Construction method of long-term deformation model of hard rock freeze-thaw damage
A deformation model and construction method technology, applied in the field of rock mechanical properties research, can solve problems such as damage mechanism, inability to accurately infer hard rock deformation, and large data dispersion.
Active Publication Date: 2022-07-08
CHINA RAILWAY ERYUAN ENG GRP CO LTD +1
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[0003] At present, the long-term deformation of freeze-thaw hard rock can be quantitatively analyzed through indoor freeze-thaw rheological tests. However, due to the randomness of hard rock selection and experimental errors, the data dispersion is large, and the constructed equation cannot accurately infer hard rock. However, establishing a rheological constitutive model of hard rock freeze-thaw damage and fitting test data can further qualitatively and quantitatively predict the long-term deformation of hard rock. description, it can also reflect its internal damage mechanism
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[0047] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.
[0048] refer to figure 1 , figure 1 A flow chart showing the construction method of the long-term deformation model of hard rock freeze-thaw damage; as figure 1 As shown, the method 100 includes steps 101 to 105 .
[0049] In step 101, a freeze-thaw cycle test with different freeze-thaw cycles is performed on the rock sample; the different freeze-thaw cycles here refers to the number of freeze-thaw cycles of some rock samples among sever...
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The invention discloses a method for constructing a long-term deformation model of hard rock freeze-thaw damage. The instantaneous freeze-thaw damage variables of the sample were obtained; the long-term freeze-thaw damage variables of rock samples with different freeze-thaw cycles were obtained by uniaxial creep test; The damage variables and long-term freeze-thaw damage variables are used to construct a hard rock rheological damage constitutive model that introduces freeze-thaw damage; Laplace and Laplace inverse transformation are used to solve the hard rock rheological damage constitutive model, and the long-term deformation of hard rock freeze-thaw damage is obtained. Model.
Description
technical field [0001] The invention relates to the research field of rock mechanical properties, in particular to a method for constructing a long-term deformation model of hard rock freeze-thaw damage. Background technique [0002] The rheological damage of freeze-thaw hard rock refers to the fatigue damage and rheological deformation of hard rock under long-term load under freeze-thaw cycle conditions. Hard rock is a special material with complex composition and structure, and contains a large number of micro-cracks inside, which is an important factor that dominates the mechanical properties of rock mass. Hard rocks in alpine regions are subject to freeze-thaw cycles, resulting in serious internal deterioration. Under the action of freeze-thaw cycles, the internal micro-defects of hard rock will continue to breed, generate and expand, and then accelerate the weathering, which is manifested as damage to the mechanical properties of the rock mass. and destruction. From ...
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IPC IPC(8): G06F30/20G06F119/14
CPCG06F2119/06G06F30/20
Inventor 张广泽王栋蒋良文王科冯涛张羽军陈国庆万亿张小林马建军桂金祥
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD