The invention relates to a structure for improving the integrity of externally prestressed precast segmental beam bridge, belonging to the field of bridge engineering. The invention comprises a prefabricated segmental beam, a screw, a nut and a high strength steel plate. After splicing segmental beams with external prestressing tendons, high strength steel plates are attached to the bottom of adjacent segmental beams. At the same time, the high strength screw passes through the holes reserved near the joint of the segmental beams and the holes reserved by the external steel plates and tightens the nuts. The steel plates at the bottom of the prefabricated beams are fixed, and the epoxy mortar is poured around the screw. The high-strength screw can make the external steel plate and the segment beam form a more solid whole. The structure of the invention can improve the connection between adjacent segmental beams, delay the opening of joints, and improve the stiffness and bearing capacity of externally prestressed precast segmental beam bridges. Compared with the existing technology, this structure can greatly improve the integrity of externally prestressed precast segment beams and is convenient for construction.
【技术实现步骤摘要】
一种提高体外预应力预制节段梁桥整体性的构造
本专利技术涉及一种提高体外预应力预制节段梁桥整体性的构造,属于桥梁工程领域。
技术介绍
2016年以来,针对我国劳动力成本上涨,传统建筑业升级换代等问题,建设部、交通部已多次发文推广装配建筑,北京、上海、济南等地也纷纷出台地方标准支持装配建筑技术的推广应用。桥梁的预制拼装施工法是将梁体分成若干节段,在预制厂预制后运输至桥位进行组拼,这是中等跨径梁桥的一种施工方法。由于在工厂提前预制,对施工现场干扰小,施工速度比较快,梁体质量容易得到控制,对桥长超过2公里的桥梁和城市高架桥梁尤为适用。尽管预制节段梁具有这么多优点,但由于体外束预制节段混凝土桥梁在接缝处容易张开,导致预制节段梁桥的刚度较低,承载力较整体梁低,限制其进一步的推广应用。因此怎样提高预制节段梁桥的刚度和整体性一直是人们研究的重点。该技术瓶颈的突破将有利于该极具竞争力的桥型的推广应用,获得社会效益和经济效益。
技术实现思路
为了解决现有技术中的问题,本专利技术提供了一种提高体外预应力预制节段梁桥整体性的构造。本专利技术可以有效提高体外预应力预制节段梁桥的整体性和承载力。本专利技术的技术方案是:本专利技术的提高体外预应力预制节段梁桥整体性的构造,包括预制节段梁,用体外预应力筋5将节段梁1拼接后,在相邻节段梁1底部外贴高强钢板4,同时将高强螺杆2穿过节段梁1在接缝附近预留的孔道和钢板4,在螺杆2底部拧上螺母3将钢板4和节段梁1体形成一个整体。所述的螺杆2的截面形状为T字型,采用高强螺纹钢,并在螺杆2周围灌注环氧树脂砂浆6。环氧树脂砂浆6可以使得螺杆2和孔道壁连接紧密 ...
【技术保护点】
1.一种提高体外预应力预制节段梁桥整体性的构造,包括预制节段梁,其特征在于所述的节段梁制作时在接缝附近预留孔道,所述节段梁底部外贴钢板。
【技术特征摘要】
1.一种提高体外预应力预制节段梁桥整体性的构造,包括预制节段梁,其特征在于所述的节段梁制作时在接缝附近预留孔道,所述节段梁底部外贴钢板。2.根据权利要求1所述的一种提高体外预应力预制节段梁桥整体性的构造,其特征在于所述钢板通过环氧树脂粘贴在相邻节段梁底部,且在钢板外表面涂上环氧树脂。3.根据权利要求1所述的一种提高体外预应力预制节段梁桥整体性的构造,其特征在于:所述的钢板按照节段梁预留孔道位置在相应的位置预留孔洞。4.根据权利要...
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