降雨条件下阶梯状黄土边坡稳定性试验  

Stability characteristics test of multi-stairs-low highway cut slope in loess under a rainfall condition

作　　者：胡晋川[1] 谢永利[1] 王文生[1,2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]陕西公路勘察设计院,陕西西安710068

出　　处：《广西大学学报（自然科学版）》2010年第1期83-89,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家西部交通建设科技项目(200631881291)

摘　　要：为揭示黄土公路阶梯状高路堑边坡在降雨条件下的稳定性状,依托陕西某高速公路黄土路堑边坡工程,进行了现场试验和数值模拟,并通过离心模型试验,研究了阶梯状黄土高路堑边坡在降雨条件下的变形发展过程、坡面降雨入渗规律、涵水与护坡作用以及稳定性分析。研究结果表明:非饱和黄土阶梯状多级矮坡在降雨条件下,边坡的变形存在先垂直、后水平的特点,发生破坏前,会发生明显的侧向变形,在坡内很短距离无水平应变;一般降雨不会影响对阶梯状高边坡的整体稳定性;阶梯状路堑边坡能充分利用黄土的直立特性,来消除降雨对坡面的冲刷,最大限度地减少坡面产流,增加坡面的降雨入渗量;阶梯状路堑边坡还具有边坡防护、水分涵养与景观美化等功能,具有良好的工程和应用价值。Based on slope engineering of shaan-xi highway, the centrifugal model test, the numerical simulation and the stability analysis are carried out to study the stability characteristics of the multi-stairs-low highway loess slope under a rainfall condition. The development of deformation, the rule of rainfall infiltration, the function of water containing and slope protection, and stability analysis of the multi-stairs-low highway loess slope under a rainfall condition are studied deeply. The research results show that when the multi-stairs-low slope of unsaturated loess is under the condition of rainfall, the slope is deformed vertically first, then horizontally. There is no obvious lateral deformation before the destruction and no horizontal strain in a short distance. There is no influence on the stability of multi-stairs-high slope under the general rainfall condition. Using the upright characteristics of loess slope, multi-stairs-low slope can eliminate the surface erosion, decrease the runoff generation and increase the water infiltration. It has the function of water conservation and landscaping. It has good engineering and application value.

关 键 词：黄土边坡 阶梯状多级矮坡 稳定性试验 离心模型试验 

分 类 号：U416.14[交通运输工程—道路与铁道工程]