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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2017, Vol. 36 ›› Issue (3): 65-70.DOI: 10.3969/j.issn.1674-0696.2017.03.11

• 港口航道·水利水电·资源环境 • 上一篇    下一篇

双排抗滑桩承台的优化设计研究

叶四桥，潘新恩   

  1. (1.重庆交通大学 河海学院，重庆 400074；2.重庆市地质矿产勘查开发局，重庆 401121)
  • 收稿日期:2015-10-19 修回日期:2015-12-11 出版日期:2017-03-20 发布日期:2017-03-24
  • 作者简介:叶四桥(1978—)，男，湖北孝感人，教授，博士，主要从事岩土与地质灾害防治方面的研究。E-mail：yesiqiao@cqjtu.edu.cn。
  • 基金资助:
    水利水运工程教育部重点实验室开放基金资助项目(SLK2009B01)；重庆市国土资源和房屋管理局科技项目(CQGT2012018)

Optimization of Waters Layout of a Port in South China from Navigation Security Perspective

HUANG Xiaxing   

  1. (1.School of River & Ocean Engineering，Chongqing Jiaotong University，Chongqing 400074，P.R.China； 2.Chongqing Geology and Minerals Exploration Bureau，Chongqing 401121，P.R.China)
  • Received:2015-10-19 Revised:2015-12-11 Online:2017-03-20 Published:2017-03-24

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摘要： 为探求承台厚度变化对结构受力和变形的影响，采用数值模拟方法，研究了有无承台、及承台厚度在0.25~1.25倍桩径区间变化时，双排抗滑桩桩身变形、内力分布、荷载分担的变化规 律。研究发现：桩顶承台的存在，起到了协调前后排桩的变形和分配内力的作用，使得双排桩结构受力更合理；而且随着承台尺寸和刚度的增大，桩身内力及变形均有所降低，但承台厚度与 桩径之比超过0.5时，降低效应开始逐渐递减。综合研究结果及构造要求，建议承台厚度取为其桩身直径的1/2~3/4，且不小于500 mm，并最终按承台受力确定；桩与承台连接的内侧易出现应 力集中造成结构破坏，此处应加强配筋。

关键词: 岩土工程, 双排抗滑桩, 承台, 结构设计, 数值模拟

Abstract: In order to explore the influence of cap thickness on the stress and deformation of the structure，numerical simulation method was used to study the variation rule of double-row anti-slide pile deformation，stress distribution and load sharing under below situations： with or without pile cap，and the cap thickness changing in 0.25 to 1.25 times of the pile diameter.It is found that the existence of the pile cap plays a key role in coordination with the former and the rear piles deformation and the distribution of internal force，which makes the forcing structure of double row pile more reasonable.Moreover，with the increase of pile cap size and stiffness，the pile internal force and deformation are decreased at a certain degree； but when the ratio of the cap thickness and the pile diameter is greater than 0.5，the reduction effect gradually decreases.Combining research results and structural requirements，it is recommended that the thickness of cap should be 1/2~3/4 of pile diameter and not less than 500 mm，and it should be ultimately determined by the force according to the cap.At the same time，it is found that the inner side of the connection between the pile and the pile cap is easy to have structural damage caused by stress concentration； therefore，the connection should be reinforced.

Key words: geotechnical engineering, double-row anti-slide pile； pile cap； structure design； numerical simulation

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