Method for testing mechanical parameters of stone by using center anchored bearing plate

A technology of rock mechanical parameters and bearing plates, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of bulky test equipment, high cost and large test site, and achieve simple test equipment and low installation cost. , the effect of small test site

Inactive Publication Date: 2014-02-12
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] In order to overcome the disadvantages of the existing method of testing rock mechanical parameters with pressure plates, such as large test site, bulky test equipment, inconvenient installation, high cost and long preparation period, the present invention provides a method for testing rock mechanical parameters with a centrally anchored pressure plate. method

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  • Method for testing mechanical parameters of stone by using center anchored bearing plate

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Embodiment Construction

[0018] refer to figure 1 Further illustrate method steps of the present invention:

[0019] The first step: level the surface of the rock mass at the required experimental site, and the leveling range should be larger than the area of ​​the bearing plate;

[0020] Step 2: Drill a hole at the center of the experimental point and install the anchor rod 2. A certain length of non-anchor section 6 is left during installation. The length of the non-anchor section 6 is greater than or equal to twice the diameter of the bearing plate; at this time, the anchor The length of the rod 2 should be the length of the non-anchor section 6 plus the length of the anchor section 7; the anchor rod can be mechanically anchored, resin anchored or cement mortar anchored, etc.;

[0021] The third step: fill the surface of the flattened rock mass with mortar, and place the bearing plate 1 with a central hole, and the diameter of the central hole is greater than the diameter of the anchor rod 2;

[...

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Abstract

The invention discloses a method for testing mechanical parameters of stone by using a center anchored bearing plate. The bearing plate is different from common bearing plates for an anchor rope or rod is pre-arranged in the stone soil in the center of the bearing plate. In test, a pressure needed by the test is applied onto the bearing plate by a hollow jack or prestressed tensioning equipment. According to research, when the length of the non-anchored section of the anchor rope or rod is more than two times greater than the diameter of the bearing plate, the mechanical effect exerted by the anchored section of the bearing plate on the bearing plate cannot neglected, so the bearing plate is equal to common bearing plates. Compared with common bearing plate method, the method has the advantages of compact test system, small land occupation, simplicity in test equipment, convenience in installation, low cost and short construction period.

Description

technical field [0001] The invention relates to an in-situ test method for rock mechanics parameters of geotechnical engineering such as water conservancy and hydropower, urban construction, railway traffic, and national defense construction. Background technique [0002] The bearing plate method is an in-situ test method for rock mechanics parameters widely used in geotechnical engineering such as water conservancy and hydropower, urban construction, railway transportation, and national defense construction. The theoretical basis of the pressure plate method rock mass deformation test is to apply force on the surface of the semi-infinite space rock mass through a rigid or flexible pressure plate, measure the deformation of the rock mass surface, and press the uniform, continuous, isotropic semi-infinite elastic body surface Boussniesq formula for local loads to calculate rock mass deformation characteristic parameters. In the traditional bearing plate method, when the reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 尤春安邱龑王韶辉麻壮志
Owner SHANDONG UNIV OF SCI & TECH
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