输油管道在海底软土中的受力分析研究  

Stress analysis of oil pipelines in submarine soft soil

作　　者：熊海荣[1] 李旭[1] 赵玉田 安晓宇[3] 张宇亭[3] XIONG Hai-rong;LI Xu;ZHAO Yu-tian;AN Xiao-yu;ZHANG Yu-ting(CNOOC Offshore Oil Engineering Co.Ltd.,Tianjin 300451,China;Shanghai Communications Construction Co.Ltd.,Shanghai 200136,China;Tianjin Research Institute for Water Transport Engineering,National Engineering Research Center of Port Hydraulic Construction Technology,Tianjin 300456,China)

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]上海交通建设总承包有限公司,上海200136 [3]交通运输部天津水运工程科学研究所港口水工建筑技术国家工程研究中心,天津300456

出　　处：《水道港口》2023年第2期270-278,共9页Journal of Waterway and Harbor

基　　金：国家自然科学基金项目(51978305);中央级公益性科研院所科研创新基金项目(TKS20220102)。

摘　　要：利用离心模型试验、三维数值模拟方法和拟合公式方法对12寸输油管道的侧向管土相互作用问题开展研究。研究结果表明:不同工况条件下,管道侧向运动的土体抗力曲线均随位移呈现硬化型曲线。随着管重的增加,破土抗力增加。破土抗力方面,水压试验和操作工况比安装工况分别增加44.87%和18.72%;u/D=2.5时的侧向抗力,则分别约增加38.11%和13.05%。针对不同工况,基于前人研究成果进行公式参数的修正,得到了侧向运动条件下的土抗力计算方法,可以较好地反映实际工程的土抗力发挥情况。Three-dimensional numerical simulation method and fitting formula method were used to study the lateral pipe-soil interaction of a 12-inch oil pipeline.The results show that under different working conditions,the soil resistance curve of the lateral pipeline movement presents a hardening curve with displacement.With the increase of pipe weight,the resistance to ground breaking increases.In terms of ground breaking resistance,compared with the installation condition,the test and operation conditions increase by 44.87%and 18.72%,respectively.When u/D equals to 2.5,the lateral resistance has an increment of around 38.11%and 13.05%,respectively.In addition,according to different working conditions,the formula parameters were modified based on previous research results,and the calculation method of soil resistance under lateral movement was obtained,which can better reflect the performance of soil resistance in practical engineering.

关 键 词：输油管道 软土 管土相互作用 三维有限元模型 土抗力 

分 类 号：U173[交通运输工程]