摘要
爆破挤淤法作为一种高效率的软土地基处理方法,被广泛应用于淤泥等软土的地基处理中。该方法中抛填石的落底深度是评判其地基处理效果的重要指标,而与其他探测技术相比,地质雷达能够适应复杂的工程环境,具有探测效率高、操作简便、图像分辨率高、对目标无损性和较强的抗干扰能力等优点。以福建宁德某潮间带爆破挤淤法地基处理为例,采用了地质雷达探测技术对现场爆破挤淤法处理后的软土地基进行抛填石落底深度探测分析,而在地质雷达的实际探测应用中,存在着雷达波形图判断困难、主观经验依赖性强等问题,故采集该路段长期雷达检测图像,结合实地钻孔取芯的数据,辅以路基沉降,分析地基处理效果。证明了采用低频天线可用于探测深厚淤泥层,且地质雷达探测技术能在少量钻探资料的支持下,完成对地基处理效果的评价。
As a high-efficiency soft soil foundation treatment method,the explosive replacement method is widely used in the treatment of soft soil such as silt.In this method,the bottom depth of rock dumping is an important index for judging the effect of ground treatment.Compared with other detection techniques,ground penetrating radar(GPR)can adapt to complex engineering environments,and has the advantages of high detection efficiency,simple operation,high image resolution,nondestructive to the target and strong anti-interference ability.In this work,taking the foundation treatment of an intertidal zone in Ningde,Fujian Province,as an example,the GPR detection technology was used to detect and analyze the depth of rock-filling on the soft soil foundation treated by the on-site explosive replacement method.However,in the actual detection application of GPR,there are problems such as the difficulty in judging the radar waveform diagram and the strong dependence on subjective experience.Therefore,the long-term radar detection images of this road section were collected,combined with the data of field drilling and coring,supplemented by subgrade settlement,and the effect of foundation treatment was finally analyzed.It is proved that the low-frequency antenna can be used to detect the deep silt layer,and the geological radar detection technology can complete the evaluation of the foundation treatment effect with the support of a small amount of drlling data.
作者
肖广锋
杨善翩
秦伟
王军
陈文斌
XIAO Guang-feng;YANG Shan-pian;QIN Wei;WANG Jun;CHEN Wen-bin(Zhejiang Communications Construction Group Co.,Ltd.,Hangzhou 310012,Zhejiang,China;Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province,Wenzhou University,Wenzhou 325035,Zhejiang,China)
出处
《地基处理》
2023年第4期332-338,共7页
Journal of Ground Improvement
基金
浙江省公益技术应用研究项目(LGF22E080011)
温州市基础性科研项目(S20210005)
浙江省教育厅一般项目(Y202044146)
浙江省教育厅专硕项目(Y202146757,Y202248922)
温州大学硕士研究生创新基金项目(No.316202002070)。
关键词
爆破挤淤
抛石
地质雷达探测
路基沉降
钻孔取芯
explosive replacement method
riprap
ground penetrating radar(GPR)
subgrade settlement
drilling cores
