降雨条件下特高压输电线路基础安全稳定性研究

doi:10.16265/j.cnki.issn 1003-3033.2021.01.017

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (1): 116-124.doi: 10.16265/j.cnki.issn 1003-3033.2021.01.017

降雨条件下特高压输电线路基础安全稳定性研究

董建军副教授, 杨嫡, 郑高阳, 谢郑权

辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛 125105

收稿日期:2020-10-29 修回日期:2020-12-22 出版日期:2021-01-28 发布日期:2021-07-28
作者简介:董建军 (1978—),男,辽宁绥中人,博士,副教授,主要从事土木工程安全与防灾方面的研究。E-mail: dongjnjn@163.com。
基金资助:
国家自然科学基金资助(51479023);辽宁省教育厅科学研究经费项目(LJ2020JCL019)。

Research on safety and stability of UHV transmission line foundations under rainfall

DONG Jianjun, YANG Di, ZHENG Gaoyang, XIE Zhengquan

College of Safety Science & Engineering, Liaoning Technical University, Huludao Liaoning 125105, China

Received:2020-10-29 Revised:2020-12-22 Online:2021-01-28 Published:2021-07-28

摘要/Abstract

摘要： 为解决降雨影响特高压(UHV)输电线路杆塔基础的抗拔承载性能及安全稳定性问题,以现场试验获取的荷载-位移数据曲线和室内试验得到的土体参数为基础,根据饱和-非饱和土统一的渗流方程和抗剪强度方程,建立理论模型,并进行数值计算分析,得到与基础抗拔现场试验结果相吻合的数值计算结果;基于验证的理论模型,在不同降雨条件下,分析非饱和-饱和渗流场的演化特征、地基土体塑性区的发展以及基础抗拔承载性能的变化特征。结果表明:在降雨条件下,极限承载力在渗埋比相同的情况下与基础深径比相关,基础深径比变小,极限承载力会发生显著衰减,基础的安全稳定性变差。

关键词: 特高压 (UHV) 输电线路, 杆塔基础, 降雨条件, 安全稳定性, 非饱和

Abstract: In order to address impacts of rainfall on uplift bearing capacity and safety and stability of UHV transmission line pole and tower foundations, based on load-displacement data obtained from in-situ test and soil parameters obtained from laboratory test, a theoretical model was established according to seepage equation and unified shear strength equation for saturated and unsaturated soils. Then, numerical simulations and analysis were carried out by using the model, and simulation results were found to be in agreement with those of in-situ uplift tests. Finally, based on verified theoretical model, evolution characteristics of seepage field in both unsaturated and saturated soils, development of plasticity zone of soils, and changes in bearing capacity of foundations under different rainfall conditions were studied. The results show that ultimate bearing capacity is related to depth-to-diameter ratio of foundations when infiltration ratio remains the same, and it will be significantly reduced as depth-to-diameter ratio becomes smaller, causing safety and stability of foundations to decline.

Key words: ultra-high-voltage (UHV) transmission lines, pole and tower foundations, rainfall, safety and stability, unsaturated

中图分类号:

X946

董建军, 杨嫡, 郑高阳, 谢郑权. 降雨条件下特高压输电线路基础安全稳定性研究[J]. 中国安全科学学报, 2021, 31(1): 116-124.

DONG Jianjun, YANG Di, ZHENG Gaoyang, XIE Zhengquan. Research on safety and stability of UHV transmission line foundations under rainfall[J]. China Safety Science Journal, 2021, 31(1): 116-124.

参考文献

[1] 陈仁朋,张革强,孔令刚,等.饱和及非饱和粉土中扩底桩极限上拔承载力大尺寸模型试验研究[J].岩石力学与工程学报, 2010,29(5): 1 068-1 074.
CHEN Renpeng, ZHANG Geqiang, KONG Linggang, et al. Large-scale tests on uplift ultimate bearing capacities of enlarged base piles in saturated and unsaturated silty soils[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(5): 1 068-1 074.
[2] 张西,刘生奎,李永祥.黄土地基直柱掏挖基础浸水静载试验及设计优化[J].电力建设, 2013, 34(5): 17-21.
ZHANG Xi, LIU Shengkui, LI Yongxiang. Design optimization and water immersion static load test on undisturbed soil column foundation in collapsible loess soil[J]. Electric Power Construction, 2013, 34(5): 17-21.
[3] 袁乾坤,侯超群,殷永高,等.砂土地基中根式抗拔桩模型试验[J].安徽建筑,2019, 26(8): 181-184,187.
YUAN Qiankun, HOU Chaoqun, YIN Yonggao, et al. Model test of root - type tensile pile in sandy soil foundation[J]. Anhui Building, 2019, 26(8): 181-184,187.
[4] 龚靖,曹帅,张恩铭.斜压荷载作用下输电塔扩底桩稳定性数值分析[J].水电能源科学,2013,31(5):198-200,169.
GONG Jing, CAO Shuai, ZHANG Enming. Numerical analysis of the stability of transmission tower bottom pile under baroclinic load[J]. Hydroelectric Energy Science, 2013,31(5):198-200,169.
[5] 郑鑫轲,朱赛男,樊广辉,等. 扩底抗拔桩荷载传递规律及其影响因素分析[J].土工基础, 2015, 29(1): 24-27.
ZHENG Xinke, ZHU Sainan, FAN Guanghui, et al. Law of load transmission of pedestal tension pile and analysis of influencing factors[J]. Soil Engineering and Foundation, 2015, 29(1): 24-27.
[6] 常林越,王卫东,吴江斌.基于极限承载力试验的扩底抗拔桩承载特性数值模拟分析[J].岩土力学, 2015, 36(增1): 657-663.
CHANG Linyue, WANG Weidong, WU Jiangbin. Numerical simulation analysis of uplift behavior of enlarged base piles based on uplift ultimate bearing capacity tests [J]. Rock and Soil Mechanics, 2015, 36(S1): 657-663.
[7] 石磊,帅健,许葵,等.地基沉降及动水压对储罐屈曲强度的影响[J].中国安全科学学报,2019,29(11): 116-121.
SHI Lei, SHUAI Jian, XU Kui, et al. Influence of foundation settlement and dynamic water pressure on buckling strength of tank[J]. China Safety Science Journal,2019,29(11):116-121.
[8] 石磊,帅健,王晓霖,等.地基沉降对石油储罐象足屈曲的影响[J].中国安全科学学报, 2018, 28(9): 56-61.
SHI Lei, SHUAI Jian, WANG Xiaolin, et al. Effect of foundation settlement on elephant foot buckling of oil tank[J]. China Safety Science Journal, 2018, 28(9): 56-61.
[9] ALAWNEH A S, MALKAWI A I H, AL-DEEKY H. Tension tests on smooth and rough model piles in dry sand[J]. Canadian Geotechnical Journal, 1999, 36(4): 746-753.
[10] VANAPALLI S K, FREDLUND D G, PUFAHL D E, et al. Model for the prediction of shear strength with respect to soil suction[J]. Canadian Geotechnical Journal, 1996, 33(3): 379-392.
[11] 邵龙潭,郭晓霞,郑国锋.粒间应力、土骨架应力和有效应力[J]. 岩土工程学报,2015, 37(8): 1 478-1 483.
SHAO Longtan, GUO Xiaoxia, ZHENG Guofeng. Intergranular stress, soil skeleton stress and effective stress[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(8): 1 478-1 483.
[12] 赵成刚,张雪东.非饱和土中功的表述以及有效应力与相分离原理的讨论[J]. 中国科学:技术科学, 2008, 38(9): 1 453-1 463.
ZHAO Chenggang, ZHANG Xuedong. Description of work in unsaturated soils and discussion of the principle of effective stress and phase separation[J]. China Science: Technology Science,2008,38(9): 1 453-1 463.
[13] 董建军,王思萌,郭占勇,等.非饱和-饱和状态变化对土质边坡稳定性的影响研究[J].水利水电技术,2018,49(11): 179-187.
DONG Jianjun, WANG Simeng, GUO Zhanyong, et al. Study on the influence of unsaturated-saturated state change on soil slope stability[J].Water Resources and Hydropower Engineering,2018,49(11): 179-187.
[14] 董建军,王思萌,杨晓萧,等.基于非饱和-饱和渗流的降雨入渗边坡稳定性分析[J].水利与建筑工程学报,2018,16(6): 99-104.
DONG Jianjun, WANG Simeng, YANG Xiaoxiao, et al. Stability analysis of rainfall infiltration slope based on unsaturated - saturated seepage[J]. Journal of Hydraulic and Architectural Engineering,2018,16(6): 99-104.
[15] VAN G M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils1[J]. Soil Science Society of America Journal, 1980, 44(5): 892-898.
[16] MUALEM Y. A new model for predicting the hydraulic conductivity of unsaturated porous media[J]. Water Resources Research, 1976, 12(3): 513-522.
[17] GARDNER W R. Some steady state solutions of the unsaturated moisture flow equation with application to evaporation from a water table[J]. Soil Science, 1958, 85(4): 228-232.
[18] PHILIP J R. The quasilinear analysis, the scattering analog, and other aspects of infiltration and seepage[C]. Proceeding of Infiltration Development and Application, 1987: 1-27.
[19] TOMLINSON M, WOODWARD J. Pile design and construction practice:6th edition[M]. New York: CRC Press, 2014: 310-319.

降雨条件下特高压输电线路基础安全稳定性研究

Research on safety and stability of UHV transmission line foundations under rainfall

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