电塔桩基受采动及风荷载共同影响下的变形特征研究  

Study on deformation characteristics of pile foundation of electric tower under the combined influence of mining and wind load

作　　者：秦忠诚[1] 李晓禾 门懋进 高彪[1] QIN Zhongcheng;LI Xiaohe;MEN Maojin;GAO Biao(College of Energy and Mining Engineering,Shandong University of Science and Tenchnology,Qingdao 266590,China;College of Safety and Environmental Engineering,Shandong University of Science and Tenchnology,Qingdao 266590,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590 [2]山东科技大学安全与环境工程学院,山东青岛266590

出　　处：《矿业安全与环保》2022年第4期181-186,共6页Mining Safety & Environmental Protection

基　　金：山东省自然科学基金面上项目(ZR2021ME248);山东省自然科学基金重点项目(ZR2020KE030)。

摘　　要：为探究电塔桩基受采动及风荷载共同影响下的变形特征,以朱家峁煤矿3302工作面上方电塔桩基为研究对象,基于现场勘测地质资料,采用剖面函数法预计桩基下沉值,并借助FLAC数值模拟软件,分析电塔桩基的变形特征。研究结果表明:采动影响下,黄土谷壑地形对地表移动变形的影响较大,并且坡体移动变形比平地及坡顶变形大;采动作用对地表桩基变形影响显著,风荷载也会对桩基造成影响;对比采动与风荷载共同作用下黄土谷壑地形的地表桩基变形预计值、模拟值及实际监测值,发现模拟值较符合现场实际。模拟研究得出,桩基最大沉降差出现在AB两桩之间,沉降差为44.45 mm,倾斜值为2.22 mm/m,越靠近采空区受到的影响越大。In order to investigate the deformation characteristics of pile foundation of electric tower under the combined influence of mining and wind load. Take the pile foundation of electric tower in 3302 working face of Zhujiamao Coal Mine as the research target. Based on the geological data of the site survey, the pile foundation sinking value was predicted by the section function method, and the deformation characteristics of pile foundation of electric tower were analyzed by FLACnumerical simulation software. The results show that under the influence of mining, the topography of loess valley gullies has a strong influence on the moving deformation of the surface, and the movement deformation of slope body is larger than that of flat land and slope top;significant effects of mining action on the deformation of surface pile foundation, as well as the effects of wind loads on pile foundations;comparing the predicted, simulated and actual monitoring values of loess valley topography under the combined effect of mining and wind load, it is found that the simulated values are more in line with the actual situation. The simulation results show that the maximum sinkage difference of pile foundation was found between the two piles of A and B, with a settlement difference of 44.45 mm and a tilt value of 2.22 mm/m. The closer the pile is to the goaf, the greater the impact will be.

关 键 词：开采沉陷 风荷载 电塔桩基 下沉 数值模拟 变形特征 

分 类 号：TD325[矿业工程—矿井建设]