摘要
针对广州市南沙软土地区高压铁塔在堆土荷载作用下的变形破坏现象,运用Abaqus有限元软件,并考虑软土的高灵敏特性,对扰动区软土进行强度折减,对堆载作用下软土地基高压铁塔基础的变形破坏行为进行模拟,揭示邻近堆土荷载作用下深厚软土层中塔基变形的影响机理。结果表明,受扰动地区的浅层淤泥在地面填土荷载产生的附加应力作用下发生破坏、流动,此外铁塔东面为河涌、河流,地势比铁塔桩基础顶面低,形成临空坡面,淤泥层更易发生剪切破坏并往临空面流动,从而导致塔基产生更大的变形以致高压电塔失稳。
In view of the deformation and failure phenomenon of high-pressure iron tower in nansha soft soil area of Guangzhou city under pile load,considering the high sensitivity of soft soil,Abaqus finite element software was used to reduce the strength of soft soil in the disturbed area,and simulating the deformation and failure behavior of high-pressure iron tower foundation on soft soil under pile load,so that to reveal the influence mechanism of foundation deformation in deep soft soil under the loading of adjacent pile.The results show that the shallow silt in the disturbed area is damaged and flowed under the additional stress generated by the ground filling load.In addition,on the east side of the tower is a river and creak water,and the terrain is lower than the top surface of the tower pile foundation,forming a free slope surface.The silt layer is more prone to shear failure and flow to the free surface,resulting in greater deformation of the tower foundation and instability of the high-voltage tower.
作者
谷任国
詹立贵
房营光
GU Renguo;ZHAN Ligui;FANG Yingguang(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China)
出处
《应用科技》
CAS
2023年第4期109-113,共5页
Applied Science and Technology
基金
国家自然科学基金青年基金项目(51208211)
华南理工大学亚热带建筑科学国家重点实验室自主研究项目(2017KB16)。
关键词
地面荷载
高灵敏性
深厚软土
高压输电塔
桩基变形
失稳机理
强度折减
数值分析
ground load
high sensitivity
deep soft soil
high voltage tower
deformation of the pile foundation
instability mechanism
strength reduction
numerical analysis
