CN206862331U - Geology internal displacement three-dimension monitor system - Google Patents

Abstract

The utility model discloses a three-dimensional monitoring system for geological internal displacement, which comprises a three-dimensional positive and negative two-way inertial sensing detection system placed underground and an information collection system placed on the ground; the three-dimensional positive and negative two-way inertial sensing detection system passes cables and information The acquisition system is connected; the three-dimensional positive and negative two-way inertial sensing detection system includes a number of MEMS sensors connected end to end and placed in the PVC straight pipe along the axis of the PVC straight pipe. The PVC straight pipe is placed in the drill hole, and the drill hole and the PVC straight pipe are filled with cement. grout and the cement grout has set. The MEMS sensor includes a pair of inertial sensors arranged on the X, Y, and Z axes respectively. The utility model solves the problem that the abnormality of individual monitoring points in the existing fixed inclinometer system causes the distortion of monitoring results, and ensures that the monitoring results are closer to the actual geological deformation.

Description

Three-dimensional monitoring system for geological internal displacement

technical field

The utility model relates to a three-dimensional monitoring system for geological internal displacement, which belongs to the field of geological deformation monitoring of geotechnical engineering.

Background technique

The deformation monitoring of geotechnical engineering includes surface displacement observation and internal displacement observation. Deformation monitoring is mainly to observe the horizontal displacement and vertical displacement, grasp the change law, and study the trend of cracks, landslides, sliding and overturning. Commonly used internal displacement observation instruments include displacement gauges, seam gauges, inclinometers, settlement gauges, fixed inclinometers, vertical line coordinate instruments, tension gauges, multi-point displacement gauges, and strain gauges. Surface displacement observation instruments include level, total station, GPS, 3D laser scanning technology, etc.

With the rapid development of science and technology, safety monitoring technology is constantly improving and improving in the fields of water conservancy and hydropower, highways, railways, and civil aviation. At this stage, single-point (settlement plates, settlement rings) and distributed (Fixed inclinometer, settlement instrument) for settlement monitoring.

At present, the application of MEMS-related deformation instruments, such as fixed inclinometers, for deformation monitoring has become a development trend in this field, but at this stage it is only used in geotechnical engineering slopes. Referring to FIGS. 1 and 2 , generally, several fixed inclinometers 91 equipped with MEMS (micro-electromechanical systems) inertial sensors 92 are connected by rigid connecting rods 93 . During measurement, fixed inclinometers 91 connected end to end are placed inside the geology to be measured, as shown in FIG. 2 , and MEMS inertial sensors 92 on each fixed inclinometer 91 serve as a monitoring point. When observing the internal geological deformation, the MEMS inertial sensor 92 at the beginning or end is used as the starting point, and the absolute deformation of each monitoring point can be calculated by obtaining the absolute two-dimensional deformation value of the monitoring point at the beginning or end, so that Carry out cumulative calculation of deformation, and the final calculated settlement result is the relative two-dimensional deformation value relative to the monitoring point at the beginning or end.

It can be seen from the actual implementation that the geological internal deformation observation method implemented by the above-mentioned fixed inclinometer system has the following defects: First, affected by the geological interface (fault, broken zone), the deformation obtained by individual fixed inclinometer monitoring points The amount and deformation trend are quite different from the actual geological deformation. As shown in FIG. 2 , reference numeral 102 shows the actual geological interface, and there is a large difference between the deformation trend line 101 obtained by each fixed inclinometer 91 and the actual geological deformation. Second, the above-mentioned fixed inclinometer system can only realize two-dimensional deformation observation, the measurement accuracy is low, and there are systematic errors, and the error value will continue to accumulate with the deformation accumulation calculation process, resulting in distortion of the final result.

Utility model content

The purpose of this utility model is to provide a three-dimensional monitoring system for geological internal displacement. This three-dimensional monitoring system solves the problem that the monitoring results are distorted due to the abnormality of individual monitoring points in the existing fixed inclinometer system, and ensures that the monitoring results are closer to the actual geology. Deformation situation.

In order to achieve the above object, the utility model adopts the following technical solutions:

A three-dimensional monitoring system for geological internal displacement, characterized in that it includes a three-dimensional positive and negative two-way inertial sensing system placed underground and an information collection system placed on the ground; the three-dimensional positive and negative two-way inertial sensor detection system communicates with the information The acquisition system is connected; the three-dimensional positive and negative two-way inertial sensing detection system includes a number of MEMS sensors connected end to end and placed in the PVC straight pipe along the axis of the PVC straight pipe. The PVC straight pipe is placed in the drill hole, and the drill hole and the PVC straight pipe are filled with cement. The slurry and the cement slurry have been solidified, wherein: the MEMS sensor includes a pair of inertial sensors arranged in the forward and reverse directions on the X, Y, and Z axes respectively; the axis of the PVC straight pipe is defined as the Z axis, and the plane perpendicular to the Z axis is defined as The X-axis and Y-axis are perpendicular to each other.

The MEMS sensor includes a signal processing controller connected to all the inertial sensors.

The information collection system includes a signal collection module, a power supply module and a transceiver antenna, wherein: the signal collection module is used to connect with the cable protruding from the geological surface of the three-dimensional positive and negative two-way inertial sensing detection system, and the power supply module, the transceiver antenna and the signal The acquisition module is connected, and the power supply module provides power.

An information management system capable of wireless communication with the information collection system is provided on the ground.

The information management system includes a communication module, a deformation analysis module and a data storage module.

The utility model has the advantages of:

The utility model realizes comprehensive monitoring of geological internal deformation trend from a three-dimensional perspective, has high measurement accuracy and small error, and can effectively prevent the occurrence of abnormal phenomena of sudden increase or steep drop of individual monitoring points caused by geological interface factors. It truly, intuitively and accurately reflects the actual deformation inside the geology, thus providing scientific basis and reliable technical support for checking design and construction guidance.

The three-dimensional monitoring system of the utility model can be continuously and distributedly applied to geological internal deformation monitoring occasions of dams, side slopes, caverns, wide roadbeds, station foundations and the like.

Description of drawings

Figure 1 is a schematic diagram of the installation of an existing fixed inclinometer system.

Fig. 2 is an explanatory diagram of the use of the existing fixed inclinometer system.

Fig. 3 is a schematic diagram of a preferred embodiment of the three-dimensional monitoring system for geological internal displacement of the utility model.

Fig. 4 is a diagram illustrating the implementation of the three-dimensional geological internal displacement monitoring system of the present invention.

detailed description

As shown in Fig. 3, the geological internal displacement three-dimensional monitoring system of the utility model includes a three-dimensional positive and negative two-way inertial sensing detection system placed underground (i.e. inside the geology) and an information collection system 30 placed on the ground; The sensing detection system is connected to the information collection system 30 through cables; the three-dimensional positive and negative bidirectional inertial sensing detection system includes a number of MEMS sensors 10 connected end-to-end through signal lines and placed in the PVC straight pipe 20 along the axis of the PVC straight pipe 20, that is, end-to-end connection The straight line formed by each MEMS sensor 10 (as a monitoring point) is coaxial with the axis of the PVC straight pipe 20, and the PVC straight pipe 20 is placed in the borehole 50 drilled on the geological structure to be monitored, and the borehole 50 and the PVC straight pipe The tube 20 is filled with cement slurry and the cement slurry has solidified, wherein: the MEMS sensor 10 includes a pair of inertial sensors arranged in the forward and reverse directions on the X, Y, and Z axes respectively, that is to say, on the X axis, towards the X axis A pair of inertial sensors 12 and 13 with opposite detection directions are provided in the positive and negative directions. On the Y axis, a pair of inertial sensors 14 and 15 with opposite detection directions are provided toward the positive and negative directions of the Y axis. Also on the Z axis, A pair of inertial sensors 16 and 17 with opposite detection directions are also arranged facing the positive and negative directions of the Z axis. In each pair of inertial sensors, one measures towards the positive axis (X, Y or Z axis) and the other measures towards the negative direction of the same axis (X, Y or Z axis).

In the present utility model, the axis (central axis) of the PVC straight pipe 20 is defined as the Z axis, and a mutually perpendicular X axis and Y axis are defined in a plane perpendicular to the Z axis, and the X, Y, and Z axes together form a three-dimensional Coordinate System.

In the present invention, the axis of the PVC straight pipe 20 can be perpendicular to the geological surface 40 , can also be inclined to the geological surface 40 , and can even be parallel to the geological surface 40 .

The main function of the PVC straight pipe 20 is: first, it is easy for each MEMS sensor 10 to be lowered into the PVC straight pipe 20 in sequence and at the same time keep all the MEMS sensors 10 showing a straight line state as a whole; Great protection.

In actual production, the PVC straight pipe 20 can be spliced by several PVC short pipes, and it is also possible to use other materials without limitation.

In the utility model, under the premise that the inertial sensors are not disturbed, the installation positions of the three pairs of inertial sensors arranged on the X, Y, and Z axes on the MEMS sensor 10 can be flexibly designed without any interference. limited. Fig. 3 shows the situation that the inertial sensors for measuring towards the positive directions of X, Y and Z axes are installed on the top of the MEMS sensor 10 and the inertial sensors for measuring respectively towards the negative directions of the X, Y and Z axes are installed at the bottom of the MEMS sensor 10 .

In actual design, the MEMS sensor 10 includes a signal processing controller 11 , and the signal ports of the inertial sensors 12 - 17 are respectively connected to corresponding signal ports of the signal processing controller 11 .

In actual design, the information collection system 30 may include a signal collection module 33 (also referred to as a micro-electromechanical collection module), a power supply module 32, and a transceiver antenna 31, wherein: the signal collection module 33 is used for three-dimensional positive and negative two-way inertial sensing The detection system extends out of the cable connection of the geological surface 40, and the signal ports of the power module 32 and the transceiver antenna 31 are respectively connected with the corresponding signal ports of the signal acquisition module 33, and the power module 32 provides power.

Specifically, in the three-dimensional positive and negative two-way inertial sensing and detection system, the MEMS sensors 10 are connected through cables drawn from the signal processing controller 11, and the signal processing controller of the MEMS sensor 10 closest to the geological surface 40 11 The cable extending out of the geological surface 40 is connected to the corresponding signal port of the signal acquisition module 33 of the information acquisition system 30 .

As shown in FIG. 3 , an information management system 70 capable of wireless communication with the information collection system 30 is also provided on the ground.

Further, the information management system 70 may include a communication module 71, a deformation analysis module 72, and a data storage module 73, wherein: the signal ports of the communication module 71 and the data storage module 73 are respectively connected to the corresponding signal ports of the deformation analysis module 72, and the communication The module 71 is used for wireless communication with the transceiver antenna 31 of the information collection system 30 .

In actual design, the information management system 70 may further include an information editing module 74 , a chart display and query module 75 , and a printing module 76 . The configuration of the information management system 70 can be varied and not limited.

The installation and embedding method of the geological internal displacement three-dimensional monitoring system of the utility model comprises the following steps:

1) According to the number of MEMS sensors 10 required for actual monitoring, each MEMS sensor 10 is assembled through the end-to-end connection of signal lines;

2) On the geological structure to be monitored, drill a hole with a drilling rig. The hole diameter should be just enough to accommodate the PVC straight pipe 20. Usually, the PVC straight pipe 20 and the drill hole 50 are coaxially designed, and then the hole wall is cleaned;

3) Lower the PVC straight pipe 20 into the borehole 50;

4) Put a string of MEMS sensors 10 connected end to end into the PVC straight pipe 20 in sequence. The diameter of the PVC straight pipe 20 should be just enough to accommodate the MEMS sensors 10, so as to ensure that all MEMS sensors 10 form a line with the PVC straight pipe 20. straight lines with coaxial axes;

5) pouring cement slurry into the drill hole 50 and the PVC straight pipe 20 through the grouting equipment until the cement slurry is filled and overflows;

6) After the cement slurry solidifies (usually takes a week), install the information collection system 30 on the ground;

7) Make a concrete protection box by means of a concrete template, the size of the protection box is slightly larger than the size of the information collection system 30, so as to facilitate the connection of cables such as signal lines and power lines, and the MEMS sensor 10 closest to the geological surface 40 is extended to the The cables on the ground are connected to the information collection system 30 .

During the actual construction, the information management system 70 is installed on the ground, and then each system is debugged, the joint debugging between each system is carried out, and the initial monitoring data is set for subsequent monitoring.

When using the monitoring system of the utility model for monitoring, turn on the power supply of each system to ensure normal power supply.

The monitoring frequency of the three-dimensional positive and negative two-way inertial sensing detection system is set through the information management system 70, and then the work can start.

The three-dimensional positive and negative two-way inertial sensing detection system detects the X, Y, and Z three-axis deformation at each collection time according to the set monitoring frequency, and then each MEMS sensor 10 transmits the detected data to the information collection system 30, Then the information collection system 30 transmits it to the information management system 70 via the transceiver antenna 31, and finally the information management system 70 calculates the actual geological deformation at each collection moment and the set time period in the geological interior here, and synchronizes Data such as deformation trend curves are displayed.

In actual analysis, the monitoring system of the utility model can also be equipped with secondary instruments to compare the data collected by the system with the data read manually.

The geological internal displacement measurement method implemented by the geological internal displacement three-dimensional monitoring system of the utility model includes the following steps:

1) Each MEMS sensor 10 is used as a monitoring point. Based on the positive and negative trend function method, each monitoring point obtains the X, Y, and Z-axis deformation;

2) Taking the monitoring point closest to the geological surface 40 or the monitoring point farthest from the geological surface 40 as the starting point, start to collect the X, Y, and Z-axis deformations of each monitoring point one by one, and then accumulate and calculate for all monitoring points and Fit the X, Y, and Z axis deformation curves reflecting the position of the three-dimensional positive and negative two-way inertial sensing detection system;

3) According to the deformation curves of the X, Y, and Z axes, the relative deformation shape of the geological interior reflecting the position of the three-dimensional positive and negative two-way inertial sensing detection system is accumulated and calculated in the three-dimensional coordinate system, so as to truly reflect the geological conditions here. A case where internal displacement occurs.

As shown in Figure 4, the X-axis deformation curve 81, Y-axis deformation curve 82, and Z-axis deformation curve 83 calculated and fitted are shown in the figure. According to requirements, these three curves are integrated into a three-dimensional three-dimensional coordinate system The deformation form can make an intuitive, true and comprehensive three-dimensional display of the geological internal displacement of the monitoring site.

The utility model has the advantages of:

The utility model realizes comprehensive monitoring of geological internal deformation trend from a three-dimensional perspective, has high measurement accuracy and small error, and can effectively prevent the occurrence of abnormal phenomena of sudden increase or steep drop of individual monitoring points caused by geological interface factors. It truly, intuitively and accurately reflects the actual deformation inside the geology, thus providing scientific basis and reliable technical support for checking design and construction guidance.

The above are the preferred embodiments of the utility model and the technical principles used therefor. For those skilled in the art, without departing from the spirit and scope of the utility model, any technical solution based on the utility model Obvious changes such as equivalent transformations and simple replacements above all fall within the protection scope of the present utility model.

Claims (5)

1. A kind of 1. geology internal displacement three-dimension monitor system, it is characterised in that：It includes being placed in the three-dimensional positive and negative two-way used of underground Property sensing and detecting system and be placed in the information acquisition system of ground；Three-dimensional positive and negative two direction inertia sensing and detecting system by cable with Information acquisition system is connected；Three-dimensional positive and negative two direction inertia sensing and detecting system includes joining end to end, being placed in along PVC straight tube axis Some MEMS sensors in PVC straight tubes, PVC straight tubes are placed in drilling, and cement grout and water are perfused with drilling and PVC straight tubes Slurry liquid has solidified, wherein：MEMS sensor includes a pair of inertial sensors of the positive and negative two-way setting in X, Y, Z axis respectively； The axis of PVC straight tubes is defined as Z axis, and being defined in the plane vertical with Z axis has mutually perpendicular X-axis and Y-axis.
2. 2. geology internal displacement three-dimension monitor system as claimed in claim 1, it is characterised in that：

   The MEMS sensor includes signal processing controller, and signal processing controller is connected with all inertial sensors.
3. 3. geology internal displacement three-dimension monitor system as claimed in claim 1, it is characterised in that：

   Described information acquisition system includes signal acquisition module, power module and dual-mode antenna, wherein：Signal acquisition module is used for Positive and negative with three-dimensional two direction inertia sensing and detecting system stretches out the cable connection of geological surface, power module, dual-mode antenna with Signal acquisition module connects, and power module provides electric power.
4. 4. the geology internal displacement three-dimension monitor system as described in claim 1 or 2 or 3, it is characterised in that：

   Being provided with the ground can be with the information management system of described information acquisition system wireless telecommunications.
5. 5. geology internal displacement three-dimension monitor system as claimed in claim 4, it is characterised in that：

   Described information management system includes communication module, deformation analysis module, data memory module.