Assessment of urban engineering construction-based geological environment carrying capacity in the urban area of Putian City, Fujian Province

To study the relation between human engineering construction activities and geological environment carrying capacity in the urban area of Putian City, Fujian Province, nine assessment factors are selected, including the soft soil burial depth, thickness, sand liquefaction, burial depth of pebble and sand-cobble layer, bedrock burial depth, fresh-saline groundwater interface, groundwater corrosivity, earthquakes(site classification)and inferred fault, taking 500 m×500 m grid as the assessment unit, to assess the geological environment carrying capacity of the study area with the GIS software and fuzzy mathematics evaluation method. The results show that the areas with medium-high carrying capacity account for 90.18% of the total area, while the areas with low carrying capacity occupy 9.82%, mainly located near the mouth of Mulan river, not suitable for planning and layout of large buildings. It is suggested that the completed major projects be monitored in real time and engineering dynamics be grasped to avoid loss caused by geological environment.