Soil Pressure Balance Shield Construction Technology of Rich Limestone Stratum
In this study,taking the construction of water-rich karst high-strength limestone stratum in a shield section as an example,in view of the unfavorable geological conditions such as abundant groundwater,high hard-ness of limestone,and strong development of karst,the technical problems in the shield tunneling process were successfully solved by a series of technical measures such as optimizing the tunneling parameters,selecting ap-propriate tools,and improving the muck.In the construction,by optimizing the tool selection,the service life of the cutter is effectively extended and the tunneling efficiency is improved.In addition,the improved treatment of the muck further reduces the obstacles and risks during the tunnelling process.This study proposes a set of shield tunneling parameters applicable water-rich karst high-strength limestone strata,These pavameters not only en-sure the construction safety,but also significantly improve construction efficiency and increase economic benefits,which is of great significance for the technological innovation and development in the field of subway construc-tion.
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