| 21st century is one for underground space. Communications, water conservancy, hydropower. excavations as well as utilization of urban underground space put forward a higher demand for tunnel and underground engineering in quantity, quality and technology, along with the development of economy, science and technology.Because of the development and improvement of construction technique and equipment in tunnel and underground engineering, the tunnel construction technology is gradually growing up in large cross section, complicated geological conditions. Construction of various urban underground engineering, deep-buried tube work, large span highway (railway) tunnel are greatly improving tunnel construction technology. At the same time, some new techniques and methods, which may offer a broader perspective for reasonable tunnel design and efficient usage of urban underground space, are also improving and developing. Advanced techniques and methods are influencing and promoting the design change of underground engineering .For large cross section tunnel under complicated geological conditions with high technical and construction difficulty, it is very important to select construction scheme, equip construction facilities, monitor and measure in construction process, and apply information and construction technology .They directly determine the quality, construction safety and the service life cycle of the structure.Aiming at the construction characteristics of the large cross section railway tunnel under the shallow-buried bias and weak swelling rock conditions, this thesis sums up various corresponding construction measures and methods and introduces in detail the construction scheme and strategy of portal shallow-buried bias section and the weak swelling rock of Heisongyi Tunnel which is designed for double tracks and layers container. The result and application of the construction monitoring, measurement, the information design and the construction technology are also described. |
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