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A platform for research: civil engineering, architecture and urbanism
Large-span bridge closure section double-locking structure and construction method
The invention discloses a large-span bridge closure section double-locking structure and a construction method. The large-span bridge closure section double-locking structure comprises a hanging basket system for a hanging bracket method, wherein the hanging basket system for a hanging bracket method adopts a single-cantilever structure hanging basket system, a rigid framework supporting structure and a closure section pre-stressed steel beam structure; the rigid framework supporting structure serves as a first locking structure, the closure section pre-stressed steel beam structure serves as a second locking structure, the closure section pre-stressed steel beam structure is used for pre-tensioning a top plate, and the pre-tensioning force of the closure section pre-stressed steel beam structure is 20% of the designed tensioning force. According to the structure and the construction method, the disturbance of a closure section construction beam body is small, and the position and the weight of a balance weight are determined through theoretical calculation on the premise of no disturbance during concrete pouring by utilizing an equal displacement balance weight method; the safety of a closed bridge is improved, the midspan sagging moment is effectively reduced through reasonable balance weight, certain lower edge pressure stress can be stored, the internal force of a bridge structure is optimized, and safe use of a bridge is ensured.
本发明公开了一种大跨径桥梁合龙段双重锁定结构及施工方法，包括吊架法用挂篮体系，所述吊架法用挂篮体系采用单悬臂结构挂篮体系、刚性骨架支撑结构、以及合龙段预应力钢束结构；所述刚性骨架支撑结构作为第一锁定结构，所述合龙段预应力钢束结构作为第二锁定结构，且所述合龙段预应力钢束结构用以顶板预张拉，且所述合龙段预应力钢束结构的预张拉力为20％设计张拉力。本发明的结构和施工方法合龙段施工梁体扰动小，利用等位移配重法，以浇筑混凝土时不扰动为前提，通过理论计算去确定配重的位置和配重大小；提高合龙后桥梁安全性，通过合理配重有效减小跨中正弯矩，且能够储备一定的下缘压应力，优化桥梁结构内力，确保桥梁安全使用。
Large-span bridge closure section double-locking structure and construction method
The invention discloses a large-span bridge closure section double-locking structure and a construction method. The large-span bridge closure section double-locking structure comprises a hanging basket system for a hanging bracket method, wherein the hanging basket system for a hanging bracket method adopts a single-cantilever structure hanging basket system, a rigid framework supporting structure and a closure section pre-stressed steel beam structure; the rigid framework supporting structure serves as a first locking structure, the closure section pre-stressed steel beam structure serves as a second locking structure, the closure section pre-stressed steel beam structure is used for pre-tensioning a top plate, and the pre-tensioning force of the closure section pre-stressed steel beam structure is 20% of the designed tensioning force. According to the structure and the construction method, the disturbance of a closure section construction beam body is small, and the position and the weight of a balance weight are determined through theoretical calculation on the premise of no disturbance during concrete pouring by utilizing an equal displacement balance weight method; the safety of a closed bridge is improved, the midspan sagging moment is effectively reduced through reasonable balance weight, certain lower edge pressure stress can be stored, the internal force of a bridge structure is optimized, and safe use of a bridge is ensured.
本发明公开了一种大跨径桥梁合龙段双重锁定结构及施工方法，包括吊架法用挂篮体系，所述吊架法用挂篮体系采用单悬臂结构挂篮体系、刚性骨架支撑结构、以及合龙段预应力钢束结构；所述刚性骨架支撑结构作为第一锁定结构，所述合龙段预应力钢束结构作为第二锁定结构，且所述合龙段预应力钢束结构用以顶板预张拉，且所述合龙段预应力钢束结构的预张拉力为20％设计张拉力。本发明的结构和施工方法合龙段施工梁体扰动小，利用等位移配重法，以浇筑混凝土时不扰动为前提，通过理论计算去确定配重的位置和配重大小；提高合龙后桥梁安全性，通过合理配重有效减小跨中正弯矩，且能够储备一定的下缘压应力，优化桥梁结构内力，确保桥梁安全使用。
Large-span bridge closure section double-locking structure and construction method
一种大跨径桥梁合龙段双重锁定结构及施工方法
CHEN LIGUANG (author) / DONG SHI (author) / YU YILIN (author) / JIANG YONG (author) / LI XIN (author) / LI TONG (author) / MA HENGCHONG (author) / WANG QIQIAN (author) / LI YESHENG (author) / LEI MING (author)
2021-10-12
Patent
Electronic Resource
Chinese
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