软土地区某水闸基础加固研究

Foundation Reinforcement of A Sluice in Soft Soil Area

某水闸存在深厚软土层,地基处理采用水泥搅拌桩复合地基,检测时发现部分区域搅拌桩存在质量问题,下部不成桩。通过计算分析和综合考虑,设计采用静压预应力管桩进行基础加固。施工前进行了试桩和静载试验,并根据试验结果采用泡沫垫层等对加固方案进行了调整。通过监测资料可知,加固区的沉降与计算沉降基本一致,和非加固区的沉降协调较好,很好地达到了预期的加固效果,对用管桩加固软基水闸基础有很好的参考价值。

A sluice is located in the thick soft soil layer, and the foundation of the sluice is treated with mixing piles.It is found that the pile can not form in the detection of stake-base.The method of strengthening foundation using pressed-in piped piles has been taken into account when designing and analyzing.The method has been added foam cushion after getting the experimental parameters by testing pile and static test.The measuring settlement of reinforce area is close to the calculation by comparing monitoring data.The deformation compatibility condition between reinforce area and non-reinforce area are well.The expected good result is reached, and it has a good reference value on similar projects.