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随着社会的高速发展,城市人口速度膨胀,交通拥堵问题日益突出,已经制约了社会的良性发展和影响了城市居民的日常生活。在全国各地大型城市大干地铁的背景下,兰州市轨道交通1号线应运而生,兰州市地处我国西北地区,属于黄土高原上游,轨道交通1号线东部市场站~拱星墩站区间隧道洞身穿越了具有明显代表的湿陷性黄土层。湿陷性黄土具有吸水沉陷特性,盾构掘进过程中控制不当易造成路面塌陷,从而影响城市交通。
With the rapid development of society, the urban population has been expanding at an accelerating pace and the problem of traffic congestion has become increasingly prominent. This has restricted the healthy development of the community and affected the daily life of urban residents. Lanzhou City Metro Line 1 came into being in the context of Dagang Metro, a large city across the country. Lanzhou City is located in the northwest of China and belongs to the upper reaches of the Loess Plateau. The eastern market station of Metro Line 1 to Gongxingdun Station The tunnel hole passes through a well-represented collapsible loess layer. Collapsible loess has the characteristics of water absorption and sinking, shield tunneling in the process of improper control can easily lead to road collapse, thus affecting the urban traffic.