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南京软土地区基坑墙体变形性状研究

万星, 戈铭, 贺智江, 邓松, 丁建文

万星, 戈铭, 贺智江, 邓松, 丁建文. 南京软土地区基坑墙体变形性状研究[J]. 岩土工程学报, 2019, 41(S1): 85-88. DOI: 10.11779/CJGE2019S1022
引用本文: 万星, 戈铭, 贺智江, 邓松, 丁建文. 南京软土地区基坑墙体变形性状研究[J]. 岩土工程学报, 2019, 41(S1): 85-88. DOI: 10.11779/CJGE2019S1022
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WAN Xing, GE Ming, HE Zhi-jiang, DENG Song, DING Jian-wen. Characteristics of deformation of retaining wall due to deep excavation in Nanjing[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 85-88. DOI: 10.11779/CJGE2019S1022
Citation: WAN Xing, GE Ming, HE Zhi-jiang, DENG Song, DING Jian-wen. Characteristics of deformation of retaining wall due to deep excavation in Nanjing[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 85-88. DOI: 10.11779/CJGE2019S1022
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南京软土地区基坑墙体变形性状研究  English Version

  • 1. 东南大学岩土工程研究所,江苏 南京 210096;
    2. 江北新区枢纽经济发展管理办公室,江苏 南京 211899

基金项目: 国家自然科学基金项目（51378118）; 国家科技支撑项目（2015BAB07B06）; 水利部公益性行业专项经费项目（201401006-2）
详细信息
    作者简介:

    万星(1994—),男,硕士研究生,主要从事基坑工程、桩基工程等方面的研究。E-mail:220162530@seu.edu.cn。

    通讯作者:

    丁建文，E-mail：jwding@seu.edu.cn

Characteristics of deformation of retaining wall due to deep excavation in Nanjing

  • 1. Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 210096, China;
    2.Office of Economic Development Management, District ffice of Jiangbei New Area, Nanjing 211899, China

摘要

    摘要
  • 摘要: 依托南京江北地区某线形隧道基坑,搜集了35个南京地区支挡结构加内支撑的明挖基坑案例,对南京软土地区基坑开挖的墙体变形性状进行了比较系统的探讨。研究表明：墙体的最大侧移量随基坑开挖深度的增大而明显增大,变化范围为0.05%He~0.69%He,平均值约为0.24%He;最大侧移深度均位于He-8~He+2之间,其中多数位于基坑开挖底面以上;南京地区侧墙变形具有显著的时空效应,施工过程应注意尽可能缩短坑底暴露时间;SMW工法支护对于墙体侧移的控制能力相比地连墙及钻孔桩支护较弱。另外,围护结构的插入比和基坑的长宽比亦会对墙体变形产生影响。
    Abstract: Based on a linear foundation pit in Jiangbei, Region of Nanjing, a database of 35 case histories was collected. The characteristics of lateral displacement in Nanjing due to deep excavation are studied systematically. The research shows that the maximum lateral displacement increases with the excavation depth, which ranges from 0.05%He to 0.69%He, with an average value of 0.24%He. The maximum lateral wall displacements along depth occur within the range from He-8 to He+2 and most are above the excavation surface. The effects of time-space characteristics are found remarkable in lateral displacement of excavation in Nanjing. Hence, the time of exposure of the pit bottom should be as short as possible in construction. The SMW engineering method is relatively weaker in restraining lateral displacement than diaphragm wall and bored pile wall. In addition, the insertion ratio and length-width ratio can both affect the lateral displacement.
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    • 参考文献(7)
  • [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.
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    [6] 李俊才, 张倬元, 罗国煜. 深基坑支护结构的时空效应研究[J].岩土力学, 2003, 24(5): 812-816.
    (LI Jun-cai, ZHANG Zhuo-yuan, LUO Guo-yu.Study on effects of time-space of retaining structures of the deep-foundation pit excavation[J]. Rock and Soil Mechanics, 2003, 24(5): 812-816. (in Chinese))
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出版历程
  • 收稿日期:  2019-04-27
  • 发布日期:  2019-07-14

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