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Method and system for SA-based ground fissure monitoring

A ground fissure and coordinate system technology, applied in the field of slowly changing geological disaster monitoring, can solve the problems of low monitoring accuracy and limited measurement range

Inactive Publication Date: 2018-12-21
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE +1
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Problems solved by technology

[0004] In order to overcome the problems of low monitoring accuracy and limited measurement range in the ground fissure monitoring technology in the prior art, the present invention provides a method and system for SAA monitoring ground fissures

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  • Method and system for SA-based ground fissure monitoring
  • Method and system for SA-based ground fissure monitoring
  • Method and system for SA-based ground fissure monitoring

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] It should be noted that the array displacement sensor (Shape Accel Array, SAA) is a new type of monitoring instrument, which is composed of a three-axis micro-electro-mechanical system (MEMS) accelerometer. It adopts micro-electromechanical induction method and array calculation principle to obtain continuous deformation curve in real time.

[0039] Every 8 segments of the SAA form a basic unit (octet or sub-array). Each basic unit consists of 1 cable, 7 joints and 8 sensor segments, each sensor segment is equipped with an accelerometer and a microprocessor, and the fourth segment also adds a temperature sensor. The standard length of the sensor segment is 305mm a...

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Abstract

The invention provides a method and system for SA-based ground fissure monitoring. The method comprises: a first array displacement sensor is buried in a direction parallel to a ground surface and a second array displacement sensor is buried in a direction perpendicular to the ground surface, and the first array displacement sensor and the second array displacement sensor penetrate an upper disc and a lower disc of a to-be-monitored ground fissure respectively; a three-dimensional coordinate system is established, wherein the X axis of the three-dimensional coordinate system is parallel to theextending direction of the to-be-monitored ground fissure, the Y axis of the three-dimensional coordinate system is perpendicular to the extending direction of the to-be-monitored ground fissure, andthe Z axis of the three-dimensional coordinate system is perpendicular to the ground surface; and statistics of average displacement amounts of nodes in the first array displacement sensor and the second array displacement sensor in an X-axis direction, a Y-axis direction, and a Z-axis direction is carried out within a preset monitoring period and thus a first statistical result is obtained, anda periodic variation law of the to-be-monitored ground fissure is determined based on the first statistical result. Therefore, the measurement range can be expanded to a certain extent and the accuracy of the ground fissure monitoring result is improved.

Description

technical field [0001] The invention relates to the technical field of slow-variation geological disaster monitoring, and more specifically, to a method and system for SAA monitoring ground fissures. Background technique [0002] Ground fissures are geological phenomena in which surface rocks and soils crack under the action of natural or man-made factors and form cracks on the ground. The fracture direction is consistent with the underground fault zone, and the scale is large and often distributed in bands. This kind of ground deformation disaster has the characteristics of strong concealment and great harm. It causes direct damage to various engineering constructions such as linear engineering, water conservancy facilities, and urban buildings. At the same time, it seriously restricts urban planning, effective use of land, and groundwater Mining and utilization and urban underground space development and utilization. [0003] Due to the particularity of ground fissures an...

Claims

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Application Information

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IPC IPC(8): G01B21/02
CPCG01B21/02
Inventor 马静刘祥磊苏珊
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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