突水突泥隧道段落围岩压力及整治措施

Pressure on Surrounding Rocks of Water Bursting and Mud Gushing Tunnels and Countermeasures

深埋隧道在施工过程中经常会遇到突水突泥段落,具有突发性、软弱性等特点,围岩压力对采取的加固措施、衬砌参数、预留清淤长度等有较大影响,但对其荷载大小的研究较少。通过资料调研分析确定了突水突泥段落围岩参数范围,并按跨度对我国不同时速单双线断面大小进行划分;通过普氏理论、太沙基理论以及谢家烋理论对突水突泥段落围岩压力进行计算,确定了不同跨度隧道对应的围岩压力,为隧道突水突泥整治提供参考,具有一定的指导意义。

During construction of deeply buried tunnels, water bursting and mud gushing section is a common issue, which happens abruptly and remains the weak link of the construction. It is clear that the pressures on surrounding rocks have major influence on the reinforcement measures, lining parameters and reserved dredging length, etc., while research on the pressure itself is comparatively rare. Based on investigation and research, the paper determines the parameter range of surrounding rocks of water bursting and mud gushing sections and classifies the tunnels with different cross sections of single/double track with different operation speeds according to different spans： then, the paper calculates the pressure of surrounding rocks of water bursting and mud gushing sections with Protodyakonov＇s mountain rock pressure theory, Terzaghi consolidation theory and Xie Jiaxiao theory and determines pressures on surrounding rocks of tunnels with corresponding spans, providing references for construction of water bursting and mud gushing section.