深基坑工程安全评价的尖点突变模型  

A safety evaluation model of deep excavation project based on cusp catastrophe theory

作　　者：沈细中[1,2,3] 冷元宝[1] 兰雁[1] 张俊霞[1] 

机构地区：[1]黄河水利委员会黄河水利科学研究院,郑州450003 [2]水利部堤防安全与病害防治工程技术研究中心,郑州450003 [3]中国科学院武汉岩土力学研究所,武汉430072

出　　处：《哈尔滨工业大学学报》2009年第4期229-231,共3页Journal of Harbin Institute of Technology

基　　金：水利部公益性行业科研专项经费资助项目(200701022);科技部科研院所社会公益研究专项资助项目(2005DIB3J054);水利部“948”计划资助项目(200708).

摘　　要：为评价深基坑工程失稳的突变特征,采用突变理论建立了深基坑工程尖点突变安全评价模型.根据工程安全监控理论,引入突变理论,以基坑水平变形为例,考虑深基坑土体的流变特性,建立了基于时效影响因子的深基坑工程尖点突变安全评价模型.实例分析表明,尖点突变安全评价模型克服了采用常规设置监控值评价时参数选择困难,并能反映基坑失稳突变性的特点,可以量化评价基坑安全程度,正确评价安全状态,具有适应性强、精度高的优点.In order to evaluate the jumping destruction character of deep excavation, taking the level distortion of pit as example, a safety evaluation model of deep excavation was established based on safety supervision theory and cusp catastrophe theory with the consideration of creep character of soil based on time-effect factor of pit. Analysis of an example shows that the established model can overcome the difficulty in setting the supervising value, and can reflect the outburst destroy character of pit. Moreover, the model can exactly evaluate the safety degree in quantity and the character of safety, with the advantages of adaptability and precision.

关 键 词：深基坑 安全评价 尖点突变模型 

分 类 号：TU473[建筑科学—结构工程]