Next Article in Journal
Mid-Century Climate Change Impacts on Ouémé River Discharge at Bonou Outlet (Benin)
Previous Article in Journal
A Novel Approach for the Integral Management of Water Extremes in Plain Areas
Open AccessArticle

The Effects of Grout Curtain Parameters on Uplift and Piping Phenomenon; Case Study: Sattarkhan Dam

Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz 51368, Iran
*
Author to whom correspondence should be addressed.
Hydrology 2019, 6(3), 71; https://doi.org/10.3390/hydrology6030071
Received: 31 March 2019 / Revised: 16 July 2019 / Accepted: 16 July 2019 / Published: 17 August 2019
Design of earth dams and their issues during and after construction is very important for residents downstream of the dam because of the potential risks and possible breakdowns. In the design of dams, various forces influence the dam body, including uplift pressure and piping phenomenon which should be considered in order to ensure the safety of the dam. Among the measures taken to prevent the washing away phenomenon, the reduction of the output gradient, and the leakage discharge from beneath the hydraulic structures, construction of the grout curtain and installation of the drainage are applicable. Therefore, in order to investigate the effect of various parameters such as the gradient angle of the grout curtain, length, and distance and the number of grout curtains, as well as the length of the drainage on the pressure and output gradient of the numerical models, were considered in current study. For this purpose, the SEEP/W software was used for modeling on Sattarkhan Dam as a case study. The results of the analysis showed that the use of the Qa’im grout curtain at the upstream of the dam has the highest resistance against the pressure and piping phenomenon. The results also showed that increase in the length of the curtain of the water seal increases safety against uplift and piping phenomenon. The use of further spacing between the two grout curtains under the core of the dam led to increase in overall pressure or reduction in safety against uplift pressure. Increase in the length of the horizontal drainage reduced the effects of uplift pressure and output gradient. Results show that period of 70 to 110 degree is appropriate for curtain angle and setting curtain in upstream of dam core with angle of 70 to 80 degree is optimum and economic. A length of 30 m is optimum for curtain. The number of 2 curtains is also optimum. Studying various scenarios of distance of 2 curtains in dam core indicates that distance of 6 m is optimum and also length of 18 m for horizontal drainage is optimum. View Full-Text
Keywords: grout curtain; piping phenomenon; uplift pressure grout curtain; piping phenomenon; uplift pressure
Show Figures

Figure 1

MDPI and ACS Style

Meshkabadi, K.; Zandi, Y. The Effects of Grout Curtain Parameters on Uplift and Piping Phenomenon; Case Study: Sattarkhan Dam. Hydrology 2019, 6, 71.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop