大面积真空预压边界密封技术的应用

采用真空预压法对新吹填土及软弱地基进行加固时,边界密封通常采用密封沟的处理方法。但是,对于存在透水、透气的土层,边界密封仅采用密封沟方法不仅不经济,而且也不能达到加固效果。结合大面积真空预压地基处理工程中土层透气、工程造价、工期等实际情况,介绍区间采用密封沟与区域采用黏土密封墙相结合的边界密封技术。工程实践表明,加固效果良好,经济合理。

Application of boundary sealing technology in large-area vacuum preloading

During the reinforcement of the newly-filled or weak ground,the sealing trench is often used to seal the boundary.But,for the permeable and breathable soil,the application of sealing trench for the boundary sealing during large-area vacuum preloading treatment is neither economical nor effective.Considering the breathable soil,engineering cost and construction period,we adopt a new technology to seal the boundary by a combination of sealing trench in sections and clay sealing wall in the whole region.It’s shown that the technology possesses an obvious effect on the soft soil foundation and has achieved very good economic benefit.