Construction method for circular foundation bolt hole reserved for equipment foundation

Abstract

The invention relates to a construction method for a circular foundation bolt hole reserved for an equipment foundation. The construction method is characterized by comprising the following steps of: step one. assembling a mold for manufacturing the circular hole reserved for the equipment foundation, wherein the mold comprises a central shaft, a first propped open and contracting device, a second propped open and contracting device, four mold plates and four joint sealing plates; the four mold plates are arc-shaped and distributed along the circumference, the joint sealing plates are inserted between the mold plates, and the four mold plates and the four joint sealing plates form a cylindrical space in a surrounding manner; step two. supporting the mold; step three. pouring concrete; step four. removing the mold, and reserving the circular hole; at the moment, plastic films serving as protective layers of the mold plates in the circular hole and cement paste on the surface of the concrete come off in the initial setting and are convenient to clean; and step five. cleaning the hole, and obtaining the circular foundation bolt hole reserved for the equipment foundation. The construction method is simple to operate, is fast in mold dismantling; and the mold can be repeated used.

Description

technical field [0001] The invention relates to a construction method for reserving circular anchor bolt holes for 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 holes; the wooden formwo...

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, which cannot meet the requirements. requirements, and cannot be removed

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

Images