As the first tram in Zhejiang Province, the Jiaxing Tram Project is one of the "one hundred key projects in one hundred years" and one of the ten landmark projects of Jiaxing City. It is also a major transportation facility project for Jiaxing to implement the national strategy of Yangtze River Delta integration and construct a central hub city in the core area of the Yangtze River Delta.
The Phase I project passes through 49 intersections along the way, including 27 signalized intersections and 22 non-signalized intersections. The average interval between intersections along the route is relatively close, basically 318 m to be specific. Phase I passes through 16 large and small bridges and under nearly 1 km of railways, and sees complex construction environment. The large engineering volume involves many different professional contents, such as sub-grade, bridge, track, road, drainage, greening, underground structure, housing construction, power supply, communication, operation and dispatching, geomantic electricity and escalator, intelligent building, intelligent transportation, ticket sales system, process equipment, etc.
It only took 370 days for STEC to open the first section of Jiaxing Tram. This speed has broken the conventional domestic tram construction schedule, and set a new benchmark for similar tram construction projects.

Project introduction: Qinwang Tunnel is the first shield tunnel for both highway and railway purposes in Zhejiang Province. The tunnel section, with a total length of 2,868 m, crosses the Fuchun River and connects the Qinwang Square, the "City Eye" of Qinwang, and the Zhongsha district. It works as a crucial infrastructure that improves the cross-rive traffic system in Fuyang. The shield section of left line contracted by STEC is as long as 1,254 m. The outer diameter of tunnel segment is as long as 15.2 m and the inner diameter is 13.9 m. simultaneously, STEC also constructs the underground complex of Qinwang Square, the Qinwang Square Station of rail transit and the relevant ancillary works. The project, upon its completion, will open up the North-South traffic artery of Fuchun Bay in Fuyang, Hangzhou, connect the golden axis of Fuyang rail transit, and thus accelerate the high-quality development in urban integration.

This project works as a supporting equipment of the supporting facilities for hydrogen supply and storage for pilot production line with an annual capacity of 1,000 sets of fuel cell bipolar plates and cell stacks of Ningbo Lvdong Fuel Cell Co., Ltd. under SPIC. The project comprises new supporting facilities for hydrogen supply and storage that provides 35-MPa high-pressure hydrogen refueling service. Its daily hydrogen refueling capacity is 500 kg and can meet the refueling demands of 20 buses with hydrogen fuel cells. The project is located at the SPIC Hydrogen Energy Industry Project Base in Cidong Binhai Economic Development Zone, Longshan Town, Cixi City. The station adopts a non-fixed cylinder pack assembly and the dual external transmission scheme of direct pipeline supply and vehicle refueling. It has the advantages of less land, low construction costs, good security, small staffing and low operation costs. The fuel cell pilot production line project serves as not only a key initiative for SPIC to respond to the national hydrogen energy strategy and to open up the hydrogen energy industry chain, but also the concrete embodiment of the "three innovations" and “industrialization, marketization and scale expansion” of the hydrogen energy strategy implemented by STEC Shanghai Energy Construction Group Co., Ltd.

The PPP project for integrated traffic hub of Wenling Station is located at the Railway New District of Wenling City, Zhejiang Province, with a total construction area of 108,800 m2. The project mainly includes four sub-projects: The east square hub, the supporting housing for rail transit, the bus transfer center and the parking building.
Facing the challenges like the wide work plane, the large volume of steel structure and the great number of buildings / structures, STEC made early plans and careful preparation. It escorted the construction of steel structure through early survey, GPS positioning, BIM simulation, advance deepening and refining of steel structure process. During the construction of deep foundation pit, STEC actively dealt with complex geological conditions, difficult support, super typhoon and other adverse factors. Thus, it ensured that the land subsidence, the maximum settlement of ramp pier and station pier column were in their controllable ranges, and guaranteed the safe operation of railway. STEC has made joint and practical efforts to construct a new traffic pattern and secured the largest and most beautiful city entrance for Wenling.

Section II (Shaodu Road - Guangyuan Avenue section) of Yunfei Road Phase II (Shaodu Road - Middle Hongtang Road) project covers a total length of 1670.56 m. The main construction comprises road engineering, operation maintenance engineering, drainage engineering, bridge engineering, etc. The section II of civil engineering construction of Yaojiang New Area Utility Tunnel Phase I (Yunfei Road) is a trunk-type comprehensive utility tunnel established under the sidewalk, the non-motor lane and the separation belt (biological retention zone) on the north side of Yunfei Road.
This project belongs to the joint construction of road and utility tunnel, which has the following difficulties. First, the excavation depth of utility tunnel foundation pit should be 5 to 10 m; the tunnel crosses 3 rivers in total so the foundation pit must be excavated with safety. Second, the waterproof grade for tunnel in this project is grade two so the main body of the project has a high waterproof requirement.
After completion, the project will drive the development in Yaojiang New Area and promote the new urbanization and the modernized urban construction in Yaojiang New Area. It will improve the comprehensive carrying capacity of urban infrastructure and facilitate the comprehensive utilization of underground space resources.

The PPP project of connection line between Hangzhou-Jinhua-Quzhou Expressway to Hangzhou-Shaoxing-Taizhou Expressway is jointly undertaken by Zhejiang Communications Investment Co., Ltd., Zhejiang Communications Engineering Co., Ltd., STEC Shanghai Infrastructure Co., LTD., and Shanghai Road and Bridge Co., Ltd. The project starts from the north side of Zhangjiafan Hub of Hangzhou-Jinhua-Quzhou Expressway and ends at Fuquan Hub of Hangzhou-Shaoxing-Taizhou Expressway. The route is as long as 22.028 km. The main construction tasks involve subgrade, bridge, culvert, tunnel, pavement, traffic safety, afforestation, etc.
The connection line of Hangzhou-Jinhua-Quzhou Expressway forms an important part of expressway network in Zhejiang Province. It is not only the main fast channel connecting Hangzhou and Shaoxing but also a key channel for Shaoxing City to integrate into Hangzhou metropolitan area and to realize the integration of three districts. Simultaneously, it is also an important link of the outer ring expressway of Keqiao District, Shaoxing City.
STEC scientifically plans and carefully organizes the construction, solves the construction and technology difficulties, addresses the bad geological section, and then get through the construction bottleneck. Based on good construction organization, STEC reasonably allocates resources and keeps balance in construction. It takes environmental protection seriously, carries out green, environmental and high standard construction, and penetrates through forest land, reservoirs and streams. STEC is committed to construct a “safe, ecological and environmentally friendly” highways and contributes to the integrated and high-quality development in the Yangtze River Delta.

It is an intelligent operation and maintenance management platform for transportation network infrastructure for transportation supervision, operation and maintenance departments. It mainly serves the construction, operation and management of "six horizontal and eight vertical" expressway network in Shaoxing, providing facilities and equipment asset management, maintenance and repair business management, maintenance decision management, and development and maintenance of operation and maintenance APP by a series of intelligent infrastructure operation and maintenance integrated service solutions such as compilation of digital operation and maintenance guidelines, deployment of intelligent operation management platform, and intelligent analysis of operation and maintenance big data. The platform has standardized and normalized the operation and maintenance of infrastructure, continuously precipitated effective data from unified standard data and extracted reproducible and generalizable data models. It has effectively assisted operation and maintenance personnel in special research and analysis, realized data-assisted decision-making based on facility safety and operation and maintenance safety supervision by connecting 440 Internet of Things sensors, and improved the emergency command ability and road management efficiency.

It is the first component-level water facility and equipment management platform based on BIM+GIS technology, which mainly includes functional modules such as monitoring network, pipeline operation and maintenance, data analysis, hydraulic model, daily dispatching, BIM+GIS, water balance, facility and equipment management and emergency command. It can effectively identify and predict the bottleneck of urban drainage system and its possible problems and risks, and provide professional analysis and management of water pipelines, water quality, leakage, etc. Almighty hard core of refined management: The digital city twin base formed by BIM is adopted to form a visual and component-level digital asset operation and management mechanism, which provides a digital and information foundation for the integration of planning, construction and management in the field of sewage engineering in Jiaxing. Combination of virtual and real daily maintenance: Based on MR mixed reality management platform, inspection personnel can inspect through mobile terminal inspection APP, realizing the combination of "virtuality" and "reality" between BIM model of underground pipelines and inspection and maintenance site.

Wenyi Road Tunnel is located in Xihu District of Hangzhou City. It starts from North Baochu Road in the east and end at Zijingang Road in the west. The Tunnel forms a part of Desheng Expressway in the “four-longitudinal and five-horizontal” urban expressway network planned and designed by Hangzhou Municipal Government. In the initial planning and construction of Hangzhou Wenyi Road Tunnel, STEC Urban Operation took Wenyi Road Tunnel as the pilot application project, participated in consultation, and took into account the operation and maintenance demands upon its completion in advance. It cooperated with Zhejiang Province to construct the first domestic tunnel in full-life-cycle operation and maintenance mode. Guided by the concept of full-life-cycle operation management, STEC Urban Operation has developed a full-life-cycle tunnel management platform with data traceability throughout the process of design, construction, operation and maintenance. It established a real-time operation and maintenance evaluation system, thus striving to realize the “incomplete road closure during overhaul”. The research achievement on the full-life-cycle operation and maintenance project of Wenyi Road Tunnel have been highly praised by industrial experts and fully approved by Hangzhou Municipal Government. The relevant operation standards have been incorporated into the local standard of the Technical Code for Urban Tunnel Maintenance in Zhejiang Province.

STEC Urban Operation is operating, managing and maintaining about 148 km of highway, 3.86 km2 of highway greening, water sprinkling and cleaning in Jiashan. From 2021 to 2024, the integrated digital highway operation and maintenance project of Jiashan County will realize the fully integrated digital operation and management from facility assets, operation status and operation process to assessment through the comprehensive management by central platform + digital operation + resource coordination. The project will achieve the main purpose of “one screen for facilities, one network for operation and management, and dynamic risk prevention”. Through this project, the company will implement the full-life-cycle management over transportation facilities and create a national demonstration of digital transportation.
STEC Urban Operation is making innovations in the maintenance and management mode and deepening the reform in highway maintenance system, so as to comprehensively facilitate the high-quality development in highway and transportation management. The company is sparing no effort to underpin the digitized foundation for comprehensive management and maintenance of rural highway facilities, actively create a typical scenario for information-based operation, maintenance and management businesses, and improve the efficiency and level of intelligent rural highway services. It is taking a lead in the transformation of rural infrastructure services to high-quality development with digital empowerment, and providing quality and efficient services for the development in agricultural transportation.

The latest 11.83m*7.27m rectangular shield machine developed by STEC was adopted on the first phase of Ningbo Metro Line 3, which has the largest cross section in the field at home and abroad. This kind of rectangular shield machine pioneered the integrated bidding mode of “scientific research-design-construction”. Relying on rich experience in designing and constructing shield machines, STEC’s scientific research team succeeded in developing the “Yangming” shield machine, which was named after the master of mind study——Wang Yangming. We have also formed a close and efficient cooperative relationship with Ningbo Rail Transport Group by carrying out the project.

During the development of the rectangular shield machine, STEC adopted several innovative technologies. One is modular lay-out technology including two X-shape-interested circular cutters with multiaxial eccentric cutter system, perfectly solving the previous dead zone problem of rectangular shield machine excavating sections, and also has obvious advantages in economy and safety. This is suitable for cutting various unconventional cross sections. The second one is a control method and an algorithm to avoid the interference of two X-shape-interested circular cutters when revolving, ensuring the safety of the two cutters in operation. That’s because the partial overlapping of two X-crossing cutters’ swivel trajectory on the working surface causes interference of the two cutters thereby losing control and causing damage. The third one is multi-DOF tunnel plate assembling technology with column building functionality, implementing optimized path planning and high precision, collision-free tracking with compound motion technology, breeding a new solution for automatic tunnel place delivery processing. The fourth one is adopting the automatic articulated technology of heavy quasi-rectangular shield machine shape curve, which can make a R300m turn. There is no corresponding case in the rectangular shield machine field at home and abroad.

Qianjiang Channel is constructed by STEC through BOT investment with 3.884 billion yuan. It is China's first large diameter shield tunnel project, integrating "investment, construction, operation and maintenance”.

In terms of investment and financing, STEC determined the financial services program and partners through bank bidding for the first time. By cooperating with the Bank of China, China Merchants Bank and Shanghai Pudong Development Bank, STEC raised comprehensive credit of 25.4 billion yuan in total, effectively reducing the overall cost of financing, distributing the pressure of funds from tight monetary policy to different banks. We avoided capital risk and ensured the capital is secured.

In terms of the construction, we successfully pushed 15.43 meters’ diameter large shield machine crossing the embankment foundation of the Ming Dynasty Qianjiang Levee for 4 times, overcoming the world-class difficulty to build express way tunnel in the special hydrological conditions of Qiantang River. In addition, Qianjiang Channel is the first batch of model construction project subsidized by the national budget from the central government which funds semiconductor lighting products application. The whole tunnel was equipped with LED light source illumination. It can save 2.47 million kwh each year compared to ordinary fluorescent lamp system. After the opening of the tunnel, STEC, as its operation and maintenance agent has formulated safety regulations, management system, and operation manual for the tunnel, thereby establishing a management system fitting for local project operation.