Fast and Safe through Wuxi
May 13, 2013
Tunneling and gallery techniques » Jacking by machine » Tunnel boring machine
Eight tunnel boring machines from Herrenknecht excavated almost 16 kilometers of tunnel in only 20 months, crossing beneath the emerging metropolis of Wuxi. The machines mastered challenging tunnelling stretches with small overburdens. The last breakthrough, for the time being, was celebrated on March 3, 2013. The first two metro lines in the 3000 year old town on Taihu Lake near Shanghai are expected to start operation in 2014. A total of 5 metro lines are planned.
A total of 8 Earth Pressure Balance Shields (Ø 6,370 – 6,390mm) from Herrenknecht have tunnelled through the underground since July 2011 to construct the first two metro lines in the 4-million strong metropolis of Wuxi in the east of China. For the construction of Wuxi's first two metro lines, they excavated a total of almost 16 kilometers.
On March 3, they completed their mission with the final breakthrough of the S-730 tunnel boring machine. With top performances of more than 33 meters a day and 164 meters a week, the TBM made its way through the ground excavating a diameter of 6.39 meters. Thus, 2,508 meters of tunnel for metro line 2 were built in only 10 months.
Before that the machines also mastered challenging tasks when constructing the metro tunnels for line 1. The S-663, a compact Earth Pressure Balance Shield with a diameter of 6.37 meters, drove only a few meters beneath residential and commercial buildings. On December 7, 2012, the machine achieved final breakthrough. Right at the start of tunnelling, on May 24, only 7 meters of soil were above the machine, and the distance to the foundation pillars of the building above were only 3.7 meters. Therefore, the ground, consisting of strongly aquiferous clay, was treated with a special frost procedure. Following a smooth start, the machine quickly crossed beneath the building.
Wuxi with its more than four million inhabitants, situated in the east of China near Shanghai, is investing a great deal in the construction and extension of efficient public transport systems. At least 5 metro lines are to cross the city in future. The two metro lines 1 and 2 with a total length of 58.5 kilometers are expected to start operation by the end of 2014. Line 1 will cross the city from north to south, and line 2 from east to west. Herrenknecht received orders for 5 EPB Shields for the construction of line 1, and orders for 3 machines were placed for the construction of line 2. The machines were assembled by the local branch Herrenknecht (Wuxi) Tunnelling Equipment Co., Ltd.
China's economic growth and the increasing urbanization have led to a high demand for efficient underground traffic and supply infrastructures. Chinese tunnel engineers have completed a total of 400 kilometers of metro tunnels safely and quickly using Herrenknecht technology since the first project in Beijing in 2000. Around 100 further kilometers are currently under construction.
Wuxi Metro Line 1 and Line 2 | |||
Machine data | Project data | ||
Machine type: | 8 x EPB Shields | Tunnel length, total: | 15.66km |
Diameter: | 6,370 – 6,390mm | Geology: | Wuxi Clay |
Installed power: | 600 – 675kW | ||
Client: Wuxi Metro Group Co., Ltd | |||
Customers: Shanghai Mechanized Construction Co. Ltd.; Shanghai Baoye Construction; China Railway 14th Bureau Group Co. Ltd.; China Railway 19th Bureau Group Co. Ltd.; China Railway 1st Group Co. Ltd. (CREC); Wuxi HongYuan Construction Group Co. Ltd., China Railway Tunnel Group 3 Bureau |
More News and Articles
Apr 24, 2024
News
Sustainable drainage solutions: German Start-up transforms urban water management.
Germany boasts a well-established infrastructure for managing rainwater and wastewater, yet many developing countries lack such systems. Addressing this gap, …
Apr 22, 2024
News
HDD tooling that gets the job done
Horizontal directional drilling is a dynamic process that constantly changes and adapts to suit a range of applications across utilities and infrastructure. Operators looking to get the most from their equipment …
Apr 19, 2024
News
WATCH: Overnight with SAERTEX-LINER H20 in São Paulo
Available through Pipe Core, high-quality liner SAERTEX-LINER H20 performed under pressure in São Paulo, Brazil.
Maintaining aging potable water pipe infrastructure is a constant challenge …
Apr 17, 2024
News
Immersive media provides wastewater experience in Denmark
An immersive media experience (IMX) may not be what most people want when they think about industrial wastewater, but that is exactly what visitors can expect when they visit a new installation …
Apr 15, 2024
News
Spotlight on gender diversity at Pipe Core
Since founding in 2008, Pipe Core’s team has grown across all areas of the business and is now in a position where there are more females than males across the organisation. Research published in Harvard …
Apr 12, 2024
News
New Wave of Startups Scale Innovation to Solve Global Water Challenges
Innovators from Around the World Join Xylem’s 2024 Accelerator Program to Deploy Breakthrough Innovations for Utilities and Industrial Users of Water
A new group of startups …
Apr 08, 2024
News
Integrated sustainable electricity and clean drinking water systems
Altitude Water and New Use Energy Solutions have partnered to create integrated, mobile solar-plus-water generation systems that produce sustainable electricity and clean drinking …
Apr 05, 2024
News
How to Evaluate Hydraulic Fracture Risk in HDD Design
The design of horizontal directional drill (HDD) installations often requires an evaluation of the potential for hydraulic fracture of the soil layers through which an HDD passes. Evaluating …
Apr 02, 2024
News
Historic Project Linking Rome and Vatican City Uses Advanced Technology and Local Knowledge to Keep Water Flowing
Relocation of Major Sewer Infrastructure Enables Construction of Pedestrian Link for 35 Million Visitors to the 2025 Jubilee
Water …
Mar 27, 2024
News
USU Study Looks at Water Main Break Rates in the U.S. and Canada
Report Highlights Correlation Between Material and Diameter
Utah State University (USU) has published new research on water main breaks in the United States and Canada, examining …
Mar 26, 2024
News
Update BE-21: New Material in Course and Modules on Trenchless Pipe Installation
Online training on the topic of pipeline installation in civil engineering: Trenchless technology for underground drainage construction can be a resource-efficient, …
Mar 25, 2024
Article
Bacteria as a new weapon in wastewater treatment
In early November, San Diego based startup Aquacycl officially opened its first European office and test center at the Water Campus in Leeuwarden. The Netherlands Foreign Investment Agency (NFIA) …
Contact
Herrenknecht AG
Achim Kühn
Schlehenweg 2
77963 Schwanau
Germany
Phone:
+49 (0) 7824 / 302-5400
Fax:
+49 (0) 7824 / 302-4730