Reinforcement of old industrial buildings

Engineering survey

A coal preparation plant was built in 1986, and 3 million tons of raw coal was selected. The original design adopted the jigging, flotation, heavy medium and pressure filtration process. With the continuous development of coal preparation technology, in 2003, the leader decided to adopt the new process, the three product dense medium cyclone coal preparation technology, so we must reinforce the main building components. The structure of the original workshop is a multi-layer reinforced concrete frame with good foundation conditions. The original construction quality is good and the maintenance is good during the use. The detection of engineering structures, according to data provided by the field detection, reliability assessment standard based on reliability of existing structures are identified and recognized by the reinforcement can satisfy the requirements, put forward the reinforcement scheme of the local beam, slab, column.

Reinforcement scheme

1.Column reinforcement:steel jacketing. Connect the angle steel, the steel hoop through bolts and epoxy resin with concrete, and work together. The upper part of the steel plate is wrapped with wire mesh, and the high strength mortar is used for anticorrosion.

2. Beam reinforcement: increase the section method,part only add the height of the sorghum; the width and height of some beams increase simultaneously. The connection of the additional main tendons and the columns is to use the method of planting rebar reinforcement.

3. Slab reinforcement:demolition of the slab that is not in conformity with the requirements, and then rebuilt. The connection of steel and beam using the technique of planting rebar reinforcement

Steel plate bonding

1.drilling hole
2.preparing the surface
3.installing the steel frame
4.sealing and setting gas vent
5.mixing and injecting the adhesive
6.curing and maintenance
7.examination
8.applying anti-corrosion measures

Steel plate bonding for column 

Increase the section method:planting rebar reinforcement

1.Drill hole to the diameter and depth required. The diameter must be in accordance with anchor size.

2.The drill hole must be cleaned with air blower, starting from the bottom of the hole.The drill hole mustbe thoroughly cleaned with steel brush. After brush, to use air blower to clean the drill hole again.

3.Inject resin anchor resin into the hole, starting from the bottom, while slowly drawing back the static mixer. In any case avoid entrapping air. For deep holes extension tubing can be used.

4.Insert the anchor with a rotary motion into the filled drill hole. Some adhesive must come out of the hole.

5.During the resin hardening time the anchor must not be moved or loaded.

Increase the section method:planting rebar reinforcement

The conclusion is that the construction of the main building of the coal plant is less than four months. Completed in 2003, which satisfied the requirements of the new process, reduced environmental pollution and achieved considerable economic and social benefits, and achieved the desired results.