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LOCK DESIGN

LS

Uncategorised soft

All users are respo

Date By Comments checking their own

sheet carries out a design for WSD Type 1 Thrust Blocks for TEES.

of the calculations here should be read in conjunction with

ote Nr I.1 (Appendix I) of the WUD Pipes & Pipelines Manual

red into the yellow cells in the worksheet THRUST3

Table allows a dozen cases to be analysed at once

ells under the design table are common design parameters

ecord

ate by checked Notes

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s.

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THRUST BLOCK DESIGN THRUST BLOCK TYPE 1 DESIGN for TEES

Thrust3C.XLS

Version & Date

Project Name: Designed by:

Description : Checked by:

Date:

Applicability and principal design parameters

Pipes with OD not greater than DN +5%, eg DI, GRP

Granular soils,

Design Basis Soil+gravity

(Passive-Active) pressure integrated over height of block

Base friction from weight of blockonly.

Weight of pipe ignored

Angle of soil friction 30 degrees OD =OD adopted for calculations

Factor of safety 1.5 Hb =Height of thrust blockoverall

Submerged conditions Dry A =width of thrust blockat pipe

Soil density(non submerged) 17.5 kN/m3 B =width of thrust blockat face

Soil sensity (submerged) 10 kN/m3

Concrete density 23 kN/m3

DATA RESULTS

Test Pipe Dim Design Design BlockDimensions

Main Branch Press Cover A Case OD Thrust Hb A B Volume

mm bar mm mm mm kN mm mm mm m3

600 100 6 1200 1 119 6.6 1000 400 400 0.106

600 250 6 1200 2 274 35.3 1000 550 750 0.289

600 400 6 1200 3 429 86.6 1000 700 1700 1.070

600 600 6 12004 635 190.2 1000 900 3400 3.568

600 600 10 1200 5 635 316.9 1000 900 5300 8.080

600 600 12 1200 6 635 380.3 1000 900 6150 10.684

1200 100 10 1200 7 119 11.1 1600 400 400 0.169

1200 200 10 1200 8 222 38.7 1600 500 500 0.250

1200 250 10 1200 1200 9 274 58.8 1600 1200 1200 0.644

1200 900 10 1200 1200 10 945 701.5 1600 1200 6150 17.121

1200 1200 10 1200 1200 11 1255 1237.0 1600 1200 9750 41.182

1200 1200 12 1200 1200 12 1255 1484.4 1600 1200 11250 54.262

SOIL & GENERAL DATA Suggested Values

Design Basis for Standard design

Angle of soil friction Sdeg 30 deg 30

Factor of safety FS 1.5 1.5

Submerged conditions SB 0 Dry 0=dry 1=submerged

Soil density(non submerged) Ysd 17.5 kN/m3 17.5

Soil sensity (submerged) Yss 10 kN/m3 10

Concrete density Ycd 23 kN/m3 23

Type 1 blockparameters

Dimension d at block d 0.2 m Blockht above/below pipe

Depth of face before taper Lf1 0.2 m

Pipe material (OD calcs)

Diameter of

Standard Thrust Block

Type 1 for Tees

Pipe cover

ODd

d

H/2H/2

Blockcover

SECTION X-X

Ground LevelX

X

B

Face cast againstexcavation

Lf1=200 min

45 A

PLAN

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CALCULATIONS

g 9.806 m/s

2

Design Basis Dbasis 3 Linked to design basis drop down

Design Case case 1

Diameter Branch DNb 0.100 m =INDEX(data,case,2)/1000

Main DNm 0.600 m =INDEX(data,case,1)/1000

Test pressure Pt 6.0 bar =INDEX(data,case,3)

Cover to Pipe Cover 1200 mm =INDEX(data,case,4)

Angle of soil friction AngS 0.5236 rad =Sdeg*PI()/180

Active Ka 0.333 =TAN(PI()/4-AngS/2) 2

Passive Kp 3.000 =TAN(PI()/4+AngS/2) 2

Net Kn 2.667 =Kp-Ka

Base friction Kb 0.577 =TAN(AngS)

Pipe outside diameter

Pipe Material mat 2 linked to pipe material drop down box

OD for calcs OD 0.1188 m =CHOOSE(mat,ODst,ODdi,ODac12,ODac18,ODac24)

Steel/Plastic(OD=DN) ODst 0.1000 m =DNb

DI/GRP ODdi 0.1188 m =DNb*1.0329+0.0155

AC-12 ODac12 0.1131 m =DNb*1.084+0.0047

AC-18 ODac18 0.1155 m =DNb*1.131+0.0024

AC-24 ODac24 0.1200 m =DNb*1.2

Cross sectional area XAB 0.0111 m2 =PI()*OD 2/4

Design thrust Td 6.6 kN =Pt*XAB*100

Dimension A default Ad 0.4 m =DNb+0.3

entered At 0 m =INDEX(data,case,5)/1000

used As 0.4 =IF(ISNUMBER(INDEX(data,case,5)),At,Ad)

Round off to nearest 50 A 0.4 m =ROUND(As*2,1)/2

Effective Soil Density Ys 17.5 kN/m3 =IF(SB=0,Ysd,Yss)

Effective concrete Density Yc 23 kN/m3 =IF(SB=0,Ycd,Ycd-g)

Depth to pipe centre Ds 1.5 m =Cover/1000+DNm/2

Block height Hb 1 m =DNm+2*d

Design Basis Options

Soil pressure only

Gravity only

Soil+gravity

Design for Soil Pressure only(Design Basis 1)

Face length B1x 0.4000 m =MAX(FS*Td/(Kn*Ys*Ds)/Hb,A)

Design with base friction (Design Basis 2 & 3)

Vol of concrete at pipe VolA 0.026 m3 =A*(Hb*DNm/2-PI()*DNm 2/8+DNm*d/2)

Wt water in pipe Ww 1.109032472 kN =IF(SB=0,DNm 2*PI()/4*A*g,0)

Effective base pressure Xpb 23 kN/m2 =Yc*Hb

Pass coeff coeffB XXB11 70 kN/m =IF(Dbasis2,Kn*Ys*Ds*Hb,0)

Wt coeffs coeffB XXB12 2.655811238 kN/m =Kb*Xpb*Lf1

coeffB2 XXB2 3.319764048 kN/m2 =Kb*Xpb/4

coeffB0 XXB01 -0.531162248 kN =-Kb*Xpb/4*A 2

XXB02 0.349146745 kN =Kb*VolA*Yc

Thrust term XXB03 -9.974523445 kN =-Td*FS

Combined coeffs XXB1 10.94291796 m =(XXB11+XXB12)/2/XXB2

XXB0 -3.059415911 m =(XXB01+XXB02+XXB03)/XXB2

Solve for B B2x 0.138908126 m =-XXB1+SQRT(XXB1 2-XXB0)

Select B Bx 0.138908126 m =CHOOSE(Dbasis,B1x,B2x,B2x)

round up B 0.40 m =MAX(ROUND(2*Bx+0.049,1)/2,A)

Volume of Concrete Volf 0.080 m3 =B*Hb*Lf1

Volb 0.000 m3 =(B+A)/2*(B-A)/2*Hb

Volc0.106

m3=VolA+Volb+Volf

180420595.xls.ms_officeTHRUST 3 THRUST3 Printer:10/15/2013