Pile foundation displacement monitoring device based on capacitance change

Abstract

The utility model relates to the technical field of pile foundation monitoring, in particular to a pile foundation displacement monitoring device based on capacitance change, which comprises a support, the support is provided with a vertical rod and at least one transverse supporting arm, the supporting arms are distributed in the circumferential direction of the vertical rod, the outer ends of the supporting arms are provided with monitoring assemblies, and the monitoring assemblies are connected with the vertical rod. The monitoring assembly comprises an inner ring and an outer ring, the inner ring and the outer ring are arranged at an interval, a plurality of metal sheets which are annularly distributed are installed on the outer wall of the inner ring, a plurality of metal sheets which are arranged in one-to-one correspondence with the metal sheets on the inner ring are installed on the inner wall of the outer ring, and capacitive sensors are arranged on the surfaces of the metal sheets of the outer ring. The metal sheets on the inner ring and the outer ring are connected with a power source to form capacitors in a one-to-one correspondence mode, the inner ring is installed on the precast pile, and the outer ring is installed on the supporting arm. The annular monitoring assembly is simple in structure and convenient to install, and multi-direction displacement of the pile foundation can be monitored through changes of capacitance signals.

Description

TECHNICAL FIELD

[0001] The utility model relates to pile foundation monitoring technical field, concretely is a kind of pile foundation displacement monitoring device based on capacitance change. BACKGROUND

[0002] Pile foundation is generally composed of prefabricated pile and pile cap, and can bear static and dynamic load, and is widely used in engineering. Due to the influence of soil conditions, construction errors and other factors, it is necessary to monitor the displacement of pile foundation to ensure the safety and stability of pile foundation.

[0003] At present, the monitoring of pile foundation displacement mainly uses sensors, levels and the like. For example, Chinese invention patent application CN118911214A sets the ranging sensor in a horizontal state through the leveling structure for detection, which can monitor the inclination and settlement of the pile foundation column in real time, discover problems in time and take measures. A ranging plate is arranged below the ranging sensor, which can adjust the position in two-dimensional direction and keep the horizontal state, so that the ranging sensor can detect data more accurately, thereby improving the accuracy of measurement. However, this scheme needs to install sensors in four directions of the pile foundation, which is relatively complex in construction. SUMMARY

[0004] In order to solve the problems of cost and installation convenience of pile foundation displacement monitoring, the utility model provides a kind of pile foundation displacement monitoring device based on capacitance change, simple structure, low cost, convenient for field construction and maintenance, and the technical scheme adopted by the utility model is as follows:

[0005] A kind of pile foundation displacement monitoring device based on capacitance change, including support, the support is equipped with vertical stand and at least one transverse support arm, the support arm is distributed in the circumference of stand, the outer end of support arm is equipped with monitoring assembly, the monitoring assembly includes inner ring and outer ring, the inner ring and outer ring are spaced apart, the outer wall of inner ring is installed with annular distribution several metal sheets, the inner wall of outer ring is installed with the metal sheet corresponding to the metal sheet on the inner ring one by one, the metal sheet surface of outer ring is equipped with capacitance sensor, the metal sheet on the inner ring and outer ring is connected power supply to form capacitance one by one, the inner ring is installed on prefabricated pile, and the outer ring is installed on support arm.

[0006] The above-mentioned pile foundation displacement monitoring device based on capacitance change, the inner ring and outer ring are both plastic materials, and the inner ring and outer ring are respectively connected by two half-circle hoops.

[0007] The above-mentioned pile foundation displacement monitoring device based on capacitance change, the metal sheet is selected from copper sheet.

[0008] The above-mentioned pile foundation displacement monitoring device based on capacitance change, the stand can be vertically telescopic, and the support arm can be transversely telescopic.

[0009] The beneficial effects of this utility model are: the ring-shaped monitoring component has a simple structure and is easy to install; it can monitor the multi-directional displacement of the pile foundation by the change of capacitance signal. Attached Figure Description

[0010] Figure 1 This is a schematic diagram illustrating the usage state of an embodiment of the present utility model;

[0011] Figure 2 This is a top view schematic diagram of a single monitoring component according to an embodiment of the present invention.

[0012] In the diagram: 1 is a precast pile, 2 is a copper sheet, 3 is an inner ring, 4 is an outer ring, and 5 is a support. Detailed Implementation

[0013] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings. The following embodiments are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should be noted that the terminology used is for describing specific embodiments only and is not intended to limit the exemplary embodiments according to this application.

[0014] This embodiment is a pile foundation displacement monitoring device based on capacitance changes, such as... Figure 1 As shown, the system includes a bracket 5, which has a vertical pole and at least one horizontal support arm. A monitoring component is located at the outer end of each support arm. The support arms are distributed circumferentially around the pole. The pole is vertically extendable, and the support arms are horizontally extendable. This allows for easy adjustment of the monitoring component's position even after the lower end of the pole is buried in the ground, ensuring data accuracy. The telescopic structure of the pole and support arms can use a conventional manually adjustable telescopic rod.

[0015] Combination Figure 2 The monitoring component includes an inner ring 3 and an outer ring 4, which are spaced apart. The outer wall of the inner ring 3 is fitted with a plurality of metal plates arranged in a ring. The inner wall of the outer ring 4 is fitted with a plurality of metal plates arranged in a one-to-one correspondence with the metal plates on the inner ring 3. Capacitive sensors are provided on the surface of each metal plate on the outer ring 4. The metal plates on both the inner ring 3 and the outer ring 4 are connected to a power source to form capacitors in a one-to-one correspondence. All metal plates are made of copper.

[0016] Both the inner ring 3 and the outer ring 4 are made of high-strength, corrosion-resistant plastic, capable of withstanding long-term outdoor operation. The inner ring 3 and outer ring 4 are each formed by two semi-circular clamps connected together, facilitating installation. The inner ring 3 is installed on the precast pile 1, and the outer ring 4 is installed on the support arm.

[0017] When the precast pile 1 produces displacement changes in the axial direction, radial direction and the like, the copper sheet spacing or matching area between the inner ring 3 and the outer ring 4 will change, thereby forming a capacitance change. The capacitance sensor on the outer ring 4 transmits the capacitance value to the monitoring terminal for processing, facilitating the staff to obtain the monitoring conclusion. The electrical connection, electrical control, monitoring terminal and the like of the device all use commercially available products and conventional technical methods.

[0018] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several changes or improvements can be made without departing from the principles of the present application, and these changes or improvements should also be considered as the protection scope of the present application.

Claims

1. A pile foundation displacement monitoring device based on capacitance change, comprising a support (5), characterized in that: The bracket (5) is provided with a vertical pole and at least one horizontal support arm. The support arm is distributed around the pole. The outer end of the support arm is provided with a monitoring component. The monitoring component includes an inner ring (3) and an outer ring (4). The inner ring (3) and the outer ring (4) are spaced apart. The outer wall of the inner ring (3) is equipped with several metal plates arranged in a ring. The inner wall of the outer ring (4) is equipped with several metal plates arranged in a one-to-one correspondence with the metal plates on the inner ring (3). The surface of the metal plates on the outer ring (4) is provided with a capacitive sensor. The metal plates on the inner ring (3) and the outer ring (4) are connected to a power source to form a capacitor in a one-to-one correspondence. The inner ring (3) is installed on the precast pile (1), and the outer ring (4) is installed on the support arm.

2. The pile foundation displacement monitoring device based on capacitance change according to claim 1, characterized in that: Both the inner ring (3) and the outer ring (4) are made of plastic. The inner ring (3) and the outer ring (4) are each made of two semi-circular clamps connected together.

3. The pile foundation displacement monitoring device based on capacitance change according to claim 1, characterized in that: The metal sheet is made of copper (2).

4. The pile foundation displacement monitoring device based on capacitance change according to claim 1, characterized in that: The upright pole can extend and retract vertically, and the support arm can extend and retract horizontally.

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