Introduced an example of treatment of prestressed concrete pile's breaking and utilize the breaking pile successfully, by methods of pile of low-strain dynamic test, pile of static test, high pressure grouting, geological prospecting.

In this paper, the author analyses the cause of cast\|in\|place pile foundation breaking, based on the cast\|in\|place pile foundation building in Zhuanglang River Bridge at Yongdeng, G312 road, and discusses the treatment, scheme and theoretic computation method of the breaking pile.

Whereas, problems like sloping pipe-pile, spiral pile and breaking pile usually emerge due to the influence of construction technology as well as geological conditions in the process of piling, leading to a normal sinking pile out of work.

Treatment method of broken piles in construction process of cast-in-place bored pile;

The treatment and prevention of broken pile of the bored cast-in-situ pile;

On the preventions of broken pile among the bored piles in the He-Da Highway Construction;

Prevention for pile breaking of ferroconcrete pouring pile and its treatment;

Prevention of underwater cast-in-situ concrete pile breaking and its processing

Analysis on broken stake questions of cast-in-place bored pile;

This article puts forward material measures for defending and dealing wits emergeny to the most harmful accidents such as collapsing bore , burying drilling, blocking drilling, crinkle drilling, oblique drilling, bending drilling, broken stake, nipping mud through construction of rinsing affusing drilling stake construction.

The quality problems of contracted neck and broken stake in deep tube perfusion stake construction of high building are discussed and how to have a quality test and control on stake is dealt with at length.