秦岭输水隧洞主要断裂带对工程的影响

Impacts of the Main Fault Zones on the Construction of the Qinling Water Conveyance Tunnel

超长、深埋秦岭输水隧洞穿越秦岭岭脊,其断裂构造极其发育,工程区发育有几十条断层,其中有3条区域性大断裂对工程的影响最大。文章从构造学特征、运动学特征、组构特征、几何学特征等方面探讨了主要断裂带的特征;从断层活动性、岩石强度、岩体完整程度、结构面状态、地下水、主要结构面产状、物性参数等方面分析研究了断裂带对隧洞工程的影响。结果表明,围岩构造变形的构造学特征、运动学特征、组构特征、几何学特征及其变形形成机制可为预测围岩构造变形空间分布规律提供地质依据。通过对断裂带围岩基本工程特性进行综合评价,可优化隧洞围岩分类结果和衬砌支护参数,能够有效指导隧洞设计和施工。

The extra-long deeply buried Qinling water conveyance tunnel, located under the ridge of Qinling, passes through dozens of faults; of these faults, three regional faults have the greatest impact on the tunnel＇s construction. In this paper, the characteristics of the main fault zones are discussed from the aspects of tectonics, kinematics, fabric, geometry, etc,, and the relevant impacts on tunnel construction are studied based on fault activity, rock strength and integrity, structural plance condltion,underground water condition, occurrences of main structural planes and physical parameters. The results show that the characteristics of tectonics, kinematics, fabric, geometry and the formation mechanism of surrounding rock deformation can be used as a geological basis for predicting a spatial distribution rule. Through a comprehensive assessment of the engineering characteristics of rocks in fault zones, the surrounding rock classification and lining support parameters can be optimized, providing effective guidance for tunnel design and construction.