Piling Rigs evolve with the new Soilmec SR-45 MP
The brand-new SR-45 MP is the evolution of two of Soilmec’s well know models: the CM-40 JM and the R-312/200 MP. These historical models have already been appreciated in numerous and demanding projects, including the Diavik mine in Canada, the DomAquarée in Berlin, and the Anse du Portier in Monaco.
The SR-45 base machine grants solid and powerful support. A large Diesel engine is capable of generously feeding the drilling group and the mast, whose design is derived from previous models, which is characterized by the possibility of exploiting a very long stroke and the special technological kits.
The power needs are entrusted to a latest generation Cummins B6.7 engine, boasting high performance, up to 209 kW. Compliant with Stage V regulations, the engine is also fitted with the “start and slow” system and the automatic radiator control system, for better combustion and cooling efficiency, resulting in a reduction in consumption and noise pollution.
The Soilmec “H-Cab” cabin offers a comfortable and ergonomic workplace, is fitted with a sliding door and large windscreens, air conditioning system, automotive seat with lumbar support, camera control system complete with dedicated 7″ multiscreen screen and the adjustable touchscreen DMS monitor.
The controls in the cab allow the assembly manoeuvres on jobsite, turret rotation, tramming and pile positioning. The machine also features one radio control dedicated to unloading/loading onto trucks and another radio control, complete with monitor, for drilling, rods assembly and handling, rotary and kinematic mechanism.
The mast is connected through the parallelogram system which allows a quick set-up of the rig and a simple pile positioning. It is designed to support vertical micropiles and Jet Grouting, for which it can be provided also with a lattice booms extension.
The drilling performances are entrusted to an HT-3700 rotary head with a torque value of 3661 daNm, a rotation speed of 122 rpm and a lateral cradle slide of 600 mm. The 15 m rotary stroke allows to install a long rods battery directly under the rotary, the crowd system has a force of 237 kN and the rods loader is capable of easily handling 2 rods up to 14 m long.
The Jet-Grouting version offers the maximum technological performance for this model, allowing to execute very deep columns in a single treatment passage, guaranteeing a better grouting result and a higher production. The SR-45 MP offers three possible setups using the lattice booms extension capable of reaching a jet treatment depth between 31.5 m and 34.7 m in a single passage. Furthermore, thanks to the two-rod loaders it is possible to reach the remarkable maximum depth of 62.7 m.
Soilmec’s sustainable approach
Soilmec has a long-standing commitment to sustainability, to protect the health and safety of all those who work with us and live in the communities where we operate.
The SM-13e represents the first step of a range of electrified Soilmec machines, what we call e-tech, zero-emission. A new line of machines, from micropiles, piles and cranes, which responds to the increasingly frequent demands of the market in terms of reducing polluted and acoustic emissions, increasing efficiency and reducing operating costs (maintenance costs reduced by over 50% compared to an equivalent endothermic machine). It is no longer a simple “engine replacement” where the diesel engine is replaced by an electric motor, but a real electric rig in which the main drilling functions (rotary and crowd system) have been electrified, using electric motors with control inverters instead of hydraulic motors.
The SM-13e features 4 synchronous permanent magnet motors. Two motors are installed on the rotary head, another one in the crowd system and the latest set inside the base machine to feed the pump that powers the remaining non-electrified functions: undercarriage, kinematic mechanism, and clamp & breaker group.
The machine’s electrical power needs can be satisfied in different ways. Wired (Plug-In), via battery (Full Battery – unplugged) or using both solutions. The cable configuration requires a constant electrical supply, which is the simplest and cheaper solution but places limits on movements and distances on the job site. The batteries are LFP (lithium-iron-phosphate) type, rechargeable, and offer the performance of an electric rig with the same “freedom of movement” as the Diesel version.
The battery pack allows working with high performance for more than 4 hours and can be fast charged in 1 hour and 40’, using an external charging station.
Removing the battery pack is easier with Soilmec’s innovative system and no additional external means are required for this operation (Patent-pending on battery swapping).
The machine equipped with two batteries guarantees a 24/7 operational solution, without any interruption and the replacement of the battery pack can be made during shift changing, end of the shift, or during lunch break.
The SM-13e has an additional auxiliary battery which allows 1h extra operating time to comfortably carry out the battery swapping and to avoid any machine main battery downtime.
Permanent magnet electric motors have several advantages, such as high efficiency and superior performance thanks to the constant availability of the full torque regardless of speed, characteristic of the electric motors. Furthermore, when the rig is working but the manoeuvres are not active the electric motors are turned off with benefit in maintenance and significantly reducing noise pollution and energy consumption.
Particularly in periodic maintenance, it is possible to check the operating time of the single motor and manage the maintenance intervals on the actual time of use, neglecting all periods of inactivity.
The SM-13e has been designed with 3 operative modes: Normal, Eco (elongated battery life), and Boost (increased performances).
Normal mode is set to standard operating performance, while Eco mode saves energy when less power is required and extends battery life. Boost mode ensures maximum performance for short periods of time.
The machine is equipped with the new DMS On Board developed specifically for the e-Tech line that shows at a glance torque and rotational speed, traction force and speed and the drilling specifications. Moreover, the new KPIs can guarantee easier control of the machine’s performance, not only in terms of total energy consumed but also in terms of CO2 saved, both cumulative and specific, calculated from the start of the work in the job site or during the working day.
