沉箱偏心浮运安全性研究  

Floating safety of eccentric caisson

作　　者：李善新 LI Shanxin(Fourth Oil Extraction Plant Dagang Oilfield Co.,Ltd.,Tianjin 300280,China)

机构地区：[1]大港油田第四采油厂,天津300280

出　　处：《水运工程》2023年第8期51-55,共5页Port & Waterway Engineering

摘　　要：非轴对称沉箱在长距离浮运过程中可能出现结构偏心问题。基于沉箱在偏心状态下所受静水压力分布,利用力矩平衡法原理,得到偏心沉箱初始倾角的计算方法,并以吃水型宽比和偏心距型宽比为变量,计算出外形尺寸与质量分布对初始倾角的影响,最终根据沉箱的重力-浮力的几何关系推算出偏心沉箱的定倾半径,并总结了初始倾角及型宽吃水比对定倾半径的影响规律。该研究提供了沉箱偏心浮运的浮游稳定的计算方法,可为长距离沉箱浮运的安全储备评估提供依据。The non-axismetrical caisson may be eccentric in long distance floating transport.Based on hydrostatic pressure distribution of eccentric caisson,the calculation method of initial inclination angle is deduced by using the water pressure moment balance method,and the ratio of draft to width and eccentric distance to width are taken as variables to evaluate the effect of boundary dimension and distribution of mass on initial inclination angle.Finally,according to the geometric relationship between gravity and buoyancy of caisson,metacentric radius of eccentric caisson is calculated,and the influence law of initial inclination angle and ratio of width to draft on metacentric radius is summarized.This study provides a method for calculating the floating stability of caisson floating,which can provide a basis for evaluating the safety reserve of long distance floating transport.

关 键 词：偏心沉箱 定倾半径 浮游稳定 力矩平衡法 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]