Experimental Study on the Load Bearing Capability of Oblique Pyramid Eccentric Assembled Foundation in Transmission Line

doi:10.11930/j.issn.1004-9649.201604144

Abstract

Abstract: Through modifications and improvements in layout type of scaffolds and connection mode, the eccentric assembled foundation consisting of concrete laths and angle steel scaffolds can improve foundation force bearing and effectively save steel consumption. Real-model tensile and compressive tests are conducted on the backfill clay along direction of main member and diagonal member of tower leg. Through analysis of load displacement curves, steel bracket stress strain relationship, surface cracks and base soil pressure distribution law, mechanical performance and fault status are tested and verified. The ultimate tensile bearing capacity of the eccentric assembled foundation is 1.5 times that of the design value, and the ultimate compressive bearing capacity is 1.8 times. The basic structure is still in elastic state and can meet design requirements under those conditions. The results can provide reference for future engineering applications in transmission line.

Key words: transmission line, assembled foundation, pyramid scaffold, cross-shaped welded plate, load bearing capability

CLC Number:

TU443

ZHANG Qiang, ZHENG Weifeng, ZHAO Qingbin. Experimental Study on the Load Bearing Capability of Oblique Pyramid Eccentric Assembled Foundation in Transmission Line[J]. Electric Power, 2018, 51(2): 1-6.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201604144

https://www.electricpower.com.cn/EN/Y2018/V51/I2/1

References

[1] 程永锋, 邵晓岩, 朱全军. 我国输电线路基础工程现状及存在的问题[J]. 电力建设, 2002, 23(3): 32-34.
CHENG Yong-feng, SHAO Xiao-yan, ZHU Quan-jun. Current situation of foundation works and existing problems for transmission lines in China[J]. Electric Power Construction, 2002, 23(3): 32-34.
[2] 鲁先龙, 程永锋. 我国输电线路基础工程现状与展望[J]. 电力建设, 2005, 26(11): 25-27.
LU Xian-long, CHENG Yong-feng. Current status and prospect of transmission tower foundation engineering in China[J]. Electric Power Construction, 2005, 26(11): 25-27.
[3] 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]. 岩土力学, 2011, 32(8): 2359-2365.
QIAN Zeng-zhen, LU Xian-long, DING Shi-jun. Experimental study of assembly foundation for transmission line tower in Taklimakan desert[J]. Rock and Soil Mechanics, 2011, 32(8): 2359-2365.
[4] 程永锋, 丁士君. 沙漠地区风积沙地基输电线路装配式基础真型试验研究[J]. 岩土力学, 2012, 33(11): 3230-3236.
CHENG Yong-feng, DING Shi-jun. Prototype tests of assembly foundation of transmission line in aeolian sand area[J]. Rock and Soil Mechanics, 2012, 33(11): 3230-3236.
[5] ACCF Sieira, DMS Gerscovich, A S F J Sayão. Displacement and load transfer mechanisms of geogrids under pullout condition[J]. Geotextiles and Geomembranes, 2009, 27(4): 241–253.
[6] 国家电网公司基建部. 输电线路全过程机械化施工技术设计分册[M]. 北京: 中国电力出版社, 2015.
[7] 架空输电线路基础设计技术规程: DL/T 5219—2014[S]. 北京: 中国电力出版社, 2014.
Technical code for design foundation of overhead transmission line: DL/T 5219—2014[S]. Beijing: China Electric Power Press, 2014.
[8] 程永锋, 郑卫锋, 张强, 等. 输电线路装配式基础应用研究[J]. 中国电力, 2016, 49(8): 26-30.
CHENG Yong-feng, ZHENG Wei-feng, ZHANG Qiang, etc,. Application research on assembly foundation in transmission line engineering [J]. Electric Power, 2016, 49(8): 26-30.
[9] 鲁先龙, 郑卫锋, 程永锋, 等. 戈壁滩输电线路碎石土地基全掏挖基础试验研究[J]. 岩土工程学报, 2009, 31(11): 1779-1783.
LU Xian-long, ZHENG Wei-feng, CHENG Yong-feng, et al. Experimental study on excavated foundation of transmission line gravelly soils in gobi area of Northwest China[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(11): 1779-1783.
[10] 王炎民, 张克宝. 偏心基础在线路上的应用[J]. 电力建设, 1990, 11(10): 69-69.
Yan-min, ZHANG Ke-bao. Application of Eccentric foundation in transmission line[J]. Electric Power Construction, 1990, 11(10): 69-69.
[11] 王登科. 关于斜柱式基础外负荷确定方法的探讨[J]. 武汉大学学报(工学版), 2007, 40(s): 223-227.
WANG Deng-ke. Discussion on algorithm for determining loads of inclined plane foundations[J]. Engineering Journal of Wuhan University, 2007, 40(s): 223-227.
[12] 建筑地基基础设计技术规范: GB 50007—2011[S]. 北京: 中国建筑工业出版社, 2011.
Code for design of building foundation: GB 50007—2011[S]. Beijing: China Architecture and Building Press, 2011.
[13] 建筑基桩检测技术规范: JGJ 106—2003[S]. 北京: 中国建筑工业出版社, 2003.
Technical code for building foundation piles: JGJ 106—2003[S]. Beijing: China Architecture and Building Press, 2003.
[14] 架空输电线路杆塔结构设计技术规定: DL/T 5154—2012[S]. 北京: 中国电力出版社, 2013.
Technical code for design of tower and pole structures of overhead transmission line: DL/T 5154—2012[S]. Beijing: China Electric Power Press, 2013.

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