Construction method of large equipment foundation reserved foundation bolt hole

Abstract

The invention relates to a construction method of a large equipment foundation reserved foundation bolt hole. The construction method of the large equipment foundation reserved foundation bolt hole is characterized by comprising the following steps: first step, assembling a die, wherein the die comprises a central shaft, two to four opening and shrinking devices, eight die plates and an upper plate, every two die plate are arranged on one side, eight die plates can enclose a square, the two to four opening and shrinking devices are positioned in the square cavity enclosed by the eight die plates, the lower end of the central shaft penetrates through the two to four opening and shrinking devices, and the upper end of the central shaft is welded a handle; second step, erecting the die; third step, pouring concrete; fourth step, removing the die and leaving a hole opening; fifth step, cleaning the hole opening: gigging the concrete surface surrounding the hole opening by using an iron hook or a steel wire brush, cleaning up the garbage in the hole and sealing the hole opening to obtain the large equipment foundation reserved foundation bolt hole. The method is simple, and the used die is simple to operate, is fast to disassemble and can be reused.

Description

technical field [0001] The invention relates to a construction method for reserving anchor bolt holes for large-scale equipment foundations. Background technique [0002] In the construction of large-scale equipment foundation, the anchor bolt holes of the equipment need to be reserved on the concrete foundation. The reserved method generally adopts the method of supporting steel bellows, plastic pipe or supporting wooden formwork, etc., and removes it 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 holes; the wooden for...

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 adopted. Steel bellows and plastic pipes are standard materials with equal diameters, which cannot meet the requirements of a large lower opening and a small upper opening, and cannot be dismantled.

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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