摘要
由中交一航局施工的长江口深水航道治理二期工程北导堤NⅡB标段和NIIC-2标段的主要结构为全封闭半圆型沉箱。采用该种结构的堤身设计轴线总长度10 880 m,共使用单个长度为19.94 m的半圆型钢筋混凝土沉箱544个,沉箱单个质量约1 200 t,分4种规格。根据半圆型沉箱结构特点,半圆型沉箱的预制采用水平分层的施工方法,分三层四次浇筑。沉箱在预制台座上预制完成后,通过千斤顶组顶升,步行式液压顶推系统顶推,纵横移车运移,斜架车溜放,将沉箱从预制场出运下水。
The main structure of the north dike in the Yangtze Estuary Deepwater Channel Regulation Project Phase Ⅱ NIIB and NIIC-2 sections, which is completed by the FNEB, is semi-circular caissons. The 10880m long dike adopts totally 544 caissons of 19.94m unit length and 1200t or so unit mass, having four different specifications altogether. According to the characteristics of semi-circular caissons, the preeasting construction adopts horizontal construction joints to precast each caisson in 3 layers and jacked up by jacks, pushed by hydraulic pushing system, frame bogie into water for transport. 4 times. After precast on precasting yard, the caisson is moved by transition carriages and launched with inclined
出处
《水运工程》
北大核心
2006年第B12期82-88,共7页
Port & Waterway Engineering
关键词
半圆型沉箱
预制
出运
工艺
semi-circular caisson
precasting
launching
technology
