中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊
重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2022, Vol. 41 ›› Issue (01): 103-110.DOI: 10.3969/j.issn.1674-0696.2022.01.15

• 交通基础设施工程 • 上一篇    

管道沟槽回填泡沫轻质土变形协调试验研究

魏丽敏1，李宏泉2，何群1，廖鹏庆1，鞠家佳1   

  1. (1. 中南大学 土木工程学院，湖南 长沙 410075； 2. 湖南省交通规划勘察设计院有限公司，湖南 长沙 410200)
  • 收稿日期:2020-11-28 修回日期:2021-12-08 发布日期:2022-01-20
  • 作者简介:魏丽敏(1965—)，女，河南舞阳人，教授，主要从事岩土工程科研与教学工作。E-mail：lmwei@csu.edu.cn 通信作者：何群(1969—)，男，江苏扬州人，讲师，博士，主要从事岩土工程科研与教学工作。E-mail：hequn@csu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51878671)；湖南省交通建设科技项目（201508）

Experimental Investigation on Deformation Compatibility for Foamed Lightweight Soil Used as Backfill of Pipe Trench

WEI Limin1, LI Hongquan2, HE Qun1, LIAO Pengqing1, JU Jiajia1   

  1. (1. School of Civil Engineering, Central South University, Changsha 410075, Hunan, China; 2. Hunan Provincial Communications Planning, Survey & Design Institute Co., Ltd., Changsha 410200, Hunan, China)
  • Received:2020-11-28 Revised:2021-12-08 Published:2022-01-20

PDF

摘要： 为了研究管道沟槽回填区与道路结构的变形协调性，开展了雨水管道沟槽回填泡沫轻质土变形协调现场试验；研究了回填泡沫轻质土分别与HDPE管道及沟槽周土体的变形协调特性；分析了沟槽回填及路基填筑过程中，垫层与基层、泡沫轻质土与管道及管槽界面的相对位移发展趋势。结果表明：回填泡沫轻质土与沟槽结合紧密，但回填区与HDPE管顶、基层与垫层之间可能发生脱空；管顶实测最大脱空量不超过4.00 mm，后续设计可选用较大刚度的管道环予以防范；为避免垫层与基层之间出现脱空，建议采用厚度不小于25 cm的优质黏土垫层。

关键词: 道路工程；泡沫轻质土；沟槽回填；HDPE管道；变形协调

Abstract: To study the deformation compatibility between pipe trench backfill and road structure, the field test on deformation compatibility for foamed lightweight soil used as backfill of rainwater pipe trench was carried out. The deformation compatibility characteristics between foamed lightweight soil backfill and HDPE pipe as well as soil around the trench were investigated, and the development trend of relative displacement between cushion layer and base layer, the foamed lightweight soil and pipe as well as the pipe trench interface during the process of trench backfill and subgrade filling was analyzed. The results shows that the foamed lightweight soil backfill is closely integrated with the pipe trench, while voids may occur between backfill and HDPE pipe top, base layer and cushion layer. The measured maximum void on the pipe top shall not exceed 4.00 mm, and pipe ring with larger stiffness can be selected for void prevention in subsequent design. To avoid the void between the cushion layer and base layer, it is recommended that the high-quality clay with a thickness of not less than 25 cm can be used as cushion layer.

Key words: highway engineering; foamed lightweight soil; trench backfill; HDPE pipe; deformation compatibility

中图分类号: