Abstract：There are huge differences in internal force and deformation between the front and back rows of double-row anti-slide piles, so they cannot display their sliding resistances simultaneously and adequately. The slide may originate from pile head in the slope reinforced by deeply buried anti-slide piles. In order to solve the above problems, a new concept is put forward that the double-row piles with shorter back row can be used. A finite element model is established and the maximum bending moments and shear forces in the front and back rows of piles with different embedded depths of back row are obtained and discussed. It is indicated that the maximum bending moments, shear forces and deformation degree in the front row of piles are close to those in the back row when the embedded depth in back row increases to a certain value, and this value can be regarded as the design embedded depth. Through comparison with those of several common anti-sliding piles, the internal force and deformation in the front and back rows of the proposed piles are more reasonable, and the two rows of piles can display their sliding resistances adequately. The internal forces are relatively small, and the counter bending moments can be avoided. What’s more, it can save materials and reduce the cost.
申永江, 杨明, 项正良. 双排长短组合桩与常见双排桩的对比研究[J]. 岩土工程学报, 2015, 37(zk2): 96-100.
SHEN Yong-jinag, YANG Ming, XIANG Zheng-liang. Comparative study on double-row piles with different lengths several common anti-slide piles. Chinese J. Geot. Eng., 2015, 37(zk2): 96-100.
[1] 赵尚毅, 郑颖人, 李安洪, 等. 多排埋入式抗滑桩在武隆县政府滑坡中的应用[J]. 岩土力学, 2009, 30(增刊1): 160-164. (ZHAO Shang-yi, ZHENG Ying-ren, LI An-hong, et al. Application of multi-row embedded anti-slide piles to landslide of Wulong county government[J]. Rock and Soil Mechanics, 2009, 30(S1): 160-164. (in Chinese)) [2] 雷文杰. 沉埋桩加固滑坡体的有限元设计方法与大型物理模型试验研究[D]. 武汉: 中科院武汉岩土力学研究所, 2006. (LEI Wen-jie. Study on design method of deeply buried piles stabilizing slides and large-scale model test[D]. Wuhan: Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 2006. (in Chinese)) [3] 申永江, 吕 庆, 尚岳全. 桩排距对双排抗滑桩内力的影响[J]. 岩土工程学报, 2008, 30(7): 1033-1037. (SHEN Yong-jiang, LU Qing, SHANG Yue-quan. Effect of pile row distance on internal stress of double-row anti-slide piles[J]. China Journal of Geotechnical Engineering, 2008, 30(7): 1033-1037. (in Chinese)) [4] 唐 芬, 郑颖人, 杨 波. 双排抗滑桩的推力分担及优化设计[J].岩石力学与工程学报, 2010, 29(增刊1): 3162-3168. (TANG Fen, ZHENG Ying-ren, YANG Bo. Thrust share ratios and optimization design for two-rowanti-slide piles[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S1): 3162-3168. ( in Chinese) ) [5] 熊治文, 马 辉, 朱海东. 全埋式双排抗滑桩的受力分布[J]. 路基工程, 2002, 102(3): 5-11. (XIONG Zhi-wen, MA Hui, ZHU Hai-dong. The distribution of mechanical properties in double-row embedded anti-slide piles[J]. Subgrade Engineering, 2002, 102(3): 5-11. (in Chinese)) [6] 徐 骏, 李安洪, 赵晓彦. 大型滑坡桩排推力分担比离心模型试验研究[J]. 路基工程, 2010, 3: 57-59. (XU Jun, LI An-hong, ZHAO Xiao-yan. Large-scale landsides thrust share ratios studied by centrifugal model test[J]. Subgrade Engineering, 2010, 3: 57-59. (in Chinese)) [7] 宋雅坤, 郑颖人, 雷文杰. 沉埋式抗滑桩机制模型试验数值分析研究[J]. 岩土力学, 2007, 28(增刊): 63-68. (SONG Ya-kun, ZHENG Ying-ren, LEI Wen-jie. Analysis of the experimental mechanism of deeply buried anti-slide pile by FEM[J]. Rock and Soil Mechanics, 2007, 28(S0): 63-68.(in Chinese)) [8] 雷文杰, 郑颖人, 冯夏庭. 滑坡加固系统中沉埋桩的有限元极限分析研究[J]. 岩石力学与工程学报, 2006, 25(1): 28-33. (LEI Wen-jie, ZHENG Ying-ren, FENG Xia-ting. Limit analysis of slope stabilized by deeply buried piles with finite element method[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(1): 27-33. (in Chinese)) [9] 雷文杰, 郑颖人, 冯夏庭. 沉埋桩的有限元设计方法探讨[J].岩石力学与工程学报, 2006, 25(增刊1): 2924-2929. (LEI Wen-jie, ZHENG Ying-ren, FENG Xia-ting. Study on finite element design method of slope stabilized by deeply buried piles[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S1): 2924-2929. (in Chinese)) [10] 雷文杰, 郑颖人, 王恭先, 等. 沉埋桩加固滑坡体模型试验的机制分析[J]. 岩石力学与工程学报, 2007, 26(7): 1347-1355. (LEI Wen-jie, ZHENG Ying-ren, WANG Gong-xian, et al. Mechanism analysis of slope reinforcement with deeply buried piles with model test[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(7): 1347-1355. (in Chinese)) [11] 张晓曦, 何思明, 尹平保. 沉埋式抗滑桩优化设计研究[J].土木工程学报, 2012, 45(12): 143-149. (ZHANG Xiao-xi, HE Si-ming, YIN Ping-bao. Study on optimal design of deeply buried piles[J]. China Civil Engineering Journal, 2012, 45(12): 143-149. (in Chinese)) [12] 陈卫兵, 郑颖人, 雷文杰. 沉埋桩加固滑坡体模型试验的三维有限元模拟[J]. 岩土力学, 2007, 28(增刊): 273-276. (CHEN Wei-bing, ZHENG Ying-ren, LEI Wen-jie. 3-D finite element simulation of slope model test stabilized by deeply buried piles[J]. Rock and Soil Mechanics, 2007, 28(S0): 273-276. (in Chinese)) [13] 陈育民, 徐鼎平. FLAC/FLAC 3D 基础与工程实例[M]. 北京: 中国水利水电出版社, 2008. (CHEN Yu-min, XU Ding-ping. The basic knowledge and engineering examples of FLAC/FLAC 3D [M]. Beijing: China Water & Power Press, 2008. (in Chinese)) [14] 郑 轩, 孔令伟. 连续桩键结构的抗滑机制及加固效果研究[J].岩土力学, 2014, 35(9): 2616-2622. (ZHENG Xuan, KONG Ling-wei. Research on anti-slide mechanism and reinforcement Effects of continuous pile-plug structure[J]. Rock and Soil Mechanics, 2014, 35(9): 2616-2622. (in Chinese)) [15] 申永江, 孙红月, 尚岳全, 等. 锚索双排桩与刚架双排桩的对比研究[J]. 岩土力学, 2011, 32(6): 1838-1842. (SHEN Yong-jiang, SUN Hong-yue, SHANG Yue-quan, et al. Comparative study of anchor double-row piles and frame double-row piles[J]. Rock and Soil Mechanics, 2011, 32(6): 1838-1842. (in Chinese))
