When encountering karst caves during pile foundation construction,traditional techniques mainly include steel casing follow-up,grouting,backfilling concrete,backfilling with rubble and clay,etc.However,some of these techniques have higher costs and some have limited treatment effects.To address the contradic-tion between economy and treatment effectiveness,an innovative approach is proposed to backfill the shell structure into the pile hole process.This structure utilizes the principles of clay solidification and extrusion molding,by adding 30％Na2SO4 and 20％CaO to the clay to quickly solidify it.Then,the solidified clay is squeezed into a shell like structure and backfilled into the pile hole where the karst cave appears,and re-peatedly impacted to achieve the purpose of sealing the karst cave.
关键词
岩溶发育区/桩基础/黏土快速固化/壳状结构体/抗剪强度
Key words
karst development zone/pile foundation/rapid solidification of clay/shell like structure/shear strength
维普
万方数据