Bridge side span cast-in-place steel pipe supporting system with rigid base

Abstract

The utility model discloses a bridge side span cast-in-place steel pipe supporting system with a rigid base, which comprises a steel pipe support main body, a bearing platform and a pier stud, the steel pipe support main body is vertically arranged, the bottom of the steel pipe support main body is connected with the rigid base, and the rigid base is used as a base of the steel pipe support main body and directly bears load transmitted by the support; the rigid base is firmly welded to the bearing platform through the bearing platform embedded steel plate, and when the bearing platform is constructed, the bearing platform embedded steel plate is embedded in the bearing platform to serve as an embedded part for connecting the bearing platform and the rigid base. An upper layer supporting frame used for supporting a formwork is arranged on the top of the steel pipe support body, and the steel pipe support body is connected with a built pier column through a wall connecting piece. According to the bridge side span cast-in-place steel pipe supporting system with the rigid base, the rigid base is arranged, loads are transmitted to the bearing platform, the problem of soft foundation settlement is effectively solved, the construction quality and safety are improved, and the bridge side span cast-in-place steel pipe supporting system has wide application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a cast-in-situ steel pipe support system for the side span of a bridge with a rigid base. Background Technique

[0002] Bridges are an important part of road traffic. When encountering places such as rivers and canyons where ordinary roads are difficult to pass, building a bridge is a common solution. A continuous rigid frame cast-in-situ viaduct is a common type of bridge. The side span cast-in-situ construction is a part of the continuous rigid frame cast-in-situ viaduct construction. During construction, it is necessary to support the formwork through a support system and cast the deck part of the bridge through the formwork, thereby completing the construction of the entire bridge. The current support systems for the side span cast-in-situ construction of continuous rigid frame viaducts are mainly full hall formwork supports or full hall column formwork support systems. Regardless of which support system, the original foundation needs to be treated before erection to ensure that the bearing capacity and stability of the foundation meet the project requirements. After the support system is erected, the forces generated during the cast-in-situ of the bridge (mainly the gravity of the concrete) are transmitted layer by layer downward through the formwork and the support, and finally transmitted to the foundation under the bridge. Therefore, the erection of the support system depends greatly on the site conditions under the bridge. The better the site conditions under the bridge, the lower the cost; the worse the site conditions under the bridge, the higher the cost, and even construction may be impossible due to the influence of certain conditional factors.

[0003] In actual projects, due to the existence of soft foundations, the construction of the side span cast-in-situ section often faces many challenges, such as foundation settlement, support deformation, concrete cracks, etc. These problems not only affect the construction progress and quality, but may also pose potential safety hazards to the later use of the bridge. The currently commonly used solution is to spend a large amount of manpower and material resources on measures such as replacing and reinforcing the foundation, which delays the construction period and has a high cost. Therefore, it is necessary to design a cast-in-situ steel pipe support system for the side span of a bridge to effectively solve the problems faced during construction on soft foundations and improve the construction quality and safety. Summary of the Invention

[0004] The purpose of the utility model is to provide a cast-in-situ steel pipe support system for the side span of a bridge with a rigid base. By setting a rigid base, this cast-in-situ steel pipe support system for the side span of a bridge effectively solves the problem of soft foundation settlement, improves the construction quality and safety, and has a wide application prospect.

[0005] The utility model adopts the following technical solutions:

[0006] A cast-in-situ steel pipe support system for the side span of a bridge with a rigid base, comprising a steel pipe support main body, a bearing platform and a pier column. The steel pipe support main body is vertically arranged, and a rigid base is connected to the bottom of the steel pipe support main body. The rigid base serves as the base of the steel pipe support main body and directly bears the load transmitted from the support. The rigid base is firmly welded to the bearing platform through a pre-embedded steel plate of the bearing platform to ensure that the base remains firm and does not deviate during the force-bearing process. During the construction of the bearing platform, the pre-embedded steel plate of the bearing platform is pre-embedded in the bearing platform as a pre-embedded part for connecting the bearing platform and the rigid base. An upper support frame for supporting the formwork is arranged at the top of the steel pipe support main body. The steel pipe support main body is connected to the already completed pier column through a coupling member. The coupling member adopts a commonly used coupling member in building construction and is purchased and installed for use.

[0007] Further preferably: The steel pipe support main body includes a plurality of vertically parallel steel pipe columns. Adjacent two steel pipe columns are connected by a connecting rod. In order to make the connection more stable, the connecting rod adopts a horizontal connecting rod and a diagonal bracing connecting rod. Connection flanges are arranged at both ends of the steel pipe column. When connecting vertically and increasing the height, the steel pipe columns are connected by flange bolts. The steel pipe support main body is erected conventionally and can be connected by welding or flange bolts. The steel pipe columns are connected into a whole through a steel pipe connection system to form a steel pipe support to bear the force together.

[0008] Further preferably: The connecting rod is made of an I-beam or a channel steel and is fixedly connected to the steel pipe column by welding or bolt connection.

[0009] Further preferably: The rigid base includes a plurality of longitudinally arranged longitudinal beams. Adjacent two longitudinal beams are connected by a cross beam. The longitudinal beam and the cross beam are fixed by welding or bolt connection in the form of setting flange plates at the ends. When using bolt connection, flange plates are arranged at both ends of the cross beam, and butt flange plates are arranged at the corresponding installation positions of the longitudinal beam for bolt connection. The longitudinal beam and the cross beam are connected to form a stable base to ensure that the base has longitudinal and transverse stiffness. The longitudinal beam spacing of the rigid base should match the transverse distance of the steel pipe column. The longitudinal beam of the rigid base and the steel pipe column can be connected by flange bolts or welding; the specific form can be determined according to the connection form of the support main body.

[0010] Further preferably: The longitudinal beam is composed of a plurality of I-beams or channel steels spliced together to improve the stiffness; the number and size of the I-beams or channel steels can be adjusted according to the actual situation to meet different load requirements.

[0011] The cast-in-situ steel pipe support system for the side span of the bridge with a rigid base effectively solves the problem of soft foundation settlement by setting a rigid base to transfer the load to the bearing platform, improves the construction quality and safety, and has a wide application prospect. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the working state of the cast-in-situ steel pipe support system for the side span of a bridge with a rigid base;

[0013] Figure 2 It is a schematic diagram of the connection structure between the main body of the steel pipe support and the rigid base;

[0014] Figure 3 It is a schematic diagram of the structure of the main body of the steel pipe support;

[0015] Figure 4 It is a schematic diagram of the structure of the rigid base;

[0016] Figure 5 It is a schematic diagram of the connection structure between the rigid base and the bearing platform;

[0017] The names corresponding to the serial numbers in the figure are:

[0018] 1. Main body of the steel pipe support; 1-1. Steel pipe column; 1-2. Connector; 2. Rigid base; 2-1. Longitudinal beam; 2-2. Cross beam; 3. Upper support frame; 4. Wall connecting member; 5. Bearing platform; 6. Embedded steel plate of the bearing platform; 7. Pier column; 8. Soft stratum. Specific implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0020] As Figures 1-5 shown, a cast-in-situ steel pipe support system for the side span of a bridge with a rigid base includes a main body 1 of the steel pipe support, a bearing platform 5 and a pier column 7. The main body 1 of the steel pipe support is vertically arranged, and the bottom of the main body 1 of the steel pipe support is connected with a rigid base 2. The rigid base 2 serves as the base of the main body 1 of the steel pipe support and directly bears the load transmitted from the support. The rigid base 2 is firmly welded to the bearing platform 5 through an embedded steel plate 6 of the bearing platform. During the construction of the bearing platform, the embedded steel plate of the bearing platform is embedded in the bearing platform as the embedded part for connecting the bearing platform and the rigid base. An upper support frame 3 for supporting the formwork is arranged at the top of the main body 1 of the steel pipe support, and the main body 1 of the steel pipe support is connected to the built pier column 7 through a wall connecting member 4.

[0021] The steel pipe support main body 1 includes several steel pipe columns 1-1, and the steel pipe columns 1-1 are connected by connecting rods 1-2. The connecting rods 1-2 can be made of I-beams or channel steels and are fixed on the steel pipe columns 1-1 by welding or bolt connection.

[0022] The rigid base 2 includes longitudinal beams 2-1 and cross beams 2-2. The longitudinal beams are composed of multiple I-beams or channel steels through connection to improve the stiffness; the quantity and size of the I-beams or channel steels can be adjusted according to the actual situation to meet different load requirements. The longitudinal beams 2-1 and the cross beams 2-2 can be fixed by welding or bolt connection in the form of setting flange plates at the ends. When using the bolt connection method, flange plates are arranged at both ends of the cross beam 2-2, and butt flange plates are arranged at the corresponding installation positions of the longitudinal beams 2-1 for bolt connection.

[0023] The spacing arrangement of the longitudinal beams 2-1 of the rigid base 2 should match the transverse distance of the steel pipe columns 1-1. The longitudinal beams 2-1 of the rigid base 2 and the steel pipe columns 1-1 can be connected by flange plate bolt connection or welding; the specific form can be determined according to the connection form of the support main body.

[0024] The construction process of the cast-in-situ steel pipe support system for the side span of the bridge with a rigid base is as follows:

[0025] Step 1: When constructing the bearing platform 5, the embedded steel plate 6 of the rigid base 2 is embedded in the bearing platform 5.

[0026] Step 2: Flange plates are welded on the upper parts of the longitudinal beams 2-1 of the rigid base 2, and can be bolt-connected with the flange plates of the steel pipe columns 1-1 of the steel pipe support main body 1. Install the steel pipe columns 1-1 on the rigid base 2, and connect the steel pipe columns 1-1 into a whole through the connecting pieces 1-2 to form the steel pipe support main body 1. Since a part of the support is above the soft stratum 8, the soft stratum 8 cannot bear the excessive upper load mass. The rigid base 2 can transfer the load from the steel pipe support main body 1 to the concrete bearing platform 5 through the longitudinal beams 2-1 to ensure the stability of the construction.

[0027] Step 3: Install the upper support frame 3 above the steel pipe support main body 1, and firmly connect the steel pipe support main body 1 with the already built pier column 7 through the connecting wall members 4.

[0028] In this embodiment, the steel pipe support main body 1 on the rigid base 2 is assembled by bolts with flange plates. The upper support frame installed thereon directly bears the upper load and then transfers it to the rigid base in turn, so that the bearing platform bears the pressure from the upper load. The soft stratum 8 does not participate in the force-bearing process of the support during the process. During the construction process, regularly inspect and maintain the steel pipe support to ensure its stability and safety.

[0029] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A cast-in-place steel pipe support system for a bridge side span with a rigid base, comprising a steel pipe support body (1), a cap (5) and a pier (7), characterized in that: The steel pipe support body (1) is vertically arranged, and a rigid base (2) is connected to the bottom of the steel pipe support body (1), and the rigid base (2) serves as the base of the steel pipe support body (1); the rigid base (2) is firmly welded to the base (5) through the pre-embedded steel plate (6) of the base; an upper support frame (3) for supporting the formwork is arranged on the top of the steel pipe support body (1), and the steel pipe support body (1) is connected to the built pier (7) through the wall connecting piece (4).

2. The cast-in-place steel pipe support system for bridge side spans with a rigid base according to claim 1, characterized in that: The steel pipe support body (1) comprises a plurality of steel pipe columns (1-1) arranged vertically and in parallel, and two adjacent steel pipe columns (1-1) are connected by a connecting rod (1-2).

3. The cast-in-place steel pipe support system for bridge side spans with a rigid base according to claim 2, characterized in that: The connecting rod (1-2) is made of I-beam or channel steel and is fixedly connected to the steel pipe column (1-1) by welding or bolt connection.

4. The cast-in-place steel pipe support system for bridge side spans with a rigid base according to claim 1, characterized in that: The rigid base (2) comprises a plurality of longitudinal beams (2-1) arranged in parallel, two adjacent longitudinal beams (2-1) are connected by a cross beam (2-2), and the longitudinal beams (2-1) and the cross beams (2-2) are fixed by welding or by bolt connection in the form of flanges at the ends; when the bolt connection is adopted, flanges are provided at both ends of the cross beam (2-2), and a butt flange is provided at the corresponding installation position of the longitudinal beam (2-1).

5. The cast-in-place steel pipe support system for bridge side span with a rigid base according to claim 4, characterized in that: The longitudinal beam (2-1) is formed by splicing a plurality of I-beams or channel steels.

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