上海交通大学学报 ›› 2018, Vol. 52 ›› Issue (2): 133-140.doi: 10.16183/j.cnki.jsjtu.2018.02.002
所属专题: 王建华教授学报发文专辑
收稿日期:
2016-08-22
出版日期:
2018-03-01
发布日期:
2021-06-04
作者简介:
范凡(1991-),男,河北省井陉县人,硕士,主要从事岩土工程研究方面的工作.E-mail:基金资助:
FAN Fan(), ZHANG Hongbing, WANG Jianhua, CHEN Jinjian, ZHANG Yipeng
Received:
2016-08-22
Online:
2018-03-01
Published:
2021-06-04
摘要:
以上海国际航空中心基坑群工程为例,通过现场实测数据统计分析结合数值分析方法,分析了分隔型基坑群变形特性.深入研究了分隔型基坑群施工过程中隔墙变形、围护结构侧向变形和坑后土体沉降的发展规律,分析对比了不同区域围护结构变形和坑外地表沉降的差异.对比基坑群工程和传统基坑工程.结果表明,基坑群施工中隔墙变形先增大后减小,受后续开挖影响显著;基坑群分隔带处围护结构最大变形平均为0.16%H(H为基坑开挖深度),远小于上海地区平均值0.60%H;分隔带处坑外地表沉降仅有0.14%H,小于上海地区平均值0.40%H.研究可以揭示基坑群变形叠加机制,评估基坑群施工对环境的影响,对后续基坑群施工和敏感建构筑物保护有一定的借鉴意义.
中图分类号:
范凡, 章红兵, 王建华, 陈锦剑, 张毅鹏. 软土地区分隔型基坑群变形特性实测分析[J]. 上海交通大学学报, 2018, 52(2): 133-140.
FAN Fan, ZHANG Hongbing, WANG Jianhua, CHEN Jinjian, ZHANG Yipeng. Deformation Characteristics of Divided Excavation Groups in Soft Soil[J]. Journal of Shanghai Jiao Tong University, 2018, 52(2): 133-140.
表1
土层物理力学参数
层号 | 土层名称 | 层厚/m | w/% | γ/(kN·m-3) | e | Cc | ps/MPa | E/MPa | ν | C/kPa | φ/(°) | ψ/(°) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
① | 填土 | 1.5~6.5 | - | - | - | - | - | 30.0 | 0.30 | - | - | - |
② | 粉质粘土 | 0.5~2.0 | 27.4 | 18.0 | 0.94 | 0.168 | 0.78 | 30.0 | 0.30 | 12 | 31.5 | 2 |
③ | 淤泥质粉质粘土 | 2.5~6.9 | 34.7 | 17.2 | 1.18 | 0.241 | 0.84 | 22.5 | 0.35 | 12 | 29.8 | 2 |
④ | 淤泥质粘土 | 8.4~10.0 | 48.6 | 17.0 | 1.43 | 0.383 | 0.55 | 18.0 | 0.35 | 9 | 18.9 | 2 |
⑤ | 粉质粘土 | 5.0~8.1 | 34.2 | 18.2 | 1.03 | 0.244 | 1.01 | 45.0 | 0.35 | 12 | 28.3 | 2 |
⑥ | 粉质粘土 | 2.4~4.8 | 22.5 | 19.9 | 0.71 | 0.131 | 2.34 | 60.0 | 0.35 | 15 | 30.1 | 2 |
⑦1 | 粉质粘土 | 9.4~13.1 | 29.9 | 18.9 | 0.84 | 0.101 | 11.44 | 70.0 | 0.30 | 21 | 29.8 | 2 |
⑦2 | 粉砂 | 23.0~27.5 | 27.1 | 19.1 | 0.76 | 0.125 | 23.75 | 80.0 | 0.30 | 25 | 34.0 | 2 |
[1] | TAN Y, WANG D. Characteristics of a large-scale deep foundation pit excavated by the central-island technique in Shanghai soft clay. I: Bottom-up construction of the central cylindrical shaft[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2013, 139(11): 1875-1893. |
[2] | SHEN J. Analyses and countermeasures on interaction among large-scale group excavation projects[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(S): 272-276. |
[3] | 陈锦剑, 王建华, 杜毅, 等. 两侧深基坑开挖影响下浅埋运营隧道的位移特性[J]. 地下空间与工程学报, 2011, 7(6): 1163-1167. |
CHEN Jinjian, WANG Jianhua, DU Yi, et al. Movement of the shallow operating tunnel due to adjacent deep excavation on both sides[J]. Chinese Journal of Underground Space and Engineering, 2011, 7(6): 1163-1167. | |
[4] | ZHANG H B, CHEN J J, FAN F, et al. Deformation monitoring and performance analysis on the shield tunnel influenced by adjacent deep excavations[J]. Journal of Aerospace Engineering, 2017, 30(2): B4015002. |
[5] | WANG J H, CHEN J J, LI M G. Concept and characters of deep excavation groups in urban underground space development[J]. Japanese Geotechnical Society Special Publication, 2015, 2(44): 1559-1562. |
[6] | WANG Z W, NG C W, LIU G B. Characteristics of wall deflections and ground surface settlements in[J]. Canadian Geotechnical Journal, 2005, 42(42): 1243-1254. |
[7] | 王卫东, 王浩然, 徐中华. 上海地区板式支护体系基坑变形预测简化计算方法[J]. 岩土工程学报, 2012(10): 1792-1800. |
WANG Weidong, WANG Haoran, XU Zhonghua. Simplified method of deformation prediction for excavations retained by embedded walls in Shanghai soft soil[J]. Chinese Journal of Geotechnical Engineering, 2012(10): 1792-1800. | |
[8] | 李明广, 徐安军, 董锋, 等. 下穿运营高铁及地铁的交通枢纽深基坑数值分析[J]. 岩土工程学报, 2014, 36(S2): 386-390. |
LI Mingguang, XU Anjun, Dong Feng, et al. Numerical study on a deep excavation of transportation hub underlying operating railways and a metro station[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(S2): 386-390. | |
[9] | 沈健. 超大规模基坑工程群开挖相互影响的分析与对策[J]. 岩土工程学报, 2012, 34(S1): 272-276. |
SHEN Jian. Analyses and countermeasures on interaction among large-scale group excavation projects[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(S1): 272-276. | |
[10] | 李明广, 陈锦剑, 徐安军, 等. 深基坑开挖与紧邻运营铁路的相互影响分析[J]. 地下空间与工程学报, 2015, 11(2): 435-439. |
LI Mingguang, CHEN Jinjian, XU Anjun, et al. Interactive behavior between the deep excavation and close operating railway[J]. Chinese Journal of Underground Space and Engineering, 2015, 11(2): 435-439. | |
[11] | 徐中华. 上海地区支护结构与主体地下结构相结合的深基坑变形性状研究[D]. 上海: 上海交通大学研究生院, 2007. |
[12] | 黄茂松, 朱晓宇, 张陈蓉. 基于周边既有建筑物承载能力的基坑变形控制标准[J]. 岩石力学与工程学报, 2012, 31(11): 2305-2311. |
HUANG Maosong, ZHU Xiaoyu, ZHANG Chenrong. Deformation controlling criterion for excavation based on bearing capacity of adjacent buildings[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(11): 2305-2311. |
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[2] | 章红兵,范凡,胡昊. 基坑群施工对邻近隧道影响与隧道保护[J]. 上海交通大学学报(自然版), 2016, 50(05): 803-809. |
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