地表注浆在浅埋黄土隧道中的应用与效果分析

结合鸳鸯会隧道实例，对地表注浆技术进行研究。通过数值模拟软件计算注浆前后围岩变形和塑性状态，分析隧道塌陷成因及注浆加固效果。注浆结束后，使用地质雷达检测注浆区域，了解注浆管分布及浆液扩散情况，排除注浆后围岩中不密实区域。施作初支后，对比拱顶沉降现场监测、回归分析以及数值计算结果，研究围岩长期变形趋势。结果表明，综合数值分析、雷达检测及现场监测分析，能够有效评价浅埋黄土隧道地表注浆加固效果。

Application of Surface Grouting in Shallow Loess Tunnel and the Effect Analysis

Depending on the practice in Yuanyanghui Tunnel, surface grouting technique was studied in such manner that the surrounding rock deformation and plastic state before and after grouting were calculated with numerical simulation software at first to study the tunnel collapse causes and the grouting reinforcement effect; then with ground penetrating radar, the grouting area was detected to know both how the grouting pipes were distributed and how the grout diffused so as to exclude the area not dense in the surrounding rock after grouting. After the initial support was exerted, the results from in-situ monitoring of vault settlement, regression analysis and numerical calculation were compared, thus the long-term deformation tendency of the surrounding rock was studied. The result shows that the analysis combining numerical simulation, radar detection and in-situ monitoring may give effective evaluation on the effect of surface grouting reinforcement on shallow loess tunnel.