Pile lateral friction resistance test device and method for simulating indoor soil stress state around pile

Abstract

The invention relates to a pile lateral friction resistance test device and method for simulating an indoor soil stress state around a pile, and belongs to the field of foundation engineering and foundation treatment. The pile lateral friction resistance test device includes a pile-soil action mechanism, a pressure chamber loading mechanism and a data collection mechanism, the pile lateral friction resistance test device and method aim at restoring the actual stress state of soil around the pile in a stratum, overburden pressure and horizontal lateral pressure are simultaneously applied to thesoil around the pile through two sets of hydraulic devices, and under the condition of vertical loading of the top of the pile, pile lateral friction resistance at any depth in one soil layer is measured. A relation curve between the pile lateral friction resistance and displacement of a pile body is measured to analyze performance of the pile lateral friction resistance with the displacement ofthe pile body, an ultimate lateral friction resistance value of the soil layer at any depth is obtained accurately, the problem of reasonable value of pile foundation lateral friction resistance in current engineering practice design is solved, and an important parameter basis is provided for valuing lateral friction resistance of pile foundation engineering design.

Description

technical field [0001] The invention relates to a pile side friction resistance test device and method for indoor simulating the stress state of soil around a pile, and belongs to the field of foundation engineering and foundation treatment. Background technique [0002] With the extensive application of friction piles and end-bearing friction piles in construction, the accuracy requirements for the value of pile side friction resistance are getting higher and higher. How to accurately evaluate pile foundation side friction resistance has become one of the core issues in pile foundation design. First, at the same time, the research on the mechanism and performance characteristics of pile side friction resistance also has important engineering theoretical analysis and practical application value. [0003] In the current codes for the design of pile foundation lateral friction resistance, the empirical value of the ultimate lateral friction resistance of a single pile is usual...

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Problems solved by technology

[0003] In the current codes for the design of pile foundation lateral friction resistance, the empirical value of the ultimate lateral friction resistance of a single pile is usually given according to the degree of compactness and hardness of the soil layer, and the value of the lateral friction resistance given is generally a fixed value. The impact of resistance leads to low valuations that are conservative, resulting in waste or high valuations that pose safety hazards

Although in engineering, field static load tests are generally required to determine the bearing capacity of piles after pile construction, but since the design and construction are completed, verification is the main focus, and it has little guiding effect on the design of side friction resistance, and it requires a lot of manpower and material resources

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