Construction Technologies for Deep Water Foundation of Lagos Rail Mass Transit Cross Sea Bridge
In order to overcome the construction difficulties of deep water ultra long pile foundation and pile cap for cross sea bridges in Africa,this paper takes the Lagos Rail Mass Transit(Blue line)Phase one project cross sea bridge in Nigeria as the research object.Based on the construction characteristics of long and large diameter pile foundation in deep water,the technology of deep sea ultra long steel casing sinking,conventional rotary drilling machine extended drilling rod technology,ultra long steel cage placement technology,ultra large volume concrete pouring technology,and improved mud technology are proposed;in response to the characteristics of large volume,heavy weight,and underwater operation of steel cofferdam,the block processing and transportation technology,the installation of steel cofferdam,and the pouring construction technology of pile cap are proposed.The results indicate that the proposed technology effectively ensures the smooth construction of bridges and has gained experience in deep water construction with ultra long foundations,playing a demonstrative and reference role for the promotion of Chinese bridge construction technology in West Africa.
light-railway linecross sea bridgedeep water foundationsteel cofferdampile cap
NETL
NSTL
万方数据
