Automatic monitoring device and monitoring method for displacement of pile top of PC pipe pile

Abstract

The invention discloses an automatic monitoring device and method for the pile top displacement of a PC pipe pile. The automatic monitoring device comprises a pile top platform, a telescopic scale frame, first intermediate equipment, second intermediate equipment and terminal equipment. The pile top platform leveling frame is arranged at the pile top under the ground, a telescopic scale frame upwards extending out of the ground is vertically erected on the pile top platform, and a first laser transmitter and a second laser transmitter are arranged on the pile top platform; the telescopic scale frame is provided with a first reflecting mirror for reflecting light rays emitted by the first laser emitter to the first intermediate equipment, and the telescopic scale frame is provided with a second reflecting mirror for reflecting light rays emitted by the second laser emitter to the second intermediate equipment; and the terminal equipment receives remote signals of the first intermediate equipment and the second intermediate equipment so as to monitor the pile top displacement. According to the device and the method, the displacement of the pile top of the PC pipe pile can be continuously monitored at high precision, the labor intensity of personnel is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of photoelectric detection technology, and in particular to an automatic monitoring device and a monitoring method for the displacement of a PC pipe pile top. Background Art

[0002] PC pipe piles are a common deep foundation. PC pipe piles are generally constructed by static pressure, hammering and other methods. PC pipe piles are generally squeezed soil piles. During the construction of PC pipe pile groups, the squeezed soil effect will cause horizontal or vertical displacement of adjacent constructed PC pipe piles. Excessive horizontal or vertical displacement will seriously affect the bearing capacity of PC pipe piles. In order to alleviate this adverse effect, it is necessary to monitor the horizontal and vertical displacement of the affected PC pipe piles. Since a cap is set on the top of the pile group, the top of the PC pipe pile is mostly located at a certain depth below the ground surface when the construction is completed. This brings inconvenience to the monitoring of the horizontal and vertical displacement of the top of the PC pipe pile. Traditional monitoring methods mostly use the type of telescopic rod + prism + total station. However, the displacement measured by this method is greatly affected by the verticality and stiffness of the telescopic rod, and may produce large errors. In addition, it is difficult to achieve continuous monitoring with the existing monitoring method, and the labor cost is high when the monitoring frequency is high. Therefore, the existing technology needs to be improved and developed. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an automatic monitoring device and method for the displacement of the top of a PC pipe pile, which can achieve high-precision and continuous monitoring of the displacement of the top of a PC pipe pile, reduce the labor intensity of personnel, and improve work efficiency.

[0004] In order to solve the above problems, the present invention provides an automatic monitoring device for the top displacement of a PC pipe pile, comprising a pile top platform, a telescopic scale frame, a first intermediate device, a second intermediate device and a terminal device; the pile top platform is leveled and erected at the top of the pile below the ground, a telescopic scale frame extending upward from the ground is vertically erected on the pile top platform, and a first laser emitter and a second laser emitter are provided on the pile top platform; a first reflector for reflecting light emitted by the first laser emitter to the first intermediate device is provided on the telescopic scale frame, and a second reflector for reflecting light emitted by the second laser emitter to the second intermediate device is provided on the telescopic scale frame; the terminal device receives remote signals from the first intermediate device and the second intermediate device to monitor the displacement of the pile top.

[0005] Preferably, the first intermediate device and the second intermediate device are both installed on the ground, the angle between the first intermediate device and the second intermediate device and the axis of the pipe pile is 90°, and the length of the line between the first intermediate device and the second intermediate device and the axis of the pipe pile is greater than the length of the pipe pile.

[0006] Preferably, a plurality of leveling devices are provided below the pile top platform, and the leveling devices support the pile top platform on the pile top and adjust the pile top platform to be horizontal.

[0007] Preferably, the first intermediate device and the second intermediate device both include a scale frame, a laser photoreceptor, an electrical signal processor and a wireless transmission device, wherein the scale frame is raised above the ground to support the laser photoreceptor, and the electrical signal processor converts the optical signal into an electrical signal which is then remotely sent to the terminal device via the wireless transmission device.

[0008] Preferably, the terminal device includes a data processor, a signal receiver and a display; the signal receiver receives remote signals sent by the first intermediate device and the second intermediate device, and the remote signals are converted, processed and analyzed by the data processor to display the pile top displacement monitoring data on the display.

[0009] A monitoring method for an automatic monitoring device for the displacement of a PC pipe pile top comprises the following steps:

[0010] S1. Install a pile top platform with a first laser emitter and a second laser emitter on the top of the PC pile to be tested, install a first intermediate device and a second intermediate device at a distance of more than 1 times the length of the PC pile to be tested, and test the installation of a remote signal connection terminal device of the first intermediate device and the second intermediate device;

[0011] S2. Adjust the verticality of the first laser emitter and the second laser emitter by an automatic leveling device;

[0012] S3. The first laser emitter and the second laser emitter generate high-precision laser beams, which are reflected by the first reflector and the second reflector to the laser photoreceptors of the first intermediate device and the second intermediate device, respectively;

[0013] S4. After receiving the optical signal, the laser photoreceptor converts it into an electrical signal, which is then transmitted to the electrical signal processor and then transmitted to the terminal device via a wireless transmission device;

[0014] S5. The signal receiver on the terminal device receives the electrical signal; the data processor on the terminal device processes the received electrical signal;

[0015] S6. Repeat steps S3 to S5 and record the test results.

[0016] The advantages of the present invention compared with the prior art are:

[0017] The present invention discloses an automatic monitoring device and method for the top displacement of a PC pipe pile. The device and method can realize high-precision and continuous monitoring of the top displacement of a PC pipe pile, reduce the labor intensity of personnel, and improve work efficiency. Specifically, the laser emission directions of the first and second laser emitters are adjusted on the pile top by a pile top platform with a leveling device, so that the lasers are reflected by the first and second reflectors and then irradiated on the first and second intermediate devices, so as to replace the existing total station to continuously monitor the pile top displacement with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a vertical arrangement diagram of the PC pipe pile top displacement monitoring device in the present invention;

[0020] Figure 2 It is a structural schematic diagram of the pile top platform in the present invention;

[0021] Figure 3 It is a plan view of the PC pipe pile top displacement monitoring device in the present invention.

[0022] In the figure: 1-second reflector; 2-first reflector; 3-telescopic scale frame; 4-first intermediate equipment; 5-terminal equipment; 6-pile top platform; 7-leveling device; 8-pile; 9-first laser emitter; 10-second laser emitter; 11-second intermediate equipment. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0026] Combination Figure 1 to Figure 3 An automatic monitoring device for the displacement of a PC pipe pile top of the present invention comprises a pile top platform 6, a telescopic scale frame 3, a first intermediate device 4, a second first intermediate device 1 and a terminal device 5; the pile top platform is leveled and erected at the pile top below the ground, a telescopic scale frame extending upward from the ground is vertically erected on the pile top platform, and a first laser emitter 9 and a second first laser emitter 0 are arranged on the pile top platform; a first reflector 2 for reflecting light emitted by the first laser emitter to the first intermediate device is arranged on the telescopic scale frame, and a second reflector 1 for reflecting light emitted by the second laser emitter to the second intermediate device is arranged on the telescopic scale frame; the terminal device receives remote signals from the first intermediate device and the second intermediate device to monitor the displacement of the pile top.

[0027] Preferably, the first intermediate device and the second intermediate device are both installed on the ground, the angle between the first intermediate device and the second intermediate device and the axis line of the pipe pile 8 is 90°, and the length of the axis line between the first intermediate device and the second intermediate device and the pipe pile is greater than the length of the pipe pile.

[0028] Preferably, a plurality of leveling devices 7 are provided below the pile top platform, and the leveling devices support the pile top platform on the pile top and adjust the pile top platform to be horizontal.

[0029] Preferably, the first intermediate device and the second intermediate device both include a scale frame, a laser photoreceptor, an electrical signal processor and a wireless transmission device, wherein the scale frame is raised above the ground to support the laser photoreceptor, and the electrical signal processor converts the optical signal into an electrical signal and then sends it remotely to the terminal device via the wireless transmission device.

[0030] Preferably, the terminal device includes a data processor, a signal receiver and a display; the signal receiver receives remote signals sent by the first intermediate device and the second intermediate device, and the remote signals are converted, processed and analyzed by the data processor to display the pile top displacement monitoring data on the display.

[0031] In addition, in the present invention, preferably, the leveling device adopts a mature product in the prior art, and the connection method of the leveling device for adjusting the horizontality of the pile top platform on the pile top adopts a mature technical means in the prior art.

[0032] The working principle of the present invention is:

[0033] The PC pipe pile top displacement automatic monitoring device of the present invention is composed of a pile top platform, a telescopic scale frame, a reflector, an intermediate device and a terminal device. The specific monitoring method includes the following steps:

[0034] S1. Assemble signal transmission equipment, intermediate equipment and terminal equipment on site;

[0035] S2. Install the signal transmitter on the top of the PC pile to be tested and adjust the verticality of the signal transmitter by the automatic leveling device;

[0036] S3. The first laser transmitter and the second laser transmitter located on the signal transmitting device can emit high-precision laser beams at a preset frequency. These laser beams are respectively reflected by the first reflector and the second reflector located above the telescopic scale frame (the reflectors are at an angle of 45° to the horizontal plane) to the horizontal direction and irradiate the laser photosensitive devices on the first intermediate device and the second intermediate device at a certain distance from the PC pile (the distance is greater than the influence range of the soil squeezing effect of the PC pile, generally more than 1 pile length), at which time the laser photosensitive device will generate an electrical signal;

[0037] S4. The electrical signal processor on the first intermediate device can calculate the displacement difference ΔY1 in the Y direction and the displacement difference ΔZ1 in the Z direction between the two laser irradiations by reading the strength of the electrical signal on the laser photosensitive device. The electrical signal processor on the second intermediate device can calculate the displacement difference ΔX1 in the X direction and the displacement difference ΔZ2 in the Z direction between the two laser irradiations by reading the strength of the electrical signal on the laser photosensitive device. The average value ΔZ3 of ΔZ1 and ΔZ2 is taken as the change value of the vertical displacement of the PC pipe pile, and ΔX1 and ΔY1 are taken as the change values ​​of the horizontal displacement of the PC pipe pile in the X direction and the Y direction respectively;

[0038] S5. The above displacement data can be transmitted to the surface terminal device in real time through the wireless transmission device located on the first intermediate device and the second intermediate device;

[0039] S6. The signal receiver on the terminal device receives the displacement data. The data processor on the terminal device processes the received displacement data to obtain the continuous monitoring data of the top displacement of the PC pipe pile;

[0040] S7. Determine the monitoring frequency according to the project progress and repeat steps S3 to S6.

[0041] The vertical arrangement of the automatic monitoring device for horizontal and vertical displacement of PC piles is as follows: Figure 1 shown.

[0042] The structure of the pile top platform is shown in the figure below. Figure 2 shown.

[0043] In order to monitor the displacement of PC piles in three directions, namely X, Y and Z, it is necessary to arrange intermediate equipment in the X and Y directions respectively. The plane layout of the monitoring device is as follows: Figure 3 shown.

[0044] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An automatic monitoring device for the displacement of the top of a PC pipe pile, characterized by: It includes a pile top platform, a telescopic scale frame, a first intermediate device, a second intermediate device and a terminal device; the pile top platform is leveled and erected at the pile top below the ground, a telescopic scale frame is vertically erected on the pile top platform and extends upward from the ground, and a first laser emitter and a second laser emitter are provided on the pile top platform; a first reflector is provided on the telescopic scale frame for reflecting the light emitted by the first laser emitter to the first intermediate device, and a second reflector is provided on the telescopic scale frame for reflecting the light emitted by the second laser emitter to the second intermediate device; the terminal device receives remote signals from the first intermediate device and the second intermediate device to monitor the displacement of the pile top.

2. The automatic monitoring device for the displacement of the top of a PC pipe pile according to claim 1, characterized in that: The first intermediate device and the second intermediate device are both installed on the ground, the angle between the first intermediate device and the second intermediate device and the axis of the pipe pile is 90°, and the length of the line between the first intermediate device and the second intermediate device and the axis of the pipe pile is greater than the length of the pipe pile.

3. The automatic monitoring device for the displacement of the top of a PC pipe pile according to claim 1 is characterized by: A plurality of leveling devices are arranged below the pile top platform, and the leveling devices support the pile top platform on the pile top and adjust the pile top platform to be horizontal.

4. The PC pipe pile top displacement automatic monitoring device according to claim 1 is characterized by: The first intermediate device and the second intermediate device both include a scale frame, a laser photoreceptor, an electrical signal processor and a wireless transmission device, wherein the scale frame is raised above the ground to support the laser photoreceptor, and the electrical signal processor converts the optical signal into an electrical signal and then sends it remotely to the terminal device via the wireless transmission device.

5. The automatic monitoring device for the displacement of the top of a PC pipe pile according to claim 1 is characterized by: The terminal device includes a data processor, a signal receiver and a display; the signal receiver receives remote signals sent by the first intermediate device and the second intermediate device, and the remote signals are converted, processed and analyzed by the data processor to display the pile top displacement monitoring data on the display.

6. A monitoring method for the automatic monitoring device for top displacement of PC pipe piles according to claim 1, characterized in that: The following steps are involved: S1. Install a pile top platform with a first laser emitter and a second laser emitter on the top of the PC pile to be tested, install a first intermediate device and a second intermediate device at a distance of more than 1 times the length of the PC pile to be tested, and test the installation of a remote signal connection terminal device of the first intermediate device and the second intermediate device; S2. Adjust the verticality of the first laser emitter and the second laser emitter by an automatic leveling device; S3. The first laser emitter and the second laser emitter generate high-precision laser beams, which are reflected by the first reflector and the second reflector to the laser photoreceptors of the first intermediate device and the second intermediate device, respectively; S4. After receiving the optical signal, the laser photoreceptor converts it into an electrical signal, which is then transmitted to the electrical signal processor and then transmitted to the terminal device via a wireless transmission device; S5. The signal receiver on the terminal device receives the electrical signal; the data processor on the terminal device processes the received electrical signal; S6. Repeat steps S3 to S5 and record the test results.

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