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ANALISIS DATA SEISMIK GELOMBANG PERMUKAAN PADA LAPISAN ASPAL DENGAN MENGGUNAKAN METODE SASW (SPECTRAL ANALYSIS OF SURFACE WAVE)
Abstract
Metode Spectral Analysis of Surface Wave (SASW) merupakan salah satu pengujian di lapangan yang tidak merusak, cepat, akurat dan ekonomis yang sedang dikembangkan penggunaannya dalam memperkirakan dan menilai kekuatan suatu struktur. Metode ini dibangun berdasarkan sifat perambatan gelombang rayleigh pada media yang berlapis. Penelitian ini bertujuan untuk menentukan nilai kecepatan gelombang geser dan modulus elastisitas perkerasan jalan menggunakan metode SASW pada jalan lama, baru dan jalan yang telah dioverlay.
Metode SASW mengandung tiga bagian utama yaitu pengambilan data lapangan, analisis data spektrum untuk pembuatan kurva dispersi kecepatan gelombang Rayleigh terhadap panjang gelombang dan proses inversi untuk membentuk kurva kecepatan gelombang geser terhadap kedalamannya.
Dari hasil analisis pada profil kecepatan gelombang geser dan modulus elastisitas terhadap kedalamannya pada perkerasan jalan baru, jalan lama dan jalan yang telah dioverlay diperoleh nilai kecepatan gelombang geser masing masing 685,5146 m/dt, 777,1562 m/dt dan 832,0904 m/dt. Sedangkan nilai modulus elastisitas masing masing 2678,177 Mpa, 5123,997 Mpa dan 3765,418 Mpa.Keywords
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DOI: https://doi.org/10.46964/inersia.v8i2.655
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