Research On Urban Geological Survey Of Cuiheng New District Of Zhongshan City Based On Remote Sensing

Geological disaster is one of the most serious environmental problems in the world.According to the overall planning of Zhongshan City and the needs of major engineering construction,with advanced multi-source and multi-temporal optical satellite remote sensing data as the main data source,comprehensive geological survey on urban geological resources,environment,space and disaster is carried out to provide effective services for environmental protection of urban planning layout,disaster reduction and Prevention of Zhongshan City.In this paper,Cuiheng new area,a key investigation area of Zhongshan City,is taken as the research area,and the relevant geological data are collected,and the high-resolution remote sensing image data are used to achieve the following results and innovations through theoretical research and experimental methods.Geological hazard is one of the most serious environmental problems in the world.Urban geological survey provides basic data for the solution of urban environmental geological hazard.According to the overall planning and major engineering construction needs of Zhongshan City,using advanced multi-source and multi-temporal optical satellite remote sensing data as the main data source,carrying out comprehensive geological survey for urban geological resources,environment,space and disaster,can provide effective services for environmental protection of urban planning layout,disaster reduction and prevention of Zhongshan city.This paper takes Cuiheng new area,the key survey area of urban geology in Zhongshan City in 2019 as the research objective,collects relevant geological data,interprets and carries out systematic field investigation and field verification by using high-resolution remote sensing image data.There are 1053 observation points,163 samples of various types are collected,the survey area of the field route is 232km2,and the total length of the route is 530.41 km.Through field verification,the interpretation results are accurate Reliable.Through theoretical research and field investigation,the following achievements and understandings have been achieved.1)According to the high-resolution remote sensing image,the remote sensing interpretation of landform and structure in Cuiheng new area has been completed,and the scale of fault structure in the area has been further divided into class I fault and class II fault.In this remote sensing interpretation,there are 4 regional class I faults,more than 10 class II faults and 3 ring structures.The interpretation results show that the faults in Cuiheng new area of Zhongshan City are mainly NW,NE and interlaced with each other,in which Baini Shawan fault and Shaxi Zhongshan port fault are the newly interpreted grade I regional faults.2)Landslides and collapses are the key problems in this remote sensing urban geological survey.Based on the analysis and study of the remote sensing image characteristics of landslides and collapses,and through field verification,a systematic interpretation mark of landslides and collapses in Cuiheng new area is established,and the location,size and hazard level of landslides and collapses are clearly classified.The distribution of the bad geological bodies and the mechanism of the engineering geological problems are found out.3)According to the results of remote sensing interpretation,according to the national standard classification standard of engineering rock mass,the engineering construction suitability of Cuiheng new area is divided into three categories: hard rock,soft rock and loose rock.Based on the study of various geotechnical characteristics and suitability bearing capacity,combined with the drilling data in the area,according to the thickness of soft soil and the size of surface settlement value,the suitability zoning of the project construction in Cuiheng new area is carried out,and reasonable and effective suggestions are put forward.4)Through remote sensing interpretation and surface survey,the geological disasters such as coastal change,soft soil settlement,slope and debris flow in the region are identified.Through drilling,the spatial distribution range of all kinds of rock and soil mass in Cuiheng new area is generally identified.All kinds of rock and soil mass are zoned and zoned in plane and layered in vertical.