A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction control method for camber on post-tensioned prestressed beam slab
The invention discloses a post-tensioned pre-stressed beam slab camber construction control method which comprises the following steps: S1, selecting a first piece or a first batch of beam slabs to be subjected to post-tensioned pre-stress to perform a pre-stressed steel beam tension test, and calculating a camber adjustment coefficient D of the beam slabs according to test data; s2, based on the upper camber adjustment coefficient D of the beam plate, calculating the concrete standard strength Q of the beam plate under the tensioning of the prestressed steel beam; and S3, according to the difference value between the designed upper camber of the beam plate and the actually measured upper camber within 48 hours after the prestressed steel beam is tensioned, the actually measured concrete strength of the beam plate during tensioning of the prestressed steel beam is adjusted, so that the upper camber of the beam plate subjected to post-tensioning prestress reaches the standard. The method has the advantages that effective control over the camber of the beam slab can be achieved, and the method is a technical guarantee measure for preventing and eliminating potential major quality and potential safety hazards of bridge structures and components.
本发明公开了一种后张预应力梁板上拱度施工控制方法，包括以下步骤：S1：选择待后张预应力的梁板中的首件或首批进行预应力钢束张拉试验，根据试验数据以计算所述梁板的上拱度调整系数D；S2：基于所述梁板的上拱度调整系数D，计算所述梁板在预应力钢束张拉下的混凝土标准强度Q；S3：根据所述梁板的设计上拱度与预应力钢束张拉结束后48小时内的实测上拱度之间的差值，来调整预应力钢束张拉时的所述梁板的实测混凝土强度，以使后张预应力的所述梁板的上拱度达标。本发明的优点是：可实现对梁板上拱度的有效控制，是防止与消除桥梁结构和构件潜在的重大质量和安全隐患的技术保证措施。
Construction control method for camber on post-tensioned prestressed beam slab
The invention discloses a post-tensioned pre-stressed beam slab camber construction control method which comprises the following steps: S1, selecting a first piece or a first batch of beam slabs to be subjected to post-tensioned pre-stress to perform a pre-stressed steel beam tension test, and calculating a camber adjustment coefficient D of the beam slabs according to test data; s2, based on the upper camber adjustment coefficient D of the beam plate, calculating the concrete standard strength Q of the beam plate under the tensioning of the prestressed steel beam; and S3, according to the difference value between the designed upper camber of the beam plate and the actually measured upper camber within 48 hours after the prestressed steel beam is tensioned, the actually measured concrete strength of the beam plate during tensioning of the prestressed steel beam is adjusted, so that the upper camber of the beam plate subjected to post-tensioning prestress reaches the standard. The method has the advantages that effective control over the camber of the beam slab can be achieved, and the method is a technical guarantee measure for preventing and eliminating potential major quality and potential safety hazards of bridge structures and components.
本发明公开了一种后张预应力梁板上拱度施工控制方法，包括以下步骤：S1：选择待后张预应力的梁板中的首件或首批进行预应力钢束张拉试验，根据试验数据以计算所述梁板的上拱度调整系数D；S2：基于所述梁板的上拱度调整系数D，计算所述梁板在预应力钢束张拉下的混凝土标准强度Q；S3：根据所述梁板的设计上拱度与预应力钢束张拉结束后48小时内的实测上拱度之间的差值，来调整预应力钢束张拉时的所述梁板的实测混凝土强度，以使后张预应力的所述梁板的上拱度达标。本发明的优点是：可实现对梁板上拱度的有效控制，是防止与消除桥梁结构和构件潜在的重大质量和安全隐患的技术保证措施。
Construction control method for camber on post-tensioned prestressed beam slab
后张预应力梁板上拱度施工控制方法
WANG XINLI (author) / WANG TONGCAI (author) / LI SHAOHUA (author) / LI SHENGRONG (author) / XIA GUANBAO (author) / XIA SHU (author) / YAO TIEJUN (author)
2023-12-05
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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