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Drilling hole stress sensor and drilling hole stress monitoring method thereof

A stress sensor and stress monitoring technology, used in geological safety monitoring and geotechnical fields, can solve problems such as inconvenience in geotechnical and geological safety evaluation, and inability to obtain stress at different depths.

Inactive Publication Date: 2009-07-29
陈洪凯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods can only obtain one data, which belongs to the average stress or average strain, and cannot obtain the magnitude of stress at different depths, which is inconvenient for the local geotechnical and geological safety evaluation of slopes.

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  • Drilling hole stress sensor and drilling hole stress monitoring method thereof
  • Drilling hole stress sensor and drilling hole stress monitoring method thereof
  • Drilling hole stress sensor and drilling hole stress monitoring method thereof

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Embodiment Construction

[0022] See attached figure 1 , 2 , the sensor of the present invention includes: a metal cylinder 1 with a longitudinal opening, a strain gauge 2, a waterproof pressure film 3, a concrete filling core 4, and a signal transmission line 5, the longitudinal opening of the metal cylinder 1 is stitched and connected, and the outer surface of the metal cylinder 1 is axially equidistant Paste a plurality of strain gauges 2, and the strain gauges 2 only need to cover a part of the circumference of the metal cylinder 1, and attach figure 2 The dotted line in the middle indicates the position covered by the strain gauge; a small hole is drilled on the metal cylinder 1 where the strain gauge 2 is covered, and the signal transmission line 5 connecting the strain gauge 2 is axially laid on the inner surface of the metal cylinder 1 through the small hole. The signal transmission line 5 starts from the corresponding strain gauge 2 and ends at the top of the metal cylinder 1 (generally loca...

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Abstract

The invention discloses a borehole stress sensor. The sensor comprises a metal tube with a longitudinal opening, a strain gauge, a waterproof pressed film, a concrete core and a signal transmission line. The metal tube with the opening which integrates the strain gauge, the signal transmission line and the waterproof pressed film is used for drilling and filling the core with concrete in site application; and the borehole stress sensor is completely manufactured and laid synchronously. The invention also discloses a borehole stress monitoring method based on the sensor. The method has the beneficial technical effects of being capable of effectively testing a stress change process of rock media at different depths in a borehole by the borehole stress sensor, effectively defining a 3D area with unsafe and less-safe rock body on a slope by joint application of a plurality of borehole stress sensors, disclosing a planar distribution range and a depth expansion range of the area, and providing an important scientific basis for subsequent project treatment and safety monitoring.

Description

technical field [0001] The invention relates to a geotechnical and geological safety monitoring technology, in particular to a borehole stress sensor and a borehole stress monitoring method thereof. Background technique [0002] my country's mountains and hills account for more than 2 / 3 of the total land area. With the rapid construction of high-grade highways and the rapid development of mountainous towns in China, the number of rock and soil high-cut slopes is increasing, the height is increasing, and the slope is becoming steeper. Security issues are becoming increasingly prominent. For example, on November 20, 2007, a huge landslide disaster occurred on the K1405 slope of National Highway 318 in Gaoyangzhai, Badong County, Hubei Province. A bus with the license plate number EQ20684 was buried by the landslide, and all 31 people in the car were killed. The source of the disaster is located 34m above the road surface. The length of the collapse body along the direction of ...

Claims

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Application Information

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IPC IPC(8): G01L1/04G01B21/32
Inventor 陈洪凯唐红梅
Owner 陈洪凯
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