输电线路掏挖基础承载特性离心机试验研究

doi:10.13722/j.cnki.jrme.2020.0270

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Abstract The excavated foundations have been widely used in transmission line construction. The bearing capacity characteristics of excavated foundations in stiff clay under different loading conditions are investigated in this study by a series of centrifugal model tests. The results show that the failure mode of foundation soil under solo uplift loading is affected by the embedment ratio of foundations and the critical embedment ratio is between 2 and 3. For high outcropping foundations，the horizontal bearing capacity will reduce significantly with increasing the dimensionless outcropping height. The ultimate uplift capacity of no outcropping foundations with an embedment ratio of 2 will increase to some extent when the horizontal load is applied first. The greater the horizontal load，the stronger the uplift capacity. Under the same horizontal load at the foundation top and the same moment at the ground point before pullout，the ultimate uplift resistance of outcrop foundations with an embedment ratio of 2 has a difference no more than 10% with that of no outcrop foundations，which indicates that the moment of outcrop foundations at the ground point has no obvious influence on the uplift resistance under combined uplift and horizontal loading. The research work can provide a reference for the design of excavated foundations of transmission lines in various loading cases.

Key words： foundation engineering excavated foundation stiff cohesive soil centrifuge model test combined loading bearing capacity

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	Articles by authors
	HAO Dongxue1
	LIU Zhujiang2
	CHEN Rong1
	XUE Yan2
	ZHAO Wei3

Cite this article:

HAO Dongxue1,LIU Zhujiang2,CHEN Rong1, et al. Centrifuge model test study on bearing capacity of excavated foundations of transmission lines#br#[J]. , 2020, 39(9): 1921-1929.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0270 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I9/1921

[1] 鲁先龙，程永锋，张宇. 输电线路原状土基础抗拔极限承载力计算[J]. 电力建设，2006，27(10)：28–32.(LU Xianlong，CHENG Yongfeng，ZHANG Yu. Calculation on ultimate uplift bearing capacity of undisturbed soil foundation in transmission lines[J]. Electric Power Construction，2006，27(10)：28–32.(in Chinese))
[2] 郝冬雪，张永建，陈榕，等. 输电线路掏挖基础极限上拔承载力变分解法[J]. 岩土力学，2015，36(1)：163–170.(HAO Dongxue，ZHANG Yongjian，CHEN Rong，et al. Variational solution of ultimate uplift capacity for excavated foundation of transmission tower[J]. Rock and Soil Mechanics，2015，36(1)：163–170.(in Chinese))
[3] 中华人民共和国电力行业标准. DL/T 5219—2014架空输电线路基础设计技术规程[S]. [S. l.]：[s. n.]，2014.(The Professional Standard Compilation Group of the People′s Republic of China DL/T 5219—2014 Technical regulation for designing foundation of overhead transmission line[S]. [S. l.]：[s. n.]，2014.(in Chinese))
[4] RANDOLPH M F，JAMIOLKOWSKI M B，ZDRAVKOVI? L. Load carrying capacity of foundations[C]// Advances in Geotechnical Engineering-The Skempton Conference. London：Thomas Telford Limited，2004：207–240.
[5] FENG X，GOURVENEC S，RANDOLPH M F，et al. Effectiveness of effective area method for assessing undrained capacity of shallow rectangular foundations[J]. Journal of Geotechnical and Geoenvironmental Engineering，ASCE，2019，145(2)：06018013–1–06018013–10.
[6] 崔强，张振华，安占礼，等. 组合荷载作用下扩底基础地基土体破坏模式及滑动面几何特征分析[J]. 电网与清洁能源，2013，29(3)：12–18.(CUI Qiang，ZHANG Zhenhua，AN Zhanli，et al. Analysis on the failure mechanism of soil and sliding surface geometric feature of expanding bottom foundation under combined loads[J]. Power System and Clean Energy，2013，29(3)：12–18.(in Chinese))
[7] 文松霖. 扩底桩承载力空间屈服包络面的基本特性[J]. 岩土力学，2006，27(8)：1 229–1 234.(WEN Songlin. Three dimensional failure envelope behavior of pedestal piles[J]. Rock and Soil Mechanics，2006，27(8)：1 229–1 234.(in Chinese))
[8] 文松霖，柴红涛，顾颖. 水平、弯矩荷载作用下桩基承载特性的离心模型试验研究[J]. 长江科学院院报，2012，29(11)：50–54.(WEN Songlin，CHAI Hongtao，GU Ying. Centrifugal model test on resistance behavior of pile foundation under horizontal load and moment load[J]. Journal of Yangtze River Scientific Research Institute，2012，29(11)：50–54.(in Chinese))
[9] 赵春风，王卫中，赵程，等. 组合荷载下单桩承载特性现场试验[J]. 中国公路学报，2013，26(6)：59–64.(ZHAO Chunfeng，WANG Weizhong，ZHAO Cheng，et al. Field test study on bearing capacity of single pile under combined loads[J]. China Journal of Highway and Transport，2013，26(6)：59–64.(in Chinese))
[10] 赵春风，刘丰铭，邱志雄，等. 砂土中竖向和水平荷载共同作用下的单桩承载特性研究[J]. 岩土工程学报，2015，37(1)：183–190.(ZHAO Chunfeng，LIU Fengming，QIU Zhixiong，et al. Study on bearing behavior of a single pile under combined vertical and lateral loads in sand[J]. Chinese Journal of Geotechnical Engineering，2015，37(1)：183–190.(in Chinese))
[11] LU W J，ZHANG G. Influence mechanism of vertical-horizontal combined loads on the response of a single pile in sand[J]. Soils and Foundations，2018，58(5)：1 228–1 239.
[12] 皇甫明，王幼青，王梦恕. 水平力对竖直桩沉降和承载力影响的研究[J]. 岩土工程学报，2003，25(4)：511–513.(HUANG Fuming，WANG Youqing，WANG Mengshu. Study of effects of lateral loads on the settlement and bearing capacity of pile[J]. Chinese Journal of Geotechnical Engineering，2003，25(4)：511–513.(in Chinese))
[13] 皇甫明，王幼青，张军. 纵横向荷载作用下桩的工作性状研究[J]. 哈尔滨工业大学学报，2003，35(6)：743–746.(HUANG Fuming，WANG Youqing，ZHANG Jun. Behavior of pile under combined axial and lateral loading[J]. Journal of Harbin Institute of Technology，2003，35(6)：743–746.(in Chinese))
[14] REDDY M K，AYOTHIRAMAN R. Experimental studies on behavior of single pile under combined uplift and lateral loading[J]. Journal of Geotechnical and Geoenvironmental Engineering，2015，141(7)：04015030–1–04015030–10.
[15] 徐光明，章为民. 离心模型中的粒径效应和边界效应研究[J]. 岩土工程学报，1996，18(3)：80–86.(XU Guangmin，ZHANG Weimin. Particle size effect and boundary effect in centrifugal model[J]. Chinese Journal of Geotechnical Engineering，1996，18(3)：80–86.(in Chinese))
[16] LEHANE B M，GAUDIN C，RICHARDS D J，et al. Rate effects on the vertical uplift capacity of footings founded in clay[J]. Geotechnique，2008，58(1)：13–21.
[17] 李元海，朱合华，上野胜利，等. 基于图像相关分析的砂土模型试验变形场量测[J]. 岩土工程学报，2004，26(1)：36–41.(LI Yuanhai，ZHU Hehua，KATSUTOSHI Ueno，et al. Deformation field measurement for granular soil model using image analysis[J]. Chinese Journal of Geotechnical Engineering，2004，26(1)：36–41.(in Chinese))
[18] 张嘎，张建民，梁东方. 土与结构接触面试验中的土颗粒细观运动测量[J]. 岩土工程学报，2005，27(8)：903–907.(ZHANG Ga，ZHANG Jianmin，LIANG Dongfang. Measurement of soil particle movement in soil-structure interface test[J]. Chinese Journal of Geotechnical Engineering，2005，27(8)：903–907.(in Chinese))
[19] QIN H Y，GUO W D. Nonlinear response of laterally loaded rigid piles in sand[J]. Geomechanics and Engineering，2014，7(6)：679–703.
[20] 薛琰. 复合加载模式下输电线路掏挖基础承载特性数值分析[硕士学位论文][D]. 吉林：东北电力大学，2018.(XUE Yan. Numerical analysis of bearing behavior of excavated foundation in transmission line under combined loads[M. S. Thesis][D]. Jilin：Northeast Electric Power University，2018.(in Chinese))