长江科学院院报2012，Vol.29Issue(1)：85-90,6.
板桩码头结构中桩体作用宽度试验研究
Experimental Investigation of Equivalent Breadth of Pile in Sheet-Pile Bulkhead
徐光明 1李士林 2刘永绣 3吴荔丹4
作者信息
- 1. 南京水利科学研究院,南京210029
- 2. 水文水资源与水利工程国家重点实验室,南京210029
- 3. 中国水电顾问集团贵阳勘测设计研究院,贵阳550008
- 4. 中交第一航务工程勘察设计院有限公司,天津300222
- 折叠
摘要
Abstract
Piles are mainly used to transfer vertical loads in soil ground. They are also frequently employed in port engineering to bear lateral thrust and to resist lateral deformation in the soil ground. As the horizontal load undertaken by a lateral bearing pile is not only through its shaft friction but also through the pressure difference between the retaining landside and its opposite seaside, the concerning mechanism is so complicated that so far there is no sophisticated procedures to exactly calculate the lateral action. In the current design practices of sheet-pile bulkhead, lateral loading pile is simplified as a retaining wall with an equivalent breadth assumed to be equal to twice the pile's width. The validity of such empirical method, however, is widely questioned; hence an investigation is needed to verify its effectiveness. An investigation by means of centrifuge model testing is carried out to determine the influence of ratio of space to width on equivalent breadth of one pile. Miniature earth pressure cells are installed on both sides of the pile to measure the distribution of pressures. Close correlation is found between the equivalent breadth of one pile and the ratio of space to width: the equivalent breadth ratio keq is approximately linearly increased with the ratio of space to width d/b as long as the value of d/b is less than 4; when the value of d/b exceeds 4, the value of keq is progressively proceeding to a constant, without significant change. In the common case of d/b =2, the observed value of keq is less than 2.0.关键词
板桩码头结构/前墙/桩/土压力/桩体作用宽度/离心模型试验Key words
sheet-pile bulkhead/ front wall/ pile/ earth pressure/ equivalent breadth of pile/ centrifuge model test分类
建筑与水利引用本文复制引用
徐光明,李士林,刘永绣,吴荔丹..板桩码头结构中桩体作用宽度试验研究[J].长江科学院院报,2012,29(1):85-90,6.
