Auxiliary winch

Kelly winch

Casing driver

Drilling tool (e.g. auger, bucket)

Kelly bar (retracted)

Casing

Rotary drive

Kelly rope

Leader

Leader top for Kelly rope

Crowd winch

Casing oscillator (optional)

<p>Kelly drilling belongs to the most common dry rotary drilling methods and is used for the production of bored piles with a large diameter (from a size of approx. 500 mm). The process is suitable for nearly all types of soil and rock. The soil is conveyed with relatively short rotary drilling tools, such as augers, core barrels, buckets and special drilling tools. A typical element of this drilling method is the drill rod, the so-called Kelly bar, which is telescopic and facilitates large drilling depths.</p>

<h3>Procedure with uncased Kelly drilling:</h3>

<p>1. Installing the protective pile</p><p> 2. Emptying, e.g. with an auger</p><p> 3. Inserting the reinforcement</p><p> 4. Concreting</p><p> 5. Finished pile</p>

<h2>Video Kelly drilling</h2>

<p>The video shows Liebherr drilling rigs in different Kelly drilling applications.</p>

<h3>Cased Kelly drilling</h3>

<p>When the soil is insufficiently solid or in case of groundwater ingress boreholes must be produced using a casing.</p>

<h3>Uncased Kelly drilling</h3>

<p>Solid, dry building ground allows borehole installation without a casing. </p>

<h3>Change of drilling tools</h3>

<p>For diverse soil conditions augers, core barrels, buckets and special drilling tools are used.</p>

<h3>Short leader</h3>

<p>For drilling work with restricted headroom special short leaders are available.</p>

<h3>Casing oscillator</h3>

<p>When the torque of the rotary drive is insufficient, hydraulic casing oscillators are applied.</p>

<h3>Removal of drill cuttings</h3>

<p>Alternate rotating and shaking of the auger on the surface removes the loosened soil from the auger.</p>

<h3>Insertion of reinforcement cage</h3>

<p>After the borehole has been produced the reinforcement cage is lifted into the borehole using the auxiliary winch of the drilling rig.</p>

<h3>Concreting of the pile</h3>

<p>Immediately after the reinforcement cage has been inserted the borehole is filled with concrete.</p>

<h2>Machines</h2>

Teaser

Spezialtiefbau

LB-Serie

(not set)

<h3>Kelly drilling with an LB 45</h3>

<p>Foundation piles for the new Neckartal bridge at Heilbronn (GE).</p>

<h3>Kelly drilling with LB 36</h3>

<p>The 130 year old bridge needs to be renovated.</p><p><div  class="copy-link" data-video-modal-id="video-id-5059125-5059132-21">Video</div></p>

<h3>LB 20 with BAT 230 rotary drive</h3>

<p>Expansion of the Federseeklinik in Bad Buchau (GE).</p>

<h3>LB 16 unplugged</h3>

<p>New roundabout with two bridges over the motorway.</p>

<h3>LB 24 with rock drilling augers and buckets</h3>

<p>A luxury resort is being built at the bay of Kotor in Montenegro.</p>

<h3>Cased Kelly drilling with rock drilling auger</h3>

<p>Further berths for cruise ships ath the Port of Split.</p>

<h3>Tools for professionals</h3>

<ul><li>Augers, drilling buckets, core barrels,  casing drivers, casings, cutting shoes, etc.</li><li>Wear  parts (chisels, teeth, blocks)</li></ul>

<h2>It was close!</h2>

<h2>LB 45 Animation</h2>

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<h2>Get in touch</h2>

<p>If you have any further questions, please contact our local sales or service team.</p>

Drilling tools for Kelly drilling

Solutions for deep foundation work

Info flyer Compendium deep foundation part 1: Drilling

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<h1>Kelly drilling</h1>

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Kelly drilling belongs to the most common dry rotary drilling methods. Soil and rock material is conveyed to the surface discontinuously with relatively

Kelly drilling | Liebherr deep foundation

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