Pile foundation settlement monitoring device

Abstract

The utility model discloses a pile foundation settlement monitoring device, and belongs to the technical field of settlement monitoring. Comprising a supporting frame used for being fixed to a pile foundation, a universal joint is fixed to the supporting frame, a plumb bob is fixed to the universal joint, the plumb bob is movably connected to the supporting frame through the universal joint, a laser range finder is fixed to the plumb bob, and a light beam of the laser range finder coincides with a vertical line of the plumb bob; through the gravity self-balancing design of the universal joint and the plumb bob, light beams of the laser range finder are made to be perpendicular all the time, a precise motor or a complex transmission structure is not needed, the manufacturing cost and the maintenance difficulty are reduced, and the laser range finder is convenient to use. And synchronous monitoring of settlement and inclination of the pile foundation is achieved based on the height difference value of the laser range finders.

Description

Technical Field

[0001] This application relates to the field of settlement monitoring technology, and more specifically, to a pile foundation settlement monitoring device. Background Technology

[0002] Pile foundations are the basis for building and bridge construction, upon which the main structure of the building or bridge is subsequently built. Due to environmental factors such as soil conditions, pile foundations may experience displacement and settlement within a certain timeframe. Typically, a permanent reference point is located far from the pile foundation, and a total station is set up at this point to monitor the displacement and settlement of the pile foundation. However, this monitoring method is difficult to implement in real time.

[0003] The document with publication number CN119531432B provides a pile foundation settlement monitoring device. This device measures the angle of pile foundation deflection around the positioning tube by a first angle monitoring switch and the angle of pile foundation deflection around a second direction by a second angle monitoring switch. Since the second direction and the axis of the positioning tube are in a skew perpendicular state, the above two angles can be combined to calculate the tilt direction of the pile foundation. At the same time, the above two angles can be used to measure the angle of pile foundation tilt relative to the horizontal plane, thereby realizing pile foundation offset measurement.

[0004] Although the existing technical solutions mentioned above can achieve the relevant beneficial effects through the existing technical structure, they still have the following defects: the overall structure of the device is complex, and complex structures usually involve many connection links, which makes the assembly process cumbersome and significantly increases the difficulty of troubleshooting and parts replacement during later maintenance. At the same time, the device can only monitor the tilt angle and cannot monitor the settlement of the pile foundation.

[0005] In view of this, we propose a pile foundation settlement monitoring device. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] The purpose of this application is to provide a pile foundation settlement monitoring device that solves the technical problems in the background art, simplifies the overall structure of settlement monitoring, and simultaneously monitors the tilt and settlement of the pile foundation.

[0008] 2. Technical Solution

[0009] This application provides a pile foundation settlement monitoring device, comprising: a support frame for fixing on the pile foundation, a universal joint fixed on the support frame, a plumb bob fixed on the universal joint, the plumb bob being movably connected to the support frame through the universal joint, and a laser rangefinder fixed on the plumb bob, the laser beam of the laser rangefinder coinciding with the vertical line of the plumb bob.

[0010] It also includes a positioning base, which is placed below the laser rangefinder.

[0011] As an optional solution to the technical solution in this application, the support frame includes a clamp, and a support arm is fixed to one side of the clamp;

[0012] The universal joint includes a spherical shell fixed to the support arm, and a steel ball is movably connected inside the spherical shell;

[0013] The steel ball and the plumb bob are fixed together by a connecting pipe.

[0014] As an optional solution to the technical solution in this application, the clamp is threaded with multiple adjusting bolts.

[0015] As an optional solution to the technical solution of this application, the positioning seat has a groove, and a positioning rod is fixed at the center of the groove.

[0016] As an optional solution to the technical solution of this application, a dustproof shell is fixed on the support arm, a telescopic cylinder is fixed at the lower end of the dustproof shell, and the lower edge of the telescopic cylinder is fixed on the positioning seat.

[0017] The universal joint, plumb bob, and laser rangefinder are housed inside a dustproof casing and a telescopic cylinder.

[0018] As an optional solution to the technical solution in this application, a storage battery and a wireless transmitter are fixed inside the dustproof housing.

[0019] 3. Beneficial effects

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] 1. This application uses the gravity self-balancing design of universal joint and plumb bob to ensure that the laser rangefinder beam is always vertical, without relying on precision motors or complex transmission structures, thus reducing manufacturing costs and maintenance difficulty. Based on the height difference of the laser rangefinder, it realizes the synchronous monitoring of pile foundation settlement and tilt.

[0022] 2. This application cleverly introduces a threshold judgment function through the design of the positioning seat groove and the positioning rod. When the beam leaves the positioning rod and triggers the H3 mutation, the response efficiency of abnormal tilt is significantly improved.

[0023] 3. This application effectively resists wind, rain, dust and mechanical interference through the integrated protective design of telescopic cylinder and dustproof shell, ensuring the long-term stable operation of core components. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a pile foundation settlement monitoring device disclosed in a preferred embodiment of this application;

[0025] Figure 2 A pile foundation settlement monitoring device is disclosed in a preferred embodiment of this application. Figure 1 Enlarged structural diagram at point A in the middle;

[0026] Figure 3 This is a schematic diagram of the pile foundation tilt monitoring state of a pile foundation settlement monitoring device disclosed in a preferred embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the pile foundation settlement monitoring status of a pile foundation settlement monitoring device disclosed in a preferred embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the positioning seat structure of a pile foundation settlement monitoring device disclosed in a preferred embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the dustproof shell, telescopic cylinder, and positioning seat structure of a pile foundation settlement monitoring device disclosed in a preferred embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the internal structure of the dustproof shell of a pile foundation settlement monitoring device disclosed in a preferred embodiment of this application;

[0031] The labels in the diagram are as follows: 10. Support frame; 11. Clamp; 12. Adjusting bolt; 13. Support arm;

[0032] 20. Universal joint; 21. Ball shell; 22. Steel ball;

[0033] 30. Plumb bob; 31. Connecting pipe;

[0034] 40. Laser rangefinder;

[0035] 50. Positioning seat; 51. Groove; 52. Positioning rod;

[0036] 60. Dustproof casing; 61. Telescopic cylinder; 62. Storage battery; 63. Wireless transmitter. Detailed Implementation

[0037] The present application will be further described in detail below with reference to the accompanying drawings.

[0038] like Figures 1-7As shown, a pile foundation settlement monitoring device includes: a support frame 10 for fixing on the pile foundation, a universal joint 20 fixed on the support frame 10, a plumb bob 30 fixed on the universal joint 20, and the plumb bob 30 being movably connected to the support frame 10 through the universal joint 20. When the pile foundation tilts, the beam of the laser rangefinder 40 fixed at the lower end of the plumb bob 30 is always in a vertical state due to the free rotation of the plumb bob 30 under the action of gravity and the universal joint 20, that is, the beam of the laser rangefinder 40 and the vertical line of the plumb bob 30 always coincide.

[0039] It also includes a positioning base 50, which is placed below the laser rangefinder 40. Initially, the height between the laser rangefinder 40 and the positioning base 50 is H1. When the pile foundation tilts (e.g....), Figure 3 As shown), with the cooperation of the universal joint 20 and the plumb bob 30, the laser rangefinder 40 is always in a vertical state. At this time, the height between the tilted laser rangefinder 40 and the positioning seat 50 is H3. The greater the difference between H1 and H3, the greater the inclination of the pile foundation.

[0040] After the pile foundation settles downward (such as) Figure 4 As shown in the figure, the height of the laser rangefinder 40 from the positioning base 50 is H2, and the difference between H1 and H2 is the settlement height.

[0041] This enables simultaneous monitoring of pile foundation settlement and tilt, and the structure is simpler.

[0042] like Figure 2 , Figure 6 As shown, the support frame 10 includes a clamp 11, which can be used to fix the support frame 10 to the pile foundation. Then, the universal joint 20, the plumb bob 30 and the laser rangefinder 40 are supported by the support arm 13 fixed on one side of the clamp 11.

[0043] The universal joint 20 includes a spherical shell 21 fixed on the support arm 13. The spherical shell 21 has a two-lobed structure. The inner diameter of the spherical shell 21 is adapted to the outer diameter of the steel ball 22, and the openings at both ends are smaller than the diameter of the steel ball 22, so that the steel ball 22 can move freely in the spherical shell 21 without falling off. Furthermore, by allowing the steel ball 22 to rotate freely in the spherical shell 21, it is possible to monitor the tilt of the pile foundation in any direction.

[0044] The steel ball 22 is fixed to the plumb bob 30 by the connecting tube 31, and the wire of the laser rangefinder 40 passes through the plumb bob 30, the connecting tube 31 and the steel ball 22 to avoid the wire affecting the free rotation of the steel ball 22.

[0045] like Figure 6As shown, multiple adjusting bolts 12 are threaded onto the clamp 11 to clamp and fix piles of different outer diameters. At the same time, the horizontal position of the laser rangefinder 40 can be adjusted by adjusting the screws 12 in different positions.

[0046] like Figure 3 , Figure 5 As shown, a groove 51 is opened on the upper surface of the positioning seat 50, and a positioning rod 52 is fixed in the center of the groove 51. The positioning seat 50 is installed below the laser rangefinder 40, and the positioning rod 52 is placed directly below the laser rangefinder 40. When the pile foundation is tilted within the set tilt angle range, the beam of the laser rangefinder 40 always acts on the upper surface of the positioning rod 52.

[0047] When the tilt angle of the pile foundation exceeds the set maximum tilt angle, the beam of the laser rangefinder 40 detaches from the positioning rod 52 and acts on the bottom wall of the groove 51, causing the difference between the measured height H3 and the initial height H1 to increase instantaneously, so that the monitoring personnel can make a quick judgment.

[0048] like Figure 6 By fixing a dust cover 60 to the support arm 13, a telescopic cylinder 61 is fixed to the lower end of the dust cover 60, and the lower edge of the telescopic cylinder 61 is fixed to the positioning seat 50.

[0049] The universal joint 20, the plumb bob 30, and the laser rangefinder 40 are placed inside the dustproof housing 60 and the telescopic cylinder 61. Through the joint cooperation of the dustproof housing 60 and the telescopic cylinder 61, the universal joint 20, the plumb bob 30, and the laser rangefinder 40 are protected from rain and dust. At the same time, it can also prevent the plumb bob 30 from swinging and affecting normal monitoring in strong winds.

[0050] like Figure 7 As shown, a battery 62 and a wireless transmitter 63 are fixed inside the dustproof housing 60. The battery 62 powers the laser rangefinder 40 and the wireless transmitter 63. The laser rangefinder 40 connects to the wireless transmitter via a data interface (such as UART / I). 2 C) Output real-time altitude data to wireless transmitter 63; the transmitter encapsulates the data according to a preset protocol (such as Bluetooth, Wi-Fi or LoRa) and wirelessly transmits it to the terminal device (mobile APP or monitoring room server), and finally realizes the visualization display and remote monitoring of the data through parsing software, completing the closed-loop process from acquisition, transmission to reception.

[0051] Working principle: A concrete base is poured and formed on one side of the pile foundation, and the positioning seat 50 is fixed to the concrete base with expansion bolts;

[0052] The device is then installed on the pile foundation using clamp 11, and the laser rangefinder 40 is aligned with the positioning rod 52 by adjusting the adjusting bolt 12. The laser rangefinder 40 is powered by the battery 62.

[0053] After adjustment, record the initial height H1 between the laser rangefinder 40 and the positioning rod 52. When the pile foundation is tilted, the laser rangefinder 40 remains vertical with the cooperation of the plumb bob 30 and the universal joint 20. When the pile foundation tilts and / or settles, the tilt and / or settlement of the pile foundation can be monitored by the difference between the initial height H1 and the measured height H2 or H3. When the difference increases instantaneously, it indicates that the tilt of the pile foundation exceeds the threshold.

[0054] Meanwhile, the data measured by the laser rangefinder 40 is transmitted in real time to the terminal device via the wireless transmitter 63, which can also realize real-time data monitoring of tilt and / or sedimentation.

Claims

1. A pile foundation settlement monitoring device, characterized in that: include: A support frame (10) for fixing on the pile foundation, a universal joint (20) is fixed on the support frame (10), a plumb bob (30) is fixed on the universal joint (20), the plumb bob (30) is movably connected to the support frame (10) through the universal joint (20), a laser rangefinder (40) is fixed on the plumb bob (30), and the beam of the laser rangefinder (40) coincides with the vertical line of the plumb bob (30); It also includes a positioning base (50) which is positioned below the laser rangefinder (40).

2. The pile foundation settlement monitoring device according to claim 1, characterized in that: The support frame (10) includes a clamp (11), and a support arm (13) is fixed to one side of the clamp (11); The universal joint (20) includes a spherical shell (21) fixed on the support arm (13), and a steel ball (22) is movably connected inside the spherical shell (21); The steel ball (22) and the plumb bob (30) are fixed by a connecting pipe (31).

3. The pile foundation settlement monitoring device according to claim 2, characterized in that: The clamp (11) is threaded with multiple adjusting bolts (12).

4. The pile foundation settlement monitoring device according to claim 1, characterized in that: The positioning seat (50) has a groove (51) and a positioning rod (52) is fixed in the center of the groove (51).

5. A pile foundation settlement monitoring device according to claim 2, characterized in that: A dust cover (60) is fixed on the support arm (13), and a telescopic cylinder (61) is fixed at the lower end of the dust cover (60). The lower edge of the telescopic cylinder (61) is fixed on the positioning seat (50). The universal joint (20), plumb bob (30), and laser rangefinder (40) are placed inside the dustproof shell (60) and telescopic cylinder (61).

6. The pile foundation settlement monitoring device according to claim 5, characterized in that: The dustproof housing (60) contains a storage battery (62) and a wireless transmitter (63).

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