强透水砂层深基坑开挖薄壁沉井支护施工技术

结合京沪高速铁路三标荆河特大桥河中墩深基坑开挖施工实例，介绍了深基坑开挖薄壁沉井防护施工技术，具体阐述了水中墩施工难点，薄壁沉井的特点，具体施工方法及事故处理措施等，为同类工程积累了宝贵的施工经验。

The supporting construction technology of excavating the thin wall caisson at deep foundation pit of strong permeable sand bed's

Combining with the excavation of deep foundation pit on Beijing-Shanghai high-speed railway, three standardization Jing river extra large-sized bridge river pier, it introduces the protective construction technology of excavating the thin wall caisson at deep foundation pit. It presents the difficulties of constructing the pier in water, the characters of thin wall caisson, the specific construction methods, the treating measures and so on. It accumulates the valuable experience for the similar projects.