论文部分内容阅读
青藏铁路是世界上海拔最高的铁路,全长1142km,其中有550km要经过多年冻土区.“高原”问题、“冻土”问题和“环保”问题是建设青藏铁路的3个关键技术问题.结合青藏铁路的建设,进行了一系列球状药包爆破漏斗试验、柱状药包爆破漏斗试验和中深孔爆破开挖试验,得出了对青藏高原冻土影响最小的爆破参数.同时,在对多年冻土进行爆破开挖的过程中,采取了一系列措施,防止冻土热融和边坡滑坍.通过对爆破开挖的冻土进行监测,发现经过8个月的时间冻土可以恢复到初始状态.
The Qinghai-Tibet Railway is the highest railway in the world with a total length of 1142km, of which 550km passes through the permafrost zone. The issues of “plateau”, “frozen soil” and “environmental protection” are the construction of the Qinghai-Tibet Railway Three key technical issues.Combined with the construction of the Qinghai-Tibet Railway, a series of spherical packet blasting funnel test, cylindrical packet blasting funnel test and medium-long-hole blasting excavation test obtained the least impact on the Qinghai-Tibet Plateau frozen soil blasting Parameters.At the same time, in the process of blasting and excavating permafrost, a series of measures have been taken to prevent the hot melt of the frozen earth and the slump of the slope.Through the monitoring of the frozen soil excavated by blasting, it is found that after 8 months Time permafrost can be restored to its original state.