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Construction method for applying prestress to bridge deck in hogging moment area of reinforced concrete composite bridge
The invention discloses a construction method for applying prestress to a bridge deck in a hogging moment area of a reinforced concrete composite bridge and relates to the technical field of bridge engineering. The construction method comprises the steps that a steel beam and a plurality of prefabricated concrete bridge decks are obtained; the prefabricated concrete bridge deck slabs are hoisted to the steel beam, and a splicing seam is formed between every two adjacent prefabricated concrete bridge deck slabs, the precast concrete bridge deck slab at the single side of the hogging moment areais connected with the precast concrete bridge deck slab in the hogging moment area, and the precast concrete bridge deck slab in the hogging moment area is fixed to the steel beam; a jack is installed in the first splicing seam at the junction of the other side of a sagging moment area and the other side of the hogging moment area, pre-pressure is applied to one side of the hogging moment area, asteel wedge is installed to maintain the pre-pressure unchanged, the jack is removed, and the precast concrete bridge deck slab connected with the hogging moment area at the side is connected with the precast concrete bridge deck slab in the sagging moment area and the steel beam. The construction period is effectively shortened, the problem of prestress friction loss caused by a bridge deck post-tensioning method can be avoided, and high use value and good economic benefits are achieved.
一种钢混组合桥梁负弯矩区桥面板施加预应力的施工方法，涉及桥梁工程技术领域。施工方法包括获得钢梁及多个预制混凝土桥面板；将预制混凝土桥面板吊装于钢梁且相邻的两个预制混凝土桥面板之间形成拼接缝，将负弯矩区单侧的预制混凝土桥面板与正弯矩区预制混凝土桥面板连接且将正弯矩区预制混凝土桥面板固定于钢梁，将千斤顶安装于正弯矩区与负弯矩区另一侧交界处的第一拼接缝中并向负弯矩区单侧施加预压力并安装钢楔以维持预压力不变，去除千斤顶并连接该侧的负弯矩区的预制混凝土桥面板与正负弯矩区预制混凝土桥面板、钢梁分别连接；其有效缩短工期，能够规避桥面板后张法预应力摩擦损失问题，具有较大的使用价值和良好的经济效益。
Construction method for applying prestress to bridge deck in hogging moment area of reinforced concrete composite bridge
The invention discloses a construction method for applying prestress to a bridge deck in a hogging moment area of a reinforced concrete composite bridge and relates to the technical field of bridge engineering. The construction method comprises the steps that a steel beam and a plurality of prefabricated concrete bridge decks are obtained; the prefabricated concrete bridge deck slabs are hoisted to the steel beam, and a splicing seam is formed between every two adjacent prefabricated concrete bridge deck slabs, the precast concrete bridge deck slab at the single side of the hogging moment areais connected with the precast concrete bridge deck slab in the hogging moment area, and the precast concrete bridge deck slab in the hogging moment area is fixed to the steel beam; a jack is installed in the first splicing seam at the junction of the other side of a sagging moment area and the other side of the hogging moment area, pre-pressure is applied to one side of the hogging moment area, asteel wedge is installed to maintain the pre-pressure unchanged, the jack is removed, and the precast concrete bridge deck slab connected with the hogging moment area at the side is connected with the precast concrete bridge deck slab in the sagging moment area and the steel beam. The construction period is effectively shortened, the problem of prestress friction loss caused by a bridge deck post-tensioning method can be avoided, and high use value and good economic benefits are achieved.
一种钢混组合桥梁负弯矩区桥面板施加预应力的施工方法，涉及桥梁工程技术领域。施工方法包括获得钢梁及多个预制混凝土桥面板；将预制混凝土桥面板吊装于钢梁且相邻的两个预制混凝土桥面板之间形成拼接缝，将负弯矩区单侧的预制混凝土桥面板与正弯矩区预制混凝土桥面板连接且将正弯矩区预制混凝土桥面板固定于钢梁，将千斤顶安装于正弯矩区与负弯矩区另一侧交界处的第一拼接缝中并向负弯矩区单侧施加预压力并安装钢楔以维持预压力不变，去除千斤顶并连接该侧的负弯矩区的预制混凝土桥面板与正负弯矩区预制混凝土桥面板、钢梁分别连接；其有效缩短工期，能够规避桥面板后张法预应力摩擦损失问题，具有较大的使用价值和良好的经济效益。
Construction method for applying prestress to bridge deck in hogging moment area of reinforced concrete composite bridge
钢混组合桥梁负弯矩区桥面板施加预应力的施工方法
WANG CHANGJIANG (author) / DUAN YAJUN (author) / AN FENGMING (author) / MA QINGANG (author) / CHEN DUO (author) / DONG JIALIN (author) / LIN GUANGYI (author) / ZHANG XIANQING (author)
2020-07-28
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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