| According to the requirements of various land use, suitability assessment is to analyze the suitability of regional land development and determine the factors for controlling regional development and seek the best land use patterns and reasonably determine the appropriate development of land. Construction suitability evaluation is an important reference for urban planning and construction. At present, there is still not a complete unified architecture suitability evaluation system.Due to the status of lacking resonable method for construction suitability evaluation, in the study taking MinQuan planning resettlement areas in the east of Sichuan province as the research object, the main factors such as basic geological environmental conditions, terrain slope, geological structure, strata lithology and site stability, are selected to be the main factors to affect the construction suitability, then the suitability of resettlement areas is evaluated qualitatively and quantitatively and results are obtained as the following:(1) Based on the topography, strati graphic and lithologiy, geological structure, hydrogeology, rock weathering, adverse geological phenomena, the thesis mainly analyses the infulences of topographic slope, stratigraphic and lithologic, geological structure and site stability on construction suitability, and evaluates the engineering geological environment and site stability of the studying region.(2) Topographic slope, stratigraphic and lithologic, geological structure and site stability are chosed as evaluation factors, the weightings are determined by AHP method and expertise method, then an evaluation index system is established for construction suitability assessment.(3) A model of construction suitability assessment is set up using comprehensive index method and GIS technology. Under the plateform of ArcGIS, finally, a planning program of suitability is gained, namely, the study area is divided into11zones and4grades of suitability.(4) The construction suitability of studying region evaluated quantitatively by the sum of comprehensive index method and GIS technology, and a rational evaluation program is put forward which not only makes up the qualitative subjectivity but also avoids the inaccuracy of single quantitative evaluation. This research makes the result more scientific and accurate. |
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