Perilaku Siklus Drying Wetting terhadap Kuat Geser Tanah Untuk Menentukan Kestabilan Lereng pada Ruas Jalan Padang – Bukittinggi (Lembah Anai) (Wetting Drying Cycles Behavior to Strong Land Slide To Determine the Slope Stability Roads Padang – Bukittinggi (Anai valley)

Archenita, Dwina and Nengsih, Silvia and -, Liliwarti and Mirani, Zulfira (2013) Perilaku Siklus Drying Wetting terhadap Kuat Geser Tanah Untuk Menentukan Kestabilan Lereng pada Ruas Jalan Padang – Bukittinggi (Lembah Anai) (Wetting Drying Cycles Behavior to Strong Land Slide To Determine the Slope Stability Roads Padang – Bukittinggi (Anai valley). POLI REKAYASA, 8 (2). 08-19. ISSN 1858-3709

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Abstract

The ground movement particularly erosion, can be happened in various scale and speed. This disaster often happened almost simultaneously with flood caused by heavy rain. According to the geological map of Sumatera Barat, type of soil in Sumbar contains tuffs, silica, and the bolder the bond is relatively low cohesion, so easy to loose if exposed to water. This condition is further aggravated by the location of the province which is located in Bukit Barisan which is largely a steep hill. At the time of very heavy rain, the water will easily seep into the soil layer below it, consequently the adhesive layer of the soil before the first and second solid will fill with water and slippery, so landslide. Therefore be tested to review the soil shear strength parameters due to the influence of changes in the summer – rain (drying-wetting cycle) so handling of the collapse of the slope can be addressed with accurate/more appropriate. The result of sieve analysis be obtained percentage of pass filter No.200 = 9.145 % and pass filter No.10 = 56.35 %, cu = 28.750 dan Cc = 1.359. So the soil investigation according USCS classification including sand with well graded (SW). The result of shear strength (direct shear) shows that with the addition of water to be impaired cohesion of soil. The fall in the value of cohesion is not so significant because the soil containing by sand and less silt/clay. The addition of water will effect on value of the shear angle. From the research conducted shows that addition of the water content increase in the shear angle value of soil. In addition, by increasing the water content of a decline in the value of safety factor of a slope and also a decrease in the value of soil cohesion. This means that the safety factor and the cohesion of soils is directly proporsional. The soil water content with Anai Valley location at the point under test seen that at 7% moisture content increase the safety factor, means on the soil water content in solid condition so the shear strength is maximum. As with increasing water content values above 7% safety factor tends to decrease to 20% moisture content, while the water content above 20% safety factor on the decline.

Item Type:Article
Subjects:G Technology > GE Railroad engineering and operation
Divisions:Jurusan Teknik Sipil > Prog.Studi Teknik Sipil-D3 > Jurnal/Karya Ilmiah
ID Code:263
Deposited By:Mr. OP Repo-1 Puskom
Deposited On:13 Oct 2016 12:40
Last Modified:09 Nov 2016 14:07

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