基于刚性桩加筋复合地基边桩加固的几种方法

发布时间：2018-04-04 08:23

本文选题：刚性网格　切入点：刚性桩加筋复合地基　出处：《施工技术》2017年S1期

【摘要】：在软土上的厚路堤,在较大的侧压力作用下,路堤填土顶部至路基内边桩上部会产生一个潜在破坏面。利用大型通用有限元软件MIDAS/GTS,建立有持力层情况下刚性桩加筋路基和刚性网格-桩加筋路基模型,分别分析刚性桩加筋路基、局部增加刚性网格梁、边桩加密、既局部增加刚性网格梁又加密边桩的边桩变形与内力。计算结果表明:在路堤填土侧压力作用下,边桩受到比较大的弯矩和剪力作用,而中桩受到较大轴力作用;刚性网格的设置以及边桩加密能在一定程度上减少了边桩弯矩和剪力,也能够有效地限制了边缘桩侧移,加强了路堤外边缘地基的稳定性;局部刚性网格梁使得边桩从单一个体连接成整体,整体性加强;刚性网格-桩加筋路基在沉降上有非常明显的优势,能更好的防止路堤边坡滑裂破坏。
[Abstract]:The thick embankment on soft soil can produce a potential failure surface from the top of the embankment to the top of the pile inside the embankment under the action of large lateral pressure.By using the finite element software Midas / GTS, the models of rigid pile reinforced roadbed and rigid grid-pile reinforced roadbed are established under the condition of bearing layer. The rigid pile reinforced roadbed is analyzed, the rigid grid beam is added locally, and the edge pile is encrypted.The deformation and internal force of the edge pile are increased by both the rigid grid beam and the edge pile.The results show that under the action of lateral pressure of embankment, the side pile is subjected to more bending moment and shear force, while the middle pile is subjected to greater axial force.The setting of rigid mesh and edge pile infill can reduce the bending moment and shear force of edge pile to some extent, also can effectively limit the lateral displacement of edge pile, and strengthen the stability of the edge foundation outside the embankment.Local rigid grid beam makes the side pile from a single individual into a whole, the integrity of the rigid grid-pile reinforced roadbed has a very obvious advantage in settlement, can better prevent the slope sliding damage.
【作者单位】：中交四航工程研究院有限公司;华南理工大学土木与交通学院;
【分类号】：U416.1

【相似文献】