Stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing

• Main Authors: TANG WEI, LI DECHANG, ZHANG JIQING, WANG LINUAN, SUO XIAOMING
• Format: Patent
• Language: Chinese; English
• Published: 11.05.2016
• Subjects: EARTH DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; GALLERIES; HYDRAULIC ENGINEERING; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; SOIL SHIFTING; TUNNELS; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a stratum reinforcing method matched with shield long-distance tunneling normal-pressure tool changing. In a water-rich sandy gravel stratum, surface bored piles and inter-pile grouting reinforcing are adopted for reinforcing and improving the stratum near the shutdown tool changing position to improve the stability and density of the stratum. Then, a maintenance work well with the diameter of 2 m is arranged at the position, in front of a shutdown tool plate, within the stratum reinforcing range and serves as a work space, and tool plate maintenance and tool changing can be achieved in the shield long-distance tunneling process of the water-rich sandy gravel stratum. It is verified through engineering practice that shield tool plate maintenance and tool changing can be achieved in the water-rich sandy gravel stratum through the method, the construction process is simple, high in operability, safe and reliable, engineering investment can be reduced, tool changing work efficiency can be