根式基础透明土模型与数值模拟受力特性  

Model and numerical simulation of transparent soil for root foundation

作　　者：陈思良 黄雪峰 袁俊[4] 张君 梁雪岚 CHEN Siliang;HUANG Xuefeng;YUAN Jun;ZHANG Jun;LIANG Xuelan(School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Department of Military Installations Engineering,Army Logistical University of PLA,Chongqing 401311,China;Northwest Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Xi’an 710075,China;Qinghai Power Transmission&Transformation Engineering Co.,Ltd.,Xining 810001,China;State Grid Qinghai Electric Power Company Construction Company,Xining 810000,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]兰州理工大学土木工程学院,兰州730050 [3]陆军勤务学院军事设施工程系,重庆401311 [4]中国电力工程顾问集团西北电力设计院有限公司,西安710075 [5]青海送变电工程有限公司,西宁810001 [6]国网青海省电力公司建设公司,西宁810000

出　　处：《中国科技论文》2023年第2期179-185,共7页China Sciencepaper

基　　金：国网青海省电力公司科技项目(52283820000A)。

摘　　要：为研究根式基础在电塔基础上的受力特性,采用透明土与粒子图像测速(particle image velocimetry,PIV)技术,分析3种根式基础受上拔、水平荷载时的荷载-位移(Q-s)关系曲线,以及极限荷载条件下透明土的位移矢量变化,通过数值模拟探究不同根键长度对基础承载力的影响。结果表明:相同工况下,单层根式基础竖向抗拔承载性高于双层根式基础,但单层根式基础抗水平承载性低于双层根式基础。根键竖向间距为0.02 m双层根式基础位移矢量图显示,位移较大区域符合经典摩尔-库仑理论中的剪切破坏理论。数值模拟结果显示,双层根键竖向布置间距范围为0.83~1.25倍基础直径、根键长度为0.6 m时,抗拔承载性能较优。In order to study the mechanical characteristics of the root foundation on the electric tower foundation,transparent soil and particle image velocimetry(PIV)technology were used to analyze the load-displacement(Q-s)curve of three kinds of root foundations under uplift and horizontal load,and the displacement vector change of transparent soil under ultimate load.Numerical simulation was applied to explore the influence of different root key lengths on the foundation bearing capacity.The results show that under the same working conditions,the vertical uplift bearing capacity of single-layer root foundation is higher than that of double-layer root foundation,but the horizontal bearing capacity of single-layer root foundation is lower than that of double-layer root foundation.The displacement vector diagram of double-layer root foundation with a vertical spacing of 0.02 m shows that the area with large displacement conforms to the shear failure theory in the classical Mohr-Coulomb theory.The numerical simulation shows that the uplift bearing performance is better when the vertical spacing of double-layer root keys is 0.83-1.25 times the foundation diameter and the root key length is 0.6 m.

关 键 词：根式基础 透明土 位移矢量 数值模拟 

分 类 号：TU473.1[建筑科学—结构工程]