外有堆载的箱涵深基坑桩锚支护合理形式研究
发布时间：2018-09-04 18:07
【摘要】：采用有限元法模拟分析了在较大坑外堆载条件下,桩锚支护箱涵深基坑的受力规律,并通过对比四种桩锚方案的支护结构受力状况和过程,探讨了不同应力特点对支护结构的影响。结果表明,堆载对基坑上层土体产生了很大的侧向压力,因此把首层锚索尽可能地设置在护坡桩顶,并予以加强,可以有效地控制桩的位移和内力,而增设双排桩对改善支护结构内力的效果不显著,不建议采用。另外,锚桩受到地层的约束较弱,在水平拉力下几乎呈平动,未能有效起到锚的作用,因此也不建议采用。
[Abstract]:The finite element method is used to simulate and analyze the stress law of the deep foundation pit of the box culvert supported by pile and anchor under the condition of loading outside the large pit, and by comparing the stress state and process of the supporting structure of four kinds of pile and anchor schemes, The influence of different stress characteristics on support structure is discussed. The results show that the surcharge has great lateral pressure on the upper soil of foundation pit. Therefore, the first layer anchor cable can be set on the top of the slope protection pile as far as possible and strengthened, which can effectively control the displacement and internal force of the pile. However, the effect of adding double row piles to improve the internal force of supporting structure is not remarkable, so it is not recommended to use. In addition, the anchor pile is weak by the constraints of the stratum, and is almost translational under the horizontal tensile force, which can not play the role of anchor effectively, therefore, it is not recommended to use it.
【作者单位】： 北京工业职业技术学院;中国水利水电科学研究院;
【基金】：北京工业职业技术学院2013年院级科研课题“深基坑支护施工全过程仿真系统的开发”(bgzyky201362) 水利部公益性行业科研专项“水利水电专业软件平台开发”(201201050)
【分类号】：U449.82
本文编号：2222943
[Abstract]:The finite element method is used to simulate and analyze the stress law of the deep foundation pit of the box culvert supported by pile and anchor under the condition of loading outside the large pit, and by comparing the stress state and process of the supporting structure of four kinds of pile and anchor schemes, The influence of different stress characteristics on support structure is discussed. The results show that the surcharge has great lateral pressure on the upper soil of foundation pit. Therefore, the first layer anchor cable can be set on the top of the slope protection pile as far as possible and strengthened, which can effectively control the displacement and internal force of the pile. However, the effect of adding double row piles to improve the internal force of supporting structure is not remarkable, so it is not recommended to use. In addition, the anchor pile is weak by the constraints of the stratum, and is almost translational under the horizontal tensile force, which can not play the role of anchor effectively, therefore, it is not recommended to use it.
【作者单位】： 北京工业职业技术学院;中国水利水电科学研究院;
【基金】：北京工业职业技术学院2013年院级科研课题“深基坑支护施工全过程仿真系统的开发”(bgzyky201362) 水利部公益性行业科研专项“水利水电专业软件平台开发”(201201050)
【分类号】：U449.82
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