“南海Ⅰ号”钢沉井下沉分析

Analysis of sinking of steel open caisson in "Naihai Ⅰ"

在"南海Ⅰ号"打捞工程中,古沉船在泥面下1 m左右,施工中采用钢沉井直接罩在古沉船上。分析钢沉井利用静压下沉到泥面下12 m的可行性。由于地质勘察报告产生的误差,导致在实际静压过程中所需要的静压力远远大于理论计算的静压力,通过采用有效的方法来解决施工中的难题,使得钢沉井下沉到位。

In the salvage of ＂Nanhai Ⅰ ＂ the ancient wrecked ship is 1 m below the mud surface. Steel open caisson is adopted to cover directly the wreck. The feasibility of sinking of the steel open caisson to 12 m below the mud surface under the static pressure is analyzed. Due to the error of the geologic reconnaissance, the static stress needed in the project is far larger than the value calculated by the theory. By taking an effective method, the problem was solved and the steel open caisson was sunk into the expected position.