A Field Direct Shear Test Method for Weak Interlayer Between Layers of Rock Mass
A technology of weak interlayer and test method, which is applied in the direction of applying stable shear force to test the strength of materials, instruments, measuring devices, etc., and can solve problems such as inability to perform on-site direct shear tests on weak interlayers between rock mass layers
Active Publication Date: 2019-07-09
CHINA THREE GORGES UNIV
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is to provide a field direct shear test method for the weak interlayer of rock mass, which can solve the problem that the on-site direct shear test cannot be carried out on the weak interlayer of rock mass, integrating sample preparation, loading and shearing Integrated, can complete the whole test process on site
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Embodiment 1
[0033] like Figure 2-8 Shown, a kind of rock mass interlayer soft interlayer spot direct shear test method, this method comprises the following steps:
[0034] Step 1: Preparation of Sample 1:
[0035] Step 1-1: Determine the position of the weak interlayer 101 between rock mass layers on site, and mark the boundary between the weak interlayer 101, the upper rock mass 102 and the lower rock mass;
[0036] Step 1-2: Dig out the first interlayer hole 104 on the weak interlayer 101 of the rock mass based on the boundary line, the width and depth of the first interlayer hole 104 are greater than 3 times the thickness of the weak interlayer 101 and greater than the scissors type half shear Cut box 2 width and depth;
[0037] Step 1-3: the weak interlayer 101 on the first interlayer hole 104 side digs out the second interlayer hole 204, the width and depth of the second interlayer hole 204 are greater than the width and depth of the scissors type half-cut box 2, in the second Af...
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The invention provides an on-site direct shear test method of a weak interlayer between rock mass layers. The method comprises the following steps: Step 1, performing preparation of a specimen: Step 1-1, marking a boundary of the weak interlayer, the upper rock mass layer and the lower rock mass layer, Step 1-2, digging a first interlayer hole in the weak interlayer between the rock mass layers by taking the boundary as reference, Step 1-3, digging a second interlayer hole in the weak interlayer on one side of the first interlayer hole, and Step 1-4, completing the preparation of the specimen; and Step 2, performing on-site direct shear test on the weak interlayer between the rock mass layers: Step 2-1, completing anchor pile counterforce device assembling, and Step 2-2, completing the on-site direct shear test on the weak interlayer between the rock mass layers. The on-site direct shear test method of the weak interlayer between the rock mass layers can solve the problem of incapable on-site direct shear test on the weak interlayer between the rock mass layers, integrates specimen preparation, loading and shearing, and can complete a whole test process on site.
Description
technical field [0001] The invention relates to the field of rock sample direct shear tests, in particular to a field direct shear test method for weak interlayers between rock mass layers. Background technique [0002] Affected by geological processes and weathering, weak interlayers of different scales, sizes and depths will develop in the slope rock mass, and the interlayers are potential slip zones. According to the origin, the weak interlayers of rock masses can be divided into two types: primary type and secondary type. The former is mainly composed of quartz sandstone with clayey rock layers or thin mudstone layers; the latter is a weak interlayer formed by weathering, leaching, or interlayer shear and fault dislocation. In the soft and hard rock mass, often due to stratum folds and bedding dislocation, different parts of the soft strata are damaged to different degrees, showing structural zoning. Generally, it can be divided into joint zone and mud layer. The mudd...
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IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/02G01N3/24
Inventor 邓华锋方景成肖瑶张吟钗王伟
Owner CHINA THREE GORGES UNIV