All thirteen excavation stages of a super deep foundation pit braced by rock-socketed diaphragm wall are simulated in this article using Drucker-Prager soil model and contact algorithm based on direct control method.

Combined with the large-diameter cylindrical rock-socketed continues diaphragm wall engineering fact,analysed and contrasted the deformation characteristic of the large-diameter cylindrical rock-socketed con- tinues diaphragm wall and the non-rock-socketed continues diaphragm wall by introducing three-dimension elas- to-plastic FEM and road-test method.

Batter piles adopt rock-socketed piles ofφ1.

These methods included combination piles with I shaped steel and PHC pipe, small steel pipe guiding, information construction and so on, successfully solved such problems as embedding depth, rock pressing, broken piles and so forth and got better effects.

In this paper ,some of the developments about side resistance of socketed pile in weak rock are presented.

Analyze bearing characteristics of socketed pile with new grey relationship theory model;

Analysis of load transfer of socketed piles by shear expansion theory;

Meanwhile,socketed depth of socketed pile is analysed through a typical example.

under static load test of the thick layer of alluvial cover karst areas bored piles bearing layer thickness and roof rock-socketed depth analysis and calculation,and its optimization.

With a lots of cases of piles foundation,the rock-socketed depth and safety thickness of cavities roof have been analysed and discussed.

Research on optimization design of rock-socketed piles;

Finite element analysis of size effect of rock-socketed piles;

A study on end bearing rock-socketed pile-tip resistance;