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A platform for research: civil engineering, architecture and urbanism
Splicing construction method for large-span suspension bridge
The invention relates to the field of bridge construction, in particular to a large-span suspension bridge construction method. After construction of a main cable of the suspension bridge is completed, a catwalk is changed to be hoisted to the main cable, active counterweights are loaded on the changed catwalk, stress reaches an expected bridge forming state, main beam sections are sequentially erected from a side span to a midspan, the corresponding active counterweights are unloaded according to the equivalent replacement principle in the erecting process, and the internal force of the main cable is kept constant until closure is achieved. And in the main beam erecting stage, main cable wire winding and protection and cable clamp final tightening and fastening operation can be synchronously carried out, and parallel construction of multiple working faces is achieved. According to the method, active balance weight is used for equivalently replacing loads mainly including a main beam, a bridge deck and bridge deck pavement, the stress of the main cable is kept in an expected bridge forming state all the time, according to the rule, the main beam can be continuously erected in a rigid connection mode without a temporary hinge, main cable winding and protection and cable clamp final tightening and fastening operation can be synchronously conducted after the main beam is erected, and parallel construction of multiple working faces is achieved. The construction efficiency can be improved, the high-altitude operation risk is reduced, and the characteristics of quickness, high reliability and the like are achieved.
本发明涉及桥梁施工领域，具体地指一种大跨度悬索桥施工方法。悬索桥主缆施工完成后将猫道改吊到主缆上，并在改吊后的猫道上加载主动配重，使应力达到预期成桥状态，主梁节段依次从边跨向跨中架设，架设过程中遵循等量代替原则卸载相应主动配重，维持主缆内力恒定，直到合龙，主梁架设阶段可以同步进行主缆缠丝和防护、索夹终拧紧固作业，实现多作业面并行施工。本发明专利利用主动配重，等效代替主梁、桥面板、桥面铺装为主的荷载，让主缆应力一直维持预期成桥状态，依此规律主梁可连续刚接架设不设临时铰，主缆缠丝和防护、索夹终拧紧固作业可在主梁架设后同步进行，实现多作业面并行施工。使用本发明能提高施工效率，降低高空作业风险，具有快速化、可靠性高等特点。
Splicing construction method for large-span suspension bridge
The invention relates to the field of bridge construction, in particular to a large-span suspension bridge construction method. After construction of a main cable of the suspension bridge is completed, a catwalk is changed to be hoisted to the main cable, active counterweights are loaded on the changed catwalk, stress reaches an expected bridge forming state, main beam sections are sequentially erected from a side span to a midspan, the corresponding active counterweights are unloaded according to the equivalent replacement principle in the erecting process, and the internal force of the main cable is kept constant until closure is achieved. And in the main beam erecting stage, main cable wire winding and protection and cable clamp final tightening and fastening operation can be synchronously carried out, and parallel construction of multiple working faces is achieved. According to the method, active balance weight is used for equivalently replacing loads mainly including a main beam, a bridge deck and bridge deck pavement, the stress of the main cable is kept in an expected bridge forming state all the time, according to the rule, the main beam can be continuously erected in a rigid connection mode without a temporary hinge, main cable winding and protection and cable clamp final tightening and fastening operation can be synchronously conducted after the main beam is erected, and parallel construction of multiple working faces is achieved. The construction efficiency can be improved, the high-altitude operation risk is reduced, and the characteristics of quickness, high reliability and the like are achieved.
本发明涉及桥梁施工领域，具体地指一种大跨度悬索桥施工方法。悬索桥主缆施工完成后将猫道改吊到主缆上，并在改吊后的猫道上加载主动配重，使应力达到预期成桥状态，主梁节段依次从边跨向跨中架设，架设过程中遵循等量代替原则卸载相应主动配重，维持主缆内力恒定，直到合龙，主梁架设阶段可以同步进行主缆缠丝和防护、索夹终拧紧固作业，实现多作业面并行施工。本发明专利利用主动配重，等效代替主梁、桥面板、桥面铺装为主的荷载，让主缆应力一直维持预期成桥状态，依此规律主梁可连续刚接架设不设临时铰，主缆缠丝和防护、索夹终拧紧固作业可在主梁架设后同步进行，实现多作业面并行施工。使用本发明能提高施工效率，降低高空作业风险，具有快速化、可靠性高等特点。
Splicing construction method for large-span suspension bridge
一种大跨度悬索桥拼装施工方法
XU HONGSHENG (author) / HE RENKE (author) / ZHOU DAQING (author) / YAN DONGHUANG (author) / WU JIADONG (author) / WU ZUTAO (author) / QIN XINLIN (author) / YUE YACHAO (author) / SHI BOWEN (author)
2021-05-28
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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