It is understood that Yuquan Road line will adopt straddle monorail, which is a kind of rail transit. Wu Hongjian, chairman of Beijing Rail Transit Construction Management Co., Ltd, revealed that straddle monorail is a track as its name implies, while ordinary subway is a double track.
Monorail vehicles are characterized by strong adaptability, low noise, small turning radius and very strong climbing ability. It is similar to the "small train in the air" set up by some resorts, with a speed of about 60 kilometers per hour. At the same time, the amount of demolition is also very small.
The questioning voice of "small train in the air" focuses on environmental assessment, safety and economy.
Looking at Oriental Weekly reporter Shan Sumin/Beijing Report
Last summer, residents of Guanhu Jiayuan, Sunny Shangdong, Guandu and other communities along the East Fourth Ring Road will enjoy the cool and relax in the shade of the "only green landscape avenue in the capital" next to the community. This green belt is the only welcome avenue in Beijing invested and built by the Beijing Municipal Government in 2000.
In the past two months, an article entitled &; lt； East Fourth Ring Road Project of Beijing Rail Transit &; gt； Since the public participated in the second public announcement of environmental impact assessment, it has never been idle here.
The public announcement of EIA let residents know that the "East Fourth Ring Road Project of Beijing Rail Transit" will be the first straddle-type monorail line in Beijing, with a total length of about 33.7 kilometers, all of which are viaducts. The road is just on the green belt of the East Fourth Ring Road, which is close to some residential buildings.
Another elevated monorail Yuquan line plans to set up a depot in Guogongzhuang, 62 meters away from Beijing Vanke Xihuafu, which also makes the owners of Xihuafu a little uneasy.
What are the effects?
According to the schematic diagram of the project route, the viaduct of the East Fourth Ring Road project will pass through many residential areas such as Sunny Shangdong, Dongshanshu and Guanhu Jiayuan, as well as schools, kindergartens and hospitals.
According to the simplified EIA report, the project is planned to start on 20 14 and be completed on 20 16. According to the Beijing News, Beijing Evening News and other media reports, "small trains have low noise and will not disturb the people when passing through the urban area" and "straddle monorails will not produce waste gas".
Looking at the Orient Weekly found that the small train, if completed, almost passed through the window of Building 6 16 in Bali Zhuang Xili.
Beijing Vanke Xihuafu was originally built next to the depot of Metro Line 9, and now the Guogongzhuang depot of the proposed Yuquan line of rail transit has been added nearby.
Liu Zhiyuan (a pseudonym), an expert who participated in the technical evaluation of Chongqing Monorail Line 3, told this reporter that the depot is equivalent to a train maintenance workshop, and the outdoor operation of a small depot will inevitably produce noise, light and other pollution. "It is equivalent to sandwiching the community between two factories."
As for the elevated monorail, three experts interviewed by our reporter all put forward the safety hazards that should be paid attention to-if the small train catches fire in operation, it will be difficult to rescue on the spot, and if the external rescue force cannot arrive at the scene in time, passengers will hardly have the conditions to escape on their own.
Save or waste?
The Beijing elevated monorail, which is called "the small train in the air" by the media, is planned to have one east and one west, namely the East Fourth Ring Road and Yuquan Line, and is undergoing environmental assessment.
The East Fourth Ring Road Project starts from Xiaoyun Bridge in the north, and is laid south along the green space outside the East Fourth Ring Road, passing through Yaojiayuan Road, Chaoyang Road and Sihuiqiao Community. After that, the line turns to the inside of the East Fourth Ring Road and continues to the south. It turns to the east at Sifang Bridge and ends at Universal Studios Tongzhou. The total length is about 33.7 kilometers, with 2/kloc-0 stations, and the total investment of the project is 22.95 billion yuan.
Yuquan Line is 25 kilometers long, with a total investment plan of 65.438+0.73 billion yuan, starting from the northwest corner of the intersection of Yongyinqu North Road and Liuniangfu Road, with 26.5438+0 stations including Fushouling, Shixingqiao, Tamura, Yuquan Road, Guozhuangzi and Xibaijiayao.
Wang, an academician of China Academy of Engineering, told Outlook Oriental Weekly that the elevated monorail has the advantages of less land occupation, low cost and strong climbing ability. "The cost per kilometer is about 200 million, and the operating expenses are relatively low."
The cost per kilometer of these two lines to be built in Beijing is 680 million yuan and 690 million yuan respectively, which is higher than the cost per kilometer of Daxing Line put into operation at the end of 20 10 and the first phase of Metro Line 6 put into operation in 20 12.
Zhang Ming (pseudonym), a professional architectural engineer of Lin Tongbai International Engineering Consulting Co., Ltd., once participated in the design of Chongqing "Little Train" project. He told this reporter that at present, in addition to the conventional B-type cars, the Beijing subway system will also introduce A-type cars with larger carriages and higher power requirements. If monorails are added, the complexity of construction, management and operation will increase.
Because of the short car body and different tracks, the line as a monorail cannot be unified with the current subway system. In terms of management and cost, Zhang Ming believes that monorail trains not only fail to save money, but also increase the difficulty of unified dispatching and operation.
Can the traffic pressure be alleviated?
In the interview reply provided by the Beijing Municipal Planning Commission to Outlook Oriental Weekly, the planning of the East Fourth Ring Road project in Beijing was introduced. It was said that in the construction planning for 2020, the rail transit network planning scheme was divided into three levels: the central city subway system, the medium and low volume rail transit system and the regional express line system, and the East Fourth Ring Road was one of the medium volume light rail lines.
According to the data in the simplified EIA report, the daily passenger flow is predicted to be1730,000 in the initial stage, 2190,000 in the near future and 276,000 in the long term. The initial forecast data is basically equivalent to the existing suburban lines such as changping line and Yizhuang.
Zhang Ming told this reporter that the small train capacity is small and the implementation effect is obvious in a small scope. The construction of Beijing East Fourth Ring Road and Yuquan Line is "unknown" in the world at present.
Wang also thinks that monorail is no problem as a supplementary line, but it is not suitable as a single line for network planning.
In addition to the small transportation capacity, the role of "relieving traffic pressure" is limited. The distance from Chaoyang Park Bridge to Sifang Bridge is close to 10 km, which is parallel to the planned subway 14 line, and the distance is only about 1 km. There are more than 40 bus lines around the East Fourth Ring Road.
"Under the mountainous terrain conditions, Chongqing is also vigorously developing subways instead of monorails, which is related to the fact that the capacity of small trains is not enough to meet the overall traffic demand of the city." Zhang Ming said.
Waiting for the third EIA
2065438+20041mid-October, a resident happened to see the first EIA announcement of the East Fourth Ring Road Project and found the relevant person in charge of the EIA unit Beijing Academy of Environmental Sciences. The answer was "When the second EIA announcement is made, a notice will be posted in the community, and household surveys will be conducted to solicit opinions from everyone".
Until June 12, the website of the academy of environmental sciences published the second EIA announcement, but the above communication activities with community residents were not implemented. The conclusion drawn from the simplified version of this EIA report is: "From the perspective of environmental protection, the route selection of this project is basically reasonable, the environmental protection measures are appropriate, and the project construction is basically feasible."
Since July, representatives of East Line owners have intensively visited Beijing Academy of Environmental Sciences, Planning Commission, Development and Reform Commission and other units.
Du Qiang, director of the Letters and Calls Office of the Beijing Municipal Development and Reform Commission, said when receiving the owner that the project has not yet entered the working channel of the feasibility study report and project establishment of the Planning Commission.
However, residents found that during the publicity period of the project EIA, China Bidding Network and the website of Beijing Bidding Public Service Platform had published the bidding announcements for the East Fourth Ring Road project survey, engineering foundation engineering inspection and even civil construction.
"Such a procedure is definitely not compliant." Liu Zhiyuan told this reporter.
Tian Li, the relevant person in charge of the Beijing Academy of Environmental Sciences, told the reporter of Outlook Oriental Weekly: "The second EIA needs to be posted in the community, investigated and discussed. These tasks will definitely be carried out, but the time has not yet been determined. "
Tian Li said that the simplified EIA has no specific requirements on details and depth. The environmental and noise pollution problems that the owner cares about will be covered in the third EIA report except confidential matters.
Wang Dawei, director of the EIA Department of Beijing Environmental Protection Bureau, also said that even if the EIA report is submitted to the EPA for review, there will be a publicity period of 15 days, and the public will still have the opportunity to express their opinions.
On July 22nd, the Beijing Municipal Planning Commission organized the heads of basic investment companies, environmental research institutes and other units to have a discussion with the owners' representatives. Zhou Nansen, deputy director of the Planning Commission, stressed that the project is still in the preliminary investigation stage, and it will never be officially launched without public participation and strict procedures. He also promised to regularly publish the progress information of the project, arrange special personnel to communicate with each other, and ensure the public's right to know and express.
(Original title: Should Beijing build a "small train in the air")