The application of a sprayapplied waterproof membrane in the case of the liquefied natural gas (LNG) unloading line tunnel constructed via the New Austrian Tunneling Method (NATM) is described. The waterproof standards for the LNG unloading line tunnel are stricter than those for regular tunnels based on the consideration of safety and environmental protection during operation. A doublelayer waterproofing system including radial grouting, systematic drainage facilities, an EVA sheet membrane, a sprayapplied acrylate waterproof membrane and other waterproofing and drainage facilities are designed based upon comparisons among several possible waterproofing solutions. The application results and consequential observations prove that the outcome of this waterproof system is satisfactory. The important issues for the successful application of the sprayed membrane in this case are summarized, including a reasonable design for the waterproofing system, performance of the sprayed membrane, proper training for the operators, adequate preparations, careful execution, and complete quality control and acceptance. The successful application of the sprayapplied acrylate waterproof membrane combined with other waterproofing and drainage facilities in this case has been demonstrated according to the inspection results and provides alternative solutions to improve the waterproof quality of similar tunnels under high standards.

为解决液化天然气（LNG）接收站LNG工艺隧道的高标准防水问题，在新奥法建造的LNG工艺隧道中采用包含喷膜防水层的复合防水层体系。基于运营过程中安全环保的考虑，LNG工艺隧道的防水标准比常规隧道更为严格。通过比较几种可能的防水方案，设计了包括径向灌浆、排水系统、EVA防水板、丙烯酸盐喷膜防水层以及其它防排水设施的双层防水系统。通过实际施工结果和后续的观察，该隧道的防水实施效果良好。本隧道中喷膜防水技术成功应用的重点在于：合理设计的防水系统、喷膜防水层的性能、施工人员技术培训、充分的准备工作，认真执行和完善的质量控制和验收。丙烯酸盐喷膜防水技术与其他防排水措施相结合的成功运用，为达到类似高标准隧道的防水质量提供了解决方案。