| 引用本文: | 赵雅宏,马保松,张海丰,何春良,史国棚.既有管道与内衬叠合界面受力性能及计算方法[J].哈尔滨工业大学学报,2020,52(11):167.DOI:10.11918/201904203 |
| ZHAO Yahong,MA Baosong,ZHANG Haifeng,HE Chunliang,SHI Guopeng.Mechanical behavior and calculation method of interface between host pipeline and lining[J].Journal of Harbin Institute of Technology,2020,52(11):167.DOI:10.11918/201904203 |
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| 摘要: |
| 为获悉应用非开挖离心喷涂法对缺陷管道的修复效果,并揭示修复后界面及“管道-内衬”体系的破坏机理,建立两层叠合曲梁模型,并应用变截面法推导不同材料叠合曲梁结构的截面应力及界面应力的解析公式,以修复后管道受集中荷载作用的三边承载力试验为例,验证公式的准确性.给出“管道-内衬”体系协调变形的判断标准,即当界面抗力大于荷载时形成叠合结构,抗力小于荷载时形成复合结构.通过对相关参数分析,得到界面剪切应力τ和内衬厚度与既有管道壁厚比值β、弹性模量比η和既有管道直径D的简化公式,与力学模型的精确结果误差小于1%.最终给出既有管道不同破坏模式的内衬修复设计方法. |
| 关键词: 钢筋混凝土管 叠合曲梁 协调变形 设计方法 内衬壁厚 |
| DOI：10.11918/201904203 |
| 分类号:TU992.2 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2017YFC0805000)； 国家自然科学基金(51979254) |
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| Mechanical behavior and calculation method of interface between host pipeline and lining |
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ZHAO Yahong1,MA Baosong2,ZHANG Haifeng1,HE Chunliang1,SHI Guopeng1
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(1.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China; 2.School of Civil Engineering, Sun Yat-sen University, Zhuhai 519082, Guangdong, China)
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| Abstract: |
| To understand the repair effect of trenchless centrifugal spraying method on defective pipeline and reveal the failure mechanism of the repaired interface and “pipeline-lining” system, a composite curved beam model was established. Analytical formulae of the cross section stress and the interface stress of the composite curved beam with different materials were derived by using the method of variable cross section, and the accuracy of the formulae was verified through the Three Edge Bearing Test (TEBT) of the repaired pipeline under concentrated load. The criterion for judging the coordinated deformation of the “pipe-lining” system was given—when the resistance of the interface was greater than the load, a composite structure was formed; otherwise, a unitized structure was formed. Through the analysis of the parameter study, a simplified interface shear stress formula was obtained based on the ratio β of lining thickness to host wall thickness,the ratio η of elastic modulus, and the diameter of the existing pipe D. The accuracy error between the proposed model and the mechanical model was less than 1%. Finally, the design method of lining repair for existing pipelines with different failure modes was given. |
| Key words: reinforced concrete pipe composite curved beam co-deformation design method lining thickness |
