CORELATION OF CBR LABORATORY TEST ANDudDYNAMIC CONE PENETROMETER TESTud(Selokan Mataram Road Maguwoharjo – Babarsari)

摘要

The use of Dynamic Cone Penetrometer resulted in an estimated ratio ofudsoil strength. Dynamic cone penetrometer can also be used as an indicator ofudchanges in soil moisture in situ testing in accordance through the soil profile.udResearch in this study is laboratory test at the Department of Civil Engineering,udFaculty of Engineering, University of Atma Jaya Yogyakarta and DCP test fieldud(along the Selokan Mataram Road Maguwo - Babarsari to obtain a minimum ofud15 samples). The purpose of this research is to find the correlation value of CBRud(California Bearing Ratio) and DCP (Dynamic Cone Penetrometer). The researchuddivided into two tests, first for the DCP test in order to find the DCP value (mm /udblow). The second test is CBR laboratory test to find the CBR value. CBR andudDCP values are plotted on a graph and then look for the value of its correlationudwith a linear regression methods. After correlation CBR - DCP resulting equationudLog CBR = 1.175494 - 0.011362 Log (DCP), the CBR value (%) of each DCPudtest locations can be searched by this equation. CBR and DCP correlation valuesudin this study at location 1 close to the correlation of previous studies by NCDOTud(1998) with the equation log (CBR) = 2.60 – 1.07 log (DCP), and at location 2 toud10 close to the correlation of previous studies by Livneh et . al. (1992) with theudequation log (CBR) = 2.45 – 1.12 log (DCP). From the correlation obtained,udlaboratory CBR value can be correlated with value of DCP in the field. From thisudcorrelation obtained the DCP test value every location at the field closed to theudCBR laboratory value with the real condition.