摘要
长大隧洞穿越不良地质洞段,遇断层易发生涌水、涌砂、蚀变砂等复杂地质情况,应用超前地质预报、水砂分治、递进灌浆、置换松散体、分层开挖等施工技术是隧洞修建成功的关键。文中通过对桓清2号隧洞不良地质洞段涌水、涌砂及蚀变砂等问题的分析,提出富高压水蚀变砂洞段超前地质预测、水砂分治导水卸压、微扰动固砂、围岩破碎带多种材料梯阶递进式灌浆、回填混凝土置换破碎松散体阻水防塌、富高压水蚀变砂段分层开挖强支护等施工技术措施,为同类工程施工提供一定的参考。
The long tunnel passes through the bad geological section,the fault is prone to the occurrence of water gushing,sand gushing,alteration sand and other complex geological conditions,the application of advance geological prediction,water sand separation control,progressive grouting,displacement of loose body,stratified excavation and other construction technologies is the key to the success of the tunnel construction.Based on the analysis of water gushing,sand gushing and altered sand in the bad geological section of Huanqing No.2 tunnel,The construction technical measures such as advanced geological prediction of the high pressure water alteration sand cave section,water and sand separation control,water and pressure relief,microdisturbance sand consolidation,progressive grouting of various materials in the broken zone of surrounding rock,backfilling concrete replacement of broken loose body water resistance and collapse prevention,and strong support of layered excavation in the high pressure water alteration sand section are put forward,which provide a certain reference for the construction of similar projects.
作者
石瞳希
丁继辉
SHI Tong-xi;DING Ji-hui
出处
《东北水利水电》
2023年第5期14-18,71,共6页
Water Resources & Hydropower of Northeast China
基金
国家自然科学基金项目(51879074)
辽宁省重点输供水工程项目。
关键词
不良地质洞段
蚀变砂
地质预报
水砂分治
递进式灌浆
bad geological section
altered sand
geological forecast
water sand separation control
progressive grouting
