Concrete Chimney New Construction

Engineering overview：

In accordance with the requirements of the chimney design and construction drawings, ensure that the quality and quantity of the project are guaranteed to complete all construction projects. The content of construction by Party B: excavation of earthwork, backfilling, transport of spoil, cutting of excess foundation pile head, pile hole connection, beginning of chimney foundation with cushion layer, completion of foundation cap, foundation ring wall, inner cylinder equipment foundation , Laying of lightning protection pressure ring; the construction content of the main body above ±0.00m includes the main structure concrete, steel bars, pre-embedded iron parts, lightning protection down conductors, lightning rods, shutters, steel doors, beacon lights, beacon paint, closed construction of the top platform, chimney Internal steel knot platform, ladder production and installation, coiling, production and installation of titanium steel composite board chimney, rust removal and anticorrosion of all steel structure parts (sand blasting is required for rust removal), insulation project of steel chimney, etc. Specifically, it is carried out with design drawings, including loose water. For details, please refer to the construction drawing. This construction includes construction, completion, acceptance, and delivery.
This project is a reinforced concrete structure; it is equipped with a reinforced concrete outer cylinder and a total of 5 floors of platforms. Two titanium steel chimneys are installed inside the reinforced concrete outer cylinder, and the total height of the chimneys is 100m.
1. Foundation: The foundation of the chimney and support of this project is a slab-type pile-raft foundation. The foundation depth is 4.0 meters.
2. Outer cylinder of the chimney: the outer cylinder of the chimney adopts a reinforced concrete structure, the height of the cylinder is 97.0m, the thickness of the cylinder wall is 500mm from ±0.0m to 37.5m, 450mm from 37.5m to 50.0m, 400mm from 50.0m to 97.0m, and the concrete grade for C40.
3. Chimney inner cylinder: the diameter of two titanium steel chimneys is 4400mm, 12.0m～40.0m is 14mm+1.2mm titanium steel composite plate, 40.0m～95.5m is 12mm+1.2mm titanium steel composite plate, 95.5m～ 100.0m is 10mm+1.2mm titanium steel composite plate.
4. Paint red and white navigation marks above 67.0m of the chimney, a total of 6 lines.

Construction process:

Operating platform system
1.1 The principle of hydraulic lifting and turning process
Hydraulic formwork structure, the formwork is installed in blocks, and the slope of the formwork is easy to adjust and control. It can avoid the cumulative error of construction; after the concrete is poured and tamped, because the concrete and the formwork do not move relative to each other, the concrete will not be damaged when it is lifted on the climbing frame, and the quality of the concrete can be guaranteed; the formwork is lifted and placed accurately, and the tool-type support system is operated Simple and convenient, low labor intensity and high work efficiency.
Composition of Chimney Hydraulic Lifting and Turning Construction Device The principle of the lifting and turning process is that the supporting rod buried in the reinforced concrete wall is the main load-bearing body, and the hydraulic lifting system climbs to drive the operating platform system, vertical transportation system and formwork system.
1.2 Characteristics of hydraulic lift turning process
The hydraulic lifting and turning process is a new type of formwork system formed on the basis of absorbing the advantages of formwork systems such as hydraulic sliding formwork without derrick and large formwork, which has the characteristics of easy quality assurance, high safety, and fast construction speed. .
The hydraulic lifting and turning over construction device is composed of an operating platform system, a vertical transportation system, a formwork system, a hydraulic lifting system, and an electrical control system.

“Hongshun Construction Engineering Co., Ltd.” is a large-scale comprehensive construction enterprise integrating civil engineering, anti-corrosion, thermal insulation and steel structure. Specializing in aerial work, including new construction, maintenance, anti-corrosion, landscaping painting, demolition and other construction projects of towering structures (chimneys, hyperbolic cooling towers, ash storage silos).