Foundation pit inclination deformation monitoring device
By arranging steel bars and fixing rings to form a cage-like structure inside the foundation pit, combined with inclinometer tubes and sensors, the shortcomings of deformation monitoring inside the foundation pit are solved, enabling real-time monitoring of the foundation pit and ensuring the safety and stability of the project.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG ZHICHENG GEOGRAPHIC INFORMATION TECH CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-04-17
AI Technical Summary
Existing technologies make it difficult to comprehensively and in real-time monitor the deformation of the internal structure of the foundation pit, leading to potential construction safety hazards.
Design a foundation pit tilt deformation monitoring device, which uses steel bars and fixing rings to form a cage structure, combined with inclinometer tubes and sensors to monitor the displacement and tilt changes inside the foundation pit in real time, and uses stress gauges to sense stress fluctuations caused by load and temperature to provide key data support.
It enables real-time monitoring of the internal structure of the foundation pit, ensuring project safety, providing data support for structural safety assessment and construction monitoring, and guaranteeing the stability and durability of the project.
Smart Images
Figure CN224133815U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of testing technology for foundations or foundation structures in underground structures, and particularly relates to a device for monitoring the tilting deformation of foundation pits. Background Technology
[0002] As a crucial component of building construction, the safety of foundation pit engineering directly impacts the overall quality and safety of the project. Because foundation pit construction involves extensive earthwork excavation and the design and construction of support structures, monitoring the stability and deformation of the foundation pit is paramount. Deformation issues in foundation pits often manifest as tilting and displacement. Failure to detect and effectively control these deformations in a timely manner can lead to serious construction safety accidents and even threaten the safety of the surrounding environment and buildings.
[0003] Currently, leveling instruments and surface deformation monitoring have become common monitoring solutions. However, these solutions typically only monitor the surface around the foundation pit and lack comprehensive, real-time monitoring capabilities for the deformation of the internal structure of the pit. Utility Model Content
[0004] In order to solve the above problems, this application provides a foundation pit tilting deformation monitoring device.
[0005] The purpose of this application is to provide a foundation pit tilt deformation monitoring device, which is placed inside the foundation pit to monitor the foundation pit more deeply.
[0006] To achieve the purpose of this application, the technical solution of this application is as follows:
[0007] The foundation pit tilt deformation monitoring device includes multiple steel bars evenly distributed around the same central axis. The steel bars include at least two stress gauge steel bars and at least two lightning protection steel bars. Fixing rings are provided on the inner or outer circumference of the steel bars. Inclinometer tubes are installed on the steel bars. Stress gauges are installed on the stress gauge steel bars. The stress gauges are connected to stress gauge receivers through wires. Lightning protection wires are installed on the lightning protection steel bars. Inclinometer sensors are installed inside the inclinometer tubes. The inclinometer sensors are connected to a digital reading instrument that can display tilt data through wires.
[0008] Furthermore, the front end of the reinforcing bar is provided with a bent bar.
[0009] Furthermore, the fixing ring includes an outer fixing ring and an inner fixing ring, with the inner fixing ring arranged inside the reinforcing bar and the outer fixing ring arranged outside the reinforcing bar.
[0010] Furthermore, at least three inner fixing rings are provided, with the inner fixing rings located in the middle and lower sections of the reinforcing bars.
[0011] Furthermore, the outer fixing rings are spaced apart in the middle and lower sections of the reinforcing bars.
[0012] Furthermore, the cross-sectional diameter of the inner fixing ring is larger than that of the outer fixing ring, and the spacing between the inner fixing rings is larger than that between the outer fixing rings.
[0013] Furthermore, at least two reinforcing bar members are provided on the inner circumference of the reinforcing bar. The reinforcing bar members are arranged parallel to the reinforcing bar. One end of the reinforcing bar member is fixedly connected to an inner fixing ring, and the other end of the reinforcing bar member is fixedly connected to another inner fixing ring.
[0014] Furthermore, a sleeve is provided on the reinforcing bar, and the reinforcing bar component is inserted into the sleeve.
[0015] Furthermore, an insulating protective layer is provided on the outer periphery of the stress gauge.
[0016] Furthermore, both the upper and lower ends of the inclinometer tube are equipped with sealing caps, through which the wires connecting the inclinometer sensor pass.
[0017] Compared with the prior art, the beneficial effects of this application are as follows:
[0018] 1. This application uses steel bars and fixing rings to form a cage-like structure. The cage-like structure can be placed in the foundation pit. After the inclinometer tube is matched with the cage-like structure, it is pre-embedded in the foundation pit. Together with the inclinometer sensor and digital reading instrument, it monitors the displacement and tilt inside the structure, and monitors the displacement and tilt changes of the soil or structure in real time during the stress or deformation process. This provides key data for stability analysis and risk warning in the engineering design, construction and operation stages, and ensures the safety of the project.
[0019] 2. The steel reinforcement of the stress gauge in this application, together with the stress gauge and the stress gauge receiver, is pre-embedded in the foundation pit to sense stress fluctuations caused by factors such as load and temperature in real time. This helps monitoring personnel to grasp the stress state of the steel reinforcement in real time, and provides data support for structural safety assessment, construction monitoring and defect analysis of bridges, buildings and other projects, ensuring the stability and durability of the project.
[0020] 3. The steel bars, inner fixing rings, outer fixing rings, and steel bar components of this application work together to form a relatively stable cage structure, ensuring that the cage structure can be stably embedded in the foundation pit, and can be used in conjunction with stress gauges, inclinometers and other equipment to monitor displacement, tilt and stress data inside the structure. Attached Figure Description
[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.
[0022] Figure 1 This is a schematic diagram of the overall structure of this application;
[0023] Figure 2This is a schematic diagram of the front view structure of this application;
[0024] Figure 3 This is a bottom view structural diagram of this application.
[0025] In the picture:
[0026] 1. Reinforcing steel for stress gauges; 2. Bending reinforcement; 3. Inclinometer tube; 4. Outer fixing ring; 5. Reinforcing steel components; 6. Inner fixing ring; 7. Reinforcing steel for lightning protection wires; 8. Sealing cap. Detailed Implementation
[0027] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0029] In this application, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this application and do not specifically refer to any part or element in this application. They should not be construed as limiting this application.
[0030] Example 1
[0031] This embodiment is a foundation pit tilt deformation monitoring device, which is arranged in a pre-excavated cylindrical foundation pit. The basic component of the device in this embodiment is a cylindrical cage structure, which includes multiple reinforcing bars evenly distributed around the same central axis. For example, in this embodiment, the number of reinforcing bars is 8. If the number of reinforcing bars is small, the entire cage structure will be very unstable; if the number of reinforcing bars is large, the entire cage structure will be too stable. Therefore, the cage structure in this embodiment is optimally relatively stable. Fixing rings are installed on the inner or outer circumference of the reinforcing bars. The fixing rings include outer fixing rings 4 and inner fixing rings 6. The inner fixing rings 6 are arranged on the inner side of the reinforcing bars, and the outer fixing rings 4 are arranged on the outer side of the reinforcing bars. In terms of quantity, there are at least three inner fixing rings 6. The inner fixing rings 6 are arranged in the middle and lower sections of the reinforcing bars, and the inner fixing rings 6 are installed slightly above the middle section, slightly above the lower section, and slightly below the lower section of the reinforcing bars, and are connected by welding. The inner fixing ring 6 is welded to the reinforcing bar, and the outer fixing ring 4 is arranged at intervals in the middle and lower sections of the reinforcing bar. The outer fixing ring 4 is also welded to the reinforcing bar. The cross-sectional diameter of the inner fixing ring 6 is larger than that of the outer fixing ring 4, and the interval between the inner fixing rings 6 is larger than that between the outer fixing rings 4. In this embodiment, the inner fixing ring 6 serves as a support ring for the reinforcing bar, and the outer fixing ring 4 serves as a restraining ring for the reinforcing bar. Under the combined action of the inner fixing ring 6 and the outer fixing ring 4, a relatively stable cage structure is formed, ensuring that the cage structure can be relatively stably embedded in the foundation pit. In addition, the front end of the reinforcing bar has a bent bar 2. Specifically, the reinforcing bar is bent to form the bent bar 2 by a bending machine. The angle between the bent bar 2 and the main body of the reinforcing bar is 30°-50°, ensuring that the cage structure of this embodiment can be smoothly placed into the foundation pit.
[0032] The eight reinforcing bars include at least two stress gauge reinforcing bars 1 and at least two lightning protection reinforcing bars. Inclinometer tubes 3 are installed on the reinforcing bars and are fixed to the reinforcing bars by cable ties and fixing rings. Sealing caps 8 are installed at both the upper and lower ends of the inclinometer tubes 3. The wires connecting the inclinometer sensors pass through the sealing caps 8 to prevent water from entering the inclinometer tubes 3. Stress gauges are mounted on the stress gauge reinforcing bars 1 and are fixed to the reinforcing bars by cable ties. An insulating protective layer is arranged around the outer periphery of the stress gauges. The stress gauges are connected to a stress gauge receiver via wires, and the stress gauge receiver is placed outside the cage-like structure. The device is placed on the ground and protected by lightning protection wires installed on the lightning protection steel bars. An inclinometer is installed inside the inclinometer tube 3. The inclinometer is connected to a digital reading instrument that can display tilt data through wires. The function of the inclinometer is to sense the tilt in real time. It captures the angular deviation of the object relative to a reference plane such as a plumb line or a horizontal plane through internal sensitive elements such as accelerometers and gyroscopes. It is suitable for millimeter-level deformation monitoring and converts the physical tilt into an electrical signal, which is transmitted to the digital reading instrument through wired or wireless means such as RS485, USB, Bluetooth, or 4G.
[0033] In this embodiment, the inclinometer tube 3, after being combined with the cage structure, is pre-embedded in the foundation pit. Together with the inclinometer sensor and digital reading instrument, it monitors the horizontal displacement inside the structure, and monitors the displacement and tilt changes of the soil or structure in real time during the stress or deformation process. This provides key data for stability analysis and risk warning in the engineering design, construction and operation stages, ensuring engineering safety.
[0034] In this embodiment, the reinforcing steel bar 1, along with the stress meter and its receiver, is pre-embedded in the foundation pit to sense stress fluctuations caused by factors such as load and temperature in real time. This assists monitoring personnel in understanding the stress state of the reinforcing steel bar in real time, providing data support for structural safety assessment, construction monitoring, and defect analysis of bridges, buildings, and other engineering projects, ensuring the stability and durability of the project. The stress meter receiver amplifies and filters the stress signal, converting it into a digital signal or displaying it intuitively. It can store and analyze stress change trends, and the stress meter and other equipment can also be insulated and protected.
[0035] This embodiment uses steel reinforcement in the lightning protection wire to divert lightning current to the ground, protecting the transmission line from lightning strikes. It diverts lightning current, reduces induced overvoltage on the conductor, decreases the probability of lightning strikes, and ensures the safe and stable operation of the power line; this is the core protection structure of this embodiment.
[0036] More specifically, at least two reinforcing bar members 5 are installed on the inner circumference of the reinforcing bar. The reinforcing bar member 5 is a thicker metal round bar. The reinforcing bar member 5 is arranged parallel to the reinforcing bar. One end of the reinforcing bar member 5 is fixedly connected to an inner fixing ring 6, and the other end of the reinforcing bar member 5 is fixedly connected to another inner fixing ring 6. A sleeve is welded on the reinforcing bar, and the reinforcing bar member 5 is inserted into the sleeve to enhance the stress stability of the lower end of the cage structure.
[0037] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0038] While the specific embodiments of this application have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this application. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this application are still within the scope of protection of this application.
Claims
1. A foundation pit tilting deformation monitoring device, characterized in that: It includes multiple reinforcing bars evenly distributed around the same central axis, the reinforcing bars including at least two stress gauge reinforcing bars and at least two lightning protection reinforcing bars; A fixing ring is provided on the inner or outer circumference of the reinforcing bar, and an inclinometer tube is provided on the reinforcing bar; A stress gauge is installed on the reinforcing steel bar for stress measurement, and the stress gauge is connected to a stress gauge receiver via a wire. A lightning protection wire is installed on the reinforcing steel bar for lightning protection. An inclinometer sensor is installed inside the inclinometer tube, and the inclinometer sensor is connected to a digital reading instrument that can display inclinometer data via a wire.
2. The foundation pit tilt deformation monitoring device as described in claim 1, characterized in that: The front end of the reinforcing bar is provided with a bent bar.
3. The foundation pit tilt deformation monitoring device as described in claim 1, characterized in that: The fixing ring includes an outer fixing ring and an inner fixing ring. The inner fixing ring is arranged on the inner side of the reinforcing bar, and the outer fixing ring is arranged on the outer side of the reinforcing bar.
4. The foundation pit tilt deformation monitoring device as described in claim 3, characterized in that: The inner fixing ring has at least three rings, and the inner fixing ring is set in the middle and lower sections of the reinforcing bar.
5. The foundation pit tilt deformation monitoring device as described in claim 3, characterized in that: The outer fixing rings are spaced apart at the middle and lower sections of the reinforcing bars.
6. The foundation pit tilt deformation monitoring device as described in claim 3, characterized in that: The cross-sectional diameter of the inner fixing ring is larger than that of the outer fixing ring, and the spacing between the inner fixing rings is larger than that between the outer fixing rings.
7. The foundation pit tilt deformation monitoring device as described in claim 4, characterized in that: At least two steel reinforcement members are provided on the inner circumference of the steel bar. The steel reinforcement members are arranged in parallel with the steel bar. One end of the steel reinforcement member is fixedly connected to an inner fixing ring, and the other end of the steel reinforcement member is fixedly connected to another inner fixing ring.
8. The foundation pit tilt deformation monitoring device as described in claim 7, characterized in that: A sleeve is provided on the reinforcing bar, and the reinforcing bar component is inserted into the sleeve.
9. The foundation pit tilt deformation monitoring device as described in claim 1, characterized in that: An insulating protective layer is provided on the outer periphery of the stress gauge.
10. The foundation pit tilt deformation monitoring device as described in claim 1, characterized in that: Both the upper and lower ends of the inclinometer tube are equipped with sealing caps, and the wires connecting the inclinometer sensor pass through the sealing caps.