When tall structures in concrete are to be built, slipform construction is usually seen as the best-suited building method. What does the term slipform mean exactly? Simply put, slipform is the name given to the hydraulically controlled formwork into which concrete is poured. It is widely used in construction projects and is also called the continuously formed or slipform construction method. The well-known method is used for the construction of tall structures such as dams, bridges, buildings, and towers.
So, why is slipforming so commonly used? Slipform is undoubtedly the fastest and most economical construction method available for high-rise concrete structures. This is because it helps to provide an uninterrupted and continuous process for concrete that sets quickly. There are different types of slipform construction such as traditional (vertical) and gantry supported, as well as tapered and conical slipforming.
What is Slipform Construction?
Nowadays the way businesses build concrete structures has evolved enormously as compared to earlier times. It now included the utilization of the latest machines and equipment available in the market and the adoption of new construction methods that can simplify complex construction processes. Read on to know more about the meaning, benefits, applications, and components of slipform construction below.
As mentioned above, this type of construction method entails concrete being poured into a continuously moving form. As the slipform method largely depends on the quick-setting properties of concrete, a great deal of balance is required to be maintained between its workability and quick-setting capacity. What are the advantages of slipform construction?
Benefits of Slipform Construction
There are multiple advantages of using this technique for construction such as the following:
Of course, safety comes first. Slipform construction greatly reduces the risk of workers getting injured on site. This is through the system’s use of small increments in the climbing process that is connected to the structure at regular intervals.
As the slipform construction setup is highly compact, it can be pre-assembled and saved the precious time of the workers.
Slipform assembling companies come highly recommended by many businesses as they offer a quality finish, with cost and time-effective as well as sustainable use of materials.
Slipform Construction – Uses, Components, and Features
Traditional slipforming is one of the oldest and most conventional slipforming methods used. It involves the use of hydraulic jacks along with other equipment in order to raise the levels of structures. It is mainly used in the construction of tall structures such as domes, skyscrapers, and towers.
The conical slipforming method is a more developed version of traditional slipforming with the main difference in this technique being the change in the length of the cross-section diameter, as the variation depends on the height of the structure being constructed. The change in the cross -section is what eventually results in the conical shape of the structure.
Originally, conical slipforming was developed to construct concrete structures, with continuously changing dimensions like wall thickness. These thick walls are among the main features of slipform construction. The thickness of the wall constructed depends on multiple factors along with the cross-sections such as the size of the cone, the material used in construction and of course, the height of the structure.
The tapering slipform method of construction is to construct high rise structures efficiently, which helps to reduce the duration of construction projects. In traditional slip forming, the concrete formwork can also be surrounded by a platform for the on-site workers to stand on as the concrete is poured.
Applications of Slipform Construction
The applications of conical slipforming are seen in the construction of oil platforms, cooling towers, industrial chimneys, bridge pillars, and other tall concrete structures. Generally, these types of structures involve the changing thickness in shapes, diameters, and walls. While the technology was initially developed for constant cross-sections with precise vertical orientations, it was later further developed for use in variable layout shapes. This process provides a monolithic construction method that enables the easy increase and decrease of layouts. Businesses can learn more about conical slipform supply by contacting a reputed construction equipment company.
What is a gantry? It is a steel-structure that can house a platform. This type of slipform construction utilizes a gantry to build and support various construction equipment. Gantry slipform has now replaced the traditional slipforming method in the construction of repeated concrete structures such as caisson production. Developed as a more cost-effective option, it foregoes the need for dismantling and reassembling during construction as well as the use of cranes. It has also proven to be much more convenient and safer for on-site workers because of the additional space for them to move around and store equipment.
Unlike the traditional slipform method, which requires continuous installation of jack tubes for the slipform jack to climb on, Gantry Slipform Method has the climb tubes and jacks completely outside the caisson geometry. This facilitates the work because they and never interferes with the rebar installation. The jack rods will also last for the complete project.
Advantages of Slipform Construction
Due to speedy industrial development, a large number of buildings, harbours, chimneys, LNG- tanks, etc. are annually constructed using slipform construction technique. The main advantage of slipforming is that the formwork is erected only once but remains intact until the entire project has been completed. With the implementation of careful construction processes such as conical slipforming, companies can achieve higher rates of production. Some of the other benefits of opting for the slipform construction methods are the minimal use of cranes, the need for a much smaller workforce, and the resulting availability of different working platforms. While there are a few minor disadvantages of slipform construction, they are outweighed by the advantages offered.
Safety tips for Slipform Construction
Building with slipform construction provides the safest, quickest and most economical results. As it does not require any dismantling and reassembling using heavy pieces of equipment, the entire process is very secure. The method uses hydraulic slipform jacks that allow the whole construction formwork to be continuously raised at a height. To learn about safety tips for slipform construction, businesses can contact reputed slipform engineering or slipform construction specialists and also get a better understanding of slipform construction
The process of construction is a long one. The several procedures, equipments involved shapes a structure a certain way. So, the instruments used for the process of construction play a vital role. One major equipment used by companies is the crane lifting equipment. Cranes are used for heavy lifting in industrial and construction companies. This equipment is used to lift heavy loads and is considered to be one of the most important possessions of bridge building companies. Cranes are as varied and diverse as the construction trade itself. And each of them is designed to fit a specific need or a combination of needs. Concrete bridge construction companies use different types of cranes as per the use. The range of cranes include:
Industrial cranes stand true to their name as they are capable of functioning in tight spaces and rough terrains. The speciality of this type is it has the ability to function in an area where accessibility is a concern. Industrial cranes are in the structure of a four wheel steering, which makes the functioning smooth. They are usually found at industrial job sites.
Hydraulic Crawler Cranes
This type of crane is typically used for reaching the minute areas, thus maximizing their reach. The design of this crane enables functionality in wet and muddy terrains. One major advantage of this crane is it feature of portability. With their tracks retracted, these cranes can easily be transported by trucks to different job sites.
Rough Terrain Cranes
Rough terrain cranes are designed to function seamlessly on rocky, uneven land. The height that this type of crane covers is anywhere between 60 – 200 feet. This kind of reach makes the process of construction simpler and faster. It is designed to have four to six outriggers that are capable of doubling the width of the crane’s base width.
All Terrain Cranes
An all terrain crane has the ability to move across multiple job sites, thus saving money. It is said to have a higher boom reach than other type of cranes. It is built to have six large tires, which allows it to tackle soft uneven ground as well as rocky grounds.
Safety Tips for Operating Crane Lifting Equipment
1. Ensure the crane equipment is handled by qualified workers
2. Inspect the load and the equipment before the procedure of lifting begins
3. Ensure workers clear the area of crane operation to avoid accidents
4. Review the safety checklist before operating the crane
Cranes make heavy lifting situations effortless, thus increasing productivity and providing a safe and healthy alternative for construction procedures. Considering the number of cranes available in the market, construction companies have a number of options to choose from depending on the type of land, weight to be lifted and more.