Positioning control method for discontinuous multi-beam concentric pre-buried pipelines

Abstract

The invention belongs to the technical field of bridge engineering, and relates to a positioning control method for discontinuous multi-beam concentric pre-buried pipelines. The method comprises the following steps of measuring a center point of a hole channel of an anchor end of an external cable, and measuring and installing the position of the pre-buried pipeline in an arch capping beam when structural steel of the arch capping beam is installed and before a template is installed; erecting a laser pointing instrument in a beam box chamber at one end of the hole channel in order to pass through the center positions of anchoring points of cross beams at two ends, wherein a projection position of a laser beam passing through each cross beam is a position of a to-be-installed pre-buried hole channel steel tube; manufacturing a circle center target for receiving a laser projection point at a laser beam position for installing the pre-buried pipeline of each capping beam; and after all preformed hole channel steel tubes of each anchor cable are adjusted and reach the standard after re-inspection, carrying out positioning welding and template positioning. According to the method, the disturbance to the pipeline position is avoided during fixation, the deviation and dislocation are avoided, the centering effect is rechecked when necessary, and then fine adjustment and welding fixation are carried out; and the method is simple in process, economical, applicable, safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and relates to a positioning control method for discontinuous multi-beam concentric pre-embedded pipelines. Background technique [0002] The positioning control method of the pre-buried channel of the arched cover beam is conventionally measured by measuring instruments or by drawing wires between the corresponding channels of the beams at both ends to assist in positioning. However, the positioning accuracy of the measuring instrument is not high due to factors such as measurement errors, dense structural steel bars and difficult operation. , The pre-buried tunnels are not concentric, etc., and there is interference of dense steel bars and the effect of the sagging of the guy wires between the corresponding tunnels of the beams at both ends. It is difficult to meet the positioning accuracy requirements of the embedded tunnels. [0003] Under such working conditions, how to ensure the ...

AI Technical Summary

Problems solved by technology

[0002] The positioning control method of the pre-buried channel of the arched cover beam is conventionally measured by measuring instruments or by drawing wires between the corresponding channels of the beams at both ends to assist in positioning. However, the positioning accuracy of the measuring instrument is not high due to factors such as measurement errors, dense structural steel bars and difficult operation. , pre-embedded channels are not concentric, etc., and there are dense reinforcement interference and cable sagging in the cable-assisted positioning between the corresponding channels of the beams at both ends, and it is difficult to meet the positioning accuracy requirements of the pre-embedded channels.