Bottom die supporting system for side span closure section of continuous rigid frame bridge

Abstract

The utility model relates to a continuous rigid frame bridge side span closure section bottom die supporting system, which belongs to the technical field of bridge construction, and comprises a bracket bracket connected to the outer wall of the upper part of a bridge abutment; the hanging basket system is installed on the main span of the continuous rigid frame bridge and used for building the main span, and the hanging basket system is provided with a front lower cross beam; the distributive girder is installed on the corbel bracket, the end, away from the bridge abutment, of the distributive girder is in lap joint with the front lower cross beam, the distributive girder is used for laying a bottom die of the closure section, the partial section, away from the bridge abutment, of the bottom die extends to the position below the cast-in-place section of the main span, and the connecting piece is connected with the bottom die and the cast-in-place section of the main span. And the partial section, deviating from the bridge abutment, of the bottom die is fixedly connected to the bottom surface of the cast-in-place section of the main span. By means of the structure, the supporting system can better support the bottom plate of the closure section, by means of an existing hanging basket system on the main span, the erecting work of the whole supporting system is simpler and more convenient, the construction cost is lower, the construction time is shorter, and fewer materials are used.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and specifically relates to a bottom formwork support system for the closure section of a continuous rigid frame bridge side span. Background Technology

[0002] With increasing travel demands, many remote scenic spots, towns, and villages require more roads to facilitate travel for tourists and residents. However, many such locations often involve crossing large rivers or existing national highways. In these cases, long-span bridges are the optimal choice, with continuous rigid frame bridges being a frequently used form. A continuous rigid frame bridge is a continuous beam bridge where the piers and the bridge structure are rigidly connected. The bridge mainly consists of a main span and side spans at both ends of the main span. The main span is built on the piers, and the construction process primarily relies on hanging baskets to support the steel formwork. The side spans are built on abutments, and the construction process relies on brackets installed on the abutments to support the steel formwork. The main span and side spans are connected by a closure section. Currently, there are three main construction methods for the closure section:

[0003] The first method is to erect a full-span scaffold below the location where closure is required, and then lay the steel formwork for the closure section on the full-span scaffold. The second method is to install corbel brackets on both the abutments and piers, and use the corbel brackets to install the steel formwork for the closure section. The third method is to use a hanging system erected on the cast-in-place section of the main span to support the steel formwork for the closure section.

[0004] The above three methods can only use one form to support the steel formwork of the closure section and the weight of the closure section. Therefore, each method requires the erection of a structure with sufficient load-bearing capacity. The construction of the steel formwork support system is complicated, time-consuming, and requires a lot of materials. Utility Model Content

[0005] This utility model provides a bottom formwork support system for the closure section of a continuous rigid frame bridge, which solves the technical problems of the current bottom formwork support system for the closure section of a continuous rigid frame bridge being troublesome to construct, time-consuming, and requiring a lot of materials.

[0006] This utility model is achieved through the following technical solution: a bottom formwork support system for the closure section of a continuous rigid frame bridge side span, comprising:

[0007] The corbel bracket is connected to the upper outer wall of the bridge abutment;

[0008] A hanging basket system is installed on the main span of the continuous rigid frame bridge and used to construct the main span. The hanging basket system is equipped with a front lower crossbeam.

[0009] The distribution beam is installed on the corbel bracket, with one end of the distribution beam away from the abutment overlapping the front lower crossbeam, and the distribution beam is used to lay the bottom formwork of the closure section.

[0010] Furthermore, to better realize this utility model, the bracket includes:

[0011] The bracket is installed on the upper outer wall of the bridge abutment;

[0012] A support frame is installed on the corbel and connected to the upper part of the bridge abutment;

[0013] Several sand cylinders are installed on the support frame, and a section of the distribution beam near the abutment overlaps on several of the sand cylinders.

[0014] Furthermore, in order to better realize this utility model, a number of steel sections are installed on the distribution beam, the steel sections are padded between the bottom formwork and the distribution beam, and the number of steel sections are sequentially distributed between the bridge abutment and the front lower crossbeam.

[0015] Furthermore, in order to better realize this utility model, the distribution beam and the front lower crossbeam are fixed together by welding.

[0016] Furthermore, in order to better realize this utility model, it also includes:

[0017] A connector is provided, wherein a portion of the bottom formwork facing away from the abutment extends to the bottom of the cast-in-place section of the main span, and the connector connects the bottom formwork and the cast-in-place section of the main span, so that the portion of the bottom formwork facing away from the abutment is fixedly connected to the bottom surface of the cast-in-place section of the main span.

[0018] Furthermore, in order to better realize this utility model, the connecting member is an anchoring structure, and the part of the bottom formwork that is away from the bridge abutment is anchored to the bottom surface of the cast-in-place section of the main span through the anchoring structure.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] The bottom formwork support system for the side span closure section of the continuous rigid frame bridge provided by this utility model includes a corbel bracket, a hanging basket system, and a distribution beam. The corbel bracket is connected to the upper outer wall of the abutment and is used to construct the side span of the continuous rigid frame bridge on the abutment. The hanging basket system is installed on the main span of the continuous rigid frame bridge and is used to construct the main span. The hanging basket system is equipped with a front lower crossbeam. The distribution beam is installed on the corbel bracket. The end of the distribution beam away from the abutment overlaps with the front lower crossbeam, and the distribution beam is used to lay the bottom formwork of the closure section.

[0021] With the above structure, the support system simultaneously supports the distribution beam by means of the corbel brackets installed on the abutment and the hanging basket system already installed on the main span of the bridge. Then, the bottom formwork of the closure segment is installed on the distribution beam. In this way, the weight of the closure segment is distributed to the corbel brackets and the hanging basket system, and transferred to the abutment through the corbel brackets and to the main span through the hanging basket system. Therefore, the support system provided by this utility model has a greater load-bearing capacity, thus better supporting the bottom formwork of the closure segment. In addition, since the support system uses the hanging basket system already installed on the main span, when erecting the support system, it is only necessary to install the corbel brackets on the upper part of the abutment, and then install the distribution beam between the corbel brackets and the lower front crossbeam of the hanging basket system. The operation is simple and convenient, less material is required for erection, the cost is lower, and the erection time of this support system is shorter, reducing the construction cost of the bridge. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of the bottom formwork support system for the side span closure section of a continuous rigid frame bridge provided in this embodiment of the invention;

[0024] Figure 2 yes Figure 1 A magnified view of region A in the image.

[0025] In the picture:

[0026] 100-Corner bracket, 110-Corner, 120-Support frame, 130-Sand cylinder, 200-Hanging basket system, 210-Front lower crossbeam, 300-Distribution beam, 310-Steel section, 400-Bottom formwork, 500-Abutment, 600-Side span, 700-Main span, 710-Cast-in-place section, 800-Closing section, 900-Anchorage structure. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Example:

[0029] like Figures 1-2 As shown, the bottom formwork support system for the side span closure section of the continuous rigid frame bridge provided in this embodiment includes a corbel bracket 100, a hanging basket system 200, and a distribution beam 300, wherein:

[0030] The corbel bracket 100 is connected to the upper outer wall of the abutment 500. The hanging basket system 200 is installed on the main span 700 of the continuous rigid frame bridge and is used for the construction of the main span 700. The hanging basket system 200 is equipped with a front lower crossbeam 210. The distribution beam 300 is installed on the corbel bracket 100. The end of the distribution beam 300 away from the abutment 500 overlaps with the front lower crossbeam 210, and the distribution beam 300 is used to lay the bottom formwork 400 of the closure section 800. It is worth noting that the above-mentioned distribution beam 300 is actually a support beam, and there are multiple of them. Multiple distribution beams 300 jointly support the formwork of the closure section 800. In the actual construction process, the above-mentioned distribution beam 300 can also be understood as part of the corbel bracket 100. In addition, the above-mentioned hanging basket system 200 is the same as the existing technology, so it will not be described in detail here. In addition to the aforementioned front lower crossbeam 210, the hanging basket system 200 is also equipped with a rear lower crossbeam, cantilever, base, and suspension structure.

[0031] Through the above structure, the support system simultaneously supports the distribution beam 300 with the help of the corbel bracket 100 installed on the abutment 500 and the hanging basket system 200 already installed on the main span 700. Then, the bottom formwork 400 of the closure segment 800 is installed on the distribution beam 300. In this way, the weight of the closure segment 800 is distributed to the corbel bracket 100 and the hanging basket system 200, and transferred to the abutment 500 through the corbel bracket 100, and to the main span 700 through the hanging basket system 200. Therefore, the support system provided in this embodiment... With a greater load-bearing capacity, it better supports the bottom formwork 400 of the closure segment 800. Furthermore, this support system utilizes the existing hanging basket system 200 installed on the main span 700. Therefore, when erecting this support system, it is only necessary to install the corbel bracket 100 on the upper part of the abutment 500, and then install the distribution beam 300 between the corbel bracket 100 and the lower front crossbeam 210 of the hanging basket system 200. This is simple and convenient to operate, requires less material, and has lower costs. Moreover, the erection time required for this support system is shorter, reducing the construction cost of the bridge. It should be noted that because this support system has a stronger load-bearing capacity, compared to the technology that only uses the corbel bracket 100 to install the bottom formwork 400 of the closure segment 800, a smaller model of corbel bracket 100 can be used in this embodiment, thus also saving costs.

[0032] The aforementioned corbel bracket 100 can be a support for the side span 600 of a continuous rigid frame bridge built on the abutment 500, or it can be a support installed on the abutment 500 when the closure section 800 needs to be poured.

[0033] Optionally, the aforementioned bracket 100 includes a bracket 110, a support frame 120, and several sand cylinders 130, wherein:

[0034] The corbel 110 is installed on the upper outer wall of the abutment 500. It should be noted that the corbel 110 is a professional term in the bridge construction industry and is not a leg on a cow.

[0035] The support frame 120 is installed on the corbel 110 and connected to the upper part of the abutment 500. Specifically, the support frame 120 includes a vertical rod, a diagonal rod, and a horizontal top rod. The bottom end of the vertical rod is fixedly connected to the corbel 110. The horizontal top rod is connected to the top end of the vertical rod, and the end of the horizontal top rod near the abutment 500 is connected to the upper part of the abutment 500. The diagonal rod is connected between the horizontal top rod and the vertical rod. The diagonal rod, the horizontal top rod, and the vertical rod form a triangular support structure. Components for strengthening the structure are also installed between the diagonal rod, the horizontal top rod, and the vertical rod. The vertical rod is riveted to the outer wall of the abutment 500 by anchor bolts.

[0036] Several sand cylinders 130 are installed on the support frame 120, and a section of the distribution beam 300 near the abutment 500 overlaps with several sand cylinders 130. Specifically, several steel sections 310 are installed on the distribution beam 300, and the steel sections 310 are placed between the bottom formwork 400 and the distribution beam 300. Furthermore, the steel sections 310 are distributed sequentially between the abutment 500 and the front lower crossbeam 210.

[0037] To enhance the stability of the connection between the distribution beam 300 and the front lower crossbeam 210, the distribution beam 300 and the front lower crossbeam 210 are fixed by welding in this embodiment. Of course, the "welding" mentioned here is actually spot welding.

[0038] More preferably, a section of the bottom formwork 400 facing away from the abutment 500 extends below the cast-in-place section 710 of the main span 700, and a connector connects the bottom formwork 400 and the cast-in-place section 710 of the main span 700, so that the section of the bottom formwork 400 facing away from the abutment 500 is fixedly connected to the bottom surface of the cast-in-place section 710 of the main span 700. Optionally, the connector is an anchoring structure 900, and the section of the bottom formwork 400 facing away from the abutment 500 is anchored to the bottom surface of the cast-in-place section 710 of the main span 700 by the anchoring structure 900.

[0039] In this way, the weight of the bottom formwork 400 will be directly transferred to the cast-in-place section 710 of the main span 700 through the aforementioned connectors. Thus, the corbel bracket 100, the hanging basket system 200, and the cast-in-place section 710 of the main span 700 collectively support the weight of the bottom formwork 400 and the closure section 800, thereby providing better support for the bottom formwork 400 of the closure section 800. Furthermore, in this configuration, the load distributed to the corbel bracket 100 is smaller; therefore, a smaller model can be selected, further reducing the material usage and cost of the corbel bracket 100.

[0040] Of course, the aforementioned connectors can also be bolted connections, as long as they can connect the portion of the bottom formwork 400 that is away from the abutment 500 to the bottom surface of the cast-in-place section 710 of the main span 700 of the bridge.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A bottom formwork support system for the closure section of a continuous rigid frame bridge side span, characterized in that, include: A corbel bracket (100) is connected to the upper outer wall of the bridge abutment (500); A hanging basket system (200) is installed on the main span (700) of the continuous rigid frame bridge and is used to construct the main span (700). The hanging basket system (200) is equipped with a front lower crossbeam (210). A distribution beam (300) is installed on the bracket (100). One end of the distribution beam (300) away from the abutment (500) is attached to the front lower crossbeam (210). The distribution beam (300) is used to lay the bottom formwork (400) of the closure section (800).

2. The bottom formwork support system for the side span closure section of a continuous rigid frame bridge according to claim 1, characterized in that, The bracket (100) includes: A corbel (110) is installed on the upper outer wall of the bridge abutment (500); A support frame (120) is installed on the corbel (110) and connected to the upper part of the bridge abutment (500); Several sand cylinders (130) are installed on the support frame (120), and a section of the distribution beam (300) near the bridge abutment (500) overlaps on several of the sand cylinders (130).

3. The bottom formwork support system for the side span closure section of a continuous rigid frame bridge according to claim 2, characterized in that: A plurality of steel sections (310) are installed on the distribution beam (300), the steel sections (310) are padded between the bottom formwork (400) and the distribution beam (300), and the plurality of steel sections (310) are sequentially distributed between the abutment (500) and the front lower crossbeam (210).

4. The bottom formwork support system for the side span closure section of a continuous rigid frame bridge according to claim 3, characterized in that: The distribution beam (300) and the front lower crossbeam (210) are fixed together by welding.

5. The bottom formwork support system for the side span closure section of a continuous rigid frame bridge according to any one of claims 1-4, characterized in that, Also includes: A connector is provided, wherein a portion of the bottom formwork (400) facing away from the abutment (500) extends to the bottom of the cast-in-place section (710) of the main span (700), and the connector connects the bottom formwork (400) and the cast-in-place section (710) of the main span (700) so that the portion of the bottom formwork (400) facing away from the abutment (500) is fixedly connected to the bottom surface of the cast-in-place section (710) of the main span (700).

6. The bottom formwork support system for the side span closure section of a continuous rigid frame bridge according to claim 5, characterized in that: The connector is an anchoring structure (900), and a section of the bottom formwork (400) facing away from the abutment (500) is anchored to the bottom surface of the cast-in-place section (710) of the main span (700) through the anchoring structure (900).

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