Construction method of drag reduction by long-distance small-diameter slurry balance pipe jacking grouting

• Main Authors: TIAN JINHU, XU YONGFENG, YANG XIUKUN, ZHANG TONGWEI, HAN XIAO, TAN YU, WEN JIE, ZHANG YI, ZHAO YONGTAO, LIU ZHENGGANG, ZHOU SHUDONG
• Format: Patent
• Language: Chinese; English
• Published: 18.12.2020
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

The invention provides a construction method of drag reduction by long-distance small-diameter slurry balance pipe jacking grouting. The construction method comprises the following steps of excavatinga jacking pit and a receiving pit, and providing a plurality of first jacking pipes and a plurality of second jacking pipes, wherein grouting holes are formed in the first jacking pipes; jacking a slurry balance pipe jacking machine from the jacking pit to the receiving pit along a pipe jacking construction position; mounting grouting pipes at the grouting holes of the first jacking pipes, jacking the first jacking pipes into the pipe jacking construction position from the jacking pit, and injecting slurry into the grouting holes when the first jacking pipes enter a stratum preset position soas to reduce drag; and along with tunneling of the slurry balance pipe jacking machine, jacking the second jacking pipes into the pipe jacking construction position from the jacking pit, and enablingthe second jacking pipes t