Aimed at the problems of road surface collapse frequently appearing in some cities of our country,the reason for surface collapse of a road was analysed,taking experimental geophysical exploration research work,and the ground penetrating radar method and seismic imaging method were selected and applied into the construction,whose purpose was to provide the basis for the subsequent management of surface subsidence for urban road.With the test of these two methods in 7 GPR profiles and 2 seismic reflection profiles,it can be learned that,ground penetrating radar method and seismic imaging method have effects on the pipe hole detection,etc.,the ground penetrating radar method(GPR) has higher resolution,and the reaction of abnormal characteristics is more obvious;method of ground penetrating radar(GPR)detection in urban areas is vulnerable to environmental disturbance,and seismic reflection method has strong anti-jamming capability,whose exploration depth is large;ground penetrating radar method and seismic imaging method should be used comprehensively to select the best construction parameters and verify each other,and improve the precision of interpretation.It has been confirmed that the above method is effective and feasible in exploration of surface collapse for urban road,and the method can provide a strong basis for the controlling of surface collapse for urban road.%针对我国一些城市频现路面塌陷的问题,对某处路面塌陷成因进行分析,采用试验性质的物探工作研究方法,选取了探地雷达法和地震映像法施工,对后续城市道路面沉降的治理提供依据.经过7条探地雷达剖面和2条地震映像剖面试验工作,得知探地雷达法和地震映像法在管道、空洞探测等方面均有效果,但探地雷达分辨率更高,异常特征反应更加明显;探地雷达法在城市地区探测时容易受环境干扰,而地震映像法抗干扰能力强,勘探深度大;探地雷达法和地震映像法应配合使用,选取最佳施工参数,彼此验证,提高解释精度.实践表明,该法在城市路面塌陷勘探是有效可行的,可为城市路面塌陷路基治理提供强有力的依据.
展开▼
