an upper support member, wherein: One end of the lower support member is fixed on the ground, and the other end is fixedly connected to the upper support member; The top of the upper support member is provided with a walking pushing system; A movable cushion block is arranged on the top of the walking pushing system.

2. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 1, characterized in that: The lower support member includes bored piles, a first steel pipe column, a first transverse connection system, and a first longitudinal distribution beam, wherein: There are four bored piles, and a first steel pipe column is arranged above each bored pile; Two first steel pipe columns arranged on the same side of the jacking direction are connected by a first longitudinal distribution beam; The two first steel pipe columns arranged on the same side along the vertical pushing direction are connected via a first transverse connection system.

3. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 2, characterized in that: The first transverse connection system is an inverted Z-shaped structure.

4. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 2, characterized in that: The upper support member includes a second steel pipe column, a second transverse connection system, a longitudinal connection system, a second longitudinal distribution beam and a transverse distribution beam, wherein: There are four second steel pipe columns, which are respectively fixed at four corners of the first longitudinal distribution beam and are placed above the first steel pipe column; The second steel pipe columns arranged on the same side of the jacking direction are connected by a second longitudinal distribution beam; The second steel pipe columns arranged on the same side along the vertical jacking direction are connected by a second transverse connection system.

5. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 4, characterized in that: The second transverse connection system is a Z-shaped structure.

6. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 4, characterized in that: Both ends of the two second longitudinal distribution beams are connected by a transverse distribution beam.

7. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 4, characterized in that: The first longitudinal distribution beam and the second longitudinal distribution beam arranged on the same side along the pushing direction are connected via a longitudinal connection system.

8. The temporary buttress suitable for the construction of vertical curved steel trusses according to claim 1, characterized in that: The walking push system includes a slideway beam, a walking machine, a cushion block and a sliding block, wherein: The two ends of the slideway beam are respectively fixed to the tops of two transverse distribution beams in the upper support structure; A walking machine is provided at both ends of the slideway beam; A cushion block is arranged at the output end of the vertical jack of each walker, and the two ends of the cushion block are arranged on two slideway beams; A slider is also installed on the slideway beam, and the slider is placed between the two walkers; The cushion block and the sliding block are both provided with movable cushion blocks.

9. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 8, characterized in that: Friction plates are arranged on the contact surfaces between the cushion block and the movable cushion block, between the slider and the movable cushion block, and between the cushion block and the vertical jack of the crawler.

10. A temporary buttress suitable for the construction of vertical curved steel trusses according to claim 8, characterized in that: It also includes a working platform, which includes a manual operation platform and a gas station platform, wherein the manual operation platform is arranged along the four sides of the slideway beam; and the gas station platform is installed on the outer side of the steel truss beam.

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