重载铁路桥梁支座顶升更换施工技术
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Zheng Ruliang
( Central Yunnan Railway Construction Headquarters of China Railway Kunming Bureau Group Co. , Ltd. , Kunming 650011, China)
Abstract: Diseases such as settlement and tilt of bridge piers were easy to occur under bridge heaped load and
construction technology of replacing bearing by jacking for heavy haul railway bridge was carried out.
Considering the characteristics of short construction time, narrow working space, numerous professional
关键词:重载铁路;桥梁支座;顶升;更换;施工技术 中图分类号: U455郾 43摇 摇 文献标识码: B DOI:10. 19630 / j. cnki. tdkc. 201904210001 开放科学( 资源服务) 标识码( OSID) :
Construction Technology of Lifting and Replacing Railway Bridge Bearings
2000 kN per one can meet the jacking鄄up weight requirements of bridge; (2) The local compressive stress of
C25 concrete in the existing pier cap is 12郾 526 MPa, and the local pressure is 885 kN, which can both meet
重载铁路桥梁支座顶升更换施工技术:郑汝亮
131
文章编号:1672 7479(2019)05 0131 05
重载铁路桥梁支座顶升更换施工技术
郑汝亮
( 中国铁路昆明局集团有限公司滇中铁路建设指挥部,云南昆明摇 650011)
百度文库
摇 摇 摘摇 要:在深厚软土地区,桥下堆载与重车通行易引起桥墩沉降及倾斜,致使桥梁支座纵向位移超 限。 以大丽铁路某特大桥为工程依托,开展铁路桥梁支座顶升更换施工技术的应用研究。 考虑运营铁 路天窗期施工作业时间短、作业面狭窄、涉及专业施工内容多和安全风险高等特点,提出了用两台千斤 顶同步顶升更换既有铁路桥梁支座的方案,并计算分析了千斤顶的选取、桥墩局部承压和梁缝缩小值等 技术参数。 结果表明:(1) 采用两台 DYG200 型号的千斤顶,单台起重量2 000 kN,满足顶升重量要求; (2) 既有桥墩顶帽 C25 钢筋混凝土局部承受压应力为 12郾 526 MPa,局部压力为 885 kN,满足规范要求; (3) 调整支座的梁体顶升高度为 20 mm,更换支座的梁体顶升高度为 88 ~ 92 mm,顶升高度满足现场施 工需要;(4) 顶升更换既有铁路桥梁支座施工技术对铁路桥梁支座纵向位移超限病害控制效果明显。
the requirements of the code; (3) The jacking鄄up height of girder whose supports would be adjusted is 20mm,
and the jacking鄄up height of girder whose supports would be replaced is from 88 mm to 92 mm. The jacking
construction content and high safety risk in maintenance time of existing operating railway, a scheme of
replacing existing railway bridge bearings with two jacks jacking鄄up synchronously was put forward, and the
132
铁摇 道摇 勘摇 察
2019 年第 5 期
effect on controlling the longitudinal displacement over鄄limit disease of railway bridge bearings. Key words: Heavy haul railway; Bridge bearing; Jacking up; Replacement; Construction technology
technical parameters such as the selection of jacks, local bearing capacity of piers and reduction value of beam
crevice were calculated and analyzed. The results show that: (1) Two DYG200 jacks with lifting weight of
height can meet requirements of field construction;
收稿日期:2019 04 21 作者简介:郑汝亮(1975—) ,男,2001 年毕业于兰州铁道学院交通土建 工程( 铁道工程) 专业,工学学士,高级工程师。
(4) The construction technology of replacing bearing for existing railway bridge by jacking has obvious
heavy vehicle traffic in deep soft soil area, which would result in the longitudinal displacement over鄄limit
disease of the bridge bearing. Based on a super large bridge in DaLi Railway, the application research on
( Central Yunnan Railway Construction Headquarters of China Railway Kunming Bureau Group Co. , Ltd. , Kunming 650011, China)
Abstract: Diseases such as settlement and tilt of bridge piers were easy to occur under bridge heaped load and
construction technology of replacing bearing by jacking for heavy haul railway bridge was carried out.
Considering the characteristics of short construction time, narrow working space, numerous professional
关键词:重载铁路;桥梁支座;顶升;更换;施工技术 中图分类号: U455郾 43摇 摇 文献标识码: B DOI:10. 19630 / j. cnki. tdkc. 201904210001 开放科学( 资源服务) 标识码( OSID) :
Construction Technology of Lifting and Replacing Railway Bridge Bearings
2000 kN per one can meet the jacking鄄up weight requirements of bridge; (2) The local compressive stress of
C25 concrete in the existing pier cap is 12郾 526 MPa, and the local pressure is 885 kN, which can both meet
重载铁路桥梁支座顶升更换施工技术:郑汝亮
131
文章编号:1672 7479(2019)05 0131 05
重载铁路桥梁支座顶升更换施工技术
郑汝亮
( 中国铁路昆明局集团有限公司滇中铁路建设指挥部,云南昆明摇 650011)
百度文库
摇 摇 摘摇 要:在深厚软土地区,桥下堆载与重车通行易引起桥墩沉降及倾斜,致使桥梁支座纵向位移超 限。 以大丽铁路某特大桥为工程依托,开展铁路桥梁支座顶升更换施工技术的应用研究。 考虑运营铁 路天窗期施工作业时间短、作业面狭窄、涉及专业施工内容多和安全风险高等特点,提出了用两台千斤 顶同步顶升更换既有铁路桥梁支座的方案,并计算分析了千斤顶的选取、桥墩局部承压和梁缝缩小值等 技术参数。 结果表明:(1) 采用两台 DYG200 型号的千斤顶,单台起重量2 000 kN,满足顶升重量要求; (2) 既有桥墩顶帽 C25 钢筋混凝土局部承受压应力为 12郾 526 MPa,局部压力为 885 kN,满足规范要求; (3) 调整支座的梁体顶升高度为 20 mm,更换支座的梁体顶升高度为 88 ~ 92 mm,顶升高度满足现场施 工需要;(4) 顶升更换既有铁路桥梁支座施工技术对铁路桥梁支座纵向位移超限病害控制效果明显。
the requirements of the code; (3) The jacking鄄up height of girder whose supports would be adjusted is 20mm,
and the jacking鄄up height of girder whose supports would be replaced is from 88 mm to 92 mm. The jacking
construction content and high safety risk in maintenance time of existing operating railway, a scheme of
replacing existing railway bridge bearings with two jacks jacking鄄up synchronously was put forward, and the
132
铁摇 道摇 勘摇 察
2019 年第 5 期
effect on controlling the longitudinal displacement over鄄limit disease of railway bridge bearings. Key words: Heavy haul railway; Bridge bearing; Jacking up; Replacement; Construction technology
technical parameters such as the selection of jacks, local bearing capacity of piers and reduction value of beam
crevice were calculated and analyzed. The results show that: (1) Two DYG200 jacks with lifting weight of
height can meet requirements of field construction;
收稿日期:2019 04 21 作者简介:郑汝亮(1975—) ,男,2001 年毕业于兰州铁道学院交通土建 工程( 铁道工程) 专业,工学学士,高级工程师。
(4) The construction technology of replacing bearing for existing railway bridge by jacking has obvious
heavy vehicle traffic in deep soft soil area, which would result in the longitudinal displacement over鄄limit
disease of the bridge bearing. Based on a super large bridge in DaLi Railway, the application research on