Construction method of equipment base pre-reservation anchor bolt square hole

Abstract

The invention relates to a construction method of an equipment base pre-reservation square hole, in particular to a construction method of an equipment base pre-reservation anchor bolt square hole, which is characterized by comprising the following steps that, firstly, a die is assembled; secondly, the die is erected: the size of an upper hole of the die of the equipment base pre-reservation square hole, which can be repeatedly used, is regulated according to a drawing, a fourth locating nut is unscrewed, a second sliding regulation seat moves downwards so that the rectangular size of the upper hole of an angle template is reached, a second locating nut is unscrewed, a first sliding regulation seat moves downwards so that the rectangular size of a lower hole of the angle template is reached, the third locating nut and a first locating nut are screwed, and a plastic film or an adhesive tape wraps on the outer walls of the angle template and a middle template as a protective layer; thirdly, concrete is poured; fourthly, the template is disassembled, the angle template is extracted, a wood bottom plate is lifted out, and a square hole is left; and fifthly, the hole is cleaned, and the equipment base pre-reservation anchor bolt square hole is acquired. The construction method has the advantages that the operation is simple, die stripping is rapid, and the die can be repeatedly used.

Description

technical field [0001] The invention belongs to a construction method for reserved square holes (reserved square holes for anchor bolts) in equipment foundations. Background technique [0002] In the construction of the equipment foundation, the foundation bolt holes of the equipment need to be reserved on the concrete foundation. The reserved method generally adopts the methods of supporting steel bellows, plastic pipes or supporting wooden formwork, etc., and removes them in time after the concrete solidifies. The steel corrugated pipe adopts a tool with a slot at one end and a handle at the other end. The slot is clamped to the steel bellows, and the steel corrugated pipe is peeled off layer by layer. The removal effect is not satisfactory; the plastic pipe is baked at high temperature to make it soft, and then Pulling out as a whole, the method sometimes causes the plastic pipe to break off, which directly affects the strength of the secondary grouting of the anchor bolt...

AI Technical Summary

Problems solved by technology

The steel corrugated pipe adopts a tool with a slot at one end and a handle at the other end. The slot is clamped to the steel bellows, and the steel corrugated pipe is peeled off layer by layer. The removal effect is not satisfactory; the plastic pipe is baked at high temperature to make it soft, and then Pulling out as a whole, the method sometimes causes the plastic pipe to break off, which directly affects the strength of the secondary grouting of the anchor bolt holes; the wooden formwork adopts a square pyramid-shaped wooden box structure with a large upper opening and a smaller lower opening, with small cross-section and deep depth. For deep holes, there will be various difficulties such as difficulty in force and limited space when dismantling

In order to improve the pull-out bearing capacity of bolts, a structure with the lower opening slightly larger than the upper opening is often used. Steel bellows and plastic pipes are standard materials for pipe diameters, which cannot meet the requirements of large upper openings and smaller lower openings. The upper opening is smaller than the lower opening. The large pyramid-shaped wooden box cannot be dismantled even if it meets the size requirements

Namely: the anchor bolt hole is characterized by a long and narrow space with a large aspect ratio, so it brings great inconvenience to the demolition, and its formwork cannot be reused during the demolition process

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