新建黄土隧道仰拱开裂原因与处治技术

Causes and Treatment Technology of Cracking on Inverted Arch of New-built Loess Tunnel

以山西省吉河高速公路某黄土隧道为工程背景,分析了隧道仰拱填充层纵向裂缝的特征及产生纵向裂缝的原因,并采取了针对性的处治措施。监控量测结果表明,处治后仰拱结构稳定。通车运营多年来,病害处治段落未出现路面纵向裂缝、错台等病害情况,表明采取的病害处治方案科学,处治效果明显。研究结果对建设期和运营期黄土公路隧道类似病害的处治具有指导价值和借鉴意义。

Based on a loess tunnel on Jihe Expressway in Shanxi Province, the characteristics and the causes of the longitudinal cracks on the filling layer of the inverted arch are analyzed, and targeted treatment measures are taken. The monitoring measurement results show that, the structure of the inverted arch is stable after the treatment. Over years of operation, there are no longitudinal cracks on pavement or faulting of slab ends in disease-treating sections, which indicates the disease treatment scheme is scientific and effective. The research results can provide guiding and reference value for treating similar diseases of loess highway tunnels under construction and operation.