A device and method for measuring geostress in soft rock
A technology of in-situ stress and stress, applied in the field of devices for measuring in-situ stress in soft rock, can solve the problems of complex operation process and large measurement error
Active Publication Date: 2018-09-14
UNIV OF SCI & TECH BEIJING +1
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[0003] Conventional three-dimensional in-situ stress measurement methods are water fracturing method and sleeve core stress relief method. Not only the operation process is complicated, but also the measurement error is relatively large. A new in-situ stress measurement method and device urgently needs to be developed
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[0044] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0045] The present invention provides a device and a method for measuring soft rock stress, aiming at the problems of cumbersome operation procedures, complicated device structure and many limiting factors in the existing geostress measurement method.
[0046] like figure 1 , figure 2 , image 3 and Figure 4 As shown, the device includes a wire 1, a rod body 2, a cavity 5, a data collector 6, a waterproof membrane 7 and a sensor 8, the wire 1 is located inside the rod body 2, and the inside of the rod body 2 is a cavity 5 except for the wire 1, and one end of the wire 1 Connected to the data collector 6, the other end of the wire 1 is connected to the sensor 8, the sensor 8 is located at the outer end of the rod body 2, and the sensor 8 is wrapped w...
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The invention provides an apparatus and method for measuring crustal stress of soft rocks, and belongs to the technical field of crustal stress measurement. The apparatus comprises a wire, a rod body, a grouted stone body, drill holes, a cavity, a data collector, water-proof membranes and sensors, wherein the wire is arranged in the internal center of the rod body, and the other parts in the rod body are the cavity except the wire; the rod body is arranged in the drill holes; the surrounding of the rod body is grouted so that the grouted stone body is formed; the wire is connected with the data collector; the sensors are arranged at the end parts of the rod part; and the water-proof membranes wrap the outer parts of the sensors. The method for measuring crustal stress of soft rocks comprises the steps: arranging a horizontal hole and an oblique hole in a vertical plane (M) of a tunnel and arranging a horizontal hole and an oblique hole in the other inclined plane (N); putting the measuring device in the holes; and performing grouting. Therefore, the aim for measuring the crustal stress can be achieved by means of measurement of the stress state in the grout stone body. The invention provides a new crustal stress measuring method. The new crustal stress measuring method can accurately measure the three dimensional crustal stress; the measuring rod is simple in structure; and the new crustal stress measuring method is not limited by the measuring depth in theory and is high in the measuring accuracy.
Description
technical field [0001] The invention relates to the technical field of geostress measurement, in particular to a device and method for measuring geostress of soft rock. Background technique [0002] With the rapid development of my country's infrastructure construction, the scale of various rock mass projects is getting larger and larger, and the requirements for engineering design and construction quality are getting higher and higher. Corresponding geotechnical engineering problems continue to emerge, and rock mass stress It is one of the important parameters affecting rock mass stability and engineering safety. The measurement of ground stress has always occupied a very important position in the history of the development of rock mechanics in my country. It not only has important theoretical significance, but also has important application value. [0003] Conventional three-dimensional in-situ stress measurement methods are water fracturing method and core stress relief m...
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IPC IPC(8): G01L5/00E21B49/00
CPCE21B49/00G01L5/0004
Inventor 吴顺川蒋一波李想严琼
Owner UNIV OF SCI & TECH BEIJING