| 现浇混凝土模板侧压力研究 |
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| 引用本文： | 汪水清,刘方.现浇混凝土模板侧压力研究[J].世界桥梁,2012(2):42-45. |
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| 作者姓名： | 汪水清 刘方 |
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| 作者单位： | 宁安铁路有限责任公司;中铁大桥局集团桥科院有限公司;桥梁结构安全与健康湖北省重点实验室 |
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| 摘 要： | 通过在某桥墩模板内侧埋设压力盒进行墩身混凝土的侧压力监测,发现随着混凝土的浇注,对应测点压力迅速上升,达到峰值后减小,然后保持不变;各测点形成最大侧压力耗时7.6～12.8h;实测最大侧压力为规范计算值的1.01～2.2倍。结合实测数据,在分析国内、外有关侧压力计算公式之后,偏于安全考虑,建议修订公路规范中模板侧压力计算公式。
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| 关 键 词： | 现浇混凝土 模板 侧压力 研究 |
Study of Lateral Pressure of Cast-in-place Concrete Formwork |
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| WANG Shui-qing,LIU Fang.Study of Lateral Pressure of Cast-in-place Concrete Formwork[J].World Bridges,2012(2):42-45. |
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| Authors: | WANG Shui-qing LIU Fang |
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| Institution: | 2,3(1.Ning′an Railway Co.,Ltd.,Wuhu 241000,China;2.Bridge Science Research Institute Ltd.,China Railway Major Bridge Engineering Group,Wuhan 430034,China;3.Key Laboratory of Bridge Structure Safety and Health of Hubei Province,Wuhan 430034,China) |
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| Abstract: | The lateral pressure of pier shaft concrete of a bridge was monitored by burying pressure box in the pier formwork.It is found that the pressure of the corresponding testing point rapidly rises as the concrete is casted,decreases after reaching its crest value,and then keeps constant.7.6～12.8 h had been consumed when greatest lateral pressure appeared in all the testing points.The measured greatest lateral pressure is 1.01～2.2 times of that recorded in the code.Based on the measured data and the analysis of the lateral pressure calculation formula at home and abroad,and out of the consideration of safety,it is suggested that the calculation formulae of formwork lateral pressure in the Highway Code should be revised. |
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| Keywords: | cast-in-place concrete formwork lateral pressure study |
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