Multi-sleeve static sounding element capable of effectively recognizing contact surface friction resistance of geotechnical material

Abstract

The invention discloses a multi-sleeve static sounding element capable of effectively recognizing contact surface friction resistance of a geotechnical material. A round hollow shaft rod (1) is arranged at the top of the element, four novel lateral wall friction sleeves (2) (four lateral wall friction sleeves with different surface roughness and including 2.1, 2.2, 2.3 and 2.4) are sequentially arranged under the round hollow shaft rod (1) at intervals, a single load sensor (6) is arranged on the inner wall of each novel friction sleeve (2), diamond protrusions (7) with different numbers and intervals are distributed on the surface of each friction sleeve (2), a common side lateral wall friction sleeve (3), a hole pressure filter ring (4) and a conical probe (5) are sequentially arranged under the novel lateral wall friction sleeves (2). The element has the advantages of being simple, repeatable, easy to operate and the like and provides a powerful detection tool for design of underground structures such as deep foundation, friction piles, soil blocking wall and the like, soil body recognition, soil layer interface judgment and the like.

Description

technical field [0001] The invention relates to a multi-sleeve CPT element, which belongs to a static penetration penetrating device capable of in-situ, continuously, accurately and quantitatively testing the friction resistance of contact surfaces of rock and soil materials in the field of geotechnical engineering. Background technique [0002] In the field of geotechnical engineering, the research on the friction of the contact surface of geotechnical materials has become more and more important. Accurate and effective prediction of the frictional resistance between the contact surfaces of geotechnical materials is very important for the study of the load transfer mechanism between the upper structure and the lower soil mass. The service performance is also closely related to the frictional resistance between the soil contact surfaces. The strict design method requires that the upper structure can transfer the load to the geotechnical engineering materials reasonably, but...

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Problems solved by technology

[0004] Technical problem: The technical problem to be solved in the present invention is to propose a method for in-situ quantitative testing of the friction resistance of rock and soil materials in the field of geotechnical engineering, aiming at the in-situ test of the friction resistance of the contact surface of rock and soil materials that cannot be carried out in China at present. A multi-sleeve static penetrating element for effectively identifying the frictional resistance of the contact surface of geotechnical materials

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