5. The high-pressure oil pipe has been tested at 105Mpa (1050Kgf/cm2) before leaving the factory. However, because the hose is prone to aging, users need to check the pipe jacking machine frequently, usually for six months, and for frequent users, three months. Use 87.5Mpa (875Kgf/cm2) to test pressure during inspection. If there is blasting, bulging, leakage, etc., it cannot be used. Pipe jacking machine 6. Strictly abide by the technical specifications during operation, and the user should check and maintain it regularly according to the use situation.

Preventive measures: Since there is no standard for foundation pit excavation in the soil layer, and the construction distance of the reverse waterproof casing method is long, the underground quicksand is more serious. Analyzing the operating conditions of the machinery and equipment at this stage, it is found that the main shaft of the engine is operating normally when there is no heavy load. Therefore, the same engine is used to push in the receiving well W30 in the reverse direction according to the coaxial line. After the connection is completed, the W29# well is jacked again, and the engine at the W30# well is pulled back. Pipe jacking machinery