Stress Monitoring for Cantilever Construction of Concrete Continuous Bridge with Variable Cross-section

摘要

Due to the complex topography and strict requirement for the construction as well as the significant effect, from the stress and strain, on the geometric shape of such a continuous bridge with variable cross-section, it is difficult to control the geometric shape of the bridge without stress monitoring. Based on this bridge, this paper introduces the influence of stress on the construction of the concrete continuous bridge. Through the actual monitoring, the conclusions is drew that the changing speed of cantilever elevation is different under the influence of stress and the approximate law of compressive stress (few tensile stress) actually exists in the process of construction. These conclusions contribute to the designs of the bridge conforming to the requirements and accomplish the purpose of monitoring the construction.