What are the advantages and disadvantages of slipform construction?

Slipform construction: Slipform, also known as sliding formwork, is the general name of cast-in-place concrete structure construction method, which is formed by using sliding formwork jack and electric hoist as lifting power to drive formwork (or carriage) to slide along the surface of concrete (or formwork).

Advantages:

1. Slipform has no horizontal construction joints and good construction continuity, so it is a "soft demoulding" construction technology. In this process, the number of construction joints is very small, which greatly reduces the workload of chiseling and washing construction joints.

2. The construction progress is fast, the average daily climbing progress is about 2-4m, and the average daily progress of other processes is 1-2m, which greatly speeds up the construction progress and shortens the construction period by 2-3 times.

3. The sliding mode is a closed structure, which is fixed by a climbing rod and a hydraulic jack. After the workbench is formed, the working face is spacious, the consumption of auxiliary materials is less, and the materials such as tie rods, pads and temporary embedded parts are all saved.

4. The smoothness of concrete surface is high, and the workload of concrete surface treatment is small, so it can be handled in time.

5. Slipform construction is carried out on a fixed and closed workbench, and only climbs upward in the process, and all workers work on the workbench, so the safety is high, and the template and workbench are not disassembled in the process, so the safety risk is small.

6, the construction period is short, which shortens the time of template installation and disassembly; In the process of concrete pouring, the hoist is used for vertical lifting, which shortens the transportation time; In the whole construction process, the auxiliary construction time is greatly shortened and the pier forming speed is accelerated.

7, the cost is relatively small, the template investment is less, and the concrete pump machines and tools are saved, and various auxiliary materials are saved, which can be used for construction at night and in rainy days; Shorten the construction period and reduce the management cost.