Given that pile foundations carry a heavy load, it is up to a foundation piling London company to ensure that they are properly designed and built. Great engineers take the time to study the soil that the pile will be placed in to ensure that it isn’t overloaded beyond what it is naturally able to bear.
The piles that are placed into soil have what is called a zone of influence on the soil around. Piling companies must take care to space piles far apart enough that the load will be distributed evenly across all the soil they are in, and that it isn’t concentrated to a few areas. This ensures that neither of the soil, the piles, and the structure are not damaged.
Engineers typically group several piles together, and top them with a pile cap. This power will be a sick Made of concrete that extends over several piles, and serves as the base that a column can then be constructed. The load of the column then be distributed evenly to every pile in the group.
How Do Piling Contractors in London Build Piles?
A pile can easily cast-in-place or they can be precast. A cast-in-place pile is made by:
hammering a thin steel tube into the ground
removing the Earth left inside the tube
lowering a steel reinforcement cage into the tube
casting the pile by pouring wet concrete into the tube
The thin steel tube is known as the casing, and it is used to create a secure mould for casting concrete that is free from any debris and earth. The casing plays no structural role after the casting has been completed.
Certain soils are highly cohesive, meaning that if someone was to drill a hole into the soil, such as a hole that is 1 foot wide and 50 feet deep, then the soil would hold the shape of the hole and would not collapse into it and block it. If this kind of soil is at the site, then there is no need for a piling company in London to leave the casing in place: the casing can be used to drill the hole for the pile, and then removed, ready for the pile to be cast in place. This saves a piling contractor money as they can then use the casing tube to drill the holes for other piles.
A precast driven pile will be cast at ground level and will then be hammered or driven into the ground with a pile driver. A pile driver is a machine that will hold the pile vertically, and then hammer it into the ground with repeated blows. The blows of stroke by lifting heavy weights and dropping them on top of the pile. The pile will be temporarily covered using a steel to prevent it from disintegrating during this process. The pile driver serves two functions. The first of these, is that it acts as a crane, to lift the pile from the horizontal position on the ground and rotate into the correct vertical position. The second is that it hammers the pile into the ground.
A pile must be hammered into the ground until it reaches the point of refusal, which is basically when it cannot be driven any deeper into the soil. At this point the pile is securely in place and construction can begin.