应用探地雷达探测江堤挡土墙下砂土的局部淘空区  

GPR Detection of Local Undercutting of Sandy Soil Under Retaining Wall at Fluctuation Area

作　　者：凌云[1] 过兴发 

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]南通港口集团有限公司,江苏南通226006

出　　处：《水运工程》2006年第11期112-115,共4页Port & Waterway Engineering

基　　金：国家计委高技术应用部门发展项目

摘　　要：介绍长江某港临水侧挡土墙底板下砂土在潮水反复升降作用下局部淘空的探地雷达探测结果。该工程与挡土墙相邻的新建防汛墙在高潮位时曾发生管涌的事故。探测结果表明,新建挡土墙底板下,测线3～10 m和27～39 m区间,未见明显渗漏隐患,墙下土层基本密实和均匀;在10～26 m区间,与挡土墙底板接触处的土质非常松散,局部可能脱空,存在较明显的渗漏孔洞。探测结果与现场观测到的墙后砂土局部流失和外侧护坡顶面局部发生沉陷的结果一致。The GPR detection and analysis of local undercutting of sandy soil under retaining wall at fluctuation area is introduced. The sand boil under flood protecting wall adjacent to the retaining wall used to occur before GRP detection. The detecting results indicate that the soil under retaining wall between 3-10 m and 27-39 m is uniform and compact, without leakage. However, the soil between 10-26 m is very loose and possibly undercutting in local area, and obvious leakage cavities exist. The detection result is in conformity with that of site observation data.

关 键 词：挡土墙 淘空 地质雷达 探测 

分 类 号：TN959.1[电子电信—信号与信息处理]