A new driven cast-in-place Y pile,developed according to the innovative design concept of Y pile and the traditional construction technology of driven cast-in-place pile in China,was introduced in this paper.

Field experimental study of mechanical performance of Y-shaped vibro-pile reinforced embankments

The load transfer mechanism of Y-shaped vibro-pile in construction and preloading periods of embankment is adequately studied by reinforcement metre.

The section of Y-shaped vibro-pile is complicated;its geometric characteristics has four independent variables and eight integral zones.

The common quality problems in sinking pipe cast-in-place pile and the preventing steps;

Analysis and treatment for an accident of driven cast-in-place pile foundation;

Vibratory driven cast-in-place pile technology;

Base on two concrete engineering examples,the author came to the conclusion that a large number of piles broken in driven cast-in-place pile are due to the incorrect digging of foundation pit late.

Common quality defects of pipe sinking cast-in-place pile and control measures;

Based upon analysis of some questions encountered in construction of vibrator pipe sinking cast-in-place pile discussion is made from general situations of engineering, pile toe molding and other aspects.

In this paper, the reasons of appearing construction quality problems of driven cast in place pile had been analysed, and the specific measures for solveing these problems had been put forward, The new construction techniques of driven cast in place pile had been intraduced, Based on these, and now the new construction techniques of driven cast in place pile is better, Suggest to use the new one.

The engineering geological conditions of Yandong Sewerage Treatment Plant in the Economic and Technical Development Zone of Ningbo City are described as well as the design of driven cast in place pile foundation.