广湛客专湛江湾海底隧道工程极限冲刷深度预测  

Prediction of Maximum Scouring Depth for the Zhanjiang Bay Subsea Tunnel Project of the Guangzhou-Zhanjiang Passenger Rail Line

作　　者：蓝霄峰 张金明 郑国贤 LAN Xiao-feng;ZHANG Jin-ming;ZHENG Guo-xian(Pearl River Water Resources Research Institute,Guangzhou 510611,China;Key Laboratory of the Pearl River Estuary Regulation and Protection of Ministry of Water Resources,Guangzhou 510611,China)

机构地区：[1]珠江水利委员会珠江水利科学研究院,广州510611 [2]水利部珠江河口治理与保护重点实验室,广州510611

出　　处：《广东水利电力职业技术学院学报》2024年第2期1-4,共4页Journal of Guangdong Polytechnic of Water Resources and Electric Engineering

摘　　要：湛江湾是在遂溪河谷基础上经海侵发育起来的潮汐汊道型溺谷海湾,湾内水深大,深槽内水流动力强,水流挟沙力大。基于河道地质条件、泥沙组成及水动力特征,利用水工模型试验手段,预测不利水文条件下隧址河段河床的最大冲刷深度。研究成果表明,以潮为主情况下,隧址河床未产生冲刷;以洪为主情况下,工程河段主槽冲刷后深泓线平面位置无变化,深泓冲深0.00~1.06 m。预测的极限冲刷深度可为过海隧道的科学埋设提供依据。Zhanjiang Bay is a tidal-inlet type drowned valley bay formed on the basis of the Suixi River valley,with deep waters and strong hydrodynamic forces within its deep channels,causing significant sediment transport.Based on the geological conditions of the river channel,sediment composition,and hydrodynamic characteristics,hydraulic model testing methods were used to predict the maximum scouring depth of the riverbed at the tunnel site under adverse hydrological conditions.The results indicate that under predominantly tidal conditions,no scouring occurs on the tunnel site riverbed.Under predominantly flood conditions,the plane position of the thalweg in the main channel of the engineering section shows no change after scouring,with a scouring depth of thalweg ranging from 0.00 to 1.06 meters.The predicted maximum scouring depth can provide evidence for the scientific hypothesis of the subsea tunnels.

关 键 词：潮汐汊道 溺谷海湾 海底隧道 极限冲刷 模型试验 

分 类 号：U452[建筑科学—桥梁与隧道工程]