Abstract The No.2 ventilation inclined shaft of the Daxiangling Tunnel on the Yalu Expressway, characterized by its long distance and steep gradient, required the difficult task of tunnel ventilation. Utilizing a formwork trolley with a separate central diaphragm and a traction system consisting of a two-ton slow-speed windlass and 3×4 pulley blocks, the moving and positioning process was sped up, thus guaranteeing construction speed, reducing investment and obtaining good economic returns and social benefits.
Abstract：
The No.2 ventilation inclined shaft of the Daxiangling Tunnel on the Yalu Expressway, characterized by its long distance and steep gradient, required the difficult task of tunnel ventilation. Utilizing a formwork trolley with a separate central diaphragm and a traction system consisting of a two-ton slow-speed windlass and 3×4 pulley blocks, the moving and positioning process was sped up, thus guaranteeing construction speed, reducing investment and obtaining good economic returns and social benefits.
LI Jian-Jun- Zheng-Jie
.Rapid Construction Technique of Central Diaphragm in an Inclined Shaft with a Steep Slope[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(5): 121-124
2011, Vol. 48 