塔克拉玛干沙漠输电线塔装配式基础试验研究

›› 2011, Vol. 32 ›› Issue (8): 2359-2364.

塔克拉玛干沙漠输电线塔装配式基础试验研究

乾增珍¹，鲁先龙^{1, 2}，丁士君²

1.中国地质大学（北京）工程技术学院，北京 100083；2.中国电力科学研究院输变电工程力学研究所，北京 100192

收稿日期:2010-05-11 出版日期:2011-08-10 发布日期:2011-08-16
作者简介:乾增珍，女，1975年生，博士，讲师，主要从事岩土工程领域的教学与科研工作

Experimental study of assembly foundation for transmission line tower in Taklimakan desert

QIAN Zeng-zhen¹, LU Xian-long^{1, 2}, DING Shi-jun²

1. School of Engineering and Technology, China University of Geosciences, Beijing 100083, China; 2. Transmission and Transformation Engineering Mechanics Research Department, China Electric Power Research Institute，Beijing 100192, China

Received:2010-05-11 Online:2011-08-10 Published:2011-08-16

摘要/Abstract

摘要： 为研究新疆塔克拉玛干沙漠地区输电线路工程中的组合装配式杆塔基础承载特性，开展了2种尺寸规格共4个基础在上拔与水平力组合作用下的现场试验，得到了基础顶部和基础底板的荷载-位移曲线、基础底板土压力变化规律。结果表明：上拔与水平力组合作用下，基础顶部上拔荷载-位移曲线为缓变型、水平荷载-位移曲线近似为直线；由混凝土底板和角钢支架所构成的组合装配式基础因自重轻、基础底板上覆沙体结构松散，使得基础的抗倾覆承载能力低。由混凝土底板和角钢支架组成的装配式基础各部件具有良好的协同工作性能，但水平荷载对装配式基础的承载性能影响大。根据基础上拔极限承载力试验值，采用柱式破裂面力学计算模型得到风加沙柱面平均摩擦阻力为2.6 kPa

关键词: 塔克拉玛干沙漠, 装配式基础, 输电线路基础, 风积沙, 上拔承载力

Abstract: In order to obtain the performance of assembly foundations composed by the concrete footing slab and steel angle column, which are used for the transmission line engineering in Taklimakan desert, the four in-site full-scale of two sizes tests on the bearing capacity of assembly foundations combined uplift with horizontal loadings are carried out. The curves of load-displacement both of footing slab and foundation top plane, and the soil pressure on the footing slab are all obtained. For the foundation top plane, combined the uplift with horizontal loadings, the curve of uplift loading-displacement develops slowly; and the curve of horizontal loading-displacement increases linearly. The anti-overturning bearing capacity of assembly foundation is weak because of light dead weight of the steel support frame and the loose property of aeolian sand. The assembly foundation composed by concrete footing slab and steel angle column has a good property of coordinated performance. Influence of horizontal loading on bearing capacity of assembly foundation is obvious. According to the test data of ultimate uplift bearing capacity, the average frictional resistance of aeolian sand is 2.6 kPa, which is calculated by mechanical model of prismatic fracture plane.

Key words: Taklimakan desert, assembly foundation, transmission line foundation, aeolian sand, uplift bearing capacity

中图分类号:

TU 476+9

乾增珍，鲁先龙，丁士君. 塔克拉玛干沙漠输电线塔装配式基础试验研究[J]. , 2011, 32(8): 2359-2364.

QIAN Zeng-zhen , LU Xian-long , DING Shi-jun. Experimental study of assembly foundation for transmission line tower in Taklimakan desert[J]. , 2011, 32(8): 2359-2364.

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