A method for testing the pull-out friction of geotextiles for rock and soil

A technology of geotextiles, test methods, applied in the direction of testing material strength using applied stable shear force, testing material strength using applied stable tension/compression, testing abrasion resistance, etc.

CN103808570BInactive Publication Date: 2016-02-17INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-02-17
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an anti-drawing and anti-friction testing method for a geotextile of a rock-soil body. The method is characterized by adopting a testing device. The device comprises a drawing stepping motor (1), a drawing force measuring ring (2), an upper sample box (6), a pressurizing framework (9), a lower sample box (13), a lower base (14), a shearing force measuring ring (15), a shearing stepping motor (16), a pressurizing lever (23) and a weight (25). With the adoption of the device, an anti-drawing test and an anti-friction shearing test of the geotextile can be carried out and a force and deformation amount F-L curve is drawn; when an indication value of a drawing displacement meter (29) or a shearing displacement meter (28) is rebounded, the maximum value of the anti-drawing or anti-friction shearing strength of the geotextile (4) can be obtained. The method is simple and practical and is flexible to operate; the method can be used for test and experiment researches on anti-drawing and anti-shearing strength properties of the various geotextiles in various porous media.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a geotechnical test method, which belongs to the technical field of civil engineering (geotechnical) engineering. Background technique

[0002] Geotextiles are widely used in reinforced soil, which can provide balanced stress for rock and soil and form a composite structural system. With the extensive development of geotechnical engineering construction in our country, the reinforced soil technology has been popularized rapidly, and the technical application far exceeds the theoretical research. How to measure the tensile strength and shear strength of geotextiles in rock and soil, so far there is no suitable experimental equipment for measurement. At present, more indicators such as tensile strength and puncture resistance of geotextiles are used. Design and construction have not yet formed a unified strength test specification and operation process. The application is to invent a test device, which is used to test the tensi...

Examples

Embodiment

[0027] (1) The steps of using the device for the pull-out test of geotextiles are as follows:

[0028] ① Install the lower sample box 13 in the lower base 14, put the lower permeable stone 18 into the lower sample box 13, lay filter paper on the surface of the lower permeable stone 18, lay the lower sample 26 on the filter paper, and lay filter paper on the surface of the lower sample 26 , the upper permeable stone 11 is installed on the filter paper, the top cover 8 is installed on the upper permeable stone 11, and the top cover 8 is connected to the pressurized shaft 10;

[0029] ② Apply a weight 25 to provide a consolidation pressure of 100kPa for the lower sample 26, so that the lower sample 26 is consolidated, exhaust and drain through the upper drainage hole 7 and the lower drainage hole 17, and the indication value of the displacement meter 31 to be consolidated is less than Or equal to 0.01mm / h and when the surface layer of the lower sample 26 after consolidation excee...