The foundation in the swamp do it yourself

Marshy soils are subject to seasonal fluctuations to a greater extent than all others. They are oversaturated with fine particles and therefore often form fluids. In the winter, they freeze and swell, in the spring they are washed out when the groundwater rises. Putting the foundation in the swamp with your own hands is a difficult task, but completely solvable. The main thing is to study the soil and correctly choose the type of support and the depth of its foundation.

Preliminary work

It is imperative to establish the composition of the soil and its change on different horizons, as well as to determine the occurrence of aquifers and assess the terrain. You can do the research yourself, but it is better to involve specialists in this To analyze the soil content, you will have to drill several wells at different points, or dig up holes.

If the soil is not very swampy, it is enough to make a drainage area to avoid submerging the future structure.

In some cases, the thickness of the peaty layer is small and can be simply removed. Then the foundation is set on a stable rock, which is located below. His view is taking into account other technological or financial considerations.

In other cases, you have to choose from two options:

• pile foundation;
• monolithic slab.

Finally, the project is approved taking into account the structure of the structure and the total pressure on the base.

How to build a foundation in the swamp

Pile foundation allows you to go through unsteady layers and rely on a reliable soil that can hold heavy loads.

Usually, several types of piles are used for erection:

1. Screw metal. Not too durable, because in an acidic environment, iron will quickly oxidize;
2. Zabivny. Their installation is expensive and requires the use of construction equipment, but its access to the site may be difficult;
3. Bored. Installed on pre-drained soil. Creating a foundation using such piles involves a large amount of work, and is also expensive.

Whatever type of support you choose, a grillage is constructed above them. For wetlands it is made in the form of reinforced concrete floors.

Monolithic slab foundation - a universal remedy for the construction of the support of the house on the marshy areas. It is expensive, but it is quite reliable. The base turns floating, and a large footprint distributes the load well from all sides. This avoids deformations of the building and its individual elements.

How to make a slab foundation

Step number 1. Before pouring the slab, you need to prepare the soil under it. The top layer is removed by about a meter and a pad of gravel, stones and sand is poured. Sometimes it is partially replaced with construction debris. Everything is thoroughly wetted and rammed. Such a sand-gravel bedding allows groundwater to move under the sole, without stopping, and swell less in winter.

Step number 2. A thin layer of cement mixture is spread over the pillow as a substrate. It should smooth the rubble surface. In 48 hours it will dry up and then it will be possible to put insulation. Typically, for this purpose, use foamboard or polystyrene foam plates with a thickness of 10 cm.

Step number 3. From above stack several rows of a rolled waterproofing agent, for example, roofing material. It will not allow soil moisture through the capillaries to be absorbed into the concrete base. It is even better to use polymer diffusion membranes. They not only protect the concrete from the bottom of the water, but also at the expense of vapor-permeable properties, they remove moisture from it.

Step number 4. Installs formwork. Removable fencing is assembled from boards, fastened with nails, but you can use fixed sheets of foam, which will also become insulation.

Step number 5. Armature for the foundation in the swamp need to choose increased strength, with a diameter of twelve 12-16 mm. A two-level grid with a cell size of 15x15 cm is formed. Bandages are made with steel wire.

Step number 6. Concrete is poured at a time so that inside there are no seams that weaken the structure. The solidifying mass is treated with a deep vibrator to remove air from it. In conclusion, the surface is aligned with a vibrating rail. The stove will dry and gain strength for at least a month. To keep the process going evenly, the pad is covered with PVC film and moistened from time to time. The readiness of the foundation can be determined using the same polyethylene: when the condensate on it ceases to settle - the process is completed.

Step number 7. Formed plate must be protected from moisture on top and sides of the coating with waterproofing. It will close the concrete from freezing and mechanical damage.

With a small budget, building a foundation in a swampy area is very difficult. Even on light and dry soils, casting supports takes between 1/5 and 1/3 of the total cost of a house. Therefore, it is necessary to decide on the type of foundation and building materials even before the purchase of a land plot, and for this you need to have complete information about it.

Is your home built on swampy soils? Tell us about its construction and the quality of the foundation, leaving a comment on the article.

Video

We recommend to watch a video about the construction of a monolithic foundation on a peat pad.