chin's method

7/23/2019 Chin's Method

http://slidepdf.com/reader/full/chins-method 1/18

Chin’s Method

The Chin’s method required the test pile result of load-settlement relationship. The Chin’s

method just only to plot a graft which the settlement (∆) / load () against settlement (∆).

Then the ultimate loads are deri!ing from the in!erse slopes of the lines. Chin’s method

assumes the form of the load or deformation cur!e is hyper"olic and it is an empirical

method. #t is useful in that if the result is plotted at the time of the test$ de!iation from the

e%pected cur!e is easily seen and the test procedure can "e chec&ed



1. PILE A



Table 1:

1st Cycle

Total Load,P

(Tons)

Ave.Sett, ∆(mm)

∆/P

0 0 0

690 0.37

0.00053

6

1323 0.980.00074

1

1975 1.72

0.00087

1

2755 2.75

0.00099

8

2006 2.49

0.00124

1

1191 2.04

0.00171

3

721 1.47

0.00203

90 0.95 0 Minus Residual

2nd CycleSett.(mm)

∆/P

0 0.95 0 0 0

741 1.3

0.00175

4 0.35

0.00047

2

1368 1.82 0.00133 0.87

0.00063

6

2056 2.39

0.00116

2 1.44 0.0007

2710 2.970.00109

6 2.020.00074

5

3409 4.02

0.00117

9 3.07

0.00090

1

4050 5.38

0.00132

8 4.43

0.00109

4

4750 7.03 0.00148 6.08 0.00128

5365 8.78

0.00163

7 7.83

0.00145

9

6310 10.78

0.00170

8 9.83

0.00155

8

6761 14.730.00217

9 13.780.00203

8

6119 14.44 0.00236

5427 14.08

0.00259

4

4555 13.36

0.00293

3

4059 13.03 0.00321

3330 12.26

0.00368

2

2632 11.59

0.00440

3

1993 10.91

0.00547

4

1402 10.23

0.00729

7

795 9.27 0.01166

0 8.03 0



Calculation for Graph ∆/P against ∆ for Pile A



Graft 1: ∆/P against ∆ for Pile A



'stimation of u sing *irst Cycle +esult

'quation from graph, y .01% 2 .34

5lope of the plot, m .01 &6-

7now that the in!erse slope of the plot gi!es the ultimate capacity$ thusltimate Capacity of the pile$ ult /.01 &6-

5,347.59kN

'stimation of u sing 8inus +esidual +esult

'quation from graph, y .% 2 .393

5lope of the plot, m . &6-

7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus

ltimate Capacity of the pile$ ult /. &6-

9,009.01 kN



2. PILE B

Table 2: Calculation for Graft ∆/P against ∆ for Pile B

1st Cy!e

"ot#! Lo#d,

P$"ons%

A&'. sett. ($))%

(*P

:3 .4; .::1;

3 .4; .:;0

<;; :.: .941

;39 :.00 .9::

1:< :.4 .99:

41 :. .440;

:4< .3 .<90

.1< Min+s esid+#!

2nd Cy!e-ett. (

$))%(*P

.1<

:11 .43 .3:93 .<; .:4;

41 .0 .9049 .3 .:::;

13 :.9 .9:11 .33 .:;;

;31 :.;< .9;9 :.: .::;;

<9 9.1 .90 :.;4 .:3:0

90 4.1 .94< 9.;4 .:033

<:: 3.<3 .9409 4.0; .93

03 <.1; .9<1 <.9 .9:3;

:1< 0.0 .90;: 1.9: .93:<

:9;9 .<1 .443; ;.; .44

:: .:; .4<11

001 . .3930

<33 ;.19 .301;

491 ;.99 .<4;9

3< 0.<: .1431

;<0 0. .09<0199 1.39 .:19

34 <.1 .999

:0 3.09 .:141

9.;0



Graft 2: ∆/P against ∆ for Pile B

'stimation of ltimate =oad$ u sing *irst Cycle +esult

Equation from graft, y .9:9% 2 .::0<

5lope of the plot, m .9:9 &6-


ltimate Capacity of the pile$ ult /.9:9 &6-

3,095.9 kN

'stimation of ltimate =oad$ u sing 8inus +esidual +esult

Equation from graft, y .:03% 2 .344

5lope of the plot, m .:03 &6-


ltimate Capacity of the pile$ ult /.:03 &6-

3,50.77 kN



3. Pi!e C

Table 3: Calculation for Graft ∆/P against ∆ for Pile C

1st Cycle

Total

Load,P(Tons)

Av

sett. ∆(mm)

∆/P

0 0 0

2777 2.05

0.0007

38

5082 4.18

0.0008

23

2646 2.82

0.0010

66


2nd Cycle

Sett.

∆(mm)

∆/P

0 0.48 0 0 0

2751 2.4

0.0008

72 1.92

0.00069

8

4071 3.33

0.0008

18 2.85 0.0007

5078 4.18

0.0008

23 3.7

0.00072

9

6243 5.04

0.0008

07 4.56 0.00073

7479 7.230.0009

67 6.750.00090

3

6265 6.6

0.0010

53 6.12

0.00097

7

5105 5.94

0.0011

64 5.46 0.00107

4028 5.29

0.0013

13 4.81

0.00119

4

2785 4.44

0.0015

94 3.96

0.00142

2

1693 3.54

0.0020

91 3.06

0.00180

7

0 1.91 0 1.43 0



Graft 3: ∆/P against ∆ for Pile C

'stimation of u sing *irst Cyle +esult

'quation from graft, y .;<% 2 .4

5lope of the plot, m .;< &6-


ltimate Capacity of the pile$ ult /.;< &6-

5,102.04 kN


'quation from graft, y .1% 2 .:43



ltimate Capacity of the pile$ ult /.1 &6-

,547.01 kN



4. PILE /

Table 4: Calculation for Minus esi!ual Graft ∆/P against ∆ for Pile "#

1st Cycle

Total

Load,P(Tons)

Av

sett. ∆(mm)

∆/P

0 0 0

460 1.01

0.00219

6

839 2.19 0.00261

1283 3.98

0.00310

2

1707 6.65

0.00389

6

2189 10.52

0.00480

6

1577 9.69

0.00614

5

1083 8.78

0.00810

7

527 7.7

0.01461

1


2nd CycleSett.

∆(mm)

∆/P

0 5.88 0 0 0

571 7.26

0.01271

5 1.38

0.00241

7

1090 8.37

0.00767

9 2.49

0.00228

4

1669 9.45

0.00566

2 3.57

0.00213

9

2114 10.72

0.00507

1 4.84

0.00228

9

2636 14.08

0.00534

1 8.2

0.00311

1

3188 19.870.00623

3 13.990.00438

8

3711 26.77

0.00721

4 20.89

0.00562

9

4257 34.77

0.00816

8 28.89

0.00678

6

4801 43.9

0.00914

4 38.02

0.00791

9

5320 55.1

0.01035

7 49.22

0.00925

2

5821 69.88

0.01200

5 64

0.01099

5

4206 67.96

0.01615

8



2702 65.25

0.02414

9

1121 60.99

0.05440

7

0 55.5 0

Graft 4: ∆/P against ∆ for Pile "

'stimation of u sing *irst Cycle +esult,

'quation from graft, y .:14% 2 .;;



5lope of the plot, m .:14 &6-


ltimate Capacity of the pile$ ult /.:14 &6-

3,49.4 kN


'quation from graft, y .3<% 2 .14

5lope of the plot, m .3< &6-


ltimate Capacity of the pile$ ult /.3< &6-

,410.2 kNPILE E

Table $: Calculation for Minus esi!ual Graft ∆/P against ∆ for Pile %#



Graft $: ∆/P

against ∆

for Pile %

1st Cycle

TotalLoad,P(Tons)

Avsett. ∆(mm)

∆/P

0 0 0

724 0.43

0.00059

4

984 0.69

0.00070

1

1496 1.24

0.00082

9

2014 1.92

0.00095

3

2506 2.55

0.00101

8

2984 3.25

0.00108

9

3491 3.89

0.00111

4

4013 4.60.00114

6

4511 5.34

0.00118

4

5222 6.57

0.00125

8

3835 5.5

0.00143

4

2957 4.28

0.00144

7

1723 3.61

0.00209

5


2nd CycleSett. ∆(mm)

∆/P

0 2.42 2.42 0 0

1366 3.37 3.37 0.95

0.0006

95

2618 4.54 4.54 2.12

0.0008

10

3765 5.65 5.65 3.23

0.0008

58

5031 6.93 6.93 4.51

0.0008

96

6286 8.54 8.54 6.12

0.0009

74

7444 10.58 10.58 8.16

0.0010

96

8751 13.64 13.64 11.22

0.0012

82

9975 18.31 18.31 15.89

0.0015

93

11056 106.46 106.46 104.04

0.0094

10

9664 105.72 105.72 103.30.0106

89

6566 103.48 103.48 101.06

0.0153

91

3581 100.21 100.21 97.79

0.0273

08

0 94.04 94.04 91.62

0.0000

00




'quation from graft, y .% 2 .<03

5lope of the plot, m . &6-


ltimate Capacity of the pile$ ult /. &6-

10,000 kN


'quation from graft, y .03% 2 .413



ltimate Capacity of the pile$ ult /.03 &6-

11,74.71 kN

5. PILE

Table &: Calculation for Minus esi!ual Graft ∆/P against ∆ for Pile '#

1st Cycle

TotalLoad,P(Tons)

Avsett. ∆ (mm)

∆/P

0 0

0.00000

0

288 0.59

0.00204

9

613 1.18

0.00192

5

832 1.58

0.00189

9

1008 2.21

0.00219

2

1349 2.75

0.00203

9

1512 3.15

0.00208

3

1649 3.42

0.00207

4

1847 3.89

0.00210

6

2064 5.61

0.00271

8

2323 5.890.00253

6



2613 6.34

0.00242

6

1917 5.74

0.00299

4

1290 4.72

0.00365

9

641 3.58

0.00558

5

0 2.16

0.00000

0Minus Residual

2 nd CycleSett. ∆(mm)

∆/P

0 2.16 2.16 0

0.00000

0

822 3.5 3.5 1.34

0.00163

0

1090 3.78 3.78 1.62

0.00148

6

1497 4.64 4.64 2.48

0.00165

7

2002 5.34 5.34 3.18

0.00158

8

2572 6.32 6.32 4.16

0.00161

7

2737 6.81 6.81 4.65

0.00169

9

2985 7.15 7.15 4.99

0.00167

2

3270 7.8 7.8 5.640.00172

5

3459 8.4 8.4 6.24

0.00180

4

3708 9.14 9.14 6.98

0.00188

2

3952 10.49 10.49 8.33

0.00210

8

4192 11.34 11.34 9.18

0.00219

0

4482 13.32 13.32 11.16

0.00249

0

4737 14.99 14.99 12.83

0.00270

8

4981 17.51 17.51 15.35

0.00308

2

5217 21.29 21.29 19.13

0.00366

7

5463 29.35 29.35 27.19

0.00497

7

5696 38.68 38.68 36.52

0.00641

2

5955 51.83 51.83 49.67

0.00834

1

6237 75.2 75.2 73.04 0.01171



1

4809 73.38 73.38

3206 70.57 70.57

1664 67.13 67.13

0 62.12 62.12

Graft &: ∆/P against ∆ for Pile '


'quation from graft, y .:<% 2 .10

5lope of the plot, m .:< &6-


ltimate Capacity of the pile$ ult /.:< &6-

7,93.51 kN




'quation from graft, y .4<% 2 .;

5lope of the plot, m .4< &6-


ltimate Capacity of the pile$ ult /.4<&6-

,49.32 kN

chin's method

Documents