A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method for demolition system of inclined-legged rigid frame overpass bridge for highway reconstruction and extension
The invention relates to a construction method of a demolition system of a slant-legged rigid frame overpass bridge for reconstruction and extension of a road. The construction method comprises the following steps: demolition operation is performed on a concrete guardrail; setting up a shaped assembly bracket at the midspan and the 1/4 span on one side; cutting and separating the upper end and the lower end of the inclined leg, and transporting away from the construction site through the inclined leg temporary fixing protection bracket; and the main beam segments are hoisted away in a segmented mode through the segment hoisting auxiliary bracket. The movable protection platform has the beneficial effects that the movable protection platform is arranged below the main beam of the inclined-leg rigid frame bridge, so that the safety under the bridge during the cutting period of a concrete guardrail and the main beam is effectively ensured, and the influence of construction activities on the existing traffic is reduced; when the main beam is cut, a shaped assembly support is adopted for temporary supporting and fixing, modular unit design is adopted for the support, the adjacent units are connected and fixed through connecting profile steel, and the field erecting efficiency and the engineering applicability are improved.
本发明涉及一种公路改扩建斜腿刚构跨线桥拆除体系的施工方法，包括以下步骤：对混凝土护栏进行拆除作业；在跨中和一侧1/4跨处搭设定型化拼装支架；将斜腿的上下端切割分离，通过斜腿临时固定防护支架运离施工现场；通过节段吊装辅助托架将主梁节段分段吊离。本发明的有益效果是：斜腿刚构桥主梁下方设置移动防护平台，有效地保证了混凝土护栏及主梁切割期间桥下的安全，降低了施工活动对既有交通的影响；主梁切割时，采用定型化拼装支架进行临时支撑固定，支架采用模块化单元设计，相邻单元之间通过联结型钢联结固定，提升了现场搭设效率及工程适用性。
Construction method for demolition system of inclined-legged rigid frame overpass bridge for highway reconstruction and extension
The invention relates to a construction method of a demolition system of a slant-legged rigid frame overpass bridge for reconstruction and extension of a road. The construction method comprises the following steps: demolition operation is performed on a concrete guardrail; setting up a shaped assembly bracket at the midspan and the 1/4 span on one side; cutting and separating the upper end and the lower end of the inclined leg, and transporting away from the construction site through the inclined leg temporary fixing protection bracket; and the main beam segments are hoisted away in a segmented mode through the segment hoisting auxiliary bracket. The movable protection platform has the beneficial effects that the movable protection platform is arranged below the main beam of the inclined-leg rigid frame bridge, so that the safety under the bridge during the cutting period of a concrete guardrail and the main beam is effectively ensured, and the influence of construction activities on the existing traffic is reduced; when the main beam is cut, a shaped assembly support is adopted for temporary supporting and fixing, modular unit design is adopted for the support, the adjacent units are connected and fixed through connecting profile steel, and the field erecting efficiency and the engineering applicability are improved.
本发明涉及一种公路改扩建斜腿刚构跨线桥拆除体系的施工方法，包括以下步骤：对混凝土护栏进行拆除作业；在跨中和一侧1/4跨处搭设定型化拼装支架；将斜腿的上下端切割分离，通过斜腿临时固定防护支架运离施工现场；通过节段吊装辅助托架将主梁节段分段吊离。本发明的有益效果是：斜腿刚构桥主梁下方设置移动防护平台，有效地保证了混凝土护栏及主梁切割期间桥下的安全，降低了施工活动对既有交通的影响；主梁切割时，采用定型化拼装支架进行临时支撑固定，支架采用模块化单元设计，相邻单元之间通过联结型钢联结固定，提升了现场搭设效率及工程适用性。
Construction method for demolition system of inclined-legged rigid frame overpass bridge for highway reconstruction and extension
公路改扩建斜腿刚构跨线桥拆除体系的施工方法
ZHANG WEI (author) / LUO ZHICHUN (author) / HU XIAN (author) / GONG RUN (author)
2024-04-16
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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