Continuous measurement and monitoring system for cantilever-method construction line font of linear bridge and monitoring method

Abstract

The invention discloses a continuous measurement and monitoring system for the construction line shape of a straight bridge cantilever method, which includes a reflection target, an installation column and a laser distance measuring device; the invention also discloses a continuous monitoring method using the above monitoring system. The positions of the first reflective target and the third reflective target; the second step is to use the first laser rangefinder to measure the actual offset of the second reflective target, and the third step is to use the actual position of the second reflective target as a reference Check the horizontality and rotation angle of a laser distance measuring device; then use the second laser distance measuring device to measure the actual offset of the first reflective target and the third reflective target; stop during the walking process of the hanging basket and when it is in place , continuously monitor the offset of the hanging basket through the above steps. The invention has simple structure, is convenient for measurement and can realize continuous monitoring during the walking process of the hanging basket, and is suitable for cantilevered construction of most linear bridges.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a monitoring system and a monitoring method in the cantilever construction of straight-line bridges. Background technique [0002] The main work contents of cantilever construction with hanging basket include: pouring the starting beam section (block 0#) on the top of the pier, assembling the hanging basket on the starting beam section and segmenting the hanging beam section in turn; closing the side span and middle span. The bottom of the 0# block is supported by the pier column, which is the pier column of the 0# block. [0003] When the cantilever pouring method is used for construction, the No. 0 block beam section at the top of the pier is cast in-situ by vertical formwork on the bracket. The construction bracket can be supported by the pier body, cap or the ground respectively according to the height of the pier body, the form of the cap and the terrain conditi...

AI Technical Summary

Problems solved by technology

[0007] Since the alignment monitoring of the hanging basket construction includes the elevation and coordinate measurement of multiple steps such as the installation and removal of the hanging basket, concrete pouring of the cantilever section, and prestressed tendon tensioning, the measurement frequency is high, the data volume is lar

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