多舱顶管端头工作井MJS加固技术及其应用效果分析OA

In jacking engineering,the effective reinforcement of the local soil at the end well is an important guaran-tee for the successful implementation of the crossing project.The reinforcement project by MJS of the end well of the utility tunnel of Danxia road adjacent to Nanchang city are taken as an example.Through on-site condition analysis,drilling core detection,and numerical simulation calculation,the reinforcement effect of the MJS method on the end working well at the large cross-section of multi pipe jacking engineering is analyzed.The results show that the MJS construction method pile is used to distinguish the strong and weak reinforcement areas and the local wedge rein-forcement scheme for the multi-cabin large section pipe jacking end shaft fully meet the safety and quality require-ments of the project.The existing subway tunnel structure under the pipe jacking project has high requirements for the control of the surrounding soil construction disturbance.But the existing reinforcement scheme has a significant effect on the control of the surrounding stratum displacement.This reinforcement plan has guiding significance for the design and construction of similar projects.