Tunnel boring machine (TBM) is a new type of advanced tunnel construction machinery, which uses rotary cutter to excavate, break the surrounding rock and drive at the same time to form the whole tunnel section. Its characteristics are high speed, safety, economy and high quality.
20 14 12.27 The first domestic large-diameter full-face hard rock tunnel boring machine (open TBM) with independent intellectual property rights was successfully rolled off the production line in Changsha, Hunan. Its successful development has broken the long-term monopoly of foreign countries in this field and filled the gap in the development of large-diameter full-face hard rock tunnel boring machine in China.
Large-diameter full-face hard rock tunnel boring machine is often used in long hard rock tunnel construction, which is a complete set of tunneling equipment integrating tunneling, supporting and slag discharge. Because it requires high reliability and long service life of equipment, it is called "aircraft carrier" and "king of roadheader" of construction machinery. For more than a century, the core technology of the equipment has been monopolized by foreign countries, and the domestic TBM relies entirely on imports.
In order to achieve a breakthrough in equipment manufacturing technology, China Railway Construction Heavy Industry Group, supported by the national "863 Plan" project and combined with the geological conditions of experimental engineering, carried out key technical and scientific research, broke through the core technologies such as diameter TBM, high power and variable load, and successfully developed the first large-diameter full-face hard rock tunnel boring machine (open TBM) in China that reached the international advanced level.
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China's railway construction, highway traffic, water conservancy and hydropower, urban rail transit, mine construction, large-scale gas transmission, power transmission, water transmission and other infrastructure construction have great demand for TBM market, and large-diameter TBM will also be widely used in various fields.
China's first large-diameter full-face hard rock tunnel boring machine (open TBM) with independent intellectual property rights went offline, which was used for the national key project-the water supply project for the central city of Jilin Province, with a tunneling length of 23 kilometers, and the project was mainly located in hills.
According to the geological characteristics and technical difficulties of the main tunnel of water diversion and water supply project in central Jilin Province, which is characterized by long distance, large buried depth, high stress, high water pressure, high ground temperature, large water inflow and easy rock explosion, the large-diameter TBM transforms the tunnel excavation with high intensity, high risk and high pollution into a relatively safe and efficient green construction mode, which meets the requirements of fast, high quality, high efficiency, safety, environmental protection and highly integrated tunnel construction.
References:
Baidu encyclopedia-tunnel boring machine
People's Network-the first large-diameter full-face hard rock tunnel boring machine off the assembly line in China