Unit Method and Device for Disturbance Stress Measurement
A stress measurement and strain measurement technology, which is applied in the measurement device, the measurement force, the measurement of elastic deformation force through the measurement gauge, etc. measurement, etc.
Active Publication Date: 2019-11-29
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI +1
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[0003] Conventional measurement methods, such as hydraulic fracturing, stress relief, etc., are single-time measurement of original rock stress, which cannot measure and record the change process of surrounding rock stress under disturbance conditions; pre-embedded pressure cells or The method of stress gauge is used to record the change process of stress, but it can only measure and record the stress of a single direction or a special component, and cannot realize the measurement of the three-dimensional stress field in the surrounding rock; Liu Quansheng proposed the principle of flow stress recovery, and developed the stress measurement Due to the limitation of the measurement principle, the ground stress measurement of the device is only suitable for soft rock formations. For non-soft rock formations, the hole will not converge and deform indefinitely over time until the original rock stress, but will reach stability under a small deformation state , the principle of flow stress recovery is no longer applicable
In addition, the rheological stress recovery method uses two sensors to be fixed and installed at a certain angle, and the measurement unit size is relatively large (40-50cm), while the stress field of the surrounding rock, especially the near-field disturbance stress field, changes along the depth gradient during the construction disturbance process. Very large, the measurement unit of the flow stress recovery method cannot actually measure the stress state of a single point
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[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without cre...
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An embodiment of the invention provides a unitary method and device to measure disturbed stress and relates to the technical field of geotechnical measurement. Strain measuring modules are mounted inoblique ducts in an elastic deformed body to measure axial deformation of the corresponding ducts. Strain of the elastic deformed body is calculated according to the measurement results so as to measure disturbed stress of a measurement point where a sensing device is located. The unitary method and device are good in operational convenience and better in accuracy.
Description
technical field [0001] The invention relates to the technical field of geotechnical measurement, in particular to a unit method and device for disturbance stress measurement. Background technique [0002] In recent years, the development of underground space in my country has developed rapidly, involving all aspects of life development, including traffic tunnels, hydraulic tunnels, underground factories, underground laboratories, mine roadways, civil defense projects, etc. In order to ensure the safety of underground engineering construction and operation, it is necessary to have a clear understanding of the stress field evolution process of the surrounding rock throughout the process, so there are high technical requirements for the measurement accuracy, measurement range and measurement continuity of ground stress measurement . [0003] Conventional measurement methods, such as hydraulic fracturing, stress relief, etc., are single-time measurement of original rock stress,...
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IPC IPC(8): G01L1/04G01L1/22
CPCG01L1/04G01L1/22
Inventor周辉高阳张传庆何世海石安池
OwnerINST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI