板间距对风积沙金属装配式基础上拔承载力影响研究

doi:10.13722/j.cnki.jrme.2021.1229

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摘要新能源电力工程建设的发展，正推动金属装配式基础在风积沙地区的应用，底板间距的设计关系到上拔承载力的计算与成本控制。为此，在风积沙地基中开展真型试验与活动门试验，研究板间距与板宽之比为1.0，1.5和2.0情况下，基础的承载力、应力、周边土压力变化规律及板间土拱发展规律。结果表明，金属装配式基础的上拔承载力随板间距增大而线性减小；支架应力随板间距增大而减小，随距底板高度增大而增大，底板应力变化与支架相反，最大应力多出现于板条悬挑处；板间距对基础破裂面位置几乎无影响，反算的上拔角为20°；活动门试验发现，板间距越大，土拱越高，板间损失土体的体积越大，导致基础抗力损失越多；考虑板间土拱效应对土重法进行修正，计算结果更接近上拔承载力实测值。研究成果可为金属装配式基础板间距的合理设计提供参考依据。

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	张程程1
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	刘观仕2
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	徐国方2

关键词 ：土力学, 风积沙, 金属装配式基础, 板间距, 土拱效应, 上拔承载力

Abstract：New energy power engineering construction is promoting the application of metal grillage foundations in aeolian sand areas. The design of the slab spacing involves the calculation of uplift bearing capacity and cost control. Therefore，full-scale uplift tests and trapdoor experiments for grillage foundations were carried out in aeolian sand. The variation in bearing capacity，stress and surrounding soil pressure of foundations as well as the development of the soil arch between the slabs，were investigated in the cases of the ratios of the slab spacing to the slab width of 1.0，1.5 and 2.0. The results show that：(1) the uplift bearing capacity of metal grillage foundations decreases linearly with the slab spacing；(2) the stress in the support decreases with the slab spacing，while increases with the height from the bottom slab. The change of the stress in the bottom slabs is opposite to that in the support，and the maximum stress mostly appears in the cantilever parts of the slabs；(3) the slab spacing has little effect on the location of the sliding plane，and the back-calculated angle of the slip plane to the horizontal is 20°；(4) the results of trapdoor experiment indicate that the larger the slab spacing is，the higher the soil arch is and the larger the lost volume of soil between the slabs is resulting in increasing loss of the foundation resistance；(5) considering the soil arching effect between the slabs，the soil weight method is modified，and the calculated results are closer to the tested uplift bearing capacity. The research can provide references for optimal slab spacing in grillage foundation design.

Key words： soil mechanics aeolian sand metal grillage foundation slab spacing soil arching effect uplift bearing capacity

引用本文:

张程程1，2，刘观仕2，杨景胜3，赵青松1，2，徐国方2. 板间距对风积沙金属装配式基础上拔承载力影响研究[J]. 岩石力学与工程学报, 2022, 41(10): 2149-2160.
ZHANG Chengcheng1，2，LIU Guanshi2，YANG Jingsheng3，ZHAO Qingsong1，2，XU Guofang2. Influence of slab spacing on uplift bearing capacity of metal grillage foundations in aeolian sand. , 2022, 41(10): 2149-2160.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1229 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I10/2149

[34]	TAGAYA K，SC OTT R F，ABOSHI H. Pullous.Resistance of buried anchor in sand[J]. Soils and Foundations，1998，28(3)：114–130.
[6]	张大长，蒋刚，林致添，等. 装配式型钢基础抗压抗拔承载力的试验及计算[J]. 岩土力学，2009，30(7)：2 096–2 100.(ZHANG Dachang，JIANG Gang，LIN Zhitian，et al. Experimental studies and calculating method for compression and uplift capacities of fabricated steel foundation[J]. Rock and Soil Mechanics，2009，30(7)：2 096–2 100.(in Chinese))
[7]	STEWART H E，KULHAWY F H. Field evaluation of grillage foundation uplift capacity[R]. United States：[s. n.]，1990.
[9]	程永锋，郑卫锋，鲁先龙，等. 输电线路装配式基础下压计算时底面积取值研究[J]. 岩土力学，2016，37(增1)：477–481.(CHENG Yongfeng，ZHENG Weifeng，LU Xianlong，et al. Research on criteria to define bottom area of assembled foundation of transmission line in calculation of compressive load[J]. Rock and Soil Mechanics，2016，37(Supp.1)：477–481.(in Chinese))
[1]	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 Yongfeng，ZHENG Weifeng，ZHANG Qiong，et al. Application researchon on assembly foundation of transmission lines[J]. Electric Power，2016，49(8)：26–30.(in Chinese))
[3]	王永华，丁士君，郭永胜，等. 沙漠地区输电线路装配式基础设计及应用[J]. 电力建设，2010，31(11)：14–17.(WANG Yonghua，DING Shijun，GUO Yongsheng，et al. The design and application of assembly foundation of transmission line in desert area[J]. Electric Power Construction，2010，31(11)：14–17.(in Chinese))
[5]	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)：3 230–3 236.(CHENG Yongfeng，DING Shijun. Prototype tests of assembly foundation of transmission line in aeolian sand area[J]. Rock and Soil Mechanics，2012，33(11)：3 230–3 236.(in Chinese))
[8]	丁士君，鲁先龙，程永锋，等. 青藏联网工程冻土地基装配式基础载荷试验研究[J]. 中国电力，2012，45(12)：42–47.(DING Shijun，LU Xianlong，CHENG Yongfeng，et al. Loading test of the assembly foundation in frozen soil of the qinghai-tibet AC and DC interconnection project[J]. Electric Power Construction，2012，45(12)：42–47.(in Chinese))
[11]	BRANSBY M F， KNAPPETT J A，BROWN M J，et al. The vertical capacity of grillage foundations[J]. Géotechnique，2012，62(3)：201–211.
[13]	BAZáN-ZURITA E，WILLIAMS D M，BLEDSOE J K，et al. AEP's 765 kV Transmission Line，LRFD Approach for Foundations[C]//. Electrical Transmission Line and Substation Structures，Structural Reliability in a Changing World. [S. l.]：[s. n.]，2007：195–206.
[15]	刘观仕，肖飞，徐国方. 沙漠地区输电线路金属装配式基础分析与试验研究—最大板条间距确定的理论方法研究报告[R]. 武汉：中国科学院武汉岩土力学研究所，2020.(LIU Guanshi，XIAO Fei，XU Guofang. Analysis and experimental research on the metal grillage foundation of transmission lines in desert areas-research report on theoretical methods of determining large lath spacing[R]. Wuhan：Wuhan Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2020.(in Chinese))
[2]	TRAUTMANN C H，KULHAWY F H. Uplift load-displacement behavior of spread foundations[J]. Journal of Geotechnical Engineering，1988，114(2)：168–184.
[4]	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)：2 359–2 364.(QIAN Zengzhen，LU Xianlong，DING Shijun. Experimental study of assembly foundation for transmission line tower in Taklimakan desert[J]. Rock and Soil Mechanics，2011，32(8)：2 359–2 364.(in Chinese))
[12]	冯衡，高斐略，刘观仕，等. 风积沙地基金属装配式基础的真型试验研究[J]. 岩土力学，2021，42(12)：3 328–3 334.(FENG Heng，GAO Feilüe，LIU Guanshi，et al. Full-scale tests of steel grillage foundation in aeolian sand areas[J]. Rock and Soil Mechanics，2021，42(12)：3 328–3 334.(in Chinese))
[14]	国家电网公司. 国家电网公司输变电工程通用设计：输电线路装配式基础分册[M]. 北京：中国电力出版社，2016：1–293.(State Grid Corporation of China. General design of power transmission and transformation project of State Grid Corporation of China: Transmission line grillage foundation sub-volume[M]. Beijing：China Electric Power Press，2016：1–293.(in Chinese))
[16]	中华人民共和国行业标准编写组. DL/T5219—2005 架空送电线路基础设计技术规定[S]. 北京：中国电力出版社，2005.(The Professional Standards Compilation Group of People?s Republic of China. DL/T5219－2005 Technical regulations for basic design of overhead transmission lines[S]. Beijing：China Electric Power Press，2005.(in Chinese))
[10]	BRANSBY M F，BROWN M J，KNAPPETT J A，et al. Vertical capacity of grillage foundations in sand[J]. Canadian geotechnical journal，2011，48(8)：1 246–1 265.
[17]	刘文白，刘占江，曹玉生，等. 沙漠地区输电线路铁塔基抗拔试验[J]. 岩土工程学报，1999，21(5)：564–568.(LIU Wenbai，LIU Zhanjiang，CAO Yusheng，et al. Uplift test of foundation of electric power line tower in desert area[J]. Chinese Journal of Geotechnical Engineering，1999，21(5)：564–568.(in Chinese))
[19]	TERZAGHI K. Stress distribution in dry and in saturated sand above a yielding trap-door[C]// Proceedings of the 1st International Conference on Soil Mechanics and Foundation Engineering. [S. l.]：[s. n.]，1936：307–311.
[20]	周东. 基于透明土材料的被动桩模型试验和数值模拟研究[硕士学位论文][D]. 重庆：重庆大学，2019.(ZHOU Dong. Study on passive pile based on transparent soil model test and numerical simulation[M. S. Thesis][D]. Chongqing：Chongqing University，2019.(in Chinese))
[22]	LAI H J，ZHENG J J，CUI M J，et al. “Soil arching” for piled embankments：insights from stress redistribution behaviour of DEM modelling[J]. Acta Geotechnica，2020，15(8)：2 117–2 136.
[24]	KHATAMI H，DENG A，JAKSA M. Passive arching in rubberized sand backfills[J]. Canadian Geotechnical Journal，2020，57(4)：549–567.
[26]	王卫东，吴江斌，许亮，等. 软土地区扩底抗拔桩承载特性试验研究[J]. 岩土工程学报，2007，29(9)：1 418–1 422.(WANG Weidong，WU Jiangbin，XU Liang，et al. Full-scale field tests on uplift behavior of piles with enlarged base[J]. Chinese Journal of Geotechnical Engineering，2007，29(9)：1 418–1 422.(in Chinese))
[27]	邵光辉，赵志峰，吴正余. 托底抗拔桩承载特性的模型试验研究[J]. 岩土工程学报，2016，38(6)：1 140–1 146.(SHAO Guanghui，ZHAO Zhifeng，WU Zhengyu. Model tests on shaft capacity properties of bottom uplift pile[J]. Chinese Journal of Geotechnical Engineering，2016，38(6)：1 140–1 146.(in Chinese))
[29]	RUI R，VAN TOL A F，XIA Y Y，et al. Investigation of soil-arching development in dense sand by 2D model tests[J]. Geotechnical Testing Journal，2016，39(3)：415–430.
[30]	SHELKE A，PATRA N R. Effect of arching on uplift capacity of pile groups in sand[J]. International Journal of Geomechanics，2008，8(6)：347–354.
[32]	乾增珍，鲁先龙，丁士君. 上拔与水平力组合作用下加筋风积沙斜柱扩展基础试验[J]. 岩土工程学报，2011，33(3)：373–379.(QIAN Zengzhen，LU Xianlong，DING Shijun. Experiments on pad and chimney foundation in reinforced aeolian sand under uplift combined with horizontal loads[J]. Chinese Journal of Geotechnical Engineering，2011，33(3)：373–379.(in Chinese))
[36]	费康，陈毅，王军军. 桩承式路堤中填土破坏模式研究[J]. 重庆交通大学学报：自然科学版，2011，30(2)：258–262.(FEI Kang，CHEN Yi，WANG Junjun. Failure modes in fill of pile-supported embankments[J]. Journal of Chongqing Jiaotong University：Natural Science Edition，2011，30(2)：258–262.(in Chinese))
[37]	肖飞，孔令伟，刘观仕，等. 中密风积沙地层金属装配式基础抗拔模型试验与承载力改进计算方法[J]. 岩土力学，2022，43(1)：65–75.(XIAO Fei，KONG Lingwei，LIU Guanshi，et al. Uplift model test and capacity calculation method of metal grillage foundation in medium dense aeolian sand[J]. Rock and Soil Mechanics，2022，43(1)：65–75.(in Chinese))
[18]	刘文白，田桥. 上拔荷载作用下的土体细观结构分析[J]. 岩石力学与工程学报，2007，26(增2)：4 311–4 318.(LIU Wenbai，TIAN Qiao. Analysis of soil meso-structure under uplift load[J]. Chinese Journal of Geotechnical Engineering，2007，26(Supp.2)：4 311–4 318. (in Chinese))
[23]	CHEVALIER B，COMBE G，VILLARD P. Experimental and discrete element modeling studies of the trapdoor problem: Influence of the macro-mechanical frictional parameters[J]. Acta Geotechnica：An International Journal for Geoengineering，2012，7(1)：15–39.
[25]	ZHANG Z，TAO F，HAN J，et al. Influence of surface footing loading on soil arching above multiple buried structures in transparent sand[J]. Canadian Journal of Civil Engineering，2021，48(2)：124–133.
[28]	董彬彬. 双排抗滑桩土拱效应分析[硕士学位论文][D]. 重庆：重庆大学，2014.(DONG Binbin. Analysis of soil arching effect of double-row anti-slide piles[M. S. Thesis][D]. Chongqing：Chongqing University，2014.(in Chinese))
[33]	邹亚洲. 粘土中抗拔基础模型试验及破坏机制分析[J]. 电力建设，1992，(4)：13–18.(ZOU Yazhou. Model test of uplift foundation in clay and analysis of failure mechanism[J]. Electric Power Construction，1992，(4)：13–18. (in Chinese))
[35]	雷文杰，张瑶，孙钦昂. 有限元极限分析法探讨裂隙拱形成机制[J]. 地下空间与工程学报，2011，7(6)：1 153–1 157.(LEI Wenjie，ZHANG Yao，SUN Qingang. Analysis on formation of roof fissure arch by limited FEM[J]. Chinese Journal of Underground Space and Engineeing，2011，7(6)：1 153–1 157.(in Chinese))
[38]	郑刚，王丽. 成层土中倾斜荷载作用下桩承载力有限元分析[J]. 岩土力学，2009，30(3)：680–687.(ZHENG Gang，WANG Li. Finite element analysis of bearing capacity of pile under inclined load in layered soil[J]. Rock and Soil Mechanics，2009，30(3)：680–687.(in Chinese))
[40]	苏荣臻，郑卫锋，鲁先龙. 输电线路钢结构装配式基础试验研究[J]. 建筑科学，2014，30(增2)：6–12.(SU Rongzhen，ZHENG Weifeng，LU Xianlong. Experimental research on assembly foundation of steel stmcture in transmission line engineering[J]. Building Science，2014，30(Supp.2)：6–12.(in Chinese))
[43]	RUI R，VAN TOL F，XIA Y，et al. Evolution of soil arching：2D analytical models[J]. International Journal of Geomechanics，2018，18(6)：04018056.
[45]	贾海莉，王成华，李江洪. 基于土拱效应的抗滑桩与护壁桩的桩间距分析[J]. 工程地质学报，2004，12(1)：98–103.(JIA Haili，WANG Chenghua，LI Jianghung. Analysis of pile spacing between anti—sloding piles and petaining piles in accordance with soil arcmng effect[J]. Journal of Engineering Geology，2004，12(1)：98–103.(in Chinese))
[21]	RUI R，YE Y，HAN J，et al. Two-dimensional soil arching evolution in geosynthetic-reinforced pile-supported embankments over voids[J]. Geotextiles and Geomembranes，2022，50(1)：82–98.
[31]	顾宝和，周红，朱小林. 深层平板静力载荷试验测定土的变形模量[J]. 工程勘察，2000，165(4)：1–2.(GU Baohe，ZHOU Hong，ZHU Xisolin. Determination of deformation modulus of soil by deep plate static load test[J]. Geotechnical Investigation and Surveying，2000，165(4)：1–2. (in Chinese))
[41]	CHEVALIER B，COMBE G，VILLARD P. Experimental and discrete element modeling studies of the trapdoor problem：influence of the macro-mechanical frictional paramters[J]. Acta Geotechnica，2012，7(1)：15–39.
[39]	KOERNER R M，LORD JR A E，DEUTSCH W L. Determination of prestress in granular soils using AE[J]. Journal of Geotechnical Engineering，1984，110(3)：346–358.
[42]	IGLESIA G R，EINSTEIN H H，WHITMAN R V. Investigation of soil arching with centrifuge tests[J]. Journal of Geotechnical and Geoenvironmental engineering，2014，140(2)：04013005.
[44]	CHEVALIER B，OTANI J. 3-D arching effect in the trap-door problem：A comparison between X-ray CT scanning and DEM analysis[C]// Proceedings of GeoFlorida 2010：Advances in Analysis， Modeling and Design. [S. l.]：[s. n.]，2010：570–579.