双排桩-连拱式组合结构受力机理分析
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摘要
针对双排桩-连拱式支护结构受力机理复杂的问题,提出了一种理论解法,在坑底以上,采用考虑桩土效应和空间拱效应的微分单元计算模型;坑底以下,采用弹性地基梁模型.随后通过建立有限元模型,对双排桩-连拱式结构的变形、受力特点进行分析,并将计算结果与理论计算结果进行对比.结果表明,在误差允许的范围内,理论计算的结果可作为工程设计和验算的参考依据.
Aiming at the complicated mechanics in the combination structure of double-row piles with arch, a theoretical solution is put forward. Above the bottom of the pit, the differential element calculation model considering the pile-soil effect and the space arch effect is adopted; below the bottom of the pit, the elastic foundation beam model is adopted. Then, by establishing the finite element model, the deformation and stress characteristics of the double-row pile-connected arch structure are analyzed, and the calculation results are compared with the theoretical calculation results. The results show that the theoretical calculation results can be used as reference for engineering design and verification within the allowable range of error.
Aiming at the complicated mechanics in the combination structure of double-row piles with arch, a theoretical solution is put forward. Above the bottom of the pit, the differential element calculation model considering the pile-soil effect and the space arch effect is adopted; below the bottom of the pit, the elastic foundation beam model is adopted. Then, by establishing the finite element model, the deformation and stress characteristics of the double-row pile-connected arch structure are analyzed, and the calculation results are compared with the theoretical calculation results. The results show that the theoretical calculation results can be used as reference for engineering design and verification within the allowable range of error.
引文
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[ 9 ] 张虎元,李秀祥. 黄土基坑双排桩支护结构的有限元分析[J]. 地下空间与工程学报, 2016, 12(4): 1102-1109.ZHANG Huyuan, LI Xiuxiang. The finite element analysis on the retaining structure for loess foundation pit with double-row piles[J]. Chinese Journal of Underground Space & Engineering, 2016,12(4): 1102-1109. (in Chinese)
[10] 李守德,俞洪良. GOODAM接触面单元的修正与探讨[J]. 岩石力学与工程学报,2004,23(15):2628-2631.LI Shoude, YU Hongliang. Modification of GOODMAN interface element[J]. Chinese Journal of Rock Mechanics & Engineering,2004,23(15):2628-2631. (in Chinese)
[11] 杨文.水泥土连拱支护结构的数值模拟及性状分析[D].郑州:郑州大学,2007.
[12] 李广信. 高等土力学[M]. 北京:清华大学出版社,2004,7.
[13] 丁文胜. 长条形基坑支护结构内力及变形分析[J]. 江苏科技大学学报(自然科学版),2001,15(4): 42-45.DING Wensheng. Analysis of internal forces and deformation of rectangular deep excavation[J]. Journal of Jiangsu University of Science and Technology (Natural Science Edition), 2001,15(4): 42-45. (in Chinese)
[ 2 ] 陈德文,戴国亮,白永生,等. 连拱式组合拱支护结构空间受力性能分析[J]. 建筑结构, 2004,34(3):62-65.CHEN Dewen, DAI Guoliang, BAI Yongsheng, et al. Analysis of space performance of even arch combined arch support structure[J]. Building Structure, 2004,34(3):62-65. (in Chinese)
[ 3 ] 史海莹. 双排桩支护结构研究现状[D].杭州:浙江大学,2010.
[ 4 ] 熊伟芬. 深基坑双排桩支护结构计算模式与数值模拟研究[D].武汉:武汉理工大学,2010.
[ 5 ] 郑刚,李欣,流畅,等. 考虑桩土相互作用的双排桩分析[J]. 建筑结构学报, 2004,25(1):99-103. DOI: 10.3321/j.issn:1000-6869.2004.01.014.ZHENG Gang, LI Xin, LIU Chang,et al.Analysis of double-row piles in consideration of the pile-soil interaction [J]. Journal of Building Structure,2004,25(1):99-103. DOI: 10.3321/j.issn:1000-6869.2004.01.014. (in Chinese)
[ 6 ] 刘帅栋. 门式框架结构双排桩内力分析及计算[D]. 长沙:湖南大学,2012.
[ 7 ] YU X, ZHOU Y F, PENG S Z. Staility analysis of dam abutments by 3D elasto-plastic finite-element method:a case tudy of Houhe gravity-arch dam in China[J]. Rock Mechanics and Mining Sciences,2005(42):415-430. DOI: 10.1016/j.ijrmms.2005.01.001.
[ 8 ] 刘泉声,付建军. 考虑桩土效应的双排桩模型及参数研究[J]. 岩土力学, 2011,32(2):481-473. DOI: 10.3969/j.issn.1000-7598.2011.02.027.LIU Quanshen, FU Jianjun. Research on model and parameters of double-row piles based on effect of pile-soil contact[J]. Rock & Soil Mechanics, 2011, 32(2):481-473. DOI: 10.3969/j.issn.1000-7598.2011.02.027. (in Chinese)
[ 9 ] 张虎元,李秀祥. 黄土基坑双排桩支护结构的有限元分析[J]. 地下空间与工程学报, 2016, 12(4): 1102-1109.ZHANG Huyuan, LI Xiuxiang. The finite element analysis on the retaining structure for loess foundation pit with double-row piles[J]. Chinese Journal of Underground Space & Engineering, 2016,12(4): 1102-1109. (in Chinese)
[10] 李守德,俞洪良. GOODAM接触面单元的修正与探讨[J]. 岩石力学与工程学报,2004,23(15):2628-2631.LI Shoude, YU Hongliang. Modification of GOODMAN interface element[J]. Chinese Journal of Rock Mechanics & Engineering,2004,23(15):2628-2631. (in Chinese)
[11] 杨文.水泥土连拱支护结构的数值模拟及性状分析[D].郑州:郑州大学,2007.
[12] 李广信. 高等土力学[M]. 北京:清华大学出版社,2004,7.
[13] 丁文胜. 长条形基坑支护结构内力及变形分析[J]. 江苏科技大学学报(自然科学版),2001,15(4): 42-45.DING Wensheng. Analysis of internal forces and deformation of rectangular deep excavation[J]. Journal of Jiangsu University of Science and Technology (Natural Science Edition), 2001,15(4): 42-45. (in Chinese)
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