不排水下沉施工技术在市政沉井工程中的应用

THE APPLICATION OF NON DRAINAGE SINKING CONSTRUCTION TECHNOLOGY IN OPEN CAISSON ENGINEERING OF MUNICIPAL ENGINEERING

为解决软弱地层中高地下水位的市政工程沉井施工力学性能问题,以某市政工程污水处理厂主干管网过河顶管工程沉井施工为研究对象,针对不排水条件下市政工程沉井施工工艺,以现场监测为主要手段,观测沉井下沉过程中的侧壁摩阻力和土压力变化过程。研究成果可为厚层软弱土层中高地下水位的市政工程沉井施工提供参考。

In order to solve the problem of mechanical performance of municipal engineering open caisson construction with high groundwater level in soft strata,the open caisson construction of the river crossing pipe jacking project of the main pipe network of a municipal engineering sewage treatment plant is taken as the research object.Aiming at the open caisson construction technology of municipal engineering under the condition of undrained water,field monitoring is taken as the main means to observe the change process of sidewall friction and soil pressure during the sinking process of the open caisson.The research results can provide reference for the construction of open caisson of municipal engineering with high groundwater level in thick soft soil layer.