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随着我国公路建设日新月异,隧道建设项目日益增多。在隧道施工建设中常会遇到浅埋地层松散软弱,破碎围岩带等不良地质段。由于浅埋地层埋藏较浅,大都是风化破碎的隧道围岩,受力复杂,导致围岩和支护应力分布和变形非常复杂,尤其是在地形起伏较大的丘陵地带,在隧道施工中,面临更为复杂的围岩应力分布和衬砌受力变形状况,增加了设计和施工难度。
With the rapid development of highway construction in our country, the number of tunnel construction projects is increasing. In the construction of tunnel construction often encounter shallow loose shallow, broken rock belt and other adverse geological section. As shallow buried shallow formations are mostly weathering and crushing tunnel surrounding rock, the force is complex, resulting in the surrounding rock and support stress distribution and deformation is very complex, especially in the hilly terrain larger in the tunnel construction, Faced with more complex stress distribution of surrounding rock and lining deformation, increasing the difficulty of design and construction.