| With the rapid growth of the social economy,the urbanization construction process has been accelerating,the urban geological resources have been rapidly consumed,and urban geological problems have emerged in large numbers,resulting in the balance between urban geological environment systems and human engineering construction activities being broken.In order to maintain the sustainability of urban development,the evaluation of the geological environment suitability of urban engineering construction was proposed and occupied a certain position in urban geological work.This research relies on Yunnan Geology and Mineral Engineering Investigation Group Co.,Ltd.to carry out the special project of “Integration of Geological Environment Suitability Evaluation System for Urban Engineering Construction of Yunnan Urban Geological Three-dimensional Data Information Platform Construction Method”,which is accessed through massive literature and monographs.Comprehensive analysis of principles,methods,ideas,and selection,quantification,calculation and evaluation of urban geological work and urban construction engineering geological environment suitability evaluation,for 7 evaluation methods,5 evaluation numerical models and 2 weight calculations The method is compared and analyzed,and the corresponding advantages,disadvantages and practicability are given.The topographical and geomorphological conditions,hydrogeological conditions,engineering geological conditions,adverse geological processes and geological disasters,active faults and seismic effects,and human engineering activities are considered.A total of 41 geological environment indicators were selected as the participating factors,and a comprehensive set of comprehensive geological environment suitability evaluation system for urban construction in the urban area of Yunnan Province and similar mountain basins was integrated;and the city of Qujing City Urban Planning Area was adopted.Construction Validation studies qualitative evaluation environmental suitability partition.By collecting a large amount of geological environment data and appropriate field supplementary investigations,the basic geological environment characteristics,geotechnical characteristics,hydrogeological conditions and adverse geological effects of the study area are analyzed and evaluated.It is mainly based on the 3D visualization model of engineering geology to systematically study the distribution and characteristics of soft cohesive soil,soft soil and expansive soil,and the distribution and spatial distribution characteristics,spatial distribution and physical and mechanical characteristics of saturated silt soil.At the same time,with reference to factor selection conditions,19 index factors such as groundwater level burial depth,aquifer thickness,water-richness,rock and soil type,bearing capacity and plasticity were selected.Based on MIDAS numerical simulation,the rationality of index factor selection was verified.The ArcGIS related module combines the comprehensive index method and GIS spatial analysis to evaluate the suitability of high-rise buildings,low-rise buildings and comprehensive development projects in the study area,systematically discusses the evaluation of the regional results,and proposes the coordination of project construction and construction planning.result.To verify the rationality of the geological environment suitability evaluation system for urban engineering construction,and to provide scientific and reliable geoscience reference materials for the project construction planning of the study area.Through the above research,the main understanding is as follows:(1)The geology of foreign cities began earlier,and the current stage is relatively mature,while the domestic urban geology is still in the development stage.The method for urban geological work in Yunnan Province is still in the exploration stage,and a relatively complete and unified evaluation index system is not formed.The choice is not clear,nor has it formed a unified technical regulation and norm as a guide.The urban construction planning scheme and the evaluation of the geological environment suitability of urban engineering construction have not yet been closely integrated.(2)The urban planning area of Qilin Central City of Qujing City is flat and flat,and is not affected by the fault zone.The seismic activity is weak.The distribution of soft cohesive soil,soft soil and expansive soil in the study area and the influence of saturated silt sand on urban engineering construction Larger.Based on MIDAS numerical simulation,the influence degree of special foundation soil layer on the construction of the study area is determined as follows: expansive soil>organic soil>soft clay soil>peat soil.(3)Through the regional evaluation of the geological environment suitability of the urban construction construction of the Qilin Center urban planning area in Qujing City,the results show that the study area is suitable for comprehensive development and low-rise buildings,and some areas are suitable for high-rise buildings;engineering construction suitability and construction planning coordination Overall good,suitable for urban planning and construction.(4)Through the verification study of the urban planning area of Qilin Center in Qujing City,the results of the district evaluation are more realistic,and the research integration is applicable to the evaluation system of geological environment suitability of urban construction in the urban area of Yunnan Province and similar mountain basins.Scientific and reasonable. |
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