Method for immersing collapsed loess site

Abstract

The invention relates to foundation treatment in a collapsed loess area, in particular to a method for immersing a collapsed loess site, which is characterized in that a circle of underground piling wall is formed in a proposed site or at a plant area boundary to form a bucket-shaped water-proof curtain; immersion sag removal is performed within the containment range of the water-proof curtain to prevent immersion water in the site from permeating out of the site, thus, water runout and piercing are effectively prevented, and the water consumption is greatly reduced. As the water runout phenomenon cannot happen, the water can be pumped after a soil body is immersed and the sedimentation is stable, thus, the compaction process is accelerated, and the time from immersion to sedimentation stabilization is greatly shortened; the sedimentation range is effectively controlled, thereby, the adverse effects on existing buildings and farmlands at the periphery of the site are eliminated, and simultaneously, the possibility that the immersion soil body landslides is greatly reduced. When construction is performed, the underground piling wall can also be used as a foundation pit slope protection facility and a plant area wall foundation.

Description

Technical field [0001] The invention relates to foundation treatment in collapsible loess areas, in particular to a water immersion method for collapsible loess areas. Background technique [0002] For large thickness self-weight collapsible loess foundation, eliminating self-weight collapsibility is a necessary condition to ensure the safety of buildings. At present, mature collapsible loess foundation treatment methods include dynamic compaction method, water immersion method, crushed stone compaction pile, lime soil pile, etc., each of which is limited by factors such as environment and transportation. [0003] The water immersion method was used in the foundation reinforcement and treatment of industrial and civil buildings in collapsible loess areas in my country in the 1960s. Under the saturated self-weight pressure, collapsibility occurs and compaction occurs, so as to eliminate the self-weight collapsibility of all soil layers and the external load collapsibility of ...

AI Technical Summary

Problems solved by technology

1. Because there are no surrounding restrictions, the water seeps into the surrounding soil after being immersed in the soil layer, and the water consumption is large; 2. Due to the sinking and cracking of the ground around the site when flooded, it is easy to cause "running water" and holes, affecting the safety of nearby buildings; 3. Due to the compaction and settlement of the soil after flooding, the porosity of the soil decreases, which prevents the seepage of water, resulting in the time required for the water content of the soil to decrease to a certain level after the site is soaked in water and the sinking is stable. 4. In mountainous areas, when the bottom of the loess layer tends to go downhill and the inclination angle is large, the bulk density of the saturated soil increases after flooding, and the sliding force of the soil increases. landslide

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