A Test Method for Vertical Static Load Test of Single Pile Under Stable Confined Water Conditions

Abstract

The invention discloses a test method for a single pile vertical static load test under the stable confined water condition. The test method comprises the following steps that (1) the size of a model pile and the thicknesses of soil bodies in a box are determined; (2) the water pressure of a pressure bearing layer is determined; (3) soil layers are paved by layers, and the model pile is buried; (4) force transferring water bags are placed; (5) back pressure plates are placed; (6) a vertical loading system and a data acquisition system are placed; (7) the water pressure of the pressure bearing layer is loaded; (8) the loading level is determined, and graded loading is implemented; (9) the pile top is vertically loaded; (10) the vertical compressive ultimate bearing capacity of the model pile is determined; (11) a test device is disassembled; (12) the vertical bearing capacity characteristic value of the single pile is determined; and (13) the pressure of a confined water layer is adjusted, the water pressure of the pressure bearing layer is increased to the next level, and the steps (2) to (12) are repeated to obtain the characteristic values of the pile foundation vertical bearing capacity under different confined water pressure conditions. The test method is good in effect, convenient to operate, low in cost and short in time.

Description

technical field [0001] The invention relates to a test method for a vertical static load test of a single pile under the condition of stable confined water, which is mainly applicable to the research on the vertical bearing characteristics of a single pile under the condition of confined water in the indoor vertical static load test, and belongs to the pile foundation test technology field. Background technique [0002] With the accelerated development of cities across the country, the scale of buildings is gradually increasing, and there are more and more high-rise buildings. For the erection of high-rise buildings, the pile foundation plays an indispensable role, and it can transfer the upper load to the foundation. In order to achieve the ideal bearing layer, the length of the pile foundation is continuously increased, and the pile foundation often goes deep into or even passes through the bearing layer. Due to the existence of hydrodynamic pressure, the vertical bearin...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing single pile vertical static load test method, such as complex effect, troublesome operation, high cost and long cycle, the present invention provides a stable pressurized water test method with good effect, convenient operation, low cost and short time. Test method for vertical static load test of single pile under conditions

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