充填黄土压缩蠕变特性与湿陷性试验研究  

Study on the Filling Loess' Compression-Creep Behavior and the Collapsibility Test

作　　者：陈中伟[1] 张吉雄[2] 茅献彪[1] 巨峰[2] 刘旭东[3] 

机构地区：[1]中国矿业大学理学院,江苏徐州221008 [2]中国矿业大学矿业工程学院,江苏徐州221008 [3]太原煤炭气化总公司质量环保处,太原030000

出　　处：《地下空间与工程学报》2009年第1期54-59,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金重大项目(50490273);国家自然科学基金资助项目(50225414);中国矿业大学科技基金资助项目(2007B003)

摘　　要：利用美国MTS815岩石力学伺服试验系统，测得充填黄土在0～7．5MPa范围内的σ-ε曲线、压实度-应力曲线以及4种不同应力条件下的蠕变曲线；并根据不同应力条件下黄土的蠕变特征，回归了ησ-σ曲线及其方程。用双线法湿陷试验得到了黄土5种不同埋深条件下的湿陷系数筑与δs荷P的关系曲线，并对压实过程中黄土的湿陷机理进行了分析，总结了黄土的疋峰值δs埋深的关系曲线，得到了其回归方程。结合曹村煤矿的采矿地质条件，计算出了充填黄土的最大下沉量和最终压缩系数，为工程应用提供了依据。Using the USA MTS815 Rock Mechanics Test System, the σ-ε curve of the loess between compression ratio and stress in 0-7.5MPa, and the creep curves for four different stresses were gained in this experiment. Based on the creep characters of loess under different stresses, the ησ-σeurve and approximate equations were gained. According to the crewel method, the loess＇ collapsibility in five different depths was tested, and the δ, - P curve was obtained; then the collapsible mechanism of the loess was analyzed, the relationship between δ, ＇ s peak value and depth was summarized and the relation expression was also received. These results, combined with the mine geological conditions of the Caocun coal mine in Huozhou Coal--electricity Group, were applied to calculate the most sinking account and the end compression--coefficient of the filling loess. The conclusion offers great help in the engineering use.

关 键 词：充填黄土 压缩蠕变 湿陷性 试验研究 

分 类 号：TU444[建筑科学—岩土工程] TH137.52[建筑科学—土工工程]