Komparasi Nilai Daya Dukung Tanah Lempung Ditinjau dari Hasil Uji Skala Penetrasi Konus Dinamis, Uji CBR Laboratorium dan Uji Kuat Tekan Bebas

Abstract

Soil bearing capacity can be determined with several kind of test, that could produce different test
result for same sample in accordance to characteristics of test equipment and main targets of each
test equipment in determining soil parameters. This research aimed to compare characteristics of
soil bearing capacity that obtained from DCP (Dynamic Cone Penetrometer) test, Laboratory
CBR test, and UCS (Unconfined Compressive Strength) test.
The soil sample which tested on this research was from Margakaya village and Palputih village,
District of Jati Agung, South Lampung and Blimbing Sari village, District of Jabung, East
Lampung. Soil sample for Laboratory CBR test was made by compaction. Meanwhile, soil
samples for UCS test was undisturbed soil and remoulded sample.
The result of research showed that the CBR value of DCP test result was greater than the
Laboratory CBR test result with margin less than 1%. The CBR value was directly proportional to
the compressive strength of its soil. Meanwhile, the DCPI value of DCP test result was inversely
proportional to the design CBR value and the compressive strength of its soil.
Keywords: California Bearing Ratio, DCPI, clay, compressive strength