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Abstract

The construction safety problems of the business lines are increasingly catching people's attention. The pier abutment construction will inevitably cause changes in the groundwater level and stress field in the surrounding foundation, resulting in deformation of the surrounding soil and ultimately additional deformation near the business lines. In response to the above problems, based on a deep foundation pit project, this paper built a Plaxis 3D finite element model to explore the influence of construction steps of pier abutments on the displacement and deformation of the business lines' bridge abutments. Meanwhile, it simulated the actual working conditions, and compared and analyzed actual monitoring data. The results show that the pier abutment construction has little effect on the displacement of bridge abutments of the business lines. Under the most unfavorable combination, the displacement is 3-6 mm, and the finite element simulation results are basically consistent with the measured results. The excavation of the lowest soil layer in the foundation pit has the greatest influence on the displacement of the business lines.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.024

First Page

153

Last Page

158

Submission Date

March 2025

Reference

[1] 杨敏, 朱碧堂. 超载软土地基被动加固控制邻近桩基侧向变形分析[J]. 岩石力学与工程学报, 2004, 23(11): 1912-1918. YANG Min, ZHU Bitang. Effect of passive reinforcement of soil on displacement control of piles subjected to adjacent surcharge loads[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(11): 1912-1918. [2] FINNO R J, LAWRENCE S A, ALLAWH N F, et al. Analysis of performance of pile groups adjacent to deep excavation[J]. Journal of Geotechnical Engineering, 1991, 117(6): 934-955. [3] GOH A T C, TEH C I, WONG K S. Analysis of piles subjected to embankment induced lateral soil movements[J]. Journal of Geotechnical and Geoenvironmental Engineering, 1997, 123(9): 792-801. [4] POULOS H G, CHEN L T. Pile response due to excavation-induced lateral soil movement[J]. Journal of Geotechnical and Geoenvironmental Engineering, 1997, 123(2): 94-99. [5] PAN J L, GOH A T C, WONG K S, et al. Three-dimensional analysis of single pile response to lateral soil movements[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2002, 26(8): 747-758. [6] LEUNG C F, LIM J K, SHEN R F, et al. Behavior of pile groups subject to excavation-induced soil movement[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2003, 129(1): 58-65. [7] MIAO L F, GOH A T C, WONG K S, et al. Three-dimensional finite element analyses of passive pile behaviour[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2006, 30(7): 599-613. [8] ONG D E L, LEUNG C F, CHOW Y K. Behavior of pile groups subject to excavation-induced soil movement in very soft clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(10): 1462-1474. [9] LIYANAPATHIRANA D S, NISHANTHAN R. Influence of deep excavation induced ground movements on adjacent piles[J]. Tunnelling and Underground Space Technology, 2016, 52: 168-181. [10] SHAKEEL M, NG C W W. Settlement and load transfer mechanism of a pile group adjacent to a deep excavation in soft clay[J]. Computers and Geotechnics, 2018, 96: 55-72. [11] 郑刚, 颜志雄, 雷华阳, 等. 基坑开挖对临近桩基影响的实测及有限元数值模拟分析[J]. 岩土工程学报, 2007, 29(5): 638-643. ZHENG Gang, YAN Zhixiong, LEI Huayang, et al. Field observation and finite element numerical simulation analysis of effect on adjacent piles due to excavation[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(5): 638-643. [12] 王菲, 禚一. 基坑开挖对既有铁路桥基础变位的影响分析[J]. 铁道工程学报, 2012, 29(8): 28-33. WANG Fei, ZHUO Yi. Analysis of influence of foundation pit excavation on displacement of existed railway bridge foundation[J]. Journal of Railway Engineering Society, 2012, 29(8): 28-33. [13] 王木群. 基坑开挖对临近桥桩的影响及基坑稳定性分析[J]. 中外公路, 2014, 34(3): 197-200. WANG Muqun. The influence of foundation pit excavation on adjacent bridge piles and the stability analysis of foundation pit [J]. Journal of China & Foreign Highway, 2014, 34(3): 197-200. [14] 高立刚, 宁贵霞. 基坑开挖深度对既有铁路线变形的影响分析[J]. 南阳理工学院学报, 2016, 8(2): 102-105. GAO Ligang, NING Guixia. The analysis of pit excavation depth on the influence of the existing railway lines[J]. Journal of Nanyang Institute of Technology, 2016, 8(2): 102-105. [15] 高东, 汪东林. 基坑开挖对临近高架桥桩的影响[J]. 佳木斯大学学报(自然科学版), 2017, 35(3): 435-438. GAO Dong, WANG Donglin. Numerical analysis of influence with the foundation pits excavation on adjacent viaduct[J]. Journal of Jiamusi University (Natural Science Edition), 2017, 35(3): 435-438. [16] 孟繁增. 基坑开挖引起邻近高铁桥墩隆起变形实例分析[J]. 铁道标准设计, 2020, 64(4): 98-103. MENG Fanzeng. Case study on foundation-pit-excavation-induced uplift deformation of adjacent high-speed railway bridge piers[J]. Railway Standard Design, 2020, 64(4): 98-103. [17] 曾国东, 王佳, 徐奋强, 等. 桩土复合路基垫层剪切机理研究[J]. 中外公路, 2019, 39(2): 19-22. ZENG Guodong, WANG Jia, XU Fenqiang, et al. Study on shear mechanism of pile-soil composite subgrade cushion [J]. Journal of China & Foreign Highway, 2019, 39(2): 19-22. [18] 邓超. 高架桥基础承台开挖引起的路面差异沉降控制方法研究[J]. 中外公路, 2020, 40(2): 15-19. DENG Chao. Study on the control method of differential settlement of pavement caused by excavation of pile cap of viaduct foundation [J]. Journal of China & Foreign Highway, 2020, 40(2): 15-19. [19] 中交公路规划设计院有限公司. 公路桥涵设计通用规范: JTG D60—2015[S]. 北京: 人民交通出版社, 2015. General Specifications for Design of Highway Bridges and Culverts: JTG D60—2015[S]. Beijing: China Communications Press, 2015.

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