Assembly type control point vertical projection measurement hole fixing device

Abstract

The invention discloses an assembly type control point vertical projection measurement hole fixing device. The assembly type control point vertical projection measurement hole fixing device comprises a cover plate, wherein a projection measurement hole penetrates through the end face, facing a hole, of the cover plate; a plurality of through holes penetrate through the plane of the cover plate; the extending direction of the through holes is consistent with that of the projection measurement hole; screws are inserted into the through holes; the ends, away from the cover plate, of the screws are integrally connected with bent rods; the screws and the bent rods integrally form L-shaped foundation bolts; the ends, located at the cover plate and away from the bent rods, of the screws are in threaded connection with hand-screwed nuts; the hand-screwed nuts are butterfly nuts; the end face, close to the bent rods, of the cover plate is fixedly connected with a limiting plate; a working hole right opposite to the projection measurement hole penetrates through the limiting plate; and the cover plate covers the limiting plate. By the adoption of the arrangement, on the premise that a protection device of the hole does not need to be moved away, the potential safety hazards such as missing of steps or falling of large objects are reduced, the effect of projection and paying-off of a control point can be achieved, and the beneficial effect that the hole protection device is recycled is achieved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an assembly-type control point vertical projection hole fixing device. Background technique [0002] In the construction of high-rise buildings, there will be a kind of opening called defense hole, which exists to guide the coordinate points of the lower layer or the bottom layer to the upper layer, so that the control point of this layer is the same as that of the lower layer, which is convenient for the structural layout of internal cavities, doors and windows, etc. of unity. In multi-storey buildings with a low number of floors, the method of reserving setting-out holes is seldom used to control the control points. Usually, the center line of the outer wall is used to guide the points. For high-rise buildings, because the height of the building often reaches 50 meters or even higher, the method of using the wire cone hanging method will lead to the accumulation ...

AI Technical Summary

Problems solved by technology

[0004] When setting out the line on the top floor, the control point on the first floor is projected upwards. It is necessary to pry or remove the formwork of the line opening of all floors before projecting it up. Restoration, very tedious and work-intensive

In addition, the protective formwork at the opening is often shifted due to reasons such as prying or moving it away without permission by workers, which leads to safety hazards such as falling debris and people stepping on the air.

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