Field Full-scale Tests on Group Anchorage Rock Foundations of DC UHV Transmission Line Project

doi:10.11930/j.issn.1004-9649.2014.12.55.5

Abstract

Abstract: A new type of group anchorage rock foundation is presented according to the fact that the load of UHV DC transmission tower foundations are large and the scheme of unequal tower leg length with unequal height of foundation is widely used in the UHV DC transmission project. In addition, three uplift load tests were carried out on 2×2 bearing platforms with four bolts of different anchor length and rock-socked depth, and three load tests were also carried out on 3×3 bearing platforms with eight bolts of different anchor length and rock-socked depth under uplift combined with lateral loading. It is indicated that the lateral loading could reduce the uplift capacity of the group anchorage rock foundation obviously. Increseaing the bolt anchorage length or the rock-socked depth can effectively enhance the uplift and lateral bearing capacties of the group anchorage rock foundation.

Key words: UHV, DC, transmission line, tower foundations, rock anchor foundation, uplift, mountainous area

CLC Number:

TM75

CHENG Yong-feng, ZHAO Jiang-tao, LU Xian-long, ZHANG Yan, LI Wei, HOU Peng-xiang, HUANG Xin-huai. Field Full-scale Tests on Group Anchorage Rock Foundations of DC UHV Transmission Line Project[J]. Electric Power, 2014, 47(12): 55-60.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.12.55.5

https://www.electricpower.com.cn/EN/Y2014/V47/I12/55

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