Pile side negative friction resistance test device in frozen earth areas and application method thereof

A technology of negative friction resistance and testing equipment, which is applied in the test of basic structure, construction, basic structure engineering, etc., can solve the problems of many engineering accidents, and achieve the effect of accurate test results

Inactive Publication Date: 2013-02-13
CHINA CONSTR SIXTH ENG DIV CORP
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  • Abstract
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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a pile side negative friction resistance testing device in permafr...

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  • Pile side negative friction resistance test device in frozen earth areas and application method thereof

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Such as figure 1 As shown, the pile side negative friction resistance testing device in the permafrost region of the present invention includes a hollow pile 2 and a strain gauge A3 and a strain gauge B4 arranged inside the hollow pile 2. The hollow pile 2 is arranged in a double-layer steel drum 1, and the double Inorganic thermal insulation mortar 20 is laid between the steel drums 1. The double-layer steel drum 1 is provided with a top cover 6, and a refrigeration pipe 17 is arranged along the circumference close to the inner wall of the double-layer steel drum 1. The refrigeration pipe 17 is connected with a refrigerator 18. A water supply device 11 is installed below the hollow pile 2 in the steel drum 1 and is connected to the pool 19 through pipelines. The upper and lower sides of the double-layer steel drum 1 are respectively provided with a top plate ...

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Abstract

The invention discloses a pile side negative friction resistance test device in frozen earth areas and an application method thereof. The device consists of a top cover, a top plate, a gauge stand, a dial indicator, a screw, a hollow pile, a settlement pole, a moisture transducer, a double-layer steel drum, a foil gauge A, a foil gauge B, a soil sample, inorganic thermal mortar, a bottom plate, medium sand, a moisturizing device, a pool, a refrigerator, a refrigerating tube, a frost heave thaw collapse meter and a temperature sensor. According to the device, the refrigerator is used for manpower refrigeration, the atmospheric temperature under various working conditions can be simulated, and the temperature and frost heave quantity of the soil sample can be accurately measured in real time by using the temperature sensor and the frost heave thaw collapse meter, so that the influence on the negative friction resistance by the frost heave quantity is avoided, and the test result is more precise.

Description

technical field [0001] The invention relates to a negative friction resistance testing device for engineering piles and a method for using the same, in particular to a negative friction resistance testing device for piles in permafrost regions and a method for using the same. Background technique [0002] In permafrost regions, especially permafrost regions at high latitudes, the atmospheric temperature is low in winter, the soil freezes at negative temperatures, and the soil undergoes frost heaving and heaving. The thermal melting and settlement of the body causes the soil to produce negative frictional resistance on the pile. The negative frictional resistance not only cannot bear the structural load on the upper part of the pile, but also has a negative effect on the pile downwards, greatly reducing the bearing capacity of the pile foundation. affect the safety of the superstructure. At present, the research on the negative friction resistance of piles in engineering is ...

Claims

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Application Information

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IPC IPC(8): E02D33/00E02D27/35
Inventor 柴艳飞王存贵余流张云富陆海英黄克起方杰高璞朱芳
Owner CHINA CONSTR SIXTH ENG DIV CORP
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