A-share600528
SKAB:SEK 161.1 -1.2%

News

News

Slurry balance TBM "Mawan" crossing 1,100m under the sea

Time: 2023-06-09
Times of browsing: 3

On June 9, 2023, the super large diameter (15.53m) slurry balance TBM “Mawan” jointly developed by China Railway Engineering Equipment Group Co., Ltd. (CREG) under CRHIC and China Railway Tunnel Group broke through into the reception shaft on the Right Bore of Guangdong Shenzhen Mawan Cross-Sea Passage, marking the completion of the Right Bore of the Passage as the largest diameter undersea TBM tunnel under construction in China.


The Right Bore TBM section of Mawan Cross-Sea Passage Project is 2,063 meters long, including a sub-sea section of 1,100m, which is crucial for the entire project. “Mawan” TBM, especially designed by CREG for the project, has a diameter of 15.53m and a height of more than 5 floors, with the main component being 140m long. During the boring process of “Mawan” TBM, four major construction challenges have been solved. The first challenge is that the Mawan Cross-Sea Passage has a complex geological structural stratum, of which, 50% is uneven soft and hard rock stratum and 34.15% full-section hard rock stratum, which means a long distance of boring through high-strength rock stratum. The second challenge is the great possibility of TBM floation and deviation from the designed route due to the complex terrain in the sub-sea section, combined with the risk of severe cutter wear and the subsequent need for cutter changes, making construction more difficult. The third challenge lies in the location of the tunnel, which is at a depth of over 40m under the sea, with the maximum water pressure of 5bar and the maximum rock strength of 193MPa. The fourth challenge is that the tunnel cross-section is large and the segment outer diameter exceeds 15m, and the undersea TBM adopted, which is the largest of its kind in China, is demanding on equipment performance and construction technology.


Slurry balance TBM


Related news / 推荐新闻 More
2024 - 10 - 02
On October 1st, the highly anticipated Macao Bridge (formerly known as the Fourth Bridge Linking Macau and Taipa) inauguration ceremony was grandly held on the banks of the Haojiang River, marking the completion and operation of the fourth cross-sea bridge connecting Macau and Taipa, built with the participation of CRHIC. Macao Bridge is the first two-way eight-lane cross-sea bridge in Macau.The M...
2024 - 08 - 06
On August 5th, five “explosion-proof” earth pressure balance TBMs for export projects in Italy passed client’s acceptance and collectively rolled off the production line at the manufacturing base of China Railway Engineering Equipment Group Co., Ltd. (CREG). The machines will be shipped to Italy for the PA-CT Phase II project on Island of Sicily and the Salerno high-speed railway project, providin...
2024 - 08 - 03
From completing the first section of the main line 23 days ahead of schedule, to entering the third phase of construction 45 days in advance, the East Coast Railway Link of Malaysia, a key project under “the belt and Road Initiative” has seen continuous acceleration thanks to the application of the CCPG500A intelligent multi-scene track-laying unit “Penglai” custom-made by China Railway Science an...
About Us China Railway Hi-Tech Industry Co., Ltd. belongs to the world's 500 strong enterprises China Railway Group Limited
Contact us
Address:Building 11, Noble center, South Fourth Ring Road, Fengtai District, Beijing,China
E-mail:inter-biz@crhic.cn
Tel:010-52265888
Fax:010-52265888
Copyright © China Railway Hi-Tech Industry Corporation Limited . All Rights Reserved
犀牛云提供企业云服务