建造北方的威尼斯

作者：Karina Lumholt

瑞典首都斯德哥尔摩面对波罗的海，在梅拉伦湖的14个岛屿上建造。市中心旧城区的Gamla Stan是欧洲保存完好的中世纪城市之一。运河上的许多水道和桥是斯德哥尔摩的特征 - 通常称为Beauty on Wateror simplyVenice of the North.

The region is facing major challenges and the need for improved infrastructure is becoming more and more urgent. With approximately 30,000 people moving to the capital every year, equivalent to two buses full of people per day, Stockholm is currently one of the fastest growing metropolitan regions in Europe. The transport system in the capital is vulnerable because there is only one north-south connection running through this city of great cultural and natural heritage.

Going underground to bypass Stockholm’s traffic bottlenecks

The Stockholm Bypass project, or Förbifarten, is a new21公里的高速公路crossing the Swedish capital, part of the largest infrastructure projects ever made in Sweden. The planning of this 2.7-billion-Euro project commenced in 2006, preliminary construction started in 2014 and the opening is planned for 2026.

Great precautions have been taken to protect the landscape and surroundings that lie above the ground surface. To protect Stockholm’s valuable nature and historic sites, it has been decided to build approximately18 km of the total 21 km through tunnels. Under lake Mälaren the construction will have a depth of65 metres below水体。80％的人将通过拥塞费用，由政府资助为20％，但总体公用事业价值被计算出来是从由此产生的经济发展和减少的旅行时间中支付的。估计每天通过145,000辆车，通过城市的旅程将减少到15分钟。

Starting at Kungens Kurva in the south and ending at Häggvik in the north, once the Stockholm Bypass project is finished, it will be the world’s second largest tunnel built in an urban area after the Yamate Tunnel in Tokyo.

在小库尔瓦建筑物

Long-term customer of Leica Geosystems,Skanska Sverige AB, has won the 12.6-million-Euro contract for building the south entrance to the tunnel, connecting it to the E20 motorway at Kungens Kurva, the largest shopping area in Scandinavia and the busiest highway in Sweden. This high-profile project has a strong focus on security and is obliged to not slow down the traffic more than necessary.

Pontus Holmberg works as chief surveyor for Skanska Sverige at Kungens Kurva. Holmberg is managing field surveyors and the site fleet that mainly consists of drillers, excavators and dozers from different contractors, many of them equipped with machine control solutions from Leica Geosystems. Holmberg works withLeica ConXto transfer model files to the machines and the field crew working on site.

“When working with different contractors on a site like this, it is important that all are working with the latest updated files,”霍姆伯格解释说。“Leica ConX helps me to track the machines from the office and transfer files to the machine in real time so everybody is on the same page.”

在该站点上工作的Epiroc Smartroc T35 Driller配备了3D机器控制解决方案是由Leica Geosystems量身定制的Epiroc Smartroc制作的and interfaces with Epiroc’s HNS sensor system.

The drill rig follows a digitally-defined pattern to drill holes into the rock for blasting. Traffic is stopped on the two highways that go around the job site, and blasting of the rocky underground is performed every day at either 10 A.M. or 2 P.M. The blasting is done under a carpet of old truck tires that are sewn together to avoid rocks falling onto the two roads.

“Two wheel loaders are standing ready at each side to clear the roads if rocks unintentionally fall on the highways making sure that the roads are blocked for a period of time as short as possible,”explains Dana Matti, project manager at Skanska Sverige.

Staying connected

Nicklas Gustafsson, owner of the companyGranskogens Gräv, is one of the contractors working on site for one and a half years. Gustafsson uses the newLeica MCP80machine control panel on site and he is content with the improvement.“较大的屏幕更容易阅读，并且按钮得到改进，因此这是一个很大的优势，”says Gustafsson.

Gustafsson explains that it has been a difficult underground with rocks and high ground water level, and when building in the one of the busiest urban areas in Sweden it is important to have reliable technical solutions that minimise downtime.

“ Leica GeoSystems的解决方案可帮助我们与站点办公室保持联系，并确保我们有一个灵活的数据流以支持工作网站上的工作流程.I have worked with the machine control solution from Leica Geosystems on my Liebherr 926 Compact excavator for four years,” Gustafsson explains. “I am online onConXfor most of the day and receive my reference files from Pontus directly on the panel.”

Solutions from Leica Geosystems are key in the multiple stages of constructing interchanges, tunnels and temporary harbours for this big project. Machine control solutions, total stations, prisms and scanners from Leica Geosystems are some of the many products that are needed for a fast and efficient construction of projects at this scale.