Kurobe-river hydropower plant

Kurobe No.4 Dam (image photo in summer)

From downstream2002.6.4Me

Member

MapKanden tunnel(for Kurobe No.4) Kurobe No.4

High temp. tunnel(for Kurobe No.3)Kurobe No.3

Kurobe-river

0 200 400 600 800 1000 1200 1400 16000

500

1000

1500

2000

Mecon（Thailand)

la Seine（France)

利根川

木曽川

黒部川Kurobe

Sea

leve

l (m

)

Distance from the sea (km)

Best place to construct damRiver slope 1/40Annual precipitation 3800mm

But very difficult to construct→

日電歩道Road (only 60cm wide)

Tunnel to dam

No.3 dam

No.4 dam

High temperature tunnel 高熱随道To carry materials & machines to construction site (Kurobe No.3)

Total length 904m (1936-1945)

Hot spring zone- Maximum temp. of the rock 165℃

cool by water

-Corrosion of concrete by Sulfuric acid硫酸によるコンクリートの腐食→

Kanden tunnel 関電トンネルTo carry materials & machines to construction site (Kurobe No.4)

Very weak rock zone 破砕帯(water gush 500l/sec, 4℃)

82.6m … ７ months (usual 10m/day)cement improvementmany tunnels for drain800 million yen （8億円）

Kurobe No.4 dam1956 start to construct1963 completionCost 51.3 billion yen

(513億円)

Many rock tests were doneto estimate strength of rock

Highest in Japan

General plan

Longitudinal section

Rock testsTest block (concrete)3.75m×2.5m×1.9m

Concrete

Rock

Concrete

Rock

6 shear tests on blockelse ;2 shear tests on rock2 shear tests on fault material12 triaxial compression tests on rock3 triaxial compression tests on fault material

hydropower plant No.4

Uninhabited driveRemote control system

Many victimKurobe No.3 Kurobe No.4

1941-1945 year 1956-1963

cost 51.3 billion yen

300 people victim 171 people

Books and movie (in Japanese)

「黒部の太陽」木本正次著

映画「黒部の太陽」石原裕次郎主演

「高熱随道」吉村昭著