Solutions for Deep Foundation Work

04 Solutions for Deep Foundation Work Drilling Methods Pile Driving Methods Slurry Wall Installation Soil Improvement 12 Drilling Rigs LB Series Characteristics Attachments Drilling Tools 18 Piling and Drilling Rigs LRB Series Characteristics Attachments

24 Piling Rigs LRH Series Characteristics Swinging Leader Attachments Duty Cycle Crawler Cranes HS Series Characteristics Attachments Features Transportation and Set-up Control and Assistance Systems Operator Comfort Fuel Costs Matter IT Solutions Customer Service and Application Technology

Solutions for Deep Foundation Work Drilling Methods Deep foundation machines from Liebherr can be applied for all common drilling methods. These include Kelly drilling, continuous flight auger drilling, full displacement drilling, double rotary drilling, down-the-hole drilling and drilling with a bored pile grab. The appropriate method is chosen in accordance with the prevalent soil conditions or depending on the required depth and/or diameter of the drilled hole. Kelly Drilling As the most common drilling method, Kelly drilling is suitable for almost all types of soil and rock. Relatively short...

Double Rotary Drilling For this method the casing and auger (inside the casing) are simultaneously inserted and subsequently extracted. It is used for the production of cast-in-place piles and for pre-drilling. Down-the-Hole Drilling DTH drilling involves a hammer that is activated through compressed air and driven into the ground simultaneously rotating and impacting. A flushing current conveys the loosened drill cuttings to the surface. This method is mainly applied for rock and/or for penetrating large boulders. Drilling with Bored Pile Grab This common drilling method loosens the soil either...

Pile Driving Methods With pile driving, so-called piling elements are installed in the ground and extracted again. Common piling elements include steel profiles and piles made of reinforced concrete or timber. Nowadays, mainly sheet pile walls for supporting or securing purposes as well as foundation piles or cut-off walls are produced using the various pile driving methods. The erection of quay facilities in port construction presents difficult conditions and requires particularly heavy piling work with long piling elements. For this purpose, mainly powerful duty cycle crawler cranes with lattice...

Vibrating The noise and vibration levels of this method are especially low, which makes vibrating particularly suitable for work in heavily built-up areas. Thereby the piling element is set into harmonious oscillation. Thanks to the weight of the vibrator and pushing with the help of the crowd system, the piling element can be installed in the ground. Solutions for Deep Foundation Work

Slurry Wall Installation Slurry walls are wall structures, which are installed deep into the ground and made of concrete, reinforced concrete or binding agents. They have a static or sealing function. For their production, trenches are modularly excavated and support fluid, usually bentonite suspension, prevents the soil around the trenches from caving in. In the single phase method a self-hardening suspension remains in the trench. In the twophase method the support fluid is pumped out of the trench and replaced, for example by concrete, after the final depth has been reached. In the combined method,...

Hydraulic Slurry Wall Grabs Hydraulic grabs are opened and closed via hydraulic cylinders, which facilitate extremely high closing forces. They can additionally be fitted with flexible guiding strips on the grab frame which allow to align the grab within the trench. Hydromills Slurry wall hydromills are suitable for great depths and particularly when very hard soil conditions prevail. In the process the soil is loosened and crushed by a cutter head on the lower end of the guide frame. The loosened material is continuously pumped to the surface in the support fluid. Solutions for Deep Foundation...

Soil Improvement This process involves the stabilization of the soil on the jobsite through treatment and/or the addition of other materials. A number of methods are available for this purpose. Soil improvement means changing the natural properties of the soil with a view to meeting the constructional requirements of the jobsite. The natural load-bearing capacity of the ground to support construction loads is enhanced and/ or the compressibility (settlement) of the ground is reduced. Soil improvement allows for the installation of several different products. These include various types of columns,...

Wet Soil Mixing For wet soil mixing the mixing tools rotate around the vertical axis of the mixing shaft. The tools break up the soil matrix and mix the suspension with the soil. The binding agents used are cement types mixed to a suspension by adding water. Cutter Soil Mixing This method involves rotating drums that break up the soil structure. Simultaneously a self-hardening binding agent suspension is added. The drums of the mixing tool rotate around the horizontal axis so producing soil mixing elements with a rectangular cross-section. Impact Compaction A heavy tamper weight is dropped from...

Drilling Rigs LB Series Multiple Applications The drilling rigs of the LB series are suitable for a wide range of applications in the deep foundation industry. In addition to the popular Kelly drilling method, they are also commonly applied for tasks using a continuous flight auger, full displacement tools, and a double rotary head. Down-the-hole drilling is an exceptionally popular method when working in hard soils or rock. Solutions for Deep Foundation Work

Successful on the Market Since 2007 Flexible Application on the Jobsite Liebherr presented its first drilling rig, namely the LB 28-320, at the Bauma 2007. Today, the LB series consists of six models with torques between 180 and 510 kNm. Depending on the application, drilling depths down to 95 metres and drilling diameters up to 3,000 millimetres are possible. The drilling rigs from Liebherr are available in different configurations and are highly flexible in their application according to the prevailing soil conditions. Additional equipment is available as an option for drilled piles with very...