Leader drilling of wells under piles: technology, benefits and features

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2020-03-31 23:20:14

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The Leader allows drilling to install piles in a vertical position in areas with dense soil. This method is most relevant in winter, because facilitates the driving of pile during the laying of the Foundation.

The Popularity of such technologies is increasing annually. Leader drilling not only reduces the resistance of the soil, but also to immerse the design in great depth. In addition, when performing work reduces the level of noise and vibration. This is one of the advantages of the method.

leader drilling

Features

At the stage of design specialists determine the method of laying the Foundation, and a number of technology requirements and performance.

Drilling leader wells is carried out only after the preparatory work. Are primarily determined by the size of the piles. The leader diameter wells should be 3–5 inches less than the diameter of the reinforced concrete structure.

All work must be carried out in accordance with SNiP. Leader drilling is carried out before the driving of reinforced concrete structures in the ground. This technology is used very often due to the reduction of vibration and noise. After all piles are driven into the ground quickly and without much difficulty.

Diameter of the screw, which is used in the drilling of wells, depends on what kind of soil is in the ground. The depth should be about 1 meter less than the depth of the pile. It should be noted that the driving of reinforced concrete structures and pre-drilling is carefully planned by many experts. It allows you to fully comply with the technology and optimally place the pile in each case.

What situations require drilling

The Leader drilling of wells under piles often used when laying foundations on Foundation piles. The design can be of any size and of varying complexity. Most often this method is applied in the following cases:

  • If during the geological investigation revealed a layer of compacted sand. The percussion laying a ground pass is almost impossible. As a result, the leader is drilling for piles.
  • If the top soil layer. The percussion-tool method of laying the pile can result in the destruction of concrete structures or to occur its deformation. Pre-drilling allows without complications pass the problematic soil layer.
  • If work is carried out on the eternally frozen ground. Such soil is dense enough. To avoid problems it is recommended that the leader drilling.
  • If the area is dominated by rocky ground. Methodology for impact rock be an insurmountable barrier.
  • If the piles will be placed at a considerable depth. In this case, it may be failure of the pile. As a result, to get to the desired level is not possible without drilling.
  • If the area, where the laying of the Foundation, is dominated by particulate soil having a minimum density. In this case especially appreciated the guide function of drilling.

drilling leader wells

Usage

This method of laying the pile is often used when building foundations on the site, closely located around structures. Such a method allows to reduce the noise level when working, and reduce vibration when driving reinforced concrete structures. Leader drilling can be done in densely populated areas, located in the city.

This technology allows to significantly speed up the process of laying the pile Foundation. Such drilling does not violate the integrity of concrete structures. Thus the technology allows to achieve the desired depth, while providing a rapid flow of threat and problem areas on the building site.

leader drilling under piles

How is drilling for piles

The Leader drilling is performed using pile drivers installations with drilling rotators. They replace pile hammers. The key to this is the observance of verticality. Only in this case it is possible to perform quality work. This is achieved by drilling rotators.

At work requires taking away the soil. Is being manipulated manually. If this is not done, the extra soil will not allow you to install the piles. Due to the removed soil, the mark increases by about 50 centimeters.

leader drilling of wells under piles

Stages

The leader Process of drilling and laying of piles can be divided into several stages:

  • On the plot are marked by points wherewill be hammered piles.
  • Equipped with special equipment. The units are mounted in the marked places.
  • Technique is prepared, test the levels of verticality.
  • Will the drilling of wells by means of special holes.
  • Is the clogging of reinforced concrete structures in the ground.
  • Conducted the examination of each installed pile. They surrender to the representative of technical supervision.

When executing the leader-drilling screws can be used in several types: continuous and composite construction. In the first case the creation of the well is a non-stop process. This saves time and also ensures high quality of work performed.

the cost leader drilling

Technology Advantages

The Popularity of the leader drilling can be explained by its advantages. Among the advantages of this technology are:

  • The Ability to install piles on a site with different soil types and with any characteristics.
  • Technology allows to significantly increase the depth of backfill of concrete structures.
  • Compliance with all the rules of installation of piles. Considered an indicator of verticality.
  • High quality of works performed.
  • Reduce the level of vibration to neighboring buildings, when driving piles.

Disadvantages of technology

The disadvantages of leader drilling should include:

  • Tangible material costs incurred in overcoming some of the bureaucratic obstacles.
  • The Involvement of specialists, and the use of equipment.

Despite the large number of advantages, the technology has one insignificant drawback. Is the price of the work. Leader the cost of drilling depends on several factors. First of all, the depth of backfill and the type of soil on the site. The average figure is 300–1,500 rubles for 1 meter.

leader drilling SNiP

In conclusion

The leader drilling Technology is constantly improving. The method applied in those places where it is impossible to do without additional processing of the soil. This technology is important when driving reinforced concrete structures in problem areas. Special equipment much fits the process of laying the Foundation of the future of the Foundation. Importantly, when performing work to comply with all recommendations of experts and to follow the rules.


Article in other languages:

AR: https://tostpost.com/ar/business/21711-leader-drilling-of-wells-under-piles-technology-benefits-and-features.html

BE: https://tostpost.com/be/b-znes/39225-lidernoe-burenne-sv-drav-n-pad-pal-tehnalog-ya-peravag-asabl-vasc.html

DE: https://tostpost.com/de/business/38737-lidernoe-bohrungen-unter-der-pf-hle-technologie-vorteile-und-merkmale.html

ES: https://tostpost.com/es/centro-de/38499-lidernoe-de-perforaci-n-de-pozos-debajo-de-los-pilotes-la-tecnolog-a-l.html

HI: https://tostpost.com/hi/business/23281-leader-drilling-of-wells-under-piles-technology-benefits-and-features.html

JA: https://tostpost.com/ja/business/21288-leader-drilling-of-wells-under-piles-technology-benefits-and-features.html

KK: https://tostpost.com/kk/biznes/39597-lidernoe-ymalardy-b-r-ylau-astynda-adalar-tehnologiyasy-arty-shyly-tar.html

PL: https://tostpost.com/pl/biznes/41306-lidernoe-wiercenia-pod-pale-technologia-zalety-i-cechy.html

PT: https://tostpost.com/pt/neg-cios/40961-lidernoe-perfura-o-de-po-os-sob-pilhas-de-tecnologia-caracter-sticas-e.html

TR: https://tostpost.com/tr/business/36123-lidernoe-sondaj-kuyu-alt-nda-kaz-k-teknoloji-faydalar-ve-zellikleri.html

UK: https://tostpost.com/uk/b-znes/40048-lidernoe-bur-nnya-sverdlovin-p-d-pal-tehnolog-ya-perevagi-osoblivost.html

ZH: https://tostpost.com/zh/business/24595-leader-drilling-of-wells-under-piles-technology-benefits-and-features.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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