新桥建设后钱塘江海塘安全隐患探测与分析  

Detection and analysis of potential failure zone of Qiantang river seawall after the new railway bridge construction

作　　者：葛双成[1] 赵永辉[2] 陈永根 徐剑 刘超英[1] 王兴根[1] 

机构地区：[1]浙江省水利河口研究院,杭州310020 [2]同济大学,上海200092 [3]安吉县水利水电勘测设计有限公司,安吉313300 [4]浙江省钱塘江管理局勘测设计院,杭州310016

出　　处：《地球物理学进展》2013年第4期2148-2154,共7页Progress in Geophysics

基　　金：浙江省自然科学基金项目(Y5100019);上海市自然科学基金项目(09ZR1433500)联合资助

摘　　要：钱塘江某公铁两用大桥上游约20m处新建了一座铁路桥.如何评价新桥建设后的海塘内部质量现状,是否存在空洞等缺陷隐患,工程各方既重视又感困惑.本文在分析工程结构、新桥施工活动、堤身和堤基介质特点以及现有技术状况的基础上,采用了探地雷达、地震映像和瑞雷波法等探测方法.根据探测资料并结合海塘结构、地基特点及施工和运行中的具体情况,分析提出了铁路新桥建设后存在的可能对海塘安全运行有影响的堤身和堤基内部重点介质异常及潜在隐患.A new railway bridge was build at the upper reaches zone of the old rail-road bridge, and the distance between the two bridges is only 20 m. How to evaluate the situation of seawall inner body quality （voids in seawall body or not ） after the new bridge construction is still a great puzzle to engineers. Based on analysis on seawall structure, new bridge construction activities, mechanical parameters of seawall mediums and the development of different geophysical detection methods, integrated geophysical methods including Ground penetrating radar, seismic imaging and Rayleigh wave have been applied in this case study. Combined with seawall structure and the characteristics of new bridge construction activities, the influence caused by the construction activities has been discussed. Meanwhile, the important abnormal zones and hidden defects which can be harmful to the seawall after the new railway bridge construction,have been revealed by using integrated geophysical detection data.

关 键 词：铁路新桥 钱塘江海塘 隐患探测 雷达 地震映像 瑞雷波 

分 类 号：P631[天文地球—地质矿产勘探]