Treatment structure and reconnaissance treatment method for loess self-weight collapsible cracks

Abstract

The invention discloses a treatment structure for loess self-weight collapsible cracks and a reconnaissance treatment method.The treatment structure comprises one-way anti-seepage walls, the one-way anti-seepage walls have the one-way water permeable function and are arranged on the periphery of the cracks, and the bottoms of the one-way anti-seepage walls are lower than the bottoms of the cracks; an anti-seepage cushion layer is paved above the one-way anti-seepage wall and the crack, and the top of the anti-seepage cushion layer is flush with the ground; the longitudinal section of the bottom of each one-way anti-seepage wall is in a V shape, the two ends of each one-way anti-seepage wall are symmetrical, a pipeline with holes is installed at the bottommost portion of each one-way anti-seepage wall, a water suction pump is installed at the bottom of each pipeline with holes, and an outlet of each water suction pump is connected to the ground through a pipeline. The anti-seepage characteristic and the bearing capacity of the crack area are enhanced, the environment of the crack area is improved, the adverse effect of the crack on site construction is greatly reduced, the problem of loess self-weight collapsibility is fundamentally solved, the land utilization efficiency is improved, and land resources are saved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and relates to a governance structure and a survey and governance method for self-weight collapsible cracks in loess. Background technique [0002] Collapsible loess is a kind of soil with special properties. Its soil is relatively uniform, loose in structure and developed in pores. When it is not wetted by water, it generally has high strength and low compressibility. When it is wetted by water under a certain pressure If the pressure is less than the saturated self-weight pressure of the overlying soil, it is called self-weight collapsible loess. The collapsible fractures of self-weight loess are mainly distributed in the loess development area in northern China, and are more serious in Shanxi, Shaanxi, Gansu, Ningxia, Qinghai and Xinjiang. [0003] At present, there is no systematic comprehensive treatment method for self-weight collapsible cracks in loess. The traditional tr...

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Problems solved by technology

[0003] At present, there is no systematic and comprehensive treatment method for loess self-weight collapsible cracks. The traditional treatment method is single, mainly based on simple filling and cushioning methods, and there is no detailed survey and analysis of the width, depth and length of cracks. In-depth analysis shows that the filling and treatment carried out can only target large cracks on the surface, and the development of cracks below the ground cannot be judged, and the treatment methods have limitations. The difference is large, and the filler is generally a material with high density and small pores, which not only does not eliminate the collapsibility, but increases the surface load and aggravates the development of collapsible cracks; moreover, the traditional method has a single treatment method and does not correct the cracks. Surveying the actual scale of the site, simply filling and adding anti-seepage cushions cannot achieve one-way migration of water within the treatment range, and new collapsible cracks will still occur after infiltration by rainwater, which will easily lead to the continued development of cracks, and it is difficult to fundamentally Solve the self-weight collapsibility problem

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