Bids Are Invited For Contracting Of Specialized Services In Cbr (California Bearing Ratio), Poll (Hole) And Spt (Standard Penetration Test) Test In The Municipality Of Fernandes Pinheiro.

Percussion Survey With Standard Penetration Test (Spt), Standard Penetration Test, A Geotechnical In -Sideline Method That Can Characterize The Underground And Obtain Essential Parameters For The Dimension Of Foundations, Paving Works, Drainage And Other Structures. This Type Of Probing Permanently, Identifying The Different Deholo Types Along The Depth, Determining The Water Table, Obtain The Penetration Deresistence Index (Nspt), Used Soil Loading Capacity, Collect Deformed Samples For Advice And Tactile-Visual Classification. The Execution Of Probing Occurs Through Piercing And Water Circulation (Washing), To The Depth Defined In The Project (Usually Between 3 M And 20 M, Depending On Characteristics Of The Work). With Each Subway, Or Whenever There Is A Change In Soil, The Spt Test Is Performed, Which Consists Of The Crimping Of A Sampler. The Fall Of A 65 Kg Hammer At A Height Of 75 Cm. The Number Of Degolpes Needed To Stuff The Last 30Cm Of The Sampler Corresponds To The Value Of The Value, A Fundamental Parameter To Assess Soil Resistance, Being Used To The Genetic Sizing Of Civil Works., Cbr (California Bearing Ratio), One Of The Main Laboratory Methods For Supporting The Support Capacity Of The Soils Used In Sublice And Bases. The Test Has As Its Purpose To Determine The Soil Resistance To Penetration, Simulating The Loading Conditions On Pavement Layers, It Will Evaluate Compacted Soil Quality And Its Application For Application To Road Works, To Serve As The Basis For The Sizing Of Flexible And Rigid Pavements, According To Current Technical Standards. The Test Is Carried Out In The Laboratory, Using Soil Samples Collected In The Field. Once The Standardized Soil May Be Appreciated And Compaction, A Load Is Applied With A Specific Diameter Piston Over A Sample, Measuring Penetration And Force. The Result Is Expressed As Index Cbr (%), Which Represents The Resistance Soil In Relation To A Standard Material (Crushed Gravel). This Index Is Fundamental For The Definition Of The Pavement Structure, Directly Influencing The Choice Of Materials, The Thickness Of The Layers And The Swimming Of The Work. The Test Will Be Executed According To The Guidelines Of The Abnt Nbr 9895 - Soil - California Support Index (Cbr), And The Results Will Be Presented In Technical Report Signed By Professional, Containing Recommendations For Use In Engineering Projects.