The latest development of the second phase of Metro Line 13： the shield of ＂Attack No.3＂ was successfully launched.
Line 13 Phase II (North Extension)
New developments from the front ~
01
Wind well a ~ wind well b interval
Left-line shield started smoothly.
Work Area 1 of Phase II (North Extension) Project of Metro Line 13
Wind well a ~ wind well b interval
The left line "attack 3" shield started smoothly.
This is the interval between Shangwu Station and Municipal Hospital of Traditional Chinese Medicine Station.
The originating third shield machine
It marks that the project has entered a new stage of shield construction.
The successfully-launched "attack No.3" will pass through Gongming Water Supply Tunnel, E-Shi Water Supply Tunnel and Dayanshan Mountain in turn, with the total length of the left line of the interval of 1,736 meters. The main crossing strata are slightly weathered biotite granite schist, moderately weathered biotite granite schist, strongly weathered fault fractured rock, moderately weathered fault fractured rock and slightly weathered biotite granite.
Affected by bad geology, the shield construction in this section is difficult, mainly reflected in:
First, the rock hardness is high and the rock mass is complete
The basic quality grade is Grade II, the mineral composition is mainly Shi Ying, feldspar and mica, and the rock is dense and hard. Long distance hard rock excavation poses a great test for shield machine equipment.
Second, the shield machine needs to cross the fracture zone where the rock mass is broken.
Affected by the fault structure, the driving conditions are poor. There are some problems in the process of shield tunneling, such as large deformation of surrounding rock at fault zone, easy collapse of tunnel face and difficult control of tunneling direction.
Interval length
Various systems of the relevant contractors are linked and planned in advance, and the following measures are taken to ensure the smooth start of the shield:
First, carefully select shield equipment.
"attack 3" isA new EPB/TBM dual-mode shield machine based on TBMThe equipment has five key technologies to meet the needs of shield tunneling.
Second, flexibly solve the difficulties in equipment transportation.
In view of the bad transportation road conditions, the relevant contractors and road administration units negotiate and communicate, and choose hoisting equipment at night to enter the site, which will not affect daytime driving.
At the same time, the work area was planned in advance, and after detailed reconnaissance along the line, the peripheral parts were dismantled and assembled successfully by means of parts transportation, ensuring the smooth entry of shield facilities.
Third, attach great importance to the problem of security risks.
Relevant contractors have always kept the string of safety in production tight, and paid strict attention to production safety, quality control, epidemic prevention and control, flood prevention and emergency, etc., in order to reduce production risks, eliminate hidden dangers and ensure high-quality and efficient performance of the project.
Hoisting equipment
02
Line 13 Phase II (North Extension)
A connection
Nanshan, Baoan and Guangming commuter express lines
The second phase (north extension) of Line 13 starts from Shangwu Station (excluding) and ends at Gongming North Station.
The total length of the line is about 19.23 Km, set up a station 11 Block, depot one Seat. All of them are laid underground.
▲ Schematic diagram of the second phase (north extension) of Line 13 (the name of the station is subject to the actual completion)
Up to now, the second phase (north extension) project of Shenzhen Metro Line 13 has been completed. 17 All the open excavation sites have been put into construction, among which-
10A worksite completes enclosure of the enclosure structure,fiveThe main structure of each worksite is capped;
Shield well 19Number of stations, origin 16Taiji;
three A tunnel runs through a single line;
oneA subsidiary structure is enclosed.
Line 13 Phase II (North Extension) starts in series.
Guangming district science city、centre、Phoenix
When completed, it will effectively support the light.
Accelerate the construction of a world-class science city and the northern center of Shenzhen.
After being connected in series with Line 13 and the south extension of Line 13
The future will run through light、Baoan、Mt. Nan
Three administrative regions
Nanlian Hong Kong North connection Dongguan
when the time comes
It will effectively boost the integrated development of Shenzhen Special Economic Zone.
To build "Greater Bay Area on the track"
"Bay Area Interconnection" Traffic Pattern
Has important and far-reaching significance.
Source: Shenzhen Rail Office