Is Jumpform or Slipform the Best Approach for Your Construction Project?
To build a new structure, you'll need to work with various designers and contractors to get everything done. You may need to work with concrete contractors to form the shape of the building, and if this is a tall building, in particular, you will want to know about their specific approach. In this situation, they may use one of two processes — jumpform and slipform — so what is the difference between each?
Self Climbing Application
Either one of these tactics can be used when applying a "self-climbing" approach to building construction. They're particularly handy if you need to create an elevator shaft in the centre of the building or a tall chimney elsewhere.
The Overall Process
These approaches are quite similar in many respects. The concrete is poured into a mould that will then "climb" from level to level until the structure reaches the desired height. These moulds will climb using electric motors or hydraulic rams, and you may not need external cranes in some cases. In the beginning, the contractor will create an adjacent work deck or platform that will climb at the same rate as the individual forms. This makes it easier for employees to pour the concrete and perform any reinforcement as work continues.
Jumpform
Jumpform works on the basis that the individual form will only move to the next level once the concrete is poured and has set in that initial location. The form will only "jump" to the next level once a supportive foundation is in place, and this is an excellent approach if any joints in the structure have to be sealed off as work progresses. Sometimes, the form is raised on individual rails, while at other times, a crane may need to be brought in to move everything upwards.
Slipform
Slipform is very different insofar as the form moves slowly while the concrete is being poured and relies on the core of the structure for support. So, in this case, you would need to wait for that individual section to dry and set, and the concrete will be delivered in one long, uninterrupted pour. This approach works well with more complex designs, such as tapered structures. Individual stations may need to be established at various levels of the structure to ensure the process can continue without interruption.
Getting Further Advice
These are the fundamental differences between jumpform and slipform when it comes to concrete pouring. You should always work with your contractor to see which would be best in your case, as much may depend on the overall design and function of the structure.
Speak to a slipform contractor today to learn more.
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