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隧道建设（中英文） ›› 2019, Vol. 39 ›› Issue (11): 1797-.DOI: 10.3973/j.issn.2096-4498.2019.11.007

• 研究与探索 • 上一篇    下一篇

杭州狭长软土基坑支护侧移规律与解析预测方法研究

马元1， 刘亚竞2， 3， 侯永茂1， 王立忠2， 3， 洪义2， 3, *   

  1. (1. 上海隧道工程有限公司， 上海 200082； 2. 浙江大学建筑工程学院， 浙江 杭州 310058； 3. 浙江大学 浙江省海洋岩土工程与材料重点试验室， 浙江 杭州 310058)
  • 收稿日期:2019-06-24 出版日期:2019-11-20 发布日期:2020-04-04
  • 作者简介:马元（1980—）， 男， 上海人， 2007年毕业于中国矿业大学， 桥梁与隧道工程专业， 硕士， 高级工程师， 主要从事基坑变形预测与支护体系设计加固方面的研究工作。E-mail: 79561279@qq.com。*通信作者： 洪义， E-mail: yi_hong@zju.edu.cn。
  • 基金资助:

    浙江省自然科学基金资助项目（LQ18E080004）； 上海市青年科技启明星计划（16QB1403400）

Support Wall Lateral Deflection Rule and Prediction of Deep Narrow Foundation in Hangzhou Soft Clay

MA Yuan 1, LIU Yajing2, 3, HOU Yongmao1, WANG Lizhong2, 3, HONG Yi2, 3, *   

  1. (1. Shanghai Tunnel Engineering Co., Ltd., Shanghai 200082, China; 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China; 3. Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province, Zhejiang University, Hangzhou 310058, Zhejiang, China)
  • Received:2019-06-24 Online:2019-11-20 Published:2020-04-04

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摘要：

In order to reduce the influence of deep narrow foundation pit construction on adjacent properties in urban area in Hangzhou, the characteristics of the support wall lateral deflection are analyzed and the corresponding analytical prediction method is proposed. The support wall lateral deflections of the deep narrow foundation pits at Wenyi West Road, Qingchun Station, Qiutao Station, Xingtang Station and Qingnian Station in Hangzhou soft clay are monitored and compared with those of deep foundation pits in Zhejiang and deep narrow foundation pits in Shanghai, Taipei and Singapore. The results show that the maximum support wall lateral deflection of the foundation pit on Wenyi West Road, 0.20%He ~0.25%He, where He is the maximum excavation depth, is close to that in Shanghai(0.15%He~0.41% He), but is smaller than those in Zhejiang, Taipei and Singapore(0.27% He~0.62% He); which is related to the high tangential modulus of Hangzhou soil and small width of the foundation pit. The support wall lateral deflection of the narrow deep foundation pits in Hangzhou can be precisely predicted based on the representative stressstrain relationship at site and the modified mobilisable strength design (MMSD) method.

关键词: 杭州软土地区, 狭长深基坑, 支护侧移, 修正强度发挥解析预测理论

Abstract:

In order to reduce the influence of deep narrow foundation pit construction on adjacent properties in urban area in Hangzhou, the characteristics of the support wall lateral deflection are analyzed and the corresponding analytical prediction method is proposed. The support wall lateral deflections of the deep narrow foundation pits at Wenyi West Road, Qingchun Station, Qiutao Station, Xingtang Station and Qingnian Station in Hangzhou soft clay are monitored and compared with those of deep foundation pits in Zhejiang and deep narrow foundation pits in Shanghai, Taipei and Singapore. The results show that the maximum support wall lateral deflection of the foundation pit on Wenyi West Road, 0.20%He ~0.25%He, where He is the maximum excavation depth, is close to that in Shanghai(0.15%He~0.41% He), but is smaller than those in Zhejiang, Taipei and Singapore(0.27% He~0.62% He); which is related to the high tangential modulus of Hangzhou soil and small width of the foundation pit. The support wall lateral deflection of the narrow deep foundation pits in Hangzhou can be precisely predicted based on the representative stressstrain relationship at site and the modified mobilisable strength design (MMSD) method.

Key words: Hangzhou soft clay area, deep narrow foundation pit, support wall lateral deflection, modified mobilisable strength design (MMSD) method

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