KALIWA TUNNEL PROJECT – PHILIPPINES

Kaliwa Tunnel project is located on the Kaliwa River on Luzon Island in the eastern Philippines. Kaliwa diversion tunnel has a total length of 21.495km and a longitudinal slope of 0.1682%. TBM tunnel produced by CRCC is used in the tunnel boring and lined with segments. TBM tunnel is excavated from the exit to the entrance. inner diameter is 4.0m after the lining of the segments, TBM tunnel boring began in February 2023.

SINGAPORE T-217 SUBWAY PROJECT

The Singapore subway Thomson Line T217 project encompasses a station and two tunnels, each measuring 754 meters in length, with a minimum turning radius of 400 meters. The tunnel has a diameter of 6.6 meters, while the borehole diameter is 5.8 meters, and the segment thickness measures 27.5 cm. A Tunnel Boring Machine (TBM) manufactured by Herrenknecht in Germany was employed for tunneling operations. Initially, the starting shaft was positioned vertically before transitioning to horizontal alignment. Construction officially commenced on June 6, 2014, with TBM tunneling beginning on June 8, 2016; the entire project was completed within a span of 209 days. Throughout construction, the tunnel traversed sensitive locations including the Australian Embassy, Singapore's Ministry of Foreign Affairs, the Chinese Embassy, as well as private residences belonging to both Singapore’s Prime Minister and senior officials—rendering the construction environment highly complex. The civil works for the tunnel were completed by May 30, 2018; those for the station were finalized by July 30, 2018; and contract handover occurred on December 30, 2020.

CCS TBM TUNNEL PROJECT

CCS hydro power project is located in the provinces of Napo and Sucumbios in Ecuador. Tunnel project is located downstream from the confluence of the Quijos and Salado rivers. The installed capacity of the plant is 1,500 megawatts. Power station project consists of the first water intake project, tunnel project, the regulation reservoir project and the underground powerhouse project. As an EPC general contract project, the total length of diversion tunnel is 24.83km. Two German Herrenknecht TBMS are used for tunnel construction. The diameter of the TBM cutter: 9.11 meters, the form of left and right ring 6+1 is used for the segment lining, the thickness is 0.3 meters, and the inner diameter of the lining is 8.2 meters.

TBM in the whole excavation construction, created a single month of the excavation record of 1000.8 meters, similar hole diameter TBM excavation third in the world, and obtained the Herrenknecht certification. TBM officially began tunneling on October 18, 2012, and the TBM tunnel was successfully completed on February 4, 2015. The project was officially put into operation on November 18, 2016.

CEFALÙ SUBWAY PROJECT - ITALY

Cefalù, March 3, 2022 – at the Toto construction site in Ogliastrillo, work began on the excavation of the Cefalù Tunnel, the longest of the three tunnels for doubling the Cefalù/Ogliastrillo – Castelbuono railway on the Palermo – Messina line. The project has a total length of 12.3 km, the new double-subway line, almost entirely underground, runs completely by-passing the old railway line; the project, contracted by Rete Ferroviaria Italiana (RFI) to Toto Costruzioni Generali,   “Margherita” Tunnel Boring Machine (TBM), which will excavate and line over 13 km of the two parallel tubes of the Cefalù Tunnel, was put into operation. With a length of 140 metres, a weight of 1650 tonnes and a total power of 5.6 MW, the TBM is equipped with a 10-metre-diameter rotating head with more than 60 steel excavation tools, with which it is able to break up rock. Excavation of the Cefalù Tunnel begins in the direction of Messina. Highly specialised staff of around 100 will work on the excavation, mostly on board the machine, in three shifts over 24 hours, 7 days a week. Others will be engaged in subsidiary activities, for a total of more than 350 workers employed on the site. With these numbers, an average daily advance of 16 metres is estimated, with peaks of more than 20 metres of tunnel excavated and lined. At this rate, work on the tunnel is expected to be completed by November 2024.

To cope with the complex geology of the Madonie terrain, the TBM has been designed with a double mode, being able to operate both in “open” mode on rocky fronts and in EPB (Earth Pressure Balance) mode to consolidate the excavation face in more yielding terrain. In addition to cutting construction times, mechanized excavation has the advantage of drastically reducing risks for the workers inside the machine, who always operate in a protected environment, either by the shield of the TBM or by the lining already in place.

Introduction of TBM tunnel project of Tibet Paimo

Doxiongla Tunnel is a tunnel through Doxiongla Mountain on the Paimo Rural Road. The total length of TBM construction section of Doxiongla tunnel is 4784 meters. The entrance elevation is 3547m and the exit elevation is 3566m. Doxiongla Pass is located in the northern part of the main ridge of the Himalayas about 4200 meters elevation, Doxiongla mountain snow does not melt all year round. This project uses the TBM produced by Herrenknecht in Germany for tunnel construction and segment lining, TBM cutter diameter: 9.13 meters, segment lining inner diameter: 8 meters, TBM began tunneling on May 2, 2016; On December 25, 2017, the Doxiongla Tunnel was successfully completed.

Introduction of Shouyang Wind power project

Shouyang Wind Power Project is located in Shanxi Province, with a total installed capacity of 48MW, including 24 fans, a single fan power of 2MW, a fan height of 90m, a 35KV transmission line of 38KM, and a 220KV booster station.