Abstract:

The authors present the types of the diaphragm wall joints commonly used in China and NSBOX method used overseas. Taking the restoration works of Shanghai Metro Line 4 as an example, the authors present the difficulties in the joint construction, compare the types of the diaphragm wall joints and describe the related technical measures. The successful completion of the restoration works proves the feasibility of the crosssteel joint method in the construction of deep diaphragm walls in soft soils.

Key words: diaphragm wall, joint type, restoration works, crosssteel