滇中引水工程香炉山深埋隧洞施工长距离通风研究

隧洞施工期通风是保障施工人员身心健康和地下洞室施工安全、高效进行的关键。根据国家和水利行业标准,并结合滇中引水工程香炉山隧洞施工方法等,确定了滇中引水工程香炉山隧洞施工期通风防尘卫生控制标准。考虑到香炉山隧洞总体施工方案和施工支洞布置,规划了隧洞施工期通风方案,通过供风计算分析,确定了隧洞各工作面的供风量、通风管直径及风机功率等。在此基础上,选择典型钻爆施工洞段和TBM施工洞段进行了数值仿真验算。计算结果表明:风管和隧洞内风速、通风量均达到了设计通风标准,隧洞内污染物稀释效果良好,验证了该工程通风设计方案的可行性和可靠性。

香炉山深埋长隧洞TBM选型研究

随着中国大规模基础建设的推进,越来越多的深埋长隧洞采用TBM施工,而TBM选型是TBM施工方案中关键问题之一。以滇中引水工程香炉山隧洞为例,重点从穿断层、软岩大变形、涌水突泥等不良地质洞段施工难易程度、卡机风险,以及超前加固和超前地质预报操作便利性等方面进行综合分析,推荐优先选用两台敞开式TBM,并针对具体地质情况、施工特点,提出了TBM相应的功能配置。研究成果可为类似工程提供借鉴。

深埋长隧洞不良地质风险勘察设计应对体系

复杂地质条件下深埋长隧洞施工时,不良地质风险是影响工程建设安全、进度、质量与投资的最大风险,应对不当往往会造成工期、投资的失控,严重时还会出现重大安全事故,造成生命财产损失等诸多负面影响。通过对以往工程经验和教训的总结,按照将风险控制提前的思路建立了深埋长隧洞不良地质风险应对体系。该体系立足于勘察设计角度,分总体规避、综合勘察、设计分析和风险控制4个层级。以滇中引水工程香炉山隧洞为例,通过执行该体系,达到了提前筹划风险应对措施,降低工程在安全、投资和工期等方面风险的目的。研究成果可为类似复杂隧洞工程勘察设计提供参考。

The scheme optimization on construction diversion with discharge control feature of upstream operational reservoir

There is a discharge control feature of construction diversion system with the upstream operational reservoir. The risk evaluation model of construction diversion is established by taking into consideration the risk factors of construction diversion system with discharge control feature as well as their composition. And the risk factors include the upstream operational reservoir discharge control, the interval flood and branch flood and the diversion system itself. And then based on analyzing of the conversion relation between risk index and investment index of diversion scheme, the risk control and conversion principals of diversion system are put forward, and the feasible diversion scheme model is built. At last, the risk and economic evaluation and scheme economic feasibility analysis method of diversion scheme are shown by an example of construction diversion scheme optimization with the discharge control condition of upstream hydropower station. The study is valuable for establishment and optimization of construction diversion scheme with upstream reservoir discharge control.