Soil in-suit boring shearing testing device

A testing device and soil technology, applied in directions such as applying stable shear force to test material strength, applying stable tension/compression to test material strength, etc., can solve the problem that absolute flatness cannot be guaranteed and the test instrument is perpendicular to the axis of the hole. Problems such as the inability to install the test device normally and the complex structure, etc., achieve the effect of simple structure, simple and accurate data, and small disturbance

Inactive Publication Date: 2015-11-18
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

At present, the rock drilling shear test device widely used in China can quickly detect the shear strength of soft rock and rock that cannot be cored at the test site. It has the advantages of simple operation and high test accuracy, but for soil whose strength is much smaller than rock body does not apply
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  • Soil in-suit boring shearing testing device
  • Soil in-suit boring shearing testing device
  • Soil in-suit boring shearing testing device

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[0015] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.

[0016] Such as Figure 1-Figure 4 It can be seen that the soil in-situ drilling shear test device of the present invention is mainly composed of an operating platform 100, a vertical tension mechanism 200, a shear probe 300, a supporting cylinder and a pressurized air pump 400; the operating platform 100 is a four-legged support (120 is one of the supports) platform; a pair of supporting cylinders (520 and 530) support the vertical tension mechanism 200 on the operating platform 100; one end of the pull rod 600 is connected to the power output end of the vertical tension mechanism 200, and the other The shearing probe 300 is hung on one end...

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Abstract

The invention discloses a soil in-suit boring shearing testing device. The soil in-suit boring shearing testing device is mainly composed of an operating deck 100, a vertical tensile mechanism 200, a shearing probe 300, and a support oil cylinder and pressurization air pump 400. When the soil in-suit boring shearing testing device is applied to borehole shear test, in-suit rapid determination of soil cohesive force and internal friction angle can be realized; compared with laboratory tests and borehole shear tests, obtained data is more simple and accurate; device portability is excellent; construction is simple; test operation and data collection can be completed only by one person; it can be determined that whether a plurality of sets of experiments are necessary based on field test results quickly; compared with indoor triaxial test and direct shear test, disturbance on soil is less, applicability is excellent; soil taking holes left by engineering preliminary stage geological exploration can be used directly, so that repeat boring is avoided, and resources are not wasted.

Description

technical field [0001] The invention relates to a rock-soil performance testing device, in particular to a device for measuring the shear strength parameters of fine-grained sandy soil, clay and silt soil in situ. Background technique [0002] In geotechnical engineering technology, the shear strength index cohesion and internal friction angle of soil are important mechanical properties and important parameters for engineering design calculation. Usually, indoor shear test and in-situ shear test are used to measure the shear strength index of soil. Indoor shear tests include triaxial tests and direct shear tests, which take hours or even days to conduct tests, and through the process of on-site sampling, sample making, etc., the disturbance to the soil is very large, and the drainage conditions are difficult to control , the above factors will cause the test results and the actual results are very different. The in-situ shear test is carried out in situ on the soil, and th...

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Application Information

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IPC IPC(8): G01N3/08G01N3/24
Inventor 崔凯李伟吕东杨烨李欢欢
Owner SOUTHWEST JIAOTONG UNIV
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