Looking at the progress of the new line “Denchai-Chiang Rai-Chiang Khong” pops up 4 tunnels, as tall as a 20-storey building, over 27 km long.

Looking at the progress of the new line “Denchai-Chiang Rai-Chiang Khong” pops up 4 tunnels, as tall as a 20-storey building, over 27 km long.

On May 1, 2023, Mr. Pichet Kunathamrak Visit the area to follow up on the new double-track railway construction project Denchai-Chiang Rai-Chiang Khong route At Mae Ka Tunnel, Phayao Province, for Mae Ka Tunnel (Contract 2), consisting of soil and rock layers laying in the north-south direction, overlapping 2 provinces, namely Lampang and Phayao, is a single double tunnel, divided into up track and down track, length 2,700 meters (total 5,400 meters). There are two types of passages within the tunnel: 11 emergency cross passages and four equipment rooms.

by Mae Ka Tunnel It is one of four tunnels in the new double-track railway construction project. Denchai-Chiang Rai-Chiang Khong route The length of the tunnel is 2,700 meters (including both sides 5,400 meters) in the contract area 2, Ngao-Chiang Rai period. joint venture “CKST-DC2” consists of Ch. Karnchang, Sino-Thai and Buriram Panasit Co., Ltd. The Mae Ka Tunnel is constructed as a single-track double tunnel. The tunnel has a diameter of 7.4 meters and a height of 7.341 meters.

It looks like a hard clay tunnel. (Unconsolidated sediment) 85% and siltstone about 15%. New Austrain Tunneling Method (NATM) and drill and blast for hard rock were used. On the north side, Mueang District, Phayao Province, which started work in late February 2023, is currently digging a tunnel on the south side for 42 meters and the north side for 44 meters, with a drilling rate of 1 meter per day. It is expected that it will take time to dig. piercing and The total concrete pavement is about 50 months, and the southern side of Ngao District, Lampang Province, has not finished blasting the stone.

The new double-track railway project The Den Chai – Chiang Rai – Chiang Khong section has 4 tunnels which are high above ground level. Equal to a 20-storey building, with a total distance of 27.03 km in both the up and downstream tunnels, Phrae Province is in Amphoe Song, 2 tunnels.

The 1st tunnel is 1.175 km long, the 2nd tunnel is 6.240 km long, the 3rd tunnel is in Muang District, Phayao Province, 2.700 km long, and the 4th tunnel is in Doi Luang District, Chiang Rai Province, 3.400 km long. project The construction will be completed by 2028.

which will support travel and transport of goods connecting Lao PDR and the People’s Republic of China help promote travel travel and the economy of the upper northern provinces