海南火山熔岩区不良地质分布区划研究

根据海南区域地质构造及火山系统的分布特点,熔岩流及其形成的不良地质空间分布对公路工程的影响程度,结合GIS地理信息系统,在1∶50万的地理底图基础上,建立了海南火山熔岩不良地质分布的公路单项自然区划。研究结果表明:火山作用地质特征及熔岩流向与区域断裂带和火山系统分布空间位置有关,熔岩流向在空间分布及熔岩隧洞等不良地质体的发育具有一定的规律性,但在较小范围的特定区内,其出现有着随机性。以各主要火山系统或火山群为中心,其半径为0~10 km划分为Ⅰ类影响区,半径为10~20 km划分为Ⅱ类影响区,琼北其它熔岩地区划分为Ⅲ类区,全岛剩余地区划分为Ⅳ类区。

Study on Bad Geology Distribution Division of Volcanic Lava Area in Hainan

According to the distribution characteristics of regional geological structure and volcanic system in Hainan, impact of lava flow and space distribution of bad geology formed by it on highway engineering, combined with GIS geographic information system, on the basis of 1:500000 geographic map, the Hainan lava adverse geological distribution area is space distribution. The study result has shown that volcanism geological characteristics and lava flow direction is related to regional distribution of faults and volcanic system spatial location. The adverse geological development such as the lava flow direction in the spatial distribution and lava tunnels, etc has certain regularity, but in a smaller range of specific areas, it is random. Centered on the major volcanic systems or volcanoes, its 0~10 km radius affected zone can be divided into zone Ⅰ, and its 10~20 km radius affected zone is divided into zone Ⅱ, other volcanic lava of North Hainan is divided into zone Ⅲ, the rest of the island is divided into zone Ⅳ.