摘要
复杂地质条件下大型地下厂房区域地应力场的影响因素众多,且关系极为复杂,合理的地应力场分析和评价需要工程现场多源信息的综合研究。鉴于此,提出了大型地下厂房区域地应力场多源信息融合分析方法和思路,其典型特征为"基础信息融合-特征信息识别-决策反馈信息融合"3种层次的递进反馈式信息融合分析。依据这一方法和思路,探讨了官地水电站地下厂房区域的地应力场特征及其分布规律。分析认为,与现场开挖过程中所呈现的围岩卸荷破坏信息、监测信息、数值模拟信息以及实测地应力信息对比,均显示了所获得的工程区域初始地应力场是合理的。应用研究表明,所提出的地应力场多源信息融合分析方法是科学的和可行的,其成果为大型地下厂房动态优化设计和信息化施工过程中一系列关键问题提供了决策依据。
Owing to many influencing factors for in-situ stress field of large underground powerhouse region under complex geological condition, reasonable analysis and evaluation of in-situ stress field is need to integrated study about multi-source information of project site. In view of this, analytical methods and ideas of multi-source information fusion for in-situ stress field of underground powerhouse region are proposed. The typical characteristics of these methods are three-level progressive and feedback analysis of information fusion including integration of basic information, identifying of feature information, decision-making and feedback of information fusion. With the methods and ideas, characteristics of in-situ stress field of the underground powerhouse region at Guandi hydropower station and its distribution are investigated. The above results are compared with unloading damage information and monitoring information of rock mass observed in the process of site excavation, related information of numerical simulation, as well as in-situ stress measurements; it is shown that the initial stress field of the project area is reasonable. And then, the reasonableness and feasibility of the above analytical methods of multi-source information fusion for in-situ stress field are demonstrated. Finally, the analytical results from stress field can provide a basis for decision-making to a number of key issues in the process of dynamic optimization design and information construction of the large underground powerhouses.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2011年第7期2057-2065,共9页
Rock and Soil Mechanics
基金
国家自然科学基金(No.50909007)
水利部公益性行业科研专项项目(No.201001009)
"十一五"国家科技支撑计划项目(No.2008BAB29B01)
关键词
大型地下厂房
地应力
多源信息融合
分析方法
分布规律
large underground powerhouse
in-situ stress
multi-source information fusion
analytical methods
distribution law
