| 引用本文: | 徐毅,赵钢,王茂枚,等.基于数值模拟的现浇混凝土暗管断面形式研究[J].灌溉排水学报,2018,37(10):94-99. |
| XU Yi,ZHAO Gang,WANG Maomei,et al.基于数值模拟的现浇混凝土暗管断面形式研究[J].灌溉排水学报,2018,37(10):94-99. |
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| 摘要: |
| 【目的】探索改变管道断面形式对混凝土暗管受力承载性能的影响。【方法】采用ANSYS数值模拟软件，模拟分析了竖椭圆形暗管在设计荷载工况下的受力承载特性，并与相同过水断面面积的圆形暗管进行了比较。【结果】长、短轴比1.3左右的竖椭圆形混凝土暗管在各种设计荷载工况下均能处于正常使用状态；设计荷载汽-10作用下，对比内径80 cm的圆形暗管，相同过水断面面积的竖椭圆形暗管在非灌溉期的强度安全因数提高约83%，在灌溉期的强度安全因数提高约41%。【结论】现浇混凝土暗管采用竖椭圆形的断面形式合理可行，且采用竖椭圆形比采用圆形具有更优的受力承载性能。 |
| 关键词: 混凝土暗管； 断面形式； 数值模拟 |
| DOI：10.13522/j.cnki.ggps.20180113 |
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| Determining the Sectional Shape of in-situ Casted Concrete Drain Pipe Based on Numerical Simulations |
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XU Yi， ZHAO Gang， WANG Maomei， ZHU Dadong， JIANG Baohua
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1.Hydraulic Resarch Insititue of Jiangsu Province, Nanjing 210017, China；2. Nantong Silt Dredging Machinery Co.，Ltd., Nantong 226404, China
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| Abstract: |
| 【Objective】 The purpose of this paper is to examine the effect of cross sectional shape of concrete drain pipeline casted in-situ on its bearing capacity. 【Method】 We used the ANSYS software to simulate and analyze the bearing capability of a vertical elliptical drain pipe under designed load, and compared it with the bearing capability of a circular pipe with the same cross-sectional area. 【Result】 Vertical elliptical covered concrete pipeline with long and short axle ratios of about 1.3 could be in normal use under various design load conditions; The strength safety factor of vertical elliptical covered concrete pipeline with the same cross-section area increased by about 83% in non-irrigation period and by about 41% in irrigation period. 【Conclusion】 It is rational and feasible to use the vertical elliptical section in in-situ casting concrete drain pipeline, and it improves the bearing capacity compared to the circular ones. |
| Key words: concrete drain pipeline; types of cross section; numerical simulation |
