强夯在水闸建筑物大面积地基处理中的研究与应用

Application research of dynamic compaction in large area foundation treatment of sluice building

水闸工程对地基承载力和变形要求较高,一旦地基出现极限承载破坏或变形过大的问题,会对水闸运行产生较大影响。本文以六安市某水利枢纽工程为例,其地基土为级配不良砾和回填砂砾石,承载力不满足要求、回填土沉降较大,需要进行地基处理。文中经过方案比选,最终采用强夯法进行地基处理。经处理后,实测的承载力与变形模量达到设计要求,后续检测的基础沉降量远小于规范要求,强夯地基处理效果显著。此次研究为后续类似工程的地基处理设计提供参考依据,以节约投资、加快施工进度。

Sluice engineering has high requirements on the bearing capacity and deformation of the foundation.Once the ultimate bearing failure or deformation of the foundation occurs,the operation of sluice will be greatly affected.In this paper,a water conservancy project in Lu'an City is taken as an example.Its foundation soil consists of poorly graded gravel and backfilled gravel,and its bearing capacity does not meet the requirements,the backfilled soil settlement is large,the need for foundation treatment.In this paper,the dynamic compaction method is finally adopted for foundation treatment after scheme comparison and selection.After treatment,the measured bearing capacity and deformation modulus meet the design requirements,and the subsequent detection of foundation settlement is far less than the standard requirements,and the dynamic compaction treatment effect is remarkable.This study provides a reference for the subsequent foundation treatment design of similar projects.