IMPROVEMENT OF HIGH PRESSURE ROTARY GROUTING TECHNOLOGY FOR STRENGTHENING FOUNDATION SOIL BY USING PRELIMINARY PITTING METHOD

The authors put forward a method of preliminary pitting in the foundation soil under new building to improve the high pressure rotary grouting techniques. They also discussed what geological conditions the method is suitable to. The calculating formula about constructing parameters was deduced. And by using this method, a foundation engineering project of new building become of high quality and good benefit.