| In our country, geological condition is complex and changeful, the soft soil is widelydistributed, which always brings great impact and large hidden trouble for quality and safetyto highway construction. The design of road should avoid soft soil areas as far as possible, butthe route always be inevitably must through some soft soil areas, so the treatments of soft soilbase is a common project on road and bridge construction field. So the treatment of soft soilbase is a problem and a difficulty. the treatment schemes of soft base becomes more necessary,which not only can bring economic benefits, it is more important to help the national road tocreate a higher level of service, to create the convenience and comfort to the people, and tobring new breakthrough to the soft base treatment field. My paper aims to research on theprinciple, process and key points of the treatment schemes, and combining with the treatmentschemes of soft soil in Guangming Expressway Guangzhou section project, analyses andsummarize the test reports, summed up a variety of effect, applicability, advantages anddisadvantages of these treatment schemes of the soft soil base. Upon examination, the areas ofpacked drain well get a better control of subgrade settlement, the roadbed stability isstrengthened, the piles of the plain concrete pile area are very good; classâ… pile whichaccounted for85.7%of the number of testing evaluation piles, classâ…¡pile occupied14.3%,did not appear class â…¢, class â…£ pile, and the load characteristic value reached110kPa; theload characteristic value of high pressure spraying pile areas reached120kPa; aftercomparison, selection and test detection analysis of a variety of soft soil base treatmentschemes. The technologies of packed drain well, plain concrete pile and high pressurespraying pile all are simple, reasonable, reliable, effective and no pollution. Three methodsare effective, reasonable and economical, but these three treatment methods have their owncharacteristics. |
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