CAJ | 학술논문

降雨容易诱发地下水位上涨，从而引发多种危害。降雨诱发土体变形与渗流耦合，目前的研究多集中在土体耦合各场的变化规律，对土体水力耦合过程地下水位变化规律及影响因素研究较少。基于渗流理论、弹性理论及VG土-水特征曲线模型，建立了二维非饱土体的水力耦合的数值模型，从水力耦合的角度去研究降雨诱发地下水位上涨。该模型突破了饱和时的渗透系数是常量的局限，且适用于任意的土-水特征曲线表达式。通过算例对二维非饱和土渗流-变形耦合模型展开分析，并深入探讨了地下水位升高的耦合效应。计算结果表明：降雨强度、初始条件以及饱和渗透系数为变量等因素对地下水位上涨有显著的影响；位移最大值出现在地下水位以上，地下水位以下位移变化梯度相对较大。
강우용역유발지하수위상창，종이인발다충위해。강우유발토체변형여삼류우합，목전적연구다집중재토체우합각장적변화규률，대토체수력우합과정지하수위변화규률급영향인소연구교소。기우삼류이론、탄성이론급VG토-수특정곡선모형，건립료이유비포토체적수력우합적수치모형，종수력우합적각도거연구강우유발지하수위상창。해모형돌파료포화시적삼투계수시상량적국한，차괄용우임의적토-수특정곡선표체식。통과산례대이유비포화토삼류-변형우합모형전개분석，병심입탐토료지하수위승고적우합효응。계산결과표명：강우강도、초시조건이급포화삼투계수위변량등인소대지하수위상창유현저적영향；위이최대치출현재지하수위이상，지하수위이하위이변화제도상대교대。
Rainfall easily induces water table rising and leads to a variety of hazards.Infiltration and deformation are coupled during rainfall,while most of the current study focused on changes in seepage field and stress field and there are few studies on the water level and its influence factors.Based on the seepage theory, elastic theory and VG model,the two-dimensional hydro-mechanical model of unsaturated soil slopes was established.The water table rising was studied under rainfall condition based on the hydro-mechanical coupled theory.The model considered not only any soil-water characteristic curve,but also the variation of the coefficient of permeability at saturation.The two-dimensional hydro-mechanical model was analyzed through examples,and the coupling effect of water table change was deeply researched.The results indicate that the effects of rainfall intensity,initial conditions,and the saturated hydraulic conductivity have a great influence on the water table rising.The maximum displacement appear above the underground water level,the displacement gradient is bigger below the water table.