Abstract: Shaft construction in silty clay is characterized by abundant groundwater and easy collapse of shaft wall. And it is more difficult in rainy season. Dewatering and drainage are the keys of shaft construction. This paper introduces the design of supporting structure of shaft in silty clay stratum, expounds the methods of dewatering and drainage of shaft foundation pit during construction, and discusses the excavation method of shaft and the specific contents of monitoring during construction. The construction plan presented in this paper can ensure the safety of shaft construction in unfavorable geological conditions during rainy season.

Key words: shaft, rainy season, clay condition, construction plan

摘要： 粉质粘土地质条件下的竖井施工具有地下水丰富、井壁易坍塌的特点，雨季施工难度更大，做好降水和排水是竖井顺利施工的关键。针对此类竖井的特点，介绍了粉质粘土地层中竖井的支护结构设计，阐述了施工期竖井基坑降水和排水方法，讨论了井身土层开挖方法和施工期监测的具体内容，给出的施工方案能够确保不良地质条件下竖井雨季施工安全。

关键词: 竖井, 雨季, 粘土条件, 施工组织