Cycle friction sleeve barrel device for evaluating periodic load pile side friction
A friction sleeve and evaluation cycle technology, applied in the field of static penetration device, can solve the problems of quantitative evaluation, in-situ pile side friction resistance under cyclic load, etc.
Inactive Publication Date: 2014-09-10
SOUTHEAST UNIV
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Problems solved by technology
[0004] Technical problem: The technical problem to be solved by the present invention is to propose an in-situ quantitative evaluation of pile side friction under cyclic load that can be used in the field of geotechnical engineering for the in-situ quantitative evaluation of pile side friction under cyclic load in China. Cyclic Friction Sleeve Static Penetration Element
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[0017] A cyclic friction sleeve element of the present invention that can quantitatively evaluate pile side friction resistance under cyclic load in situ. The element is provided with a hollow shaft from top to bottom, and hoses and two Cables for different purposes, the lower part of the hose is connected with an annular hydraulic cylinder, the lower part of the annular hydraulic cylinder is provided with a pusher, the pusher is equipped with a displacement sensor, the displacement sensor is connected with a cable, and the lower part of the pusher is a circular friction sleeve The circular friction sleeve is connected with another cable, and a stainless steel spring is installed close to the inner wall of the circular friction sleeve. Below the stainless steel spring, a side wall friction cylinder, a pore pressure filter ring and a cone probe are arranged in turn. The side wall friction A pore water pressure sensor is provided inside the cylinder.
[0018] The outer diameter ...
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The invention discloses a cycle friction sleeve barrel device for evaluating periodic load pile side friction. A hollow shaft rod(1), an annular hydraulic cylinder (4), a pusher (5), a cycle friction sleeve barrel (7), a side wall friction barrel (9), a hole pressure filtering ring (11) and a cone probe (12) are arranged on the evaluation period load pile side friction cycle friction sleeve barrel device from up to down, wherein flexible pipes (2), the first cables (3.1) and the second cables (3.2) are arranged on the left side and the right side of the upper hollow shaft rod (1), the annular hydraulic cylinder (4) is connected on the lower portion of each of the flexible pipes (2), the pusher (5) is arranged below the annular hydraulic cylinder (4), a displacement sensor (6) is mounted on the pusher (5), the displacement sensor (6) is connected with the first cable (3.1), the cycle friction sleeve barrel (7) is arranged below the pusher (5), the cycle friction sleeve barrel (7) is connected with the second cable (3.2), a stainless steel spring (8) is attached to the inner side of the cycle friction sleeve barrel (7), the side wall friction barrel (9), the hole pressure filtering ring (11) and the cone probe (12) are arranged below the stainless steel spring (8) in sequence, and a hole water pressure sensor (10) is arranged in the inner part of the side wall friction barrel (9). The cycle friction sleeve barrel device for evaluating the periodic load pile side friction has the advantages of normal position, rapidness, accuracy, quantification and the like, and supplies an effective detecting tool to period load pile side friction and evaluation of soil body shear strength and the like.
Description
technical field [0001] The invention relates to a static penetration penetrating element of a circular friction sleeve, belonging to a static force capable of in-situ, fast, accurate and quantitative testing of pile side friction resistance and soil shear strength under periodic loads in the field of geotechnical engineering Touch detection device. Background technique [0002] With the continuous development of the world's industrialization process, pile foundations are more and more widely used in construction fields such as industry and transportation. The pile foundation under certain conditions not only bears the static load from the superstructure, but also bears a certain type of dynamic load. It must bear the cyclic load brought by the loading and unloading operation of the crane; in addition to bearing the upper platform load, the pile foundation of the offshore platform also needs to bear the cyclic impact load of ocean waves; the vehicle load borne by the express...
Claims
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IPC IPC(8): E02D33/00
Inventor 蔡国军张涛刘松玉
Owner SOUTHEAST UNIV