基于条分法原理的充填型岩溶蓄水构造突水突泥最小安全厚度  

Minimum safety thickness of water and mud inrush induced by filled-type karst water bearing structures based on theory of slice method

作　　者：李术才[1] 林鹏[1] 许振浩[1,2] 李利平[1,3] 郭明[1] 孙超群[1] 王旌[1] 宋曙光[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [3]南京水利科学研究院港口航道泥沙工程交通行业重点实验室,江苏南京210098

出　　处：《岩土力学》2015年第7期1989-1994,2002,共7页Rock and Soil Mechanics

基　　金：国家重点基础研究发展计划(973计划No.2013CB036000);国家自然科学基金面上基金(No.51479106);中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(No.SKLGDUEK1309);南京水利科学研究院港口航道泥沙工程交通行业重点实验室开放基金(No.YN914005)

摘　　要：首次将条分法引入到充填型岩溶蓄水构造突水、突泥研究当中,基于边坡稳定性分析的条分法原理,对隧道-岩溶充填物-岩溶管道系统进行了抽象概化,建立了充填型岩溶蓄水构造充填物条分解析计算模型。假设充填物在滑动面上各处均达到极限平衡状态,且在滑动面上的破坏服从Mohr-Coulomb破坏准则,通过力的平衡条件推导了充填型岩溶蓄水构造突水突泥的最小安全厚度计算公式,形成了一种求解充填型岩溶蓄水构造突水、突泥最小安全厚度的工程实用解析方法。该方法为岩溶隧道突水、突泥计算提供了一种新思路,计算结果与数值计算吻合性较好且符合实际工程情况,具有一定的理论研究与工程应用价值。In this paper, we propose a simplified analytical method for computing the minimum safety thickness of water and mud inrush induced by filled-type karst water bearing structures. The theory of slice method widely used to analyze the slope stability is applied to investigate the stability of the karst filling material. A simplified computational model is established for the complex system which consists of tunnel, karst filling material and karst conduit. In this model, it assumes that the stress of filling material along the surface to reach the state of limit equilibrium and the failure of filling material along the sliding surface to obey Mohr-Coulomb failure criterion. An equation is derived by using the equilibrium of forces to calculate the minimum safety thickness of water and mud inrush induced by filled-type karst water bearing structures, in which it is used for the application of the practical engineering problems. The results calculated by the proposed method are in good agreement with numerical simulations. It indicates that this method is applicable for the determination of the minimum safe thickness of water and mud inrush, which also provides an efficient way to explore the mechanism of water and mud inrush in karst tunnels.

关 键 词：条分法 充填型 岩溶 蓄水构造 突水、突泥 最小安全厚度 

分 类 号：U45[建筑科学—桥梁与隧道工程]