高压喷射灌浆技术在大坝防渗加固中的应用  

On the application of the jet grouting technique in the construction of the Longhekou Dam's diaphragm-wall

作　　者：徐有前[1] 

机构地区：[1]合肥工业大学土木建筑工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2003年第3期436-440,共5页Journal of Hefei University of Technology：Natural Science

摘　　要：高压喷射灌浆技术在病险坝防渗加固中得到广泛应用,龙河口水库大坝加固截渗墙的最大深度超过40m,现场进行了近9个月大规模的高压喷射灌浆试验。通过对常规三管法旋喷和摆喷试验成果和不足的分析,提出新三管法旋喷(高水压、高浆压)新工艺。通过钻孔取样、围井抽水和现场开挖等检验,新三管法旋喷获得成功,旋喷桩径较常规三管法有明显增大,桩间搭接良好。The jetgrouting technique has been widely used in the construction of the dam's diaphragmwall in China. In this paper,the insitu test of jet grouting in the construction of the Longhekou Dam's diaphragmwall is introduced. The depth of the diaphramwall is over 40 m and the test lasted nearly nine months. Based on the analysis of the test results and shortcomings of rotatingjetgrouting and swayingjetgrouting by the common threefluid method,here put forward is a novel threefluid method for rotatingjetgrouting under high water pressure and high mud pressure. By core drilling,pumping water from enclosedwell and insitu excavation, this novel method is proved to be successful. And the pile's diameter is evidently enlarged and the linking of piles has good quality.

关 键 词：大坝 高压喷射灌浆 截渗墙 三管法旋喷 摆喷 防渗 加固 渗流 

分 类 号：TV698.23[水利工程—水利水电工程] TV543