对“滇西红层”山区不良地形、地质条件 ,总结大保高速公路隧道进洞技术和经验 ,对在山区不良地形、地质条件下的隧道进洞措施进行探讨 ,其中采用的接长明洞、反压回填、桩基偏压明洞、先主动回填后进行开挖等措施 ,对成功处治进洞病害 ,保障隧道结构及施工安全起到了积极的作用 On the bad terrain and geological conditions in the mountainous area of ​​“Red West of Yunnan Province”, this paper summarizes the tunneling technology and experience of Dabao Expressway tunnel, discusses the measures of tunneling into the tunnel under the bad terrain and geological conditions in mountainous area, , Back pressure backfill, pile foundation bias Myongdong, the first active backfill after excavation and other measures for the successful treatment of the hole disease, to protect the tunnel structure and construction safety played a positive role