Study on influence of parallel foundation pit construction on adjacent bridge and protection measures

doi:10.16265/j.cnki.issn1003-3033.2023.03.0685

Abstract

Abstract:

Taking the parallel foundation pit of pedestrian passage and bus passage attached to Qinghe railway station of high-speed railway passing through G7 high-speed Qinghe bridge as an example, the influence of parallel foundation pit excavation on adjacent bridges and the protection measures were studied. Firstly, considering the spatial effect of parallel foundation pit excavation, a finite element numerical model was established to analyze the superimposition effect of foundation pit excavation on adjacent bridge pile foundation. The calculation results show that the absolute settlement, differential settlement and inclination of the bridge piers all exceed the control values due to the superposition effect of the bridge pile disturbance caused by the excavation of the foundation pit. Combined with numerical simulation results and the similar engineering construction experience, a protective measure of using bored piles as isolation piles for adjacent bridges is proposed, and the layout of isolation piles is given according to the difference of influence of parallel foundation pit construction on different parts of adjacent bridges. The measured deformation results of adjacent bridge piers show that the isolation piles effectively constrain the superposition effect of foundation pit excavation and ensure the safe operation of G7 high-speed Qinghe bridge.

Key words: parallel foundation pit, adjacent bridge, protective measures, isolation pile, numerical simulation

ZHANG Zhongyu, LI Zhaoping, YANG Hang, LONG Qifeng, FENG Chao. Study on influence of parallel foundation pit construction on adjacent bridge and protection measures[J]. China Safety Science Journal, 2023, 33(3): 68-74.

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References 12

[1]	姜谙男, 塔拉, 李鹏. 邻近桥桩地铁车站施工数值模拟及敏感性分析[J]. 岩土工程学报, 2013, 35(增2): 1151-1154.
	JIANG Annan, TA La, LI Peng. Numerical simulation and sensitivity analysis for construction of metro station near bridge pile[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(S2): 1151-1154.
[2]	李兵, 马宁. 地铁深基坑开挖对邻近桥桩的影响分析[J]. 昆明理工大学学报:自然科学版, 2018, 43(2): 107-113.
	LI Bing, MA Ning. An analysis of the influence of subway station deep foundation pit construction on the adjacent piles[J]. Journal of Kunming University of Science and Technology:Natural Science, 2018, 43(2): 107-113.
[3]	李兆平, 汪挺, 项彦勇, 等. 北京地铁工程邻近桥桩施工风险评估及控制对策探讨[J]. 岩土力学, 2008, 29(7):1837-1842.
	LI Zhaoping, WANG Ting, XIANG Yanyong, et al. A study on risk grade classification method and disposal measures for adjacent bridge piles in Beijing Metro engineering[J]. Rock and Soil Mechanics, 2008, 29(7): 1837-1842.
[4]	凌同华, 张胜, 李升冉, 等. 邻近隧道施工既有桥桩变形控制及注浆加固方案优化[J]. 中南大学学报:自然科学版, 2014, 45(7): 2394-2400.
	LING Tonghua, ZHANG Sheng, LI Shengran, et al. Controlling of existing bridge piles deformation induced by adjacent tunneling and scheme of optimizing grouting reinforcement[J]. Journal of Central South University: Science and Technology, 2014, 45(7): 2394-2400.
[5]	吴昊, 姚顺意, 薛勋强, 等. 基于渗流应力耦合的基坑降水及开挖对邻近桥桩的影响分析[J]. 公路交通科技, 2019, 36(10): 59-66.
	WU Hao, YAO Shunyi, XUE Xunqiang, et al. Analysis on influence of foundation pit dewatering and excavation on adjacent bridge piles based on seepage stress coupling[J]. Journal of Highway and Transportation Research and Development, 2019, 36(10): 59-66.
[6]	胡军. 深基坑开挖对邻近既有高铁桩基影响研究[J]. 铁道工程学报, 2017, 34(6): 12-17.
	HU Jun. Research on the influence of excavation of deep foundation pit to adjacent existing high-speed railway bridge pile foundations stability[J]. Journal of Railway Engineering Society, 2017, 34(6): 12-17.
[7]	郭涛, 王海涛, 祁可录, 等. 流固耦合作用下基坑开挖对邻近桥桩的影响分析[J]. 施工技术:中英文, 2022, 51(2): 87-92.
	GUO Tao, WANG Haitao, QI Kelu, et al. Analysis on influence of foundation excavation on adjacent bridge piles considering fluid-solid coupling of soils[J]. Construction Technology, 2022, 51(2): 87-92.
[8]	刘欣然, 李兆平, 张存, 等. 考虑地层蠕变特性的盾构隧道施工对邻近桥桩影响和保护措施[J]. 中国安全生产科学技术, 2021, 17(10): 79-84.
	LIU Xinran, LI Zhaoping, ZHANG Cun, et al. Influence and protection measures of shield tunnel construction on adjacent bridge piles considering creep characteristics of stratum[J]. Journal of Safety Science and Technology, 2021, 17(10): 79-84.
[9]	安玉红. CSM水泥土搅拌隔离桩在地铁基坑紧邻桥桩时的保护效果研究[J]. 铁道标准设计, 2017, 61(5): 135-138.
	AN Yuhong. Study of the protective effect of partition wall (CSN) in metro foundation pit adjacent to bridge pile[J]. Railway Standard Design, 2017, 61(5): 135-138.
[10]	吕高峰, 刘德国. 复合锚杆桩加固桥梁桩基方案分析[J]. 都市快轨交通, 2013, 26(5): 79-82.
	LYU Gaofeng, LIU Deguo. Analysis on the reinforcement strategies for bridge pile foundation with composite bolt piles[J]. Urban Rapid Rail Transit, 2013, 26(5): 79-82.
[11]	赵晓勇. 地铁盾构隧道侧穿高铁桥群桩设置隔离桩影响分析[J]. 城市轨道交通研究, 2021, 24(5): 116-120.
	ZHAO Xiaoyong. Influence analysis of setting separation piles for metro shield tunnel side-crossing high-speed railway bridge pile groups[J]. Urban Mass Transit, 2021, 24(5): 116-120.
[12]	李杰. 盾构下穿高铁桥群钻孔灌注桩隔离加固技术[J]. 公路, 2018, 63(1): 262-270.
	LI Jie. Drilling piles isolation and reinforcement technology for shield driving through high-speed railway bridge group[J]. Highway, 2018, 63(1): 262-270.

土层	厚度/ m	重度/ (kN·m^-3)	黏聚力/ kPa	内摩擦角/ (°)	泊松比 υ	压缩模量/ MPa
杂填土①	3.0	16.5	0	10	0.20	3.0
粉土②	4.2	19.3	18	30.6	0.25	9.8
黏土③	3.8	18.5	13	8.1	0.35	5.0
粉质黏土③	3.0	19.4	19	10.9	0.30	6.0
细砂中砂④	4.8	20.0	0	30	0.25	35.0
粉土⑤₁	8.2	20.3	10	30.1	0.25	21.3
细砂⑤₁	53	20.0	0	30	0.20	45

结构形式	材料	重度/ (kN·m^-3)	弹性模量/GPa	泊松比υ
混凝土横撑钻孔灌注桩冠梁	C30混凝土 C30混凝土 C30混凝土	24.5 24.5 24.5	30 30 30	0.25 0.25 0.25
钢支撑	Q235B	87	206	0.25
隔离桩	C30混凝土	24.5	30	0.25
喷混凝土	C25混凝土	24	28	0.2
墩柱	C50混凝土	25	32.5	0.3
承台	C40混凝土	25	32.5	0.25
桥桩	C30混凝土	24.5	30	0.25

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