The Austrian road safety legislation requires formal approval of new tunnels as well as tunnel rehabilitation projects by the ministry of transport, infrastructure and technology.
Approval is required for the basic design (STSG §7) as well as the final design prior to commissioning (STSG §8).
In this regard and on behalf of the ministry, Lombardi SA has been mandated to establish safety expertises regarding the following tunnel objects:
- Tunnel chain Klaus
- Kaisermühlen Tunnel
- Liefering Tunnel
|Agua Negra Tunnel||References_187|
The Agua Negra tunnel is the main component of the "Bioceanic Corridor", an international project aimed to set an efficient roadway crossing through the Andes Cordillera, connecting Porto Coquimbo (Chile) to Porto Alegre (Brazil).
The project includes the construction of a 13.9 km long twin tunnel, linking the two portals at 4'080 m a.s.l. (Argentina) and 3'605 m a.s.l. (Chile). The tunnel is provided with cross passages every 250 m, two ventilation caverns (one provided with a vertical ventilation shaft of 500 m, the other with a 4.5 km long ventilation tunnel). The project includes also the ramps and the control building. The cross section is horse-shoe shaped and the carriage way is two lane wide, with a free section 7.50 m wide and 4.80 m high. There are walk ways on both sides. According to the concept for a longitudinal ventilation, the tunnel is not provided with an intermediate slab.
The construction concept is to excavate the tunnel from both portals, with two contemporary and independent excavation faces each. The excavation will be drill & blast in order to assure the maximum adaptability to the geological conditions.
Particular aspects of the project are the high elevation of the portals, the distance to the nearest urban center (>200 km), the extreme meteorological conditions in terms of wind and thermal excursion and the high seismic risk.
Lombardi is responsible of the new conceptual study, the preliminary project and the technical tender documentations for the underground and external civil works as well as for the electromechanical equipment.
|N02 - 120093 - Belchen Second repair BZI 2.0||References_7659|
The Belchen Tunnel on the A2 motor highway between Basel and Egerkingen crosses the Jura Mountains. The bedrock contains parts called Gipskeuper, a rock mass comprising anhydrite, hence causing damage to the existing tunnel lining due to rock swelling processes. Severe damages require rehabilitation of the two, dual carriageways tunnels.
The essential measures include:
- Extensive repair of the two tubes (including replacement of the invert arch,
renovation of the arched ceiling incl. securing its bedding, replacement of the
intermediate ceiling, refurbishment of the underground control centers,
adjustments to the ventilation system, to the drainage and other operational
and electromechanical equipment, etc.);
- New, additional cross passages between the two tubes;
- Filling of the existing shafts and dismantling of their cover structures;
- Installation sites South and Logistics Area North.
Lombardi is very pleased to execute the mandate of project author civil works for the phases project of intervention/detailed project, tender, construction drawings, execution/commissioning in the same JV as the previous phases.
The implementation of some "bridging measures" in the middle tube (1st step) is expected to take place in 2021 and 2022, while the repair of the tube towards Basel is planned to take place from 2023 to 2027. This will be followed by the 2nd step of the repair in the middle tube.
Rehabilitation of two double-lane tunnels, each 3.18 km long, dating from the 1960s. Replacement of the invert arch in swelling Gipskeuper and Opalinus clay. Replacement of the intermediate ceiling. Decommissioning and backfilling of 3 ventilation shafts, each over 100 m high. New construction of cross passages. Reconstruction of the 3 underground control centers, ventilation, MEP.
|New Axen Road N4||References_110|
In the course of the completion of the national road network, the missing link between Ingenbohl and Gumpisch along Urner Lake will have to be realized.
The core of the N4 New Axen Road consists of the bi-directional two-track Sisikon and Morschach Tunnels. The Morschach Tunnel is approx. 2.9 km long and is excavated by drill-and-blast from Ingenbohl. The Sisikon Tunnel is approx. 4.4 km long and is, due to the space restrictions in both portal areas, mostly excavated by drill-and-blast from the access at Dorni.
The tunnels are mostly driven through stable lime rock formations, structurally more unfavorable conditions with Palfris marl are expected only in the region of the Riemenstald Valley. Ventilation stations will be built on each portal.
Lombardi Ltd. is working for this project in a consortium called “INGE Axen”.
The services include the sections tunnel construction as well as the technical overall direction of the project with the following scope of performance:
- Technical coordination between the planners and the specialists;
- Design of the main project, detailed project and preparation of the bidding
- Preparation of documents for the implementation.
|N02 Second tube Gotthard road tunnel - BIM Pilot Project||References_7696|
The existing Gotthard road tunnel with a length of 16.9 km ensures the crossing of the Swiss Alps via highway N02 between the municipalities of Göschenen in the north and Airolo in the south since 1980. This highway represents an important link between northern and southern Europe.
In order to avoid the interruption of this important connection, the Swiss Federal Council has decided the construction of a second tube and, after transferring the traffic into the new tube, to rehabilitate the first tube. The project should be implemented without generating an increase in traffic capacity: after the rehabilitation, both tubes are to be operated single lane with hard shoulder.
The client, FEDRO, launched a BIM pilot project as part of the detailed project phase. The focus is on the BIM use cases of model-based planning, coordination and communication. The BIM pilot project provides the BIM Modeling of a 120 m long tunnel section in the Hospental area, including the 2nd tube, the cross passage to the existing service and safety tunnel (SISto), the existing first tube and one SOS niche. Furthermore, the BIM pilot project includes the modeling of Monte Prosa ventilation cavern (LMP).
The design of LMP ventilation cavern is entirely based on a BIM model and the coordination between all designers is model based. Elements properties and project data are defined as attributes inside the model.
The entire design of the LMP is made with the BIM software Autodesk Revit. The model has been divided into several models according to the different disciplines: structural, ventilation, drainage, electrical and plumbing model.
The project planning has been regulated by a BIM Execution Plan (BEP). It represents the main document that defines goals of the BIM applications, roles and responsibilities and regulates the collaboration and coordination of all the stakeholders involved in the project.
|N02 Second tube Gotthard road tunnel - civil works||References_6745|
|Southwest bypass Sins||References_4668|
The South-West-Bypass Sins in the south of Canton Aargau should relieve the heavily polluted city centre and its access roads from the high level of traffic (more than 25’000 vehicles per day). Along the local transit road, the limit values of the noise protection regulation are exceeded. Likewise, the pollution levels are close to and sometimes exceeding the maximum emission values.
From North to South, the general project South-West-Bypass Sins comprises the roundabout North, (diameter approx. 40 m), the almost 70 m long Bachtal bridge, the connecting 912 m long cut-and cover tunnel including ventilation center and several escape routes, the 40 m long Schürmatt bicycle- and pedestrian overpass as well as the roundabout South (diameter approx. 40 m).
The adjustment and upgrading of the Aargauer Road K 124, which should be handed over from the Canton Aargau to the Municipality of Sins in good condition, represents another component of the project of the South-West-Bypass Sins.
Lombardi manages the general planning team which realizes not only the construction works, but also the entire operational and safety facilities, the ventilation, the noise protection, the design and landscape architecture as well as the traffic technology.
Construction work on the South-West-Bypass will start in March 2019 and the installation of the electromechanical equipment will take place in the first half of 2021. The opening of the bypass is planned for September 2021, before the Aarauerstrasse is renovated for about one year. The total costs amount to 88.4 million CHF.
Commissioned in 1974, the Vennes-Chexbres section of the N09 highway is subject to major maintenance works. In addition, to overcome the difficulties caused by the traffic overload of the section, it is planned to implement a dynamic lane that enables to use the emergency lane as a temporary traffic lane during the high traffic load periods (temporary PUN) between the junctions of Vennes and Belmont.
Lombardi SA, leader of the LIG-A JV, oversees the project management and most of the tunnel- and geotechnical studies.
The Belmont tunnel, double tube with one-way traffic (L=about 350 m), will be extended with the help of a protective cover that guarantees a separation of the construction area from the traffic space along its entire length, thus maintaining 2 lanes with reduced width (2x3.50 m) during the enlargement of the tunnel.
The construction method chosen and adapted for the Belmont tunnel is pioneering in Switzerland and represents a significant technical challenge, but also a great opportunity for the other numerous Swiss tunnels that in the coming years will have to be repaired or enlarged under traffic.
All works will be carried out under traffic (DMT of 65,000 vehicles/day) with the upkeep of the 4 lanes at peak times. This traffic management and the implementation of the PUN are associated with important civil works, including the enlargement of the Belmont tunnel and the expansion and strengthening of other structures in the section.