TECHNICAL FIELD

The present disclosure relates to the technical field of geological disaster monitoring and prevention, and particularly relates to an arrangement apparatus for multiple integrated sensors in a deep position of a sliding mass and an arrangement method.

BACKGROUND

As a common geological disaster, landslide most frequently and widely occurs in nature, seriously threatening our living environments, natural resources, water conservancy projects, etc. It is reported that since the initial impoundment of the Three Gorges Reservoir in 2003, a large number of ancient landslides re-slide owing to periodic water level fluctuation of the Reservoir and rainfall, which has great potential danger. The deformation of landslide is evolved dynamically and spatiotemporally, basic landslide features are closely correlated and matched with evolution stages and evolution models, and the evolution process is usually accompanied with multi-field coupling features.

Single-hole multi-sensor integrated arrangement has become an important aspect in continuous development of the technology for monitoring landslide multi-field information in recent years. In view of the defects of low efficiency, high cost, poor correlation, etc. in an existing multi-instrument independent distribution type integrated monitoring method, a concept of “multi-measurement in one hole” has been gradually proposed in recent years and considered promising by the engineering geologists. Although the “multi-measurement in one hole” is generally considered promising and has developed substantially, it still has technical defects. For example, a monitoring instrument is installed in a hole in an existing monitoring method, which is suitable for deep inclination measurement and underground water level measurement, but cannot accurately measure parameters of pore water pressure and water content etc. in situ. Moreover, the method has poor environmental adaptability, and when the landslide deformation is increased, the instrument in the hole is prone to damage and malfunction, so a multi-information parameter monitoring technology of “multi-measurement in one hole” is not workable under the in-situ condition. Meanwhile, under the condition that soil on the side wall of the borehole is compact and part of sliding mass is made of gravel soil or more compact materials, arrangement of the multi-parameter sensor in the borehole is often challenging. Therefore, it is important to develop the multi-information parameter monitoring technology capable of achieving “multi-measurement in one hole” in situ and a corresponding arrangement device for an underground multi-parameter monitoring sensor.

SUMMARY

In order to solve the problem, the embodiments of the present disclosure provide an arrangement apparatus for multiple integrated sensors in a deep position of a sliding mass and an arrangement method.

The embodiments of the present disclosure provides an arrangement apparatus for multiple integrated sensors in a deep position of a sliding mass, the apparatus including:

a penetration-type monitor including a casing pipe and sensor penetration scissors, where the casing pipe extends in a vertical direction and is configured to be lowered into a borehole, a mounting hole extending in the vertical direction penetrates through a side wall of the casing pipe, and vertical grooves extending in the vertical direction are provided in opposite side walls of the mounting hole;

the sensor penetration scissors are used for obtaining monitoring data of a sliding mass, is arranged in a shear shape and includes a first blade and a second blade which are connected by means of a pin, the first blade and the second blade rotating close to each other or away from each other in the vertical direction so as to define an initial position and a monitoring position of the sensor penetration scissors, outer ends of the first blade and the second blade being shearing portions, inner ends thereof being pressed portions, and ends of the pressed portions being located in the casing pipe; and sliders are arranged at positions, opposite the vertical grooves, of the pressed portions, and the sliders slide up and down in the vertical grooves;

when the sensor penetration scissors are located at the initial position, the ends of the pressed portions of the first blade and the second blade may be arranged at an interval one above the other; and when the sensor penetration scissors are located at the monitoring position, the pressed portions move close to each other, and the shearing portions penetrate out of the mounting hole to shear the sliding mass; and

a monitor arrangement system driving the sensor penetration scissors to move from the initial position to the monitoring position.

Further, the monitor arrangement system may include a traction mechanism and an arrangement probe which may be placed into the casing pipe, the arrangement probe having a vertical movement stroke, and the traction mechanism being connected to the arrangement probe so as to pull the arrangement probe to move in the vertical direction;

the arrangement probe may include a housing, two abutting portions, two first driving mechanisms and a second driving mechanism; where each abutting portion may be movably mounted on the corresponding first driving mechanism, and the two abutting portions may be provided with avoiding positions located on an inner side of the pressed portion and pressing positions located on an upper side and a lower side of the pressed portion separately; the first driving mechanisms may be movably mounted on the housing in the vertical direction and drive the abutting portions to be switched between the avoiding positions and the pressing positions separately; and the second driving mechanism may be fixed to the housing and drives the first driving mechanisms to move close to each other in the vertical direction to drive the two pressed portions to rotate close to each other, so as to move the sensor penetration scissors from the initial position to the monitoring position.

Further, the arrangement probe may further include two connection rod assemblies; the housing may be hollow, an elongated hole extending in the vertical direction may penetrate a side wall of the housing, and the two second driving mechanisms may be arranged in the housing at an interval one above the other; the connection rod assemblies may correspond to the second driving mechanisms in a one-to-one manner, be located between the two second driving mechanisms and include force bearing boxes, first hinge support seats, hinge rods and Y-shaped hinge rods;

the force bearing boxes may be fixed to the second driving mechanisms, the two first hinge support seats may be located between the two force bearing boxes, and the second driving mechanisms may be connected to the first hinge support seats by means of the first driving mechanisms; and the Y-shaped hinge rod may include a first hinge rod and a protruding rod formed by protruding outwards from a middle of the first hinge rod, one end of the first hinge rod being hinged to the first hinge support seat, and the other end thereof being hinged to the force bearing box by means of the hinge rod; and the first driving mechanism may drive the first hinge support seat to move up and down to drive the Y-shaped hinge rod to rotate to penetrate out of the elongated hole, so as to form the abutting portion, having the avoiding position located on the inner side of the pressed portion and the pressing positions located on the upper side and the lower side of the pressed portion separately, at an end of the protruding rod.

Further, the arrangement probe may further include a jacking mechanism fixed in the housing and having an output shaft extending in a radial direction of the housing, where the output shaft may be opposite the pin, and the jacking mechanism may drive the output shaft to move in the radial direction of the housing, so as to push the pin to move towards the sliding mass.

Further, the force bearing box may be hollow, and a through hole may penetrate one side, facing the hinge rod, of the force bearing box; the connection rod assembly may further include a reset spring and a movable rod, one end of the movable rod being fixedly connected to the first hinge support seat, the other end thereof penetrating the through hole to be located in the force bearing box, the reset spring sleeving the movable rod, and an upper end and a lower end of the reset spring abutting against the first hinge support seat and the force bearing box respectively; and the first driving mechanism may be mounted in the force bearing box and drive the movable rod to move up and down.

Further, the first driving mechanism may include a driving electric motor and a metallic line, one end of the metallic line being wound around a rotation shaft of the driving electric motor, and the other end thereof being connected to one end, located in the force bearing box, of the movable rod.

Further, a middle of the vertical groove may protrude towards the sliding mass to form a horizontal groove, the horizontal groove may extend in the radial direction of the casing pipe, and the pin may be located in the horizontal groove.

Further, the casing pipes may include a plurality of first casing pipes and a plurality of second casing pipes, the first casing pipes and the second casing pipes being connected alternatively in sequence, and each of the first casing pipes being provided with the mounting hole.

Further, the arrangement apparatus for multiple integrated sensors in a deep position of a sliding mass may further include a monitoring apparatus, where the monitoring apparatus may include a data acquisition unit in wireless communication with the sensor penetration scissors for lowering same into the casing pipe to receive the monitoring data.

The embodiments of the present disclosure further provides an arrangement method, using the above arrangement apparatus for multiple integrated sensors in a deep position of a sliding mass and including the following steps:

S1, lowering an arrangement probe to a position, corresponding to sensor penetration scissors, in a casing pipe by means of a traction mechanism, then driving, by a first driving mechanism, an abutting portion to be switched between an avoiding position and a pressing position, driving, by a second driving mechanism, the first driving mechanisms to move close to each other in the vertical direction to drive the two pressed portions to rotate close to each other, so as to move the sensor penetration scissors from an initial position to a monitoring position, and then making the sensor penetration scissors cut into a sliding mass outside a borehole; and

S2, performing pressing and shearing action, and then operating S1reversely after pressing and shearing action is completed, to restore the arrangement probe to an original position.

The technical solution provided by the embodiments of the present disclosure has the beneficial effects that the shear-shaped sensor penetration scissors are mounted on the casing pipe, and the shearing portion cuts into a soil body with stress balanced, so the requirement on the casing pipe is low. Compared with the prior art, the application scene is expanded, the present disclosure is more adaptive to a working condition with higher compactness of the sliding mass, and the related sensors may be better arranged. The arrangement apparatus is designed to apply static force locally, so the arrangement apparatus is not prone to overturn with static force balanced and avoids winding with a low requirement for a pull rope. Disturbance of a monitoring environment is reduced in a static cut-in mode. Moreover, an arrangement range outside the hole is enlarged, which may be better close to an original underground environment, and measures more accurate underground multi-field information of the landslide. By means of arrangement of sensors outside a side wall of the borehole, and wireless transmission and wireless energization of the arrangement probe outside the hole and the monitoring apparatus, multi-parameter information monitoring of rock and soil bodies outside the borehole of the deep position of a sliding mass may be achieved, and a monitoring result is closer to the real underground environment.

