（悉地国际设计顾问（深圳）有限公司， 深圳 518048）

［摘要］宽7m、长1 000m的螺旋环道通过悬挑钢板连接件与32颗斜柱偏心连接成一倒锥体螺旋结构，结构体系新颖。基于结构特点，对基础、环形承台、螺旋环道活荷载分布、斜柱、预应力钢棒拉杆、螺旋环道、悬挑钢板连接件进行了研究分析，并对结构线性和非线性屈曲、螺旋环道人行舒适度、结构抗连续倒塌以及悬挑钢板与斜柱的节点等进行专项分析，并有针对性地采取了加强措施。结果表明结构具有良好刚度和强度，满足规范各项指标要求。保证了工程的安全性、合理性。

［关键词］倒锥体螺旋结构；  环形承台；  预应力钢棒拉杆；  螺旋环道；  悬挑钢板连接件；  人行舒适度

中图分类号：TU391文献标识码：A文章编号：1002-848X(2020)17-0046-05

Inverted cone helical structural design of the urban island of Meixi Lake in Changsha

LIU Yunlang, LI Jianwei, FU Xueyi, ZHANG Ming, WANG Ning

(CCDI International (Shenzhen) Design Consultants Co., Ltd., Shenzhen 518048, China)

Abstract:The helical walkway with a width of 7m and a length of 1 000m is eccentrically connected with 32 inclined columns through a cantilevered steel plate connector to form an inverted cone helical structure. The structure system is novel. Based on the structural characteristics, the foundation, ring caps, walkway live load distribution, inclined column, prestressed steel round bar, helical walkway, cantilevered steel plate connectors were studied and analyzed. Special analysis was carried out on the linear and nonlinear buckling of the structure, walking comfort of the walkway, the progressive collapse of the structure, and the joints of the cantilevered steel plate and the inclined column. Take targeted measures to strengthen. The results show that the structure has good rigidity and strength, and meets the requirements of the specifications. The safety and rationality of the project were ensured.

Keywords:inverted cone helical structure; ring cap; prestressed steel round bar; helical walkway; cantilever steel plate connector; walking comfort

作者简介：刘云浪，硕士，高级工程师，一级注册结构工程师，Email：liu.yunlang@ccdi.com.cn。