Sunniberg Bridge

The Klosters bypass is a subproject of the expansion of national highway 28 in Prättigau (Canton Graubünden). West includes the Klosters bypass to the bypass Saas, by-passing Kublis to follow in 2016. To the east is the continuation of the direction of Davos or the RhB - car loading Selfranga on Vereina railway tunnel. The purpose of the bypass routes in Prättigau is to relieve the towns along the main road from annoying Highway, which prevails especially in the peak season in winter. An important role is also played by the now year-round existing connection from the Grisons lowlands to the Engadine. Since the opening of Vereinatunnel the road is further affected by the valley of the country Quart. Before the opening of the bypass, there was likewise through traffic to the Engadin, but over the Flüelapass at Davos, who was only with great effort to drive safely in winter.

Connection Klosters

The Klosters bypass begins shortly after the roundabout of Mezzaselva in which the Serneuserstrasse - the Serneus village and Serneus bathroom opens up - branches off from the main road. It follows the half- port village of Klosters. The new bypass road runs straight and pass under the underpass Buel the turning lane to Klosters and the railway line of the Rhaetian Railway.

Sunnibergbrücke

The Sunnibergbrücke starts behind the half- connection Klosters Dorf at Buel and ends at the west portal of the Gotschnatunnels, the so-called Drostobel. In between, it spans the valley of the country quart for a distance of 526 meters in a right turn. For this reason, the bridge towards the village down the valley lying Serneus is slightly inclined. Contents is the cable-stayed bridge, which consists of reinforced concrete and prestressed concrete, steel cables stretched over the four pylons. (Seen from Buel off) At the level of the second pylon is reached the highest point of the bridge, as it is where the road about 62 meters above the land Quart, the flows near the bridge pier on the valley floor along. Each of the four pillars has a foundation that is established around 16 meters deep. The carriageway was simultaneously made ​​by a pillar, starting on both sides using the free cantilever technology direction field center. The carrying cables run in harp arrangement of the anchorages in the deck over the roadway to the protruding pillar ends. The bridge runs in a gentle slope towards the bridge end Drosstobel. She has a radius of 503 meters in plan. This allows zwängungsarme deformation due to temperature and concrete creep and a waiver of expansion joints and bridge bearings. The two lanes - the uphill direction leading Davos or Engadine, the talwärtsführende direction Kublis and country Quart - are each 3.50 meters wide and therefore suitable for the heavy traffic on the RhB - car loading Vereina.

The construction was started in the spring of 1996. After the completion of the bridge until the opening of Klosters bypass was initially a site entrance to the portal Drosstobel of Gotschnatunnels.

The bridge has become a new landmark of Klosters. In 2001, even before its opening, the building, designed by engineer Christian Menn in collaboration with Dialma Jakob Bänziger and his engineering firm, due to the unique design of the prestigious international " Outstanding Structure Award" from the International Association for Bridge and Structural Engineering was ( IABSE ) awarded a plaque on the road boundary recalled.

The cost of Sunnibergbrücke amounted to about 30 million Swiss francs.

On 9 December 2005, the Klosters bypass were handed over to the Sunnibergbrücke and the Gotschnatunnel circulation. The opening ceremony took Prince Charles part as guest of honor. He spends his regular skiing holiday in Klosters.

Gotschnatunnel

After a short passage you are driving along the road through the western tunnel portal Drosstobel the approximately 4.2 kilometer Gotschnatunnel passing underneath the Gotschnagrat. First, the road passes a slight curve to the left, then followed by a long, straight piece of track. From here on, the emergency gallery runs in 30 meters distance from the main tunnel on the mountain side parallel to the roadway. All 300 meters there is a doorway through which one can switch from road tunnel for emergency gallery. Compared to the emergency exits located on the side facing the monastery every 150 meters an emergency niche. Supply and exhaust air are passed through the ceiling. The Gotschnatunnel is supplied from both ends of the tunnel with fresh air. Light signals every 150 meters give information about the state of the tunnel, the road or the traffic situation. In addition, also be located every 250 meters CO2 measuring devices in the tunnel, all 140 meters hydrants. The road is like on the Sunnibergbrücke also two lanes, each track also has a width of 3.50 meters.

The Gotschnatunnel was driven by both sides in the drilling and blasting. When viewed 3,370 km tunnel from the west portal is the point at which on 10 December 2001 took place the punch. Not far from this point begins another curve to the left, however, is narrower than that near the Drosstobel. At the end of the curve is the east portal Selfranga.

The construction of the escape tunnel was started after completion of the main drift in October 2003 because he was only included in the planning afterwards. In contrast to the main gallery here came a tunnel boring machine used. They milled from Drostobel from uphill direction Selfranga. Then was the breakthrough on 30 March 2004. During the construction of the safety gallery of interior construction of the road tunnel was carried out.

The Gotschna road tunnel was completed in 8 years of construction, with four years accounted for the outbreak and another 4 years in the interior design and the electrical equipment. It cost around 211 million Swiss francs.

Connection Klosters- Selfranga

The eastern portal of Gotschnatunnels comes close to the site of the loading station Selfranga back to the surface. The main road 28 runs first in a left curve, then a short road bridge and in another, but steep left turn direction Davos. From the main road, the access road branches off to the waiting room of the car loading to the left, the road to the monastery branches off to the right.