新型陆地风电空心锥形基础组合承载特性  

Bearing Behavior of Cone-Shaped Hollow Foundation under Combined Loads

作　　者：宋福星 李大勇 张雨坤[2] 梁昊 SONG Fu-xing;LI Da-yong;ZHANG Yu-kun;LIANG Hao(School of Petroleum Engineering,China University of Petroleum,Qingdao 266580,China;Shandong Province Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science of Technology,Qingdao 266590,China)

机构地区：[1]中国石油大学储运与建筑工程学院,青岛266580 [2]山东科技大学山东省土木工程防灾减灾重点试验室,青岛266590

出　　处：《科学技术与工程》2025年第10期4300-4308,共9页Science Technology and Engineering

基　　金：山东省自然科学基金青年基金(ZR2022QE029)。

摘　　要：空心锥形基础是一种新型陆地风电基础形式,相比于传统重力式基础,具有钢筋和混凝土用量低、减少基坑开挖产生废渣土等优点。为研究空心锥形基础在组合荷载下的承载特性,通过开展数值模拟,探究基础体积一定时,基础顶板直径与底板直径比对基础组合承载能力和破坏模式的影响。结果表明:当顶板与底板直径比为6时,空心锥形基础竖向极限承载力较同体积重力式圆形基础提高1倍,弯矩极限承载力提高60%。不同组合荷载下,不同直径比的空心锥形基础的破坏包络线可分别用一条曲线描述,提出不同组合荷载的破坏包络线表达式。水平与弯矩组合荷载下,重力式圆形基础和空心锥形基础的破坏包络线呈现明显的非对称性,偏心方向相反。圆形基础在水平与弯矩荷载异向时承载力较高,空心锥形基础在水平和弯矩同向时承载力较高。空心锥形基础有较好组合承载能力,可为超大单机装机容量风机提供保障。Cone-shaped hollow foundation is a new form of onshore wind power foundation,which has the advantages of low steel and concrete consumption and reduced waste soil generation during excavation of the foundation pit,compared with the traditional gravity foundation.In order to investigate the bearing characteristics of a cone-shaped hollow foundation under combined loads,a numerical simulation was carried out to investigate the influence of the ratio of the diameter of the top plate to the diameter of the bottom plate on the combined bearing capacity and damage mode of the foundation when the volume of the foundation is held constant.The results demonstrate that when the ratio of the diameter of the top plate to the diameter of the base plate is 6,the vertical ultimate bearing capacity of the cone-shaped hollow foundation is 100%higher than that of the same volume gravity circular foundation,and the moment ultimate bearing capacity is 60%higher.The failure envelopes of different diameter ratios of the cone-shaped hollow foundation can be described by a curve under different combination loads,and the expressions of the failure envelopes of different combination loads are proposed.The failure envelopes of gravity circular and cone-shaped hollow foundations under combined horizontal and bending moment loads show obvious asymmetry,with opposite directions of eccentricity.When the horizontal and bending moment loads are in different directions,the circular foundation has higher bearing capacity.When the horizontal and bending moment are in the same direction,the cone-shaped hollow foundation has higher bearing capacity.The cone-shaped hollow foundation shows a better combination of load-bearing capacity,which can be provided for the super-large single installed capacity wind turbine.

关 键 词：空心锥形基础 组合加载 破坏包络线 数值模拟 承载力 

分 类 号：TU476.9[建筑科学—结构工程]