摘要
某基坑工程采用"水泥土搅拌桩与喷锚土钉墙"支护结构形式。通过有限元软件ADINA对该基坑及支护形式进行三维建模,得出以下结论:随着水泥土搅拌桩厚度的增大,桩的水平位移逐渐减小,桩的最大位移发生在桩底,最小水平位移发生在桩顶;水泥搅拌桩的厚度可以有效地控制桩的水平,从而可以提高水泥土搅拌桩的稳定系数,在实际工程中更加安全;支护形式为水泥土搅拌桩与喷锚土钉墙,支护结构的强度和刚度均远远大于土体,土与土钉之间的相互作用(摩擦传力)的最大值的位置主要发生在土钉的前半部分,在土钉中部轴力达到最大。
＂ Cement -soil mixing pile and anchor- anchored soil nailing wall＂ supporting structure is adopted in a foundation pit engineering. By employing the finite element software ADINA, this paper conducts 3d- modeling of the foundation pit and support form and comes to the conclusion： （1） with the thickness increase of cement - soil mixing pile, the horizontal pile displacement gradually decreases ; the maximum displacement of the pile occurs at the bottom of the pile, and the minimum horizontal displacement occurs at the top. （2） the thickness of cement mixing pile can effectively control the pile level ,which can improve the pile stable coefficient and bring better security in actual projects. （3） The support form is cement -soil mixing pile and anchor - anchored soil nailing wall and the strength and rigidity of the structure are far greater than the soil body. The position of the maximum interaction between soil and soil nails （friction force） is mainly in the first part of soil nails, reaching the maximum axial force in the middle.
作者
杨青
YANG Qing(Shanxi Architectural College, Taiyuan, Shanxi, 030006, Chin)
出处
《建材技术与应用》
2018年第1期17-19,共3页
Research and Application of Building Materials
关键词
水泥土搅拌桩
土钉墙
位移
轴力
cement soil displacement
axial force mixing pile
soil nailing wall
