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Chimneys may develop cracks (both horizontal and vertical) due to factors such as years of operation, insufficient hoop reinforcement and seismic vertical reinforcement during construction, high temperatures, lack of or insufficiently high internal lining, and the absence of insulation material in the insulation layer. To ensure safe production and eliminate potential hazards, chimneys must be reinforced with additional hoop and seismic vertical reinforcement, based on the actual condition of the cracks (specific reinforcement methods include adding hoop reinforcement and seismic vertical reinforcement, as well as carbon fiber reinforcement).

Introduction: Project Overview and Features This project involves the reinforcement of our company's chimney, which stands at a height of 60 meters with an inner diameter of the outlet at 1.6 meters. The inner lining is constructed with refractory bricks and acid-resistant mortar. The project falls under the category of tall structures with high construction heights, significant difficulties, and complex construction techniques. However, our company boasts a team with both theoretical and practical expertise...

1. Project Case: This project is the 76.5m square chimney for the Shanshan Waste Incineration Power Generation Project in Guilin City. Designed with a square slab reinforced concrete foundation, the burial depth is -3500mm, with one ash pit at +0.00mm, and the chimney is equipped with three flues. The foundation uses C30 concrete. The outer diameter of the cylinder at +0.000mm is 10700mm x 10700mm, and the outer diameter is 8100mm x 8100mm. The cylinder has a thickness of 86.7mm below +15000mm, and none above.

2. Construction Technology of Civil Construction Chimneys 2.1 Foundation and Substructure Construction 2.1.1 Formwork Engineering According to the drawings, the chimney foundation is square. The foundation is centered on the bedding layer, and after verification, it is marked around the square foundation with chalk lines. Formwork is set up along the lines. The foundation height is 1200mm, using wood sandwich boards as formwork, with bolts for tensioning. After the formwork is set up, the focus is on verifying the ring dimensions, the rationality of the support system's load-bearing capacity, and the verticality of the formwork.