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Cross plate shear apparatus and penetration method thereof

A technology of shear instrument and cross plate, which is applied in the direction of applying stable shear force to test the strength of materials, etc., can solve the problems that cannot meet the needs of engineering design, and achieve the effect of enhanced penetration ability and high pressure

Inactive Publication Date: 2010-12-08
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Due to the influence of the penetration ability of the common cross-plate shear tester, in soft cohesive soil, the cross-plate shear test can only be carried out in shallow soil layers with a depth of 25m, while in deep foundation pits and high-fill subgrades In other projects, the engineering impact depth is often above 35m, and the parameters provided by the existing cross-plate shear test can no longer meet the needs of engineering design.

Method used

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  • Cross plate shear apparatus and penetration method thereof
  • Cross plate shear apparatus and penetration method thereof

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Embodiment Construction

[0029] Such as figure 1 As shown, the present invention provides a cross plate shearing instrument 100, which includes a ground beam 10, a beam 20 above the ground beam 10, an oil cylinder erected between the ground beam 10 and the beam 20 and supporting the beam 20 30. The turbine box 40 and the vertical shaft 50 installed on the beam 20, and the probe rod 60 vertically passing through the beam 20 and the ground beam 10.

[0030] The ground beam 10 is placed horizontally and is located at the bottom of the cross-plate shearing instrument 100 to support the oil cylinder 30 and the beam 20. The bottom surface of the ground beam 10 is parallel to the ground surface (not shown), so that This enables the ground beam 10 to fit smoothly on the ground surface (not shown), and also improves the accuracy of the probe rod 60 .

[0031] The crossbeam 20 is located above the ground beam 10 and is arranged horizontally. The two ends of the crossbeam 20 are erected above the oil cylinder 3...

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Abstract

The invention discloses a cross plate shear apparatus, comprising a grade beam, a beam arranged above the grade beam, a feeler lever which penetrates into the beam and the grade beam in a vertical direction and a vertical shaft connected with the beam, wherein the tail end of the feeler lever is provided with a cross plate head which penetrates into a soil layer; the cross plate shear apparatus is further provided with a turbine box and a hydro-cylinder, wherein the turbine box is arranged on the beam and is penetrated by the feeler lever, and the hydro-cylinder is arranged between the grade beam and the beam; and the vertical shaft can realize moving in a vertical direction with variation of oil pressure in the hydro-cylinder. The cross plate shear apparatus of the invention can press the cross plate head to be 35-40m in depth by means of the characteristics of large oil pressure and a strong penetration capability, thereby well solving the defect of insufficient penetration depth for the cross plate head in the prior art.

Description

technical field [0001] The invention relates to a cross-plate shearing instrument and a penetration method thereof, in particular to a cross-plate shearing instrument and a penetration method thereof for increasing soil penetration force through hydraulic pressure. Background technique [0002] The cross-plate shear test is an in-situ test for determining the shear strength of soft cohesive soil with a cross plate. Penetrate the cross head into the soft soil and rotate it at a uniform speed. Through a certain measuring system, measure the torque required for its rotation until the soil is destroyed, so as to calculate the shear strength of the excavated soil. [0003] Due to the influence of the penetration ability of the common cross-plate shear tester, in soft cohesive soil, the cross-plate shear test can only be carried out in shallow soil layers with a depth of 25m, while in deep foundation pits and high-fill subgrades In other projects, the engineering impact depth is ...

Claims

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Application Information

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IPC IPC(8): G01N3/24
Inventor 沈日庚徐敏生蒋燕
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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