摘要
水位变化是影响带挡土墙路基稳定性的重要因素。考虑到水位的反复变化会引起路基土体抗剪强度减小,并使浸润线上、下土体强度不同。在此前提下基于Boussinesq方程确定边坡浸润线,利用GEO-SLOPE软件,结合浙西地区某国道线及附近的高速公路工程特征,研究了带挡墙路基的稳定性。分析表明,库岸路基边坡的稳定性与库水位变化幅度及变化速率有关;水位缓慢变化与骤然下降对路基产生的影响不同;路基边坡稳定性还与所采用的挡土墙形式有关。此外库水位的变化对挡土墙的抗滑移稳定性和抗倾覆稳定性也存在影响。
The variable water level is an important factor that affects the stability of the subgrade joined with retaining wall.Taking it into account that the repeated changes in the water level would cause decrease of the shear strength of subgrade soil,and difference between the soil strength below and above the phreatic line.Under this premise,the phreatic line of slope is determined on the basis of the Boussinesq equation.Using the software CEO-SLOPE, and combining the engineering features of certain national road and nearby expressway,the stability of the subgrade joined with retaining wall was studied.The results show that the overall stability of subgrade bank slope is dependent on the change range and rate of reservoir water level,the influence on subgrade is different between the slow changing and suddenly dropping of water level;the stability of subgrade slope also lies on the form of the retaining wall.The changes of reservoir water level influence the anti-slip and anti-overturning stability of retaining wall.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第A6期1262-1266,1271,共6页
Chinese Journal of Underground Space and Engineering
