沈应线隧道工程位于较为繁华的舟山沈家门城区，长1230m，其南北出入口地质很差，多为全～强风化岩层的粘性土夹砾石，围岩稳定性差，主要通过理论计算、进度要求及方便施工等方面的比选，确定了适用于该工程洞口段的开挖技术方法。同时，介绍了洞口浅埋段的实际施工方案及效果。

Shengyingxian tunnel, being 1230m long, is located in the busy Shengjiamen urban area in Zhoushan. The geological conditions of the north entrance section and south entrance section of the tunnel are very poor, where most of the ground is fullyweathered～heavilyweathered cohesive soil containing gravels. The surrounding ground of the tunnel has poor selfsupport ability. On basis of theoretical calculations and the requirements of the construction progress and construction convenience, excavation technology suitable for the portal sections of the tunnel is determined. Furthermore, the article also presents the actual construction scheme and construction results of the shallowburied portal sections.