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本文结合沉管隧道工程实例,介绍沉管隧道其分项工程管段预制的施工技术,以及施工过程中对预制质量的控制。管段预制是沉管隧道施工的主要环节,对其施工技术、预制质量的要求较高。管段预制结构的尺寸、预埋件安装精度、混凝土容重及干舷值控制直接关系到管节浮运、沉放。管段预制混凝土应满足不渗、不裂、不漏的设计要求,并保证其耐久性及使用寿命的设计要求。因此,在管段预制施工过程中施工技术对质量的控制及保证尤为重要。
In this paper, the project of immersed tunnel is introduced to introduce the construction technology of the sub-project of the immersed tunnel and the control of prefabricated quality during construction. Pipe precasting is the main part of immersed tunnel construction, which requires high quality for its construction technology and prefabrication. Pipe prefabricated structure size, embedded parts installation accuracy, concrete weight and freeboard control directly related to the pipe float, sinking. Precast concrete pipe should meet the impermeable, crack, leak-free design requirements, and to ensure its durability and service life of the design requirements. Therefore, it is very important to control and guarantee the quality of construction technology in the process of pipe prefabrication.