松散堆积土中的隔水层对边坡稳定性的影响.pdfVIP

44 10 浙 江 大 学 学 报() Vol.44 No. 10 2010 10 Journal of Zhejiang University ( Engineering Science) ct. 2010 D I: 10.3785/j.issn. 1008973X.2010. 10.029 1 2 3 2 孙红月, 吴红梅 , 李焕强 , 尚岳全 ( 1. , 310058;2. , 310058; 3., 310006) : ,. ,, . ,, , ., ,,, , , . :; ;; : TU 457 : A : 1008973X( 2010) Influence to slope stability caused by impermeable layer in loose deposited soil 1 2 3 2 SUN Hongyue , WU Hongmei , LI Huanqiang , SHANG Yuequan ( 1. Dep ar tment of Ocean Sc ience and E ng ineer ing , Zhej iang Univ ers ity , H angz hou 310058, Ch ina; 2. Co eg e of Civ i E ng ineer ing and A r chitectur e, Zhej iang Univ er sity , H angz hou 310058, China; 3. Zhej iang P r ov inc ia P an D esig n and R esearch I ns titute of Communications , H angz hou 310006, China) Abstract: Many landslide cases by geological investigation showed that the effect of impermeable strata was important in sliding process. A slope model including an impermeable stratum was constructed to simulate the action of rainfall and groundwater infiltration from slope back edge in order to reveal the influence mechanism of impermeable strata. Simulation results showed that the rainfallinfiltration mainly affected the soil above the impermeable stratum, including the quick increasing of water content, soil deformation, and the rapid enhance of thrust force at slope toe. The soil below the impermeable stratum was not affected. T he groundwater infiltrated into the stratum under impermeable layer at back edge only affected the water content and the pore pressure