沉井顶管施工中的技术预防措施  

Technical Precautions in Pipe Jacking Construction of Open Caisson

作　　者：冯佳庆 FENG Jiaqing(Shanghai Lingang Innovation Economic Development Service Co.,Ltd.,Shanghai 201306,China)

机构地区：[1]上海临港创新经济发展服务有限公司,上海201306

出　　处：《建筑施工》2020年第7期1277-1279,共3页Building Construction

摘　　要：由于沿海砂质土层的特点,在该土层中进行沉井制作、沉井下沉、顶管顶进等施工时,会遇到沉井制作渗漏,沉井下沉时超沉、下沉过快、顶管进出洞下沉等问题。对此,采取了相关施工控制措施,在保证施工质量的同时,减少了沉井倾斜、渗漏等问题,切实做好加固措施,保证了施工的顺利进行。总结的施工经验可为相关工程借鉴。Due to the characteristics of coastal sandy soil layer, during the construction of caisson fabrication, caisson sinking and pipe jacking in this soil layer, the problems such as caisson fabrication leakage, over sinking, too fast sinking, pipe jacking in and out of the tunnel sinking, etc. will happen occasionally. In this regard, relevant construction control measures have been taken to ensure the construction quality, reduce the inclination and leakage of open caisson, and take effective reinforcement measures to ensure the smooth construction. The summarized construction experience can be used as reference for related projects.

关 键 词：沉井顶管 井壁底板渗漏 沉井助沉纠偏 洞口加固 顶进纠偏 

分 类 号：TU99[建筑科学—市政工程]