Support for construction of large cantilever bent cap and construction method

Abstract

The invention discloses a support for construction of a large cantilever bent cap and a construction method.The support comprises a supporting and adjusting module, the supporting and adjusting module comprises lower hoops arranged at the bottoms of pier studs on the two sides of the bent cap in the transverse bridge direction in a sleeving mode and upper hoops arranged at the preset positions of the pier studs in a sleeving mode, and the lower hoops are supported at the tops of straining beams between the pier studs; the lower hoop and the upper hoop are arranged on the base, the stand column assembly is arranged between the lower hoop and the upper hoop, a plurality of unloading blocks used for supporting or unloading are arranged on the top of the upper hoop, and the bearing module comprises assembling supporting frames arranged on the tops of the pier column unloading blocks respectively, a formwork arranged at the bottom of the bearing module and a protection module. The overall height of the support can be flexibly adjusted, construction requirements of capping beams with different pier column heights are met, elevation adjustment in the construction process is facilitated, the construction precision is ensured, capping beam support loads are directly transmitted to a tie beam through the supporting and adjusting module, non-elastic deformation between supports is reduced, and the construction efficiency is improved. The problem that the appearance of the pier column is damaged by a large-diameter pier column hoop or an embedded part is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge substructure construction, and more specifically, relates to a bracket and a construction method for large cantilever cap beam construction. Background Art

[0002] In urban bridge construction, large cantilever cap beam piers are often used to meet the requirements of aesthetics, permeability and clearance. This structural form can effectively reduce the obstruction of the landscape by the piers, while increasing the passage space under the bridge. Under some special construction conditions, such as limited construction sites and heavy traffic, the use of large cantilever cap beam structures can reduce interference with the construction site and improve construction efficiency. At the same time, this structural form can also reduce the impact on traffic to a certain extent and ensure smooth traffic during construction. The large cantilever cap beam structure can improve the overall aesthetics of the bridge through reasonable modeling and design while meeting functional requirements. At the same time, this structural form can also reduce construction and maintenance costs to a certain extent and improve the economy of the bridge.

[0003] Due to the large size of the cantilever cap beam structure, the cap beam construction generally adopts the hoop method, steel rod method and embedded parts method. As a common cap beam construction method, the hoop method has performed well in many small and medium-sized projects, but it has encountered considerable challenges when dealing with large columns. When the column diameter exceeds 2 meters, the contact area between the hoop and the column is relatively reduced, resulting in the friction between the two being insufficient to resist the internal force generated by external loads and temperature changes. Especially in areas with large temperature differences, due to the principle of thermal expansion and contraction, relative sliding is more likely to occur between the hoop and the column, which may not only cause safety accidents, but also have a serious impact on the overall stability and durability of the cap beam. The steel rod method and the embedded parts method have obvious deficiencies in the appearance protection and construction safety of the column. Both methods require holes to be reserved on the column or embedded parts to be installed, which will not only destroy the integrity of the column, affect its beauty and durability, but also increase the safety hazards during the construction process. Especially when performing high-altitude operations, these two methods pose a serious threat to the safety of construction workers due to the need to handle heavy materials and perform complex installation work. In addition, when using a few-support bracket for cap beam construction, although it can reduce the ground occupation to a certain extent, this method has very demanding requirements on the foundation. In order to ensure the stability and safety of the bracket, the foundation needs to be strictly reinforced and treated, which will not only increase construction costs and time, but also cause certain damage to the surrounding environment. Especially when the cantilever part occupies the original road, the erection of the bracket often requires interruption of traffic or destruction of the existing road, which will cause inconvenience to surrounding residents and traffic. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a bracket and construction method for the construction of a large cantilever cap beam. Through the coordinated use of the lower clamp, the upper clamp, the middle column assembly and the unloading block, the overall height of the bracket can be flexibly adjusted. It not only adapts to the needs of different pier heights and cap beam construction, but also facilitates the elevation adjustment during the construction process, ensures the construction accuracy, and provides a support adjustment module to directly transfer the cap beam bracket load to the tie beam, reducing the inelastic deformation between the brackets; it solves the problem of damage to the appearance of the pier by the clamp or embedded system of the large-diameter pier. The bracket system cleverly utilizes the structural characteristics of the pier and the tie beam, and does not need to occupy additional ground space to build the support structure. After the pier construction is completed, the land under the bridge can quickly restore its original function or be greened, greatly saving precious land resources.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, there is provided a support for the construction of a large cantilever cap beam, comprising a support adjustment module, which comprises a lower hoop sleeved at the bottom of the piers on both sides of the cap beam transverse bridge and an upper hoop sleeved at a preset position of the pier, and the lower hoop is supported on the top of the tie beam between the piers, and a column assembly is arranged between the lower hoop and the upper hoop, and the top of the upper hoop is provided with a plurality of unloading blocks for supporting or unloading;

[0006] The support bearing module comprises an assembly support frame respectively arranged on the top of the unloading block on both sides of the longitudinal bridge of each pier column, each assembly support frame comprises a lower cross beam, two parallel vertical support rods are fixedly installed in the middle of the lower cross beam, an upper cross beam is fixedly installed on the top of the vertical support rod, an oblique support rod is fixedly installed near the two ends of the lower cross beam, the top of each oblique support rod is fixedly connected to the end of the upper cross beam, a lower longitudinal beam is fixedly installed between the two ends of the lower cross beam on the assembly support frames on both sides of the longitudinal bridge of the pier column, and an upper longitudinal beam is fixedly installed between the outer ends of the upper cross beam;

[0007] And a template and protection module arranged at the bottom of the bracket bearing module, which includes a load-bearing beam arranged on the top of the upper longitudinal beam on both sides of the longitudinal bridge of the pier, an operating platform is arranged around the top of the load-bearing beam, a template support is arranged in the middle, guardrails are arranged around the operating platform, and a cap beam template is arranged on the top of the template support.

[0008] Furthermore, the lower hoop includes a plurality of lower hoop ring plates, the lower hoop ring plates are arc-shaped, and the plurality of arc-shaped lower hoop ring plates can be spliced ​​together to form a complete circular ring to surround the pier, so that the lower hoop ring plates can fit tightly to the surface of the pier, and the lower hoop ring plates are fixedly connected by a lower hoop connecting device.

[0009] Furthermore, the upper hoop is arranged at a preset position of the cap beam cross bridge toward the piers on both sides, and the upper hoop includes a plurality of upper hoop ring plates, the upper hoop ring plates are arc-shaped, and the plurality of arc-shaped upper hoop ring plates can be spliced ​​together to form a complete circular ring to surround the pier, so that the upper hoop ring plates can fit tightly to the surface of the pier, and the upper hoop ring plates are fixedly connected by an upper hoop connecting device.

[0010] Furthermore, the column assembly includes a plurality of columns arranged around the pier, the columns are fixedly connected to the lower clamp and the upper clamp by bolts, column parallel connections are arranged between the plurality of columns, and a group of column parallel connections is arranged every 4.5m or 5m.

[0011] Furthermore, the columns are prefabricated with standard lengths, and the column lengths include 10m, 5m, 3m, 2m, 1m, and 0.5m.

[0012] Furthermore, a support steel plate for leveling is provided between the column and the upper hoop.

[0013] Furthermore, the height to be adjusted is less than 0.5 meters and is adjusted with a unloading block.

[0014] Furthermore, geotextile is wrapped around the inner side of the upper hoop ring plate.

[0015] Furthermore, the assembly support frames on the piers on both sides are fixedly connected by connecting pieces, and an upper longitudinal beam is fixedly installed between the connecting pieces on both sides.

[0016] According to a second aspect of the present invention, there is provided a construction method for a support for large cantilever cap beam construction, comprising the following steps:

[0017] S100: first, clean the top of the tie beam between the bridge piers, install the lower hoop, and fix the lower hoop ring plate to the lower hoop connecting device;

[0018] S200: Calculate the required column length according to the pier column height, assemble using standard length columns, and adjust the required length using unloading blocks when it is less than 0.5m, then fix the column to the lower hoop;

[0019] S300: Install the upper hoop on the top of the column, wrap the geotextile inside the upper hoop, and level the upper hoop by supporting the steel plate;

[0020] S400: Assemble the truss bearing module at the construction site, install the truss bearing module on the top of the unloading block by crane, then install the load-bearing beam on the top of the truss bearing module, install the operating platform around the top of the load-bearing beam, install the template support in the middle, and install the guardrail around the operating platform, install the cap beam template on the top of the template support, and then carry out the cap beam construction;

[0021] S500: After the construction of the cap beam is completed, the truss bearing module, the formwork and the protection module are lowered and separated from the bottom of the cap beam through the unloading block;

[0022] S600: Pull out the supporting steel plate between the column assembly and the upper clamp, then remove the column assembly and the lower clamp respectively, symmetrically and slowly loosen the fastening bolts on the upper clamp, use the unloading block, truss bearing module, formwork and protection module to slide down to the bottom of the pier column under their own weight, and use a truck crane on the ground to disassemble the bracket components.

[0023] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0024] 1. The present invention is a bracket for the construction of a large cantilever cap beam. Through the coordinated use of the lower clamp, the upper clamp, the middle column assembly and the unloading block, the overall height of the bracket can be flexibly adjusted. It not only meets the requirements of different pier heights and cap beam construction, but also facilitates the elevation adjustment during the construction process, ensures the construction accuracy, and provides a support adjustment module to directly transfer the cap beam bracket load to the tie beam, reducing the inelastic deformation between the brackets; it solves the problem of damage to the appearance of the pier by the clamp or embedded system of the large-diameter pier.

[0025] 2. The present invention provides a support for the construction of a large cantilever cap beam. The support system cleverly utilizes the structural characteristics of piers and tie beams, and does not require additional ground space to build a supporting structure. After the pier construction is completed, the land under the bridge can quickly resume its original function or be greened, greatly saving precious land resources. Since the support system does not occupy excess land, the space under the bridge can be fully utilized. After the pier construction is completed, greening work under the bridge can be carried out immediately, such as planting grass and trees, realizing the greening-first concept of "piers like forests and grass under bridges".

[0026] 3. The support for the construction of a large cantilever cap beam of the present invention realizes rapid installation and disassembly of the support by optimizing the support structure design. Compared with traditional supports, the support system of the present invention reduces a large number of connectors and fasteners, making the installation process simpler and faster, and significantly improving the construction efficiency. The modular design of the support system allows each component to be easily disassembled and reassembled, which is convenient for reuse in different construction projects, which not only improves the turnover efficiency of the support, but also reduces resource waste and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a vertical layout diagram of a bracket used for the construction of a large cantilever cap beam according to an embodiment of the present invention;

[0028] Figure 2 This is a side view of a bracket for the construction of a large cantilever cap beam according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the lower hoop connection of a bracket used for the construction of a large cantilever cap beam according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the upper hoop connection of a bracket used for the construction of a large cantilever cap beam according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of column connection of a bracket used for construction of a large cantilever cap beam according to an embodiment of the present invention;

[0032] Figure 6 This is a truss elevation view of a support for the construction of a large cantilever cap beam according to an embodiment of the present invention;

[0033] Figure 7 A truss plan view of a support for the construction of a large cantilever cap beam according to an embodiment of the present invention;

[0034] Figure 8 The present invention is a flowchart of a support construction method for large cantilever cap beam construction according to an embodiment of the present invention.

[0035] In all the drawings, the same figure marks represent the same technical features, specifically: 1-lower hoop, 11-lower hoop connecting device, 12-lower hoop ring plate, 2-column assembly, 21-column, 22 column parallel connection, 3-upper hoop, 31-upper hoop connecting device, 32-upper hoop ring plate, 4-unloading block, 5-truss bearing module, 51-lower cross beam, 52-lower longitudinal beam, 53-upper cross beam, 54-upper longitudinal beam, 55-oblique support rod, 56-vertical support rod, 57-connecting part, 6-template and protection module, 61-load-bearing beam, 62-template support, 63-cap beam template, 64-operating platform. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] In this patent, the terms "include", "comprises" or any other variations 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 includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0040] Example 1

[0041] like Figure 1-7As shown, an embodiment of the present invention provides a support for the construction of a large cantilever cap beam, including a support and adjustment module, a truss bearing module 4, and a formwork protection module 5. The support and adjustment module includes a lower hoop 1 which is sleeved on the bottom of the piers on both sides and supported on the top of the tie beam between the piers. A column assembly 2 is provided on the top of the lower hoop 1. An upper hoop 3 is provided on the top of the column assembly 2. A plurality of unloading blocks 4 are provided on the top of the upper hoop 3 for height adjustment and unloading when the bracket is removed. The truss bearing module 5 is provided on the top of the unloading block 4. A formwork protection module 6 is provided on the top of the truss bearing module 5 for erecting the cap beam formwork and protecting the workers' construction safety. The present invention can realize flexible adjustment of the overall height of the bracket through the coordinated use of the lower hoop 1 and the upper hoop 3 in the support adjustment module, and the middle column assembly 2, which not only adapts to the needs of different pier heights and cap beam construction, but also facilitates the elevation adjustment during the construction process, ensuring the construction accuracy. The lower hoop 1 is set at the bottom of the piers on both sides and supported on the top of the tie beam between the piers, and the upper hoop 3 is set at the preset position of the piers on both sides, which enhances the stability of the bracket, improves the bearing capacity of the bracket, and ensures the safety during the construction process. The design of the unloading block 4 is not only used for elevation adjustment, but more importantly, it plays a key unloading role when the bracket is removed, making the removal process of the bracket more simple and efficient, reducing the construction difficulty and cost. The setting of the truss bearing module provides a solid bearing platform for the cap beam construction, and the template protection module is not only used to set up the cap beam template, but also plays an important role in protecting the safety of workers during construction. This design not only ensures the construction efficiency, but also ensures the safety of the construction personnel.

[0042] like Figure 1-5As shown, the support and adjustment module includes a lower hoop 1 and an upper hoop 3, the lower hoop 1 is arranged at the bottom of the piers on both sides of the cap beam cross bridge, and is supported on the top of the tie beam between the piers, the lower hoop 1 includes a plurality of lower hoop ring plates 12, the lower hoop ring plates 12 are arc-shaped, and a plurality of arc-shaped lower hoop ring plates 12 can be spliced ​​together to form a complete ring to surround the pier, so that the lower hoop ring plates 12 can fit tightly on the surface of the pier, and the lower hoop ring plates 12 are fixedly connected by a lower hoop connecting device 11; the upper hoop 3 is arranged at a preset position of the piers on both sides of the cap beam cross bridge, the upper hoop 3 includes a plurality of upper hoop ring plates 32, the upper hoop ring plates 32 are arc-shaped, and a plurality of arc-shaped upper hoop ring plates 32 can be spliced ​​together to form a complete ring to surround the pier, so that the upper hoop ring plates 32 can fit tightly on the surface of the pier, and the upper hoop ring plates 32 are fixedly connected by an upper hoop connecting device 31. The lower hoop 1 and the upper hoop 3 are formed by splicing a plurality of arc-shaped hoop ring plates, which can form a complete circular ring that fits tightly to the surface of the pier column, ensuring close contact between the hoop and the pier column, thereby improving the stability of the support. The plurality of hoop ring plates are fixedly connected by a hoop connecting device 11, which can increase the stability of the lower hoop 1 and the upper hoop 3, and can withstand various loads during the construction of the large cantilever cap beam. The installation and disassembly process of the lower hoop 1 and the upper hoop 3 is relatively simple and quick, which can save a lot of construction time. It is especially suitable for projects with tight schedules and can significantly improve construction efficiency. Compared with the traditional full-span support method, there is no need for large-scale treatment of the foundation, such as leveling the site, pouring concrete foundation, etc. The preparatory work before construction is greatly reduced, and the construction difficulty is lowered. The annular structure of the lower hoop 1 and the upper hoop 3 can evenly distribute the load on the surface of the pier column, avoiding stress concentration, thereby increasing the service life of the hoop and the pier column and reducing the risk of structural damage. In addition, it is reusable and can be recycled in multiple projects, reducing the overall consumption and cost of materials. The design and manufacturing can adopt the concepts of standardization and modularization to improve production efficiency and further reduce costs.

[0043] Furthermore, the support and adjustment module also includes a column assembly 2 arranged between the lower hoop 1 and the upper hoop 3, the column assembly 2 includes a plurality of columns 21 arranged around the pier, the columns 21 are fixedly connected to the hoop assembly 1 by bolts, column parallel connections 22 are arranged between the plurality of columns 21, and the column parallel connections 22 are arranged in a group every 4.5m or 5m. The column assembly 2 is arranged around the pier through a plurality of columns 21, and is fixedly connected with the lower hoop 1 and the upper hoop 3 by bolts, so as to form a stable support system. By arranging the column parallel connection 22 between each column 21, the connection strength between the columns is enhanced, and the overall stability of the entire support and adjustment module is improved. The lower hoop 1 and the upper hoop 3 are fixedly connected to the column 21 by bolts, so as to facilitate installation and disassembly. The components such as the column 21 and the column parallel connection 22 in the column assembly 2 can be reused, so as to reduce the overall consumption and cost of materials.

[0044] Furthermore, the column 21 is prefabricated with a standard length, and the length of the column 21 has different specifications such as 10m, 5m, 3m, 2m, 1m, and 0.5m. During construction, the height of the pier is calculated, and the columns 21 of different heights are fixedly connected in sequence to achieve the preset height. By combining the columns 21 of different heights, it is possible to flexibly cope with piers of various heights, ensuring that the support adjustment module can adapt to different construction requirements. The columns 21 of standard height are easy to assemble and disassemble quickly, reducing the time consumption during the construction process and improving the construction efficiency. The use of the columns 21 of standard height reduces the workload of on-site processing and measurement, reduces the difficulty and cost of construction, and the columns 21 of standard height can be reused, reducing the waste of materials, improving the utilization rate of materials, avoiding the need to customize columns of special heights, and reducing the cost of material procurement and processing. The columns 21 of standard height are easy to maintain and replace, reducing the maintenance cost and difficulty. The installation position and height of the upper clamp 3 can be achieved by adjusting the upper clamp connection device 31 and the column assembly 2, thereby meeting the elevation adjustment requirements under different construction conditions.

[0045] Furthermore, the support and adjustment module also includes a plurality of unloading blocks 4 arranged between the upper clamp 3 and the truss bearing module 5 at the preset position of the pier. When the height of the support and adjustment module that needs to be adjusted is lower than 0.5m, it can be adjusted through the unloading block 4; by adjusting the height of the unloading block 3, the support or unloading of the truss bearing module 5 can be achieved, with a high degree of automation and easy operation.

[0046] A circle of geotextile is wrapped around the inner side of the upper hoop ring plate 32, which can increase the friction coefficient between the hoop and the pier column, help improve the stability of the upper hoop 3, and ensure that the upper hoop 3 will not slide along the pier column under load. The use of geotextile can also protect the pier column, prevent the upper hoop 3 from directly contacting the pier column and possible damage, and protect the concrete surface of the pier column. Using geotextile to set a concrete slurry interception belt on the top of the upper hoop 3 can prevent the slurry from contaminating the pier body and keep the pier column clean and in good appearance.

[0047] like Figure 6-7 As shown, the truss bearing module 5 includes assembly support frames respectively arranged on the top of the unloading blocks 4 on both sides of each pier longitudinal bridge, each assembly support frame includes a lower cross beam 51, two parallel vertical support rods 56 are fixedly installed in the middle of the lower cross beam 51, an upper cross beam 53 is fixedly installed on the top of the vertical support rod 56, and an oblique support rod 55 is fixedly installed near the two ends of the lower cross beam 51, and the top of each oblique support rod 55 is fixedly connected to the end of the upper cross beam 53, a lower longitudinal beam 52 is fixedly installed between the two ends of the lower cross beam 51 on the assembly support frames on both sides of the pier longitudinal bridge, and the lower longitudinal beam 52 is supported on the top of the unloading block 4, the upper cross beams 53 of the assembly support frames on both sides of the pier are fixedly connected by connecting members 57, and upper longitudinal beams 54 are fixedly installed between the connecting members 57, and an upper longitudinal beam 54 is fixedly installed between the outer ends of the upper cross beam 53 on the assembly support frames on both sides of the pier longitudinal bridge.

[0048] Each assembly support frame forms a stable triangular structure through the lower crossbeam 51, the vertical support rod 56, the upper crossbeam 53 and the oblique support rod 55, which can effectively resist the load from all directions. The truss bearing module disperses the load to each support point through multiple assembly support frames, thereby avoiding the situation where a single point is subjected to excessive force, which helps to improve the bearing capacity of the entire structure. The setting of the lower longitudinal beam 52 and the upper longitudinal beam 54 further enhances the overall rigidity of the truss bearing module, and connects each assembly support frame to form a continuous and stable support system. The various components of the truss bearing module (such as the lower crossbeam 51, the vertical support rod 56, the upper crossbeam 53, etc.) can be produced in a standardized manner, which helps to reduce production costs and improve production efficiency. The various components are connected by bolts or other quick connectors, so that the truss bearing module can be quickly assembled and disassembled, which helps to improve construction efficiency and shorten construction period. The design of the truss bearing module enables each component to make full use of materials and reduce material waste. At the same time, standardized production also helps to improve material utilization.

[0049] like Figure 1-2As shown, the template and protection module 6 includes a load-bearing beam 61 arranged at the top of the upper longitudinal beam 54 on both sides of the pier column longitudinal bridge direction, an operating platform 64 is arranged around the top of the load-bearing beam 61, a template support 62 is arranged in the middle, a guardrail is arranged around the operating platform 64, and a cap beam template 63 is arranged on the top of the template support 62; the load-bearing beam 61 is arranged at the top of the upper longitudinal beam 64 on both sides of the pier column longitudinal bridge direction, providing a solid support foundation for the entire template and protection module, ensuring stability during the construction process, and the template support 62 is located in the middle of the top of the load-bearing beam 61, used to support and fix the cap beam template 63. This design enables the template to be quickly and accurately positioned and installed, thereby shortening the construction period, the operating platform 64 is arranged around the top of the load-bearing beam 61, providing a spacious and stable working space for construction personnel, and the operating platform 64 is provided with guardrails around the periphery, effectively preventing construction personnel from falling from a height, ensuring safety during the construction process.

[0050] Example 2

[0051] Combination Figure 1-5 ,like Figure 6 As shown, the present invention provides a construction method of a bracket for large cantilever cap beam construction, comprising the following steps:

[0052] S100: First, clean the top of the tie beam between the bridge piers, install the lower hoop 1, and fix the lower hoop ring plate 12 through the lower hoop connecting device 11;

[0053] S200: Calculate the required length of the column 21 according to the height of the pier, assemble the column 21 with the standard length, adjust it by the unloading block 4 when the required length is less than 0.5m, and then fix the column 21 to the lower hoop 1;

[0054] S300: Install the upper hoop 3 on the top of the column 21, wrap the geotextile inside the upper hoop 3, and level the upper hoop 3 by supporting the steel plate;

[0055] S400: Assemble the truss bearing module 5 at the construction site, install the truss bearing module 5 on the top of the unloading block 4 by crane, then install the load-bearing beam 61 on the top of the truss bearing module 5, install the operating platform 64 around the top of the load-bearing beam 61, install the template support 62 in the middle, install the guardrail around the operating platform 64, install the cap beam template 63 on the top of the template support 62, and then carry out the cap beam construction;

[0056] S500: After the cap beam construction is completed, the truss bearing module 5 and the template and protection module 6 are lowered and separated from the bottom of the cap beam through the unloading block 4;

[0057] S600: Pull out the supporting steel plate between the column assembly 2 and the upper clamp 3, then remove the column assembly 2 and the lower clamp 1 respectively, symmetrically and slowly loosen the fastening bolts on the upper clamp 3, slide down to the bottom of the pier using the deadweight of the unloading block 4, the truss bearing module 5, the formwork and the protection module 6, and disassemble the bracket components on the ground using a truck crane.

[0058] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bracket for the construction of a large cantilever cap beam, characterized in that: include: A support adjustment module, comprising a lower hoop (1) sleeved on the bottom of the piers on both sides of the cap beam cross bridge and an upper hoop (3) sleeved on the preset position of the piers, wherein the lower hoop (1) supports the top of the tie beam between the piers, and a column assembly (2) arranged between the lower hoop (1) and the upper hoop (3), and a plurality of unloading blocks (4) for supporting or unloading are arranged on the top of the upper hoop (3); The support bearing module (5) comprises an assembly support frame respectively arranged on the top of the unloading block (4) on both sides of the longitudinal bridge of each pier column, each assembly support frame comprises a lower cross beam (51), two parallel vertical support rods (56) are fixedly installed in the middle of the lower cross beam (51), an upper cross beam (53) is fixedly installed on the top of the vertical support rod (56), an oblique support rod (55) is fixedly installed near both ends of the lower cross beam (51), and the top of each oblique support rod (55) is fixedly connected to the end of the upper cross beam (53), a lower longitudinal beam (52) is fixedly installed between the two ends of the lower cross beam (51) on the assembly support frames on both sides of the longitudinal bridge of the pier column, and an upper longitudinal beam (54) is fixedly installed between the outer ends of the upper cross beam (53); And a template and protection module (6) arranged at the bottom of the support bearing module (5), which includes a load-bearing beam (61) arranged at the top of the upper longitudinal beam (54) on both sides of the pier longitudinal bridge, an operating platform (64) is arranged around the top of the load-bearing beam (61), a template support member (62) is arranged in the middle, guardrails are arranged around the operating platform (64), and a cap beam template (63) is arranged on the top of the template support member (62).

2. A bracket for the construction of a large cantilever cap beam according to claim 1, characterized in that: The lower hoop (1) comprises a plurality of lower hoop ring plates (12), the lower hoop ring plates (12) are arc-shaped, and the plurality of arc-shaped lower hoop ring plates (12) can be spliced ​​together to form a complete ring to surround the pier column, so that the lower hoop ring plates (12) can fit tightly to the surface of the pier column, and the lower hoop ring plates (12) are fixedly connected by a lower hoop connecting device (11).

3. A bracket for the construction of a large cantilever cap beam according to claim 1, characterized in that: The upper hoop (3) is arranged at a preset position of the piers on both sides of the cap beam transverse bridge, and the upper hoop (3) comprises a plurality of upper hoop ring plates (32), the upper hoop ring plates (32) are arc-shaped, and the plurality of arc-shaped upper hoop ring plates (32) can be spliced ​​together to form a complete ring to surround the pier, so that the upper hoop ring plates (32) can fit tightly to the surface of the pier, and the upper hoop ring plates (32) are fixedly connected by an upper hoop connecting device (31).

4. A bracket for the construction of a large cantilever cap beam according to claim 1, characterized in that: The column assembly (2) comprises a plurality of columns (21) arranged around the pier column, the columns (21) being fixedly connected to the lower hoop (1) and the upper hoop (3) by bolts, column parallel connections (22) being arranged between the plurality of columns (21), and a group of column parallel connections (22) being arranged every 4.5 m or 5 m.

5. A support for the construction of a large cantilever cap beam according to claim 4, characterized in that: The columns (21) are prefabricated in standard lengths, and the lengths of the columns (21) are 10m, 5m, 3m, 2m, 1m, and 0.5m.

6. A support for the construction of a large cantilever cap beam according to claim 5, characterized in that: A support steel plate for leveling is provided between the upright column (21) and the upper hoop (3).

7. A bracket for the construction of a large cantilever cap beam according to any one of claims 1 to 6, characterized in that: If the height to be adjusted is less than 0.5 m, the unloading block (4) is used for adjustment.

8. A support for the construction of a large cantilever cap beam according to any one of claims 1 to 6, characterized in that: The inner side of the upper hoop ring plate (32) is wrapped with a geotextile.

9. A support for the construction of a large cantilever cap beam according to any one of claims 1 to 6, characterized in that: The assembly support frames on the piers on both sides are fixedly connected via connecting pieces (57), and an upper longitudinal beam (54) is fixedly installed between the connecting pieces (57) on both sides.

10. A construction method for a bracket used for construction of a large cantilever cap beam according to any one of claims 1 to 9, characterized in that: The steps include: S100: First, clean the top of the tie beam between the bridge piers, install the lower hoop (1), and fix the lower hoop ring plate (12) through the lower hoop connecting device (11); S200: Calculate the required length of the column (21) according to the height of the pier column, assemble using columns (21) of standard length, adjust the required length by using the unloading block (4) when it is less than 0.5m, and then fix the column (21) to the lower hoop (1); S300: Install the upper hoop (3) on the top of the column (21), wrap the geotextile inside the upper hoop (3), and level the upper hoop (3) by supporting the steel plate; S400: Assemble the truss bearing module (5) at the construction site, install the truss bearing module (5) on the top of the unloading block (4) by crane, then install the load-bearing beam (61) on the top of the truss bearing module (5), install the operating platform (64) around the top of the load-bearing beam (61), install the template support (62) in the middle, install the guardrail around the operating platform (64), install the cap beam template (63) on the top of the template support (62), and then carry out the cap beam construction; S500: After the construction of the cap beam is completed, the truss bearing module (5) and the formwork and protection module (6) are lowered and separated from the bottom of the cap beam through the unloading block (4); S600: Pull out the supporting steel plate between the column assembly (2) and the upper clamp (3), then remove the column assembly (2) and the lower clamp (1) respectively, symmetrically and slowly loosen the fastening bolts on the upper clamp (3), and use the self-weight of the unloading block (4), the truss bearing module (5) and the template and protection module (6) to slide down to the bottom of the pier column, and use a truck crane on the ground to disassemble the bracket components.

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