獅子嶺隧道下穿龍峰山莊別墅密集區(qū)爆破減震綜合技術(shù)試驗(yàn)研究
[Abstract]:In view of blasting shock absorption and safety construction of many kinds of intersecting tunnel in mountainous area, taking the Liangling tunnel project of Jinwen railway as the background, the safe and rapid construction technology of large section, shallow buried depth, multi-interference and multi-crossing tunnel is studied. The main work and research results are as follows: (1) on the basis of summing up the construction experience, a set of safe and rapid construction techniques for the existing construction (construction) under the tunnel and for the existing building (construction) are formed. (2) numerical simulation analysis of blasting construction in the dense area of Longfeng Villa under the Jishongling Tunnel shows that, In the course of blasting excavation, the maximum principal stress of surrounding rock appears in the arch and inverted arch of the tunnel, and the minimum principal stress usually occurs at the arch of the arch near the blasting surface. At the same time, the plastic zone of the tunnel is mainly concentrated on both sides of the arch shoulder. With the excavation, the plastic zone diffuses from the arch shoulder through the arch waist to the arch foot. After excavation, the plastic zone is mainly concentrated in the area from the arch waist to the arch foot on both sides of the tunnel. The range of plastic zone is related to the span of tunnel. (3) aiming at the influence of blasting construction on the existing buildings above the new tunnel, The proposed annular stratified and horizontal layered blasting damping models have great effect on reducing the disturbance of the existing building (construction) on the ground surface during the tunnel blasting construction. Under the condition of this model, the surface settlement is less affected by blasting excavation, which shows that blasting damping and reinforcement design play a great role. (4) Real-time monitoring of blasting vibration response following construction shows that, In the complex construction environment, the vibration absorption models of annular layered and horizontal layered blasting are presented, which embody the design concept of double coupling of shock absorption and isolation, and reach the expected goal.
【學(xué)位授予單位】:西安建筑科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:U455.4
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