地下洞室安全监控分析模型探讨

STUDY ON ANALYTIC MODELS OF SAFETY MONITORING IN UNDERGROUND CAVES

结合小浪底安全监控软件系统的开发实际,对其中分析模型的有关技术问题进行初步研讨。该工程所建立的安全监控系统中配备有统计分析、一维分布、时序分析、混合性模型等模型。工程应用情况表明,各类模型建模过程中,都需要考虑解决时空效应及其耦合、库水位和气温因子的替代处理等基本技术问题。混合性模型建立中的有限元计算以二维弹塑性和粘弹性两种模式为主,对大型地下洞室时空效应等关键技术问题提出了相应的处理模式,可以直接应用于安全监测工程实际。

Based on the development of subsystem of Xiaolangdi safety monitoring software system, the paper discusses briefly technical problems related to the analytic models of the system. Statistic model, one-dimensional distributed model, time series analysis model and mixed model were established for structure behavior modeling and safety monitoring requirements. Engineering application practices demonstrated that for every above model, time-space effect and their coupling, the reservoir water level and atmosphere temperature factors and other essential technique problems must be considered with different ways for the large underground sttuctures in the modeling process in comparation with dam and other ground structures. In the system the FEM calculation involved mainly two-dimensional elasto-plastic and visco-elastic models is established. A specific calculation procedure for the time-space effect coupling of undergound structures was preprocessed. Above techniques and considerations can be applied and referenced for other underground structure safety monitoring systems.