Passive pile soil arching effect testing method based on seepage effect

Abstract

The invention discloses a passive pile soil arching effect testing method based on a seepage effect. The method comprises the following steps: preparing a soil sample; designing a pile distance, and arranging a displacement meter; simulating a passive pile pile-soil interaction environment, and burying a pressure box or an osmotic pressure gauge in the soil sample; simulating landslide push force, building a water circulating system for simulating seepage, monitoring stress, displacement and pore water pressure changes at different positions of the soil sample through the pressure box, the displacement meter and the osmotic pressure gauge, and building an internal stress field, a surface displacement field and a seepage field of the soil sample; changing a water environment of the soil sample; changing the type, shape, size and pile distance of a simulation pile in a test box; replacing the soil sample, and researching soil arching effects in different environments. By adopting the passive pile soil arching effect testing method, the forming, developing and failing processes of a soil arch under a water-free condition, a water-saturated condition and a seepage condition are simulated for the first time, the mechanism of water-soil interaction in the soil arching effect is revealed; researches on the aspects of foundation pit supporting and slope prevention and control are enriched, and relevant theories of the conventional soil-arching effect under the seepage condition are supplemented.

Description

technical field [0001] The invention relates to the technical field of retaining engineering such as foundation pits, water conservancy, traffic and slopes, and in particular to a passive pile-soil arching effect test method based on seepage action. Background technique [0002] Passive piles are widely used in engineering support such as slopes, slope treatment, and foundation pits. The reason for their excellent soil retaining effect is the soil arch effect-the uneven displacement of the soil behind the pile, and the slide in the soil The thrust is transmitted to the pile body, and the soil between the piles is compacted at the same time. Since Terzaghi proved the existence of the soil arch effect through the trap door test in 1943, with the continuous in-depth development of the field of geotechnical engineering, there are more and more engineering data, experiments and theoretical studies related to the soil arch effect. With the continuous progress of the soil arch the...

AI Technical Summary

Problems solved by technology

When piping damage occurs, the fine-grained soil in the soil is taken away with the water flow, and the soil skeleton is destroyed; and, when the fine-grained soil moves with the water in the large-grained pores, it may silt the pores, and at the silted place there will be Large penetration force, leading to soil damage

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