埋地HDPE管道施工过程中装配应变分布规律的现场试验研究

尤佺; 张亚军; 王非; 杜延军; 周敏

doi:10.11779/CJGE201412017

埋地HDPE管道施工过程中装配应变分布规律的现场试验研究 English Version

1. 东南大学交通学院岩土工程研究所,江苏南京 210096; 2. 江苏省宜兴市建设局,江苏宜兴 214206

基金项目: 国家自然科学基金项目(51310105030,51108078,51278100); 江苏省自然科学基金面上项目(BK2013294,BK2012022)

详细信息

作者简介:
尤佺(1992- ),男,学士,主要从事地下工程方面的科研工作。E-mail: cnseuyq@gmail.com。

通讯作者:
杜延军

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出版历程
- 收稿日期: 2014-01-25
- 发布日期: 2014-12-25

Full-scale field tests on hoop strains of buried HDPE pipes during construction

1. Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 210096,China; 2. Construction Bureau of Yixing City, Yixing 214206, China

摘要

摘要: 现场测试数据表明HDPE双壁波纹管道在填土施工时会产生较大装配应力和应变。然而,目前关于HDPE管道服役期力学性能的研究和设计方法均忽略装配效应对管道力学特性的影响,高估了管道服役性能并带来安全隐患。通过现场试验,对管径600 mm HDPE双壁波纹管道填土施工过程中产生的径向挠度与管周环向应变进行实时监测;结果表明,管道施工填土产生的最大装配应变发生在管侧（与管轴线等深度的管壁处）,而管顶和管侧挠度近似相等;管顶挠度与填土高度和最大管周环向应变之间均存在良好线性关系。通过有限元数值模拟分析并综合现场试验数据,提出了基于填土高度的管顶挠度预测公式和基于管顶挠度的最大管周环向应变预测公式,可以方便快捷地预测HDPE管道装配应变。通过对比报道的两个现场试验的实测数据验证所得公式,结果表明所得公式预测值与实测管顶挠度的误差范围为7%~13%,表明该公式可准确计算施工填土时HDPE管道的管顶挠度。
- HDPE双壁波纹管道 /
- 现场试验 /
- 装配 /
- 环向应变 /
- 挠度
Abstract: Field test data show that the installation of HDPE pipes results in considerable additional strain and stress on the pipes. However, it has not been well addressed in previous studies. In this study, the 0.6 m-diameter HDPE pipes are used in the field tests to investigate the relationship among the hoop strains, vertical and horizontal deflections and thickness of soil cover. It is found that the hoop strains generated in the construction phase (i.e., installation of HDPE pipes) have a good linear relationship with the deflection and the thickness of soil cover. This finding is then validated by a series of finite element numerical simulations. Based on the FE analysis, an empirical relationship is proposed to predict the hoop strains on the HDPE pipes generated in the construction phase. The availability of the proposed method is validated by comparing the predicted values with the field measured ones reported in the previous studies. The results demonstrate that the proposed method has merits of satisfactory accuracy and easy use.
- double-wall corrugated HDPE pipe /
- field test /
- installation /
- hoop strain /
- deflection

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