摘要
采用围岩与结构共同变形的计算模式,优选出圆梁山隧道在高压涌水条件下的合理支护结构形式。通过对圆梁山隧道注浆加固圈单独承载稳定性分析,拟定出圆梁山隧道所需加固圈的最小尺寸为3m。通过对38种工况模型的弹塑性数值计算,找出了在满足相同结构安全度要求K=2.4条件下,随着注浆加固圈厚度增加,可相应减薄二次衬砌所需厚度的关系曲线。此外,研究结果还表明,提高注浆水平能较大程度地减弱支护结构参数。因此,改善注浆水平是有很大意义的。
Based on the model of structure and surrounding rock mass co-deformation,the reasonable optimum supporting structure parameters are determined for Yuanliangshan railway tunnel. Through stability analysis of bearing capacity of grouted region around the tunnel,the minimum size of reinforced region is proposed to be 3 m. On the basis of elasto-plastic FEM calculation for 38 cases,the relationship curves can be obtained of the size of grouting reinforced region versus the thickness of secondary lining with the secondary lining safety factor =K2.4. In addition,the results demonstrate that the higher level grouting can be used to reduce the supporting structure parameters.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第5期763-769,共7页
Chinese Journal of Rock Mechanics and Engineering
关键词
隧道工程
高水位
支护结构
注浆加固圈
tunneling engineering,high water head,support structure,grouting reinforced region
