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Rock triaxial compression test method suitable for sample preparation through drilling

A technology of triaxial compression and test method, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc. It can solve the problems of long process time, cumbersome installation methods, and great difficulty, so as to shorten the time, reduce the test cost, The effect of improving work efficiency

Inactive Publication Date: 2014-09-10
YELLOW RIVER ENG CONSULTING
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Problems solved by technology

The triaxial compression test of rock mass belongs to the super-large test of rock mass on site. In order to meet the needs of equipment installation and personnel operation, the test needs a large test hole and a large enough space around the test body, which causes the on-site rock mass The amount of body excavation is relatively large; due to reasons such as heavy lateral loading equipment and cumbersome installation methods, it is very difficult to implement this test, and a lot of personnel is invested, which not only takes a long time but also costs a lot

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  • Rock triaxial compression test method suitable for sample preparation through drilling
  • Rock triaxial compression test method suitable for sample preparation through drilling
  • Rock triaxial compression test method suitable for sample preparation through drilling

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing, the inventive method is described in further detail:

[0018] Such as Figure 1-3 As shown, the first step adopts the blasting method to excavate a test flat hole 1 with a height of 2m and a width of 2m on the mountain;

[0019] The second step, preparation of the test body: first, after selecting the test site on the bedrock of the bottom plate surface 2 of the test flat hole 1, use a hollow drill with an inner hole diameter of 32 cm (outer diameter 32.5 cm) to drill vertically downward for the first time. The first drilling depth is 75cm; then replace the hollow drill bit with an outer diameter of 72cm (inner hole diameter 70cm) and drill downward for the second time in situ, the second drilling depth is equal to the first drilling depth, and the two drillings are concentric holes; finally, electric picks or pneumatic picks are used to remove the rock mass between the annular seam of the first drilling and the annular s...

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Abstract

The invention discloses a rock triaxial compression test method suitable for sample preparation through drilling. The method comprises the steps of 1, excavating a test adit in a mountain body by a blasting method; 2, specimen preparation: selecting a cylinder as a specimen, wherein the diameter D of the specimen is more than or equal to 30cm, and the height H of the specimen is equal to the product of the diameter D and (2.0-2.5); 3, sheathing a ring-shaped rubber capsule on the peripheral surface of the specimen, and sealing and anchoring a ring-shaped groove by a ring-shaped steel plate, wherein the shape of the ring-shaped rubber capsule is matched with those of the specimen and the ring-shaped groove; 4, installing axial loading equipment on the top surface of the specimen, finally, installing a plurality of displacement sensors in a symmetrical way on a bearing plate, and therefore, a rock triaxial compression test can be carried out according to the requirements of technical regulations. The rock triaxial compression test method has the advantages that the specimen can be prepared on site in a mechanized way, and the problems that the rock is manually dug in the existing specimen preparation process so that the long time is consumed, the excavated volume is large, and the cost is high can be solved. After the rock triaxial compression test method is used, the time of the rock triaxial compression test is greatly shortened, the working efficiency is increased, and the test expense is reduced.

Description

technical field [0001] The invention relates to a rock mass triaxial compression test method, in particular to a rock mass triaxial compression test method suitable for drilling sample preparation and lateral loading systems. Background technique [0002] The foundations of buildings, underground caverns and surrounding rocks of tunnels in hydraulic engineering construction are generally in a three-dimensional stress state, and the mechanical properties of rock are usually related to the stress state. Therefore, to measure the rock mass strength of building foundations, underground caverns and tunnel surrounding rocks under the three-dimensional stress state, the "triaxial compression of rock mass" should be carried out in accordance with the "Rock Test Regulations for Water Conservancy and Hydropower Engineering" (SL264-2001). test". [0003] At present, the above-mentioned tests are carried out. The preparation of the test body (test sample) is completed by artificial (st...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
Inventor 袁兆华
Owner YELLOW RIVER ENG CONSULTING
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