"Tianlong Railway Chengxian No. 1 and No. 2 tunnels, through!" On August 1, the No. 1 and No. 2 tunnels of Tianlong Railway Chengxian County undertaken by Gansu Road and Bridge Tianlong Railway I. Standard 7 Branch, after 22 months of hard work by the builders, successfully completed the tunnel construction task one year ahead of schedule, laying a good foundation for the follow-up construction of the project.
↑ Tianlong Railway Chengxian No. 1 and No. 2 tunnels breakthrough site. Photo by Chen Zhengqiang
"This railway is the first railway engineering project that Gansu Road and Bridge has participated in since its establishment 70 years ago, which has achieved a leap from 0 to 1 and filled the gap in railway construction." Xu Fu, deputy project manager of Gansu Road and Bridge Tianlong Railway I. Standard 7 Branch, said.
Tianlong Railway is the first railway engineering project of Gansu Road and Bridge to participate in the construction of the project, in the face of complex and changeable construction conditions and the new challenge of railway construction technology management experience gap, the project team is not afraid of the test, not afraid of difficulties, overcoming the shallow buried section of the hole, the water-rich loose overburden out of the hole, the large deformation of water-rich soft rock, the surface settlement, mud and sand gushing, and other construction problems, and actively use the complete set of tunnel mechanization technology to achieve the goal of mechanization reduction and automatic substitution, and take the lead in introducing cantilever roadheaders in Tianlong, effectively controlling the problems of over-under-excavationto ensure the progress and quality of the project.
↑ The entrance of the No. 2 tunnel in Chengxian is progressing smoothly. Photo by Chen Zhengqiang
"In the construction, we have carefully formulated a strict special quality planning, established a perfect quality assurance system and a strict quality management system, with the concept of starting to be excellent, a success, strict implementation of the 'tooling to ensure the process, to the process to ensure the quality' requirements, and constantly innovate the construction process, continue to carry out minimally invasive micro-reform, independent research and development of lining steam health trolley, eliminate the quality of the second lining health care, have made a phased breakthrough in many aspects." He Lidong, the chief engineer of the project, said. Up to now, the project has completed 3 construction methods, carried out 2 scientific research projects, obtained 3 utility model patents, 3 software works, and 6 utility model patents, and has achieved outstanding results in scientific research and innovation.
↑ Tunnel construction workers are working on it. Photo by Chen Zhengqiang
Safety production is the top priority of project construction, and the dual prevention mechanism of safety risk classification control and hidden danger investigation and management is strictly implemented in the project promotion, and the key parts and key links of tunnel construction are focused on from the big picture, starting from the details, and focusing on the most subtle places, the most peripheral parts, and the most critical links to ensure intrinsic safety. Actively carry out fire fighting, tunnel collapse prevention, flood control and flood control, whistleblower system drills, promote training with "drills", promote energy with practice, and continuously improve the level of emergency response. At the same time, with the "four modernizations" as the starting point, many measures such as steel, semi-finished product special hooks, gantry crane safety monitoring and management system, trolley anti-collision alarm system, tunnel one-key alarm device and so on are adopted to promote the implementation of safety production standardization.
↑ A mixing station with a beautiful environment. Photo by Liu Jianjun
It is reported that the Tianlong Railway starts from Tianshui City in the north to Longnan City in the south, with a total length of 208.207 kilometers on the new main line, which is a key project determined by the national medium and long-term railway network planning and the "14th Five-Year Plan" railway development plan of Gansu Province, and is also the first railway project in Gansu Province to invest in the construction of the railway, which is of epoch-making significance to the construction of Gansu Railway. Gansu Road and Bridge Tianlong Railway I. Standard Seven Division undertakes the construction of Tianlong Railway mileage of 6.002Km, mainly including "two bridges, two tunnels, three roads and one station", the smooth breakthrough of the No. 1 and No. 2 tunnels in Chengxian County, in order to achieve the early completion and opening of the whole line has taken a new step.