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الثلاثاء، 25 أكتوبر 2016

Techniques For Foundation Excavation In Layton

By Brenda Foster


Ground excavation is the preliminary step of a construction project. Excavation activities are involved from the beginning of a building project up to the end. The process includes safety building measures based on the depth of pits and site clearance. Different equipment is used depending on the size of the building. Manual tools such as crowbars and spades are used in the construction of small buildings, unlike the large buildings that require mechanical equipment. In a nutshell, the following information explains the basic procedure to follow in foundation excavation in Layton.

Materials such as tree stumps, vegetables and brushwood must be cleared from the construction site. All tree roots above 30cm from the foundation level should be uprooted. Uneven ground surfaces are not suitable for construction works. Spaces and pits left after the removal should be filled with soil to ensure that the surface is even.

Set a groundwork layout for the construction work. A benchmark is established at the site by a masonry post and connected to the closest yardstick. Levels of the site are taken at 5-10m or 4-8 m intervals depending on the significance of the building and the terrain. Stretching strings are used to mark the centre lines of the walls across wooden pegs. It is important to set the right angle of perpendicular walls by marking their centre lines with tapes or theodolite.

When dealing with soft and loose soils, you should do open planking. Horizontal boards are placed against each excavation side. Vertical boards that are matched to similar pieces of timber on opposite side of the trench are used to support them. One should avoid risks associated with the collapse of the trench. Careful withdrawal of the wood pieces will help to prevent such risks.

Dry surfaces provide a friendly environment to work in. It is important to dewater waterlogged surfaces to ease your job. Laying of concrete beds and building of masonry pillars will help to ensure dryness. At times, working on waterlogged surfaces may be a challenge. Clearing water from wet constructional surfaces will enhance the effectiveness of your project.

The water table must be maintained at least 0.5m below the excavation bottom to keep the area dry. There are various methods that can be used to lower the ground water level. There is a lot of information from online sites that will help in deciding the most economical and appropriate method of dewatering.

Masonry walls should be built using cement concrete or lime concrete. The concrete should have a mixture of cement, sand and coarse aggregate that should be mixed in the ratio of 1:4:8. The concrete should be placed well and compressed. Use of mechanical tools and machinery will help to ease your work. Furthermore, it will be save time and management cost.

Concrete need to be protected to avoid cracks. You can use wet gunny bags. It should be protected two hours after laying it. In addition, this should be followed by curing it for at least ten days. Three days after laying the concrete, the construction work can be continued.




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