摘要
依托福建漳龙高速公路后祠隧道新(扩)建工程,开展现场围岩实时动态监控量测,研究拱顶沉降、洞周收敛的变化规律。同时,基于有限元软件ABAQUS建立三维数值仿真模型,研究隧道开挖和支护后围岩稳定性的变化规律,并针对锚杆长度、纵向间距二个支护参数进行正交实验设计,并进行支护参数优化分析研究,得出一些有益的结论。研究结果可为后续隧道扩挖和支护方案选择提供依据,也为今后类似隧道工程的建设提供参考。
The real time monitoring program on the rock mass was implemented in the Houci Tunnel excavation of Zhanglong Expressway in Fujian Province. The objective of the instrumentation program was to monitor the deformations at crest and walls at both sides of the excavated tunnel. The three-dimensional finite element analysis model was established to simulate the rock mass deformations before and after tunnel excavation. Further, both the length and the spacing of the ground anchor were optimized from the numerical analysis and the results can be applied for the support of the tunnel excavations.
引文
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