饱和砂土振动注浆的有限元模拟  

Finite element simulation on dynamic grouting in saturated sand

作　　者：雷金山[1] 阳军生[1] 杨秀竹[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《振动与冲击》2010年第9期235-237,共3页Journal of Vibration and Shock

基　　金：湖南省自然科学基金(07JJ3104)

摘　　要：在有限单元法基础上,考虑大位移大应变情形,采用套叠屈服面模型对饱和砂土振动注浆进行了数值模拟和分析。当振动荷载分别作用在孔底或孔壁上时,同一振动力随振动时间增长,残余孔压和峰值孔压均有所增加。振动力越大,历经同一振动时间的残余孔压和峰值孔压越大。当振动荷载作用持续一段时间,然后再施加注浆压力,发现孔壁中间节点径向位移达到最大值,向两端位移逐渐减小。Dynamic grouting in saturated sand was simulated with finite element method.During simulation,the covering and superimposing yield surface model was used and large displacements and large strains were considered.The results show that when the dynamic load acts on the bottom or the wall of grouting hole,both the residual pore water pressure and peak pore water pressure will increase.The more the dynamic load,the more the residual pore water pressure and peak pore water pressure.During dynamic grouting,the radial displacement of node in the middle of grouted section is the biggest and becomes smaller towards two ends.

关 键 词：有限单元法 饱和砂土 振动注浆 孔隙水压力 径向位移 

分 类 号：TU472.99[建筑科学—结构工程]