Analisa Lapisan Keras (Bedrock) dengan Menggunakan Metode Seismik Refraksi
Abstract: Each region
generally has a condition of various land surface, usuallyused as information
for making a geological map of the regions, but theinformation can not provide
a real illustration of the depth of the hard layer (bedrock) found in the area.
Thus, to determine the depth of the bedrock as the initial information
exploited for the region of Banjarbaru more, then done by measuring the depth
of the bedrock by seismic refraction. Soil has several compiler layers, the
deeper layer from surface is denser and each layer has defferent
characteristics. The nature used in this research is the difference of the speed
to creep the seismic waves on each layer. By creeping the seismic waves, the
information of undercoat surface is obtained depend on the speed in creeping
seismic waves. To find out the speed and types of layers under the soil and to
know the depth of the bedrock in the region are done by using seismicequipment
refraction, by initial assumption that bedrock usually is found in the relatively
shallow depth in the region of Banjarbaru. From the results of the data sampling
done by measuring the length of the track 72 meters and then processed by using
the software winsism 10 bedrock was found on the yard of engeniring faculty
Unlam Banjarbaru in depth around 6-15 meters, in the speed of spreading waves
in the range of 2800-3200 (m/s) and there is nappe layer (top soil) of the seismic
waves creeping velocity 300-400 (m/s) and a much watercontent-thinner layer
spreading speed of seismic wave in the range of 1400-1600 (m/s).
Penulis: Binar Utami,
Fahruddin dan Simon S Siregar
Kode Jurnal: jpfisikadd090067
