Lankelma Limited products

Lankelma have three fully tracked rigs, our rubber tracked ‘bog skipper’ rig, our steel tracked box rig and our latest addition to the fleet, our hybrid plug-in electric crawler.

Lankelma’s four track-truck mounted rigs provide CPT services nationwide. These rigs are are self-contained HGVs capable of being jacked up on their tracks to cope with soft or uneven ground on site.

Lankelma owns the world’s first dedicated CPT rail truck that can test within the rails four-foot or six-foot, and an excavator mounted unit that test in the cess, four-foot and six-foot.

The piezocone test (CPTu) is a cone penetrometer deployed during a CPT which simultaneously measures cone tip and friction sleeve resistance, inclination and excess pore water pressure. The addition of pore water pressure measurements allows for a more reliable determination of soil stratification and soil type than standard CPT (cone tip and sleeve resistance only). This provides a better basis for interpretation in terms of mechanical soil properties.

The Monster Steek Apparaat (MOSTAP) soil sampler, roughly translated as Sample Stick Apparatus, is a 65 mm diameter sampler consisting of a cone with a cutting shoe at the base (0.2 m length), connected to a sample tube (1 m length). The MOSTAP allows the recovery of high quality, continuous and undisturbed soil samples 1.2 m in total length from discrete depths at each test location.

Lankelma’s insitu bladder pump water sampler allows for a groundwater sample to be taken using CPT equipment in as little as an hour. When compared with conventional water sampling in boreholes, our CPT push water sampler is not only faster but also cost-effective.

Inclinometer systems are used to monitor deformation in the ground. The technique involves installing plastic inclinometer casing in a near vertical borehole that passes through a zone of suspected movement, with the bottom of the casing anchored in stable ground. The inclinometer probe is then used to measure movement of the casing from its original position over time and hence measure any ground movement.

Standpipe piezometers are a simple, reliable and relatively inexpensive way of monitoring the piezometric water level over time. They typically consist of a porous tip at its lowest point and riser pipes that connect the tip to the surface, although porous pipes can also be connected to the riser pipes if certain beds are of interest.

The Vibrating Wire Piezometer (VWP) uses a vibrating wire pressure transducer to accurately measure the pore water pressure of the ground by responding to changes in water pressure. This installation is suitable for use in all soil types, with the readings obtained either by a read-out, terminal unit or data logger.

Lankelma’s C-5 Jack-Up Platform Sandpiper allows geotechnical drilling, borehole investigation and CPT testing in waters up to 15m depth. The 18m by 12m platform is modular, allowing it to be transported by road, with the pontoons assembled on site using a simple coupling system. This makes it ideal for easy handling and assembly in remote locations, where conventional equipment cannot be used.