大型洞室群智能动态设计方法及其实践  

INTELLIGENT AND DYNAMIC DESIGN METHOD OF LARGE CAVERN GROUP AND ITS PRACTICE

作　　者：冯夏庭[1] 江权[1] 向天兵[1] 张春生[2] 吴世勇[3] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]中国水电工程顾问集团华东勘测设计研究院,浙江杭州310014 [3]二滩水电开发有限责任公司,四川成都610051

出　　处：《岩石力学与工程学报》2011年第3期433-448,共16页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划(973)项目(2010CB732006);国家自然科学基金雅砻江联合基金重点项目(50539090);中国科学院知识创新工程重要方向项目(KZCX2-EW-110)

摘　　要：针对复杂地质条件下高边墙、多洞交叉的大型洞室群多步开挖过程中的强卸荷特点,采用经验类比、数值分析、智能分析等方法的综合集成,提出复杂条件下大型洞室群稳定性分析、开挖过程与支护设计的智能动态设计方法。该方法以解决大型地下洞室群不同设计阶段稳定性需要解决的关键问题为目标,从地质条件的认识、地应力分布特征的把握、高边墙多洞室交叉的围岩变形破坏机制的理解到围岩稳定性评价、破坏模式识别、调控措施(开挖过程和支护方案)全局优化以及施工过程中的反馈分析与动态调整的系统全过程进行研究,论述地下洞室群修建前的初步设计方法和洞群修建过程中的动态最终设计方法。在锦屏二级水电站地下厂房设计与施工全过程的应用实践表明,该方法可以实现大型洞室群设计与施工的信息化、智能化和科学化。Focusing on characteristics of strong excavation unloading of high sidewalls of multi-cavern group under complicated geological conditions,an intelligent and dynamic design method is proposed for the stability analysis,design and construction of large cavern group.The method aims at the safe and economic construction for the large cavern group under complicated geological conditions.It considers the entire system＇s process from recognition of geological conditions,back analysis of in-situ stress field,understanding of deformation and failure mechanism of surrounding rock of large cavern group,stability analysis,global optimization of control measures of the stability such as excavation procedure and support parameters of cavern group,and dynamic adjustment of the excavation procedure and support parameters during the construction.The method has been in good practice of design and construction of underground powerhouse at Jinping II hydropower station.The results show that it is reliable information,intelligent and scientific method for design and construction of large cavern group.

关 键 词：地下工程 大型洞室群 动态设计方法 智能设计方法 锦屏二级水电站 稳定性 破坏模式 

分 类 号：TU91[建筑科学—建筑理论]