As a Foundation Machinery, the diaphragm wall grab used of drilling equipment to form a slot and built into the structural stiffness can play a good supporting role, suitable for all kinds of geological conditions, and can be used as a main part of the underground construction, saving construction cost, simplify the construction process, construction effect, small pollution.
It was first used in Italy. In 1950s, Italy adopted the pile type diaphragm wall. Then in the western it got rapid promotion, in 1959, spread to Japan, which have been greatly developed, Japan is currently the world's most populous country with continuous wall, to deal with the Pacific Island earthquake. In China in Miyun reservoir engineering for the first time uses of Diaphragm Wall Grab technology for impervious structure.
