| 水平荷载作用下风电机桩基础的离心模型试验研究 |
| |
| 引用本文： | 荣冰,张嘎,张建民.水平荷载作用下风电机桩基础的离心模型试验研究[J].岩土力学,2012,33(2):428-432. |
| |
| 作者姓名： | 荣冰 张嘎 张建民 |
| |
| 作者单位： | 1.清华大学 水沙科学与水利水电工程国家重点试验室，北京 100084; 2.北京城建设计研究总院有限责任公司，北京 100037 |
| |
| 基金项目： | 中国水利水电科学研究院开放研究基金;国家自然科学基金重点项目(No.51038007) |
| |
| 摘 要： | 桩基础是近海风机经常采用的基础形式。由于风电机组对基础的承载力和变形有着严格的要求，而水平荷载常常是控制荷载，因此，研究水平荷载作用下风机桩基础的应力、变形特性具有重要意义。针对风机单桩基础，选取典型的黏土地基，进行了水平加载条件下的离心模型试验，重点分析了桩身的响应及桩周围土体的变形特点。试验结果表明，在水平荷载作用下，桩顶的水平位移随着水平力的增加而增加，位移的增加速率在临界荷载之后增长较快；桩身弯矩分别在埋深1/5和3/5处附近分别出现极大值和极小值，且桩底具有一定弯矩值；桩周围土体的变形随着离桩距离的增加而减小，可分为主动区和被动区。桩对土体变形的影响区域随着水平力的增加而不断扩展，最后基本稳定在2倍桩径范围内。
|
| 关 键 词： | 风力发电 桩基础 水平加载 离心模型试验 变形 |
| 收稿时间： | 2010-07-12 |
Centrifuge model tests for pile foundation of wind power generation under horizontal loads |
| |
| RONG Bing
,
ZHANG Ga
,
ZHANG Jian-min.Centrifuge model tests for pile foundation of wind power generation under horizontal loads[J].Rock and Soil Mechanics,2012,33(2):428-432. |
| |
| Authors: | RONG Bing ZHANG Ga ZHANG Jian-min |
| |
| Institution: | 1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. Beijing Urban Engineering Design & Research Institute Co., Ltd., Beijing 100037, China |
| |
| Abstract: | Pile groups are widely used in offshore wind power generation as its foundation.The bearing capacity and deformation of foundation,with strict requirements for the wind power generations,is of great significance to be investigated under horizontal loads that is the control factor of the fans tower.Centrifuge model tests for offshore pile foundation and typical clay ground are conducted to actively study the pile behavior and the deformation characteristics of the surrounding soil.The test results show that: under horizontal loads,the displacement of pile top increases with the increasing load,while the increasing rate speeds up after the critical horizontal load.The bending moment of pile has a maximum in the 1/5 of burying depth and a minimum in the 3/5 of it,while there is a certain value at the bottom of the pile.The deformation of the soil around the pile,which is divided into active region and passive region,decreases as the distance from the pile increases,while the influence area expands with the increasing horizontal load,and finally stabilizes at twice the pile diameter range. |
| |
| Keywords: | wind power generation pile foundation horizontal loading centrifuge model test deformation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
