Method for observing support cast-in-place beam preloading by utilizing reflector

Abstract

The invention relates to a method for observing support cast-in-place beam preloading by utilizing a reflector. The method mainly comprises the steps of fixing the reflector at the position to be observed, inputting an elevation in a measuring instrument, observing and recording coordinates and elevations of the reflector before and after preloading, and calculating the displacement of a support structure according to changes of coordinates and elevations of the reflector before and after preloading. The method has the advantages that settlement observation of support preloading in the large-span high cast-in-place beam construction is achieved; settlement is observed accurately on the premise that constructors are not required to enter preloading fields; the safety of constructors is guaranteed; the measurement is convenient, stationing is easy, places where prisms cannot arrive easily can be observed freely, and the high-altitude operation risks of measuring staff are reduced.

Description

technical field [0001] The invention relates to the technical field of bridge erection, in particular to a method for preloading and observing cast-in-place beams with brackets using reflective sheets. Background technique [0002] In recent years, the construction and opening of a number of passenger dedicated lines in China has brought great impetus to the development of the national economy, effectively promoted the growth of the national economy and social progress, and greatly promoted the economic development along the line. Ballastless track technology has been fully developed across the country. In the construction of large-span and high-height cast-in-place beams, in order to ensure construction safety, the preloading test of the support system is carried out, and the overload preloading of the support is carried out. The purpose of preloading is to eliminate the inelastic deformation of the support and the foundation. Measure the elastic deformation value of the s...

AI Technical Summary

Problems solved by technology

One of the tasks that must be done in routine survey work is orientation, which requires the ruler to go to the backsight point to set up a prism or set up a sign; it may often be difficult to set up a prism in many places during work. In recent years, railway bridge erection In China, bridges up to tens of meters abound. Such bridges are either difficult to reach, or require a lot of time and effort to erect the prism.

To monitor beam deformation, it is necessary to regularly go to the deformation point to erect prisms, and this process often takes a period of time

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