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Curtain Grouting for the Antamina Dam, Peru: Part 2—Implementation and Field Modifications
Curtain grouting for the 140 m high dam at the Antamina Mine in the Peruvian Andes involved nearly 40,000 m of drilling and injection of 2,800 tons of cement. The curtain is 780 m long and as much as 95 m deep. This paper, the second of two, addresses execution of the grouting including required design modifications. The accompanying paper ("Curtain Grouting for the Antamina Dam, Peru: Part 1 — Design and Performance") presents the design and achieved performance of the curtain during reservoir impoundment. Grouting was specified using the GIN system. However, this led to formation damage and little reduction in the hydraulic conductivity of the rock. Following detailed analysis of the ground response to grout, using electronically acquired pressure/flow data, grouting procedures were revised to blend the best of the GIN approach with the key components of the Australian Method. Routine water pressure tests verified curtain closure. Final conductivities were less than 1.5 Lugeons (including the karst region), with many zones about 0.1 Lugeons.
Curtain Grouting for the Antamina Dam, Peru: Part 2—Implementation and Field Modifications
Curtain grouting for the 140 m high dam at the Antamina Mine in the Peruvian Andes involved nearly 40,000 m of drilling and injection of 2,800 tons of cement. The curtain is 780 m long and as much as 95 m deep. This paper, the second of two, addresses execution of the grouting including required design modifications. The accompanying paper ("Curtain Grouting for the Antamina Dam, Peru: Part 1 — Design and Performance") presents the design and achieved performance of the curtain during reservoir impoundment. Grouting was specified using the GIN system. However, this led to formation damage and little reduction in the hydraulic conductivity of the rock. Following detailed analysis of the ground response to grout, using electronically acquired pressure/flow data, grouting procedures were revised to blend the best of the GIN approach with the key components of the Australian Method. Routine water pressure tests verified curtain closure. Final conductivities were less than 1.5 Lugeons (including the karst region), with many zones about 0.1 Lugeons.
Curtain Grouting for the Antamina Dam, Peru: Part 2—Implementation and Field Modifications
Ritchie, D. G. (author) / Garcia, J. P. (author) / Amaya, F. (author) / Jefferies, M. G. (author)
Third International Conference on Grouting and Ground Treatment ; 2003 ; New Orleans, Louisiana, United States
Grouting and Ground Treatment ; 929-940
2003-01-29
Conference paper
Electronic Resource
English
Mixing , Compaction , Dams , Peru , Grouting , Jet grouting
Curtain Grouting for the Antamina Dam, Peru: Part 2-Implementation and Field Modifications
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