CAJ | 학술논문

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、坡面降雨人渗规律、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.
위게시황토공로계제상고로참변파재강우조건하적은정성상,의탁협서모고속공로황토로참변파공정,진행료현장시험화수치모의,병통과리심모형시험,연구료계제상황토고로참변파재강우조건하적변형발전과정、파면강우인삼규률、함수여호파작용이급은정성분석.연구결과표명:비포화황토계제상다급왜파재강우조건하,변파적변형존재선수직、후수평적특점,발생파배전,회발생명현적측향변형,재파내흔단거리무수평응변;일반강우불회영향대계제상고변파적정체은정성;계제상로참변파능충분이용황토적직립특성,래소제강우대파면적충쇄,최대한도지감소파면산류,증가파면적강우입삼량;계제상로참변파환구유변파방호、수분함양여경관미화등공능,구유량호적공정화응용개치.
Based on slope engineering of shaan-xi highway, the centrifugal model test, the numeri-cal 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 analy-sis of the multi-stairs-low highway loess slope under a rainfall condition are studied deeply. The re-search 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 deforma-tion 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 characteris-tics of loess slope, multi-stairs-low slope can eliminate the surface erosion, decrease the runoff gen-eration and increase the water infiltration. It has the function of water conservation and landscaping. It has good engineering and application value.