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What is Rectify Underpinning Melbourne in construction
The purpose of the foundation is to provide a solid base.
To strengthen the shallow foundation when an adjacent building will be built with a deep foundation.
To strengthen an existing foundation that has settled and cracked the walls.
To deepen an existing foundation that is resting on poor soil strata. This will allow it to be resting on a deeper stratum of higher bearing capacity.
To build a basement within an existing structure.
There are different types of underpinning for foundations.
Methode de pit
This method involves dividing the foundation into sections of between 1.2 and 1.5 m in length. Each section must be completed one at a time. Each section is given a needle and a hole in the wall is made above plinth height.
It can be made of steel or a thick timber section. The bearing plates placed over the needle support the masonry. On either side of wall, the needle is held up by crib supports and screw Jacks. The foundation pit will be excavated to the level desired and then a new base is laid.
The first section of the underpinning is the alternate section. If the wall that needs to be anchored is weak, it may be necessary to provide taking shores. If required, you can also imply the floor.
Cantilever needle beams can be substituted for the central beam if there is an existing interior column or the foundation will only be extended to one side. Jacks are placed between the wall and column.
The pit method should include the following points
The alternate section will be taken in the first round. Then, the remaining sections of intermediate are selected. Only one section at a time should be used.
If the wall is very long, work begins in the middle of the wall and extends both directions.
If the new foundation will be deeper than the old one, the trench can also be properly timbered.
Only remove needle beams, etc. when your new foundation is strong enough.
It is preferable to pour the concrete for new foundations.
-A needle holes etc. Close all masonry with cement mortar.