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01.04.2021 (391 Clicks)

China’s Largest Robbins Crossover TBM launches on Intercity Railway

Machine will encounter Rivers, Weathered Ground and More in Guangzhou Bore

The largest ever Crossover (XRE) TBM in China launched in late March 2021 in Guangzhou for contractors Sichuan Jinshi Heavy Equipment Leasing Co., Ltd and CREC Bureau 2. Onsite First Time Assembly (OFTA) was utilized to build the 9.16 m (30 ft) diameter Robbins TBM, taking just five months from the start of assembly to machine launch. The hybrid machine is boring the 2.5 km (1.6 mi) long Pazhou Line Lot PZH-1 of the Pearl River Delta Intercity Railway Project, which will offer better commutes for Guangzhou residents traveling to and from University City.

The machine will encounter various ground types during its bore, from moderately to strongly weathered argillaceous shales and sandstone to mixed face conditions. Much of the rock is fractured, while the quartz content is as high as 50 percent. 'Not only are there poor ground conditions such as soft to hard uneven, fractured zones and full-face hard rock, but these sections appear to alternate frequently, which is the biggest challenge of the project. It will be a test of performance and tunneling efficiency for the machine,' said Yongsheng Qi, Project Manager for Robbins China. The tunnel is also expected to cross under rivers and other bodies of water with a cover of 20 to 31 m (65 to 100 ft). The ground strata connects to the river and is highly permeable, resulting in expected water pressures above 7 bar. The project's success lies in stabilizing the water pressure at the face while ensuring acceptable advance rates and construction safety.

The Crossover TBM features both hard rock and EPB modes and is optimized for the rapidly changing ground found on the project. An adaptable cutterhead design and two-speed gear reducers known as the Robbins Torque-Shift system enable efficient tunneling in hard, mixed, and soft ground. An adaptable screw conveyor can be mounted in the center or bottom of the mixing chamber depending on the mode. To combat high water pressures the machine is fitted with high pressure seals and can statically hold up to 30 bar. The XRE TBM began its excavation in EPB mode and will shift to hard rock mode to continue excavation after 1.5 km (0.9 mi) has been bored.

The unique project is one of several mixed ground operations using Robbins Crossover TBMs in China. Two 6.91 m (22.6 ft) diameter XRE machines are currently boring sections of the Chongqing Metro Phase 2 in ground conditions ranging from weathered mixed granite to weathered pegmatite and adamellite. The project is under the same contractors as the Pearl River Delta bore. 'At the Chongqing Metro project, we won the trust of the contractor with the performance of the Crossover machines; to date the highest monthly advance rate in Chongqing is 365 m (1,197 ft). This is one of the main reasons the contractor again selected a Robbins Crossover TBM for the Pearl River Delta project,” observed Qi.

With rates at Chongqing Metro as a precedent, the Pearl River Delta tunnel is scheduled to be completed by the end of 2021 and put into operation in 2023.

Source: Robbins

                     

01.04.2021 (605 Clicks)

Stephan von der Heyde appointed to the Management Board of Ed. Züblin AG

• New Züblin board member for Germany, Benelux and Scandinavia
• Stephan von der Heyde to succeed Ulrich Weinmann

31.03.2021 (364 Clicks)

Epiroc to acquire the Mining Electrification Solutions Provider Meglab

Epiroc, a leading productivity and sustainability partner for the mining and infrastructure industries, has agreed to acquire Meglab, a Canadian company with expertise in providing electrification infrastructure solutions to mines. The solutions support mining customers in their transition to battery-electric vehicles.

31.03.2021 (304 Clicks)

Anglo American Collaboration on Feasibility Study for South Africa’s Hydrogen Valley

Anglo American announces a collaboration agreement to complete a feasibility study to develop a “hydrogen valley” anchored in the platinum group metals-rich Bushveld geological area in South Africa. Spearheaded by South Africa’s Department of Science and Innovation (DSI), the collaboration agreement also includes energy and services company ENGIE, the South African National Development Institute (SANEDI) and clean energy solutions provider Bambili Energy (Bambili).

31.03.2021 (433 Clicks)

LKAB’s Exploration Results confirm Potential for Production of phosphorus Mineral Fertiliser and Rare Earth Elements

After having dramatically ramped up exploration activities, LKAB can now present the positive result: significant phosphorus mineral resources. “With a circular business model, we have the potential to supply European farmers with fossil-free and cadmium-free phosphorus mineral fertiliser, and the cleantech industry with rare earth elements” says Leif Boström, Senior Vice President Business Area Special Products, LKAB.

31.03.2021 (385 Clicks)

Extraordinary General Meeting of BAUER AG approves Capital Increase

The Extraordinary General Meeting of BAUER Aktiengesellschaft today voted with the required majority to approve the agenda items up for resolution, thereby supporting the proposals by the management.

30.03.2021 (702 Clicks)

Skanska promotes Joe Lindemann to Vice President of Operations in North Texas

Skanska USA has announced that Joe Lindemann, an industry veteran with 38 years of experience in commercial construction, has been promoted to vice president of operations in North Texas.

30.03.2021 (437 Clicks)

Queensland Resources Sector powers on

A quarterly report into the performance of Queensland’s resources sector due for release mid-April will show Queenslanders can continue to rely on resources to help the state recover from Covid-19.

29.03.2021 (374 Clicks)

Asite achieves BSI Kitemark for BIM Software

In a landmark achievement for the pioneering software company, the Asite CDE is one of the world’s first to achieve certification to the new BSI Kitemark for BIM software

29.03.2021 (382 Clicks)

Metso Outotec delivers Technology to Copper Electro Refinery in China

Metso Outotec has won an order from a Chinese copper producer to deliver tankhouse material handling equipment for the expansion of a copper electro refinery in China. The order value, which has been booked in Metals Q1/2021 orders received, is not disclosed.