A real-time elevation calculation method for the cpiii point of the track control network on the cable-stayed bridge

Abstract

The invention discloses a method for calculating the real-time elevation of the CPⅢ point of the upper track control network of a cable-stayed bridge, which comprises the following steps: Step 1: Obtain the elevation variation, atmospheric temperature and concrete temperature of the CPⅢ point on the main bridge of the steel-concrete composite bridge cable-stayed bridge ; Step 2: Establish the relationship between the elevation change and the CPⅢ point; Step 3: Establish the relationship between the environment-elevation change; Step 4: Obtain the combined model according to the relationship obtained in Step 2 and Step 3; Step 5: According to the step 4 The combined model obtained obtains the elevation variation of each CPⅢ point, and the real-time elevation value of the CPⅢ point can be obtained according to the elevation variation; The multi-valued problem of elevation.

Description

technical field

[0001] The invention relates to the field of high-speed railway bridge construction, in particular to a real-time elevation calculation method for CPⅢ points of a track control network on a cable-stayed bridge. Background technique

[0002] The long-span steel-concrete composite bridge cable-stayed bridge due to the influence of external environmental factors such as temperature, sunshine and load will lead to significant uneven transformation of the bridge structure, which will lead to the CPⅢ control point arranged on the middle span of the cable-stayed bridge. produce varying degrees of vertical displacement. Due to the multi-valued elevation of CPⅢ point, the construction of ballastless track slab laying and track fine adjustment on long-span cable-stayed bridges cannot be carried out. In order to ensure the successful laying of ballastless track on the bridge, it is necessary to grasp the vertical displacement and deformation law of the main girder of t...

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