钢管拱仰卧拼装分段竖转施工技术
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摘要
以某特大桥钢管拱施工为例,研究适应于艰险山区的拱桥施工方法。即在两岸山坡顺势搭设支架,仰卧拼装拱肋,设置扣拉索锚碇体系及转铰结构。具体为首先扳起上段拱肋与下段拱肋形成半拱骨架后,再次竖转下放,先跨中合龙再拱脚固结,完成拱肋安装。这种仰卧拼装分段竖转的施工方法,在本桥实践中得到安全运用、实现了高精度合龙。
Taking the construction of a steel pipe arch bridge as an example,a new method of arch bridge construction in difficult and dangerous mountainous areas is studied.In the method supports areset up on the slopes along the banks,the arch rib is assembled lying on its own back,and the anchorage system and rotary hinges is set up.The upper arch rib and the lower arch ribis pulled up to form a semiarch first,then the semiarchis transferred to a lower level by vertical rotation,and then the closing of arch bridge and consolidation of the arch foot is completed to accomplish arch rib construction.This construction method of vertical rotary and assembly lying on its own back is applied safely in the bridge,and high-precision closure is achieved.
Taking the construction of a steel pipe arch bridge as an example,a new method of arch bridge construction in difficult and dangerous mountainous areas is studied.In the method supports areset up on the slopes along the banks,the arch rib is assembled lying on its own back,and the anchorage system and rotary hinges is set up.The upper arch rib and the lower arch ribis pulled up to form a semiarch first,then the semiarchis transferred to a lower level by vertical rotation,and then the closing of arch bridge and consolidation of the arch foot is completed to accomplish arch rib construction.This construction method of vertical rotary and assembly lying on its own back is applied safely in the bridge,and high-precision closure is achieved.
引文
[1]中铁工程设计咨询集团有限公司.大理至瑞丽铁路澜沧江特大桥施工图[Z].北京:中铁工程设计咨询集团有限公司,2009.
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[3]孔宪全.大瑞铁路钢管拱劲性骨架二次竖转施工方案设计[D].湘潭:湖南科技大学,2017.
[4]詹昊,廖海黎.拱桥钢箱吊杆驰振稳定性数值计算研究[J].武汉理工大学学报(交通科学与工程版),2018,42(5):766-771.
[5]张爱花.澜沧江特大桥提篮拱竖转施工方案比选[J].桥梁建设,2010(3):79-82.
[6]高兴泽,范大意,杨仁康.景德镇白鹭大桥钢塔竖向转体施工技术[J].铁道工程学报,2007(5):55-62.
[7]李述宝,彭颇.变角度扣索锚碇体系设计[J].山西建筑,2011(4):151-152.
[8]魏宇.澜沧江特大桥钢管拱二次竖转的计算与分析[J].铁道勘察,2015(2):116-118.
[2]肖世波.澜沧江特大桥钢管拱劲性骨架二次竖转施工关键技术[J].黑龙江交通科技,2013(2):84-85.
[3]孔宪全.大瑞铁路钢管拱劲性骨架二次竖转施工方案设计[D].湘潭:湖南科技大学,2017.
[4]詹昊,廖海黎.拱桥钢箱吊杆驰振稳定性数值计算研究[J].武汉理工大学学报(交通科学与工程版),2018,42(5):766-771.
[5]张爱花.澜沧江特大桥提篮拱竖转施工方案比选[J].桥梁建设,2010(3):79-82.
[6]高兴泽,范大意,杨仁康.景德镇白鹭大桥钢塔竖向转体施工技术[J].铁道工程学报,2007(5):55-62.
[7]李述宝,彭颇.变角度扣索锚碇体系设计[J].山西建筑,2011(4):151-152.
[8]魏宇.澜沧江特大桥钢管拱二次竖转的计算与分析[J].铁道勘察,2015(2):116-118.