CAJ | 학술논문

采用FLAC3D对预应力锚索框架梁支护的岩土边坡施工过程进行数值模拟，围绕施工中坡体位移场与应力场的变化以及下级边坡施工对上部已完成的支挡结构受力影响进行研究。结果表明：坡体开挖引起的松弛区呈圆弧状，且位移由临空面向坡体内逐渐减小，坡体弹性模量与其变形呈非线性递减关系；预应力锚索框架梁能有效抑制坡体变形，从坡顶到坡脚锚索轴力依次增大，故工程设计中宜对其分别设计，做到“强腰固脚”；下级边坡与上级边坡的支挡结构相互约束，共同承担滑坡推力，形成一种“联合支挡结构”。
채용FLAC3D대예응력묘색광가량지호적암토변파시공과정진행수치모의，위요시공중파체위이장여응력장적변화이급하급변파시공대상부이완성적지당결구수력영향진행연구。결과표명：파체개알인기적송이구정원호상，차위이유림공면향파체내축점감소，파체탄성모량여기변형정비선성체감관계；예응력묘색광가량능유효억제파체변형，종파정도파각묘색축력의차증대，고공정설계중의대기분별설계，주도“강요고각”；하급변파여상급변파적지당결구상호약속，공동승담활파추력，형성일충“연합지당결구”。
FLAC3D software is used to simulate the construction process of rock soil slope and prestressed anchor and frame beam are applied to reinforce it. Changes of displacement field and stress field during the construction of the slope and influence of the construction of lower slope on the loading of existing upper slope are studied. The results show that relaxation zone caused by cutting slope is an arch in shape;the displacement decreases gradually from slope face inwardly, while elastic modulus decreases with deformation,which reflects a nonlinear relationship. Considering that prestressed anchor and frame beam can effectively pre?vent the slope deformation and the axial force from slope top to foot increases in turn, it should be designed respectively in engineer?ing and the reinforcement measures should be taken on the lower part of the slope, because the lower structure and upper structure are bound to each other and bear landslide thrust together, thus forming a united retaining structure.