For sloping ground, for terraced ground, when deep foundations do not reach the rock and risking the thrust of the earth or, sometimes, that of water, build a retaining wall will ensure the solidity of the ground. Different principles exist for such an achievement, which each have their advantage or their specialty and that a professional will advise you to choose according to your land, according to the construction, according to the difficulty or the price. Between the work to be done beforehand, the precautions to be taken, the drainage to be carried out, the finishing work and the maintenance to be monitored, you will be better able to apprehend this type of construction and to call on an expert with full knowledge of the facts.
The principle of the retaining wall.
The principle consists of a sufficiently solid wall that can hold back the thrust that comes from a high point, a settlement or infiltration of water. Good resistance will therefore be essential. If this retaining wall can be useful in the upper part, at a buried garage, for example, it can also be useful in the lower part if the slope of the ground was compensated by a contribution of soil allowing to have a horizontal level and a wall preventing this contribution from flowing along the slope. Hanjra work will consolidate your entire construction.
Standards for a retaining wall.
If no specific standard exists for a retaining wall, it is necessary to rely on the DTU standards related to the construction and with regard to the walls or foundations, DTU 13.12 and DTU 20.1, but also in Fascicule 62 of the Cahier des General Technical Clauses (CCTG) and BAEL (Limit State Armored Concrete). Section 9 of Euro code 7 also addresses this issue.
The soil study.
However, before you start, or launch a professional, in the construction of a retaining wall, a soil study will be necessary because, in the presence of clay, peat or mud, it will have no resistance and risk of giving in to the variations that the terrain might suffer. The risk is then the settlement or, even the punching and by this deformation, a complete tilting of this wall. In addition, this soil study will help to calculate the necessary resistance and, thus, the characteristics that will make up this wall.
Prerequisites for the construction of a retaining wall.
Among the rules to be respected, it is necessary to know that:
The wall cannot hold a slope of land of 10% or more;
This wall must not exceed 4 meters high;
The force of the thrust must not reach Before building a retcaining wall, you must know that it is not possible to build it in any condition.
175 deca Newton / m²
Other constraints will be seen in the following paragraphs, such as the need for drainage, for example.
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