振冲碎石桩处理饱和粉砂液化土层的应用研究

Application of Vibroflotation Gravel Pile in Saturated Silt Liquefaction Soil

饱和粉砂液化土层地基的治理,在工程建设中十分重要。针对某拟建水质净化处理厂工程的饱和粉砂液化地基,采用振冲碎石桩复合地基处理方法,进行了大量现场试验研究工作。试验桩施工结束后,通过采用单桩复合地基静载试验、重型动力触探试验及标准贯入试验等原位测试方法,对碎石桩处理后的复合地基承载力、桩间土液化情况及桩体密实度进行检验和评价,取得了科学可靠的试验数据,从而对相似工程的地基处理具有一定的借鉴意义。

The treatment of saturated silt liquefaction soil foundation is very important in engineering construction.In view of the saturated silt liquefaction foundation of a proposed water purification plant project,a large number of field tests were carried out by using vibroflotation gravel pile composite foundation treatment method.After the completion of the test pile construction,through the use of single pile composite foundation static load test,standard penetration test and heavy dynamic penetration test and other in-situ test methods,the bearing capacity of composite foundation,soil liquefaction between piles and pile compactness after gravel pile treatment are tested and evaluated,and scientific and reliable test data are obtained,so as to provide reference for similar engineering foundation treatment.