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Beijing Subway Line 8 Project

Beijing Subway Line 8 Project

Tunnel length: 1.65 kilometers
Geological conditions: high water pressure, deep overburden, complex soft and hard rock formations
Shield type: mud-water shield 6.7 m
Product type: Shield tail 2200 barrels
Xiangya Road Crossing River Project, China Railway Construction 14th Bureau

Xiangya Road Crossing River Project, China Railway Construction 14th Bureau

Tunnel length: 1.425 km / 1.429 km
Geological conditions: high water pressure, deep overburden, complex soft and hard rock formations
Shield type: mud-water shield 15.01 m
Product type: Shield tail 2200 barrels
Shantou Suaiwan Tunnel, China Railway Tunnel Bureau

Shantou Suaiwan Tunnel, China Railway Tunnel Bureau

Tunnel length: 3.048 kilometers
Geological conditions: soft soil, sandy soil, granite boulders, composite strata
Shield type: mud-water shield 14.96 m
Product type: Shield tail 1500 barrels
Natural gas pipeline project, China Railway Tunnel Bureau

Natural gas pipeline project, China Railway Tunnel Bureau

Tunnel length: 10.226 kilometers in one direction
Geological conditions: mudstone, silty sandstone
Shield type: mud-water shield 7.95 m
Product type: Shield tail 2200 barrels
Shanghai Airport Contact Line, China Railway Construction/China Railway Tunnel Bureau/China Communications Tunnel/Shanghai Tunnel

Shanghai Airport Contact Line, China Railway Construction/China Railway Tunnel Bureau/China Communications Tunnel/Shanghai Tunnel

Tunnel length: 4.97 / 3.66 / 5.712 / 9.215 kilometers
Geological conditions: silty clay, fine sand, gravel
Shield type: 9m / 14.2 m
Product type: black oil/shield tail (110/1300 barrels)
Wuhan, Nanjing Highway Tunnel

Wuhan, Nanjing Highway Tunnel

Tunnel length: 3.05 km / 2.97 km
Geological conditions: hard rock, soft rock, quartz sandstone
Shield type: 16.03m / 14.93 m
Product Type: Black Oil / Shield Tail (220 / 1900 barrels)
Yichun Phosphate Mine Water Blocking Project

Yichun Phosphate Mine Water Blocking Project

Water inflow occurred at the TBM working face on March 21, 2022, with a volume of approximately 200 cubic meters/hour. Since the TBM cutter head and the tunnel face are closely connected, it is difficult to accurately determine the specific location of the water. There is no drilling operation space in front of the cutter head, so it must be retreated to a position 9 meters away from the working surface for drilling and grouting to block water. At the same time, in order to prevent the materials injected during the grouting process from influxing into the tunnel, silicate foam materials need to be injected between the TBM shield and the surrounding rock to protect the shield. A total of 1.5 tons of foam material was injected to completely protect the shield. Inject 4 tons of water blocking materials. Completely block the working surface water.
LF 401

LF 401

LF 401 is a spraying film which used for waterproofing to concrete structures. It is mainly used for spraying construction between shotcrete or cast-in-place concrete to make a "sandwich". It has good bond strength and elasticity between the two concrete. As a bonding entity, it provides excellent waterproofing properties for underground structures to prevent water ingress. LF 401 will get hardened within 4 to 6 hours (depending on environmental conditions) after spraying off, providing sufficient time for concrete lining and effectively ensuring construction progress. Similar to other shotcrete products, it can not prevent water penetration through the concrete. For such cases, it will be better to start spraying after water drainage. (Please refer to the LF 401 technical description. However, the LF 401 can be used in humid working (Non flowing water) surfaces. LF401 is also suitable for steel fiber shotcrete structures.)
LC 231

LC 231

LG 131 is a two-component solvent-free resin foam suitable for rapid filling of cavities in coal mine tunnel and rock face, water proofing and prevention of air leakage.
LC 241

LC 241

LC 241 is a two-component injection foam used for cavity filling, to isolate air and mash-gas intervention.
LG 131

LG 131

LG 131 is a solvent-free silicate modified polyurethane resin made of two-component which use for grouting and rapid treatment of fractured coal mine layer and rock fault.
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