Research purposes: The analysis are made for the purpose of seeking the key process,the technology and the method related to the safety of traffic and construction when conducting reconstruction of bridge and culvert base and on existing line and on second line with jacking method.

Study on bearing performance of rectangular closed diaphragm walls as bridge foundation under vertical loading;

Diaphragm wall-soil-cap interaction in rectangular-closed-diaphragm-wall bridge foundations;

The key technique for bridge foundation construction in plateau perma frost areas;

By using of numerical simulation, the load-carrying capacity of pier foundation and anchor-piles were also calculated after reinforcement.

Taking the second phase of Yuelong river engineering in Duanzhou zone as an example,the author illustrates its concrete construction process and design elements form abutment foundation construction,abutment construction and segmented deck construction,in order to offer related guidance for the construction and design of similar engineering.

Seismic response analysis for simplified bridge pier foundation;