摘要
对某隧洞工程在高水压作用下的受力情况进行了分析,为了取得合理的受力断面,对五种断面形状进行了有限元建模计算。并分别以孔边最大的切向应力(绝对值)最小和塑性区面积最小为准则对五种断面进行了优选。两种准则得出相同的最佳断面形式为蛋壳形。此外对隧洞注浆加固圈的性质也进行了分析研究,并以蛋壳形断面形状为例,对不同的注浆加固圈厚度进行了计算,得出隧洞所需的最小注浆加固圈厚度为一倍洞径长度。
This paper analyzes the stress of some subsidiary tunnel under high water pressure. In order to get proper cross section, five cross section models are founded and calculated by the method of finite dement. The optimal shape among these five cross sections is determined by the criteria of minimum tangential stress＇ absolute value and the minimum plastic area. The egg shape is the optimal crees section slape according to these two criteria. The property of grouting reinforced region is studied as well. The different thickness of grouting reinforced region for egg shape crees section is calculated. The minimum thickness of grouting reinforced region is determined by researching its property. The minimum thickness should be equal to the diameter of tunnel.
出处
《地下空间与工程学报》
CSCD
2005年第5期713-716,共4页
Chinese Journal of Underground Space and Engineering
关键词
隧洞
断面形状
塑性区
注浆加固圈
tunnel
shape of cross section
plastic zone
grouting reinforced region
