Construction method of equipment foundation reserved square hole

Abstract

The invention belongs to a construction method of an equipment foundation reserved square hole. The construction method of the equipment foundation reserved square hole is characterized by comprising the following steps: first step, assembling a die; second step, erecting the die: adjusting the dimensions of an upper opening of the reusable die of the equipment foundation reserved square hole, unscrewing a fourth positioning nut, moving a second sliding adjustment seat downwards to reach the rectangular dimensions of a corner die plate upper opening, unscrewing a second positioning nut, moving a first sliding adjustment seat downwards to reach the rectangular dimensions of an corner die plate lower opening, then screwing a third positioning nut and a first positioning nut, and taking a plastic film or a binding tape as a protective layer of the die plate to wrap up on the outside walls of the corner die plate and a middle die plate; third step, pouring concrete; fourth step, removing the die plates, extracting the corner die plate and leaving a square hole opening; and fifth step, cleaning the hole opening to obtain the equipment foundation reserved square hole. The method is simple to operate and is fast in die removal, and the die can be reused.

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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