Tensile strength determining method of 400g nonwoven geotechnical fabric under different negative temperature and water content
A technology of geotextile and tensile strength, applied in the direction of applying stable tension/compression to test material strength, etc., can solve the problem of not considering the tensile strength of geotextile
Inactive Publication Date: 2019-06-28
SOUTHEAST UNIV
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[0004] So far, there is no method for determining the tensile strength of geotextiles with different negative temperatures and moisture contents in China, and the relevant domestic regulations only list the test procedures and calculation methods for the tensile strength of geotextiles at room temperature, but do not involve Influence of negative temperature environment and moisture content on tensile strength
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[0021] Below in conjunction with specific embodiment the present invention is described in further detail:
[0022] The present invention provides a method for determining the tensile strength of 400g non-woven geotextiles at different negative temperatures and water contents, which can simply and quickly determine the tensile strength of 400g geotextiles at any moisture content and negative temperature, and provide a better solution for slopes. Provide accurate tensile strength values for geotechnical engineering stress field calculation and structural design such as reinforced soil, roadbed reinforced soil, anti-seepage treatment of landfill, etc.
[0023] The principle of the method for determining the tensile strength of 400g non-woven geotextiles under different negative temperatures and water contents of the present invention is: 400g geotextiles are cut into prescribed size samples according to the size requirements of the norms, and at a given negative temperature and...
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A Tensile strength determining method of 400g nonwoven geotechnical fabric under different negative temperature and water content comprises the following steps that the geotechnical fabric is cut according to standards, samples are configured according to corresponding water contents, and the configured sample in the corresponding water contents are placed in a curing room and cured for 24h; the maintained samples are placed in a low temperature cabinet for negative temperature processing at the temperatures of C, -3, -6, -9 and -12 DEG C for 24h, the samples after low temperature processing are immediately moved to a universal tester for stretching test; and Origin data analysis software is used to carry out regression analysis on the test data, and a tensile strength prediction empiricalformula for the 400g nonwoven geotechnical fabric under different negative temperature and water content is obtained. The tensile strength of the 400g nonwoven geotechnical fabric in any water content and negative temperature can be determined rapidly and conveniently, and accurate tensile strength values are provided for stress field calculation and structure design of rock engineering includingslope reinforced soil, roadbed reinforcing soil and landfill antiseepage processing.
Description
technical field [0001] The invention relates to a method for determining the tensile strength of underground reinforced anti-seepage materials in geotechnical engineering in the field of civil engineering, in particular to a method for determining the tensile strength of 400g non-woven geotextiles under different negative temperatures and moisture contents. Background technique [0002] Geotextiles are widely used in roadbed reinforcement, slope protection, road maintenance, landfill anti-seepage and other engineering fields due to their light weight, good water permeability, high tensile strength, high temperature resistance, and corrosion resistance. However, in engineering construction, geotextiles are often buried in rocks and soil. When geotextiles are displaced, especially when encountering rock and soil and hard soil, the stress they bear is greater than the tensile strength, resulting in fracture and damage, which brings hidden dangers to the overall isolation, reinf...
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IPC IPC(8): G01N3/18
Inventor 刘路路蔡国军刘晓燕
Owner SOUTHEAST UNIV