Inner sleeve-type inclined guy cable main tower cable guide pipe and construction method thereof

Abstract

The invention relates to an inner sleeve-type guy cable main tower cable guide pipe and a construction method thereof. A pre-buried pipe pre-buried in a main tower is the same as the cable guide pipe in mounting angle, and is flush with the outer side of the main tower; a pre-buried plate at the inner end of the pre-buried pipe is flush with a concrete surface of an inclined stay cable anchor block; the outer end of the cable guide pipe is exposed out of the main tower; the inner end of the cable guide pipe is connected with an anchor padding plate; the anchor padding plate is welded with the pre-buried plate; and a gap is reserved between the cable guide pipe and the pre-buried pipe. The construction method comprises the following steps: pre-burying the pre-buried pipe in a main tower section required to be poured with concrete; jacking a main tower mold plate after the pouring of concrete; mounting the cable guide pipe in the pre-buried pipe in such a manner that the gap is reserved between the cable guide pipe and the pre-buried pipe; mounting a circular plug between the outer end of the pre-buried pipe and the cable guide pipe; and grouting from a grouting port, so that the mounting of the inner sleeve-type cable guide pipe is fulfilled. As no hole for the cable guide pipe is formed in the main tower mold plate, the service life of the mold plate can be prolonged, and time for opening and lofting of a lower die plate is saved; and as obstruction caused by the exposing of the cable guide pipe is avoided, the construction speed as well as the operating efficiency is high. The cable guide pipe and the construction method are suitable for concrete main towers of which inclined stay cable guide pipes are exposed out of main tower walls.

Description

technical field [0001] The invention relates to a novel inner casing main tower cable conduit and a construction method thereof. Can be used in cable-stayed bridges for roads and railways. The scope of application of the design is: steel strand stay cables and parallel steel wire stay cables. Background technique [0002] In recent decades, with the rapid development of my country's social economy, a large number of highway and railway cable-stayed bridges have been built. The main towers of these cable-stayed bridges basically adopt concrete structures. For the installation and anchoring of the stay cables, it is necessary to pre-embed the cable guides in the wall of the main tower. If the length of the cable guide is longer and protrudes from the outside of the tower wall, it is necessary to open a hole on the main tower formwork so that the cable guide can be exposed. Because the angle and position of the cable conduits are different, the size and position of the temp...

AI Technical Summary

Problems solved by technology

Repeated opening will inevitably shorten the service life of the formwork

At the same time, because the cable guide is exposed, it also hinders the lifting of the formwork

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