Adina在基坑支护结构稳定分析中的应用

Application of Adina in the foundation-pit excavation and the deformation control

开挖后的基坑,桩后土体有向坑内移动的趋势,对基坑本身以及周围建筑物将产生不利影响,因此选择合适的支护方案是确保工程安全顺利进行的关键。本文以北京某深基坑工程实例为基础,采用单排钻孔灌注桩加冠梁、锚杆支护形式,通过现场原位测试获得土体的各项物理力学参数,应用Adina大型有限元分析软件对该工程的基坑开挖过程进行模拟分析,得到不同开挖深度下支护桩的水平位移分布规律,通过与实测数据进行对比,分析说明采用Adina软件模拟的可行性和可靠性,并通过改变影响支护结构变形的因素,分析说明在不同情况下随着基坑开挖深度的变化支护结构的变形情况。

After the excavation of foundation pit started, soil mass had a trend to move into the pit and the foundation pit itself and nearby buildings will be adversely affected. In consequence, chooseing a reasonable support scheme is the key to ensure the project smoothly. On the basis of a deep foundation pit project example, using single row piles with beam and bolt support forms,in-situ measurement of soil physicochemical factors was carried. In order to simulate the excavation process of foundation pit and get the horizontal displacement of supporting pile under different excavation depth,this paper does a simulative analysis for it with Adina finite element software. By comparing with experimental data indicates Adina simulation is feasible,and by changing the factors affecting of supporting structure deformation, analysis that deformation of retaining structure with the change of the excavation depth under different condition.