为解决临翔至清水河高速公路王家寨隧道第三系强富水粉细砂半成岩地层突涌灾害防治及施工难题，对隧道突涌灾害情况及机制进行分析，研究超前密管棚、水平高压旋喷桩、帷幕注浆等施工处治方案，并对洞内排水、地表深井降水等降排水方案的优缺点进行比较分析。依托王家寨隧道开展大量现场试验，建立“重地质、先降水、短进尺、强超前、辅注浆、快成环、勤量测”指导方针，总结出“地表深井降水+洞内综合排水+密管棚+密排小导管+周边注浆补强+四台阶五步交错开挖工法+快速应急响应”施工关键技术。现场实践表明：自2022年实施该施工技术以来，月均进尺逐步提升至36.5 m，较2021年月均进尺2.1 m提升了约16倍，基本解决了王家寨隧道突涌灾害防治难题，保障了隧道顺利施工。

To deal with the mud and water gushing disaster in Neogene waterrich semidiagenesis of fine sand in Wangjiazhai tunnel of LinxiangQingshuihe highway, the occurrence and mechanism of the mud and water gushing disaster are analyzed, the construction treatment schemes such as advance tight pipe shed, horizontal highpressure jetgrouting pile, and curtain grouting, and the advantages and disadvantages of drainage in the tunnel and surface dewatering by deep well are comparatively analyzed. Additionally, numerous field tests are conducted on the Wangjiazhai tunnel, a disaster prevention scheme of "prioritized geology, dewatering first, short footage, strong advance support, auxiliary grouting, fast ring forming, and multiple measurement" is established, and key construction techniques of "surface deep well dewatering, comprehensive drainage in tunnel, tight pipe shed, tight small conduit, surrounding 〖JP2〗grouting reinforcement, fourbench fivestep staggered excavation method, and rapid emergency response" are summarized. Site practice shows that the average monthly footage has gradually increased to 36.5 m, making a significant increase of about 16 times the average monthly footage of 2.1 m in 2021, which has essentially addressed the problem of mud and water gushing disaster in Wangjiazhai tunnel and ensured the rapid and successful excavation of the tunnel.