叠合梁斜拉桥桥面板超高性能混凝土湿接缝应用研究

作者：张兴志方明山刘佳玲庄冬利肖汝诚

单位：浙江杭绍甬高速公路有限公司浙江省交通投资集团有限公司同济大学土木工程学院

摘要：叠合梁斜拉桥施工复杂,其施工工序对内力影响较大,施工工序不当可能造成桥面板受力不均,产生裂缝。为避免施工过程中桥面板开裂,结合工程实例,对叠合梁施工期桥面板进行受力分析,并提出采用超高性能混凝土(UHPC)湿接缝的方法提高强度,防止裂缝产生。通过工艺试验验证了UHPC材料满足湿接缝材料要求后,在富翅门大桥中应用了UHPC湿接缝。由富翅门大桥的施工效果可知,采用UHPC湿接缝代替普通混凝土湿接缝,施工效果良好。由于UHPC材料早期强度高的特点,施工工期显著缩短,对于跨海桥梁或沿海桥梁,在面临台风等恶劣天气时,可抢先完成合龙,避免不利影响。

关键词：桥梁工程斜拉桥叠合梁桥面板受力性能超高性能混凝土湿接缝施工工艺

作者简介：张兴志,高级工程师,E-mail:83511136@qq.com。
基金：交通运输行业重点科技项目清单项目(2019-MS1-016)；浙江省交通运输厅科技计划项目(2019-GCKY-01)。 -页码-：27-30

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参考文献[1] 吴泽生,黄宜龙.港珠澳大桥钢混组合梁设计与施工技术分析[J].安徽建筑,2020,27(2):130-134.
[2] 王梓龙.解读叠合梁斜拉桥混凝土桥面板滞后浇筑湿接缝的工序[J].四川水泥,2018(6):325.
[3] 胡俊,曾一峰,贾俊峰.叠合梁斜拉桥混凝土桥面板滞后浇筑湿接缝的工序研究[J].铁道建筑,2016(4):30-34.
[4] 苏海成.组合梁斜拉桥桥面板抗裂性研究与工艺控制[J].山西建筑,2017,43(27):146-147.
[5] 曾亿忠,刘宁波,别亚威.中央单索面混合腹板矮塔斜拉桥主梁施工关键技术[J].施工技术,2020,49(15):54-56.
[6] 马成涛,王晗,刘佳琪.施工期转体斜拉桥有效预应力对线形控制影响研究[J].施工技术,2019,48(23):23-27.
[7] 康学云,徐文冰,郭佳嘉,等.南京长江第五大桥大体积混凝土温度裂缝智能控制技术研究[J].施工技术,2019,48(17):24-27,84.
[8] 史庆春,孙黎明,张征,等.双塔双索面半漂浮体系预应力混凝土斜拉桥结构稳定性分析[J].施工技术,2019,48(15):99-102.

Study on the Application of Ultra-high Performance Concrete Wet Joints of Composite Beam Cable-stayed Bridge Deck

ZHANG Xingzhi FANG Mingshan LIU Jialing ZHUANG Dongli XIAO Rucheng

(Zhejiang Hangzhou-Shaoxing-Ningbo Expressway Co., Ltd. Zhejiang Transportation Investment Group Co., Ltd. College of Civil Engineering, Tongji University)

Abstract: The construction of a composite beam cable-stayed bridge is complicated, and its construction process has a greater impact on internal forces. Improper construction process may cause uneven force on the bridge deck and cause cracks. In order to avoid the cracking of the bridge deck during the construction process, combined with engineering examples, the force analysis of the bridge deck during the construction of the composite beam was carried out, and the ultra-high performance concrete(UHPC) wet joints were used to improve the strength and prevent cracks. After verifying that the UHPC material met the requirements of wet joints by the process test, UHPC wet joints were applied in Fuchimen Bridge. According to the construction effect of Fuchimen Bridge, the use of UHPC wet joints instead of ordinary concrete wet joints had good construction effects. Due to the high early strength of UHPC materials, the construction period was significantly shortened. For sea-crossing bridges or coastal bridges, in the face of severe weather such as typhoons, the closure can be completed in advance to avoid adverse effects.

Keywords: bridges; cable stayed bridges; composite bridge deck; mechanical behavior; ultra-high performance concrete; wet joint; construction

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