大跨宽幅波形钢腹板PC箱梁桥施工关键技术研究
|
摘要
随着我国波形钢腹板PC组合箱梁桥跨度不断增大,大跨宽幅波形钢腹板pc箱梁桥施工中波形钢腹板吊装定位、内衬及底板质量控制、横隔板临时支撑等关键技术问题亟需进一步完善。本文结合港珠澳大桥珠海连接线工程前山河特大桥施工,介绍了首块波形钢腹板吊装及支撑固定技术;提出了适用于跨河长悬臂波形钢腹板施工的新型拖吊结合式挂篮结构;讨论了内衬混凝土及底板施工质量控制措施,并提出内衬混凝土"内撑外拉"式模板结构及底板降温、挂篮底板后吊点布置方案;指出了横隔板部位临时替代支撑的必要性,为大跨宽幅波形钢腹板PC箱梁桥施工技术推广应用提供参考和借鉴。
With the span of PC box girder bridge with corrugated steel webs becoming longer and longer in our country, the key construction techniques of long-span and broad-width PC box girder bridge with corrugated steel webs, such as the hoisting and positioning of corrugated steel webs, construction quality control of concrete lining in corrugated steel webs and bottom slab, temporary support of diaphragm plate, need to be further improved urgently. In this paper, combined with the construction of Qianshan River Super-large Bridge in Zhuhai connecting line engineering of Hong Kong-Zhuhai-Macao Bridge, the hoisting and positioning technology of the first corrugated steel web was introduced. The new type of hanging basket for carrying and hoisting corrugated steel webs, which was applied in cross-river and long-cantilever construction,was presented. The quality control measures of concrete lining in corrugated steel webs and bottom slab had been discussed, meanwhile, the schemes of "internal supporting and external tensioning" formwork structure of concrete lining in corrugated steel webs and concrete cooling as well as hanging basket back lifting point layout had been also presented.The necessity of the temporary replacement support at the diaphragm plate had been pointed out. All the effective measures could be used as an important reference for promotion and application on construction techniques of long-span and broadwidth PC box girder bridge with corrugated steel webs.
With the span of PC box girder bridge with corrugated steel webs becoming longer and longer in our country, the key construction techniques of long-span and broad-width PC box girder bridge with corrugated steel webs, such as the hoisting and positioning of corrugated steel webs, construction quality control of concrete lining in corrugated steel webs and bottom slab, temporary support of diaphragm plate, need to be further improved urgently. In this paper, combined with the construction of Qianshan River Super-large Bridge in Zhuhai connecting line engineering of Hong Kong-Zhuhai-Macao Bridge, the hoisting and positioning technology of the first corrugated steel web was introduced. The new type of hanging basket for carrying and hoisting corrugated steel webs, which was applied in cross-river and long-cantilever construction,was presented. The quality control measures of concrete lining in corrugated steel webs and bottom slab had been discussed, meanwhile, the schemes of "internal supporting and external tensioning" formwork structure of concrete lining in corrugated steel webs and concrete cooling as well as hanging basket back lifting point layout had been also presented.The necessity of the temporary replacement support at the diaphragm plate had been pointed out. All the effective measures could be used as an important reference for promotion and application on construction techniques of long-span and broadwidth PC box girder bridge with corrugated steel webs.
引文
[1]#12
[2]#12
[3]郑尚敏,向苇康,杨丙文,等.波形钢腹板在施工中空间位置的定位研究[J].桥梁建设,2012, 42(4):113-117.
[4]张秋祥.黄河大桥大跨波形钢腹板PC连续梁桥合龙施工技术[J].铁道建筑技术,2014(5):10-13.
[5]王达,黄海珊,曹政,等.波形钢腹板PC组合箱梁桥新型异步施工受力性能研究[J].公路交通科技,2016, 33(8):58-64.
[6]曾田胜,徐郁峰,卢绍鸿.波形钢腹板弯箱梁桥设计、施工与监控[J].中外公路,2014, 34(3):170-174.
[7]杨勃,陈艳茹,李刚,等.大跨度波形钢腹板梁桥施工线形分析研究[J].公路工程,2016, 41(4):159-165.
[8]李华萍,华剑平,石伟,等.波形钢腹板体外预应力箱梁的工程应用[J].预应力技术,2014, 103(2):24-27.
[9]魏俊龙.波形钢腹板体外预应力箱梁在新密溱水路大桥中的应用[J].铁道建筑技术,2014(S1):103-106.
[10]马磊,万水,蒋正文.单箱双室波形钢腹板箱梁扭转与畸变性能研究[J].中国公路学报,2016, 29(10):77-85.
[11]贾贯乾.波形钢腹板箱梁无背索斜拉桥斜塔施工技术[J].铁道建筑技术,2015(2):18-20.
[12]刘明才,胡仲春,谷守法,等.波形钢腹板特大桥体外预应力设计及应用研究[J].世界桥梁,2017, 45(1):45-50.
[2]#12
[3]郑尚敏,向苇康,杨丙文,等.波形钢腹板在施工中空间位置的定位研究[J].桥梁建设,2012, 42(4):113-117.
[4]张秋祥.黄河大桥大跨波形钢腹板PC连续梁桥合龙施工技术[J].铁道建筑技术,2014(5):10-13.
[5]王达,黄海珊,曹政,等.波形钢腹板PC组合箱梁桥新型异步施工受力性能研究[J].公路交通科技,2016, 33(8):58-64.
[6]曾田胜,徐郁峰,卢绍鸿.波形钢腹板弯箱梁桥设计、施工与监控[J].中外公路,2014, 34(3):170-174.
[7]杨勃,陈艳茹,李刚,等.大跨度波形钢腹板梁桥施工线形分析研究[J].公路工程,2016, 41(4):159-165.
[8]李华萍,华剑平,石伟,等.波形钢腹板体外预应力箱梁的工程应用[J].预应力技术,2014, 103(2):24-27.
[9]魏俊龙.波形钢腹板体外预应力箱梁在新密溱水路大桥中的应用[J].铁道建筑技术,2014(S1):103-106.
[10]马磊,万水,蒋正文.单箱双室波形钢腹板箱梁扭转与畸变性能研究[J].中国公路学报,2016, 29(10):77-85.
[11]贾贯乾.波形钢腹板箱梁无背索斜拉桥斜塔施工技术[J].铁道建筑技术,2015(2):18-20.
[12]刘明才,胡仲春,谷守法,等.波形钢腹板特大桥体外预应力设计及应用研究[J].世界桥梁,2017, 45(1):45-50.