Seismic safety evaluation prescribes three patterns of input surfaces for deep soft sites in the work of II.

Numerical simulation on vertical stability critical height of variable cross section drilling shaft in deep alluvium;

Experimental study on high strength composite shaft lining in deep alluvium;

Through the construction example, the paper introduces lectotype problems of underpinning in the pile foundation reinforcement under geological conditions of deep soft soil layer and briefly states the method for correcting a deviation in the frame structure.

Stability of a shaft in thick and deep surface soil is studied when a bottom aquifer of Quaternary System is feeding water to Haizi Mine in Huaibei.

According to Jinqiao mine auxiliary well surface soil s floor pour plasm reinforce and the introduce of wall of a well strain observation technology, this paper analyzed wall of a well s safety assurable technology during the pour plasm, and it put forward synthetic technique development way of deep surface soil breaking wall of a well.

This article introduces the construction of main shaft freezing methods in Jixi,which takes some measurements and gains better results in order to pass the deep clay layers safely.