基于挠度及有效预应力分析的高墩大跨度桥梁施工测量技术研究  

Construction Measurement Technology of High-pier and Long-span Bridge Based on Deflection and Effective Prestress Analysis

作　　者：龚颖男 Gong Yingnan(Beijing Municipal Road and Bridge Management and Maintenance Group Co.,Ltd. No. 4 Highway Engineering Office,Beijing 101500,China)

机构地区：[1]北京市政路桥管理养护集团有限公司第四公路工程处,北京101500

出　　处：《城市勘测》2020年第3期170-172,共3页Urban Geotechnical Investigation & Surveying

摘　　要：在高墩大跨度桥梁建设过程中,挠度和有效预应力是反映其质量和性能的重要指标,因此无论在施工阶段还是使用阶段,都必须要注重对其挠度和有效预应力的监测,尤其是在施工阶段,通过对挠度和有效预应力进行合理地测量,可以有效地指导施工活动的开展。本文从高墩大跨度桥梁预应力损失与挠度的相互作用机理分析出发,以某工程高墩大跨度桥梁为例,探讨了高墩大跨度桥梁施工测量技术问题。Most bridges in China adopt prestressed structures.For prestressed bridges,prestress loss is an important factor that affects the stiffness,strength,and shape of the bridge.At the same time,deflection is an important characteristic of performance,and it is also very important for the normal use of bridges.For high-pier and long-span bridges,deflection and effective prestress are important indicators reflecting their quality and performance.Therefore,no matter in the construction phase or in the use phase,attention must be paid to monitoring their deflection and effective prestress,especially in during the construction phase,through reasonable measurement of deflection and effective prestress,construction activities can be effectively guided.Therefore,in the research of this paper,based on the deflection and effective prestress,the construction measurement technology of high-pier long-span bridges is researched accordingly,and the key points of construction measurement technology of high-pier long-span bridges are put forward based on actual engineering cases.

关 键 词：高墩大跨度桥梁 挠度 有效预应力 施工测量技术 

分 类 号：P258[天文地球—测绘科学与技术]