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List of products by author: A. Rahbar Farshbar
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618 m Vertical Shaft Steel Lining of Uma Oya Project, Sri Lanka
Abstract: Uma Oya Multipurpose Development Project is a hydropower project comprises of two RCC Dams which their reservoirs are connected by a Link tunnel. The water will transfer from first dam reservoir to the other and then it will transferred through a 15.4 km headrace tunnel to the top of a 618 m deep vertical pressure shaft. This shaft provides high pressure water with its suitable head for an...
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Disassembly in Mechanised Headrace Tunnel for the Uma Oya Project, Sri Lanka
Abstract: The breakthrough of the Headrace tunnel in the Uma Oya project done on October 2019, which face a lot of challenges and unforeseeable conditions of 15.4 km. The tunnel excavated by 2 hard rock double shield TBMs which excavated upward & downward without any middle access. One of the TBMs excavated more than 10 km upward and the other one excavated remains parts downward. The plan and location...
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Evaluating an Effective Practical Solution to Reduce the Risks of Excavating 26km
Abstract: Excavation and construction of long industrial tunnels, as one of the major sustainable development’s infrastructures, causes few hundreds of casualties around the world. FARAB Co. despite of performing numerous excavation activities in 10 years and constructed 26km tunnels with 4.3 diameter, using Tunnel Boring Machines (TBM) and Drilling-Blasting method, has achieved the record of 20,000,000...
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Ground Water Control in Headrace Tunnel for the Uma Oya Project, Sri Lanka
Abstract: The breakthrough of the Headrace Tunnel in the Uma Oya project done on the 2nd of October 2019, which face a lot of challenges and unforeseeable geological conditions of 15.4 km. Headrace Tunnel excavated by two hard rock double shield Tunnel Boring Machines (TBMs) with 4.3 m excavation diameter in upward and downward slopes, without any middle access. Upward driven TBM excavated more than 10...
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Innovative Solutions for Safe Designing and Executing of Underground Vertical â©Pressure Shaft
Abstract: Pressure shaft is one the most important parts of the hydro-power plant project along with various OHS hazards for execution team. Professional methods to reduce the hazards at its source and inherent safety-design of FARAB Co. in Uma Oya Multi-purpose Project, reduce risk to acceptable level, break the accident chain, excavation of 620m shaft and executing reverse metal lining, 6...
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Performance of Double Shield TBM in Uma Oya Project, Sri Lanka, Lessons Learned
Abstract: Uma Oya Multipurpose Development Project was recently completed in Sri Lanka. This project involves 2 Rolled Concrete Core (RCC) Dams connected through a tunnel by the Drill and Blast method. The water is transferred from the 2nd regulatory dam through a 15.4 km Headrace Tunnel to the top of a 618 m deep drop shaft that feeds the high-pressure water to an underground powerhouse and turbine...
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Planning in Mechanised Headrace Tunnelfor the Uma Oya Project, Sri Lanka
Abstract: Uma Oya Multipurpose Development Project is in Sri Lanka. This project involves 2 RCC Dams connected by a Link tunnel constructed by D&B method. The water will be transferred from the first dam to the 2nd dam and then it will be transferred through a long 15.4 Km Headrace tunnel to the top of a 618 m deep pressure shaft that feeds the high-pressure water to an underground powerhouse for a...
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Preventive Maintenance in Tunnelling for the Uma Oya Project, Sri Lanka
Abstract: Uma Oya Multipurpose Development Project involves 2 RCC Dams connected by a D&B Link tunnel which will transferred water from first dam to the 2nd dam and then it will be transferred conveyance a 15.4 km Headrace Tunnel to the top of a 618 m deep pressure shaft that feeds to an underground powerhouse for generation of electricity. The Headrace and Tailrace Tunnels are being excavated by two 4.4...
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Understanding Geotechnical Condition s in the Headrace Tunnel ofUma Oya Project, Sri Lanka
Abstract: The breakthrough of the 15.4 km Headrace Tunnel (HRT) of Uma Oya Multipurpose Development Project, which was excavated with two hard rock double shield TBMs of 4.3 m diameter, was achieved on 2nd of October 2019 after water ingress was challenging the excavation operations. One of the TBMs excavated upwards from HRT outlet and the other one excavated downwards from HRT Intake. HRT faced...
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