基于破碎带涌水预测的山岭隧道施工许可机制研究

发布时间：2018-09-11 09:43

【摘要】：突涌水事故是山岭隧道穿越各种破碎带时遭遇的主要地质灾害,建立隧道施工许可机制是减少损失和控制风险的有效途径。隧道施工许可机制是一个基于涌水量预测、地质预报、封堵加固措施、开挖方法、施工组织管理和综合评价的风险控制机制,是一个动态调控机制,只有当许可评价的风险在可接受的范畴内才可以施工,否则应调整施工措施,避免灾害的发生。首先,基于经典地下水理论建立涌水量计算模型,实现对隧道穿越破碎带可能涌水量的超前预测;针对待开挖的隧道,基于综合超前地质预报技术体系,实现对掌子面前方待开挖破碎带的规模、空间展布和岩体特征的精确预报;然后,将地质预报和涌水量预测结果同拟采用的封堵加固措施、开挖方法、施工组织管理等因素共同构成施工许可的评价指标,通过综合评价方法判定施工的风险,确定施工的安全性;最后,将此方法应用于泰宁隧道穿越F2破碎带的施工中,根据评价结果,确保隧道安全通过此破碎带。基于破碎带涌水预测的施工许可机制在隧道突水预测与灾害控制方面具有明显作用,其分析结果相对准确可靠,具有广泛的应用前景。
[Abstract]:Water gushing accident is a major geological disaster encountered by mountain tunnels crossing various fractured zones. Establishing tunnel construction permit mechanism is an effective way to reduce losses and control risks. Risk control mechanism is a dynamic control mechanism. Only when the risk of permission evaluation is acceptable can construction be carried out. Otherwise, construction measures should be adjusted to avoid disasters. Based on the comprehensive advanced geological prediction technology system, the excavated tunnel can accurately predict the size, spatial distribution and rock mass characteristics of the fractured zone to be excavated in front of the face. Then, the geological prediction and water inflow prediction results are combined with the proposed measures of plugging and strengthening, excavation methods, construction organization and management to form the construction permit. Finally, the method is applied to the construction of Taining Tunnel across the F2 fractured zone to ensure the safe passage of the tunnel through the fractured zone. The mask has obvious effect, its analysis result is relatively accurate and reliable, and has wide application prospects.
【作者单位】：中国地质大学工程学院;三明市交通建设集团有限公司;
【分类号】：U455.4

【相似文献】