|本期目录/Table of Contents|

[1]黄莺,方中义,李学聪,等.上软下硬地层深基坑结构变形监测及分析*[J].中国安全生产科学技术,2022,18(9):203-209.[doi:10.11731/j.issn.1673-193x.2022.09.029]
　HUANG Ying,FANG Zhongyi,LI Xuecong,et al.Deformation monitoring and analysis of deep foundation pit structure in upper-soft and lower-hard stratum[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(9):203-209.[doi:10.11731/j.issn.1673-193x.2022.09.029]
点击复制

上软下硬地层深基坑结构变形监测及分析*
分享到：

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年9期
页码:
203-209
栏目:
职业安全卫生管理与技术
出版日期:
2022-09-30

文章信息/Info

Title:
Deformation monitoring and analysis of deep foundation pit structure in upper-soft and lower-hard stratum
文章编号:
1673-193X(2022)-09-0203-07
作者:
黄莺; 方中义; 李学聪; 周清才; 梅源
（1.西安建筑科技大学 土木工程学院，陕西 西安 710055；
2.广州地铁集团有限公司，广东 广州 510308；
3.中铁七局集团西安铁路工程有限公司，陕西 西安 710032）
Author(s):
HUANG Ying;  FANG Zhongyi;  LI Xuecong;  ZHOU Qingcai;  MEI Yuan
(1.College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an Shaanxi 710055,China;
2.Guangzhou Metro Group Co.,Ltd.,Guangzhou Guangdong 510308,China;
3.Xi’an Railway Engineering Co.,Ltd.of China Railway Seventh Group,Xi’an Shaanxi 710032,China)
关键词:
上软下硬地层; 深基坑; 围护结构; 现场监测; 数值模拟
Keywords:
upper-soft and lower-hard stratum;  deep foundation pit;  retaining structure;  field monitoring;  numerical simulation
分类号:
X947;TU476
DOI:
10.11731/j.issn.1673-193x.2022.09.029
文献标志码:
A
摘要:
为探究在上软下硬地层中进行深基坑开挖时围护结构水平位移与内支撑轴力的变化规律，以广州地区某上软下硬地层盾构井深基坑开挖项目为依托，基于现场监测数据进行分析并运用MIDAS/GTS软件开展深基坑开挖全过程的有限元模拟。将围护结构水平位移模拟值与监测值进行对比，验证模型的准确性；改变围护结构嵌固深度、主体结构厚度等工况，研究上述因素对结构水平位移变化产生的影响。研究结果表明：实测围护结构最大水平位移值11.78 mm，位于长边0.7倍基坑深度附近，坑角处位移值最小；改变结构嵌固深度对坑深15 m以下围护结构位移值影响较大，本工程最佳嵌固深度为1.5~3 m；围护结构水平位移会随着结构主体厚度的增加而减小，但最大位移间差值逐渐减小，结构主体厚度设计值宜为0.8~1 m。
Abstract:
In order to explore the variation law of horizontal displacement of retaining structure and axial force of internal support during the deep foundation pit excavation in upper-soft and lower-hard stratum,based on a certain deep foundation pit excavation project of shield well in upper-soft and lower-hard stratum in Guangzhou area,the finite element simulation on the whole process of deep foundation pit excavation was carried out by using the MIDAS/GTS software based on the analysis of field monitoring data.The accuracy of the model was verified by comparing the simulation values and monitoring values of the horizontal displacement of retaining structure,and the influence of the above factors on the structural horizontal displacement was studied by changing the embedded depth of retaining structure,the thickness of main structure and other conditions.The results showed that the measured maximum horizontal displacement of the retaining structure was 11.78 mm,which was located at long edge near 0.7 times of the foundation pit depth,and the displacement value at the corner of the pit was the smallest.Changing the embedded depth of the structure had greater impact on the displacement values of the retaining structure below 15 m of pit depth,and the optimal embedded depth of the project was 1.5~3 m.The horizontal displacement of the retaining structure would decrease with the increase of the main structure thickness,but the difference between maximum displacements would decrease gradually,and the design value of the main structure thickness should be 0.8~1 m.

参考文献/References:

［1］郑刚,朱合华,刘新荣,等.基坑工程与地下工程安全及环境影响控制［J］.土木工程学报,2016,49(6):1-24. ZHENG Gang,ZHU Hehua,LIU Xinrong,et al.Control of safety of deep excavations and underground engineering and its impact on surrounding environment［J］.China Civil Engineering Journal,2016,49(6):1-24.
［2］刘念武,龚晓南,楼春晖.软土地区基坑开挖对周边设施的变形特性影响［J］.浙江大学学报(工学版),2014,48(7):1141-1147. LIU Nianwu,GONG Xiaonan,LOU Chunhui.Deformation behavior of nearby facilities analysis induced by excavation in soft clay［J］.Journal of Zhejiang University (Engineering Science),2014,48(7):1141-1147.
［3］TAN Y,WEI B,DIAO Y P,et al.Spatial corner effects of long and narrow multipropped deep excavations in Shanghai soft clay［J］.Journal of Performance of Constructed Facilities,2014,28(4)：04014015.
［4］CUI X Y,YE M G,ZHUANG Y.Performance of a foundation pit supported by bored piles and steel struts:a case study［J］.Soils and Foundations,2018,58(4):1016-1027.
［5］李涛,王昕鹏,陈慧娴,等.钢支撑对盾构竖井深基坑围护桩体变形规律的影响［J］.河南科技大学学报(自然科学版),2015,36(2):74-77,82,7. LI Tao,WANG Xinpeng,CHEN Huixian,et al.Influence of steel supporting on deformation of deep pit pile structures in shield well［J］.Journal of Henan University of Science and Technology:Natural Science,2015,36(2):74-77,82,7.
［6］吴波,彭逸勇,蒙国往,等.宁波软土地区相连深基坑开挖施工时空效应实测分析［J］.铁道科学与工程学报,2020,17(1):82-94. WU Bo,PENG Yiyong,MENG Guowang,et al.Analysis on time-space effect of excavation construction of adjacent deep foundation pit in Ningbo soft soil area［J］.Journal of Railway Science and Engineering,2020,17(1):82-94.
［7］郭海庆,陶善之,张泉.基于离心机模型试验的超深基坑受力变形研究［J］.地下空间与工程学报,2020,16(1):177-186. GUO Haiqing,TAO Shanzhi,ZHANG Quan.Research on stress and deformation of super deep foundation pitsbased on the Centrifugal Model test［J］.Chinese Journal of Underground Space and Engineering,2020,16(1):177-186.
［8］陈保国,闫腾飞,王程鹏,等.深基坑地连墙支护体系协调变形规律试验研究［J］.岩土力学,2020,41(10):3289-3299. CHEN Baoguo,YAN Tengfei,WANG Chengpeng,et al.Experimental study on compatible deformation of diaphragm wall support system for deep foundation pit［J］.Rock and Soil Mechanics,2020,41(10):3289-3299.
［9］孙廉威,张阿晋,吴小建.窄长类匝道基坑开挖变形监测数据统计分析［J］.中国安全生产科学技术,2021,17(5):93-98. SUN Lianwei,ZHANG Ajin,WU Xiaojian.Statistical analysis on deformation monitoring data in excavation of narrow and long ramp foundation pit［J］.Journal of Safety Science and Technology,2021,17(5):93-98.
［10］贾坚,谢小林,翟杰群,等.软土基坑变形控制的微扰动技术［J］.上海交通大学学报,2016,50(10):1651-1657. JIA Jian,XIE Xiaolin,ZHAI Jiequn,et al.Micro disturbance technology for controlling deformation of soft soil excavation［J］.Journal of Shanghai Jiao Tong University,2016,50(10):1651-1657.
［11］刘念武,陈奕天,龚晓南,等.软土深开挖致地铁车站基坑及邻近建筑变形特性研究［J］.岩土力学,2019,40(4):1515-1525,1576. LIU Nianwu,CHEN Yitian,GONG Xiaonan,et al.Analysis of deformation characteristics of foundation pit of metro station and adjacent buildings induced by deep excavation in soft soil［J］.Rock and Soil Mechanics 2019,40(4):1515-1525,1576.
［12］苗兰弟,任庆国.考虑随机误差的软土基坑沉降趋势分析及预测［J］.中国安全生产科学技术,2021,17(6):111-116. MIAO Landi,REN Qingguo.Analysis and prediction on settlement trend of soft soil foundation pit considering random error［J］.Journal of Safety Science and Technology,2021,17(6):111-116.
［13］高亿文,李明广,陈锦剑.超载影响下围护结构非对称基坑的受力及变形特性分析［J］.上海交通大学学报,2020,54(6):643-651. GAO Yiwen,LI Mingguang,CHEN Jinjian.Stress and deformation performance of deep excavation with asymmetrical retaining structures in adjacent surcharge［J］.Journal of Shanghai Jiao Tong University,2020,54(6):643-651.
［14］冯晓腊,熊宗海,莫云,等.复杂条件下基坑开挖对周边环境变形影响的数值模拟分析［J］.岩土工程学报,2014,36(S2):330-336. FENG Xiaola,XIONG Zonghai,MO Yun,et al.Numerical simulation and analysis of surrounding environment deformation influenced by excavation of foundation pits under complex conditions［J］.Chinese Journal of Geotechnical Engineering,2014,36(S2):330-336.
［15］刘钊,李子春,刘国楠,等.花岗岩残积土的修正摩尔库伦模型参数取值研究［J］.铁道建筑,2017(3):89-92. LIU Zhao,LI Zichun,LIU Guonan,et al.Study on parameters determination of modified mohr-coulomb model for granite residual soil in deep foundation pit simulation analysis［J］.Railway Engineering,2017(3):89-92.

相似文献/References:

[1]李涛,钱霄,宋常军,等.砂卵石地层桩锚支护结构稳定性实例研究[J].中国安全生产科学技术,2011,7(1):19.
　LI Tao,QIAN Xiao,SONG Chang-jun,et al.Case study on the stability of pile-anchor supporting structure in sandy ground[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2011,7(9):19.
[2]高丙丽,张琨,任建喜,等.西安地铁车站深基坑变形规律FLAC模拟研究[J].中国安全生产科学技术,2012,8(3):179.
　GAO Bing li,ZHANG Kun,REN Jian xi,et al.Research on the deformation law of deep excavation supporting structure in metro station of Xi’an by FLAC simulation[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(9):179.
[3]王垚,冯超.地铁车站深基坑围护桩优化及其数值分析[J].中国安全生产科学技术,2013,9(2):54.
　WAGN Yao,FENG Chao.Numerical analysis and optimization on supporting piles in deep foundation fit of metro station[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2013,9(9):54.
[4]常江,张君.北京地铁义和庄站基坑支护结构及变形监测[J].中国安全生产科学技术,2009,5(3):149.
　CHANG Jiang,ZHANG Jun.Support structure and deformation monitoring of excavation pit in Yihezhuang station of Beijing subway[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2009,5(9):149.
[5]黄仁东,华正阳.基于理想点法的邻近基坑高层建筑安全性评价[J].中国安全生产科学技术,2014,10(8):162.[doi:10.11731/j.issn.1673-193x.2014.08.029]
　HUANG Ren-dong,HUA Zheng-yang.Safety assessment on high-rise adjacent to foundation pit based on ideal point method[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(9):162.[doi:10.11731/j.issn.1673-193x.2014.08.029]
[6]毛正君,狄建强,樊文柱,等.共同管沟深基坑现场变形监测与数值模拟分析[J].中国安全生产科学技术,2016,12(9):103.[doi:10.11731/j.issn.1673-193x.2016.09.019]
　MAO Zhengjun,DI Jianqiang,FAN Wenzhu,et al.Field monitoring and numerical simulation analysis on deformation of deep foundation pit for utility tunnel[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(9):103.[doi:10.11731/j.issn.1673-193x.2016.09.019]
[7]祝磊,彭建和,刘金龙.地铁车站深基坑建设对邻近建筑物安全的影响评估[J].中国安全生产科学技术,2015,11(12):85.[doi:10.11731/j.issn.1673-193x.2015.12.013]
　ZHU Lei,PENG Jian-he,LIU Jin-long.Evaluation on influence by construction of deep foundation pit in subway station to safety of adjacent buildings[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(9):85.[doi:10.11731/j.issn.1673-193x.2015.12.013]
[8]蒙国往,农忠建,吴波,等.地铁车站深基坑开挖变形及数值模拟分析*[J].中国安全生产科学技术,2020,16(7):145.[doi:10.11731/j.issn.1673-193x.2020.07.023]
　MENG Guowang,NONG Zhongjian,WU Bo,et al.Excavation deformation and numerical simulation analysis of deep foundation pit in subway station[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(9):145.[doi:10.11731/j.issn.1673-193x.2020.07.023]
[9]王永祥,廖婷,李洪高,等.基于SEM-MC的地铁车站深基坑施工危险性测度研究*[J].中国安全生产科学技术,2022,18(6):127.[doi:10.11731/j.issn.1673-193x.2022.06.019]
　WANG Yongxiang,LIAO Ting,LI Honggao,et al.Research on risk measurement of deep foundation pit construction in metro station based on SEM-MC[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(9):127.[doi:10.11731/j.issn.1673-193x.2022.06.019]
[10]吴波,杜君,温小栋,等.基于改进熵权-DEMATEL-ISM的富水软土层深基坑施工安全风险评估*[J].中国安全生产科学技术,2023,19(10):106.[doi:10.11731/j.issn.1673-193x.2023.10.015]
　WU Bo,DU Jun,WEN Xiaodong,et al.Safety risk assessment of deep foundation pit construction in water-rich soft soil layer based on entropy weight-DEMATEL-ISM[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(9):106.[doi:10.11731/j.issn.1673-193x.2023.10.015]

备注/Memo

备注/Memo:
收稿日期： 2022-02-24
* 基金项目： 陕西省重点研发计划项目（2020SF-373）
作者简介： 黄莺，博士，副教授，主要研究方向为土木工程施工技术、安全、预警。
通信作者： 方中义，硕士研究生，主要研究方向为土木工程建造与管理。
更新日期/Last Update: 2022-10-14