【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。更多还原

【Abstract】 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.更多还原