Founded in 1995, Zidong Machinery Manufacture Co., Ltd. is a professional China tunnel boring machine manufacturer and designer in researching, developing and design all kinds of machines, equipment, lathe, machining, automatic and tools. ISO9001:2000 certified, we follow strict quality management criteria to provide high quality and cost efficient products. And We have gotten CE, GS and EMC approvals. We devote to carving CAD/CAM technology and CNC numerical control technology research OEM tunnel boring machines and development. By adopting assembly technology and choosing fine materials, We have moved towards good stability and gets the position in advertisement, woodworking and metal mold industries.

Tunnel boring machines (TBM) are used to excavate tunnels with a circular cross section through a variety of geologies. They can be used to bore through hard rock or sand or almost anything in between. Tunnel diameters can range from a metre (done with micro-TBMs) to more than 14 metres. The biggest one was built for the New Elbe Tunnel in Hamburg.The partnership firm of Saturn X VOF, which specialises in design, engineering and construction underground, has been awarded the contract for the bored tunnel section of the line. Herrenknecht AG, which specialises in the design and manufacture of tunnelling machines, has been awarded the contract for drilling and lining the tunnels. Combinatie Strukton Betonbouw/Van Oord ACZ will construct the Central subway station and the connection between the Amsterdam main Central Station and the new subway station.

Strukton Betonbouw will fabricate immersed tunnel elements and place them using the immersion process. This work will be carried out on the section between the Central station and Sixhaven construction dock. Heijmans Beton-en Waterbouw will construct the starting shafts for the boring machine. Ingenieursbureau Amsterdam will be responsible for process and project management and all temporary measures during construction. Max Bogl will construct three stations: Rokin, Vijzelgracht and Ceintuurbaan, Royal Haskoning is responsible for planning and implementation and environmental monitoring. Sol Data Grontmij VOF, a specialist company in geotechnical monitoring, will monitor the construction process and warn of any changes or movement in tunnels and streets. Witteveen & Bos Consulting Engineers will be responsible for safety, risk management and the design and implementation of safety and escape systems for the metro. Benthem Crouwel is responsible for the design of Ceintuurbaan station.

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