When will Nanjing River Crossing Tunnel be opened to traffic?

The official statement is the end of next year, that is, the end of 20 14! ! !

Nanjing Jiangwei No.3 Road is located between the Yangtze River Bridge and Jiangwei No.7 Road, 5 kilometers away from the Yangtze River Bridge. After completion, the traffic capacity will be more than twice that of the Yangtze River Bridge.

Yesterday, the reporter of Modern Express learned that at present, the north and south lines of this "X"-shaped tunnel have stopped working and changed knives, and the opening time is expected to be postponed until the end of next year. However, the tunnel has a very fresh "bright spot" recently: the mezzanine above the Yangtze River Avenue tunnel will be built into a super-large parking lot with about 600 parking spaces in the initial stage, which will be completed by the end of this year. This design is the first in China. In the future, it can also be opened as bus interchange stations and intersections, with convenience stores and restaurants.

Building a parking lot between the tunnel and the ground will save money and benefit the people.

Weisan Road Tunnel connects Puzhu Road in the north and two river-crossing tunnels are built in the south. 1 tunnel is connected to Dinghuaimen Street after crossing the river, and connected to the "well-shaped" inner ring expressway network system in the main urban area. After crossing the river, the stocks are connected with Yang Zijiang Avenue and lead to Hexi New Town.

According to reports, according to the construction plan of Weisan Road Crossing River Tunnel, the Yangtze River Avenue section is an open-cut section with a buried depth of 14 meters, of which the tunnel is 5 meters high. After the tunnel layer is completed, the earthwork above it needs to be backfilled. "The tunnel came out from the bottom of the river and climbed slowly, forming a big mezzanine. If backfilled, it will not only require a lot of earthwork, but also cost a lot. It is better to build an underground parking lot. " Yesterday, Wang, manager of the engineering management department of Weisan Road Crossing River Construction Headquarters, revealed that the underground parking lot is 240 meters long and set above the tunnel along the Yangtze River Avenue, with more than 600 parking spaces. There are two two-lane motor vehicle entrances and exits in the underground parking lot, and one one-lane motor vehicle exit, namely Lu Heng Road entrance (see the right), transfer area entrance and Dinghuaimen Street exit.

Modern Express reporter learned that the mezzanine parking lot will complete all civil works by the end of the year, and then carry out interior facilities renovation. If there are more cars in the future, it can also be transformed into a body garage, and the parking space can be doubled.

Why is there a mezzanine parking lot only on Changjiang Avenue? Wang explained that whether it can be built depends on the terrain and the location of the mezzanine floor. If it is very long and narrow, or the surrounding roads have no parking entrances and exits, it is not suitable. At present, only the Yangtze River Avenue section meets the requirements.

Prior to this, there was almost no joint design of large traffic tunnels and underground parking lots such as river-crossing tunnels in China, and this design in Nanjing was also the first in China. According to the municipal transportation department, this mode will be vigorously promoted in future tunnels in Nanjing, and this joint design form has also been considered in the wiring project of Meizizhou River Crossing-Youth Olympic Axis Project, and the shallow underground space above the traffic tunnel will be designed as a parking lot.

There are "skylights" that won't be boring, and restaurants and convenience stores will be built.

Is the mezzanine parking lot safe? Will it be dark and airtight? Yesterday, a person in charge of the transportation department of Nanjing said that from the design point of view, it is no different from the underground parking lot, just making full use of the top floor of the tunnel as the ground of the parking lot. "There is nothing wrong with safety."

As for the light problem, the person in charge said that there is no need to worry. "Everyone is familiar with the tunnel on the east main road, with skylights, through which the sun can penetrate. The mezzanine parking lot also has such a plan. "

The reporter of Modern Express learned that the function of this mezzanine is not only parking, but also bus transfer and crossing the street. For example, 400 meters to the east of the parking lot is Dinghuaimen Street Station of Metro Line 9. Jiangbei to Jiangnan needs to transfer to public transport and need temporary parking.

In addition, the person in charge said that this mezzanine will be equipped with convenience stores and restaurants in the future. You can park or have a rest.

According to reports, there will be a cover above the parking lot, and they will also build a central green space on it, with landscape flower ponds and leisure seats.

The parking lot will be completed by the end of the year, and the charging scheme has not yet been decided.

In August and September this year, the Design Scheme of Parking Lot with Cut-off Floor in Weisan Road Tunnel was released.

Why do you suddenly have this plan? The transportation department said that during the holidays, Changjiang Avenue will be "occupied" by vehicles going to the Greening Expo and become a parking lot. At present, more than ten kilometers of riverside scenery belt has also been formed. "But there is no parking lot near here. At the same time, considering that there are 14 old communities built in the 1980 s and 1990 s, such as Fangxiyuan, on the east side of the intersection of Dinghuaimen Street and Yang Zijiang Avenue, there is no supporting underground parking lot, so this plan has been formulated, which can effectively solve the parking problem of citizens. "

At present, the project has started and is expected to be completed by the end of the year. How much will that cost? According to relevant sources, it has not been considered yet, so let's build it first.

It is expected that the north-south line will be shut down and open to traffic by the end of next year.

Weisan Road Tunnel has always attracted much attention because it is close to the Yangtze River Bridge. Yesterday, it was reported on the Internet that both lines were out of service. He said with concern: Is something wrong?

Yesterday, the reporter of Modern Express learned that the two lines of the tunnel were progressing smoothly, and all of them were excavated to the bottom of the river at about 1/3. "This is the most difficult place to reach the bottom of the river. Rock layers and gravel layers are interlaced, and the geology is very complicated. Some are hard and some are soft. " According to the person in charge of the project, this kind of geology has seriously worn the shield blades. At present, both lines are changing knives, and it has lasted for a long time. According to reports, the south line is expected to resume excavation at 1 1, and the north line is around 65438+2.

Why does it take longer to change knives? The person in charge explained that a high-pressure cabin was connected behind the cutter head of the shield machine. The main function of the high pressure chamber is to keep the earth pressure balance in the shield machine, otherwise the front end of the shield machine will be squashed by the forward resistance. The pressure is as high as 6 kg/cm2, which is equivalent to adding 6 kg to a fingernail. When changing tools, the operator must enter the hyperbaric chamber, and domestic technicians have only worked in the pressure environment of 4.3 kg/cm2 at most, so the tool changing is still operated by German divers.

The relevant person in charge said that it takes about 30 minutes to gradually pressurize the diver before entering the hyperbaric oxygen chamber. After working in the cabin for 48 minutes, he must stop working and return, and then gradually decompress for more than 3 hours before he can walk out of the studio. This is because if the human body suddenly returns to the outside space from the hyperbaric oxygen chamber, it is likely that the blood vessels will rupture and die. "The real operation time is actually only about 20 minutes, and one person can operate at most once a day, which is why it is very time-consuming to change tools." According to reports, at present, * * * four people take turns changing knives.

It is understood that the opening time of the tunnel has also been adjusted. It will not be open to traffic before the Youth Olympic Games, and it is expected to be open to traffic at the end of next year.

Whether to charge for building a toll station in Jiangbei has not been decided.

After the opening of Weisan Road Tunnel, the distance from the main city to Pukou will be greatly shortened. From now on, it only takes about 20 minutes from downtown to Dingshan Town via Dinghuaimen Street, and it only takes half an hour to reach Pearl Spring Scenic Area.

However, Weisan Road Crossing River Tunnel has the same toll station as Wei Qi Road Crossing River Tunnel. The station is located in the main line of Jiangbei, south of Puzhu Road. Whether or not to charge, there is no statement at present. According to relevant sources, it is still under consideration. "The toll station is built first, whether it is used or not, and how to use it has not yet been decided."