Geotechnical Engineering Geological Division And Parameter Optimization Analysis In Zhengzhou City

The lack of urban land resources is a problem faced by many cities.The rational use of limited land resources and the increase in the use of urban underground space are the key to urban development.The paper takes Zhengzhou City as an example to carry out geotechnical engineering geological zoning work in order to effectively guide local city planning and construction,deep foundation pit support design,foundation and foundation design and other aspects of work.In foundation pit engineering design,how to determine the value of rock and soil strength is a key issue.Selecting the correctness of the strength index directly determines the engineering construction safety and economy.The paper collated and analyzed the previous research results and some geotechnical survey data in Zhengzhou City.First,geotechnical engineering geological zoning was conducted in the urban area of Zhengzhou City;secondly,one of the engineering geology sub-regions(CBD Area)was selected as the key research object.Regression analysis and probability distribution theory,with the help of data statistical analysis software(spss,MATLAB,etc.),studied the selection of strength parameters of deep foundation pit rock and soil,and the main research results obtained were as follows:The Research content of this paper is as follows:1.Based on the differences in topography and geomorphology,rock formation genesis,structural characteristics,and physical and mechanical properties of the study area,geotechnical engineering geological zoning was conducted in the urban area of Zhengzhou City,and a regional evaluation was conducted.2.The statistical regression relationship between rock and soil parameters in the CBD region was studied using spss statistical analysis software,and statistical regression equations were obtained.At the same time,the coefficient of variation of rock and soil parameters in the region was statistically analyzed.The above two aspects have certain guiding significance for the selection of strength parameters in the region.3.Probabilistic theory was used to statistically analyze the geotechnical parameters of four soils in the CBD area of Zhengzhou New District,and the probability density function of each soil strength parameter was calculated.Based on this function,the Bayesian theory was used to optimize the concrete project.The research results of the thesis have certain guiding significance for the selection of strength parameters in foundation pit support and foundation design.