Foundation settlement monitoring device, installation method and foundation settlement monitoring method

Abstract

The invention provides a foundation settlement monitoring device, an installation method and a foundation settlement monitoring method, and belongs to the technical field of civil engineering. The foundation settlement monitoring device comprises a guide pipe, a plurality of settlement rings and a position sensing unit. The installation method of the foundation settlement monitoring device comprises the following steps that A, an installation hole is longitudinally formed in a monitoring position; b, sinking the guide pipe; c, mounting the settlement rings one by one from bottom to top; the foundation settlement monitoring method comprises the following steps that D, the position sensing unit is lowered into the guide pipe, and then water is slowly injected into the guide pipe; e, the pressure value of the position sensing unit is monitored, the water injection amount is recorded in real time, and the initial position information of each settlement ring is obtained; and F, re-monitoring in the same way as the step E to obtain the latest position information of each settlement ring, and judging the settlement condition of each settlement ring by comparing the position change of each settlement ring. The device has the advantages of simple structure, convenience in operation, high precision and the like.

Description

Technical Field

[0001] This invention belongs to the field of civil engineering technology and relates to a foundation settlement monitoring device, installation method, and foundation settlement monitoring method. Background Technology

[0002] Foundation settlement monitoring is an important means of monitoring foundation safety. Generally, a settlement ring that can sink with the soil is installed outside the settlement guide pipe by pre-burying it. Then, the position information of the settlement ring is obtained by magnetic induction. This method has disadvantages such as large amount of burying work and no maintenance.

[0003] The existing monitoring method is magnetic induction, which involves lowering a magnetic sensor. When the sensor contacts a settling ring with a built-in permanent magnet, the position of the settling ring is determined based on the lowering depth. This method has the following drawbacks: 1. The settling ring itself easily attracts magnetic metals from the soil, preventing it from settling smoothly outside the settling guide tube and reducing monitoring accuracy; 2. The soil outside the settling guide tube may contain magnetic substances that can mislead the magnetic sensor. This is because the magnetism of the settling ring itself attracts a certain amount of magnetic metals, which adhere to the ring's perimeter. After being magnetized, these metals act as magnetic elements and can interact with the magnetic sensor, thus affecting monitoring accuracy. Summary of the Invention

[0004] The first objective of this invention is to address the aforementioned problems in existing technologies by providing a foundation settlement monitoring device. The technical problem to be solved by this invention is how to reduce the difficulty and workload of installation.

[0005] The objective of this invention can be achieved through the following technical solution: A foundation settlement monitoring device, characterized in that the foundation settlement monitoring device includes a conduit, several settlement rings, and a position sensing unit. The settlement ring includes a circular body, a groove formed in the middle of the outer surface of the body, and several sinking plates evenly arranged circumferentially within the groove. The sinking plates are arc-shaped and adapted to the groove. One end of the sinking plate is hinged to the body. Several iron blocks are evenly arranged circumferentially within the body. The position sensing unit includes a float, a positioning cone located below the float, and a mesh guide ring fixed to the outside of the float. A permanent magnet is provided at the outer edge of the guide ring, and a pressure sensor is provided inside the positioning cone. The guide ring is adapted to the inner cavity of the conduit, and the body is slidably connected to the outside of the conduit.

[0006] Furthermore, the end of the sinker away from the hinge point has an enlarged portion; when the sinker is located in the slot, the enlarged portion is partially located outside the slot.

[0007] Furthermore, the bottom of the catheter has a tapered insertion portion.

[0008] As another objective of this invention, a method for installing a foundation settlement monitoring device is provided, characterized by the following steps: A. A longitudinal installation hole is opened at the monitoring location, the diameter of which is larger than the outer contour of the settlement ring after the sinking piece is inserted into the slot; B. The guide tube is lowered; C. Settlement rings are installed one by one from bottom to top: the sinking piece of the settlement ring to be installed is inserted into the slot, the main body is sleeved on the outside of the guide tube, and after being lowered to the designated position, a drive rod is inserted into the guide tube. The lower end of the drive rod has a drive head, and the drive head has magnetic blocks that correspond one-to-one with the iron blocks on the main body. The drive rod is rotated until the sinking piece expands outward. After each settlement ring is installed, soil is filled in so that the outside of the guide tube between adjacent settlement rings is filled with soil.

[0009] Furthermore, in step C, when installing the bottommost settlement ring, soil is first filled into the installation hole outside the guide tube to support the settlement ring.

[0010] As a third objective of the present invention, a method for monitoring foundation settlement is provided, characterized by comprising the following steps: D. Lowering a position sensing unit into a conduit and then slowly injecting water into the conduit; E. Monitoring the pressure value of the position sensing unit and recording the amount of water injected in real time to obtain the initial position information of each settlement ring; F. Performing monitoring again in the same manner as step E to obtain the latest position information of each settlement ring, and judging the settlement status of each settlement ring by comparing the position changes of each settlement ring.

[0011] This solution reduces construction difficulty, allows for the installation of settlement monitoring devices after foundation construction is completed, and features a simple and highly accurate monitoring method. It also minimizes external interference and facilitates monitoring operations. Attached Figure Description

[0012] Figure 1 This is a schematic diagram showing the engagement state of the drive rod and the settling ring.

[0013] Figure 2 This is a schematic diagram of the assembly structure of the settling ring and the guide tube in the contracted state.

[0014] Figure 3 This is a schematic diagram of the assembly structure of the rain duct when the settling ring is open.

[0015] Figure 4 yes Figure 1 Cross-sectional view along the AA direction.

[0016] Figure 5 This is a schematic diagram of the structure with the settling ring in the open state.

[0017] Figure 6 This is a schematic diagram of the position sensing unit inside the duct.

[0018] In the figure, 1 is the guide tube; 11 is the insertion part; 2 is the settling ring; 21 is the body; 22 is the slot; 23 is the sinker piece; 24 is the iron block; 25 is the enlargement part; 31 is the float; 32 is the positioning cone; 33 is the guide ring; 34 is the permanent magnet; 41 is the drive rod; 42 is the drive head; and 43 is the magnetic block. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 2 , Figure 3 , Figure 5 and Figure 6 The foundation settlement monitoring device includes a conduit 1, several settlement rings 2, and a position sensing unit. The settlement ring 2 includes a circular body 21, a groove 22 opened in the middle of the outer side of the body 21, and several sinking plates 23 evenly arranged in the groove 22. The sinking plates 23 are arc-shaped and adapted to the groove 22. One end of the sinking plate 23 is hinged to the body 21. Several iron blocks 24 are evenly arranged in the inner circumference of the body 21. The position sensing unit includes a float 31, a positioning cone 32 located below the float 31, and a mesh guide ring 33 fixed to the outside of the float 31. The outer edge of the guide ring 33 has a permanent magnet 4334. A pressure sensor is installed in the positioning cone 32. The guide ring 33 is adapted to the inner cavity of the conduit 1, and the body 21 is slidably connected to the outside of the conduit 1.

[0021] The end of the follower 23 away from the hinge point has an enlarged portion 25; when the follower 23 is located inside the slot 22, the enlarged portion 25 is partially outside the slot 22. The bottom of the conduit 1 has a tapered insertion portion 11.

[0022] The function of the enlarged part 25 is that when the settling ring 2 is driven to reverse, the resistance between the enlarged part 25 and the soil will cause the settling piece 23 to swing around the hinge point, thereby opening up; while when the settling ring 2 is driven to rotate forward or not rotate, it is in a contracted state.

[0023] For example, 1. Figure 3 and Figure 4The installation method of the foundation settlement monitoring device includes the following steps: A. Open a longitudinal installation hole at the monitoring position. The diameter of the installation hole is slightly larger than the outer contour of the settlement ring 2 after the sinking piece 23 is inserted into the slot 22; B. Lower the guide tube 1. When lowering the guide tube 1, ensure that there is enough space outside the guide tube 1 to allow the settlement ring 2 to be installed; C. Install the settlement rings 2 one by one from bottom to top: the sinking piece 23 of the settlement ring 2 to be installed is inserted into the slot 22, the body 21 is fitted over the guide tube 1, and after lowering to the designated position, a drive rod 41 is inserted into the guide tube 1. The lower end of the drive rod 41 has a... There is a drive head 42, and the drive head 42 has a magnetic block 43 that corresponds one-to-one with the iron block 24 on the body 21. The magnetic block 43 can be a permanent magnet or an electromagnetic one. In order to make the magnetic force controllable and to ensure that the settling ring 2 is opened, the electromagnetic component is more reliable. The drive rod 41 is rotated until the settling piece 23 is opened outward. After each settling ring 2 is installed, soil is filled so that the outside of the guide tube 1 between adjacent settling rings 2 is filled with soil. When filling the soil, a ramming pipe can be used to compact the soil by sleeved on the guide tube 1, so that the settling piece 23 in the opened state is embedded between the soil.

[0024] In step C, when installing the bottommost settlement ring 2, soil is first filled into the installation hole outside the guide tube 1 to support the settlement ring 2.

[0025] The foundation settlement monitoring method includes the following steps: D. Lowering the position sensing unit into the conduit 1, and then slowly injecting water into the conduit 1; E. Monitoring the pressure value of the position sensing unit and recording the water injection volume in real time to obtain the initial position information of each settlement ring 2; F. Performing monitoring again in the same manner as step E to obtain the latest position information of each settlement ring 2, and judging the settlement status of each settlement ring 2 by comparing the position changes of each settlement ring 2.

[0026] As is well known, the volume of the inner cavity of the conduit 1 is fixed. The liquid level in the conduit 1 can be calculated based on the amount of water injected. If the pressure value obtained by the pressure sensor in the position sensing unit suddenly increases at a certain liquid level, it indicates that the position sensing unit is located inside the settling ring 2. This is because the iron material of the settling ring 2 will exert an interaction force on the permanent magnet 4334 outside the guide ring 33, thus preventing the float 31 from rising with the liquid level. At this time, the pressure sensor is located at a deeper position below the liquid surface. As the liquid level continues to rise, the position sensing unit breaks free from the restraint of the settling ring 2 and returns to the liquid surface position. This process is repeated, and the position of all the settling rings 2 can be detected through one position sensing unit.

[0027] This solution reduces construction difficulty, and settlement monitoring devices can be installed after the foundation construction is completed. The monitoring method is simple and highly accurate.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A foundation settlement monitoring device, characterized in that, The foundation settlement monitoring device includes a guide tube (1), several settlement rings (2), and a position sensing unit. The settlement ring (2) includes a circular body (21), a slot (22) opened in the middle of the outer side of the body (21), and several sinking plates (23) evenly arranged in the slot (22) in the circumferential direction. The sinking plates (23) are arc-shaped and adapted to the slot (22). One end of the sinking plate (23) is hinged to the body (21). The inner circumferential direction of the body (21) is... The position sensing unit includes a float (31), a positioning cone (32) located below the float (31), and a mesh guide ring (33) fixed on the outside of the float (31). The guide ring (33) has permanent magnet blocks (43)(34) at its outer edge. A pressure sensor is provided inside the positioning cone (32). The guide ring (33) is adapted to the inner cavity of the conduit (1), and the body (21) is slidably connected to the outside of the conduit (1).

2. The foundation settlement monitoring device according to claim 1, characterized in that, The sinker (23) has an enlarged portion (25) at one end away from the hinge point; when the sinker (23) is located in the slot (22), the enlarged portion (25) is partially located outside the slot (22).

3. The foundation settlement monitoring device according to claim 2, characterized in that, The bottom of the catheter (1) has a tapered insertion part (11).

4. A method for installing the foundation settlement monitoring device as described in any one of claims 1-4, characterized in that, The steps include: A. Opening an installation hole longitudinally at the monitoring position, with the hole diameter larger than the outer contour of the settlement ring (2) after the sinking piece (23) is inserted into the slot (22); B. Lowering the guide tube (1); C. Installing the settlement rings (2) one by one from bottom to top: The sinking piece (23) of the settlement ring (2) to be installed is inserted into the slot (22), the body (21) is fitted outside the guide tube (1), and after sinking to the designated position, a drive rod (41) is inserted into the guide tube (1). The lower end of the drive rod (41) has a drive head (42), and the drive head (42) has a magnetic block (43) that corresponds one-to-one with the iron block (24) on the body (21). Rotate the drive rod (41) until the sinking piece (23) is extended outward. After each settlement ring (2) is installed, soil is filled so that the outside of the guide tube (1) between adjacent settlement rings (2) is filled with soil.

5. The installation method of the foundation settlement monitoring device according to claim 4, characterized in that, In step C, when installing the bottommost settlement ring (2), soil is first filled into the installation hole outside the guide tube (1) to support the settlement ring (2).

6. A method for monitoring foundation settlement using the foundation settlement monitoring device according to any one of claims 1-4, characterized in that, The process includes the following steps: D. Lowering the position sensing unit into the conduit (1) and then slowly injecting water into the conduit (1); E. Monitoring the pressure value of the position sensing unit and recording the amount of water injected in real time to obtain the initial position information of each settling ring (2); F. Performing the same monitoring as in step E to obtain the latest position information of each settling ring (2) and judging the settling situation of each settling ring (2) by comparing the position changes of each settling ring (2).

Images