槽渔滩隧道初期支护变形开裂施工处治

摘要

In allusion to deformation cracking of initial supports of left cavern section in Caoyutan Tunnel on Sichuan Leshan-Ya ’ an Expressway, this paper analyzes reasons of deformation cracking and takes measures of temporary reinforcement of initial supports, consolidation of wall rocks and permanent water shutoff, etc. in combination with actual conditions on site and results of monitoring and measurement to make treatment of deformation cracking sections reach the anticipated effect.%针对四川乐山至雅安高速公路槽渔滩隧道左洞段初期支护变形开裂情况，对变形开裂产生的原因进行分析，并结合现场实际情况及监控量测结果，采取临时加固初期支护、固结围岩并永久堵水等措施，使处治变形开裂段达到了预期效果。