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Method for preparing sample used for large-scale in-situ high-pressure seepage deformation test

An osmotic deformation, in situ technique used in sample preparation for testing, permeability/surface area analysis, sampling, etc.

Active Publication Date: 2019-12-06
POWERCHINA HUADONG ENG COPORATION LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the large-scale in-situ high-pressure seepage deformation test method and the corresponding sample preparation method in the prior art, and provide a convenient, safe, reliable, and less disturbing method for weak structures in hard rocks. A preparation method for large-scale in-situ high-pressure osmotic deformation test specimens

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  • Method for preparing sample used for large-scale in-situ high-pressure seepage deformation test
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  • Method for preparing sample used for large-scale in-situ high-pressure seepage deformation test

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] A method for preparing a large-scale in-situ high-pressure osmotic deformation test sample according to an embodiment of the present invention. This embodiment takes a slow-dipping interlayer slip zone as an example to describe the method in detail.

[0041] The method comprises the steps of:

[0042] Step 1: Blasting of branch holes 19 and connecting holes 20, opening a hole 19 on both sides of the position of the selected in-situ sample 1 on the wall of the main hole 18, between the tails of the two branch holes 19 along the direction of the weak structure The connecting hole 20 is opened, and the same blasting method is adopted when the branch hole 19 and the connecting hole 20 are opened.

[0043] figure 1 It is a schematic diagram of the structure of the branch hole 19 and the connecting hole 20. The two branch holes 19 are drille...

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Abstract

The invention discloses a method for preparing a sample used for a large-scale in-situ high-pressure seepage deformation test. The method is used for preparing the sample with a soft structural surface in hard rock used for the large-scale in-situ high-pressure seepage deformation test, and is convenient to construct, safe and reliable and small in sample interference. The method comprises the following steps: step 1, blasting branch holes and a communication hole, wherein a branch hole is formed in two sides of the position of a selected in-situ sample on a main hole wall respectively, the communication hole is formed between the tail parts of the two branch holes along the trending direction of a soft structure, and the branch holes and the communication hole are formed in the same blasting mode; step 2, after the surface of the sample is flat and blasting of the branch holes and the communication hole is finished, modifying the surface of the sample, and immediately covering the soft interlayer part of the sample with a plastic adhesive tape; and step 3, arranging a water inlet bin and a water outlet bin, wherein the water inlet bin and the water outlet bin are arranged on two sides of the sample respectively, and the water inlet bin and the water outlet bin are used for carrying out the high-pressure seepage deformation test on the sample.

Description

technical field [0001] The invention relates to the technical field of underground engineering investigation and testing of hydropower and water conservancy projects, in particular to a method for preparing large-scale in-situ high-pressure seepage deformation test samples for weak structural surfaces in hard rocks. Background technique [0002] In the hydropower and water conservancy projects arranged in the basalt area, the overall occurrence of the formation is gentle, the rock is hard, and the engineering geological conditions are generally good, but there are generally different scales of interlayer and intralayer dislocation zones, steep-dipping faults, etc. Weak structural planes, which intersect and combine with each other, control the quality of the rock mass in the dam area to a large extent, and are important boundary conditions for various engineering geological problems in the dam area. After the project is impounded, under the action of the high water head of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N1/28G01N1/36
CPCG01N15/082G01N1/286G01N1/36G01N2001/366
Inventor 楚文杰石安池唐鸣发王贤彪洪望兵宋刚王鹏苑久超陈磊张嘉瑶付国斌杜俊良董联杰
Owner POWERCHINA HUADONG ENG COPORATION LTD
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