探地雷达在基坑流砂掏空区探测中的应用

Application of GPR in the Detection of Foundation Ditch Quicksand Hollowing Out Area

随着城市建设规模的不断扩大,对非开挖岩土工程探测技术的研究和应用已日益迫切。探地雷达技术以其无损、快速、简便、高分辨率和经济的特点,正越来越引起岩土工程界的青睐。本文通过介绍探地雷达的基本原理,结合场地情况和探测任务,对探地雷达系统参数进行合理的设置,避开环境干扰,在基坑周围布置了测线。通过对采集的数据进行一系列的处理,得出分辨率较高,反射界面较为清晰的探地雷达剖面,证明了探地雷达对基坑流砂掏空区的探测是可行和有效的,对施工方采取相应的处理措施具有一定的指导意义。

With the increasing development of urban construction, the research and applications of trenchless technology in geotechnical engineering are urgently needed. Ground penetrating radar technology with nondestructive, fast, simple, high--resolution and economic characteristics, began to attract the attention. Based on the basic principle of ground --penetrating radar and the combination of the field and exploration tasks, this paper gives a reasonable design for ground penetrating radar system parameters , and lays the lines a- round foundation ditch, avoiding the environment interference. Through a series of data processing to the acquisition data, higher resolution and more clear reflection interface of GPR section has reached. It proves that the ground penetrating radar in the detection of foundation ditch quicksand hollowing out area is feasible and effective.