石灰岩富水地区深基础处理中的高压注浆施工方法

在岩溶发育、水量丰富的石灰岩地区，宜采用高压注浆的堵水方法。堵水孔位应沿桩周边布置，采用４２５：普硅水泥；对地下水力联系密切的富水地段，宜采用一桩多孔、一孔多段、分段注浆的方法；对表部松散层，必须先施工止浆垫；每段停注压力必须大于２ＭＰａ。堵水后，成桩率达１００％。

High Pressure Grouting Construction Method for Deep Basis Treatment of Rich Water Limestone Area

In the limestone area with rich water,the botting water with high pressure gronting method must be utilized.The position of botted water hole must be arranged around the post and tbe used metrial is No.425 silicate cement.For rich water area connected with underground water must be utilization of the methods wbich are many boles around one post and many sections on one hole and grouting with separating section.It must be first to do stopping-grouting mat for soft surface layer and tbe pressure of stopping-grouting must be more than 2 Mpa.The successful rate of post is up to 100% after the water is botted