Application of muddy lime soil flushing and backfill method in water conservancy and civil engineering

Abstract

At present, there are many types of water conservancy and civil engineering projects. In addition to the frequent occurrence of heavy rains during the flood season, there are many rain and flood disasters. Various holes and pits often appear. China's water conservancy project is taken as an example of the Middle Route of the South-to-North Water Diversion Project, which is known as the “Human Tianhe”. The main route of the South-to-North Water Transfer Project is 1432km long. There are various buildings along the route, including 3,623 bridges, inverted siphons, gate stations, and bridges across the canal. Taking the Yellow Crossing Project as an example, the upper part of the stratum lithology of the excavated canal section on the south bank of the Crossing Yellow River is loess or silty. Loam, the middle and lower parts are loess-like silty loam, and its properties will change greatly after the accumulation of water, especially after the platform surface water, along the vertical joints or vertical micro-fissures, the rapid infiltration makes the loess saturated and disintegrated. The collapsible self-skeletal structure is destroyed, and due to gravity, it is easy to form horizontal and vertical penetrating sinkholes, sinkhole cavities, or partial collapse of the slope. In order to solve this kind of infiltration or erosion channel defect treatment, and at the same time to be economical and practical, the Yellow Crossing Management Office has developed a muddy lime soil flushing and backfill method after long-term research and successfully applied it.