基于蒙特卡罗法的预应力锚索支护深基坑的可靠度分析  

Reliability Analysis for Deep Excavation Retained by Prestressed Anchor Based on Monto-Carlo Method

作　　者：郑怡[1,2] 刘明[1] 沈小俊[3] 高飞[3] 张延年[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]大连理工大学土木水利学院,辽宁大连116024 [3]重庆市公路工程质量检测中心,重庆400060

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第3期433-436,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家十一五科技支撑计划重大项目(2006BAJ03A01-05);沈阳建筑大学结构工程省级重点实验室2007年度开放基金项目(JG200705);重庆交通大学结构工程重点实验室2007开放基金项目(CQSLBF-Y07-4)

摘　　要：目的对预应力锚索支护深基坑的可靠性进行分析,建立其稳定可靠度计算公式.方法介绍预应力锚索支护深基坑设计时的稳定性设计计算,以土的密度γ和抗剪强度指标黏聚力C、内摩擦角为基本随机变量,建立预应力锚索支护深基坑的稳定可靠度计算公式,采用蒙特卡罗法进行计算,应用Matlab语言编制了计算程序"RAPADES".结果建立了预应力锚索支护深基坑的稳定可靠性计算公式,结合实例计算预应力锚索支护深基坑的可靠指标,计算得可靠指标为4.32,满足规范安全要求.结论预应力锚索支护深基坑稳定可靠度计算公式合理、可靠,可为广大工程技术人员提供计算依据.Slide-resistant stability in deep excavation retained by Prestressed Anchor is analysed in order to establish its stability probabilistic calculation formula and supply engineering personnel with calculation basis. Calculation method of slide-resistant stability in deep excavation retained by Prestressed Anchor is introduced. Supposed γ C and Ф as the essential variations, the stability probabilistic calculation formula is established. The program ＂RAPADES＂, which is used to calculate reliability of deep excavation, is wrote by means of Matlab and on basis of Monte-Carlo method. Combining with a practical project, relax of reliability is 4.32, which meets codes. The calculated result is reasonable and reliable and it may supply engineering personnel with calculation basis.

关 键 词：预应力锚索 可靠度 安全系数 蒙特卡罗法 Matlab 

分 类 号：TU753[建筑科学—建筑技术科学]