A study of the deformation of anti-slide pile and pile-plate structure in large landslide
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摘要:
在复杂艰险山区修建无砟轨道路基时，现有常规抗滑桩或桩板结构等均难以同时解决大型滑坡区潜在滑移和沉降控制问题。为适应无砟轨道路基通过大型滑坡区的需要，创新设计了抗滑桩-桩板结构，并结合贵阳至广州高速铁路建设，开展了大型滑坡抗滑桩-桩板结构现场监测试验。结果表明：抗滑桩和桩板结构基桩的最大侧向位移均位于桩顶，沿深度方向侧向位移先缓慢衰减再加速衰减；滑面附近侧向约束作用的差异，往往会导致桩身侧向位移发生突变；抗滑桩和基桩的桩身弯矩均呈先增大至峰值点再减小的趋势，沿桩深方向具有单峰曲线变化特征；雨季降水作用导致桩身弯矩增加，旱季蒸发作用导致桩身弯矩减小；结构系统中抗滑桩充分发挥了承担滑坡推力控制滑体稳定的作用，基桩则主要用于承担竖向荷载控制路基沉降，承担的滑坡推力较小。抗滑桩-桩板结构可作为滑坡区无砟轨道路基通过的加固型式，对今后类似复杂艰险山区高速铁路修建具有重要的参考价值。
Abstract:When the ballastless track subgrade is constructed in complex and dangerous mountainous areas, it is difficult to solve the potential slip constraint of landslides and settlement control of subgrade by using the existing conventional anti-slide piles or pile-plate structures. To meet the needs of the ballastless track subgrade passing through large landslides, an innovative anti-slide pile and pile-plate structure is designed, and combined with the construction of the Guiguang high-speed railway, the field monitoring tests of the combination structure in large landslides are carried out. The results show that the maximum lateral displacement of both the anti-slide pile and pile-plate structure is located at the top of piles, meanwhile, the lateral displacement decreases with depth. The difference in lateral constraint of the slip surface will cause sudden changes in the lateral displacement of the pile body. The bending moments of anti-slide piles and foundation piles first increase to the peak point and then decrease with the depth, which can be described as a unimodal curve along the pile depth. The bending moments of piles increase in the rainy season, but decrease in the dry season. The anti-slide pile of the combination structure system can be used to control the stability of landslides, and the pile-plate structure is mostly used to control the settlement of the ballastless track subgrade. Therefore, the combination structure can be used as a reinforcement type of ballastless track subgrade in landslides.
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Key words:
- ballastless track /
- large landslide /
- anti-slide pile /
- pile-plate structure /
- deformation
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[1] 国家铁路局. 高速铁路设计规范: TB 10621—2014[S]. 北京: 中国铁道出版社, 2015.
State Railway Administration. Code for design of high speed railway: TB 10621—2014[S]. Beijing: China Railway Publishing House, 2015 (in Chinese)
[2] 陈伟志, 李安洪, 蒋关鲁, 等. 铁路路基下膨胀土长短微型桩抗隆起研究[J]. 岩石力学与工程学报,2019,38(2):413 − 423. [CHEN Weizhi, LI Anhong, JIANG Guanlu, et al. Study on resisting upheaval of long-short micropiles of expansive soils under railway subgrade[J]. Chinese Journal of Rock Mechanics and Engineering,2019,38(2):413 − 423. (in Chinese with English abstract)
[3] 陈伟志, 蒋关鲁, 赵慧爽, 等. 铁路路基下膨胀土地基浸水响应现场试验[J]. 岩土工程学报,2014,36(8):1507 − 1514. [CHEN Weizhi, JIANG Guanlu, ZHAO Huishuang, et al. Field tests on soaking response of expansive soil foundation under railway subgrade[J]. Chinese Journal of Geotechnical Engineering,2014,36(8):1507 − 1514. (in Chinese with English abstract) doi: 10.11779/CJGE201408017
[4] 陈伟志, 李安洪, 李楚根, 等. 无砟轨道粗颗粒盐渍土路基设计方法[J]. 水文地质工程地质,2017,44(6):58 − 63. [CHEN Weizhi, LI Anhong, LI Chugen, et al. Design methods of coarse grained saline soil subgrade in ballastless track[J]. Hydrogeology & Engineering Geology,2017,44(6):58 − 63. (in Chinese with English abstract)
[5] 崔国东. 高速铁路路基变形控制的研究[D]. 北京: 中国铁道科学研究院, 2016.
CUI Guodong. Research on deformation control about subgrade of high speed railway[D]. Beijing: China Academy of Railway Sciences, 2016. (in Chinese with English abstract)
[6] 付铭川, 陈伟志, 黄百川, 等. 基于袖阀管注浆法的铁路路基过渡段沉降超限整治[J]. 路基工程,2019(5):213 − 218. [FU Mingchuan, CHEN Weizhi, HUANG Baichuan, et al. Over-limit settlement treatment of railway subgrade transition section based on sleeve-valve-pipe grouting method[J]. Subgrade Engineering,2019(5):213 − 218. (in Chinese with English abstract)
[7] 李彬, 骆飞. 浅谈现代有轨电车路基沉降控制方法[J]. 广州建筑,2019,47(3):32 − 35. [LI Bin, LUO Fei. Brief analysis on the control method of modern tramway subgrade settlement[J]. Guangzhou Architecture,2019,47(3):32 − 35. (in Chinese with English abstract) doi: 10.3969/j.issn.1671-2439.2019.03.008
[8] 韩竹青. 某高速铁路动车段地基处理沉降研究分析[J]. 铁道勘察,2019,45(1):81 − 85. [HAN Zhuqing. Comparison of foundation treatments of a certain high speed railway EMU depot based on settlement analysis[J]. Railway Investigation and Surveying,2019,45(1):81 − 85. (in Chinese with English abstract)
[9] 时兴隆.黄土地区某高速铁路路基沉降控制技术研究[D]. 兰州: 兰州交通大学, 2018.
SHI Xinglong. Research on the settlement control technology of a high speed railway subgrade in loess area[D]. Lanzhou : Lanzhou Jiaotong University, 2018. (in Chinese with English abstract)
[10] 许兴旺. 湿陷性黄土地区高速铁路路基地基沉降控制技术[J]. 铁道建筑,2017,57(4):83 − 86. [XU Xingwang. Technology to control subsidence of high speed railway subgrade foundation in collapsible loess region[J]. Railway Engineering,2017,57(4):83 − 86. (in Chinese with English abstract) doi: 10.3969/j.issn.1003-1995.2017.04.22
[11] 陈胜. 高速铁路桩网复合地基正常使用极限状态可靠度研究[D]. 武汉: 中国地质大学(武汉), 2018.
CHEN Sheng. Research on reliability of pile-net composite foundation for serviceability limit state in high-speed railway[D]. Wuhan: China University of Geosciences, 2018. (in Chinese with English abstract)
[12] 詹永祥. 高速铁路无碴轨道桩板结构路基设计理论及试验研究[D]. 成都: 西南交通大学, 2007.
ZHAN Yongxiang. Study on design method of pile-plank embankment of ballastless track in high-speed railway by tests[D]. Chengdu: Southwest Jiaotong University, 2007. (in Chinese with English abstract)
[13] 荆志东. 深厚软基新型桩板结构路基结构设计研究[D]. 成都: 西南交通大学, 2010.
JING Zhidong. Research on new embankment construction of pile-plate in deep soft-clay region[D]. Chengdu: Southwest Jiaotong University, 2010. (in Chinese with English abstract)
[14] 詹永祥, 蒋关鲁, 牛国辉, 等. 武广线高边坡陡坡地段桩板结构路基的设计理论探讨[J]. 铁道工程学报,2007(增刊1):94 − 96. [ZHAN Yongxiang, JIANG Guanlu, NIU Guohui, et al. Theoretical exploration on design of pile-plate structure subgrade in steep slope section of high side slope on Wuchang-Guangzhou Railway passenger dedicated line[J]. Journal of Railway Engineering Society,2007(Sup1):94 − 96. (in Chinese with English abstract)
[15] 苏谦, 李安洪, 丁兆锋, 等. 郑西客运专线深厚湿陷性黄土地基桩板结构设计分析[J]. 铁道建筑技术,2007(2):1 − 4. [SU Qian, LI Anhong, DING Zhaofeng, et al. Design and analysis on pile-board structure of deep collapsible loess ground along Zhengzhou-Xi'an passenger dedicated railway line[J]. Railway Construction Technology,2007(2):1 − 4. (in Chinese with English abstract) doi: 10.3969/j.issn.1009-4539.2007.02.001
[16] 李安洪, 周德培, 冯君. 顺层岩质路堑边坡破坏模式及设计对策[J]. 岩石力学与工程学报,2009,28(增刊1):2915 − 2921. [LI Aonghong, ZHOU Depei, FENG Jun. Failure modes of bedding rock cutting slope and design countermeasures[J]. Chinese Journal of Rock Mechanics and Engineering,2009,28(Sup1):2915 − 2921. (in Chinese with English abstract)
[17] 尹伟, 杨明, 姚裕春, 等. 平寨滑坡区桩板结构路基稳定性分析及优化设计[J]. 铁道建筑,2013,43(3):101 − 103. [YIN Wei, YANG Ming, YAO Yuchun, et al. Stability analysis and optimization design of pile-slab structure subgrade in Pingzhai landslide area[J]. Railway Engineering,2013,43(3):101 − 103. (in Chinese)
[18] 中华人民共和国铁道部. 铁路工程不良地质勘察规程: TB 10027—2012[S]. 北京: 中国铁道出版社, 2012.
Ministry of Railways of the People's Republic of China. Code for unfavorable geological condition investigation of railway engineering: TB 10027—2012[S]. Beijing: China Railway Publishing House, 2012. (in Chinese)
[19] 张玲, 朱幸仁, 欧强. 考虑桩桩相互作用的双排支护桩受力变形分析[J]. 水文地质工程地质,2019,46(5):72 − 80. [ZHANG Ling, ZHU Xingren, OU Qiang. Analysis of forced deformation of double row supportpiles considering pile interaction[J]. Hydrogeology & Engineering Geology,2019,46(5):72 − 80. (in Chinese with English abstract)
[20] 王鳌杰. 预应力锚索抗滑桩支挡结构在路基边坡防护中的应用研究[J]. 公路工程,2018,43(1):145 − 148. [WANG Aojie. Application of stabilizing piles with pre-stressed anchor cables retaining structure in subgrade slope protection[J]. Highway Engineering,2018,43(1):145 − 148. (in Chinese with English abstract)
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