深厚表土地压误差对冻结壁厚度设计的影响  

Influence of the ground pressure error on theoretical design of frozen shaft thickness in deep thick soils

作　　者：徐志伟[1,2] 邵鹏[1] 商翔宇[1,2] 朱文心[1,2] 韩中阳 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2014年第4期606-611,共6页Journal of China University of Mining & Technology

基　　金：江苏省自然科学基金项目(BK2007040;BK2011212);国家自然科学基金项目(51009136)

摘　　要：为改进冻结壁厚度的设计方法,通过假设经验地压取值存在一定的误差限,对冻结壁厚度的经典弹性、弹塑性和流变理论设计进行了相应误差分析.结果表明:虽然冻结壁设计理论不断发展,但若地压取值存在误差,经典弹性模型、弹塑性模型和流变模型的冻结壁厚度相对误差也会超过10%,甚至20%.地压误差对冻结壁厚度理论设计的影响较大,甚至导致相应理论模型失效.由此可能造成深井造价大幅提高,并增加安全隐患和引发重大事故的可能性.In order to improve the design method of thick alluvial frozen shaft thickness, the er- rors of the classic elastic, elastic-plastic and rheological models used in the frozen shaft thickness design for coal mine shaft in deep and thick soils were analyzed. The analysis was based on the assumption that there be a certain error limit in ground pressure which mostly relied on the experience such as the ＂heavy liquid function＂ in common use. The results show that the veracity of ground pressure obviously affect the frozen shaft thickness design by using different models, hence the invalid of the models. The relative error of the frozen shaft thickness estimated by the classical elastic model, elastic-plastic models based on different different assumptions, and rheological model may exceed 10%, even 20%, which may result in more cost of deep shaft construction, safety incipient faults and heavy accidents.

关 键 词：深厚表土 冻结壁厚度 理论设计 误差分析 

分 类 号：TU411[建筑科学—岩土工程]