机场滑坡抗滑桩原位测试与数值模拟分析
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摘要
本文以攀枝花机场13#滑坡治理工程为依托,通过原位测试与数值模拟,分析抗滑桩的受力以及变形,得到如下结论:(1)锚索抗滑桩所受弯矩随桩深变化近似呈抛物线状,弯矩计算最大值出现在滑带区域。锚索抗滑桩在滑带以上区域弯矩变化表现有不同程度突变,在滑带以下区域弯矩变化较平缓。(2)利用矩形截面受弯构件计算的抗滑桩弯矩曲线与数值模拟分析计算的弯矩曲线表现规律大体一致,且弯矩最大值相差不大,表明了利用双截面受弯构件理论计算抗滑桩内力的适用性。(3)根据原位测试监测数据结果以及数值模拟结果中锚索抗滑桩桩顶位移变化,表明了锚索抗滑桩在治理滑坡工程中发挥了抗滑支挡的独特功能,对保持坡体稳定性发挥了重要作用。
Based on the 13# landslide control project of Panzhihua airport, the stress and deformation of anti slide piles are analyzed by in-situ test and numerical simulation. The following conclusions are obtained:(1) the bending moment of anchor cable anti slide pile is approximately parabolic with the change of pile depth and the maximum value of bending moment appears in the slip zone. There are different degrees of change in bending moment of anchor cable anti slide pile in the above slip zone and the bending moment changes gently in the area below the slip zone.(2) The bending moment curve of the anti slide pile calculated by the rectangular section bending member is in general agreement with the calculation of the bending moment curve, and there is little difference in maximum bending moment. It shows the applicability of the theory of double section flexural members to calculate the internal forces of anti slide piles.(3) According to the in-situ test monitoring data and the displacement variation of the anchor cable anti-slide pile in the numerical simulation results,It shows that the anchor cable anti slide pile plays a unique role in the landslide control project and plays an important role in maintaining the stability of the slope.
Based on the 13# landslide control project of Panzhihua airport, the stress and deformation of anti slide piles are analyzed by in-situ test and numerical simulation. The following conclusions are obtained:(1) the bending moment of anchor cable anti slide pile is approximately parabolic with the change of pile depth and the maximum value of bending moment appears in the slip zone. There are different degrees of change in bending moment of anchor cable anti slide pile in the above slip zone and the bending moment changes gently in the area below the slip zone.(2) The bending moment curve of the anti slide pile calculated by the rectangular section bending member is in general agreement with the calculation of the bending moment curve, and there is little difference in maximum bending moment. It shows the applicability of the theory of double section flexural members to calculate the internal forces of anti slide piles.(3) According to the in-situ test monitoring data and the displacement variation of the anchor cable anti-slide pile in the numerical simulation results,It shows that the anchor cable anti slide pile plays a unique role in the landslide control project and plays an important role in maintaining the stability of the slope.
引文
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[4] 王秀丽, 金兆鑫, 董文燕, 等. 舟曲锁儿头滑坡抗滑桩监测及分析[J]. 水文地质工程地质, 2015, 42(5): 123-128.WANG Xiuli, JIN Zhaoxin, DONG Wenyan, et al. Monitoring and analysis of anti slide pile of Zhouqu head landslide[J]. Hydrogeology & Engineering Geology, 2015, 42(5): 123-128. (in Chinese)
[5] 李超. 锚—微型桩组合结构加固公路边坡技术研究[D]. 北京: 北京交通大学, 2017.LI Chao. Research on Reinforcement of Highway Slope with Anchor Micro Pile Composite Structure[D]. Beijing: Beijing Jiaotong University, 2017. (in Chinese)
[6] 陈昌富, 肖淑君. 预应力锚固抗滑桩内力计算的加权残值法[J]. 岩土力学, 2010, 31(3): 896-902.CHEN Changfu, XIAO Shujun. Weighted residual method for calculating internal force of prestressed anchorage anti slide pile[J]. Geotechnical Mechanics, 2010, 31(3): 896-902. (in Chinese)
[7] 戴自航, 沈蒲生. 抗滑桩内力计算悬臂桩法的改进[J]. 湖南大学学报: 自然科学版, 2003(3): 81-85.DAI Zihang, SHEN Pusheng. Improvement of internal force calculation of anti slide pile by cantilever pile method[J]. Journal of Hunan University: Natural Sciences, 2003(3): 81-85. (in Chinese)
[8] 宋从军, 周德培, 肖世国. 岩石高边坡埋入式抗滑桩的内力计算[J]. 岩石力学与工程学报, 2005(1): 105-109.SONG Congjun, ZHOU Depei, XIAO Shiguo. Internal force calculation of buried anti slide pile in high slope of rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2005(1): 105-109. (in Chinese)
[9] 涂国祥, 邓辉. 基于有限元强度折减法的复式抗滑桩内力计算及桩土作用机理分析[J]. 工程地质学报, 2010, 18(4): 483-489.TU Guoxiang, DENG Hui. Calculation of internal force of composite anti slide pile based on finite element strength reduction method and analysis of action mechanism of pile and soil[J]. Journal of Engineering Geology, 2010, 18(4): 483-489. (in Chinese)
[10] 胡晓军, 谭晓惠. 弹性抗滑桩全桩内力计算的地基反力荷载法[J]. 岩土力学, 2010, 31(1): 299-303.HU Xiaojun, TAN Xiaohui. Foundation inverse load method for calculating the internal force of full pile of elastic anti slide pile[J]. Geotechnical Mechanics, 2010, 31(1): 299-303. (in Chinese)
[11] 江罗成. 基于土拱效应的双排抗滑桩内力与位移计算方法及试验研究[D]. 长沙: 湖南大学, 2012.JIANG Luocheng. Calculation Method and Experimental Study on Internal Force and Displacement of Double Row Anti Slide Pile Based on Soil Arch Effect[D]. Changsha: Hunan University, 2012. (in Chinese)
[12] 周乐. 微型组合抗滑桩的内力计算及模拟研究[D]. 西安: 西安科技大学, 2013.ZHOU Le. Internal Force Calculation and Simulation Study of Micro Composite Anti Slide Pile[D]. Xi’an: Xi’an University of Science and Technology, 2013. (in Chinese)
[13] 雷国平, 唐辉明, 程昊, 等. 考虑竖向摩阻力的抗滑桩嵌固段内力计算[J]. 岩土力学, 2014, 35(8): 2197-2204. LEI Guoping, TANG Huiming, CHENG Hao, et al. Calculation of internal force of the inlay section of anti slide pile considering vertical friction[J]. Geotechnical Mechanics, 2014, 35(8): 2197-2204. (in Chinese)
[14] GB50010—2010 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010. GB50010—2010 Code for Design of Concrete Structures[S]. Beijing: China Building Industry Press,2010. (in Chinese)
[15] 张俊德, 王永翔. 攀枝花机场13#滑坡治理工程施工图设计[R]. 中铁西北科学研究院有限公司, 2016.ZHANG Junde, WANG Yongxiang. Construction drawing design of 13# landslide treatment project in Panzhihua Airport[R]. China Northwest Research Institute Co. Ltd.of CREC.2016. (in Chinese)
[16] 张俊德, 王永翔. 攀枝花机场13#滑坡治理工程勘察报告[R].中铁西北科学研究院有限公司, 2016.ZHANG Junde, WANG Yongxiang. Reconnaissance report on 13# landslide treatment project at Panzhihua Airport[R]. China Northwest Research Institute Co. Ltd.of CREC, 2016.
[2] 申永江, 孙红月, 尚岳全, 等. 抗滑桩内力的监测与计算[J]. 水文地质工程地质, 2009, 36(5): 18-22.SHEN Yongjiang, SUN Hongyue, SHANG Yuequan, et al. Monitoring and calculation of internal force of anti slide pile[J]. Hydrogeology and Engineering Geology, 2009, 36(5): 18-22. (in Chinese)
[3] 鲁鹤松. 基于监测数据的桩锚支护体系可靠性研究[D]. 长沙: 中南大学, 2014.LU Hesong. Research on Reliability of Pile Anchor Support System Based on Monitoring Data[D]. Changsha: Central South University, 2014. (in Chinese)
[4] 王秀丽, 金兆鑫, 董文燕, 等. 舟曲锁儿头滑坡抗滑桩监测及分析[J]. 水文地质工程地质, 2015, 42(5): 123-128.WANG Xiuli, JIN Zhaoxin, DONG Wenyan, et al. Monitoring and analysis of anti slide pile of Zhouqu head landslide[J]. Hydrogeology & Engineering Geology, 2015, 42(5): 123-128. (in Chinese)
[5] 李超. 锚—微型桩组合结构加固公路边坡技术研究[D]. 北京: 北京交通大学, 2017.LI Chao. Research on Reinforcement of Highway Slope with Anchor Micro Pile Composite Structure[D]. Beijing: Beijing Jiaotong University, 2017. (in Chinese)
[6] 陈昌富, 肖淑君. 预应力锚固抗滑桩内力计算的加权残值法[J]. 岩土力学, 2010, 31(3): 896-902.CHEN Changfu, XIAO Shujun. Weighted residual method for calculating internal force of prestressed anchorage anti slide pile[J]. Geotechnical Mechanics, 2010, 31(3): 896-902. (in Chinese)
[7] 戴自航, 沈蒲生. 抗滑桩内力计算悬臂桩法的改进[J]. 湖南大学学报: 自然科学版, 2003(3): 81-85.DAI Zihang, SHEN Pusheng. Improvement of internal force calculation of anti slide pile by cantilever pile method[J]. Journal of Hunan University: Natural Sciences, 2003(3): 81-85. (in Chinese)
[8] 宋从军, 周德培, 肖世国. 岩石高边坡埋入式抗滑桩的内力计算[J]. 岩石力学与工程学报, 2005(1): 105-109.SONG Congjun, ZHOU Depei, XIAO Shiguo. Internal force calculation of buried anti slide pile in high slope of rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2005(1): 105-109. (in Chinese)
[9] 涂国祥, 邓辉. 基于有限元强度折减法的复式抗滑桩内力计算及桩土作用机理分析[J]. 工程地质学报, 2010, 18(4): 483-489.TU Guoxiang, DENG Hui. Calculation of internal force of composite anti slide pile based on finite element strength reduction method and analysis of action mechanism of pile and soil[J]. Journal of Engineering Geology, 2010, 18(4): 483-489. (in Chinese)
[10] 胡晓军, 谭晓惠. 弹性抗滑桩全桩内力计算的地基反力荷载法[J]. 岩土力学, 2010, 31(1): 299-303.HU Xiaojun, TAN Xiaohui. Foundation inverse load method for calculating the internal force of full pile of elastic anti slide pile[J]. Geotechnical Mechanics, 2010, 31(1): 299-303. (in Chinese)
[11] 江罗成. 基于土拱效应的双排抗滑桩内力与位移计算方法及试验研究[D]. 长沙: 湖南大学, 2012.JIANG Luocheng. Calculation Method and Experimental Study on Internal Force and Displacement of Double Row Anti Slide Pile Based on Soil Arch Effect[D]. Changsha: Hunan University, 2012. (in Chinese)
[12] 周乐. 微型组合抗滑桩的内力计算及模拟研究[D]. 西安: 西安科技大学, 2013.ZHOU Le. Internal Force Calculation and Simulation Study of Micro Composite Anti Slide Pile[D]. Xi’an: Xi’an University of Science and Technology, 2013. (in Chinese)
[13] 雷国平, 唐辉明, 程昊, 等. 考虑竖向摩阻力的抗滑桩嵌固段内力计算[J]. 岩土力学, 2014, 35(8): 2197-2204. LEI Guoping, TANG Huiming, CHENG Hao, et al. Calculation of internal force of the inlay section of anti slide pile considering vertical friction[J]. Geotechnical Mechanics, 2014, 35(8): 2197-2204. (in Chinese)
[14] GB50010—2010 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010. GB50010—2010 Code for Design of Concrete Structures[S]. Beijing: China Building Industry Press,2010. (in Chinese)
[15] 张俊德, 王永翔. 攀枝花机场13#滑坡治理工程施工图设计[R]. 中铁西北科学研究院有限公司, 2016.ZHANG Junde, WANG Yongxiang. Construction drawing design of 13# landslide treatment project in Panzhihua Airport[R]. China Northwest Research Institute Co. Ltd.of CREC.2016. (in Chinese)
[16] 张俊德, 王永翔. 攀枝花机场13#滑坡治理工程勘察报告[R].中铁西北科学研究院有限公司, 2016.ZHANG Junde, WANG Yongxiang. Reconnaissance report on 13# landslide treatment project at Panzhihua Airport[R]. China Northwest Research Institute Co. Ltd.of CREC, 2016.