Mekanika Tanah 2 Konsolidasi 1/26/ :10 PM

Presentasi berjudul: "Mekanika Tanah 2 Konsolidasi 1/26/ :10 PM"— Transcript presentasi:

1 Mekanika Tanah 2 Konsolidasi 1/26/2018 12:10 PM
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2 Koefisien Konsolidasi (Cv)
1/26/ :10 PM Koefisien Konsolidasi (Cv) Metode Kecocokan Log-Waktu Prosedur ini diusulkan oleh Casagrande dan Fadum (1940) Bisa digunakan apabila konsolidasi sekunder teramati Bagian kurva konsolidasi primer dan sekunder cukup jelas © 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

3 Metode Kecocokan Log-Waktu

4 Metode Kecocokan Log-Waktu

5 Metode Kecocokan Log-Waktu

6 Metode Kecocokan Log-Waktu
1/26/ :10 PM Metode Kecocokan Log-Waktu Metode Kecocokan Log-Waktu Setelah R0 dan R100 dapat ditentukan, hitung R50 R50=(R0+R100)/2 Tentukan t50. Garis horizontal dari R50 berpotongan pada kurva di t50 (waktu untuk mencapai derajat konsolidasi 50%) Nilai Tv untuk derajat konsolidasi rata-rata U = 50% adalah 0,197, sehingga koefisien konsolidasi Cv dinyatakan dalam persamaan: Untuk U<60%: Tv = (π/4)U2 Untuk U>60%: Tv = log (1-U) – 0.085 © 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

7 Metode Akar Waktu Metode Akar Waktu
1/26/ :10 PM Metode Akar Waktu Metode Akar Waktu Metode ini diusulkan Taylor (1948) untuk menentukan Cv Grafik yang digunakan adalah hubungan antara penurunan dan akar waktu Pembacaan penurunan memerlukan waktu yang lebih pendek dibandingkan metode log-waktu Kedudukan garis lurus tidak selalu diperoleh dari penggambaran metode akar waktu  Perlu dicoba Metode Log-Waktu © 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

8 Metode Akar Waktu Plot grafik hubungan antara penurunan dan akar waktu
Perpanjang garis dari bagian awal kurva yang lurus hingga memotong ordinnat di titik P dan absis di titik Q Gambar garis PR dengan OR = 1,15xOQ Perpotongan dari PR dengan kurva merupakan titik R90 pada absis  t90 dapat diperoleh Faktor waktu Tv untuk U=90% adalah 0,848. Sehingga:

9 1/26/ :10 PM Konsolidasi Sekunder Konsolidasi sekunder terjadi setelah konsolidasi primer Perlu pengamatan yang lebih lama pada uji laboratorium Indeks pemampatan sekunder Cα dan penurunan konsolidasi sekunder dinyatakan dengan: © 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

10 Drainase Vertikal Kecepatan konsolidasi suatu lapisan tanah dapat ditingkatkan dengan menggunakan drainse vertikal Drainase vertikal dapat berupa kolom- kolom pasir, pita geosintetik atau bahan-bahan lain yang ditanam memanjang secara vertikal di dalam tanah

11 Drainase Vertikal www.tencate.com www.joostdevree.nl
geosistemindonesia.indonetwork.co.id

12 Drainase Vertikal

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