Tip 1: How to connect foundations

In expanding the area of ​​private housing, thorough reconstruction, there is often a need to connect the existing foundation with a concrete base extension.The main criterion of the combined frame - resistance to mechanical and other influences.
you need
  • - shuttering;
  • - roofing felt or roofing material;
  • - metal fittings;
  • - scrap;
  • - shovel;
  • - concrete.
Guide
1
Equip trench for the new foundation at the same level, which is the foundation of a new building.Digs the ditch is not over the entire length of the existing and often.Otherwise, the soil exposed, which may lead to active deformation of the concrete base.
2
strengthen old building on the corner inclined props, and the old house foundation - fitting.To do this, drill the holes and secure them with metal objects.Lay the new and Being equipped bases roofing material or roofing felt.
3
If you need to change the depth of the foundation, arrange ledges.Their height should not exceed 50 cm. The first step must be at a d
istance of a meter or more of the existing foundation.Then equip the trench to a depth that is equal to the existing base.
4
equalized new pit and clean it from the earth, stones and other impurities.It is necessary to connect bases at the same level.Prepare the formwork, knock of wooden planks, the dimensions of which correspond to the width and height of the future foundation of the house.
5
Install formwork.Ram at the bottom of the prepared foundation trench with gravel and immediately start pouring concrete.It is recommended to build the foundation of the two concrete layers.The bottom layer - a plastic, top - tougher.Poured concrete closely as possible, to leave no gaps at the junction of the two foundations.In this case the degree of precipitation is lower.
6
Give concrete to harden thoroughly, then remove the formwork.Before you start to build a wall extension, give foundation to stand.

Tip 2: How to connect foundations

quality Whatever may have been the foundations , over time they lose their strength: begin to break, to crack, etc.This happens for different reasons, for example, due to physico-mechanical changes of ground layers.The solution in this situation is to strengthen, or as it is called, the binding foundation.
How to tie foundations
you need
  • - metal reinforcement;
  • - reinforcing mesh;
  • - hot profiled beam;
  • - edge beam;
  • - metal plates;
  • - wooden bridge.
Guide
1
From perpendicularly intersecting metal rods to create the frame.The distance between the individual points of intersection must be 1.5 meters (each row should consist of four rods).
2
pre-lay a framework for reinforcing mesh, welded it to the metal rod.
3
sulfates Damaged concrete foundation can be strengthened by the overlap in certain places hot rolled profiled beams, the ends of which should be based on further laid the foundations .This method of binding the bases can be used in the case when it is necessary to unload the pier foundation, which eventually lost its former strength.
4
Set along the edge beam of foundations made of metal channels, which should be tightened bolts.Pass the edge beam through a masonry foundation.All joints connect the welding metal pads.When installing randbalok they should rely on the metal beams laid on the temporary supports.To prevent the loss of certain elements of the old foundations, place temporary wooden bridge.
Note
Strengthening the foundations requires certain skills, so play it safe, trying to solve this problem.It is better to entrust the execution of such work professionals with years of experience.
Helpful Hint
often on brick foundations, even those that have been reinforced, may have cracks and other damage, which is why the foundation will be divided into separate units, which will continue to be subject to intense destruction.However, concreting not eliminate the occurrence of cracking or delaminating.Yet concrete foundations are destroyed more slowly than brick.First cracks, bulging occurs gradually disintegrating elements, which leads to loss of integrity of a monolithic foundation.The destruction of the concrete bases occur in the same sequence as the concrete, but more slowly.All these details should be taken into account by performing the binding foundation.
Sources:
  • article about repairing the foundation with his hands
Note
foundation tends to sink.Therefore, when the equipment and the connection with the old base should take into account the depth of soil freezing.In the corners of the new foundation recommended to install the pile, absorbed into the ground about a meter, connect two reinforcing cage and pour the combined area of ​​the concrete.
Helpful Hint
new foundation necessary to lay flush with the already existing structure.Metal fittings, stabbed in specially drilled holes around the perimeter of the base, increases its strength.

0
0