摘要
采用ANSYS软件分别对圆形断面、矩形断面、直墙圆拱形断面、蛋壳形断面形状的水工隧洞开挖进行了有限元分析计算。通过各种断面隧洞开挖后的位移、应力和塑性区的分析,对四种断面形状进行了优选。结果表明:圆形断面隧洞洞顶出现的沉降量最小,洞周应力分布均匀,出现的最大拉应力最小;矩形隧洞洞周围岩的沉降值和最大拉应力最大,应力集中程度和塑性区范围也最大;蛋壳形隧洞的洞周位移应力值和塑性区范围仅次于圆形隧洞。综合考虑隧洞的使用空间、造价等因素后,认为蛋壳形断面是最合理的隧洞断面形状。
This paper analyzes the stress of tunnels with circular cross-sections,rectangular cross-sections,straight walls and arch cross-sections and egg cross-section by ANSYS software respectively.The optimal shape among these four cross-sections is determined by the displacement,stress and the plastic zone.The results indicate that the circular cross-section tunnel has the smallest displacement and tensile stress and that the rectangular cross-section tunnel has the maximum displacement,tensile stress and plastic zone,so does the stress concentration.And the displacement,tensile stress and the plastic zone of the egg shape tunnel is only next to the circular shape tunnel.After considering the factors of tunnel available space and costs,egg shape tunnel is the optimal cross section shape.
出处
《中国农村水利水电》
北大核心
2011年第1期102-104,107,共4页
China Rural Water and Hydropower
