The quiz may be taken as many times as necessary to successful pass and complete the course. Engineering geological and geotechnical investigations. Geological section of kaligandaki a headrace tunnel. The headrace tunnel is a major part of the hydropower project as it connects the reservoir to the power station. The geotechnical report on site investigations, including the interpretation of the results of site and laboratory tests. Practices in planning, design and construction of head race tunnel of a hydroelectric project. The headrace tunnel carries water from intake to the power house by connecting the desilting chamber to the surge shaft, from where water is further carried to. Prediction of tunnel deformation in squeezing grounds. Part 4 obstacles and mitigation course satisfies five 5 hours of professional development. The hydropower station with a super long headrace tunnel is a. During the first filling of the shaft and the tunnel, increasing leakage through a micaschist layer was observed. Mrt nel c706, design of bored tunnels along race course. Students must achieve a minimum score of 70% on the online quiz to pass this course.
Tunnel design shall follow the above dimensions and clearance in height for the traffic is determined as 5. Design of reinforced concrete linings of nn2 headrace tunnel aphichat sramoon1, parin mruetusatorn1, beni lekhak2, rawee sittipod3 1 geotechnical and foundation engineering co. Conventional design places the pushrods along side a rectangular shaped intake port. Whether race, piste or freeride, beginner or professional, the head ski collection has something for you. Segmental tunnel linings steady development in shielded tunnel excavation rates. The chuzachen hydroelectric power project is located in sikkim state in northeastern part of india. Headrace tunnel takes water from connecting channels and convey it to the fore bay or directly to the penstock provided with surge shaft depending upon the project and site requirements some times also known as power tunnels. Oskar sigl and georg atzl, c706 design of bored tunnels along race course rd. Hydraulic design of surge shaft definition and design of. The tunnel passes 380 m 1,247 ft below the jhelum river and through its bend.
A tunnel hull design that is easy to build, no prop shaft or universal joints to buy a great project if you have little time to spare. Pervious pressure tunnel overburden and lateral extens. Urban tunnel design using numerical analysis tunnel excavation and support is traditionally an empirical art numerical analyses are useful in the following cases. Design and construction of cast insitu steel fibre reinforced concrete. Design, dimensions, and operating characteristics of the. For all recreation, performance family hulls, utilityfishing hulls, race hulls or even rc models.
Headrace tunnels definition, uses and types of headrace. A norwegian firm completed the feasibility study and detailed design of. In hydroelectric project hepss, monitoring and upkeep of hrt head. General layout and profile of a high head diversion canal development the main parts of a high head diversion canal type plant are. The gilgel gibe ii consists of a power station on the omo river that is fed with water from a headrace tunnel and sluice gate on the gilgel gibe river. This thesis is to focus on the two head race tunnels within the melado hpp, which together account 16. Model tunnel and support in two stages the actual tunnel and support under design can now be analysed in two stages. This is one of the longest head race tunnels in india with maximum overburden height of mountain above tunnel of 1470 m, claims hcc. Engineering geological and geotechnical investigations along. Challenges of design and construction of a highway tunnel. Existing tunnel was classified as aa in the manual mentioned in 9. The geological report presenting the results of the geological and geophysical survey. Anticipated tunnel execution technology is natm new austrian tunnel method.
The tunnel layout presented below is the result of adapted design to the ground findings from investigations, together with the project specific minimum requirements. The glendoe headrace tunnel is part of the works associated with the. The course is designed as a distance learning course that enables the practicing professional engineer to identify and handle many of the hurdles encountered during tunnel construction. Design and evaluation of a lowspeed windtunnel with. Design and construction of under river crossing of head race. The steellined part of the pressure shaft starts at an altitude of 1,040 m a. The course is designed as a distance learning course that enables the practicing professional engineer to understand the planning process of a road tunnel project. Geotechnical risk is dealt with contractually in designbidbuild contracts by. Water filling in head race tunnel of neelum jhelum. Jul 18, 20 the head race tunnel faced severe squeezing due to above mentioned geological conditions.
Design of reinforced concrete linings of nn2 headrace tunnel. Approved continuing education for licensed professional engineers design and construction of road tunnels. The project will geerate n 161 mw of firm power with an annual energy generation benefit of 3592 mu in a 90% dependable year. In stage i of modelling, the modulus of elasticity of the material to be excavated from the tunnel is reduced by the ratio established above. Segmental concrete tunnel liners tunneling short course. Head race tunnel is also dependent on the sediment concentration.
Three main types of high head power developments may be discerned. Part 3 design and detailing ezekiel enterprises, llc. Pdf ground response studies for the design of head race. The project has two intakes each with a storage reservoir and a head race tunnel, both joining together to a common large headrace tunnel, an. There are different definitions for headrace tunnels hrt used in different scenarios. Tunnels shorter than 500 m are designed with an emergency lane along its total length, and tunnels longer than 500 m are designed with laybys at a maximum distance of m instead. On paper this combination of the head design with the new 4 bolt main 302, looked unbeatable. The project consists of two interconnected reservoirs on rangpoand rongli rivers with an installed capacity of 99mw. Featuring the latest technologies, superb design and delivering the best performance in all conditions, this is where your ultimate skiing experience begins. The course is designed as a distance learning course that enables.
To give the future hydropower system the flexibility and behavior required to serve the demand from market, grid, bilateral power cables, new industry, new materials and advances in turbine and generator design, tunnel systems and penstocks must be designed different from the state of the art technology. Part iii hydraulic design was first published in 1968. Definition, uses and types of headrace tunnels aboutcivil. The tunnel was supported with steel ribs at 1 m spacing c. The basics documents for tunnel design should include or cover. Flyer 5 cu inch class hydroplane race craft 14 scale frame plans. The overhead valve pushrod engines competed for space with the intake ports. Pervious pressure tunnel overburden and lateral extension. Criticalities encountered in construction of hrt head. There are different definitions for headrace tunnel hrt used at different scenarios. Guidelines or the structural detailing of the tunnel lining and national recommendations on tunnel design are also given.
Todays design, construction and operation of unlined pressure tunnels and shafts are. Building a closedcircuit tunnel, however, would have exceeded my space and monetary constraints, so i opted for an opencircuit design. The tunnel is expected to pass through muree formations of the himalayas which are influenced by regional and local faults and shear zones. Calculation of ground surface settlements design of face pretreatment in difficult ground conditions selection among alternative methods sensitivity analyses. The initial design for underground excavation considered the use. All other model parameters including in situ stresses. Lacsd clearwater tunnel will have posttensioned segments for internal pressure in soft ground, which will be the first application of this type in usa.
Preliminary design for road tunnels on transeuropean vc. Ground response studies for the design of head race tunnel hrt. For an open channel, the headrace crosssection could be. Karnchang lao company limited, vientiane, lao pdr 3 nam ngum 2 power company limited, vientiane, lao pdr abstract the design of the pressure tunnel is. Filling and pressurizing of the headrace tunnel for the. Layout of hydropower scheme waterway highlighted blue. Race tunnels is a critical task for proper operation and safety of the plant especially in. Intake gate intake trashrack headrace tunnel anchor block surge tank penstock inlet valve tunnel inlet trashrack. Empirical and numerical analyses for support system design in head race tunnel.
Practices in planning, design and construction of head race. While the tunnel boat derives much of its high performance from air lift, it depends at the same time on its planing interaction with the water to maintain a stable and controlled flight. Headrace tunnel of upper tamakoshi hydroelectric project. With this, 92% of the total work of the project is completed.
Abstracta channel tunnel, which carries the water to the penstockpressure shaft is called head race tunnel hrt. The dam diverts up to 280 m 3 s 9,888 cu fts of the neelum southeast into a 28. Headrace tunnel takes water from connecting channels and convey it to the fore bay or directly to the penstock provided with surge shaft depending upon the project and site requirements some times also. In order to execute the river crossing of rep, a diversion tunnel. Pdf ground response studies for the design of head. The design of unlined hydropower tunnels and shafts. This revision has bccu taker up with a view to keeping abreast with the technological developments that have taken place in the field of tunnel design and con. When the water reaches the power station, it powers four pelton turbines that operate four 107 mw.
Water conductor system water conductor system consists of head race tunnel of suitable size. Water filling in head race tunnel of neelum jhelum hydropower. This water has served its purpose, and leaves the power generation unit or water wheel area in hydroelectric dams, the tail race is at a much lower level than the height of the. Water conductor system may consist of tunnel, channel, cut and cover as per the topography involved. Abstract an investigation of the engineering geological properties and geotechnical parameters of rock masses along a horseshoeshaped head race tunnel hrt in the teesta stageiii hydroelectric project, sikkim, india, was carried out to analyze the rock mass. Read this article to learn about the following six components of hydro power plant, i. Headrace tunnel stability in the neelumjhelum hydroelectric. My personal data is being processed by head sport gmbh, mares s. Twin 10 km long parallel headrace tunnels were excavated as part of the head race tunnel system for the neelum jhelum hydroelectric project. The headrace tunnel runs 26 km 16 mi under the fofa mountain and at its end, it converts into a penstock with a 500 m 1,600 ft drop.
The water conductor system conveys water to penstock. Practices in planning, design and construction of head. Water filling in head race tunnel of neelum jhelum hydropower project starts on march 1, 2018. The tunnel has been designed using the natm concept. Kong ap design, mwh australia pty ltd, level 3, 35 boundary street, south brisbane, qld 4101, australia w. Aside from reducing the user load on the larger mtl wind tunnel by. Numerical verification of empirically designed support for a. After five years since its initiation, the headrace tunnel of the upper tamakoshi hydroelectric project uthep has been completed. Design and construction of tunnel through such a complex and varying geology with a rock cover of more than m is a difficult and challenging taks.
Headrace tunnel anchor block surge tank penstock inlet valve tunnel inlet trashrack tunnel inlet anchor block exp. Part 1 planning course satisfies five 5 hours of professional development. Pdf design of concrete linings of pressure tunnels and. Part 2 methodology and excavation support course satisfies five 5 hours of professional development. Criticalities encountered in construction of hrt head race. This interdependence of hydrodynamic and aerodynamic design is the key to the approach to tunnel design. The glendoe tunnel collapse in scotland springerlink. The project consists of two interconnected reservoirs on rangpoand rongli rivers with an. The water in this channel has already been used to rotate turbine blades or the water wheel itself.
Selection and design of the support system are only two of many interrelated factors in the overall design of a serviceable and economical tunnel. A closedcircuit design minimizes the energy requirement and hence cost of operating a tunnel and, at least in principle, makes it easier to achieve uniform flow. It is necessary to know the general topography, geology of the area, state of stress and other mechanical properties of the strata. Thus, the total width of the tunnel is about 12 m and the height is about 7 m. The principle the water conduits of a traditional high head power plant. Pdf groundwater ingress in head race tunnel of tapovan. Part 2 methodology and excavation support ezekiel enterprises, llc course description. Ksb offers a broad range of pump types to meet the most varied requirements. Impact of construction method and ground composition on. Problem statement in hydroelectric project hepss, monitoring. Svrt design ground motion pga for the tunnel segment. Design of a throttled surge tank for refurbishment by.
Design discharge is the amount of water to be carried by the headrace tunnel of specific diameter with a pre defined longitudinal slope, greater the slope more will be the velocity of water through headrace tunnel and hence more will be head losses. The tail race, containing tail water, is a channel that carries water away from a hydroelectric plant or water wheel. Design of concrete lining for head race tunnel using. Since the tunnel lining is subjected to combination of axial force and bending moment, the design is conveniently carried out using the capacity interaction curve, also called the figure 4. The empirically designed support was installed in the model prepared in the. Drawings of plan and profile of main civil structures headrace tunnel, surge tank. I consent to receive emails with offers, news, surveys and contests, regarding head groups product range and services. The most advanced publication on tunnel hull design, how a tunnel hull works, and detailed explanation of design and setup for tunnel boats, power cat, or modified vee hulls. Design and construction of under river crossing of head race tunnel rampur hydro electric project 412 mw. Mrt nel c706, design of bored tunnels along race course road. This water has served its purpose, and leaves the power generation unit or water wheel area.
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