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Method for testing rock expansion force

An expansion force and rock technology, applied in the field of technical geotechnical engineering, can solve the problems of tediousness, inaccurate expansion force test, manual reading of the dial indicator degree error, etc., to improve accuracy, reduce human error, and ensure accurate sexual effect

Inactive Publication Date: 2019-01-11
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology

The prior art equipment is mainly the consolidation instrument used in the laboratory to carry out the expansion test on the expansive rock sample in the laboratory, and the consolidation instrument needs to use the vertical dial gauge to measure the axial deformation of the expansive rock after it meets water. In one measurement, there is inevitably an error in the degree of manual reading of the dial gauge, resulting in inaccurate expansion force testing, and frequent readings are required during the test process, which is relatively cumbersome

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] This embodiment relates to a method for testing rock expansion force, by figure 1 combine figure 2 As shown, the method includes the following steps:

[0031] S1, preprocessing, processing the rock into a cylindrical rock sample 1 with a diameter D1 of 25 mm and a height H1 of 60 mm;

[0032] S2, wrapping the adhesive layer 4 on the outer peripheral surface of the rock sample 1 to make the artificial rock core 2, and determine the elastic modulus E of the adhesive layer 4 by uniaxial mechanical testing;

[0033] S3, soaking the artificial rock core 2 with water, collecting relevant parameters of the adhesive layer 4 during the soaking process, and recording the hoop strain ε o...

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Abstract

The invention provides a method for testing a rock expansion force, comprising the following steps: S1, processing the rock into a rock sample; S2, wrapping an adhesive layer on the outer peripheral surface of the rock sample, and determining an elastic modulus E; S3, soaking an artificial core with water, and recording a hoop strain epsilon of the adhesive layer; and S4, taking the data obtainedin the S2 and S3 into the formula: sigma is equal to Eepsilon, and calculating the formula to obtain an expansion force sigma at the junction of the adhesive layer and the rock sample, wherein sigma is the expansion force of the rock sample. By processing a rock sample into an artificial core having an adhesive layer, pre-calculating the elastic modulus E of the adhesive layer, then soaking the artificial core with water, and obtaining the expansion force due to formula calculation by recording the hoop strain epsilon of the adhesive, the method for testing a rock expansion force provided by the invention greatly reduces personal errors and improves the accuracy of the test, compared with the traditional method of reading for many times by a vertical dial gauge.

Description

technical field [0001] The invention relates to the subject field of technical geotechnical engineering, in particular to a method for testing rock expansion force. Background technique [0002] Expansive rock refers to a rock that undergoes physical and chemical reactions with water, and its water content increases with time, causing its volume to expand. It is a rock that is easy to weather and soften. The expansion of rock will produce expansion force on the structures in or on it, which will affect the stability of the project. It is an important work in the field of geotechnical engineering to test the expansion force. The prior art equipment is mainly the consolidation instrument used in the laboratory to carry out the expansion test on the expansive rock sample in the laboratory, and the consolidation instrument needs to use the vertical dial gauge to measure the axial deformation of the expansive rock after it meets water. For each measurement, there will inevitably...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
CPCG01L5/0028
Inventor 李浩然李德康董志凯刘博欧阳作林赵维刚范玲玲陈明义
Owner SHIJIAZHUANG TIEDAO UNIV
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