CAJ | 학술논문

采用有限元软件ABAQUS对由降雨引起的城市道路路基渗流场进行数值模拟。在降雨量一定的情况下，根据采用和不采用防渗措施时路基中饱和度和含水量的分布，分析降雨强度、土工膜防渗以及防渗深度对路基中水分分布及迁移的影响，并探讨土工膜防渗对控制城市道路膨胀土路基胀缩变形的意义。分析结果表明：降雨强度越低，雨水入渗引起的路基含水量变化量越大，沿路基横断面分布越不均匀；土工膜防渗以后，路基受降雨的影响明显下降，随着防渗深度的增加，降雨对路基中含水量分布的影响显著减小；防渗可控制降雨引起的膨胀土路基膨胀变形的发展。
채용유한원연건ABAQUS대유강우인기적성시도로로기삼류장진행수치모의。재강우량일정적정황하，근거채용화불채용방삼조시시로기중포화도화함수량적분포，분석강우강도、토공막방삼이급방삼심도대로기중수분분포급천이적영향，병탐토토공막방삼대공제성시도로팽창토로기창축변형적의의。분석결과표명：강우강도월저，우수입삼인기적로기함수량변화량월대，연로기횡단면분포월불균균；토공막방삼이후，로기수강우적영향명현하강，수착방삼심도적증가，강우대로기중함수량분포적영향현저감소；방삼가공제강우인기적팽창토로기팽창변형적발전。
Seepage field of urban road subgrade induced by rainfall was numerically modeled by finite element method ABAQUS .For given rainfall ,based on distribution of saturation degree and water content in subgrade with and without anti‐seepage measures ,influence of rainfall intensity ,anti‐seepage of geomembrane and the impermeable depth on distribution and migration of moisture in subgrade was analysed .The meaning of anti‐seepage of geomembrane on the control of swell‐shrink deformation of expansive soil subgrade of urban road was also discussed .Analytical results show that the lower the rainfall intensity ,the greater the variation of water content in subgrade due to rainfall infiltration is ,and the more uneven the distribution of it along cross section of subgrade is .With anti‐seepage of geomembrane ,the influence of rainfall on subgrade is obviously decreased .As the depth of anti‐seepage is increased ,the influence of rainfall on the distribution of water content in subgrade is significantly reduced .Anti‐seepage can control the development of swelling deformation of expansive soil subgrade subjected to rainfall .