The railway construction heavy TBM help Jilin "loose lead into the long completion
The space available resources on land are gradually stretched in the accumulation of development, so people begin to think about the development of underground and the space under which each available resource can be effectively utilized.
In January 10th, the diversion "loose lead into the long run through the first section of diversion tunnel project is the largest scale in Jilin Province, it is used in the railway construction heavy relying on the national" 863 Plan "developed by China's first hard rock tunnel boring machine (TBM), driving up to 1209.8 meters, refresh the domestic driving record.
Jilin most
The loose water supply project in the central city of Jilin province is a large water transfer project from the Fengman reservoir area of Songhua River to the central part of Jilin province. It is the largest water transfer project, the longest water transmission line and the widest water receiving area in the history of Jilin.
Jilin song No. second is located in Jilin city of Fengman reservoir to wind river bank, the main rock tuff and granite granite, which accounted for more than 50%, the granite rock compressive strength generally above 200 kn, the rock is very unstable, the difficulty in supporting high, supporting a large amount of work.
The railway construction heavy TBM help Jilin "loose lead into the long completion
A total of 634.96 kilometers of water conveyance line, the first section of 21.22 km diversion tunnel by hard rock tunnel boring machine (TBM) construction, safety through the special geological and rock band, and created 6865m tunneling successfully, the average monthly TBM footage of 756.3 meters, the maximum daily footage of 86.5 meters, a new record in the domestic TBM construction in 5 and June for 920 meters above the footage, creating the most similar tunnel construction. Due to technical support and smooth construction, the task is completed 110 days ahead of schedule.
Suit one's measures to local conditions
According to the geological characteristics of the railway construction heavy TBM R & D team after careful research, combined with the test of engineering geological conditions to carry out the key technology research and technology research, breakthrough technology, high power, variable load, high accuracy electro-hydraulic control system design and integration technology, the key components of state monitoring and fault diagnosis technology and vibration analysis and vibration damping technology the core technology of large diameter TBM coordinate system.
The railway construction heavy TBM help Jilin "loose lead into the long completion
In the central city of Jilin Songhua River water supply project general trunk tunnel "long distance, large buried depth, high stress, high pressure, high temperature and large water, easy to rock burst and other geological characteristics and technical difficulties, make pertinence and adaptability of large diameter TBM, the tunnel project transformation of high strength high risk, high pollution has become the green construction mode is relatively safe, efficient, fast, high quality, meet the tunnel construction safety, environmental protection, high efficiency, high degree of integration requirements, create the conditions for the modernization of Jilin water tunnel construction.
The railway construction heavy TBM help Jilin "loose lead into the long completion
It is reported that this hard rock boring machine TBM Jilin through drinking water engineering excavation diameter 7.93m, length 205m, weight 1500t, installed power of more than 5000kW, in the tunnel excavation, supporting, mucking, ventilation, drainage and other functions in one, can be a safe and effective completion of the tunnel construction, included in the national "12th Five-Year" the National 863 plan and 973 research plan.
"Since 12th Five-Year," China's railway transportation, highway transportation, water conservancy and hydropower, city rail transportation, mine construction, large-scale gas transmission, water diversion project and other infrastructure construction has been in full swing, large diameter, large buried depth, long distance tunnel engineering more and more construction using TBM of TBM in the world the huge market demand. Loose lead into safety through the first section of the long project, not only laid the foundation for the central city of Jilin province Songhua River water supply project completed on schedule through the water, but also provides scientific data and valuable experience for the development of major equipment technology in China, marking China's modern tunnel construction equipment and construction technology has reached the leading level in the world. This has milepost for innovation and development of China's high-end equipment manufacturing in the construction field of significance.
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