摘要
水下基槽边坡稳定坡率的确定对一些水下工程的安全性、经济性有重要影响。对基槽边坡的失稳模式和计算模式进行了探讨,并采用了基于条分原理的积分方法代替常规条分法计算合理坡率,提高了计算精度,同时,还给出了具体的比较算例分析水流速度对水下边坡稳定的影响。结果表明,将上、下部的坡率分别确定为1:2.5和1:2是经济合理的,同时,渗流对水下边坡稳定也是有利的,但当水流流速小于3m/s 时影响不大。
Suitable slope ratio of submerged trench is very important to the safety and cost of some underwater construction.In this paper,the calculating model of submerged trench is discussed.Instead of the traditional method,integral method based on circular slice theory is used to determine the optimum slope ratio,which can increase the accuracy and efficiency of calculation.At the same time,an example based on Xiamen immersed tube project is given to illuminate this method in contrast to the traditional one,and the effect of flow velocity on the stability of submerged slope is also analyzed.The results indicate that 1:2.5 and 1:2 are respectively the reasonable gradients for the upper and lower part of the slope,and seepage is advantageous to the stability of submerged slope,but this influence is inclined to be ignored when the flow velocity is less than 3 m/s.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第z1期2149-2153,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
数值分析
水下边坡
稳定性
计算模式
合理坡率
积分法
numerical analysis
submerged slope
stability
calculating model
suitable slope ratio
integral method
