Research On Early Warning Of Soil Engineering Geological Problems Oriented To Engineering Geological Section

Engineering geological problems refer to the geological problems that the existing engineering geological conditions change in the process of engineering construction and pose a threat to the safety of Engineering buildings.It affects the technical requirements and safety reliability of building construction.Engineering geological section map is a common manifestation of geological structure.It reveals the vertical geological structure in a certain depth range according to a certain proportion.There are a lot of engineering geological information in the engineering geological sections.The engineering geological sections database contains not only the attribute information of engineering geological sections objects,but also a large number of in-situ test and geotechnical test data.It is of great significance to study early warning methods for engineering geological problems In order to achieve the purpose of rational development of urban underground space,to prevent possible engineering geological problems,To prevent further expansion of the scope of engineering geological problems.So this article puts forward the engineering geological sections oriented soil engineering geological problems early warning solutions.The theoretical basis,research contents and conclusions are as follows:(1)This paper researches into the basic elements and constraints of engineering geological section based on early warning of soil engineering geological problems,based on engineering geology Theory,the paper abstracts the conceptual model of engineering geological sections supporting the discrimination of soil engineering geological problems.On the basis of conceptual model,the entity categories of engineering geological objects are studied,and these entities are abstracted into logical models.Combined with the data organization of ArcGIS GeoDatabase,the paper finally constructed the physical model of engineering geological sections.(2)Based on spatial data model and geomechanics theory,studing the expert knowledge and rules of soil engineering geology problems discrimination based on section.Qualitative and quantitative description of soil engineering geological problems and storage of knowledge and rules.Realize the association between spatial database and knowledge.(3)Studying the automatic identification method of soil engineering geological problems based on GIS spatial analysis technology.Based on the data model of engineering geological sections,combined with the expert knowledge and rules of soil engineering geological problems identification,and using the methods of spatial query,numerical comparison and logical judgment.Propose the discrimination algorithm of soil engineering geological problems based on GIS spatial analysis technology such as compression of soft soil,liquefaction of sandy soil and ground fissures.Identifying potential soil engineering geological problems on target engineering geological section automatically,and then extract and save the recognition results.(4)Study on visualization of soil engineering geological problems method.On the basis of the distinguishing results of engineering geological problems,through different combinations of color and point,line and graphics,according to the classification and grading characteristics of section data,select the corresponding visual variables,using color model and symbolic rendering method,rendering and emphasizing objects need to be highlighted.Realized the visualization warning of soil engineering geological problems.