To study the horizontal bearing behavior of the root type caisson foundation,the horizontal bearing capacity of the caisson is tested and the caisson is loaded by the slow load holding method in the test.

To study the vertical bearing behavior of the root type caisson foundation and to compare the bearing capacity of the foundation to that of the common caisson foundation,the degrees of the vertical bearing capacity improved by the root studs are investigated and the self-balanced load tests are made as well for both the vertical bearing capacity of the root type and common caisson foundations.

The caisson foundation construction of Changchun light railway cable-stayed bridge without back-stays;

By the formula of criterion,the safety factors of the stability against sliding and overturning are computed for one anchor caisson foundation.

Study on penetration resistance distribution characteristic of sunk shaft foundation;

The rebuilding scheme fully considers the harmony of the whole bridge with the surrounding environment, meets the planned traffic function requirements and the relative technical standards, puts forward the design of the steel composite beam structure for the main bridge and the technical measures taken for the sunk shaft foundation treat.

In this article, the author analyzes some aspects of false centers in construction of sunk shaft foundations such as formation, reasons and hazards, and states matters need attention in construction and prevention and correction measures.

This paper analysed stability and structural calculation of sunk well foundation and its application in the discharging sluice of Shuang Yanghe river.

Corresponding methods and techniques should be used to facilitate lowering the caisson foundation to the designed altitude in special geological conditions, because it may meet all kinds of geological conditions in the course of lowering the open caisson foundation.

The design of the open caisson foundation for a railway bridge across the Yellow River is introduced.

On basis of study of Rooted-caisson Foundations, by means of a series of the minor proportion\'s test of root anchorage foundation and FLAC 3D numerical simulation ,this paper sums up working mechanics and displacement of root anchorage foundation .