某高陡坡地桩箱复合基础嵌固层的有效性分析

Effectiveness analysis of pile-box compound foundation on a high-steep slope

天然高陡坡地场地条件复杂,开挖平整场地困难且花费成本昂贵,可以考虑直接在原始高陡坡地上建造房屋,需要研究基础的有效嵌固,保证在高陡坡地上基础承载力、刚度以及充分的抗震性能。本文对某高陡坡掉层结构基础嵌固层的有效性进行了研究,提出解决高陡坡掉层结构无法有效嵌固的箱桩复合基础设计方案。通过计算基础在大震作用下水平承载力,以及分析结构掉层部分在大震下动力弹塑性的性能,验证了高陡坡下人为构造基础嵌固层是有效和可行的。

The natural high gradient site conditions are complex,and the excavation and leveling of the site is difficult and expensive.It can be considered to directly build houses on the original high gradient.It is necessary to study the effective embedding and fixation of the foundation to ensure the bearing capacity,stiffness and sufficient seismic performance of the foundation on the high gradient.In this paper,the effectiveness of the basic embedded layer about a high-slip slope structure is studied.A box-pillar composite foundation design scheme is proposed to solve the problem that the high-and-steep slope layer structure could not be effectively embedded.By calculating the horizontal bearing capacity under the action of large earthquakes and analyzing the performance of the dynamic elasto-plasticity of the strata of the structures under large earthquakes,it is verified that the artificial embedded foundation under large and steep slopes is effective and feasible.