Abstract The entrance section of the Baidingzi Tunnel on the Bazhong-Dazhou expressway passes through faulted rock masses. The design and construction schemes were discussed repeatedly by the related parties and modifications were made twice to eliminate the threats of falling rocks and collapse and to ensure the smooth completion of tunnel construction. Furthermore, the design principles of “preventing the rock from falling and collapsing, enhancing the advance support, highlighting monitoring, bearing the whole load, and installing heavy support” are finally summed up. Meanwhile, the safety of the primary support and secondary lining were analyzed and evaluated by the SDC software independently developed by the authors, providing a theoretic basis for determining the support parameters.
Abstract：
The entrance section of the Baidingzi Tunnel on the Bazhong-Dazhou expressway passes through faulted rock masses. The design and construction schemes were discussed repeatedly by the related parties and modifications were made twice to eliminate the threats of falling rocks and collapse and to ensure the smooth completion of tunnel construction. Furthermore, the design principles of “preventing the rock from falling and collapsing, enhancing the advance support, highlighting monitoring, bearing the whole load, and installing heavy support” are finally summed up. Meanwhile, the safety of the primary support and secondary lining were analyzed and evaluated by the SDC software independently developed by the authors, providing a theoretic basis for determining the support parameters.
2013, Vol. 50 