Transcript
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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 2/18
1. PILE A
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 3/18
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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 4/18
Calculation for Graph ∆/P against ∆ for Pile A
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 5/18
Graft 1: ∆/P against ∆ for Pile A
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 6/18
'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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 7/18
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. (
$))%(*P
.1<
:11 .43 .3:93 .<; .:4;
41 .0 .9049 .3 .:::;
13 :.9 .9:11 .33 .:;;
;31 :.;< .9;9 :.: .::;;
<9 9.1 .90 :.;4 .:3:0
90 4.1 .94< 9.;4 .:033
<:: 3.<3 .9409 4.0; .93
03 <.1; .9<1 <.9 .9:3;
:1< 0.0 .90;: 1.9: .93:<
:9;9 .<1 .443; ;.; .44
:: .:; .4<11
001 . .3930
<33 ;.19 .301;
491 ;.99 .<4;9
3< 0.<: .1431
;<0 0. .09<0199 1.39 .:19
34 <.1 .999
:0 3.09 .:141
9.;0
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 8/18
Graft 2: ∆/P against ∆ for Pile B
'stimation of ltimate =oad$ u sing *irst Cycle +esult
Equation from graft, y .9:9% 2 .::0<
5lope of the plot, m .9:9 &6-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
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-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
ltimate Capacity of the pile$ ult /.:03 &6-
3,50.77 kN
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 9/18
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
0 0.48 0 Minus Residual
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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 10/18
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-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
ltimate Capacity of the pile$ ult /.;< &6-
5,102.04 kN
'stimation of u sing 8inus +esidual +esult
'quation from graft, y .1% 2 .:43
5lope of the plot, m .1 &6-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
ltimate Capacity of the pile$ ult /.1 &6-
,547.01 kN
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 11/18
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
0 5.88 0 Minus Residual
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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 12/18
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 .;;
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 13/18
5lope of the plot, m .:14 &6-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
ltimate Capacity of the pile$ ult /.:14 &6-
3,49.4 kN
'stimation of u sing 8inus +esidual +esult
'quation from graft, y .3<% 2 .14
5lope of the plot, m .3< &6-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
ltimate Capacity of the pile$ ult /.3< &6-
,410.2 kNPILE E
Table $: Calculation for Minus esi!ual Graft ∆/P against ∆ for Pile %#
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 14/18
Graft $: ∆/P
against ∆
for Pile %
1st Cycle
TotalLoad,P(Tons)
Avsett. ∆(mm)
∆/P
0 0 0
724 0.43
0.00059
4
984 0.69
0.00070
1
1496 1.24
0.00082
9
2014 1.92
0.00095
3
2506 2.55
0.00101
8
2984 3.25
0.00108
9
3491 3.89
0.00111
4
4013 4.60.00114
6
4511 5.34
0.00118
4
5222 6.57
0.00125
8
3835 5.5
0.00143
4
2957 4.28
0.00144
7
1723 3.61
0.00209
5
0 2.42 0 Minus Residual
2nd CycleSett. ∆(mm)
∆/P
0 2.42 2.42 0 0
1366 3.37 3.37 0.95
0.0006
95
2618 4.54 4.54 2.12
0.0008
10
3765 5.65 5.65 3.23
0.0008
58
5031 6.93 6.93 4.51
0.0008
96
6286 8.54 8.54 6.12
0.0009
74
7444 10.58 10.58 8.16
0.0010
96
8751 13.64 13.64 11.22
0.0012
82
9975 18.31 18.31 15.89
0.0015
93
11056 106.46 106.46 104.04
0.0094
10
9664 105.72 105.72 103.30.0106
89
6566 103.48 103.48 101.06
0.0153
91
3581 100.21 100.21 97.79
0.0273
08
0 94.04 94.04 91.62
0.0000
00
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 15/18
'stimation of ltimate =oad$ u sing *irst Cycle +esult
'quation from graft, y .% 2 .<03
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-
10,000 kN
'stimation of ltimate =oad$ u sing 8inus +esidual +esult
'quation from graft, y .03% 2 .413
5lope of the plot, m .03 &6-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 16/18
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
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 17/18
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 '
'stimation of ltimate =oad$ u sing *irst Cycle +esult
'quation from graft, y .:<% 2 .10
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-
7,93.51 kN
7/23/2019 Chin's Method
http://slidepdf.com/reader/full/chins-method 18/18
'stimation of ltimate =oad$ u sing 8inus +esidual +esult
'quation from graft, y .4<% 2 .;
5lope of the plot, m .4< &6-
7now that the in!erse slope of the plot gi!es the ultimate capacity$ thus
ltimate Capacity of the pile$ ult /.4<&6-
,49.32 kN
top related