Study On Comprehensive Evaluation Of Soft Soil Foundation Treatment In Seasonal Frozen Area Of Heilongjiang Province

The soft soil gene has many characteristics such as high water content,large void ratio,small bearing capacity of the foundation and so on,which causes many difficulties for highway construction,so it needs to be dealt with.Different treatment options will produce different results.How to choose a technically feasible and economically reasonable plan becomes the focus of our attention.In addition,as the country's emphasis on the environment continues to increase,so should its social benefits.Therefore,this article will combine with the Harbin Songhua River summer battle preparedness road project to establish a comprehensive evaluation index system for comprehensive evaluation of different treatment programs from multiple angles.In order to better establish the evaluation index system,we should first study the basic properties of soft soil foundation,obtain the physical and mechanical indexes of soft soil through laboratory tests,analyze the law of change,and have an overall understanding and understanding of the properties of soft soil.On this basis,a comprehensive evaluation index system is established.The evaluation method is AHP+GRAP combined evaluation.Compared with the traditional single method,the combined evaluation method can exert the advantages of the two well and combine objective factors with subjective factors.Its own inadequacies.This article will use the analytic hierarchy process to decompose the rating target,establish the evaluation model,construct the judgment matrix,and calculate the index weight.The indicators are developed from technical benefits,economic benefits and social benefits,and analyze many factors that affect the treatment effects of soft ground.Using ABAQUS finite element numerical analysis software,using the calculation parameters obtained from the experiment,a simulation was performed to simulate the treatment effects of three treatment options:bagged sand well,plastic drainage plate and geogrid,and the index data was obtained.At the same time,it also obtains other corresponding indicator data by consulting related data.With the aid of grey correlation analysis,the indicators are processed to quantify qualitative indicators.Finally,through the use of MATLAB mathematics software,a series of calculations,and ultimately select the optimal program for the rational selection of soft soil foundation treatment plan for highway construction in Heilongjiang Province,frozen quarters provide scientific basis.