Plate type switch bed plate bolt hole construction site drilling method

Abstract

The invention relates to a plate type switch bed plate bolt hole construction site drilling method. A switch is arranged on a support plate that is provided with a boss accurately matched with the bolt hole on the switch plate; the switch is accurately adjusted to a final position and capped with a cover plate, the cover plate and the support plate are positioned by a taper pin in between or in other ways, and the taper pin and other positioning ways aim at ensuring the coaxiality of the boss on the support plate and a drill bushing hole on the cover plate; the support plate and the cover plate are connected firmly by a bolt to guarantee the fixed opposite positions between the cover plate and the support plate; a drill bushing is used to drill the switch bed plate so that a hole of the switch bed plate and a bolt cased hole of the switch plate are centered; and after drilling the hole of the switch bed plate, uniform track lifting is conducted, the support plate is withdrawn, then track lowering is conducted, a switch tie bolt is connected and the switch is finally adjusted.

Description

technical field [0001] The invention relates to a construction site drilling method for bolt holes on a backing plate of a slab turnout, and belongs to the field of drilling method manufacturing on a construction site for bolt holes in a backing plate of a slab turnout. Background technique [0002] Existing slab turnouts refer to turnouts whose subrail foundation is prefabricated concrete turnout slabs. The size of prefabricated concrete turnout slabs generally ranges from (3000 to 5000) mm×(3000 to 5100) mm×200 mm. The iron parts of the turnout and the elastic elements are installed on the turnout plate through the bolts of the turnout, and the turnout plate is required to have bolt holes for connecting the iron parts of the turnout. Compared with the sleeper embedded ballastless track, the stability, smoothness and reliability of the turnout foundation of the slab turnout are significantly improved, and it has gradually become the mainstream of the development of ballastl...

AI Technical Summary

Problems solved by technology

But there are three problems in drilling on the concrete turnout plate: the one, the on-site drilling accuracy is difficult to guarantee; High equipment wear and tear, high engineering cost

In order to solve the above-mentioned problems, our country cancels the drilling scheme on the turnout slab, and adopts the scheme of pre-embedding the turnout bolt casing on the turnout slab when the concrete turnout slab is prefabricated. This scheme avoids the on-site drilling problem of the turnout slab, but The problem of centering between the bolt casing of the switch sleeper embedded on the turnout plate and the center of the bolt hole on the iron backing plate of the turnout occurred

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