Soil body shearing testing device and soil body shearing method

A technology of shear test and soil, applied in the direction of applying stable shear force to test the strength of materials, etc., can solve the problems of calculation not considered, uneven distribution of shear stress, high price, etc., and the accuracy is easy to guarantee and test The effect of short time and simple installation

Inactive Publication Date: 2014-03-05
ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

The direct shear test artificially limits the position of the shear plane, the shear stress distribution is uneven during the shear process, the shear area gradually decreases but is not considered in the calculation, and the drainage cannot be well controlled for a long shear time; three. The axial shear test instrument has complex structure, high price, and high technical re

Method used

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  • Soil body shearing testing device and soil body shearing method
  • Soil body shearing testing device and soil body shearing method
  • Soil body shearing testing device and soil body shearing method

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] Such as figure 1 with 2 As shown, the soil shear test device of the present invention includes a special ring knife 1, a pressurization system and a micro-penetrator. There are multiple side holes 2 around the special ring knife 1 (depending on the test requirements), such as four Side hole 2, spacing 90 o , the pressurization system is composed of a pressurized top cover 3, a lever 4 and a weight 5, and the micro penetrometer has a conical probe 6 and a reading window 7.

[0021] The principle of the soil shear test method of the present invention is as follows: use a special ring knife to cut the soil body to make a sample, apply a normal stress s on the surface of the sample, and then use a micro penetrometer to penetrate the sample at the side hole of the special ring knife, The penetration resistance can be obtained, and the penetration resistance can be conv...

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Abstract

The invention discloses a soil body shearing testing device. The soil body shearing testing device comprises a special cutting ring, a pressurizing system and a mini-type injection instrument. The shearing testing device is characterized in that a plurality of side holes are formed in the periphery of the special cutting ring; the pressurizing system is composed of a pressurizing top cover, a lever and a weight; the mini-type injection instrument is provided with a conical probe, a reading window and the like. The invention discloses a soil body shearing testing method. According to the brand-new shearing testing device and shearing testing method for determining the shearing strength index of the soil body, the device is simple and convenient to operate; the shearing strength index of the soil body can be determined by only using one test sample and the uniformity of the test sample is guaranteed; the time for injecting the soil body by virtue of the mini-type injection instrument is short and the test sample can be controlled well to discharge water; all the characteristics are good for the accuracy of testing results; the soil body shearing testing device and the soil body shearing testing method are suitable for various civil engineering construction fields.

Description

technical field [0001] The invention belongs to the field of civil engineering, in particular to a soil shear test device and a test method. Background technique [0002] In civil engineering construction, the shear strength index of soil (cohesion force) is required in many fields such as determining the bearing capacity of the foundation, calculating the earth pressure of the retaining wall, and checking the stability of the soil slope. c , internal friction angle j ), the soil shear strength index is obtained through shear tests, and the existing shear test methods include direct shear tests and triaxial shear tests. The direct shear test artificially limits the position of the shear plane, the shear stress distribution is uneven during the shear process, the shear area gradually decreases but is not considered in the calculation, and the drainage cannot be well controlled for a long shear time; three. The axial shear test instrument has complex structure, high price, ...

Claims

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Application Information

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IPC IPC(8): G01N3/24
Inventor 秦鹏秦植海王海波徐蔚吴昉
Owner ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
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