By using of water table reduction technology at basic well points at construction site water table is reduced,specific difficult is solved in deep foundation ekcavation in coastal areas,In this article, construction and de-sign of basic well water table reduction technology are briefly introduced combining with geological properties hydrogeological conditions in coastal areas.

Considering the headframe base is influenced by freeze sinking, the paper points out the ways of arranging and observing the survey points of steel frame base's subsidence and deformation.

In the practice of freezing with several circles of holes the location of headframe base with freezing pipes is overlaid.

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.