A world hub, tides rising in the East,

Recently, the highly anticipated in China

at the construction site of the Shanghai East Station comprehensive transportation hub project,

7 DMP method mixing pile rigs assembled in force for the first time,

heads held high, a scene of bustling activity,

accompanied by the rhythmic beats emanating from the machines,

lifting, sinking, drilling, mixing,

laying a solid foundation for the *** transportation hub.

The Oriental Hub Shanghai East Station is a large comprehensive transportation hub built around the Shanghai East Railway Station, integrating aviation, national railway, regional railway, urban rail transit and other transportation functions as well as station-city development, with a total investment of 150 billion yuan; it is a *** transportation hub connecting the Yangtze River Delta with the world. Once completed, Shanghai East Station will become Shanghai's second-largest railway passenger station after Shanghai Hongqiao Station. It is a major project advancing the construction of the Shanghai Pilot Free Trade Zone Lin-gang Special Area and is of great significance to Shanghai's accelerated effort to build itself into a socialist modern international metropolis with global influence.

▲Overview plan of Shanghai East Station

▲Rendering of Shanghai East Station upon completion

The underground civil engineering project of the station yard area of the Oriental Hub Shanghai East Station is located in Zhuqiao Town, Pudong New Area. The total construction area of this part of the project is approximately 374,600 square meters. The main construction content includes the foundation pit, foundation and main structure of the underground main structure works (including electromechanical embedded works, among which: the air-rail intermodal module, the underground portion of the city atrium and corridors, the underground parking lot and equipment rooms, the underpass municipal roads (Zhandong Road, the reserved MRT project including a 673-meter double-track shield tunnel), reserved works for future lines, and reserved works for air-rail logistics.

▲Construction site of the underground civil engineering works in the station yard area of the Oriental Hub Shanghai East Station

The DMP method mixing piles in this project are mainly used for trench wall reinforcement of diaphragm walls, passive zone reinforcement and slope reinforcement in the station yard area, at the junction between the station yard area and the station-front passage, and in the Hedong area. The project adopts the "socketed single-hole method" for construction. The total volume of mixing piles required on site is about 370,000 cubic meters, with a pile diameter of 850 mm and a depth of 16–25 m. Among them, the water-stop curtain in the station yard area totals 499 panels, the height-difference reinforcement totals 60 panels, the trench wall reinforcement totals 72 panels, and the in-pit reinforcement totals 12,654 panels; the trench wall reinforcement at the junction between the station yard area and the station-front passage totals 565 panels; and in the Hedong area, the DMP method mixing pile trench wall reinforcement totals 224 panels and the in-pit reinforcement totals 484 panels.

▲Construction site of DMP method mixing pile rigs

▲Schematic diagram of DMP method mixing pile distribution (parts marked in red)

▲Engineering geological profile

▲Construction technical parameter table

Given the tight schedule and heavy construction tasks of this project, 7 DMP method mixing pile rigs were assembled for coordinated construction on site. They cooperate safely and efficiently, with low failure rates, stable and precise performance, and rapid adaptation to the construction environment. Each rig completes 10–12 panels of piles in 12 hours; their excellent construction performance and robust product performance effectively guarantee the project's construction efficiency.

▲Construction site of DMP method mixing pile rigs

This project site uses a relatively large number of DMP method mixing pile rigs. Judging from the on-site construction results, they feature excellent intelligent digital construction technology, cause little disturbance to the surrounding environment, and produce high pile quality, perfectly meeting construction needs. We trust Shanggong's product quality and feel confident when using them," said the on-site construction manager.
The superiority of the DMP method mixing pile has been further verified and recognized in this Oriental Hub "super project," which will help promote and apply it in more infrastructure construction projects in China in the future. In this "super project," DMP method mixing pile rigs have once again won high praise from users by virtue of their robust product strength, solid quality and market reputation.

▲Construction site of DMP method mixing pile rigs

The DMP method mixing pile rig developed jointly by Shanggong Machinery with Shanghai Yuanfeng and Tongji University adopts a digital construction control system and controls the rotation of the mixing blades, while four drill pipes simultaneously inject slurry and gas to achieve automated pile formation. Through automatic control of in-ground pressure and the pressure-relief channels formed on the outer side when the special-shaped drill pipe rotates, the rig achieves micro-disturbance construction, solving problems in traditional mixing pile construction such as uneven pile body strength, low informatization level, difficult control of construction quality, large amounts of displaced soil, significant construction disturbance and low pile formation efficiency.       

The DMP method mixing pile rig adopts an intelligent digital construction control system, making the construction process quality controllable and greatly improving construction convenience. The digital construction control system collects and displays parameters including grouting pressure, slurry flow rate, air injection pressure, in-ground pressure, pile formation depth, pile formation speed and pile verticality; it can generate construction records containing parameters such as pile length, construction time, in-ground pressure, cement consumption and pile verticality; and it can upload construction parameters to the central control center to achieve real-time monitoring of the construction process.

▲Display interface of the DMP method mixing pile digital construction management system

Shanggong Machinery is committed to the development and construction of underground space and research on related construction technologies, dedicated to providing customers with overall underground foundation solutions and supporting national urban infrastructure construction. It has always adhered to the philosophy of "professional service, creating value" and has always insisted on growing together with customers. Shanggong Machinery will, as always, leverage its deep accumulation in the field of piling machinery to fully meet customers' construction needs, provide professional services and create value for customers.