激光隧道断面仪在实腹式钢筋混凝土拱桥检测中的应用

激光隧道断面仪在隧道施工和检测中发挥了重要的作用,一般用于隧道施工过程开挖断面检测、工程限界验收检测以及隧道形变检测等.结合袁毛线中修工程中某座实腹式钢筋混凝土拱桥检测实例,阐述激光断面检测仪检测原理,检测过程与数据处理,并对数据进行分析评价.结果表明,激光隧道断面仪应用于拱桥断面检测,准确地求解出拱圈的净矢高、净跨径和内弧线偏差等指标,较之前的全站仪、水准仪量测更为方便、可靠,并且已经收到了较好的效果.该方法可为类似实腹式拱桥拱圈断面的量测提供一个全新的思路,为以后检测工作提供更为准确和可靠的评价指标.

Application of Laser Tunnel Profiler in Detecting Solid-Web Reinforced Concrete Arch Bridge

Laser tunnel profiler has played an important role in tunnel construction and detection, is gen- erally used in the detection of tunnel excavation section, engineering limit acceptance and tunnel deflec- tion. Based on the detection of a solid-web reinforced concrete arch bridge in medium repairing engineer- ing of Yuanmao Highway, this paper elaborates the detecting principles, detecting progress and data pro- cess of laser profiler, and makes data analysis and assessment. The result shows that the laser tunnel pro- filer, when being used in arch bridge section detection, is able to get the exact solution of the indexes of the arch ring as net vector height, net span and inner arch line deviation and is more convenient and reli- able than the measurement of total station instrument and balance level with good performance. This meth- od can provide a completely new thinking for similar solid-web arch bridge measurement with more exact and reliable assessment indexes for the future detecting work.