CN106643633A - Landslide body deep part creep deformation monitoring device and measuring method thereof - Google Patents

Abstract

The invention discloses a creep monitoring device for the deep part of a landslide body, which comprises a sealing cover, a rubber plug, an O-ring, a circuit cabin, a casing, a motor seat, a stepping motor, a displacement meter, a limit plate, a base, a centering plate, a lower Connectors, lock nuts, turntables, sensor seats, screws, long-leg bolts, fixing bolts, circuit seats, upper joints and cables; the upper end of the circuit compartment is connected to the lower end of the upper joint, and a displacement gauge is installed on each sensor seat , The displacement gauge is installed on the sensor seat by screws. At the same time, the invention also discloses a method for measuring deep creep of landslide body. In the measurement method, the monitoring device is lowered to different depths of the landslide body by using a drilling rig, and the main landslide orientation and displacement of the landslide body can be calculated by using the monitoring device. The invention can monitor the small displacement in the deep part of the landslide body in real time, and the measurement data is more reliable and accurate.

Description

A deep creep monitoring device of landslide body and its measurement method

technical field

The invention relates to an instrument capable of measuring small deformation displacements in the deep part of a landslide body, which belongs to the fields of geotechnical and foundation investigation, in particular to a creep monitoring device and a measuring method for the deep part of a landslide body.

Background technique

my country is a landslide-prone country. Landslide disasters often cause destructive disasters such as casualties, road burial, and house damage, which seriously threaten the life and property safety of the country and people. Therefore, accurate forecasting of landslide hazards is the key to solving the problem. The occurrence, development, and evolution of landslides are accompanied by changes in a large number of macroscopically measurable physical information, such as surface displacement, deep displacement, surface inclination, rock and soil mass pressure, acoustic emission, etc., and deep displacement can more intuitively reflect landslide mass. Therefore, the monitoring of deep displacement can greatly improve the accuracy of landslide prediction. At this stage, the methods for monitoring deep displacement include embedded instruments and non-embedded instruments, but the basic principles of these two instruments are similar, that is, they are both pre-drilled on the landslide body, and then embedded with a certain rigid pipe. , when the landslide push tube is deformed, the displacement of the landslide can be measured by measuring the deformation of the tube. However, when the displacement of the landslide is small, that is, the deep creep, the thrust of the landslide on the pipe is not enough to cause the pipe to deform. Therefore, the deformation data cannot be measured by conventional instruments at this time, but the weak deformation signal is very important for landslide prediction. , evolution and inversion are all crucial.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a displacement meter (a sensor dedicated to measuring displacement) that can be extended from the measuring device to the inside of the rock and soil mass to directly measure the deep creep of the landslide mass deformation. A monitoring device, which can measure the small displacement in the deep part of the landslide body most directly and reliably.

At the same time, the invention also provides a method for measuring the deep creep of the landslide body.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A deep creep monitoring device for a landslide body, including a sealing cover, a rubber plug, an O-ring, a circuit compartment, a casing, a motor seat, a stepping motor, a displacement meter, a limit plate, a base, a centering plate, a lower joint, a locking Nuts, turntables, sensor holders, screws, long-leg bolts, fixing bolts, circuit holders, upper connectors and cables;

The upper end of the upper joint is provided with an upper groove structure, and the upper groove is provided with a tapered hole of an internal thread, and the rubber plug is placed in the upper groove of the upper joint, and the cable passes through the upper joint, the rubber plug and The central hole of the sealing cover, the sealing cover is screwed into the tapered hole of the upper joint through thread fit, the sealing cover presses the rubber plug, and the rubber plug presses the cable; the lower end of the upper joint is provided with an external thread, The shell is screwed onto the lower end of the upper joint through an internal thread, and the O-ring is arranged between the shell and the lower end of the upper joint;

The lower end of the upper joint is provided with a lower groove structure, and the lower groove is provided with an internal thread, and the upper end of the circuit compartment is connected with the internal thread of the lower groove at the lower end of the upper joint through the external thread;

The lower end of the circuit compartment is provided with an internal thread, and the motor base is connected with the internal thread at the lower end of the circuit compartment through the external thread at the upper end;

The motor seat is a stepped shaft structure, with a through hole in the center, and threaded holes for connection at the upper and lower ends; the circuit seat is a cuboid at the upper end and a disc at the lower end, and the circuit seat is placed on the motor. Above the base, and connected with the motor base through fixing bolts;

The stepping motor is fixed on the lower end of the motor seat through long-leg bolts; the rotating shaft at the lower end of the stepping motor passes through the center hole of the limit plate and the rotating disc in turn, and the locking nut is screwed on the rotating shaft of the stepping motor;

The turntable and the sensor seat are provided with disc-shaped threads, and the sensor seat is connected with the turntable through the disc-shaped threads;

The limit plate is a plate-shaped structure, and the plate-mounted structure is provided with a strip-shaped through hole as a guide rail. The sensor seat is stuck in the guide rail. The number of guide rails and sensor seats is four, and the four guide rails are along the circumferential direction Evenly distributed;

A displacement meter is installed on each sensor seat, and the displacement meter is installed on the sensor seat by screws;

The upper end of the base is provided with an external thread, and the base is connected with the internal thread at the lower end of the limit plate through the external thread at the upper end;

The centralizing disc is a disc-shaped part with an external thread on the upper end, and the upper end of the centralizing disc is connected with the lower end of the base through the external thread; the lower end of the centralizing disc is embedded in the groove of the lower joint; the lower joint is connected to the housing through the external thread connected;

The upper joint is provided with a tapered external thread, and the lower joint is provided with a tapered internal thread.

A method for measuring the deep creep of a landslide, in which the above-mentioned deep creep monitoring device for a landslide is adopted, and the steps of the method are as follows:

(1) The drilling rig first drills holes on the rock and soil where landslide disasters may occur. After the drilling rig is completed, lift the drill pipe and connect the monitoring device to the drill pipe. The installation of the monitoring device can be controlled by controlling the number of drill pipes. Position; By installing multiple monitoring devices in different positions, the displacement at different depths can be collected respectively;

(2) Then start the drilling rig and ensure that the monitoring device does not rotate, and lower multiple monitoring devices to different designated depths;

(3) After installation, power the monitoring device through the cable, control the motor rotation of the monitoring device through the cable, extend the monitoring probe of the displacement meter and penetrate into the interior of the rock and soil, and then turn off the power to keep the monitoring probe deep into the interior of the rock and soil state;

(4) Open the data acquisition system inside the monitoring device through the cable, collect the data of the four displacement sensors on the device in turn, and the data collected are transmitted to the surface in real time through the cable and stored;

(5) The displacement data in each direction can be obtained through the data of the four displacement meters on each monitoring device, and the final displacement and its direction can be obtained by adding the displacement vector data obtained by the four displacement meters.

Compared with the prior art, the present invention has the following technical effects:

(1) Real-time measurement of the small displacement in the deep part of the landslide body can be carried out, and the main landslide direction and size of the landslide body can be obtained according to the measurement results.

(2) The direction and size of the main landslide at different formations of the landslide body can be measured in real time.

Description of drawings

Fig. 1 is the front view of a kind of landslide mass deep creep monitoring device;

Fig. 2 is the top view of a kind of landslide mass deep creep monitoring device;

Fig. 3 is a cross-sectional view along A-A direction in Fig. 1 .

In the attached drawings: 1—Sealing cover; 2—Rubber plug; 3—O-ring; 4—Electrical compartment; 5—Shell; 6—Motor base; 7—Stepping motor; ;10—base; 11—righting plate; 12—lower joint; 13—lock nut; 14—turntable; 15—sensor seat; 16—screw; 20—upper connector; 21—cable.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1, 2, and 3, a deep creep monitoring device for a landslide body includes a sealing cover 1, a rubber plug 2, an O-ring 3, a circuit compartment 4, a casing 5, a motor seat 6, a stepping motor 7, Displacement gauge 8, limit plate 9, base 10, centering plate 11, lower joint 12, lock nut 13, turntable 14, sensor seat 15, screw 16, long-leg bolt 17, fixing bolt 18, circuit seat 19, upper joint 20 and cable 21.

The upper end of the upper joint 20 is provided with an upper groove structure, and the upper groove is provided with a tapered hole of an internal thread. The rubber plug 2 is tapered, and the rubber plug 2 is put into the upper groove of the upper joint 20 . The cable 21 passes through the center hole of the upper joint 20, the rubber plug 2 and the sealing cover 1, and the sealing cover 1 is screwed into the tapered hole of the upper joint 20 through thread fit, the sealing cover 1 presses the rubber plug 2, and the rubber plug 2 presses Tighten the cable 21. In this embodiment, the sealing cover 1 is connected with the internal thread in the tapered hole of the groove of the upper joint 20 through an external thread. When the sealing cover 1 is tightened, the conical rubber plug 2 is squeezed, and the rubber plug 2. Press the cable 21 tightly to seal it after being radially deformed by the extrusion force. The lower end of the upper joint 20 is provided with an external thread, the housing 5 is screwed on the lower end of the upper joint 20 through the internal thread, and the O-ring 3 is arranged between the housing 5 and the lower end of the upper joint 20. In this embodiment, the O-shaped The ring 3 is placed on the root of the external thread of the upper joint 20, and the outer shell 5 is connected with the external thread of the upper joint 20 through the internal thread, and at the same time, the O-ring 3 is squeezed, thereby sealing.

The lower end of the upper joint 20 is provided with a lower groove structure, and the lower groove is provided with an internal thread, and the upper end of the circuit compartment 4 is connected with the internal thread of the lower groove at the lower end of the upper joint 20 by an external thread.

The lower end of the circuit compartment 4 is provided with an internal thread, and the motor seat 6 is connected with the internal thread at the lower end of the circuit compartment 4 through the external thread at its upper end.

The motor base 6 is a stepped shaft structure, with a through hole in the center, and threaded holes for connection at the upper and lower ends; the circuit base 19 is a cuboid at the upper end and a disc at the lower end, and the data processing circuit can be fixed by screws on the structure. The circuit base 19 is placed above the motor base 6 and connected with the motor base 6 through fixing bolts 18 .

The stepping motor 7 is fixed on the lower end of the motor base 6 by the long-footed bolt 17; the rotating shaft at the lower end of the stepping motor 7 passes through the center holes of the limit disc 9 and the rotating disk 14 successively, and the locking nut 13 is screwed on the stepping motor 7 on the rotating shaft and lock it.

The turntable 14 and the sensor seat 15 are provided with disc-shaped threads, and the sensor seat 15 is connected with the turntable 14 through the disc-shaped threads.

The limit plate 9 is a plate-shaped structure, and the plate-mounted structure is provided with a strip-shaped through hole as a guide rail. The sensor seat 15 is stuck in the guide rail. The number of the guide rail and the sensor seat 15 is four, and the four guide rails are uniform along the circumferential direction. Distribution, that is, two adjacent guide rails are distributed at 90 degrees.

A displacement meter 8 is installed on each sensor seat 15 , and the displacement meter 8 is installed on the sensor seat 15 through a screw 16 .

The upper end of the base 10 is provided with an external thread, and the base 10 is connected with the internal thread at the lower end of the limiting disc 9 through the external thread at the upper end.

The centralizing plate 11 is a disc-shaped part with an external thread on the upper end, and the upper end of the centralizing plate 11 is connected with the lower end of the base 10 through the external thread; the lower end of the centralizing plate 11 is embedded in the groove of the lower joint 12; Connected to shell 5.

The upper joint 20 is provided with a tapered external thread, and the lower joint 12 is provided with a tapered internal thread. The monitoring device is connected with the drill pipe through the tapered threads of the upper joint 20 and the lower joint 12 .

The four displacement meters 8 are installed on the monitoring device, and the four displacement meters 8 are evenly distributed in four directions of the circumference. Under normal circumstances, the four displacement meters 8 are all hidden inside the monitoring device. When the device needs to be used to measure the small deformation displacement of the deep part, the stepper motor 7 on the control device rotates forward, the stepper motor 7 drives the turntable 14 to rotate, and the turntable 14 drives the sensor seat 15 to move through the disc-shaped thread, and the sensor seat 15 is due to Guided by the guide rail on the limit plate 9, the sensor seat 15 will eventually move radially along the guide rail direction from the dot direction of the turntable 14, and the four displacement gauges 8 can be pushed out, so that the four displacement gauges 8 are inserted into the Inside the rock mass. When the rock-soil body has a weak displacement, although the deformation force is not enough to push the drill pipe to cause the drill pipe to be displaced, since the displacement meter 8 is inserted into the rock-soil body, it directly measures the deformation of the rock-soil body, so the small Deformation is measured. But when the deformation of the landslide body was large, the drill rod moved, and because the displacement meter 8 was installed on the drill rod and moved together with the drill rod, the displacement meter 8 could not measure the motion displacement of the drill rod. Therefore, the device is only used to measure the small displacement of the landslide body. When the stepper motor 7 reverses, the sensor seat 15 moves in the opposite direction. That is, when the stepping motor 7 rotates forward, the displacement gauge 8 will protrude outward in the radial direction. A through hole is processed on the shell 5 facing the probe of the displacement meter 8 to ensure that the probe of the displacement meter 8 protrudes. The device utilizes the rotation of the stepper motor 7 to extend the displacement gauge 8 to the rock-soil body, so the tiny displacement of the rock-soil body can be detected. The monitoring device is equipped with four displacement meters 8 along the circumferential direction, and the displacement data can be measured by the four displacement meters 8 during actual use, and the final displacement and its value can be obtained by adding the displacement vector data obtained by the four displacement meters 8. direction, the main landslide direction and displacement of the landslide body can be obtained. When multiple measuring devices are installed at different depths of the landslide body, the displacement and orientation of different depths can be measured, and the landslide movement conditions of different formations can be obtained. The monitoring device can extend the displacement meter 8 (a sensor specially used for measuring displacement) from the measuring device to the inside of the rock and soil mass to directly measure the deformation of the rock and soil mass, so it can be the most direct and reliable for small displacements in the deep part of the landslide mass. Measurement.

A method for measuring the deep creep of a landslide, in which the above-mentioned deep creep monitoring device for a landslide is adopted, and the steps of the method are as follows:

(1) The drilling rig first drills holes on the rock and soil where landslide disasters may occur. After the drilling rig is completed, lift the drill pipe and connect the monitoring device to the drill pipe. The installation of the monitoring device can be controlled by controlling the number of drill pipes. Position; By installing multiple monitoring devices at different positions, the displacement at different depths can be collected respectively.

(2) Then start the drilling rig and ensure that the monitoring device does not rotate, and lower multiple monitoring devices to different designated depths.

(3) After the installation is completed, power is supplied to the monitoring device through the cable, and the motor of the monitoring device is controlled to rotate through the cable, and the monitoring probe of the displacement meter 8 is stretched out and penetrated into the rock and soil, and then the power is turned off, so that the monitoring probe remains deep into the rock and soil internal state.

(4) Open the data acquisition system inside the monitoring device through the cable, and collect the data of the four displacement sensors on the device in sequence, and the collected data is transmitted to the surface in real time through the cable and stored.

(5) The displacement data in each direction can be obtained from the data of the four displacement meters on each monitoring device, and the final displacement and its direction can be obtained by adding the displacement vector data obtained by the four displacement meters, which can be obtained The main landslide direction and displacement of the landslide body.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (2)

1. a kind of slip mass deep creep monitoring device, it is characterised in that：Including closure (1), rubber stopper (2), O-ring (3), Circuit cabin (4), shell (5), motor cabinet (6), stepper motor (7), displacement meter (8), position-arresting disk (9), base (10), righting disc (11), lower contact (12), locking nut (13), rotating disk (14), sensor holder (15), screw (16), long foot bolt (17), fixation Bolt (18), circuit seat (19), top connection (20) and cable (21)；

Top connection (20) upper end is provided with fovea superior slot structure, and female bellmouth, the rubber stopper (2) are set in upper groove It is put into the upper groove of top connection (20), the cable (21) is through in top connection (20), rubber stopper (2) and closure (1) Heart hole, the closure (1) is screwed in the bellmouth of top connection (20) by screw thread cooperation, and closure (1) compresses rubber stopper (2), the rubber stopper (2) compresses cable (21)；The lower end of the top connection (20) is provided with external screw thread, and the shell (5) passes through Internal thread rotation is enclosed within the lower end of top connection (20), the O-ring (3) be arranged on shell (5) and top connection (20) lower end it Between；

The lower end of the top connection (20) is provided with recessed slot structure, and internal thread is provided with low groove, and the upper end of circuit cabin (4) passes through External screw thread is connected with the internal thread of the low groove of top connection (20) lower end；

The lower end of the circuit cabin (4) is provided with internal thread, and motor cabinet (6) is by the external screw thread of its upper end and circuit cabin (4) lower end Internal thread be connected；

The motor cabinet (6) is a multidiameter structure, and the center of motor cabinet (6) is provided with through hole, and the upper and lower end of motor cabinet (6) is equal It is provided with the screwed hole of connection；The circuit seat (19) for a upper end be cuboid, lower end for disk structure, circuit seat (19) Motor cabinet (6) top is positioned over, and is connected with motor cabinet (6) by fixing bolt (18)；

The stepper motor (7) is fixed on the lower end of motor cabinet (6) by long foot bolt (17)；Stepper motor (7) lower end turn Moving axis sequentially passes through the centre bore of position-arresting disk (9) and rotating disk (14), and locking nut (13) is tightened on the rotary shaft of stepper motor (7) On；

The rotating disk (14) and sensor holder (15) are provided with plate-like screw thread, and sensor holder (15) by plate-like screw thread and rotating disk (14) it is connected；

The position-arresting disk (9) is a disk-like structure, and disk assembling structure is provided with strip through hole as guide rail, the sensor holder (15) It is stuck in guide rail, the number of guide rail and sensor holder (15) is four, and four guide rails are distributed uniformly and circumferentially；

A displacement meter (8) is mounted on each sensor holder (15), the displacement meter (8) is installed on biography by screw (16) On sensor seat (15)；

The upper end of the base (10) is provided with external screw thread, and base (10) is by the external screw thread of its upper end and position-arresting disk (9) lower end Internal thread is connected；

The righting disc (11) is provided with externally threaded discoid part for a upper end, and righting disc (11) upper end is by external screw thread and base (10) lower end is connected；The lower end of righting disc (11) is embedded into the groove of lower contact (12)；The lower contact (12) is by outer Screw thread is connected with shell (5)；

The top connection (20) is provided with conical external screw thread, and the lower contact (12) is provided with conical internal thread.

2. a kind of slip mass deep creep measuring method, it is characterised in that employ the cunning described in claim 1 in the method The step of slopes deep creep monitoring device, the method, is as follows：

(1) rig first drills on the Rock And Soil that may have landslide disaster to occur, and after the completion of drill hole of drilling machine, drilling rod is lifted, will Monitoring device is connected with drilling rod, by controlling the controllable monitoring device installation site of drilling rod radical；By in different positions Installing multiple monitoring devices can respectively gather displacement at different depth；

(2) subsequent start-up rig and ensure that monitoring device is not rotated, multiple monitoring devices are transferred into different designated depths；

(3) powered to monitoring device by cable after installing, rotated by cable line traffic control monitoring device motor, by position The monitoring probe for moving meter (8) stretches out and gos deep into inside ground, being then turned off power supply so that monitoring probe is remained and goed deep into ground Portion's state；

(4) data collecting system inside monitoring device is opened by cable, four displacement sensings on the device is gathered successively The data of device, the data Jing cable for collecting is real-time transmitted to earth's surface and is stored；

(5) displacement data in each direction is obtained by the data of four displacement meters in each monitoring device, by four positions The displacement vector data addition that meter is obtained is moved, final mean annual increment movement and its direction is just obtained.