沼泽湿地陷落体救助拉拔模型试验研究  

STUDY ON DRAWING MODEL OF SLUMPING SALVAGE IN SWAMPY LAND

作　　者：李丽华[1,2] 陈轮[1] 田行健[1] 邵庆春[3] 陈国双[3] 

机构地区：[1]水沙科学与水利水电工程国家重点实验室清华大学,北京100084 [2]武汉大学土木建筑工程学院,武汉430072 [3]中国科学院东北地理与农业生态研究所,长春130012

出　　处：《工程力学》2009年第3期202-206,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(50578086)

摘　　要：设计了陷落体救助模型系统,进行了沼泽湿地陷落体救助室内试验研究,对救助拉拔过程进行了初步的探讨。结果表明,陷落体救助拉拔的阻力主要来自底盘负孔隙水压力,远大于侧壁阻力。拉拔速度和静置时间是影响负孔隙水压力的主要因素。负孔隙水压力大小随拉拔速度和静置时间的增加而增大。拉拔速度越大,负孔压分布就越不均匀。静置时间越长,增加幅度越大。A drawing model of slumping salvage was designed, and a preliminary analysis on drawing salvage is performed through slumping salvage tests in swampy land. Test results show that the salvage resistance is generated by the negative pore water pressure, which is larger than the resistance force on the side. Drawing speed and stewing time of the swampy soil are two main influencing factors of the negative pore water pressure. The absolute value of the negative pore water pressure increases with the increase of drawing speed and stewing time. The larger the drawing speed, the more non-uniform the distribution of negative pore water pressure. The longer the stewing time, the larger the amplitude increment of the negative pore water pressure.

关 键 词：沼泽土 陷落体救助 拉拔 负孔隙水压力 静置时间 

分 类 号：TU43[建筑科学—岩土工程]