MECHANICAL CHARACTERISTICS OF FABRICATED TEMPORARY SUPPORT IN TUNNELS
The Xichengshan tunnel project of Zhuanglang-Tianshui highway is taken to study the mechanical prop-erties of prefabricated temporary support tunnel,in which the mechanical properties of steel arch and temporary sup-port with prefabricated temporary support tunnel are analyzed.A numerical model is established with half-step CD construction method,through which the mechanical properties of tunnel steel arch and temporary support in each construction step of half-step CD method,the maximum and minimum stress of tunnel steel arch,and the maximum and minimum displacement of prefabricated temporary support are obtained,providing a guidance for subsequent construction.
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