Around 1967, Shanghai has developed successful people don’t have to enter the small remote control of the soil pipe pressure type mechanical pipe jacking machine, there are more than 700 mm to 1050 mm diameter specifications. In their construction, through the railway, highway, there are also under the general road construction. The machine, all is a whole section cutting, unearthed by belt conveyor. At the same time, has used the hydraulic pressure correction system, and rectify the length of the cylinder out is with digital display.
Around 1978, Shanghai has successfully developed suitable for soft clay and silt clay extrusion method, pipe jacking, this approach requires the overlying soil thickness is larger (more than 2 times the pipe diameter), but higher than that of ordinary hand dug type pipe jacking construction efficiency more than 1 times. Grows more rapidly since the 1980 s, the pipe jacking construction technology, no matter in theory, or in terms of construction technology, has made considerable development.
Around 1984, Beijing, Shanghai, nanjing and other places of our country has started to introduce the foreign advanced mechanical pipe jacking machine, the pipe jacking technology in our country on a new step.
Especially in the Shanghai municipal company introduced Japan ise machine (ISEKI) of 800 mm diameter Telemale pipe jacking machine. Foreign theory, the pipe jacking construction technology and management experience into China, such as earth pressure balance theory, mud flat tube of various tests, and some related theories. At that time, caliber in 2 m of the reinforced concrete pipe of a forward distance of up to 120 m, after in 1988 and 1992 successfully developed China’s first multiple blade plate of soil pressure balance machine (DN2720mm) and the first mud soil pressure balance type machine (DN1440mm), satisfactory results were obtained.