C-3-1. Inlet Flumeat Gate. BoxCulvert (Open Flow) MainCanal(C 1) km Outlet Flume. BoxCulvert (OpenFlow) WL m. WL.40.
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1 WL m WL m WL m MainCanal(C 1) km Inlet Flumeat Gate BoxCulvert (OpenFlow) yyyyy WL m WL m DRAINAGECanal R.D WL m(Design Flood +49.5cum/s BoxCulvert (Open Flow) Outlet Flume C-3-1
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8 Energy Energy Velocity Water Water Bed Structure Station Distance Discharge Loss Line EL. Velocity Head Level Depth Elevation Remarks L (m) Q (m 3 /s) hl (m) EH (m) V (m/s) Vh (m) WL (m) d (m) BL (m) Canal P.R. (C-1) Inlet hl 1 = hi Inlet Flume at Gate hl 2 = hf Inlet Transition of Box Culvert hl 3 = he + hf Inlet of Box Culvert(Pipe Flow) hl 4 = hsc Box Culvert (Pipe Flow) hl 5 = hf Outlet of Box Culvert hl 6 = hv Outlet Flume WL m WL m WL m MainCanal(C 1)km Inlet Flume at Gate BoxCulvert (Pipe Flow) DRAINAGECANALR.D WL m(2011Max.+49.5cum/s) BoxCulvert (Pipe Flow) Outlet Flume C-3-8
9 (1) Design discharge and no. of barrel - Design discharge Q = m 3 /s = Qd Design discharge per barrel Q 1 = m 3 /s/barrel - No. of barrels of conduit N = 3 nos. (2) Hydraulic conditions at beginning section (Canal P.R. (C-1) km ) - Water level FWL WL 0 = m - Base elevation EL 0 = m - Water depth h 0 = m -Velocity V 0 = m/s - Roughness coefficient n = (Concrete) - Acceleration of gravity g = 9.8 m/s 2 (3) Head loss coefficient at open transition Changing condition of Gradual contraction Gradual enlargement open transition formation coefficient fgc coefficient fge Rectangular to rectangular Trapezoidal to trapezoidal Rectangular to circular with fillet Trapezoidal to rectangular with twisted wall Trapezoidal to circular with twisted wall Trapezoidal to rectangular with bended wall Trapezoidal to circular with bended wall C-3-9
10 (1) Discharge per barrel of inlet flume Q 1 = m 3 /s/barrel (2) Hydraulic conditions at beginning section (Canal P.R. (C-1) km ) - Water level WL 0 = m - Base elevation EL 0 = m - Water depth h 0 = m -Velocity V 0 = m/s - Velocity head V 0 2 / 2g = m (3) Change of water level due to inflow hi = hi + ( V 1 2 / 2g - V 0 2 / 2g ) hi = fi ( V 1 2 / 2g - V 0 2 / 2g ) where, hi : Head loss due to inflow fi : Head loss coefficient due to inflow In case, square cut fi = 0.50 a) Assumed hi hi = m b) Beginning section of inlet flume (after inflow - Base elevation EL 1 = m -Width b 1 = m - Water depth h 1 = m = WL 0 - EL 1 - hi -Flow area A 1 = m = b 1 h 1 -Wetted perimeter P 1 = m = b 1 + 2h 1 - Hydraulic radius R 1 = m = A 1 / P 1 -Velocity V 1 = m/s = Q 1 / A 1 - Velocity head V 2 1 / 2g = m EL 1e = m c) Calculation of hi and hi hi = m (4) Water level at beginning section of inlet flume (after inflow (5) Length and bed slope of inlet flume hi = m = Assumed hi OK WL 1 = m = WL 0 - hi -Length L 2 = m - Bed slope I 2 = Level (6) Change of water level due to friction hf 2 = hf 2 + ( V 2 2 / 2g - V 2 1 / 2g ) hf 2 = ( n Vm 2 / Rm 2/3 2 ) 2 L 2 where, hf 2 : Head loss due to friction Vm 2 : Mean velocity Vm 2 = ( V 1 + V 2 ) / 2 Rm 2 : Mean hydraulic radius Rm 2 = ( R 1 + R 2 ) / 2 a) Assumed hf 2 hf 2 = m b) end section of inlet flume - Base elevation EL 2 = m = EL 1 -Width b 2 = m = b 1 - Water depth h 2 = m = WL 1 - EL 2 - hf 2 -Flow area A 2 = m = b 2 h 2 -Wetted perimeter P 2 = m = b 2 + 2h 2 - Hydraulic radius R 2 = m = A 2 / P 2 -Velocity V 2 = m/s = Q 1 / A 1 - Velocity head V 2 2 / 2g = m c) Calculation of hf 2 Vm 2 = m/s Rm 2 = m hf 2 = m (7) Water level at end section of inlet flume hf 2 = m = Assumed hf 2 OK WL 2 = m = WL 1 - hf 2 WL2e = m = C-3-10
11 (1) Design discharge of inlet transition Q = m 3 /s (2) Length and bed slope -Length L 3 = m - Bed slope I 3 = (3) Change of water level due to gradual enlargement hge = hge + hf 3 + ( V 3 2 / 2g - V 2 2 / 2g ) hge = fge ( V 2 2 / 2g - V 3 2 / 2g ) hf 3 = ( n Vm 3 / Rm 3 2/3 ) 2 L 3 where, hge : Head loss due to gradual enlargement hf 7 : Head loss due to friction Vm 7 : Mean velocity Vm 3 = ( V 2 + V 3 ) / 2 Rm 7 : Mean hydraulic radius Rm 3 = ( R 2 + R 3 ) / 2 fge : Head loss coefficient due to gradual enlargement In case, straight line formation fge = 0.00 a) Assumed hge hge = m (rising) b) End section of inlet transition - Bed elevation EL 3 = m -Bed width b 3 = m - Water depth h 3 = m = WL 2 - EL 3 - hge >3.6m Box H -Flow area A 3 = m = b 3 h 3 -Wetted perimeter P 3 = m = b 3 + 2h 3 - Hydraulic radius R 3 = m = A 3 / P 3 -Velocity V 3 = m/s = Q / A 3 - Velocity head V 2 3 / 2g = m EL 3e = c) Calculation of hge Vm 3 = m/s Rm 3 = m hf 3 = m hge = m hge = m = Assumed hge OK (4) Water level at end section of inlet transition (BP of box culvert) WL 3 = m = WL 2 - hge WL3e = m = WL2e C-3-11
12 (1) Discharge per barrel of conduit Q 1 = m 3 /s/barrel (2) Head loss due to sudden contraction A 3 / A 2 ' fsc hsc = fsc V 2 4 / 2g where, hsc : Head loss due to sudden contraction fsc : Head loss coefficient due to sudden contraction (Refer to the right table) a) Before contraction Width per channel b 3 ' = m = b 3 / N - Water depth h 3 ' = m = h 3 - Flow area A 3 ' = m = h 3 *'b3 -Wetted perimeter P 3 ' = m = h 3 *2+b3 - Hydraulic radius R 3 ' = m = A 3 ' / P 3 ' -Velocity V 3 ' = m/s = Q 1 / V 3 ' - Velocity head V 3 ' 2 / 2g = m EL3'e b) After contraction (Beginning section of conduit) - Base elevation EL 4 = m = EL 3 - Width of channel b 4 = m - Water depth h 4 = m -Flow area A 4 = m = b 4 h 4 -Wetted perimeter P 4 = m = 2 x (b 4 + h 4) - Hydraulic radius R 4 = m = A 4 / P 4 -Velocity V 4 = m/s = Q 1 / A 4 - Velocity head V 2 4 / 2g = m c) Calculation of hsc A 4 / A 3 ' = 0.64 fsc = 0.18 (Refer to the table above) hsc = m = EL4e = m = EL3'e-hsc4 (3) Length and bed slope of conduit -Length L 5 = m - Bed slope I 5 = (4) Head loss due to friction hf 5 = ( n Vm 5 / Rm 5 2/3 ) 2 L 5 where, hf 5 : Head loss due to friction Vm 5 : Mean velocity Vm 5 = ( V 4 + V 5 ) / 2 Rm 5 : Mean hydraulic radius Rm 5 = ( R 4 + R 5 ) / 2 a) Beginning section of conduit - Base elevation EL 4 = m - Width of channel b 4 = m - Water depth h 4 = m -Flow area A 4 = m -Wetted perimeter P 4 = m - Hydraulic radius R 4 = m -Velocity V 4 = m/s - Velocity head V 2 4 / 2g = m b) End sections of conduit (UNIFLOW) - Base elevation EL 5 = m Width b 5 = m = b 4 - Water depth h 5 = m = h 4 -Flow area A 5 = m = b 5 h 5 -Wetted perimeter P 5 = m = 2b 5 + 2h 5 - Hydraulic radius R 5 = m = A 5 / P 5 -Velocity V 5 = m/s = Q 1 / A 5 - Velocity head V 2 5 / 2g = m c) Calculation of hf 5 Vm 5 = m/s Rm 5 = m hf 5 = m = OK EL5e = m = EL4e-hf5 C-3-12
13 (1) Drainage Canal Max 2011WL+49.5cuFood WL = m (2) Change of water level due to closed conduit WL 6e = WL of Open at Drainage Canal at D.R.15.8 = EL 5e - V 5 2 / 2g = m m = m = EL 6e > m OK C-3-13
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15 Design Seciton Unit weight of reinforced concrete c : 2.40 (t/m3) Unit weight of soil (saturated) sat : 2.15 (t/m3) Unit weight of soil (wet) s : 1.90 (t/m3) Unit weight of soil (under water) ' : 1.15 (t/m3) Unit weight of water w : 1.00 Internal friction angle : 30 (degree) seismic coefficient k : 0.00 Coefficient of earth pressure (Normal) ka : Live load (Truck loading) P : 8.40 (t/wheel) A-4-F- 1 C-3-15
16 Design Seciton A-4-F- 2 C-3-16
17 Design Seciton A-4-F- 3 C-3-17
18 Member Point B H D DD M S N (cm) (cm) (cm) (cm) ( t.m) ( t ) ( t ) 1, 5 upper out-mmax , 5 lower out-mmax , 5 in-mmax , 4 edge out-mmax , 4 mid.jt. out-mmax , 4 in-mmax out-mmax in-mmax , 10 right , 10 left , 8 edge out-mmax , 8 mid.jt. out-mmax , 8 in-mmax out-mmax in-mmax Member Point M S N B H D DD ( t.m ) ( t ) ( t ) (cm) (cm) (cm) (cm) Side wall 1,5 upper outside lower outside inside Partition wall 9,10 both sides Top slab 2, 3,4 upper edge jt upper mid. jt lower Bottom slab 6,7,8 lower edge jt lower mid. jt upper A-4F-1 C-3-18
19 Distributing bar: <Cover> All member of framwork : 5cm D20@0.20 D20@0.10 D20@0.20 D20@0.10 D20@ D20@0.10 D20@0.10 D20@0.20 D20@ D20@0.20 D20@0.20 D20@0.20 D20@0.20 D20@0.20 D20@ D20@0.10 D20@0.10 D20@0.20 D20@0.10 D20@0.20 D20@0.10 D20@ C-3-19
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30 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 1 Introduction Thai - English translation C-3-30
31 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 1 Introduction C-3-31
32 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 1 Introduction C-3-32
33 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 1 Introduction C-3-33
34 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Thai - English translation C-3-34
35 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-35
36 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-36
37 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-37
38 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Open-Channel Hydraulics Design of Small Structures C-3-38
39 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-39
40 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Open-Channel Hydraulics Design of Small Structures C-3-40
41 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-41
42 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Design of Small Structures Design of Small Structures Design of Small Structures C-3-42
43 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Design of Small Structures Design of Small Structures C-3-43
44 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Canals and Related Structures C-3-44
45 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Small Canal Structures Design of C-3-45
46 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Design of Small Canal Structures C-3-46
47 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-47
48 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development C-3-48
49 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Applied Hydrology Applied Hydrology the California Culverts Practice (1942) Applied Hydrology C-3-49
50 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Design of Small Canal Structures Design of Small Canal Structures C-3-50
51 Development Scheme of the Phlai Chumpon Operation and Maintenance Project, Phitsanulok Province: A Project of the Royal Irrigation Department, 2010 Design Criteria C2/0835 Chapter 2 Design Criteria for Irrigation System Development Design of Small Canal Structures C-3-51
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