The Influences of Normal Load Variation in Direct Shear Strength Test Parameters Tuff from Candi Ijo Yogyakarta

  • Authors

    • Singgih Saptono
    • Rahmatyo Gilang Trilaksono
    • Waluyo Adi Siswanto
    2019-01-24
    https://doi.org/10.14419/ijet.v8i1.1.24658
  • Internal friction angle, Direct shear strength test, Mohr & coulomb criterion, Hoek-Brown criterion
  • This paper presents direct shear strength test results of tuff taken from Candi Ijo of Jogjakarta, Indonesia where the slopes are considered in critical condition and need attention. Serial shear tests were conducted to find the normal loads appropriate for direct shear strength test. The optimum set of normal loads on direct shear strength test for tuff  from Candi Ijo were tried by analyzing Mohr & Coulomb criterion against Hoek-Brown criterion. The study shows that excessive normal load may initiate crack caused by a failure on direct shear strength test due to the generated shear stress as well as the normal stress. This can be indicated by the unacceptable high value of cohesion (c) and the low internal friction angle (Ï•). The maximum limit of normal stress (σn) on direct shear strength test 12.5% σc  for Indonesia general area is still applicable for the case of Candi Ijo. This research work recommends applying normal loads for direct shear strength test of tuff are 0.4 kN, 0.6 kN and 0.8 kN. This recommendation was also supported by the analysis using graph suitability of Mohr & Coulomb criterion and Hoek-Brown criterion.

     

     

  • References

    1. [1] Ladanyi, B., Archambault, G., 1969, Simulation of Shear Behaviour of a Jointed Rock Mass, ARMA-69-0105, The 11th U.S. Symposium on Rock Mechanics (USRMS), 16-19 June, Berkeley, California.

      [2] Grasselli, G., 2001, Shear Strength of Rock Joints Based on Quantified Surface Description, Ph.D. Thesis, Civil Engineering Department, EPF Lausanne, Switzerland.

      [3] Saptono, S., 2009, Pengaruh Ukuran Conto Terhadap Kekuatan Batuan [Influence of sample size to the strength of rock], Jurnal Teknologi Mineral, 16(1), pp. 1-6.

      [4] Brace, Paulding, Scholz, 1966, Dilatancy in The Fracture of Crystalline Rocks, Journal of Geophysical Research, 71(16), pp. 3939-3953.

      [5] Cavailhes, T, Rotevatn, A., 2018, Deformation bands in volcaniclastic rocks – Insights from the Shihtiping tuffs, Coastal Range of Taiwan, Journal of Structural Geology, Vol. 113, pp. 155-175.

      [6] Marmoni, G. M., Martino, S., Heap, M. J., Reuschlé, T., 2017, Gravitational slope-deformation of a resurgent caldera: New insights from the mechanical behaviour of Mt. Nuovo tuffs (Ischia Island, Italy), Journal of Volcanology and Geothermal Research, Vol. 345, pp. 1-20.

      [7] Togashi, Y., Kikumoto, M., Tani, K., Hosoda, K., Ogawa,K., 2018, Detection of deformation anisotropy of tuff by a single triaxial test on a single specimen, International Journal of Rock Mechanics and Mining Sciences, Vol. 108, pp. 23-36.

      [8] Wang, J., Jung, W., Li, Y., Ghassemi, A., 2016, Geomechanical characterization of Newberry Tuff, Geothermics, Vol. 63, pp. 74-96.

      [9] Yavuz, A.B, Akal, C., Türk, N., Çolak, M., Tanyu, B.F., 2015, Investigation of discrepancy between tuff used as building stones in historical and modern buildings in western Turkey, Construction and Building Materials, Vol. 93, pp. 439-448.

      [10] Chen, Y-F., Ling, X-M, Liu, M-M., Hu, R., Yang, Z., 2018, Statistical distribution of hydraulic conductivity of rocks in deep-incised valleys, Southwest China, Journal of Hydrology, Vol. 566, November 2018, pp. 216-226.

      [11] Brace, Paulding, Scholz, 1966, Dilatancy in The Fracture of Crystalline Rocks, Journal of Geophysical Research, Vol. 71(16), pp. 3939-3953.

      [12] Made Astawa Rai, Suseno Kramadibrata, 2012, Mekanika Batuan [Rock Mechanics], Laboratorium Geomekanika dan Peralatan Tambang Institut Teknologi Bandung, Bandung.

      [13] Saptono, S., 2012, Pengembangan Metoda Analisis Stabilitas Lereng Berdasarkan Karakterisasi Batuan di Tambang Terbuka Batu bara [Development of slope stability analysis based on rock characteristics in coal open mining], Doctorate Dissertation, Fakultas Tambang, Institut Teknologi Bandung.

  • Downloads

  • How to Cite

    Saptono, S., Gilang Trilaksono, R., & Adi Siswanto, W. (2019). The Influences of Normal Load Variation in Direct Shear Strength Test Parameters Tuff from Candi Ijo Yogyakarta. International Journal of Engineering & Technology, 8(1.1), 184-189. https://doi.org/10.14419/ijet.v8i1.1.24658