1、 KS F 2781KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS K F 2781: 2007(2012 ) 2007 12 24 http:/www.kats.go.krKS F 2781: 2007 : ( ) ( ) () () () ( ) : (http:/www.standard.go.kr) : :2007 12 24 :2012 12 17 20120715 : : ( 02-509-7274) (http:/www.kats.go.kr). 10 5 , . KS F 2781: 2007 (2012 ) Steel fiber reinf
2、orced wet-type shotcrete 1 . 1 . 2 , . 2 . . KS F 2402, KS F 2403, KS F 2405, KS F 2408, KS F 2409, ( ) KS F 2422, KS F 2526, KS F 2560, KS F 2563, KS F 2564, KS F 2566, KS F 2567, KS F 2577, KS F 2782, KS F 2783, KS F 2784, KS F 4009, KS L 5201, KS L 5405, 3 3.1 KS F 2781: 2007 2 KS L 5201 . 3.2 KS
3、 F 2526 , KS F 2577 . 3.3 KS F 4009 2 . 3.4 3.4.1 KS F 2782 , , . 3.4.2 . 3.5 . 3.5.1 KS F 2560 . 3.5.2 KS F 2563, KS F 2567 KS L 5405 . 3.6 KS F 2564 . 4 , 1 . , . a) b) c) KS F 2781: 2007 3 d) e) f) g) - h) i) a) i) . 1 aMPa(N/mm2) mm C21bC24 C27 C30 C35 C40 C45 18 20.5 23 25.5 30 34 38 10, 13 3.8
4、 4.2 4.5 a . b 21 MPa . 5 , , , , , . 5.1 , . 2 : mm 80 150 25 5.2 (Cl) 0.30 kg/m3 . 5.3 9.3 1) , . a) 3 1 , 75 % . 1) 28 , . KS F 2781: 2007 4 b) 3 1 , 75 % . 3 68 % , 58 % . 5.4 90 % . 6 . 7 7.1 4. 5. , 10. . 7.2 , . 8 8.1 8.1.1 . a) , . b) , , . 1 . c) , . 8.1.2 KS F 4009 8.1.2 8.1.3 . 8.2 , , ,
5、KS F 4009 8.2, 8.3 8.4 . 8.3 5. , . KS F 2781: 2007 5 9 9.1 KS F 2783 . 9.2 KS F 2402 . 9.3 9.3.1 KS F 2784, KS F 2405, KS F 2422 . 9.3.2 KS F 2784, KS F 2403, KS F 2408, KS F 2422 . 9.3.3 KS F 2784, KS F 2422 KS F 2566 . 9.4 A . 9.5 KS F 2409 . 9.6 . ( .) . 10 10.1 , , , , . 10.2 5. 9.2 , 5.1 . 10.
6、3 KS F 4009 9.6 , 5.2 . KS F 2781: 2007 6 . 10.4 200 m3 1 1 1 . , , 9.3 5.3 . 10.5 , 9.4 5.4 . 11 . KS F 2781: 2007 7 A ( ) A.1 . A.2 a) KS F 2409 3. . A.3 , . , . A.3.1 ( A) . . A.3.2 ( B) 3 KS F 2784 . 75 150 mm 75 150 mm , 1 2 . A.4 A.4.1 ( A) a) (Vd) KS F 2409 , KS F 2409 , . b) , (Mf) 0.1 g . A
7、.4.2 ( B) a) , (B) (C) , () . KS F 2781: 2007 8 24 , . , . b) , (Mf) 0.1 g . A.5 . A.5.1 dffVMC = Cf: (kg/m3) Vd : (m3) Mf : (kg) A.5.2 a) )( CBVh= Vh: (m3) B : (kg) C : (kg) : (kg/m3) A.1 kg/m3 kg/m310 11 12 13 14 15 16 17 18 19 20 999.728 999.634 999.526 999.406 999.273 999.129 998.972 998.804 998
8、.625 998.435 998.234 21 22 23 24 25 26 27 28 29 30 998.022 997.801 997.569 997.327 997.075 996.814 996.544 996.264 995.976 995.678 b) KS F 2781: 2007 9 hffVMC = Cf: (kg/m3) Vh: (m3) Mf: (kg) KS F 2781: 2007 10 KS F 2781: 2007 . 1 , . NATM(New Austrian Tunnelling Method: NATM) , NATM . 1970 , , NATM
9、. . , 40 60 MPa , 2 . , Laerdal (24.5 km, , 40 MPa) PCL , , . 1980 3, 4 NATM , , , , , KS . , 21 MPa , . , . , , . . 2 , . KS F 2781: 2007 11 , . , , , (toughness) . , , , , KS . 3 3.1 , . , , , , , . Wire Mesh , (rebound ratio) Wire Mesh , (Steel Fiber Reinforced Shotcrete) Wire Mesh 33.6, 64.8 %,
10、0.8 % . . 1 Wire Mesh Reinforced Shotcrete Steel Fiber Reinforced Shotcrete . a) b) 1 SFRS WMRS Plain Shotcrete WeldedWire Mesh Mesh Pinnedto rock Cover to Mesh Steel Fiber Reinforced Shotcrete Rock RockKS F 2781: 2007 12 , , , , ( ) , “ .” . (dry-mix) (wet-mix) . ( ) , , . (6 8 m3/hr), 20 40 % , .
11、( ) 79.2 %, 19.2 %, 1.6 % . 3.2 a) KS L 5201 . , . . KS L 5201 KS L 5210( ), KS L 5211( ) . : , , , , . b) 2002 KS F 2577 . , 60: 40 . , . 0.2 mm , . 2.5 3.3 0.08 mm 2 % . KS F 2781: 2007 13 . , . , , , , , . , . . KS F 2577 1 , ACI 506.2 ASTM C 1436 10 mm, 13 mm . 10 mm , ASTM C 1436 . 1 % 1 2 13 mm 90 100 100 10 mm 40 70 100 90 100 5 mm 0 15 95 100 95 100 70 85 2.5 mm 0 5 80 100 80 98 50 70 1.2 mm 50 85 50 85 35 55 0.6 mm 25 60 25 60 20 35 0.3 mm 10 30 10 30 8 20 0.15 mm 2 10 2 10 2 10 c) , , , , . , 90 % . , , ( ) . . KS F 4009 2 . d) (急結劑 ) . . , . KS F 2781: 2007 14 . .
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