中低压缩性地基上设置沉降后浇带的主裙楼沉降及基底反力分布特征

发布时间：2018-03-30 13:03

本文选题：沉降后浇带　切入点：主裙楼结构　出处：《岩土力学》2014年S2期

【摘要】：沉降后浇带是经常采用的主裙楼连接方式,设置沉降后浇带的大底盘高层建筑共同作用分析更复杂。介绍了设置沉降后浇带的大底盘高层建筑的共同作用分析方法:按施工过程中的不同工况分别计算,然后将计算结果叠加;采用有限压缩层地基模型,并考虑回弹再压缩;考虑上部结构刚度分段形成。对于中低压缩性地基上的主裙楼结构,通过对简化模型进行计算分析,得到了不同沉降后浇带设置位置、不同后浇带浇筑时间条件下的沉降、基底反力分布特征:后浇带封闭时间越晚,主裙楼连接处在封闭后产生的差异沉降越小,但主楼最大沉降会增加;与后浇带设置在主楼外第1跨相比较,后浇带设置在主楼外第2跨时,主楼最大沉降减少,主裙楼连接处的差异沉降减小,主楼下平均地基反力降低。
[Abstract]:The settlement post-pouring zone is a common way to connect the main skirt building. The interaction analysis of large chassis high-rise building with settlement post-pouring belt is more complicated. This paper introduces the common action analysis method of large chassis high-rise building with settlement post-pouring belt: calculated according to different working conditions in the construction process. Then the calculation results are superimposed; the finite compression layer foundation model is adopted, and the springback recompression is considered; the stiffness of the superstructure is considered to be formed in sections. For the main skirt structure on the medium and low compressible foundation, the simplified model is calculated and analyzed. The distribution characteristics of basement reaction force are obtained under different setting positions of post-pouring zone and different pouring time. The later the closing time of the post-pouring zone, the smaller the differential settlement in the connection of the main skirt building after the closure. However, the maximum settlement of the main building will increase, and compared with the first span outside the main building, the maximum settlement of the main building decreases, the differential settlement at the junction of the main skirt decreases, and the average ground reaction force decreases when the post-pouring belt is set at the second span outside the main building.
【作者单位】：中国建筑科学研究院地基基础研究所;
【分类号】：TU470

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