Demanding groundwater reduction, Grand Hotel Titlis Palace

Marti Ag

Engelberg, Switzerland

An exclusive luxury hotel is being completely renovated in the historical city center of Engelberg, Switzerland. During the construction phase, specialists of Marti AG, Bern are ensuring dry construction pit and robust foundation of the adjacent building with the help of level-controlled pump operation.
Engelberg and its Titlis region belong to the tourist heavyweights of Switzerland. Thanks to a Chinese investor, a new 5-star hotel is being built here, the Grand Hotel Titlis Palace. The construction running into 100 million CHF with 117 rooms and a large spa and wellness center is meant to be completed in December 2018.

Only for professionals
To ensure the ongoing underground work, Marti AG, Bern is operating a computer-monitored groundwater reduction system. A five-member team is busy keeping the construction pit dry round the clock and seven days a week. The groundwater level is being balanced out within the specified reference values so that no damage caused by cracks occurs in the adjacent buildings. Jochen Rudath, groundwater reduction specialist at Marti, calls the local conditions extraordinary: "The ground water flow is extremely inconsistent. Massive storms, snow-melts and the hydro-geological underground conditions pose a great challenge to us. On peak days, the system extracts up to 50,000 liters of water per minute. In the other extreme case, we have to pump back plenty of water into the underground in order to be able to maintain the necessary pressure."

Top equipment
In the process, what is indispensable is the quality of the equipment, explains Ernesto Valguarnera, construction leader and Project Manager for special civil engineering at Marti AG, Bern. "Recently, there was a power outage caused by a strike of lightning. Without the immediate starting up of the emergency generator, the entire construction pit would have been standing in water within a few minutes." The team demands the same, uncompromising reliability from the submersible pumps. Submerged at a depth of 19 meters, up to forty Grindex pumps are deployed continuously day and night. "I work only with Grindex" emphasizes Valguerna. "The high-quality Swedish pumps have also operated without any failures here in Engelberg so far and have already extracted more than 12 million cubic meters of water since February until June this year".
A maximum current capacity of 700 amperes is available to the complex extraction system. The extremely low power consumption of the Grindex pumps enables optimal design of the complete installation in the process. With the large number of pumps and the period of deployment spanning several months, the high level of energy efficiency pays for itself in every respect.

55-year partnership
Grindex manufactures submersible pumps for drainage, sludge, slurry and corrosive liquids. The pumps are convincing with their absolute dry running safety, monitoring of phase, voltage and direction of rotation, and high resistance to wear and tear. The use of first-class materials is the reason for long service life and high efficiency of the devices.
Thanks to a large warehouse as well as a wide range of pumps on hire, Probst Maveg is offering prompt and flexible solutions since 1962 for water handling at any construction site.

Detailed information:
Probst Maveg AG
Lyss / Crissier


Jochen Rudath and Ernesto Valguarnera, the specialists for groundwater reductions at Marti AG, Bern, use only submersible pumps – more than 40 of them in Engelberg alone.