利用浅层地震勘探对广东龙川东江老隆大桥桥址进行勘查 ,得到测区基岩面的起伏形态、速度分布以及断层位置。结果表明 ,测区为一条近南北向的断裂沉降带 ,桥址的中心线正好通过其中。从经济与安全的角度出发 ,建议老隆大桥最好能另选桥址 Using shallow seismic exploration to survey the bridge site of Dongjiang Laolong Bridge in Longchuan of Guangdong, the undulating pattern, velocity distribution and fault location of bedrock surface in the survey area are obtained. The results show that the survey area is a nearly NS-trending fault subsidence zone with the centerline of the bridge just passing through it. From the perspective of economy and safety, it is suggested that Laolong Bridge can best choose another bridge site