A Rail Transit Line 1 tunnel through
- Details
- Category: Ningbo News
- Published: Thursday, 21 June 2012 09:56
▲ line look Chunqiao station laying site
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Source 2012-6-21 9:01:17 Ningbo Evening News
According to the duration of the arrangements, the public take the subway to the 2014
Early this morning, from Rail Transit Line 3 the subject workers, the Drum Tower Station - East entrance (Tianyi Square) station interval will be a long 25 meters wide and 22 m floor pouring is completed. Backplane pouring after this means that the full realization of a Rail Transit Line 1 "hole through" hope Chunqiao Station to Station East Ring Road South, all get through these underground stations and the interval between.
Construction of rail transit, you need to go through three landmark nodes, respectively, is the hole through the rail pass and Dentsu. The "hole through the" laying for the next step after another into the construction of mechanical and electrical installation laid the foundation.
Two years ago, the first tunnel boring machine began to promote
Rail Transit Line 1 of a project starting point for the urban area west of Gaoqiao Town, the end station for the East Ring Road South. The underground section of about 21 km long and 15 underground stations (14 underground interval between the station and the station from the Wang Chunqiao station to the East Ring Road South Station). Get through these intervals, there are two ways, one shield, the second is the open-cut. Range of 14 Drum Tower Station - East entrance (Tianyi Square) station interval is open-cut.
August 20, 2010, the first shield machine from Fuming Road Station to Century Avenue Station excavation, began the construction of rail transit shield. June 11, 2012, the West door - Gulou range the right lane tunnel through, on the 1st line of a line of shield range all through the shield construction has ended. 2-year period, a total of 11 tunnel boring machine to participate.
Open excavation of the underground range is 450 meters long, 22 meters wide, west to the rail transportation Drum Tower Station, east to Tianyi Square near Gate 1, a total of three layers: the bottom layer is the platform layer, to take the railway train; underground The second floor is the layer of station hall for ticketing and commercial development; the basement of the business district, with entrances and exits.
Shield and open-cut has gone through numerous risk
Underground shield in eastern Zhejiang First Street, Jhongshan and there are many risks.
Said Chief of Urban Rail Transit Project Construction Headquarters Agency Management Division Xu Yonggang, on the 1st line of a project through the shield in the Fenghua River and get through the first tunnel across the river, through Xiaoyong Railway Underpass railway running impact across the 11 bridge and the first demolition recovery, and protection along the Electricity, Gas and Water pipes, did not cause damage to the Drum Tower, days Ningta, Fan house and other artifacts. The accumulated experience for the future on the 2nd line of a construction.
Also encountered in the open-cut construction process, a long time troubled. 2012 Spring Festival, responsible for the range of standard III project of the Ministry of all the staff have not had one day off. The peak of construction, more than 700 people at the construction site, put off marriage.
According to reports, on the 1st line of a project in the construction of the underground segment, but also a total excavation of about 2 million cubic meters of soil. The hope Chunqiao to Century Avenue, about 10 km long road 20 meters wide, and 2 million cubic meters of soil can be covered with this road 10 meters high.
"Soil can not get out, the shield and open-cut. Basic smooth transportation in cooperation with the traffic police, urban management, environmental protection departments, earthworks, dug up the soil transported to Cixi, Zhenhai, specifically the dumping point." Xu Yonggang said.
Across the board every few hundred meters there is contact channel
Holes through rail transportation after the fact, there are two tunnels, one to back, between the two tunnels, with a lot of contact channels to communicate with each other, basically every few hundred meters there is a contact channel. Used to escape in case of the subway tunnel accident, passengers can contact channels in a timely manner fled in another tunnel.
The reporter learned that, in addition to these security measures, a Rail Transit Line 1 also used in the construction of a number of advanced technologies. Such as freezing.
Freezing method, the first application in the coal mining industry, which began two years
Used on the rail transit project. How it works similar, and refrigerators with Freon and reduce the brine temperature, cold saline through a root into the soil pipe into the soil, constantly circulating to the heat of the soil, the soil slowly cooling, and finally frozen, underground soft soil into a steel plate, hole excavation 用这招, greatly reduces the security risks of soft soil excavation.
On the 18th of this month, has begun laying
The underground segment for the year to achieve rail-pass
Laying is often followed by "hole through". A Rail Transit Line 1 on the 18th of this month to start laying.
Hope Chunqiao station is a laying of a Rail Transit Line 1. Reporter yesterday, down to the underground floor (look Chunqiao station platform layer) from the China Railway Engineering Bureau of the workers have been laid nearly 200 meters long track. These tracks the operational orbit, the next step rail car hanging down, push ahead in this job on track to achieve large-scale laying operations, "said the China Railway Engineering Bureau Ningbo track on the 1st line construction project Mr.Huang.
According to reports, a project of laying of the entire rail traffic on the 1st line, two-way full 70 kilometers (including the guides included) by the unit. China Railway Engineering Bureau 3 laying bases in a Rail Transit Line 1: Wang Chunqiao station laying the base, and laying base and cherry blossoms of the Eastern Ring Road South Station Park Station laying base.
Hope Chunqiao station laying operations is advancing from west to east, the Eastern Ring Road South Station is advancing from east to west, and Sakura Park Station is east-west advancing. Somewhat similar to the two pincer attack from the middle of flowering ".
According to reports, three bases are less than a month to complete the construction of the base. In addition to hope Chunqiao station laying base has enabled two laying base plan in July laying.
One of the tracks on the 1st line, single length of 25 meters. According to the construction of CLC, the laying of the steps are: the various parts of the tracks on the ground, assembled into a 25 m long track panel (like rafts) by lifting shipped to the operational orbit, adding a variety of damping devices into one as a whole, and then adjust the line state of the rails, steel banding after concrete placement, completion of the final fixed.
Laying, Ningbo railway applications a relatively advanced technology - sophisticated network measurement technology. "In the past, to rely on the axis to control the position and flatness, now have this precise network measurements can be controlled through the automatic guidance system to greatly improve the efficiency, but also to ensure accuracy." Mr.Huang said: "the accuracy of the improvement guarantee the improvement of driving comfort in the future there will be no more traffic ups and downs. "
According to reports, to reduce future traffic noise and to reduce traffic vibration laying the focus of the construction. In addition to the use of precision measurement, Simon exported to the Drum Tower station with the highest level of special cushioning measures to protect the environment and cultural heritage; Drum Tower Station - East entrance (Tianyi Square) station interval with higher damping measures, other sections using the medium damping measures. "The highest level of damping measures than the average damping smoother traffic, noise can reduce the more than ten decibels. Mr.Huang said.
Three bases each day to shop about 60 meters. According to this schedule, this year, the underground section of a project of the entire Ningbo rail transit line will "track laying" rail pass ".
Ningbo people to get on the subway?
The task of building rail lines this year: on the 1st line of an underground track laying and to achieve through all the underground stations, electrical and mechanical equipment installation approach, more than 12 stations began installation of electromechanical equipment, underground segment full access to the subsidiary structure construction, elevated section full construction. The first train on the 1st line of a successful downline. Underground Stations of the main structure, on the 2nd line of a comprehensive construction and meet the basic cap, a smooth transition to the Shield Zone construction, to completion of the cherry blossoms and Wangchun substation Construction Engineering, and the elevated section of full construction. Line 1 Phase II project construction.
According to the duration of the arrangements to get on the opening of the first on the 1st line a train, but also to 2014.
