圆砾地层深大基坑开挖支护对临近既有道路的影响

doi:10.16265/j.cnki.issn1003-3033.2025.01.0025

中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (1): 94-102.doi: 10.16265/j.cnki.issn1003-3033.2025.01.0025

圆砾地层深大基坑开挖支护对临近既有道路的影响

郭延辉¹(), 马蕊¹, 毛石林², 钱勇², 丁明忠², 宋琴²

¹ 昆明理工大学公共安全与应急管理学院,云南昆明 650093
² 云南建投第六建设有限公司,云南玉溪 653199

收稿日期:2024-08-11 修回日期:2024-10-14 出版日期:2025-01-28
作者简介:
郭延辉 (1985—),男,陕西延安人,博士,副教授,主要从事岩土与地下工程方面的研究。E-mail:guoyanhui0818@kust.edu.cn。
毛石林正高级工程师
钱勇高级工程师
丁明忠工程师
宋琴高级工程师
基金资助:
云南省基础研究计划面上项目(202301AT070454); 云南省基础研究计划重点项目(202501AS070107); 云南省兴滇英才支持计划青年人才专项项目(KKXX202467043); 国家大学生创新创业训练计划项目(2021106740085); 国家大学生创新创业训练计划项目(2021106740086)

Effects of excavation support of deep and large foundation pit on gravel stratum on adjacent existing road

GUO Yanhui¹(), MA Rui¹, MAO Shilin², QIAN Yong², DING Mingzhong², SONG Qin²

¹ Faculty of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming Yunan 650093, China
² Yunnan Construction Investment No.6 Construction Co., Ltd., Yuxi Yunnan 653199, China

Received:2024-08-11 Revised:2024-10-14 Published:2025-01-28

摘要/Abstract

摘要：

为防止深大基坑开挖支护引起临近既有道路坍塌等事故灾害的发生,确保深大基坑施工过程中临近道路的安全运行,以昆明市临近城市主干道路某深大基坑工程为例,在现场深入调研的基础上,采用岩土与隧道有限元分析软件(MIDAS GTS NX)仿真计算,并结合现场监测,分析现有开挖支护方案下基坑支护结构的受力与变形特征及临近既有道路的变形特征。研究结果表明:基坑开挖支护结束后,支护桩、锚索的受力与变形均处于设计允许范围内。临近既有道路的位移随基坑开挖深度的增加而增大,在基坑开挖结束后位移趋于稳定。既有道路的变形最大值出现在距基坑边界2.5倍开挖深度的位置,且该变形量未达到基坑开挖引起的道路位移报警阈值,认为现有支护方案可保障基坑及既有道路的安全。

关键词: 圆砾地层, 深大基坑, 开挖支护, 既有道路, 变形影响, 现场监测

Abstract:

To prevent accidents and disasters, such as the collapse of existing roads nearby, caused by deep and large foundation pit excavation and support, it is necessary to ensure the safe operation of adjacent roads during the construction of deep and large foundation pits. Taking a deep and large foundation pit project near a city trunk road in Kunming as an example, on the basis of in-depth research at the site, the three-dimensional finite element numerical simulation software-new eXperience of GeoTechnical analysis system(MIDAS GTS NX) is used for simulation and calculation, and combined with on-site monitoring, to analyse the force and deformation characteristics of the foundation pit support structure and the deformation characteristics of the adjacent existing road under the existing excavation and support scheme. The study results indicated that the forces and deformations of the supporting piles and anchor cables were within design limits after the foundation pit excavation and support were complete. The displacement near the existing road increased with the increase of pit excavation depth, and become stable after the excavation was completed. The maximum deformation of the existing road occurred at a position 2.5 times the excavation depth from the foundation pit boundary. Furthermore, the deformation did not reach the alarm threshold for road displacement caused by foundation pit excavation. Thus, the existing support scheme can ensure the safety of both the foundation pit and the adjacent road.

Key words: rounded gravel stratum, deep and large foundation pit, excavation support, existing road, deformation impact, site monitoring

中图分类号:

X948

郭延辉, 马蕊, 毛石林, 钱勇, 丁明忠, 宋琴. 圆砾地层深大基坑开挖支护对临近既有道路的影响[J]. 中国安全科学学报, 2025, 35(1): 94-102.

GUO Yanhui, MA Rui, MAO Shilin, QIAN Yong, DING Mingzhong, SONG Qin. Effects of excavation support of deep and large foundation pit on gravel stratum on adjacent existing road[J]. China Safety Science Journal, 2025, 35(1): 94-102.

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参考文献 15

[1]	陈江, 阳军生, 张学民, 等. 共用连续墙结构的现场测试与安全性评价[J]. 中国安全科学学报, 2016, 26(7): 108-112.
	CHEN Jiang, YANG Junsheng, ZHANG Xuemin, et al. Field measurement and safety evaluation of shared diaphragm wall structure[J]. China Safety Science Journal, 2016, 26(7): 108-112.
[2]	韩健勇, 赵文, 李天亮, 等. 深基坑与邻近建筑物相互影响的实测及数值分析[J]. 工程科学与技术, 2020, 52(4): 149-156.
	HAN Jianyong, ZHAO Wen, LI Tianliang, et al. Field measurement and numerical analysis of the influence between the deep excavation and adjacent buildings[J]. Advanced Engineering Sciences, 2020, 52(4):149-156.
[3]	张仲宇, 李兆平, 杨航, 等. 并行基坑施工对邻近桥梁影响及保护措施[J]. 中国安全科学学报, 2023, 33(3): 68-74. doi: 10.16265/j.cnki.issn1003-3033.2023.03.0685
	ZHANG Zhongyu, LI Zhaoping, YANG Hang, et al. Study on influence of parallel foundation pit construction on adjacent bridge and protection measures[J]. China Safety Science Journal, 2023, 33(3): 68-74. doi: 10.16265/j.cnki.issn1003-3033.2023.03.0685
[4]	汪东林, 汪磊. 紧邻既有高速公路偏压地铁深基坑围护结构变形监测与数值模拟研究[J]. 建筑结构, 2015, 45(11): 91-95.
	WANG Donglin, WANG Lei. Study on field monitoring and numerical simulation of deformation of deep foundation pit retaining structure under unsymmetrical load condition adjacent to existing highway[J]. Building Structure, 2015, 45(11): 91-95.
[5]	焦宁, 丁建文, 吉锋, 等. 土岩复合地层中深基坑开挖对邻近管线变形影响分析[J]. 东南大学学报: 自然科学版, 2022, 52(2): 229-236.
	JIAO Ning, DING Jianwen, JI Feng, et al. Analysis on influence of deep foundation pit excavation in soil-rock composite stratum on deformation of adjacent pipelines[J]. Journal of Southeast University: Natural Science Edition, 2022, 52(2): 229-236.
[6]	郭延辉, 严明, 宋琴, 等. 深基坑开挖对临近既有高压天然气管道的影响[J]. 地下空间与工程学报, 2021, 17(增2): 840-847.
	GUO Yanhui, YAN Ming, SONG Qin, et al. The influence of deep foundation pit excavation on the adjacent existing high pressure natural gas pipeline[J]. Chinese Journal of Underground Space and Engineering, 2021, 17(S2): 840-847.
[7]	叶帅华, 李德鹏. 复杂环境下深大基坑开挖监测与数值模拟分析[J]. 土木工程学报, 2019, 52(增2): 117-126.
	YE Shuaihua, LI Depeng. Monitoring and simulation analysis of deep and large foundation pit excavation in complex environment[J]. China Civil Engineering Journal, 2019, 52(S2): 117-126.
[8]	雷华阳, 冯双喜, 万勇峰, 等. 基坑开挖对既有临近滩涂铁路路基影响规律及安全措施研究[J]. 天津大学学报: 自然科学与工程技术版, 2019, 52(9): 969-978.
	LEI Huayang, FENG Shuangxi, WAN Yongfeng, et al. Influence law and safety measures of foundation pit excavation on existing railway subgrade in tidal flat areas[J]. Journal of Tianjin University: Science and Technology, 2019, 52(9): 969-978.
[9]	王培鑫, 周顺华, 狄宏规, 等. 基坑开挖对邻近铁路路基变形影响与控制[J]. 岩土力学, 2016, 37(增1): 469-476.
	WANG Peixin, ZHOU Shunhua, DI Honggui, et al. Impacts of foundation pit excavation on adjacent railway subgrade and control[J]. Rock and Soil Mechanics, 2016, 37(S1): 469-476.
[10]	ZHAO Jinpeng, TAN Zhongsheng, YU Rongsen, et al. Deformation responses of the foundation pit construction of the urban metro station: a case study in Xiamen[J]. Tunnelling and Underground Space Technology, 2022, 128: DOI: 10.1016/j.tust.2022.104662.
[11]	FENG Zheyuan, XU Qi, XU Xiangyang, et al. Deformation characteristics of soil layers and diaphragm walls during deep foundation pit excavation: simulation verification and parameter analysis[J]. Symmetry, 2022, 14(2): DOI: 10.3390/sym14020254.
[12]	谭鑫, 金永乐, 黄明华, 等. 桩锚支护基坑对近邻建筑影响实测及三维数值分析[J]. 土木工程学报, 2023, 56(7): 126-136.
	TAN Xin, JIN Yongle, HUANG Minghua, et al. Numerical analysis and filed monitoring on deformation characteristics of deep excavation adjacent to building with shallow foundation[J]. China Civil Engineering Journal, 2023, 56(7): 126-136.
[13]	韩健勇, 赵文, 关永平, 等. 近接浅基础建筑物深基坑变形特性及关键参数[J]. 东北大学学报: 自然科学版, 2018, 39(10): 1463-1468.
	HAN Jianyong, ZHAO Wen, GUAN Yongping, et al. Deformation characteristics and key parameters of deep excavation adjacent to buildings with shallow foundations[J]. Journal of Northeastern University: Natural Science, 2018, 39(10): 1463-1468.
[14]	王思懿. 陆海域复杂基坑施工对邻近桩基影响的数值模拟研究[D]. 大连: 大连理工大学, 2021.
	WANG Siyi. Study on the influence of complex excavation on piles in land and seabed using numerical simulation[D]. Dalian: Dalian University of Technology, 2021.
[15]	GB 50497—2019, 建筑基坑工程监测技术标准[S].
	GB 50497-2019, Technical standard for monitoring of building excavation engineering[S].

地层	弹性模量/ MPa	泊松比	容重/ (kN·m^-3)	黏聚力/ kPa	内摩擦角/ (°)	三轴割线刚度/ (kN·m^-2)
杂填土	7.0	0.28	18.7	19.5	8.5	3 850
泥炭土	12.1	0.40	13.2	20.0	6.0	6 655
圆砾土	196.7	0.46	19.4	9.4	41.0	108 185
粉质黏土	16.0	0.30	19.0	40.0	12.0	8 800

结构形式	弹性模量/MPa	泊松比	容重/(kN·m^-3)
锚索	195 000	0.30	78.5
支护桩	31 500	0.20	25.0
压密注浆	25 000	0.30	23.0
高压旋喷加固、挡土墙	31 500	0.20	25.0

现场监测项目	布设方法	数量	监测点编号
道路竖向位移	间距为6m,布设10排测点,每排共布设8个	80	F1-1—F1-8、F2-1—F2-8、F3-1—F3-8、F4-1—F4-8、F5-1—F5-8、F6-1—F6-8、F7-1—F7-8、F8-1—F8-8、F9-1—F9-8、F10-1—F10-8
桩顶水平位移	每隔15~20 m布设一个	5	WY63、WY64、WY65、WY66、WY67
桩顶竖向位移	每隔15~20 m布设一个	5	W63、W64、W65、 W66、W67
锚索内力	布设在具有代表性部位,数量为总数的1%~3%,每层竖向保持一致	6	M1-032—M6-032

圆砾地层深大基坑开挖支护对临近既有道路的影响

Effects of excavation support of deep and large foundation pit on gravel stratum on adjacent existing road

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