土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (5): 705-708.

• 工程实录 • 上一篇    下一篇

泡沫混凝土在地下通道肥槽中的综合应用

周立新1,2，李建华1,2，黄晓波1,2，姚志华3   

  1. （1.北京泰斯特工程检测有限公司，北京 102600;2.中基北方国际工程建设有限公司，北京 102300;3.空军工程大学 航空工程学院 机场建筑工程教研室，西安 710038）
  • 收稿日期:2021-04-09 修回日期:2021-04-30 出版日期:2022-10-30 发布日期:2022-10-24
  • 作者简介:周立新（1977-），男，硕士，高级工程师，国家注册土木工程师（岩土），研究方向为机场岩土工程设计、试验检测、地基处理等。
  • 基金资助:
    国家自然科学基金项目（41772337）

Application of Foam Concrete in Foundation Trench Backfill of an Underground Passageway

ZHOU Lixin1,2, Li Jianhua1,2, HUANG Xiaobo1,2， YAO Zhihua3   

  1. (1.Beijing Taisite Engineering Testing Co. Ltd., Beijing 102600；
    2.Zhongji North International Engineering Construction Co. Ltd., Beijing 102300；
    3.Department of Airport Construction Engineering, College of Aeronautics Engineering, Air Force Engineering University, Xi'an 710038)
  • Received:2021-04-09 Revised:2021-04-30 Online:2022-10-30 Published:2022-10-24

摘要： 肥槽作为地下通道的施工作业面，因其空间狭小且深度较大，在主体结构完成后回填施工困难，传统处理方法施工不便且压实效果较差，加固处理不当易导致渗水和不均匀沉降等工程问题，造成上部结构局部开裂、损毁。针对地下通道工程建设需要，以西北某地下工程为例，对地下通道肥槽回填处理方法开展研究，通过方案比选，提出了采用泡沫混凝土浇筑的处理方法，详细阐述了处理施工设计方案和技术要点，并结合工后外观检查、物理力学性质试验和沉降观测，对回填处理效果进行了检验评价。结果表明，肥槽经泡沫混凝土回填处理，外观质量良好，强度和沉降均满足要求，地下通道无渗水现象，上部结构也未出现沉降裂缝或错断。研究成果可为类似工程提供参考经验。

关键词: 泡沫混凝土, 地下通道, 肥槽, 强度, 沉降

Abstract: As the operation side of the underground passage, the foundation trench is difficult to backfilled with an appropriate compacted after the completion of the main structure due to its narrow space and large depth. The traditional treatment method is inconvenient, while the compaction result is poor. The improper treatment could frequently lead to numerous post construction engineering problems, such as water-seepage and differential settlement, resulting in partial cracking and damage of the superstructure. From the underground passageway engineering construction, the study on the backfill treatment method of foundation trench of the underground passageway presented in this paper from the case history in Northwest China. Through the comparative study of different backfill approaches, the treatment method using the foam concrete is proposed, and the construction design method and technical aspects are elaborated in detail. Combined with the appearance test, physical mechanics test and settlement observation of the foam concrete after construction, the effect is evaluated. The results show that, the backfill treatment of the foundation trench by the foam concrete has a good appearance quality. Meanwhile, the strength and settlement aspects both meet the requirements. There is no seepage observed in the underground passageway, and no settlement cracks or faults are found in the superstructure. The results can provide a reference experience for similar projects, which have a great practical significance.

Key words: Foam Concrete, Underground Passageway, Foundation Trench, Strength, Settlement

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