System for measuring deep horizontal displacement and layered settlement

Abstract

The utility model provides a system for measuring deep horizontal displacement and layered settlement. The system comprises an upper pipe body, a signal cable, a reference base, a lower pipe body, a telescopic joint pipe, a release type settlement ring, a pulley assembly, an inclinometer sensor, a transmission pipe joint, a PVC isolation ring, a settlement ring positioning sensor and a settlement pipe. According to the utility model, a split structure is adopted, the instrument can be installed during soil filling or during a construction period, settlement monitoring and construction can be synchronously carried out, and since an observation room and complicated operation and maintenance are not needed, settlement change process data of a whole filling area can be immediately obtained from the completion of installation of the bottommost sensor; the sensor adopts an intelligent magnetic displacement meter with a digital interface, so that an intelligent digital signal acquisition device can be used for acquisition, and monitoring data can be measured on line through a serial port of a personal computer.

Description

Technical Field

[0001] The utility model belongs to the technical field of geological body deformation monitoring, and in particular relates to a system for measuring deep horizontal displacement and stratified settlement. Background Art

[0002] With the rapid development of clean energy today, a large number of large hydropower station projects such as earth-rock dams and panel rockfill dams are being built at a rapid pace. Especially in the development of pumped-storage power stations, the number of panel rockfill dams under construction accounts for nearly 70% of all dam types. It is necessary to bury electromagnetic settlement meters in the panel rockfill dams during the construction period in order to observe the settlement of the dam and diagnose the health of the dam.

[0003] In the field of engineering safety detection, the traditional method of observing and measuring the settlement of buildings is to use electromagnetic settlement meters operated manually. The settlement measuring instrument is based on the principle of electromagnetic induction. Settlement monitoring points are placed at different elevations of the building, that is, the magnetic ring is mounted on the settlement tube. When the settlement probe detects the location of the settlement point, the buzzer sounds, and the sound disappears when it is far away from the settlement point. When the buzzer sounds, the operator first determines the position by subjective judgment through the sound, and then reads the position corresponding to the settlement point on the ruler by visual inspection and records the data. The operation process is: first place the probe to the pipe mouth, and the depth of the settlement pipe ranges from tens of meters to hundreds of meters. Then the operator pulls the ruler by hand to drag the probe down slowly. When the probe encounters the magnetic ring during the falling process, the buzzer will sound, and the operator will observe and record the scale on the ruler with his eyes. A project has multiple settlement observation holes, which are repeated several times until the entire measurement process is completed. Traditional electromagnetic settlement meters install settlement tubes by drilling holes, pre-buried with fill, etc., and set multiple magnetic rings in layers on the outside of the tube. A portable electromagnetic settlement meter (ruler) is used to measure the position changes of each magnetic ring relative to the reference magnet at the bottom of the hole through manual reading, thereby obtaining the stratified settlement of the soil.

[0004] In addition, the Chinese patent announcement number is CN103362114A, and the invention is named as a method for monitoring soil layer settlement. A measuring hole is drilled on the foundation, and then cement mortar is backfilled to the bottom of the measuring hole. The settlement tube is placed in the center of the measuring hole, and its bottom is inserted into the cement mortar. The distance between the outer circle of the settlement ring and the hole wall of the measuring hole is greater than 2cm; then the fiber grating displacement meter is connected to the fiber grating demodulator through the fiber grating cable. However, the existing traditional electromagnetic settlement instrument requires manual operation, and cannot realize automatic monitoring and remote telemetry, especially the problem of unable to monitor horizontal displacement.

[0005] In view of this, it is very necessary to invent a system for measuring deep horizontal displacement and stratified settlement. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a system for measuring deep horizontal displacement and stratified settlement, so as to solve the problem that the existing traditional electromagnetic sedimentation instrument requires manual operation, cannot realize automatic monitoring and remote telemetry, and especially cannot monitor horizontal displacement.

[0007] A system for measuring deep horizontal displacement and stratified settlement, comprising an upper pipe body, a signal cable, a reference base, a lower pipe body, a telescopic joint pipe, a release type settlement ring, a pulley assembly, an inclinometer sensor, a transfer pipe joint, a PVC isolation ring, a settlement ring positioning sensor and a settlement pipe,

[0008] The signal cable is embedded in the interior of the upper tube body from the top; a sealing cover is threadedly connected to the upper end of the upper tube body; the upper tube body and the lower tube body are threadedly connected to each other; the lower tube body is threadedly connected to the upper inner side of the expansion joint tube, and the settlement tube is threadedly connected to the lower inner side of the expansion joint tube; the releasable settlement ring is respectively sleeved on the outer surfaces of the upper tube body and the lower tube body; the pulley assembly is arranged inside the upper tube body and the lower tube body; the transfer pipe joint is threadedly connected to the upper part of the pulley assembly; the PVC isolation ring is threadedly connected to the upper part of the transfer pipe joint; the settlement ring positioning sensor is threadedly connected to the lower inner side of the transfer pipe joint.

[0009] Preferably, the pulley assembly includes a pulley connecting plate, a sensor fixing bolt, a tensioning wheel, a fixed wheel, a rotating joint and a horizontal displacement sensor, wherein the sensor fixing bolt is threadedly connected to the lower position of the pulley connecting plate; the fixed wheel bolt is connected to the upper right side of the inside of the pulley connecting plate; the tensioning wheel shaft is connected to the upper left side of the pulley connecting plate; the rotating joint screw is connected to the upper part of the pulley connecting plate; and the horizontal displacement sensor screw is connected to the upper positions of the front and rear sides of the pulley connecting plate.

[0010] Preferably, the lower part of the universal joint is a rotary joint, and the upper part of the universal joint is a wedge joint.

[0011] Preferably, the outer surface of the wedge-shaped joint is provided with threads; the wedge-shaped joint is threadedly connected to the lower inner side of the settlement ring positioning sensor.

[0012] Preferably, the horizontal displacement sensor has "+" and "-" marks on one end close to the signal cable; there are two types of wedge-shaped joints, namely single-end connection and double-end connection. The single-end connection wedge-shaped joint is installed on the settlement ring positioning sensor, the fixed wheel and the lower tube body, and the double-end joint is used for the extended upper tube body of the connecting tube; the wedge-shaped joint is composed of a connecting screw, a wedge-shaped expansion tube, a locking nut, a flat washer and an extended connecting screw; the wedge-shaped joint can withstand an axial tensile force of not less than 500kg.

[0013] Preferably, the horizontal displacement sensors are each equipped with a built-in thermistor for monitoring the ambient temperature.

[0014] Preferably, the sedimentation tube is a PVC, ABS or aluminum alloy sedimentation tube made of ordinary non-ferromagnetic materials.

[0015] Preferably, the outer shell of the settlement ring positioning sensor is a stainless steel sealed and waterproof structure, and signal transmission and power supply cables are provided at both ends of the settlement ring positioning sensor and connected to the signal cable. There are multiple settlement ring positioning sensors, and the cables at both ends of the settlement ring positioning sensor can be respectively connected to the settlement ring positioning sensors adjacent to it above and below.

[0016] Preferably, the transfer pipe joint adopts a standard 1″ straight national standard pipe joint.

[0017] Preferably, the PVC isolation ring is used for sedimentation pipes such as inclinometer pipes with larger inner diameters. It is placed above each pipe joint during installation to keep the transfer pipe centered or coaxial in the sedimentation pipe, reduce direct friction between the transfer pipe and the sedimentation pipe, and ensure that the transfer pipe transfers sensitively without compression deformation. When a sedimentation pipe with a smaller inner diameter is used, no isolation ring is set.

[0018] Preferably, the signal cable is a four-core communication and sensor power supply cable; except for the sensor at the bottom, all sensors are connected in series end to end through the signal cable, so only one cable is provided in each settling tube group to lead to the outside of the orifice to connect with the data acquisition device.

[0019] Preferably, the reference base is the reference of the transfer steel pipe, that is, the sensor. The reference point must be set in a stable position, and the bottom of the pipe is fixed using a steel plate, a steel pipe sleeve or concrete pouring.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The split structure is adopted, and the instrument can be installed during soil filling or construction. Settlement monitoring is carried out simultaneously with construction. Since there is no need to set up an observation room, complicated operation and maintenance are not required, the settlement change process data of the entire landfill area can be immediately obtained from the completion of the installation of the bottom sensor. In addition, this device can also transform the existing artificial electromagnetic settlement tube to realize the automatic monitoring of layered settlement; since the sensor adopts an intelligent magnetic displacement meter with a digital interface, it can be collected using an intelligent digital signal acquisition device, and the monitoring data can also be measured online through the serial port of a personal computer.

[0022] The horizontal displacement sensor has "+" and "-" marks on one end near the signal cable. When the sensor is placed in a horizontal state, the output reading should be close to 0 if the cable is connected correctly and the sensor is placed horizontally.

[0023] The horizontal displacement sensors are all equipped with a thermistor for monitoring the ambient temperature; the universal joint and the rotary joint are used to adapt to the bending deformation of the inclinometer tube and the irregular distortion of the guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the internal section of the utility model.

[0026] Figure 3 It is a structural schematic diagram of the pulley assembly of the utility model.

[0027] In the figure:

[0028] 1. Upper tube body; 2. Signal cable; 3. Reference base; 4. Lower tube body; 6. Telescopic joint tube; 7. Release type sedimentation ring; 8. Pulley assembly; 81. Pulley connecting plate; 82. Sensor fixing bolt; 83. Tensioning wheel; 84. Fixed wheel; 85. Universal joint; 851. Rotary joint; 852. Wedge joint; 86. Horizontal displacement sensor; 9. Inclinometer sensor; 11. Transfer pipe joint; 12. PVC isolation ring; 13. Sedimentation ring positioning sensor; 14. Sedimentation tube. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings:

[0030] Example:

[0031] As attached Figure 1 To Attachment Figure 2As shown, the utility model provides a system for measuring deep horizontal displacement and stratified settlement, including an upper pipe body 1, a signal cable 2, a reference base 3, a lower pipe body 4, a telescopic joint pipe 6, a release type settlement ring 7, a pulley assembly 8, an inclinometer sensor 9, a transfer pipe joint 11, a PVC isolation ring 12, a settlement ring positioning sensor 13 and a settlement pipe 14.

[0032] The signal cable 2 is embedded in the interior of the upper tube body 1 from the top; the upper end of the upper tube body 1 is threadedly connected with a sealing cover; the upper tube body 1 and the lower tube body 4 are threadedly connected; the lower tube body 4 is threadedly connected to the upper inner side of the expansion joint tube 6, and the settlement tube 14 is threadedly connected to the lower inner side of the expansion joint tube 6; the releasable settlement ring 7 is respectively sleeved on the outer surfaces of the upper tube body 1 and the lower tube body 4; the pulley assembly 8 is arranged in the upper tube body 1 and the lower tube body 4; the transfer pipe joint 11 is threadedly connected to the upper part of the pulley assembly 8; the PVC isolation ring 12 is threadedly connected to the upper part of the transfer pipe joint 11; the settlement ring positioning sensor 13 is threadedly connected to the lower inner side of the transfer pipe joint 11.

[0033] As attached Figure 3 As shown, in the above implementation scheme, specifically, the pulley assembly 8 includes a pulley connecting plate 81, a sensor fixing bolt 82, a tensioning wheel 83, a fixed wheel 84, a universal joint 85 and a horizontal displacement sensor 86, the sensor fixing bolt 82 is threadedly connected to the lower position of the pulley connecting plate 81; the fixed wheel 84 is bolted to the upper right side of the inside of the pulley connecting plate 81; the tensioning wheel 83 is axially connected to the upper left side of the pulley connecting plate 81; the universal joint 85 is screwed to the upper part of the pulley connecting plate 81; the horizontal displacement sensor 86 is screwed to the upper positions of the front and rear sides of the pulley connecting plate 81.

[0034] In the above implementation scheme, specifically, the lower part of the universal joint 85 is the universal joint 851, and the upper part of the universal joint 85 is the wedge joint 852; the outer surface of the wedge joint 852 is provided with a thread; the wedge joint 852 is threadedly connected to the inner lower side of the settlement ring positioning sensor 13.

[0035] In the above implementation scheme, specifically, the horizontal displacement sensor 86 has "+" and "-" marks on one end close to the signal cable 2; the wedge joint 852 has two types, namely single-end connection and double-end connection. The single-end connected wedge joint is installed on the sedimentation ring positioning sensor 13, the fixed wheel 84 and the lower tube body 4, and the double-end joint is used for connecting the extended upper tube body 1 of the tube; the wedge joint 852 is composed of a connecting screw, a wedge expansion tube, a locking nut, a flat washer and an extended connecting screw; the wedge joint 852 can withstand an axial tensile force of not less than 500kg.

[0036] In the above implementation scheme, specifically, the horizontal displacement sensor 86 is equipped with a thermistor for monitoring the ambient temperature.

[0037] In the above embodiment, specifically, the sedimentation tube 14 is a PVC, ABS or aluminum alloy sedimentation tube made of ordinary non-ferromagnetic materials.

[0038] In the above implementation scheme, specifically, the outer shell of the settlement ring positioning sensor 13 is a stainless steel sealed and waterproof structure, and both ends of the settlement ring positioning sensor 13 are provided with signal transmission and power supply cables connected to the signal cable 2, and there are multiple settlement ring positioning sensors 13, and the cables at both ends of the settlement ring positioning sensor 13 can be respectively connected to the settlement ring positioning sensors 13 adjacent to the upper and lower sides.

[0039] In the above embodiment, specifically, the transfer pipe joint 11 adopts a standard 1″ straight national standard pipe joint.

[0040] In the above implementation scheme, specifically, the PVC isolation ring 12 is used for a sedimentation pipe such as an inclinometer pipe with a larger inner diameter. It is placed above each pipe joint during installation to keep the transfer pipe centered or coaxial in the sedimentation pipe, reduce the direct friction between the transfer pipe and the sedimentation pipe, and ensure that the transfer pipe is sensitive to transmission without compression deformation. When a sedimentation pipe with a smaller inner diameter is used, no isolation ring is set.

[0041] In the above implementation scheme, specifically, the signal cable 2 is a four-core communication and sensor power supply cable, wherein the black and red core wires are the positive and negative poles of the power supply, and the green and white core wires are the D+ and D- signals of RS485 respectively; except for the sensor at the bottom, all sensors are connected in series end to end through the signal cable 2, so only one cable is arranged in each settling tube group to lead to the outside of the orifice to connect with the data acquisition device.

[0042] In the above implementation scheme, specifically, the reference base 3 is the reference of the transfer steel pipe, that is, the sensor. The reference point must be set in a stable position, and the bottom of the pipe must be fixed using a steel plate, a steel pipe sleeve or concrete pouring.

[0043] In the above implementation scheme, specifically, the data acquisition can use BSIL-D1DS / CAMPBELL data acquisition instrument, which can automatically collect data for up to 16 sensors. BSIL-D1 data acquisition instrument can store no less than 3000 measurement data of each sensor. The data acquisition instrument can be powered by 220V AC adapter, and can also be powered by solar cells. It has a built-in rechargeable battery to maintain the device working for more than 1 month (measure once a day); in addition, BSIL-D1DS data acquisition instrument can also be connected to GPRS / CDMA wireless transmission module to achieve remote transmission; the instrument can be installed during soil filling or construction period, and settlement monitoring is carried out simultaneously with construction. Since there is no need to set up an observation room, no complicated operation and maintenance is required, the settlement change process data of the entire landfill area can be immediately obtained from the completion of the installation of the bottom sensor. In addition, the device can also be used to transform existing artificial electromagnetic sedimentation tubes to achieve automated monitoring of stratified sedimentation; since the sensor uses an intelligent magnetic displacement meter with a digital interface, it can be collected using an intelligent digital signal acquisition device, and the monitoring data can also be measured online through the serial port of a personal computer.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A system for measuring deep horizontal displacement and stratified settlement, characterized in that: The system for measuring deep horizontal displacement and stratified settlement comprises an upper pipe body (1), a signal cable (2), a reference base (3), a lower pipe body (4), a telescopic joint pipe (6), a release type settlement ring (7), a pulley assembly (8), an inclinometer sensor (9), a transfer pipe joint (11), a PVC isolation ring (12), a settlement ring positioning sensor (13) and a settlement pipe (14). The signal cable (2) is embedded in the interior of the upper tube body (1) from the top; the upper end of the upper tube body (1) is threadedly connected with a sealing cover; the upper tube body (1) and the lower tube body (4) are threadedly connected; the lower tube body (4) is threadedly connected to the upper side of the expansion joint tube (6), and the settlement tube (14) is threadedly connected to the lower side of the expansion joint tube (6); the release type settlement ring (7) is respectively sleeved on the outer surface of the upper tube body (1) and the lower tube body (4); the pulley assembly (8) is arranged in the interior of the upper tube body (1) and the lower tube body (4); the transfer pipe joint (11) is threadedly connected to the upper part of the pulley assembly (8); the PVC isolation ring (12) is threadedly connected to the upper part of the transfer pipe joint (11); the settlement ring positioning sensor (13) is threadedly connected to the lower side of the interior of the transfer pipe joint (11).

2. The system for measuring deep horizontal displacement and stratified settlement according to claim 1, characterized in that: The pulley assembly (8) comprises a pulley connecting plate (81), a sensor fixing bolt (82), a tensioning wheel (83), a fixed wheel (84), a universal joint (85) and a horizontal displacement sensor (86), wherein the sensor fixing bolt (82) is threadedly connected to the lower position of the pulley connecting plate (81); the fixed wheel (84) is bolted to the upper right side of the inside of the pulley connecting plate (81); the tensioning wheel (83) is axially connected to the upper left side of the pulley connecting plate (81); the universal joint (85) is screwed to the upper part of the pulley connecting plate (81); and the horizontal displacement sensor (86) is screwed to the upper positions of the front and rear sides of the pulley connecting plate (81).

3. The system for measuring deep horizontal displacement and stratified settlement according to claim 2, characterized in that: The lower part of the universal joint (85) is a rotary joint (851), and the upper part of the universal joint (85) is a wedge joint (852).

4. The system for measuring deep horizontal displacement and stratified settlement according to claim 3, characterized in that: The outer surface of the wedge-shaped joint (852) is provided with threads; the wedge-shaped joint (852) is threadedly connected to the lower inner side of the settlement ring positioning sensor (13).

5. The system for measuring deep horizontal displacement and stratified settlement according to claim 2, characterized in that: The horizontal displacement sensor (86) has "+" and "-" marks on one end close to the signal cable (2).

6. The system for measuring deep horizontal displacement and stratified settlement according to claim 3, characterized in that: There are two types of wedge-shaped joints (852), namely single-end connection and double-end connection. The single-end connection wedge-shaped joint is installed on the sinking ring positioning sensor (13), the fixing wheel (84) and the lower pipe body (4), and the double-end joint is used for connecting the extended upper pipe body (1); the wedge-shaped joint (852) is composed of a connecting screw, a wedge-shaped expansion tube, a locking nut, a flat washer and an extended connecting screw; the wedge-shaped joint (852) can withstand an axial tensile force of not less than 500kg.

7. The system for measuring deep horizontal displacement and stratified settlement according to claim 1, characterized in that: The sedimentation tube (14) is a PVC, ABS or aluminum alloy sedimentation tube made of common non-ferromagnetic materials.

8. The system for measuring deep horizontal displacement and stratified settlement according to claim 1, characterized in that: The housing of the sinking ring positioning sensor (13) is a stainless steel sealed waterproof structure. Signal transmission and power supply cables are provided at both ends of the sinking ring positioning sensor (13) and are connected to the signal cable (2). A plurality of sinking ring positioning sensors (13) are provided. The cables at both ends of the sinking ring positioning sensor (13) can be respectively connected to the sinking ring positioning sensors (13) adjacent to the sinking ring positioning sensors (13) above and below.

9. The system for measuring deep horizontal displacement and stratified settlement according to claim 1, characterized in that: The signal cable (2) is a four-core communication and sensor power supply cable; except for the sensor at the bottom, all sensors are connected end to end via the signal cable (2), so only one cable is provided in each settling tube group and led to the outside of the orifice to connect with the data acquisition device.

10. The system for measuring deep horizontal displacement and stratified settlement according to claim 1, characterized in that: The PVC isolation ring (12) is used for a sedimentation pipe such as an inclinometer pipe with a larger inner diameter.

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