摘要
分析2012年颁布实施的与1999年实施的《建筑基坑支护技术规程》中不同土压力计算方法对基坑支护设计的影响.选用某工程实例,对不同土压力分布下,支护桩的弯矩、剪力、位移及整体抗倾覆安全系数进行计算和分析比较.然后采用Monte Carlo可靠度方法分析两种不同土压力分布作用下,支护结构的抗倾覆稳定性.利用Matlab语言编写计算程序,分析土压力计算方法的改变对基坑支护可靠度的影响.计算结果表明:土压力按三角形分布计算出的抗倾覆稳定系数减小较大,但两种方法计算的可靠度相差很小,说明采用新规范的计算方法在保证了基本稳定性的同时,对工程安全性提出了更高的要求.
The different soil pressure calculation methods in the technical regulations published in 1999 and in 2012 for retaining and protection of building foundation excavation have different impact on the foundation pit de- sign. In a case of foundation pit were elected ; the moment, shear, displacement and resistive overturning safety factor of retaining piles are all calculated and so do the comparatively analysis under two kinds of different earth pressure distribution. Finally, Monte -Carlo method is adopted to conduct the stability against overturming sta- bility of supporting structure safety factor in two kinds of soil pressure distribution. The calculation program is compiled by Mat lab language. The program is to analyze the reliability of foundation pit under the two ways of earth soil pressure. The results show that resistive overturning safety factor, which calculated by the new standard reduced more, but the reliability difference calculated by two methods is very small, the results indicate that the new calculation method ensures both stability and higher requirements for the safety of engineering.
出处
《昆明理工大学学报（自然科学版）》
CAS
2017年第3期96-100,共5页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金联合基金项目(U1502232)
教育部博士点基金项目(20135314110005)
十四冶建设云南勘察设计有限公司基金项目(201506029
201506021)
关键词
土压力
技术规程
可靠度分析
抗倾覆安全系数
earth pressure, technical specification, reliability analysis, resistive overturning safety factor
