夯扩挤密碎石桩在液化地基处理中的应用  

Application of Ram-compaction Gravel Piles in Foundation Treatment for Liquefiable Ground

作　　者：白振江[1] 雷宇[1] 车传金[1] 耿运生 

机构地区：[1]南水北调中线干线工程建设管理局河北直管项目建设管理部,石家庄050035 [2]河北省水利水电第二勘测设计研究院,石家庄050021

出　　处：《南水北调与水利科技》2013年第B02期227-228,230,共3页South-to-North Water Transfers and Water Science & Technology

摘　　要：南水北调中线干线总干渠磁县段工程部分渠段地基土以砂土为主，饱和砂土具轻微一中等震动液化，不满足设计要求。为保证南水北调中线总干渠安全运行，采用夯扩挤密碎石桩对典型渠段进行试桩试验，并通过标准贯人试验、跨孔剪切波速试验及桩间土室内试验等多种检测方法对比分析了夯扩挤密桩等桩径不同桩间距下的液化地基处理效果，最终确定了夯扩挤密碎石桩桩径、桩间距及对应施工参数，为同类工程提供参考。Soil of part of the channel in Cixian county section of main trunk canal of the Middle Route Project of the South-to-North Water Diver- sion is sandy soil, as saturated sand with mild-moderate shake liquefaction, which can not meet the design requirements. In order to ensure the project＇s safe operation, the test pile is carried out by the ram-compaction gravel piles on the typical canals. Through the standard penetration test, cross-hole shear wave velocity test and indoor test of soil between piles and other detection methods, the comparison and analysis of the liq- uefied foundation treatment effects in various ram-compaction pile diameters has made to determine the dynamic compaction gravel pile diame- ter, pile spacing and the corresponding construction parameters to provide a reference for similar engineering.

关 键 词：夯扩挤密桩 液化地基 地基处理 

分 类 号：TV223[水利工程—水工结构工程] TV68