Please wait a minute...
J4  2012, Vol. 46 Issue (7): 1275-1280    DOI: 10.3785/j.issn.1008-973X.2012.07.019
土木工程     
特殊双排结构围护基坑周围地面沉降控制
张忠苗1,房凯1,刘兴旺2,林存刚1
1.浙江大学 岩土工程研究所,浙江 杭州 310058;2.浙江省建筑设计研究院,浙江 杭州 310006
Surrounding ground settlement control of special double-row
structure supported foundation pit
ZHANG Zhong-miao1, FANG Kai1, LIU Xing-wang2, LIN Cun-gang1
1. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China
 全文: PDF  HTML
摘要:

介绍一种特殊的双排桩围护结构,为了了解该围护结构周围的地面沉降,有效地控制该围护结构周围地面的变形,运用有限元法分析该结构基坑的周围地面沉降情况,通过对比说明该双层围护结构的使用起到了降低基坑周围地面沉降的作用. 对该双层结构设计参数进行分析,分析表明,基坑周围地面沉降量随两道围护结构叠加深度和内部围护结构嵌入比的增加而减小,当基坑外超载5~10 kN/m2和20~30 kN/m2时超载影响范围分别为0.5和1倍的开挖深度. 支撑刚度的增加能够有效地降低基坑周围地面沉降量. 分析得到的基坑外侧最大沉降量与内外结构间距大致呈线性关系.

Abstract:

A special double-row structure supported foundation pit was introduced. Finite element  analysis was performed to analyze the surrounding ground settlement of the foundation pit in order to provide valuable insights into the surrounding settlement and the methods to reduce the settlement. Results show that existence of inner support structure greatly reduces the settlement. The effect of different design parameters of inner support structure on the surrounding ground settlement was analyzed by parametric studies. Results show that the settlement decreases with the increasing overlapping length of the two support walls and embedment ratio of the inner wall. The influence distances for the surcharge of 5-10 kN/m2 and 20-30 kN/m2 are 0.5 and 1 times of the excavation depth, respectively. The increase of the strut stiffness can also decrease the surrounding settlement. In addition, the maximum settlement surrounding the foundation pit is approximately linear functions of the spacing between the two walls.

出版日期: 2012-07-01
:  TU 478  
作者简介: 张忠苗(1961-),男,教授,博导,从事基础工程与桩基础的研究. E-mail: zjuzzm@163.com
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章  

引用本文:

张忠苗,房凯,刘兴旺,林存刚. 特殊双排结构围护基坑周围地面沉降控制[J]. J4, 2012, 46(7): 1275-1280.

ZHANG Zhong-miao, FANG Kai, LIU Xing-wang, LIN Cun-gang. Surrounding ground settlement control of special double-row
structure supported foundation pit. J4, 2012, 46(7): 1275-1280.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2012.07.019        http://www.zjujournals.com/eng/CN/Y2012/V46/I7/1275

[1] 刘建航,侯学渊. 基坑工程手册[M]. 北京:中国建筑工业出版社,1997:6-15.
[2] 俞建霖,龚晓南. 基坑工程变形性状研究[J]. 土木工程学报, 2002, 35(4): 86-90.
YU Jianlin, GONG Xiaonan. Research on deformation of foundation pit engineering [J]. China Civil Engineering Journal, 2002, 35(4): 86-90.
[3] 杨敏,卢俊义. 上海地区深基坑周围地面沉降特点及其预测[J]. 同济大学学报, 2010,38(2): 194-199.
YANG Min, LU Junyi. Characteristics and prediction of ground settlement around deep excavation in Shanghai [J]. Journal of Tongji University, 2010, 38(2): 194-199.
[4] PECK R B. Deep excavations and tunneling in soft ground [C]∥ Proceedings of 7th International Conference on Soil Mechanics and Foundation Engineering. Mexico: [s.n.], 1969: 225-290.
[5] ABDULAZIZ I, MANA G, WAYNE C. Prediction of movement for brace cuts in clay [J]. The American Society of Civil Engineers, 1981, 107(6): 759-777.
[6] 刘兴旺,施祖元,益德清,等. 软土地区基坑开挖变形性状研究[J]. 岩土工程学报, 1999, 21(4): 456-460.
LIU Xingwang, SHI Zuyuan, YI Deqing, et al. Deformation characteristics analysis of braced excavation on soft clay [J]. Chinese Journal of Geotechnical Engineering, 1999, 21(4): 456-460.
[7] 李琳,杨敏,熊巨华. 软土地区深基坑变形特性研究[J]. 土木工程学报, 2007,40(4): 66-71.
LI Lin, YANG Min, XIONG Juhua. Analysis of the deformation characteristics of deep excavation in soft clay [J]. China Civil Engineering Journal, 2007, 40(4): 66-71.
[8] OU C Y, HSIEH P G, CHIOU D C. Characteristics of ground surface settlement during excavation [J]. Canadian Geotechnical Journal, 1993, 30(5): 758-767.
[9] WANG J H, XU Z H, WANG W D. Wall and ground movements due to deep excavation in shanghai soft soils [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 36(7): 985-994.
[10] 俞建霖,赵荣欣,龚晓南. 软土地基基坑开挖地表沉降量的数值研究[J]. 浙江大学学报, 1998,32(1): 95-101.
YU Jianlin, ZHAO Rongxin, GONG Xiaonan. Numerical study of the ground settlement caused by the excavation in soft soil [J]. Journal of Zhejiang University, 1998, 32(1): 95-101.
[11] 高文华, 沈蒲生, 杨林德. 基坑开挖中地层移动的影响因素分析[J]. 岩石力学与工程学报, 2002, 21(8): 1153-1157.
GAO Wenhua, SHEN Pusheng, YANG Linde. Influence factors on ground deformation during excavation [J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(8): 1153-1157.
[12] BOSE S K, SOM N N. Parametric study of a braced cut by finite element method [J]. Computers and Geotechnics, 1998, 22:91-107.
[13] YOO C, LEE D. Deep excavationinduced ground surface movement characteristics: a numerical investigation [J]. Computers and Geotechnics, 2008, 35(2): 231-252.
[14] XUAN F, XIA X H, WANG J H. The application of a small strain model in excavations [J]. Journal of Shanghai Jiaotong University, 2009, 14(4): 418-422.
[15] 李永盛,梁发云,李彦东,等. 土体小应变条件下紧邻地铁枢纽的超深基坑变形特性数值分析[J]. 岩石力学与工程学报, 2010,29(z1): 3184-3192.
LI Yongsheng, LIANG Fayun, LI Yandong, et al. Numerical analysis of deformation of deep excavation adjacent to metro considering smallstrain stiffness of soil [J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(z1): 3184-3192.
[16] ATKINSON J H, SALLFORS G. Experimental determination of soil properties [C]∥ Proceedings of 10th European Conference on Soil Mechanics. Florence: [s. n.], 1991: 915-956.

[1] 胡安峰, 孙波, 谢康和, 贾玉帅. 交通荷载作用下软土地基的累积沉降分析[J]. J4, 2013, 47(11): 1939-1944.
[2] 万晓丽, 李育超, 柯瀚, 陈云敏, 梅甫良, 应丰. 时域条件下填埋场导排系统水位变化规律[J]. J4, 2011, 45(4): 688-694.