Road - the Introduction
underground highway
of a serious shortage of urban land resources and transport significant expansion, traffic congestion is prevalent in large cities in China. large city should increase its efforts to build urban centers and the edge of the group of fast road system, "underground road" is both to ensure the speed, not occupy the best choice for urban space.
the Japanese Ministry of Land, Infrastructure and Transport Minister Ogi beginning of this year announced that it will be debated for 30 years of Tokyo Du outer ring of high-frame highway construction program, modify the large depth of the underground highway construction program, will be built is the world's first underground highway. Japanese experts believe that the construction underground highway "does not exist in the technical aspects, because the tunnel construction technology is quite mature. In some cities, due to the geological structure is relatively simple, the difficulty of the construction of the underground highway" is even lower than the construction of undersea tunnel or highway tunnel
Undergroundroad "both to ensure the speed, not the best choice to occupy urban space.
now many major cities continue to build the elevated road, elevated road there are some drawbacks, such as vibration, noise, pollution and other foreign cities, in addition to the subway, still in development "underground highway in Boston, USA from 1995 began to dismantle the urban elevated road built in the 1950s in favor of the development of the underground highway." underground road "for sustainable development, the eco-city." underground Highway vehicle emissions focused high-altitude emissions treatment, to enable Boston, carbon monoxide is reduced by 12%, In addition, removing the viaduct on the ground do boulevard, to increase the green area.
in the Tokyo capital Rail Link "Yamanote Line" about 40 meters underground, being a two-way four-lane highway construction, which is Japan's first underground highway from Kumano-cho, Itabashi Ward, Tokyo, Meguro-ku, Aoba Taiwan 11 km in length, Ikebukuro, Shinjuku and Shibuya three important commercial center, opened in 2007. preparedness Bureau of the Tokyo Miyakonojo City Speedway Director of the Village is say so, this is known as the Tokyo central ring Shinjuku Line underground highway a total investment of 1 trillion yen (about $ 90 billion) of six entrances, half-way after the opening from Ikebukuro via Shinjuku to Shibuya, the time required can be reduced from the current 50 minutes to 20 minutes, can effectively alleviate traffic congestion in urban areas, and also reduce environmental pollution.
Dongcheng District as part of the old Imperial City in Beijing, ground and underground cultural relics are very many places retain old Beijing hutongs, courtyard style, but with the development of economic and road traffic, driving hard, parking is difficult to become a "heart disease" in the Dongcheng District. Dongcheng District will research programs under the "Research Report", underground car park under the alley, connectivity, Lama Temple and the Dongdan underground road.
in Nanjing, inner underground The road has been put into use; Shanghai's Bund road to convert the entire ground, and will use to vehicular traffic on the ground.
, experts pointed out that Japan built the underground highway "did not say it's intention is that national defense construction. Tokyo is a city had been air strikes, "underground highway is completed, will form a 20 km long, 26 meters wide and a huge underground space, plus subways, tunnels and underground space had been built, has been basically hold All of Tokyo's population.
the United States in Boston on the stroke of a pen, removal of the elevated highway and replace it with underground "tunnel" underground highway project in Boston known as America's most complex, spent the most highway projects. this "tunnel" was completed by the end of 2007, the city main road in the ground, but suffered due to the construction of the tunnel leaks, traffic jams and other problems, design and construction of which lasted 26 , thereforeWorld Steel Pipe , the project cost soared from 2.6 billion to $ 14.8 billion, which attracted enormous controversy in the United States. Nevertheless, after the completion of the project, local transportation more convenient amenity is also greatly improved.
underground highway - Benefits the
underground roads cost may not be high
In addition to Boston, some cities in the United States, Japan, Russia and other countries plan to develop "underground road
in one fell swoop have to take into account the environmental defense
Japan aspects of estimation, compared with the elevated road on the ground, with large depth of the underground highway, residents along the noise and exhaust from high-speed traffic generated specific to Japan Tokyo Prefecture outer ring, the "underground highway" per kilometer construction cost savings of 20-30% than the high shelf on the ground, set in the tunnel ventilation station, can be "underground highway vehicle exhaust particulate matter and other harmful substances to filter and decompose, emit high-tech processing, almost non-polluting gas.
, 2004-2005, Beijing is planning to solve the traffic problems of the 'four vertical and two horizontal' underground road network. The "four vertical and two horizontal" refers to the two north-south underground expressway to the west side was built in Beijing to ease the traffic pressure of the West Second Ring Road, West Third Ring RoadWorld Steel Pipe , Financial Street, Zhongguancun, the long-distance traffic corridors in the East side of the building of two north-south underground expressway, ease traffic pressure in the East Second Ring Road, East Third Ring Road, at the same time providing long-distance travel services such as the CBD, Wangjing area. Chang An Avenue and south sides of the construction of an east-west underground roads, to ease the traffic pressure in the north and south of Second, Third and Chang'an Avenue. this six underground channel is not connected with each other through contact with the ground entrances and ground of the road system.
underground crash rescue is hard
but underground highway "the biggest problem is how quickly handling a traffic accident or vehicle fire rescue in the closed state because the underground highway, rescue personnel difficult to reach the scene immediately. However, the construction of an underground highway parallel to the emergency channel, and separated by a certain distance and the "underground highway" connection, you can basically solve the deal with the accident and rescue issues.
- of domestic
Beijing Dongcheng District will build underground roads to solve traffic congestion problems, the Lama Temple to the east a single line may be in the vanguard 2010 January 12, a copy of Dongcheng District underground space development and utilization of research report "in the Dongcheng District Political Consultative Conference some of the public.
Beijing, Shanghai's per capita GDP has more than $ 10,000, fully capable of developing underground space. very high because the cost of underground space development, require the city's financial ability to reach a certain level and the geological conditions are very suitable for the development of underground space. are of the Beijing underground rock structure, and the groundwater level is deep, the construction of deep underground space completely no problem.
underground Road - the foreign
based on international experience, a country's per capita GDP of more than 1000 U.S. dollars can start the urban rail transportation, $ 3,000 is the period of rapid development of urban rail transit; and more than the $ 10,000 to the period of rapid development of underground space.
, November 11, 2002, Singapore launched a up to S $ 1.8 billion for road works in this road Liang Qianling seven years after the completion of the Southeast Asia's longest underground road. Singapore Transport Minister Yeo Cheow Tong said that this road is 12 kilometers in length, from Kallang to Paya, including up to nine kilometers of road sections built under the ground. the contractor responsible for construction projects from Japan, Korea and Singapore in order not to affect the landscape, part of the underground highway and through a river, so during the construction of river will be diverted.