挤扩支盘桩在特高压输电线路中的试验与研究  

Test and Research of Squeezed Branch Pile Foundation in UHV Transmission Line

作　　者：张文心[1] 刘洪义[1] ZHANG Wen-xin, LIU Hong-yi(Northeast Electric Power Design Institute Co., Ltd., Changchun 130021, China)

机构地区：[1]东北电力设计院,吉林长春130021

出　　处：《电力勘测设计》2018年第A02期187-192,共6页Electric Power Survey & Design

摘　　要：由于特高压输电线路电压等级高,杆塔基础承受的荷载大,采用传统的灌注桩基础,必然需要加大桩身直径、增加桩身长度,这将大大增加土方开挖量,钢筋和混凝土用量,增加工程造价。因此,有必要开展适用于输电线路大荷载条件下的新型灌注桩基础的应用研究。依托在建工程淮南-南京-上海1000kV交流特高压输电工程,通过现场真型试验研究,得到挤扩支盘桩单桩及群桩的承载力性状和变形性能。综合分析试验数据,根据调研及所收集的资料等得出挤扩支盘桩的竖向荷载传递规律及承载性能的变化规律,建议给出适用于输电线路工程的挤扩支盘桩的承载力设计计算方法,为支盘桩在线路工程中的应用提供设计参考及理论支撑。Since the UHV transmission line high voltage level, high load of tower foundation, pile foundation by traditional, inevitable need to increase the diameter of the pile body, increase the length of pile, which will greatly increase the amount of earth excavation, steel and concrete, increase the project cost. Therefore, it is necessary to develop a new type of cast-in-place pile foundation for large load of transmission line. Based on the construction of Huainan Nanjing Shanghai AC UHV transmission project under construction, the bearing capacity and deformation properties of single pile and group pile of squeezed branch pile are obtained by feld test. A comprehensive analysis of the test data, according to the survey and data collected and concludes the change law of squeezed pile with expanded branches and plates of vertical load transfer law and bearing capacity, are applicable to transmission line engineering pile bearing capacity design method, provide design reference and theoretical support for the application of CPBP in line in engineering.

关 键 词：挤扩支盘桩 灌注桩 输电线路 

分 类 号：TM75[电气工程—电力系统及自动化]