VARDNILI HPP

BASIC DATA FOR HPP CONSTRUCTION PROJECT (PROVISIONS FOR TECHNICAL ASSISTANCE SERVICES)

VARDNILI HPP - I

on the ERISTSKALI RIV.

CUSTOMER: Sakmtavarenergo
GEN. DESIGNER: Hydroproject (Tbilisi)
GEN. CONTRACTOR: Sakhydroenergomsheni
TECHNICAL ASSISTANCE / SERVICES
of GEN. CONTRACTOR:
Orgenergomsheni

PARAMETERS:
Capacity, MW 220
Power output, GWh 700
Reservoir storage, mln m3 7/145
Rated water discharge, m3/s 425
Discharge through waterways, m3/s 710
Rated head, m 559
TYPE OF REGULATION: Seasonal
SCOPE OF WORKS:
Excavation, ths m3 2074
Filling, outlining, drainages and filters, ths m3 3342
Contact grouting including joint grouting, ths m2 12
Grouting of foundation, including consolidation grouting, ths m2 43
Concrete and reinforced concrete, ths m3 138
Installation of structural metal elements and mechanisms, ths t 43
YEAR OF START UP: 1971
DURATION OF THE CONSTRUCTION OF GENERAL UNITS, month 60

Diagram of VARDNILI HPP-I
1. low level outlet gates shaft;
2. river diversion tunnel;
3. water intake;
4. penstock;
5. spillway;
6. power house;
7. switch yard;
8. rock and earth fill dam.

ROCK AND EARTH FILL DAM of VARDNILI HPP-I

PARAMETERS:
Height, m 58
Thickness:
at the crest, m 10
at the contact with foundation, m 195
Arch crest length, m 890
GEOLOGICAL CONDITIONS:
Tertiary semi-rock deposits, dense clay, sandstone, conglomerates
SCOPE OF WORKS:
Excavation, ths m3 87
Earth and rock filling, ths m3 2191
Including:
Rock dumping, ths m3 1191
Conglomerate lining, ths m3 810
Drainage and filters, ths m3 190
Contact grouting and joint grouting, ths m2 12
Grouting of foundation, including consolidation grouting, ths m2 43
Concrete and reinforced concrete, ths m3 30

Dam of VARDNILI HPP-I
1. Rock fill;
2. Filter
3. Armoured concrete stone
4. Loam screen
5. Rock loading.

TRAILRACE CANAL FROM VARDNILI HPP-I TO BLACK SEA

PARAMETERS:
Lenght, m 23300
Including:
Lining sections, m 860
Width at bottom , m 45/60
Width at top, m 60/120/150
Depth, m 6/12
Hillsides 1:2/1:2.5
Water discharge, m3/s 710/756
GEOLOGICAL CONDITIONS:
First interval – conglomerates, sandstones and clays; thereafter – alluviums, proluviums and marsh formations
SCOPE OF WORKS:
Excavation, ths m3 9322
Filling, ths m3 663
Concrete and reinforced concrete lining, ths m3 12


Trailrace Channel from VARDNILI HPP-I to BLACK SEA
1. VARDNILI HPP I
2. VARDNILI HPP II
3. VARDNILI HPP III
4. VARDNILI HPP IV
5. Tailrace Tunnel Enguri HPP
6. Underground Powerhouse of Enguri HPP;

VARDNILI HPP – II, III, IV On the Trailrace Channel from
VARDNILI HPP-I to BLACK SEA

CUSTOMER: Sakmtavarenergo
GEN. DESIGNER: Hydroproject (Tbilisi)
GEN. CONTRACTOR: Sakhydroenergomsheni
TECHNICAL ASSISTANCE / SERVICES
of GEN. CONTRACTOR:
Orgenergomsheni

PARAMETERS:
Capacity, MW 3x40   120
Power output, GWh 3x127     400
Rated water discharge, m3/s 425
Rated head, m 11
TYPE OF REGULATION: Seasonal
MAIN STRUCTURES:
The 3 Hydropower plants of a similar type are located on the trailrace channel 23300 m long. Each power plant comprises power house on the canal, abutments, piers and 110 kW switchyard.
SCOPE OF WORKS:
Excavation, ths m3 1668
Filling, outlining, drainages and filters, ths m3 729
Concrete and reinforced concrete, ths m3 248
Installation of structural metal elements and mechanisms, ths t 5
YEAR OF START UP: 1973-77
DURATION OF THE CONSTRUCTION OF MAIN BUILDINGS 66


Section through the Centre Line of the VARDNILI HPP-II, III, IV Power Unitე

Vardnili HPP Cascade – Technical assistance component services of construction HPP-I, II, III, IV

Buildings Designation of construction and mounting works S e r v i c e s Work execution period, years
Works organization projects Works execution projects Areas construction bases and temporary communications projects Supervision for implementation of given projects Consulting of technical and industrial issues
1 2 3 4 5 6 7 8 9
1 Rock and Earth-Fill Dam with the loamy screen of the HPP-I Working out of the Dam foundation ditch + + + + 1972÷1982
2 Rock and Earth-Fill Dam with the loamy screen of the HPP-I Filling of the rock and loamy screen, with the compression technology + + + +
3 Rock and Earth-Fill Dam with the loamy screen of the HPP-I Arrangement of slope with the armored concrete stone and rock loading + + + +
4 Tailrace Channel from HPP-I to Black Sea Working of the channel + + + + +
5 Abutments and piers, of the HPP-II, III, IV disposed on the tailrace channel Construction of the abutments and piers + + + + +

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