ORIGINAL PAPER Assessment of Relationship Between Grouted Values and Calculated Values in the Bazoft Dam Site Ahmad Rastegarnia . Abdollah Sohrabibidar . Vahid Bagheri . Mehdi Razifard . Abbas Zolfaghari Received: 11 July 2016 / Accepted: 20 January 2017 Ó Springer International Publishing Switzerland 2017 Abstract Seepage through foundation and abut- ments of a dam can potentially result in a waste of the water stored in dam reservoir, erosion of founda- tion materials, and development of uplift pressure in dam foundation which, consequently, threatens the long-term stability of the dam. In this study, the grout volume is estimated based on parameters such as joint aperture, the maximum penetration length of the grout, and calculated grout take in Bazoft dam site. Bazoft Dam is a hydroelectric supply and double-curvature arch dam with a height of 211 m located in Cha- harmahal and Bakhtiari Province of Iran. The bedrock of Bazoft dam site consists of Asemari Formation (limy marl and marly lime), in the middle and upper parts of left abutment, and Jahrom Formation (lime- stone and dolomite) in the right abutment, river bed, and lower part of left abutment. The joint apertures were calculated based on the permeability and the joint spacing. Next, the maximum penetration length of the grout and grout volume were calculated. Using a statistical analysis, the relationship of the joint aper- ture, maximum penetration length, and the calculated grout volume with real grout take was also investi- gated. The results show that the grout take can be predicted with appropriate accuracy based on the calculated grout volume. Keywords Bazoft dam site  Trial grouting boreholes  Permeability  Joint aperture  Calculated values 1 Introduction Cement grouting is a method through which the grout material is injected into the joints and cracks or voids of rock and soil formations so that the engineering properties of these materials are improved by the decreased permeability of the layers, enhanced strength of soil layers, and reduced deformability of rock mass. Ground properties are the most important factors in grouting process. The overall properties of joints, which affect grout take and grout penetration, include an aperture, roughness and irregularity of joint surface, spacing, and consistency (Houlsby 1990). A. Rastegarnia (&) Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 15815-3587, Iran e-mail: ahmad.rastegarnia@stu.um.ac.ir A. Sohrabibidar Faculty of Geology, College of Sciences, Tehran University, Tehran, Iran e-mail: asohrabi@ut.ac.ir V. Bagheri  M. Razifard  A. Zolfaghari Department of Geology, Faculty of Science, Tarbiat Modares University, Tehran, Iran e-mail: vahid.bagheri@modares.ac.ir M. Razifard e-mail: mahdirazi.1982@gmail.com A. Zolfaghari e-mail: Zolfaghari.eng@ut.ac.ir 123 Geotech Geol Eng DOI 10.1007/s10706-017-0176-1