东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (10): 1463-1468.DOI: 10.12068/j.issn.1005-3026.2018.10.019

• 资源与土木工程 • 上一篇    下一篇

近接浅基础建筑物深基坑变形特性及关键参数

韩健勇1, 赵文1, 关永平2, 贾鹏蛟1   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 中国铁路设计集团有限公司 市轨道交通设计研究院, 天津300142)
  • 收稿日期:2018-02-28 修回日期:2018-02-28 出版日期:2018-10-15 发布日期:2018-09-28
  • 通讯作者: 韩健勇
  • 作者简介:韩健勇(1990-),男,山东德州人,东北大学博士研究生; 赵文(1962-),男,内蒙古乌兰察布人,东北大学教授,博士生导师.冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51578116); 中央高校基本科研业务费专项资金资助项目(N160106006).国家自然科学基金资助项目(51171041).

Deformation Characteristics and Key Parameters of Deep Excavation Adjacent to Buildings with Shallow Foundations

HAN Jian-yong1, ZHAO Wen1, GUAN Yong-ping2, JIA Peng-jiao1   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. Urban Rail Transit System Design and Research Institute, China Railway Design Corporation, Tianjin 300142, China.
  • Received:2018-02-28 Revised:2018-02-28 Online:2018-10-15 Published:2018-09-28
  • Contact: ZHAO Wen
  • About author:-
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摘要: 基于现场实测数据和数值模拟对深基坑围护结构和既有建筑物的变形特性进行了研究.采用有限元方法建立数值计算模型,结合现场实测数据和已有文献对邻近既有建筑物深基坑开挖变形规律进行参数分析,全面揭示了不同工况下围护结构变形与建筑物沉降的关系.结果表明:桩锚支护结构在锦州地区深基坑应用效果较好,控制变形能力强;矩形基坑的坑角效应显著,坑角处平面应变比(PSR)值约为0.4~0.6;建筑物基础埋深和基坑开挖深度对建筑物平均沉降(δva)与围护结构最大侧移量(δhm)的线性关系影响不大;建筑物与围护结构距离L不同时,δva与δhm数据离散性较大,随着L的增加,δvahm逐渐减小.

关键词: 桩锚支护, 变形特性, 建筑物沉降, 数值模拟, 深基坑

Abstract: Based on the in situ observation and numerical simulation, the deformation characteristics of the retaining structure of a deep excavation and the existing building were investigated. According to the in situ observations and available literatures, parametric studies were conducted using FEM to investigate the deformational behaviors of the excavation adjacent to existing building. The relationships between the deformation of the retaining structures and the settlement of the adjacent building under various construction conditions were fully revealed. Results showed that the tieback anchored pile wall has a good deformation control capacity and can be applied effectively in Jinzhou area. The corner effect of the rectangular excavation is significant with a plain strain ration (PSR)of about 0.4~0.6.The linear relationship between the average building settlement (δva) and the maximum horizontal deformation of the retaining structure (δhm) is slightly influenced by the existing foundation depth and the excavation depth. The discreteness of δva and δhm appears when the distance between the building and the retaining structure (L) changes, however the δvahm decreases gradually with the increase of L.

Key words: tieback anchored pile wall, deformation characteristics, building settlement, numerical simulation, deep excavation

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