武汉工业学院学报
武漢工業學院學報
무한공업학원학보
JOURNAL OF WUHAN POLYTECHNIC UNIVERSITY
2013年
4期
63-68
,共6页
膨胀性黏土%边坡稳定性%FLAC3D%数值模拟
膨脹性黏土%邊坡穩定性%FLAC3D%數值模擬
팽창성점토%변파은정성%FLAC3D%수치모의
expansive clay%slope stability%FLAC3D%numerical simulation
以安徽省北沿江高速公路(马鞍山至巢湖段)的膨胀性黏土边坡为对象,通过分析边坡变形失稳特点探究了此类边坡变形失稳机理,并基于FLAC3 D软件针对某典型边坡开展了边坡稳定性的数值模拟分析。分析结果表明:该类膨胀土边坡失稳受水作用影响显著,膨胀性黏土遇水膨胀,且强度参数折减程度较大,膨胀土路堑边坡浸水后的破坏主要是发生在坡面浅层,且浸水程度愈深,边坡稳定系数愈低,这表明膨胀土路堑边坡的稳定性受浸水湿化效应的控制,通过在坡脚设置支挡工程防护,使得坡体的水平位移发生了显著的减小,加强了坡体的整体稳定性。
以安徽省北沿江高速公路(馬鞍山至巢湖段)的膨脹性黏土邊坡為對象,通過分析邊坡變形失穩特點探究瞭此類邊坡變形失穩機理,併基于FLAC3 D軟件針對某典型邊坡開展瞭邊坡穩定性的數值模擬分析。分析結果錶明:該類膨脹土邊坡失穩受水作用影響顯著,膨脹性黏土遇水膨脹,且彊度參數摺減程度較大,膨脹土路塹邊坡浸水後的破壞主要是髮生在坡麵淺層,且浸水程度愈深,邊坡穩定繫數愈低,這錶明膨脹土路塹邊坡的穩定性受浸水濕化效應的控製,通過在坡腳設置支擋工程防護,使得坡體的水平位移髮生瞭顯著的減小,加彊瞭坡體的整體穩定性。
이안휘성북연강고속공로(마안산지소호단)적팽창성점토변파위대상,통과분석변파변형실은특점탐구료차류변파변형실은궤리,병기우FLAC3 D연건침대모전형변파개전료변파은정성적수치모의분석。분석결과표명:해류팽창토변파실은수수작용영향현저,팽창성점토우수팽창,차강도삼수절감정도교대,팽창토로참변파침수후적파배주요시발생재파면천층,차침수정도유심,변파은정계수유저,저표명팽창토로참변파적은정성수침수습화효응적공제,통과재파각설치지당공정방호,사득파체적수평위이발생료현저적감소,가강료파체적정체은정성。
Choosing expansive clay slope which along the north side of Yangtze river highway in Anhui Province as an object , through analyzing the characteristics of slope deformation and instability to explore the mechanism of in -stability for such slope ,we carried out numerical simulation analysis of slope stability for a typical slope based on FLAC3D software.The analysis results show that:Firstly, the instability for this type of expansive clay slope is af-fected by the action of water insignificantly ,the expansion of swelling clay is according to the influence of water , and the degree for reduction of strength parameters is large .Secondly ,the destruction of expansive soil cutting slope after flooding occurred mainly in shallow slope ,and slope stability factor is lower when the level of its immersion in water is deeper .This indicates that the slope stability of expansive soil cutting was controlled by effects of flooding . Lastly , by setting retaining engineering protection at the foot of the slope , the horizontal displacement of slope is re-duced remarkably ,and the overall stability of the slope is has been strengthened .