摘要
隧道工程“以排为主”的设计原则已不能适应当前水环境保护的要求,而完全封堵地下水又会使隧道衬砌难以承受巨大的水压力。从建立隧道工程与水环境的相互作用链出发,采用非稳定流法预测隧道衬砌前的涌水量,基于泰斯公式新的近似式预测洞顶含水层疏干漏斗的范围、体积和降深,基于地表水平衡方程确定恢复水环境的隧道衬砌允许渗水量,基于折减系数法计算隧道衬砌外水压力,进而归纳出“以堵为主”的“水环境平衡”的隧道设计原则,以防治洞顶水环境灾害和隧道水害,并以渝怀铁路圆梁山隧道做了算例。
In tunnel engineering, the strengthening water drainage as a design principle can not meet the demand of water environmental protection at present. However, it is difficult for the tunnel to endure huge water pressure when underground water is blocked up fully. By establishing interaction chain between tunnel engineering and water environment, the sluicing quantity of tunnel hole before lining is estimated with non-stable flow method. The scope, bulk, and deep draw-down of dewatering cone in aquifer above the hole are predicted. The permissible dewatering of tunnel lining for restoration of water environment is determined based on equilibrium equation of surface water, and the water pressure endured by tunnel lining is calculated based on discount coefficient method. In order to prevent and control water environmental hazard of ground above tunnel and sluicing hazard in tunnel a principle of 'water environmental balance' with choking up underground water is summed up as a leading principle in tunnel design. Finally, the Yuanliangshan tunnel of Yu (Chongqing) - Huai (Huaihua) railway was analyzed as a calculating example.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第1期121-127,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金项目(90202007)
