System and method for monitoring displacement of deep part of landslide

Abstract

The invention relates to a system and a method for monitoring the displacement of the deep part of landslide. The system comprises a base, wherein a measuring device is installed on the base, at least one displacement sensor is arranged in the measuring device, one end of each pull wire passes through the base to be connected with the displacement sensor, and the other end of each pull wire is fixedly connected with the anchor heads which are embedded in a slide bed part. Drill holes are dug in a landslide body, and the anchor heads are put in the drill holes. When a plurality of pull wires are used, the anchor heads are separately arranged in different depths, brittle casings are arranged in the anchor heads, cement mortar is cast between the drill holes and the brittle casings, the measuring device is fixedly installed, and through the steps, monitoring the multipoint displacement of the deep part of a large-deformation landslide is achieved. Through adopting the structure, the system and the method have the advantages that the large displacement of the deep part of the landslide can be measured, according to the concrete depth of the landslide body, the anchor heads of a plurality of pull wires are arranged in different depths, and the lengths of the drawn pull wires drawn are different, so that the displacement signals of the landslide body in different depths can be obtained.

Description

technical field [0001] The invention relates to the field of landslide monitoring, in particular to a landslide deep displacement monitoring system and a monitoring method using the system. Background technique [0002] The deep displacement monitoring of landslide has always been the foundation and basis of landslide prevention and control. The deep displacement monitoring of the landslide can not only provide accurate and reliable important information such as the displacement of the sliding body, the sliding surface and the location of the sliding bed, but also help to grasp the state of the landslide continuously for a long time, and realize the purpose of landslide stability evaluation, prediction and early warning. [0003] At present, deep displacement monitoring instruments can be mainly divided into mobile borehole inclinometers and fixed borehole inclinometers. [0004] The mobile borehole inclinometer can measure the horizontal displacement of each section of the...

AI Technical Summary

Problems solved by technology

[0004] The mobile borehole inclinometer can measure the horizontal displacement of each section of the whole hole, but the mobile borehole inclinometer has a small range. Once the landslide body has a large displacement, the inclinometer pipe will bend, and the inclination angle will change, which will easily lead to inclination. The instrument cannot enter the hole and measure data, resulting in the scrapping of the drilling; at the same time, the mobile drilling inclinometer needs to be manually operated on site, with a large workload and discontinuous data acquisition time

[0005] The inclinometer probe of the fixed borehole inclinometer is fixedly installed on the sliding part, and can only measure the displacement near the installation part. At the same time, the fixed borehole inclinometer has problems such as difficult positioning of the sliding belt and difficult installation. At the same time, the cable connected to the sensor is easily cut off, resulting in loss of measurement and scrapped drilling; at the same time, the cable is easy to cut into the soil or soft rock slope near the sliding surface, causing large errors in the measurement results, etc. question

[0006] Generally speaking, at present, whether it is a mobile borehole inclinometer or a fixed borehole inclinometer, there is a defect that the measurement range is small, usually within 200mm, and it is impossible to monitor large deformation displacement landslides.

However, in actual engineering, many landslides have the characteristics of multiple slip zones and large displacement and deformation. How to timely and continuously obtain and grasp the displacement and deformation state of such landslides, and accurately measure the displacement distribution in the depth has attracted widespread attention.

Therefore, it is necessary to design a new type of deep displacement monitoring system for large deformation landslides to solve the problems existing in the deep displacement monitoring of large displacement deformation landslides and landslides with multiple slip zones.

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