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黄河中游黄土高原地区的黄土分布为,西起贺兰山,东至太行山,北起长城,南至秦岭,面积约为27万平方千米。通过对已有文献资料的搜集和已建、在建黄土隧道的调查发现,由于黄土自身存在的特殊性,导致较多黄土隧道在施工中出现不同程度的地表裂缝,已建平顶高速公路卧龙隧道、平顶高速公路静宁隧道、国道312线祁家大山隧道、西过境公路大有山隧道,出现地表裂缝,在建的国道305线黑城至海原公路赵家山隧道也出现地表裂缝。对赵家山隧道和其他隧道的地表裂缝进行说明,并总结施工控制点。
Loess Plateau in the middle reaches of the Yellow River Loess distribution, west Helan Mountain, east Taihang Mountains, north from the Great Wall, south Qinling, an area of about 270,000 square kilometers. Through the collection of the existing literature and the survey of the loess tunnel under construction, it is found that due to the particularity of the loess itself, more loess tunnels have different degrees of surface cracks during construction and the Wolong Tunnels, Pingdingshan Jingning Tunnel, State Road 312 Qijia Dashan Tunnel, West Transit Highway Dayama Tunnel, there are surface cracks, under construction State Road 305 Black Mountain to Haiyuan Zhaojiaoshan tunnel tunnel also appeared cracks. Describe the surface cracks in Zhaojiashan Tunnel and other tunnels and summarize the construction control points.