大型储罐CFG桩复合地基变形性状和变刚度调平设计

李继才; 郦能惠; 丛建; 曹永琅; 曹军

doi:10.11779/CJGE201806017

大型储罐CFG桩复合地基变形性状和变刚度调平设计 English Version

李继才^{1, 2},
郦能惠^1, ,,
丛建¹,
曹永琅¹,
曹军^{1, 2}

1. 南京水利科学研究院,江苏南京210029;
2. 南京瑞迪建设科技有限公司,江苏南京 210029

详细信息

作者简介:
李继才(1976- ),男,高级工程师,主要从事地基处理等方面的科研工作。E-mail：jcli520@126.com。

通讯作者:
郦能惠，E-mail：nhli@nhri.cn

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出版历程
- 收稿日期: 2017-06-04
- 发布日期: 2018-06-24

Deformation behaviors and variable rigidity design with equilibrium settlement for CFG pile composite foundation of large storage tanks

LI Ji-cai^{1, 2},
LI Neng-hui^1, ,,
CONG Jian¹,
CAO Yong-lang¹,
CAO Jun^{1, 2}

1. Nanjing Hydraulic Research Institute, Nanjing 210029, China;
2. Nanjing R & D Tech Group Co., Ltd., Nanjing 210029, China;

摘要

摘要: 大型储罐对地基的承载力要求高,对不均匀沉降量有严格限定,天然地基不能满足要求,需要进行地基处理。通过现场试验和数值分析相结合的手段研究了大型储罐CFG桩复合地基的变形性状,揭示了大型储罐CFG桩复合地基的沉降呈内大外小的碟形分布,距储罐地基中心0.7R（半径）范围内沉降值较大且变化幅度不大（约为20%）,定义为储罐地基沉降核心区,影响沉降最主要的因素是CFG桩的桩长,在此基础上提出大型储罐复合地基空间变刚度调平设计方法,即增加沉降核心区的地基刚度或同时减小沉降非核心区的地基刚度,以有效减小储罐地基的差异沉降,改善储罐结构的受力状态。
- 大型储罐 /
- CFG桩 /
- 复合地基 /
- 变形性状 /
- 空间变刚度调平
Abstract: The foundation of large storage tanks has requirements of large bearing capacity and limited differential settlement. Because the natural foundation generally cannot meet the requirements of bearing capacity and deformation, it needs to be treated. It is revealed that the settlement distribution of the foundation of storage tanks has the shape of the disc with large settlement inside and small one outside, and the settlement within the scope of 0.7R away from the center of foundation is large and has no great change（about 20%）through field tests and numerical simulations, which is defined as the core area for the foundation settlement of storage tanks. The most sensitive influencing factor to the settlement of CFG pile composite foundation of large storage tanks is the length of CFG piles. On this basis, the spatial variable rigidity design method with equilibrium settlement for the composite foundation of large storage tanks is proposed to raise the rigidity in the core settlement areas and to reduce that of the foundation in other areas. Thus the differential settlement of tank foundation is effectively reduced and the stress state of storage tank structure is improved.
- large storage tank /
- CFG pile /
- composite foundation /
- deformation behavior /
- spatial variable rigidity of equilibrium settlement

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参考文献(9)

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