Connecting joint structure of front supporting type grouting steel pipe and enclosing purlin reinforcing steel bar

Abstract

The utility model discloses a connecting node structure of a front supporting type grouting steel pipe and an enclosing purlin steel bar. The connecting node structure comprises a node lap joint plate, the front supporting type grouting steel pipe and the enclosing purlin steel bar. A through hole is formed in the joint lap joint plate, the front supporting type grouting steel pipe penetrates through the joint lap joint plate through the through hole, and the outer wall of the front supporting type grouting steel pipe and the periphery of the hole wall of the through hole are fixed in a full welding mode. The two sides of the joint lap joint plate extend towards the enclosing purlin, and the plate face of the joint lap joint plate and the cut-off enclosing purlin steel bar are located in the same plane, so that the cut-off position of the enclosing purlin steel bar can be fixedly connected to the joint lap joint plate in a lap joint mode. The utility model relates to the technical field of building construction, and can solve the problems that in the prior art, lap joint steel bars and purlin steel bars are difficult to connect, and the requirement for weld joint quality is high.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a connection node structure between a front-supported grouting steel pipe and waler reinforcement. Background Technology

[0002] During underground structure construction, walers provide lateral protection for the foundation pit, while grouting pipes are used to transport grout for concrete pouring. When the front-supported grouting pipes 2 are arranged, they often pass through the area where the walers are located. Therefore, the arrangement of the front-supported grouting pipes 2 will cut off the waler reinforcement 3, as shown in the attached diagram. Figure 1 As shown, this affects the protective effect of the walers.

[0003] For the connection between the front-supported grouting steel pipe and the waler reinforcement, the conventional construction process is as follows: bend the cut waler reinforcement and weld lapped reinforcement bars 4 onto the front-supported grouting steel pipe. After the front-supported grouting steel pipe is arranged, weld the lapped reinforcement bars to the bent portion of the waler reinforcement to ensure a reliable connection between the front-supported grouting steel pipe and the waler reinforcement, thereby ensuring the safety of concrete grouting construction and the effectiveness of foundation pit protection. However, this construction process has the following technical problems:

[0004] 1. Errors are inevitable during the actual installation of the front-supported grouting steel pipe, making it impossible to ensure that the lapped reinforcing bars and the waler reinforcing bars are aligned. This leads to difficulties in connecting the lapped reinforcing bars and the waler reinforcing bars, and affects the reliability of the connection between the front-supported grouting steel pipe and the waler reinforcing bars.

[0005] 2. The front-supported grouting steel pipe is relatively large and generally requires 8 lapped steel bars to connect with the waler steel bars. Each lapped steel bar and the waler steel bars are connected by full welding, which is time-consuming and labor-intensive, and requires a high level of welding skills from the construction personnel. The quality of the weld is difficult to control.

[0006] Therefore, there is a need to provide a connection node structure between the front-supported grouting steel pipe and the waler reinforcement, which can solve the problems of difficulty in connecting lapped reinforcement and waler reinforcement and high requirements for weld quality in the existing technology. Summary of the Invention

[0007] The purpose of this utility model is to provide a connection node structure between the front-supported grouting steel pipe and the waler reinforcement, which can solve the problems of difficulty in connecting lapped reinforcement and waler reinforcement and high requirements for weld quality in the prior art.

[0008] This utility model is implemented as follows:

[0009] A connection node structure for a front-supported grouting steel pipe and waler reinforcement includes a node lap plate, a front-supported grouting steel pipe, and waler reinforcement. A through hole is formed on the node lap plate, through which the front-supported grouting steel pipe passes. The outer wall of the front-supported grouting steel pipe is fully welded to the wall of the through hole. Both sides of the node lap plate extend towards the waler, and the surface of the node lap plate is in the same plane as the cut-off waler reinforcement, so that the cut-off part of the waler reinforcement can be fixedly lapped on the node lap plate.

[0010] The through hole has a near-elliptical structure, allowing the inclined front-supported grouting steel pipe to pass through it at an angle.

[0011] The weld leg height at the weld between the wall of the through hole and the front-supported grouting steel pipe shall not be less than 6mm.

[0012] The length of the node lap plate is greater than the total width of the cut waler reinforcement bars, so that the cut waler reinforcement bars are all fixed to the node lap plate by double-sided welding.

[0013] The lap length of the waler reinforcement and the node lap plate shall not be less than 5 times the diameter of the waler reinforcement, and the weld leg height at the welded joint of the waler reinforcement and the node lap plate shall not be less than 6mm.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] 1. This utility model features a node lap plate with through holes. The node lap plate is fitted onto the front-supported grouting steel pipe through the through holes, and the through holes of the node lap plate are fully welded to the front-supported grouting steel pipe and the two sides of the node lap plate to the waler reinforcement. The node lap plate satisfies the reliable connection requirements between the front-supported grouting steel pipe and the waler reinforcement, which helps to improve the construction quality and efficiency of the connection node between the front-supported grouting steel pipe and the waler reinforcement.

[0016] 2. This utility model features a node lap plate with through holes. The node lap plate is fitted onto the front-supported grouting steel pipe through the through holes and can move flexibly along the front-supported grouting steel pipe. This can meet the connection requirements of the waler reinforcement and the front-supported grouting steel pipe at different heights. At the same time, the shape and size of the through holes can be used to make the node lap plate meet the connection requirements of the waler reinforcement and the front-supported grouting steel pipe at different angles. The construction process is simple and easy to operate, with high adaptability, reducing the construction difficulty, welding workload and the requirements for the welding skills of construction personnel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection node between the existing front-supported grouting steel pipe and the waler reinforcement.

[0018] Figure 2This is a three-dimensional view of the connection node structure between the front-supported grouting steel pipe and the waler reinforcement of this utility model;

[0019] Figure 3 This is a top view of the connection node structure between the front-supported grouting steel pipe and the waler reinforcement of this utility model.

[0020] In the figure, 1 is the node lap plate, 11 is the through hole, 2 is the front-supported grouting steel pipe, 3 is the waler reinforcement, and 4 is the lapped reinforcement. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Please see the appendix Figure 2 and attached Figure 3 A connection node structure for a front-supported grouting steel pipe and a waler reinforcement bar includes a node lap plate 1, a front-supported grouting steel pipe 2, and a waler reinforcement bar 3. A through hole 11 is formed on the node lap plate 1, through which the front-supported grouting steel pipe 2 passes. The outer wall of the front-supported grouting steel pipe 2 is fully welded to the hole wall of the through hole 11. Both sides of the node lap plate 1 extend towards the waler, and the plate surface of the node lap plate 1 and the cut-off waler reinforcement bar 3 are located in the same plane, so that the cut-off part of the waler reinforcement bar 3 can be fixedly lapped on the node lap plate 1.

[0023] Preferably, the node lap plate 1 can be made of the same material as the front-supported grouting steel pipe 2. The node lap plate 1 can be made of various shapes such as circular plates or rectangular plates with a thickness of 10mm. The size of the through hole 11 is slightly larger than the size of the cross-section where the front-supported grouting steel pipe 2 penetrates the node lap plate 1. The through hole 11 is located in the middle of the node lap plate 1, so that the node lap plate 1 is subjected to uniform stress and the connection is reliable.

[0024] The node lap plate 1 provides a welding surface for the waler reinforcement 3. Compared with traditional lap reinforcement, it can better control the welding quality and ensure the effective connection between the node lap plate 1 and the front-supported grouting steel pipe 2 and the waler reinforcement 3.

[0025] Meanwhile, the node lap plate 1 can be sleeved onto the front-supported grouting steel pipe 2 through the through hole and moved to the cut-off point of the waler reinforcement 3. The lap requirements of the waler reinforcement 3 at different locations can be met. There is no need to weld the lap reinforcement in advance. The welding of the through hole of the node lap plate 1 and the front-supported grouting steel pipe 2 is simpler and requires less welding. It can reduce the amount of welding work while ensuring reliable connection, and also requires less welding skills from the construction personnel.

[0026] The through hole 11 has a near-elliptical structure, allowing the inclined front-supported grouting steel pipe 2 to pass through the through hole 11 at an angle.

[0027] Typically, the front-supported grouting steel pipe 2 is arranged at an angle, and the through hole 11 can be adapted to be formed according to the angle of inclination and outer diameter of the front-supported grouting steel pipe 2.

[0028] The surface of the node lap plate 1 is determined based on the plane where the waler main reinforcement 3 is located. The size, shape, and position of the through hole 11 can be determined based on the size and inclination angle of the front-supported grouting steel pipe 2. Thus, different shapes and sizes of through holes 11 can accommodate the connection requirements of the waler main reinforcement 3 and the front-supported grouting steel pipe 2 at different positions and angles. The structural form of the node lap plate 1 and its through hole 11 is determined by modeling with existing building software. It can be fabricated on-site, which is simpler than the traditional construction method of welding lapped reinforcement and has good adaptability to different construction conditions.

[0029] The weld leg height at the weld between the wall of the through hole 11 and the front-supported grouting steel pipe 2 is not less than 6mm, ensuring a reliable connection between the node lap plate 1 and the front-supported grouting steel pipe 2.

[0030] The length of the node lap plate 1 is greater than the total width of the cut waler reinforcement bars 3, so that the cut waler reinforcement bars 3 are all fixed to the node lap plate 1 by double-sided welding.

[0031] The size of the node lap plate 1 can be adaptively adjusted according to the area of ​​the cut waler reinforcement 3 to ensure that all the cut waler reinforcement 3 can be welded to the node lap plate 1.

[0032] The lap length between the waler reinforcement 3 and the node lap plate 1 shall not be less than 5 times the diameter of the waler reinforcement 3, and the weld leg height at the welded joint of the waler reinforcement 3 and the node lap plate 1 shall not be less than 6mm, so as to ensure the reliability of the connection between the node lap plate 1 and the waler reinforcement 3.

[0033] Please see the appendix Figure 2 and attached Figure 3 The construction method of this utility model for the connection node between the front-supported grouting steel pipe and the waler reinforcement is as follows:

[0034] Using a steel plate as the node lap plate 1, the opening size of the through hole 11 on the node lap plate 1 is first determined by modeling based on the diameter of the front-supported grouting steel pipe 2 and the angle of insertion into the foundation, and then the node lap plate 1 is processed according to the model.

[0035] In use, insert the node lap plate 1 through one end of the front-supported grouting steel pipe 2, adjust the height of the node lap plate 1 along the length of the front-supported grouting steel pipe 2 until it is below the waler reinforcement 3 to be connected, and after determining the height, fully weld the node lap plate 1 and the front-supported grouting steel pipe 2 around the through hole 11. Finally, place the cut waler reinforcement 3 on the node lap plate 1, and connect and fix the waler reinforcement 3 to the node lap plate 1 by double-sided welding, so that the waler reinforcement 3 and the front-supported grouting steel pipe 2 are reliably connected.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A connection node structure between a front-supported grouting steel pipe and waler reinforcement, characterized in that: It includes a node lap plate (1), a front-supported grouting steel pipe (2), and waler reinforcement (3); a through hole (11) is formed on the node lap plate (1), the front-supported grouting steel pipe (2) passes through the node lap plate (1) through the through hole (11), and the outer wall of the front-supported grouting steel pipe (2) is fully welded and fixed around the hole wall of the through hole (11); the two sides of the node lap plate (1) extend towards the waler respectively, and the plate surface of the node lap plate (1) and the cut-off waler reinforcement (3) are located in the same plane, so that the cut-off part of the waler reinforcement (3) can be fixedly lapped on the node lap plate (1).

2. The connection node structure between the front-supported grouting steel pipe and the waler reinforcement according to claim 1, characterized in that: The through hole (11) has an elliptical structure, which allows the inclined front-supported grouting steel pipe (2) to pass through the through hole (11) at an incline.

3. The connection node structure between the front-supported grouting steel pipe and the waler reinforcement according to claim 1 or 2, characterized in that: The weld leg height at the weld between the wall of the through hole (11) and the front-supported grouting steel pipe (2) is not less than 6mm.

4. The connection node structure between the front-supported grouting steel pipe and the waler reinforcement according to claim 1, characterized in that: The length of the node lap plate (1) is greater than the total width of the cut waler bars (3), so that the cut waler bars (3) are all fixed to the node lap plate (1) by double-sided welding.

5. The connection node structure between the front-supported grouting steel pipe and the waler reinforcement according to claim 4, characterized in that: The lap length of the waler reinforcement (3) and the node lap plate (1) shall not be less than 5 times the diameter of the waler reinforcement (3), and the weld leg height at the welded joint of the waler reinforcement (3) and the node lap plate (1) shall not be less than 6mm.

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