Mass concrete underpinning is a process of transferring the weight of a building from one side to another. It is suitable for underpinning structures in low depths or in difficult areas. It is also suitable for large structures and formation of new basements and cellars. However, it cannot be used to repair all foundation problems. It may not be efficient if the foundation is weakened by groundwater and fill.
Pile underpinning is the act of driving a steel-cased or polythene piling on either side a foundation wall. Piles are connected to reinforced concrete beams and driven into the wall. These piles are then covered with needles. This type of underpinning is used for soil settlement due to waterlogging and clayey nature. Mass concrete is designed for withstand the loads of a building, without compromising the foundation’s integrity.
The beam and base method of mass concrete underneathpinning is the most popular. It involves constructing reinforced concrete beams below and above the footing and then transferring the loads to the mass concrete bases that are strategically located. The location and size of the base and beam will depend on the ground conditions, building configuration and the applied loads. Sometimes, anti-heave precautions are taken to protect the building. Low-density polystyrene, which is suitable for clay soils, is often used between the footing and base.
A second type of underpinning is called pile underpinning. This technique involves installing two-to-three-meter-diameter steel-cased piles underneath a building foundation. The concrete is driven on adjacent sides of a divider to provide support for the wall. These piles are known as mini-piles. These piles can support more than 1,000kN of load in either direction.
The mass concrete underpinning technique uses a series of concrete pilings to support the building. Usually, the ground is excavated then reinforced with steel. The piled concrete then goes into the pits. The mass concrete underpinning method is suitable for a shallow foundation. It is not recommended for deep foundations. This technique is suitable for underpinning structures spanning across the underpinning holes.
This method uses a conventional concrete base. The foundation is connected to the base by beams. The foundation transfers the load to the beam which in turn transfers it into the concrete mass. The mass is spread across the structure to support it. This method requires only rudimentary engineering mechanics, but it is highly effective in certain situations. It can also be used for large-scale construction projects in which the building is being extended up to the roof.
The mass concrete underpinning method is the most common form of foundation repair. This method requires more technical adaptation than other methods. The structure is supported by a reinforced concrete beam that carries the building’s weight. The existing ground conditions determine the size of your beam. A properly installed beam and base will not just ensure structural stability but also enhance the aesthetic appeal of a building. Before underpinning can begin, it must be done carefully.
A reinforced concrete beam above and below the footing is an alternative to mass concrete underpinning. This beam transfers weight from the building to the mass cement bases. There are many factors that influence the choice of the right beam and base design. The smallest base size is preferred for clay soils. Mini-piles are best for areas with limited access.
Due to its low cost and high quality, mass concrete underpinning has been gaining popularity in recent years. This method is a great choice for homes with a weak foundation or a shallow foundation. It is the only way you can achieve the best foundation strength. It is not expensive. It is a simple way to repair foundations in any situation.
Mass concrete underpinning has been a traditional method for underpinning. This method is nearly 100 years old and has many benefits. This method uses reinforced concrete beams in order to stabilize a building. The foundations must be deep enough to support a building. In this case, the foundation should be reinforced with a concrete pile. For buildings with shallow foundations, a pile can be used. This type of underpinning can be ineffective in deep soils.