Shanghai Metro Line 16

First Phase Project of Huai’an Modern Tram

Jiangsu Nanjing Metro Line 3

The First Phase Project of Zhuhai Modern Tram Line 1

Suzhou High Tech Zone Modern Tram Line 1

Shanghai Metro Line 8

Shanghai Metro Line 9

Shanghai Metro Line 11

First Phase of Jiangsu Nanjing Metro Line S1

Shanghai Metro Line 1

Shanghai Metro Line 7

Major Projects

Shanghai Metro Line 16

Shanghai Metro Line 16Shanghai rail transit line 16

Business Section:Rail Transport
Location:Shanghai
Project Operation Date:12, 2013
Participating Mode:Designing Contractor + Build
Project’s Breakthrough:First Single Underground Railway Tunnel with Dual Carriageway in China

The design for the station adopts the concept of “one view for one line”. We use modern building materials, technical and construction methods to build a "modern bridge” architectural image. The ancient legend "crane dances across the sand" designed for the Wild Animal Park Station highlights the special geographical and cultural characteristics of the region.

Shanghai Metro Line 16 is a regional express line, connecting Lingang and the city center. The total line is 58.8 kilometers long. We took charge of designing the entire line and part of the underground constructions. In the design of elevated section, we invented and applied the U-shaped thin-walled structure package design, construction techniques and construction technology investment decreased by about 18.5% per kilometer, compared with traditional large and small box girders. The underground section uses the single underground railway tunnel with dual carriageway in China for the first time, by presetting the wall to separate the tunnel into two semi-circular spaces. To prevent the tunnel structure from deforming, we reserved a certain gap between the top of the wall and the tunnel structure, which we called a separate structure design.

The underground section of Metro Line 16 is 10.3 kilometers long and has three underground stations. STEC constructed three intervals, two air shafts, and two stations. It is the first time a slurry shield tunneling machine of 11.58 m diameter in unstable formations was used in China. In the initial assembly of the shield machine, we use ‘frame conversion’ method to solve the problem of placing a 90-meter shield in a 49-meter-long tunnel, creating a precedent for using the large diameter slurry shield in domestic construction industry. As the key construction technology to the single underground railway tunnel with dual carriageway, the separate wall construction was attempted for the first time in China. There is no relevant construction experience to follow. We work with professional machinery manufacturers jointly developing the partition assembly robot, tunnel wall construction machines, special chassis, and other professional construction equipment. We also received national patents, and provided an example for constructing the single underground railway tunnel with dual carriageway using large-diameter shield.

Major Projects

First Phase Project of Huai’an Modern Tram

First Phase Project of Huai’an Modern TramOne phase project of Huaian modern tram

Business Section:Tram
Location:Huai’an, Jiangsu Province
Project Starting Date: 03, 2014
Participating Mode:BOT
Power Supply System:Energy Storage
Project’s Breakthrough:First Tram crossing City Center in China

The project is signed between STEC and Jiangsu Huai’an government, in the Build-Operate-Transfer mode including investment, design, construction, operation and equity transfer. The total investment of Huai’an tram project is 3.445 billion yuan and the economic indicator is 172 million yuan/km for the main line. Among which a total investment of the tram project is 3.033 billion yuan and its economic indicator is 151 million yuan/km for the main line. The “BOT + Equity Transfer” investment and financing model we use allows the local government to have more flexibility in carrying out the project and balance the budget and cost. The tram, as a ‘new industry’, is also the best alternative for Huai’an government who cannot afford the huge investment in constructing metros. The first phase of Huai’an modern tram is 20.3 kilometers long, all 23 stations are above the ground, and has 4 large underground tunnels, and a depot. Huai’an tram uses a catenary-free power supply which is also the longest catenary-free power supply tramway in China. The tram uses the super capacitor which enables the vehicle to be fully charged in only 30 seconds in the station and a long life cycle of 10 years. In braking, the vehicle’s kinetic energy can be recycled into electrical energy. Huai’an modern tram connects Qinghe District, Huai’an development zone, ecological town, Huai’an District and the city’s commercial center, business center, administrative center, and culture and tourism center, becoming the first tram crossing the city center in China. It provides a reference in tramway construction for other cities, and also motivates the national transport industry towards green and energy-saving development.

Major Projects

Jiangsu Nanjing Metro Line 3

Jiangsu Nanjing Metro Line 3 Nanjing Jiangsu Metro Line 3

Business Section:Rail Transport
Location:Nanjing, Jiangsu Province
Project Operation Date:04, 2015
Participating Mode:Managing Contractor
Project’s Breakthrough:First Single Underground Railway Tunnel with Dual Carriageway Using Large-Diameter Shield Across the Yangtze River in China

As the first national enterprise building large-scale public roads using an 11-meter shield for construction, STEC applies the large-diameter shield construction technology to rail transport, aimed to meet the clients’ need to shorten tunnel construction period and save the underground space. The tunnel, starting from East Liuzhou Rd to Shang Yuan Gate of Nanjing Metro Line 3, is 3353.94 meters long. We construct the single underground railway tunnel with dual carriageway and inner structure at the same time, with shield’s diameter reaching 11.57 meters. Because of the expansion of the shield’s diameter, the shield is able to lay two tracks at the same time. This reduces the construction costs and time significantly and saves limited urban underground space compared to traditional 6-meter-diameter shields. The metro has to go through the Yangtze River, where the geologic situation is complicated, as there are a lot of gravels, fracture zones and layers at the bottom of the river. However, due to our rich experience in previous large road tunnels, we conquered all the difficulties and successfully built a single underground railway tunnel with dual carriageway using large-diameter shield across the Yangtze River in China for the first time.

Major Projects

The First Phase Project of Zhuhai Modern Tram Line 1

The First Phase Project of Zhuhai Modern Tram Line 1The first phase project of Zhuhai modern tram line 1

Business Section:Tram
Location:Zhuhai, Guangdong Province
Project Starting Date:09, 2013
Participating Mode:Design
Power Supply System:Ground-level Power Supply
Project’s Breakthrough:First Ground-level Power Supply in China

Zhuhai Modern tram is the first tramway using ground-level power supply system in China, which has zero emission during operation. The first phase project of Zhuhai modern tram line 1, designed by STEC, stretches 8.7 kilometers. All 14 stations are above the ground, and the line has one tram base. The modern trams are 100% low-floor, with steel wheel and steel rail. The whole line uses catenary-free ground-level power supply system. STEC also adopts environmental-friendly lighting system, which gradually adjust light to become brighter when the tram reaches the station, and the lighting intensity differs on holidays and working days. In addition, in order to make full use of the tram as a major public transport, STEC offers a series of value-added services for the city. That includes 10 shuttle buses’ routes and transportation plan which can serve more than 110,000 people, as the tram network is not fully developed and there are only very limited connections with existing public transports in the first phase project of Zhuhai Modern tram line 1. The first phase of the tram involve dedicated lane rights, before the traffic flow matures and early stage transportation stabilizes, some lanes will be free, while other lanes are crowded. STEC analyzed the tram lane’s characteristics, accessible time and numbers, and then set limited conditions for cars to share the tramway. That means, trams use the first-phase tramway exclusively, but at the intersections, some of the roads are shared. On the basis of intersection traffic organizing principle, STEC offered signal control strategies and intersection signal control solutions to ensure the signal control are embedded in the design. Our study on the tram is gradually expanded to more routes and functions. We also drafted guidelines to help trams become the major transport mode in the city.

Major Projects

Suzhou High Tech Zone Modern Tram Line 1

Suzhou High Tech Zone Modern Tram Line 1Suzhou high tech Zone of modern tram line 1

Business Section:Tram
Location:Suzhou, Jiangsu Province
Project Completion Date:10, 2014
Participating Mode:Design
Power Supply System:Overhead Power Line
Project's Breakthrough:First 100% Low-Floor Tram with Steel Wheel and Steel Rail in China

Jiangsu High-Tech Zone modern tram line 1 is the first tramway in Jiangsu province, the very first 100% low-floor steel wheel and steel rail modern tramway. It is also the first tramway project to receive approval from the National Development and Reform Commission. The tram line is 25.739 km in length, and has 24 stations from Mudu at the foot of Tianping Mountain in the west to Zhongnan Street near Jinji Lake in the east. The tramline passes through 6 districts in Suzhou, with a total investment of 12.6 billion yuan. The right of way is semi-closed. Trams are 100% low-floor with steel wheel and steel rail. Overhead lines supply power to the tram. This project created a brand new situation in the development of modern trams, which also showcased STEC‘s capability as the market leader in the modern tramway industry.

Major Projects

Shanghai Metro Line 8

Shanghai Metro Line 8Shanghai Rail Transit Line 8

Business Section:Rail Transport
Location:Shanghai
Project Operation Date:12, 2007
Participating Mode:Design & Build
Project’s Breakthrough:First Double Circle Shield Tunnel in China

A more reasonable and effective arrangement of the tunnel contour and saving the underground resources are key issues for the current city rail transport construction. We constructed tunnels from Shanghai Metro Line 8’s Huangxing Park Station to Shiguang Road Station, which is 2,688 meters long. The shield started from the Huangxing green area, passing through Xiangyin Road Station and Nenjiang Road Station, and ended in Kailu Road Station. We used the double circle shield, with a diameter of 6.52 meters and a width of 11.12 meters to complete the task. Introducing this shield for the first time helped save the underground space, limit the environmental impact and reduce the construction cost.

Relying upon STEC’s outstanding R&D team, as well as manufacturing and management capabilities in shield equipment, we had a huge breakthrough on the double circle shield construction without precedence in China. We conquered major technical difficulties like double circle shield tunnel ground deformation control, tunnel axis control and tube sheet assembly, etc. and formed a relatively complete double circle shield construction technology, laying a solid foundation for the comprehensive promotion of this shield construction method.

Major Projects

Shanghai Metro Line 9

Shanghai Metro Line 9Shanghai rail transit line 9

Business Section:Rail Transport
Location:Shanghai
Project Operation Date:12, 2007
Participating Mode:Design + Build
Project’s Breakthrough:Across Metro Line 1 under Operation by using Super-Shallow Shield

As the availability of urban underground space for development becomes lesser, planning and construction of metro line is severely constrained. Construction on Shanghai Metro Line 9’s section from Xujiahui Station to Zhaojiabang Rd. Station is a case in point. The tunnel is 1,105 meters long. Due to the space limits, the super-shallow shield has to pass over the metro line 1 without affecting its operation. The depth to the top is only 4.2-5.0 meters. In order to control the risk, and minimize the environmental impact, STEC adopted two earth pressure balanced shields, with diameter of 6.34 meters, which we designed and manufactured ourselves. Our most experienced and skilled management and construction team, successfully completed the task, through precise calculation and analysis of the tunnel’s deformation characteristics and how the super-shallow shield passes over tunnels in service, without using auxiliary measures such as foundation reinforcement which may affect the nearby environment. After calculation, the maximum settlement above the Hengshan Road is only 25 millimeters, and the maximum uplift amount of Shanghai Metro Line 1 is only 2.3 millimeters, so we have controlled the tunnel axis effectively within ± 50 mm.

Relying on our more than 20 years’ experience in rail transport construction, we are able to construct tunnel projects which are extremely difficult and high risk. We are capable of helping the city achieve the “impossible” construction dream.

Major Projects

Shanghai Metro Line 11

Shanghai Metro Line 11Shanghai rail transit line 11

Business Section:Rail Transport
Location:Shanghai
Project Operation Date:12, 2009
Participating Mode:Designing Contractor + Build
Project’s Breakthrough:Crossing 23 Heritage Buildings Continuously in Short Distance

As the shields operate under the ground in the city center, it will inevitably affect the existing buildings and equipment. STEC has enormous experiences in ‘delicate operations’ in urban centers to meet the complex environment of urban rail transit rigor requirements like construction project risk, project’s quality, civilized construction and schedule control.

Tunnel of Shanghai Metro Line 11’s Xujiahui Station to Shanghai Stadium Station is located in Xuhui core business area, which is 1600 meters long in one way, passing through 23 heritage buildings like the Xuhui Middle School, and Xujiahui Catholic Church, and metro line 1 and 4 which are already in operation. Among which, five are super-grade heritage buildings, four are first-grade, four are second-grade and nine are third-grade historical buildings. The closest distance between the shield and Xujiahui Catholic Church is only 8 meters. Through a series of land subsidence control measures, we managed to keep the soil loss rate of the super-grade heritage buildings to 1.5 ‰ ~ 3 ‰, and the overall loss rate is controlled around 5 ‰ one month after the shield passing through. We make sure the safety of the building and subway deformation is also controlled. Meanwhile, thanks to good on-site management capabilities and innovative parties construction framework, we maintained a good relationship with the residents of the surrounding communities, facilities organizations, and shopping malls, alleviating any potential problems in the central business district.

Major Projects

First Phase of Jiangsu Nanjing Metro Line S1

First Phase of Jiangsu Nanjing Metro Line S1Nanjing Jiangsu Metro Line 1 project

Business Section:Rail Transport
Location:Nanjing, Jiangsu Province
Project Operation Date:07, 2014
Participating Mode:Build & Transfer
Project’s Breakthrough:China’s First GPST Tunnel

STEC invested 13.45 billion yuan in constructing the first phase of the Jiangsu Nanjing Metro Line S1 Project (The Airport Line), which was carried out in the form of total integration. The airport line links Lukou International Airport in the south and Nanjing South Railway Station, which provided the most extensive coverage with the most complete investment and financing model in China.

As the earliest company to start the construction of urban rail transit system in the industry, we have professional knowledge and rich experience in rail financing, investing, designing, planning,civil engineering, mechanical electronics, operating and maintaining. During the construction of Nanjing Airport line, our professional construction team adopted several advanced construction technologies such as GPST and URUP. Guided by principles of strict quality control and construction safety, we cooperated with the best quality suppliers like China Railway Express and Hongrun, to develop a high-quality project. Thanks to our good credit resources, we incurred less financing cost to bring in Shanghai financial institutions. In order not to monopolize the local bank resources and loan amount, we extended the project financing period to 25 years, which greatly reduced the pressure on the local government to pay the money back. This also provides our client a one-stop service with the highest quality and lowest cost rail transit system.

Major Projects

Shanghai Metro Line 1

Shanghai Metro Line 1Shanghai Rail Transit Line 1

Business Section:Rail Transport
Location:Shanghai
Project Operation Date:12, 1994
Participating Mode:Build
Project’s Breakthrough:Shanghai’s First Underground Fast Track

As the first urban rail transport construction company, STEC began the experimental project of Shanghai Metro Line 1 since 1966. In 1980, we undertook the test project of Shanghai Metro Line 1 expansion. We also completed the metro shield tunneling and tunnel lining structure selection, developed the high-precision reinforced concrete (RC) segments technology, underground diaphragm walls construction techniques, and a deep excavation technology, which were widely used in Shanghai Metro line 1 and line 2 projects later, thus reinforcing our leading position in tunnel and rail transport industries. Shanghai Metro Line 1 is a modern fast track running from north to south, across the city center. STEC constructed Line 1’s 10 stations, and 10 intervals, including Shanghai Railway Station, Caobao Rd Station, Shanghai Stadium Station, and the interval from Shanghai Stadium station to Xujiahui station, People's Square Station to Huangpi Rd Station. During the construction of Line 1, we introduced two 6.34 m diameter earth pressure balance shield manufactured by French FCB for drive-in, and also used a belt conveyor dump system for the first time.

Major Projects

 Shanghai Metro Line 7

Shanghai Metro Line 7Shanghai rail transit line 7

Business Section:Rail Transport
Location:Shanghai
Project Operation Date:12, 2009
Participating Mode:Designing Contractor & Build
Project’s Breakthrough:New Design Concept of Integrating Network, Humanity, Science, and Environmental-protection into Metro Stations

Shanghai Metro Line 7 is 34.4 kilometers long. It has 28 stations, among which we constructed 9 stations, and 8 intervals. On the basis of applying advanced technology and lessons learned in domestic and abroad in urban subway construction, combining project characteristics and difficulties, we carried out autonomous innovation in overall design, construction technology, electrical and mechanical integration, energy saving, safety and environmental protection. In terms of the overall design, we suggest integrating network, humanity, science and environmental protection into metro stations, developing several metro stations and underground space together. We independently developed the new cut-and-cover method and pneumatic caisson construction technique. The subway tunnel shield construction uses the innovative micro-disturbing tunneling technology to go through service tunnel and building structures. The development and application of more than 20 scientific and technological achievements established our leading position in the rail transport industry. We also won the second prize of 2011 National Excellent Design Award, the third prize of 2006 Shanghai Outstanding Consulting Achievement Award and 2011 Shanghai Outstanding Design Award.