Research on Construction Safety Control Technology of Ultra-small Spacing Parallel Shield Tunnel
In order to solve the technical problem of safe tunneling in ultra-small spacing parallel shield construction,based on the Fenghong section tunnel project of Suzhou Metro Line 7,aiming at the problem of ultra-small spacing interaction,a new protection system for small spacing parallel shield construction is innovatively adopted,which is"MJS interlocking isolation wall+radial deep hole grouting in tunnel+synchronous support of tunnel first+mud effect grouting outside shield later".A synchronous balance roof support system with servo precise control,automatic walking,large angle climbing and small curve turning function was independently developed.The external load,horizontal displacement of interlayer soil,segment convergence and pipeline settlement were monitored and analyzed,and the variation law and influence range of parallel crossing additional load and horizontal displacement of interlayer soil under different conditions were revealed.Finally,the safety control of ultra-small spacing parallel shield construction is realized.
NETL
NSTL
万方数据
