Building foundation pit steel support axial force measuring device
By introducing a pad and an axial force gauge fixing frame into the steel support axial force monitoring device, the problems of difficult coaxial installation and the influence of eccentric loads are solved, and rapid and accurate axial force measurement is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG BAIYUN CONSTR GRP CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-05-19
AI Technical Summary
Existing steel support axial force monitoring devices suffer from problems such as difficulty in coaxial installation, eccentric loads affecting measurement accuracy, and cumbersome bolt operation.
The design includes an axial force gauge, a bracket, a pad, and an axial force gauge mounting bracket. The pad enables quick coaxial installation, and the pad and reinforcing ribs improve stability. The axial force gauge mounting bracket enables quick fixing and loosening.
It enables rapid coaxial installation of the axial force gauge and steel support, reduces insufficient machining accuracy and deformation interference, and improves measurement accuracy and operational efficiency.
Smart Images
Figure CN224262686U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of axial force measurement technology, specifically a device for measuring the axial force of steel supports for building foundation pits. Background Technology
[0002] Foundation pit support is a dynamic and temporary system, and its stress state constantly changes with factors such as excavation depth, weather, and construction activities. Therefore, safety monitoring of the foundation pit support structure is necessary. Among these, axial force is the pressure directly borne by the steel support from the foundation pit soil and the external environment. Monitoring the axial force of the steel support is a critical monitoring item that must be carried out in foundation pit engineering and is an important technical measure to ensure the safety and smooth progress of the project.
[0003] Existing axial force monitoring devices for steel supports involve installing an axial force gauge at the fixed end of the steel support, with the gauge housed within a cylindrical bracket. The outer periphery of the cylindrical bracket has fins, which are welded to the bottom of the bracket to the end face of the steel support. The existing axial force gauges have the following problems: 1. For accurate measurement, the axial force gauge and steel support must be installed coaxially. However, many operators, for convenience and time-saving, only roughly visually estimate the coaxial position, easily leading to significant installation deviations. 2. Furthermore, if the fixed end of the steel support has insufficient machining precision, damage, or deformation, it can cause uneven stress, resulting in eccentric loads and severely affecting the accuracy of the measurement results. 3. During the transportation and hoisting of the steel support, the axial force gauge, located inside the cylindrical bracket, is fixed by four bolts passing through the side wall of the bracket. After installation, these bolts need to be loosened; due to the large diameter of the steel support and the presence of fins in the cylindrical bracket, both the initial installation and subsequent loosening of the bolts are cumbersome. Utility Model Content
[0004] To address the shortcomings of the existing technology, this utility model provides a device for measuring the axial force of steel supports in building foundation pits. It enables rapid coaxial installation and greatly reduces interference from insufficient machining accuracy or damage and deformation of the fixed end of the steel support. Furthermore, it also enables rapid fixing and loosening of the axial force gauge.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A device for measuring the axial force of a steel support for a building foundation pit includes an axial force gauge and a support. The support includes a cylinder with openings at both ends. The axial force gauge is located inside the support. An opening groove is provided at the front end of the support to avoid the wiring terminals of the axial force gauge. It also includes a pad with at least two fixed feet. The rear end of the support is fixed to the center of the pad. Each fixed foot of the pad is provided with a through hole II corresponding to a through hole I on the end of the steel support.
[0007] Furthermore, it also includes an axial force gauge mounting bracket, on which a threaded through hole is provided. The axial force gauge mounting bracket is L-shaped, with a through hole corresponding to the threaded through hole at its rear end. The axial force gauge mounting bracket is fixed to the bracket by fastening bolts, and the front end of the axial force gauge mounting bracket presses against the top of the axial force gauge.
[0008] Furthermore, each fixing foot of the pad is provided with a plurality of through holes II radially at its end.
[0009] Furthermore, an annular reinforcing plate is provided between the fixing feet of the pad.
[0010] Furthermore, reinforcing ribs are provided between the pad and the bracket.
[0011] Furthermore, the pad is a steel plate with a thickness of 1.5CM-3.5CM.
[0012] The beneficial effects of this utility model are:
[0013] It achieves rapid coaxial installation of the axial force gauge and steel support through the design of a pad. The addition of a flat pad significantly reduces interference from insufficient machining precision at the steel support fixing end, which could cause stress on the axial force gauge. Furthermore, the use of a thicker steel plate for the pad reduces interference from damage or deformation of the contact surface. The design of the axial force gauge mounting bracket enables rapid fixing and loosening of the axial force gauge. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;
[0015] Figure 2 This is a schematic diagram of the overall structure of the second embodiment of the present invention;
[0016] Figure 3 This is a schematic diagram of the installation state of the first embodiment of this utility model;
[0017] Figure 4 This is a schematic diagram of the bracket and base plate structure of the second embodiment of this utility model;
[0018] In the figure, axial force gauge 1, axial force gauge terminal 101, bracket 2, opening slot 201, threaded through hole 202, pad 3, fixing foot 301, through hole II 3011, annular reinforcing plate 302, axial force gauge fixing frame 4, through hole I 401, steel support 5, through hole 501, and reinforcing rib 6. Detailed Implementation
[0019] To enable those skilled in the art to better understand the present invention, the following will describe the embodiments of the present invention in conjunction with the appended descriptions. Figure 1-4The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0020] First embodiment:
[0021] This utility model's axial force measuring device for steel supports in building foundation pits includes an axial force gauge 1, a support 2, a pad 3, and an axial force gauge mounting bracket 4. The support 2 comprises a cylinder open at both ends. The axial force gauge 1 is located inside the support 2. An opening groove 201 is provided at the front end of the support 2 to avoid the axial force gauge's wiring terminal 101. The pad 3 is provided with at least two fixing feet 301, such as... Figure 1 As shown, four fixing feet 301 are provided. Those skilled in the art can provide two or three fixing feet as needed. The rear end of the bracket 2 is welded and fixed to the center of the pad 3. Each fixing foot 301 of the pad 3 has a through hole II 3011 at its end, corresponding to the through hole I 401 on the end of the steel support 5. The pad 3 is a steel plate with a thickness of approximately 1.5 cm to 3.5 cm; preferably, a 3 cm thick steel plate is used. The center of the pad 3 is preferably a circular plate with a diameter larger than that of the bracket 2; however, a square plate can also be used.
[0022] The axial force gauge mounting bracket 5 includes an arc-shaped plate that fits against the arc-shaped outer wall of the support 2. A horizontally extending pressure plate is provided at the top of the arc-shaped plate. The axial force gauge mounting bracket 5 is L-shaped in general. Preferably, one axial force gauge mounting bracket 5 is provided, but two can also be provided. A threaded through hole 202 is provided on the support 2, and a through hole 501 corresponding to the threaded through hole 202 is provided at the rear end of the axial force gauge mounting bracket 5. The axial force gauge mounting bracket 5 is fixed to the support 2 by fastening bolts, and the front end of the axial force gauge mounting bracket 5 presses against the top of the axial force gauge 1. After being fixed by the fastening bolts, the front end of the fastening bolts presses against the axial force gauge 1, preventing radial wobbling within the support 2. The front end of the axial force gauge mounting bracket 5 pressing against the top of the axial force gauge 1 prevents axial movement of the axial force gauge 1, achieving a good fixing effect and making installation and disassembly of the axial force gauge mounting bracket 5 convenient.
[0023] To accommodate steel supports 4 of different diameters, each fixing foot 301 of the pad 3 is provided with multiple through holes II 3011 radially at its end. For example... Figure 1 As shown, each fixed foot 301 has two through holes Ⅱ3011 radially provided at its end, which can accommodate steel supports of two different diameters.
[0024] During use, the steel support may experience force misalignment due to various factors. When this misalignment occurs, the connection between the bracket 2 and the steel support experiences greater stress, and the contact area between them is small, potentially leading to bending. To improve the stability of the bracket 2 and prevent misalignment during stress, this invention welds a reinforcing rib 6 between the pad 3 and the bracket 2. The reinforcing rib 6 is preferably a triangular steel plate.
[0025] Second embodiment:
[0026] like Figure 2 As shown, in order to improve the compressive deformation resistance of the pad 3, an annular reinforcing plate 302 is provided between the fixing feet of the pad 3 in this embodiment.
[0027] During installation, the fixing foot 301 and the steel support 5 are connected by bolts. The mounting holes of the fixing foot 301 and the steel support 5 can be selected according to the location that is convenient for operation. Then, the axial force gauge 1 is placed into the bracket 2, and then the axial force gauge fixing bracket 5 is installed. After the steel support 5 is placed in the predetermined position, the axial force gauge fixing bracket 5 is removed, and then the steel support is tightened by the hydraulic cylinder at the movable end of the steel support 5.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
Claims
1. A device for measuring the axial force of a steel support for a building foundation pit, comprising an axial force gauge and a support, wherein the support includes a cylinder open at both ends, the axial force gauge is located inside the support, and an opening groove is provided at the front end of the support to avoid the wiring terminals of the axial force gauge; characterized in that: It also includes a pad with at least two fixed feet, the rear end of the bracket is fixed to the center of the pad, and each fixed foot of the pad is provided with a through hole II corresponding to the through hole I on the end of the steel support.
2. The axial force measuring device for steel supports in building foundation pits as described in claim 1, characterized in that: It also includes an axial force gauge mounting bracket, on which a threaded through hole is provided. The axial force gauge mounting bracket is L-shaped, with a through hole corresponding to the threaded through hole at its rear end. The axial force gauge mounting bracket is fixed to the bracket by fastening bolts, and the front end of the axial force gauge mounting bracket presses against the top of the axial force gauge.
3. The axial force measuring device for steel supports in building foundation pits as described in claim 1, characterized in that: The pad has multiple through holes II radially provided at the end of each fixed foot.
4. The axial force measuring device for steel support in a building foundation pit as described in claim 1, characterized in that: An annular reinforcing plate is provided between the fixing feet of the pad.
5. The axial force measuring device for steel supports in building foundation pits as described in claim 1, characterized in that: A reinforcing rib is provided between the pad and the bracket.
6. The axial force measuring device for steel support in a building foundation pit as described in claim 1, characterized in that: The pad is made of steel plate with a thickness of 1.5CM-3.5CM.