Tinh Lun
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Sö dông ®êng cong nÐn Ðp cña líp ®Êt nµo? 1 2 3 4 5 6 7 8 ✘ ✘ TRUE TRUE FALSE FALSE ### FALSE ### ### Líp 1 p (kPa) e
Líp 2 p (kPa) e
9
10
11
###
### FALSE
0 1.93
25 1.73
50 1.63
100 1.5
200 1.35
400 1.17
Líp 8 p (kPa)
0 1.20
75 1.1
150 0.9
200 0.81
250 0.76
300 0.73
Líp 9 p (kPa)
Líp 3 p (kPa)
e
e
12
13
###
###
TRUE
0 0.85
150 0.82
225 0.8
300 0.75
375 0.73
0 0.95
100 0.9
150 0.85
200 0.81
250 0.76
300 0.73
0 0.75
200 0.72
300 0.7
400 0.65
500 0.63
600 0.61
Líp 10 p (kPa)
e
e
Líp 4 p (kPa) e
Líp 5 p (kPa) e
Líp 6 p (kPa) e
Líp 7 p (kPa) e
500 0.63
600 0.61
Líp 11 p (kPa)
0 0.75
200 0.72
300 0.7
400 0.65
0 0.85
200 0.82
300 0.8
400 0.75
Líp 12 p (kPa)
0 0.9
50 0.8
100 0.7
150 0.65
Líp 13 p (kPa)
0 0.75
100 0.72
200 0.7
300 0.65
e e e
400 0.63
500 0.61
§êng cong nÐn Ðp
§êng cong nÐn Ðp 0.9
1.9 1.7
0.8
1.3
e
e
1.5 0.7
1.1 0.9
0.6
0.7 0.5
0.5 0
50
100 150 200 250 300 350 400 450 500 550 600
0
50 100 150 200 250 300 350 400 450 500 550 600
p (kPa)
Row 6
Row 9
p (kPa)
Row 12
Row 15
§êng cong nÐn Ðp
Row 21
§êng cong nÐn Ðp
0.8
0.8
0.7
0.7
e
e
Row 18
0.6
0.6
0.5
0.5 0
50 100 150 200 250 300 350 400 450 500 550 600
0
50 100 150 200 250 300 350 400 450 500 550 600
p (kPa)
Row 24
p (kPa)
Row 12
Row 15
Row 18
Row 21
TRUE
3
Thai Nguyen
15.0 m BÒ réng ch©n nÒn ®¾p Níc ngÇm
1.0 m
Dù b¸o ®é lón
TÝnh lón theo ph¬ng ph¸p:
1.5 m
Cs/Cc ratio
s (cm)
k0 dïng
ChiÒu cao nÒn ®¾p
FALSE Dïng kÕt qu¶ t.n xuyªn t.c SPT
0.5 m
ChiÒu cao bÖ ph¶n ¸p
FALSE Dïng kÕt qu¶ t.n xuyªn tÜnh CPTk0 dïng (t©m mãng)0
4.0 m
BÒ réng bÖ ph¶n ¸p
TRUE ✘
87.4
øng suÊt g©y lón (kPa)
FALSE Sö dông E vµ chØ sè nÐn Cc, Cr
Líp
s©u0 SPT CPT M«®un E2 (bar=10 (m) N qc (bar) KPa) 0
Cc
Cr
OCR
KN/m3
1
12.00
15.0
62.0
5.3
2.00
0.50
1.00
16.50
2
30.00
4.1
75.0
13.8
2.74
0.23
2.55
18.00
### 2.0 m
Sö dông m«®un E vµ/hoÆc e-p Err:508
γ
97.7
###
k0 dïng ✘
###
§êng ®¾p ### ###
1/ 1.5
ta luy
### ###
TÝnh lón t¹i:
###
t©m ®êng### vai ®êng ●
###
ch©n ®êng ### ### ### ### ### ### ### ###
BiÓu ®å øng suÊt (kPa)
999 ###
1
1
36957.57 ###
-230
92
###
0
0
###
12
12
###
30
30
###
30
30
###
30
30
###
30
30
###
30
30
###
12 30
30
###
10 30
30
###
8 30
30
###
6 30
30
###
4 30
30
###
2 30
30
###
30 28 26 24 22 20 18 16 14
R RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR o oo oo oo oo oo oo oo ooo oo oo oo oo oo oo oo oo oo oo ooo oo oo oo oo oo oo oo oo oo oo ooo oo oo oo oo oo w wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww
6 4 2 -
### R RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o ### w wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww
### ###
chê chót xÝu !!!!!! ......... chê chót xÝu !!!!!! ......... chê chót xÝu !!!!!!
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ###
Cs/Cc ratio
0.2
-1
1
BÒ dµy líp ph©n tè 0.40
®é ®é s©u gi÷a s©u z (m) líp (m) -
.s b¶n th©n
σ'o (kpa)
B2
3
B1+B2
§é s©u ngõng tÜnh lón 30.00
HÖ sè .s K
.s g©y lón
∆σ'z (kpa)
céng
Σσ' (kpa)
Tõ kÕt qu¶ SPT
k0 dïng
15 kcach den berm
0
4.0###
β= 1
Tõ Tõ E vµ ®êng m«®u Tõ Cc; nE Cr nÐn Ðp Err:508
97.7
k0 dïng
0.40 0.80 1.20 1.60 2.00 2.40 2.80 3.20 3.60 4.00 4.40 4.80 5.20 5.60 6.00 6.40 6.80 7.20 7.60 8.00 8.40 8.80 9.20 9.60 10.00 10.40 10.80 11.20 11.60 12.00 12.40 12.80
0.20
3.30
0.074
6.48
9.78
Err:508
0.49
Err:508
0.60
9.90
0.116
10.11
20.01
Err:508
0.76
Err:508
1.00
16.50
0.155
13.54
30.04
Err:508
1.02
Err:508
1.40
19.10
0.191
16.68
35.78
Err:508
1.26
Err:508
1.80
21.70
0.223
19.47
41.17
Err:508
1.47
Err:508
2.20
24.30
0.251
21.91
46.21
Err:508
1.65
Err:508
2.60
26.90
0.275
24.01
50.91
Err:508
1.81
Err:508
3.00
29.50
0.295
25.80
55.30
Err:508
1.95
Err:508
3.40
32.10
0.312
27.31
59.41
Err:508
2.06
Err:508
3.80
34.70
0.327
28.58
63.28
Err:508
2.16
Err:508
4.20
37.30
0.339
29.65
66.95
Err:508
2.24
Err:508
4.60
39.90
0.349
30.53
70.43
Err:508
2.30
Err:508
5.00
42.50
0.358
31.27
73.77
Err:508
2.36
Err:508
5.40
45.10
0.365
31.87
76.97
Err:508
2.40
Err:508
5.80
47.70
0.370
32.35
80.05
Err:508
2.44
Err:508
6.20
50.30
0.375
32.74
83.04
Err:508
2.47
Err:508
6.60
52.90
0.378
33.04
85.94
Err:508
2.49
Err:508
7.00
55.50
0.381
33.26
88.76
Err:508
2.51
Err:508
7.40
58.10
0.382
33.42
91.52
Err:508
2.52
Err:508
7.80
60.70
0.383
33.51
94.21
Err:508
2.53
Err:508
8.20
63.30
0.384
33.56
96.86
Err:508
2.53
Err:508
8.60
65.90
0.384
33.55
99.45
Err:508
2.53
Err:508
9.00
68.50
0.383
33.51
102.01
Err:508
2.53
Err:508
9.40
71.10
0.382
33.43
104.53
Err:508
2.52
Err:508
9.80
73.70
0.381
33.31
107.01
Err:508
2.51
Err:508
10.20
76.30
0.380
33.17
109.47
Err:508
2.50
Err:508
10.60
78.90
0.378
33.00
111.90
Err:508
2.49
Err:508
11.00
81.50
0.375
32.81
114.31
Err:508
2.48
Err:508
11.40
84.10
0.373
32.60
116.70
Err:508
2.46
Err:508
11.80
86.70
0.370
32.38
119.08
Err:508
2.44
Err:508
12.20
89.60
0.368
32.14
121.74
Err:508
0.93
Err:508
12.60
92.80
0.365
31.88
124.68
Err:508
0.92
Err:508
13.00
96.00
0.362
31.61
127.61
Err:508
0.92
Err:508
13.20 13.60 14.00 14.40 14.80 15.20 15.60 16.00 16.40 16.80 17.20 17.60 18.00 18.40 18.80 19.20 19.60 20.00 20.40 20.80 21.20 21.60 22.00 22.40 22.80 23.20 23.60 24.00 24.40 24.80 25.20 25.60 26.00 26.40 26.80 27.20 27.60 28.00 28.40 28.80
13.40
99.20
0.359
31.34
130.54
Err:508
0.91
Err:508
13.80
102.40
0.355
31.06
133.46
Err:508
0.90
Err:508
14.20
105.60
0.352
30.77
136.37
Err:508
0.89
Err:508
14.60
108.80
0.349
30.47
139.27
Err:508
0.88
Err:508
15.00
112.00
0.345
30.17
142.17
Err:508
0.87
Err:508
15.40
115.20
0.342
29.87
145.07
Err:508
0.87
Err:508
15.80
118.40
0.338
29.57
147.97
Err:508
0.86
Err:508
16.20
121.60
0.335
29.26
150.86
Err:508
0.85
Err:508
16.60
124.80
0.331
28.95
153.75
Err:508
0.84
Err:508
17.00
128.00
0.328
28.64
156.64
Err:508
0.83
Err:508
17.40
131.20
0.324
28.34
159.54
Err:508
0.82
Err:508
17.80
134.40
0.321
28.03
162.43
Err:508
0.81
Err:508
18.20
137.60
0.317
27.73
165.33
Err:508
0.80
Err:508
18.60
140.80
0.314
27.42
168.22
Err:508
0.79
Err:508
19.00
144.00
0.310
27.12
171.12
Err:508
0.79
Err:508
19.40
147.20
0.307
26.82
174.02
Err:508
0.78
Err:508
19.80
150.40
0.303
26.53
176.93
Err:508
0.77
Err:508
20.20
153.60
0.300
26.23
179.83
Err:508
0.76
Err:508
20.60
156.80
0.297
25.94
182.74
Err:508
0.75
Err:508
21.00
160.00
0.294
25.65
185.65
Err:508
0.74
Err:508
21.40
163.20
0.290
25.37
188.57
Err:508
0.74
Err:508
21.80
166.40
0.287
25.09
191.49
Err:508
0.73
Err:508
22.20
169.60
0.284
24.81
194.41
Err:508
0.72
Err:508
22.60
172.80
0.281
24.54
197.34
Err:508
0.71
Err:508
23.00
176.00
0.278
24.27
200.27
Err:508
0.70
Err:508
23.40
179.20
0.275
24.00
203.20
Err:508
0.70
Err:508
23.80
182.40
0.272
23.74
206.14
Err:508
0.69
Err:508
24.20
185.60
0.269
23.48
209.08
Err:508
0.68
Err:508
24.60
188.80
0.266
23.23
212.03
Err:508
0.67
Err:508
25.00
192.00
0.263
22.98
214.98
Err:508
0.67
Err:508
25.40
195.20
0.260
22.73
217.93
Err:508
0.66
Err:508
25.80
198.40
0.257
22.49
220.89
Err:508
0.65
Err:508
26.20
201.60
0.255
22.25
223.85
Err:508
0.64
Err:508
26.60
204.80
0.252
22.01
226.81
Err:508
0.64
Err:508
27.00
208.00
0.249
21.78
229.78
Err:508
0.63
Err:508
27.40
211.20
0.247
21.55
232.75
Err:508
0.62
Err:508
27.80
214.40
0.244
21.33
235.73
Err:508
0.62
Err:508
28.20
217.60
0.241
21.11
238.71
Err:508
0.61
Err:508
28.60
220.80
0.239
20.89
241.69
Err:508
0.61
Err:508
29.00
224.00
0.237
20.67
244.67
Err:508
0.60
Err:508
29.20 29.60 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00
29.40
227.20
0.234
20.46
247.66
Err:508
0.59
Err:508
29.80
230.40
0.232
20.26
250.66
Err:508
0.59
Err:508
30.00
232.00
0.231
20.15
252.15
-
-
#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
-
#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
-
#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
-
#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
-
#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
-
#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
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#DIV/0!
30.00
232.00
0.231
20.15
252.15
-
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#DIV/0!
30.00
232.00
0.231
20.15
252.15
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#DIV/0!
30.00
232.00
0.231
20.15
252.15
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30.00
232.00
0.231
20.15
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30.00
232.00
0.231
20.15
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30.00
232.00
0.231
20.15
252.15
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#DIV/0!
30.00
232.00
0.231
20.15
252.15
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#DIV/0!
30.00
232.00
0.231
20.15
252.15
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#DIV/0!
30.00
232.00
0.231
20.15
252.15
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30.00
232.00
0.231
20.15
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30.00
232.00
0.231
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30.00
232.00
0.231
20.15
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30.00
232.00
0.231
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30.00
232.00
0.231
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30.00
232.00
0.231
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30.00
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30.00
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30.00
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30.00
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30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00
30.00
232.00
0.231
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30.00
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30.00
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30.00
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30.00
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Mãng ph¶i ®Æt trong líp 1 VÝ dô díi ®©y: Mãng ®Æt vµo líp ‚. Mùc níc ngÇm t¹i 1m. Mãng ®Æt s©u 1.3m. Líp 1 dµy 0.5m. Khi ®ã, cÇn biÕn ®æi t¬ng ®¬ng nh sau ®Ó nhËp vµo ch¬ng
M Níc ngÇm
γ = 17
0.5m
Líp
γ = 18
0.5m
Líp
γnn = 22
0.3m
‚ biÕn ®æi
γ1 = 18.54
1.3m Líp
Líp
‚
Líp
ƒ
thµnh Líp
‚
Líp
ƒ
γnn = 22
γ1 = 17 x 0.5 + 18 x 0.5 + 22 x 0.3 1.3 2 18.54 kN/m =
g ®Æt s©u 1.3m. Ó nhËp vµo ch¬ng tr×nh:
MNN
B¹n chØ gâ sè liÖu vµo c¸c « n»m trong viÒn ®á ®èi kh«ng ®îc cut (c¾t) vµ paste (d¸n). ChØ ®îc gâ sè TuyÖt Dù b¸o lón theo kÕt qu¶ thÝ nghiÖm CPT (theo c¸ch tÝnh Schmertmann) chØ phï hîp cho ®Êt c¸t; vµ + NÕu nÒn ®Êt cã líp ®Êt dÝnh kh«ng cã chÊt h÷u c¬, ®é lón cã theo c¸ch tÝnh nµy cã thÓ lín h¬n thùc tÕ; Trong trêng hîp nµy, b¹n cã thÓ t¨ng qc cña ®Êt dÝnh lªn 1.5 lÇn ®Ó cã dù b¸o lón phï hîp h¬n. + Sè liÖu ®Þa chÊt ph¶i ®ñ tíi ®é s©u lín h¬n kho¶ng 4* bÒ réng mãng th× míi cã kÕt qu¶ dù b¸o lón theo CPT. ChØ ®Êt dÝnh míi lµm ®îc thÝ nghiÖm ®Ó cã ®êng cong nÐn Ðp e-p (hay Cc, Cr). Muèn tÝnh lón theo sè liÖu e-p th× ph¶i check vµo « t¬ng øng ë hµng 3 sheet "tn nen ep" Dù b¸o lón theo E vµ chØ sè nÐn Cc, Cr: Víi c¸c líp ®Êt rêi, ch¬ng tr×nh sÏ sö dông m«®un biÕn d¹ng E hi ∑ Víi c¸c líp ®Êt dÝnh, ch¬ng tr×nh sÏ sö dông chØ sè Cc, Cr theo thøc: C. c«ng .log 1 + eoi σ'0 ®Ó cã e0i th× ngêi dïng vÉn ph¶i nhËp sè trong sheet "tn nen ep"
σ'
NÕu ®êng ®¾p th¼ng ®øng (cã têng gi÷ ®Êt), th× gi¸ trÞ taluy (tû sè ®øng/ ngang) nªn ®Æt lµ 0.0000001 Lón theo thêi gian: PhÝa díi vËt liÖu tho¸t níc th¼ng ®øng (bÊc thÊm, cäc c¸t), coi ®é cè kÕt U nh gi¸ trÞ ban ®Çu (tÝnh trong phÇn "Kh«ng vËt liÖu tho¸t níc") VËt liÖu tho¸t níc th¼ng ®øng thêng chØ dïng cho c«ng tr×nh ®êng, v× vËy sheet "Lun theo thoi gian" ®îc viÕt cho ®êng ®¾p
9 4 2 1 2 9 6 T Q R x h Z E
¬n thùc tÕ;
¸o lón theo CPT.
0.0000001
TRUE
Dïng kÕt qu¶ xuyªn SPT Dïng kÕt qu¶ xuyªn CPT Sö dông m«®un E ●
19
Sö dông E vµ nÐn Ðp e-p Sö dông chØ sè Cc, Cr
thÊm
Líp ### ### ### ###
1 2
HÖ sè cè kÕt Cv 1 hi (m) tg cm2/s m2/th¸ng chiÒu ®¬ng ✘ 100 25920 TRUE 0.04 ✘ 0 0.26 TRUE 18 FALSE FALSE
85
TRUE
0
75
Kh«ng vËt liÖu tho¸t níc §é lón cuèi cïng do nÒn ®¾p (cm)
97.67
ChiÒu dµy t¬ng ®¬ng H (m)
18.04
HÖ sè Tv t¬ng ®¬ng
0.010
§é cè kÕt U sau thêi gian chê
11.0%
Kho¶ng c¸ch bÊc(m) 2 BÒ réng bÊc B (cm) 9.5 BÒ dµy bÊc t (cm) 0
§ kÝnh bÊc t® d w (cm) 6.05
§é cè kÕt ngangU r 86% §é cè kÕt tg ®¬ng 88%
Tû sè hÖ sè Cr/Cv 1
§é lón t¹i t (cm) 48.02
###
✘
§êng kÝnh thÊm d e(m) 2.12
§é lón cßn l¹i (cm) 49.64
###
✘
###
✘
###
✘
✘
VËt liÖu tho¸t níc: Cäc c¸t
®êng kÝnh cäc dw (cm) 20 ChiÒu s©u cäc (m) 7.5 ChiÒu cao gia t¶i(m) 0
15
m (hay α) 2.81
ChiÒu s©u bÊc (m) 8.5
Bè trÝ líi tam gi¸c ✘ Kho¶ng c¸ch cäc(m) 3
3 4
HÖ sè Tr ngang 0.69
ChiÒu cao gia t¶i(m) 0
###
s1 s2
§é lón (cm) cßn l¹i 78.56
n = de / dw 35.05
✘
✘
§é lón (cm) t¹i t 19.10
VËt liÖu tho¸t níc: bÊc thÊm Bè trÝ líi tam gi¸c ✘
✘
###
Cv
s3
###
✘
lop
ChiÒu cao gia t¶i thªm 4.6
###
###
46
0
12
0
2
4
§. kÝnh thÊm d e(m) 3.18 n = de / dw 15.9 HÖ sè Tr ngang 0.31
8.5
Thêi gian chê t (th¸ng ) γ ®¾p kN/m3
2
dw de §é cè kÕt tg ®¬ng 74%
m (hay α) 2.03
§é lón t¹i t (cm) 31.58
§é cè kÕt ngangU r 70%
§é lón cßn l¹i (cm) 66.09
Note 1: PVDs (wick-drains) & sand columns (or sand piles): consolidation time may be longer due to smear zone effect. Note 2: Consolidation is 1-D, therefore, it's only appropriate for embankment/ roadway or mat foundation problems (where the load is on a big area, e.g. each way of at least 10 m)
ThÊm 2 biªn:
ThÊm 1 biªn:
c¸t 2H c¸t
c¸t H sÐt
Kho¶ng thêng gÆp cña hÖ sè cè kÕt Cv Sái cuéi cÊp phèi ®Òu C¸t to, c¸t võa, c¸t nhá C¸t bôi, c¸t pha SÐt pha SÐt
Cv (cm2/s) Cv (m2/th¸ng) 106 - 2x108 2.5x108 - 5x1010 s¹ch 102 - 2x106 2.5x104 - 5x108 0.5 - 100 102 - 2.5x104 0.005 - 1 1 - 250 0.0001 - 0.01 0.02 - 2.5
Líp 2 p (kPa) e
9
10
11
###
### FALSE
0 1.93
25 1.73
50 1.63
100 1.5
200 1.35
400 1.17
Líp 8 p (kPa)
0 1.20
75 1.1
150 0.9
200 0.81
250 0.76
300 0.73
Líp 9 p (kPa)
Líp 3 p (kPa)
e
e
12
13
###
###
TRUE
0 0.85
150 0.82
225 0.8
300 0.75
375 0.73
0 0.95
100 0.9
150 0.85
200 0.81
250 0.76
300 0.73
0 0.75
200 0.72
300 0.7
400 0.65
500 0.63
600 0.61
Líp 10 p (kPa)
e
e
Líp 4 p (kPa) e
Líp 5 p (kPa) e
Líp 6 p (kPa) e
Líp 7 p (kPa) e
500 0.63
600 0.61
Líp 11 p (kPa)
0 0.75
200 0.72
300 0.7
400 0.65
0 0.85
200 0.82
300 0.8
400 0.75
Líp 12 p (kPa)
0 0.9
50 0.8
100 0.7
150 0.65
Líp 13 p (kPa)
0 0.75
100 0.72
200 0.7
300 0.65
e e e
400 0.63
500 0.61
§êng cong nÐn Ðp
§êng cong nÐn Ðp 0.9
1.9 1.7
0.8
1.3
e
e
1.5 0.7
1.1 0.9
0.6
0.7 0.5
0.5 0
50
100 150 200 250 300 350 400 450 500 550 600
0
50 100 150 200 250 300 350 400 450 500 550 600
p (kPa)
Row 6
Row 9
p (kPa)
Row 12
Row 15
§êng cong nÐn Ðp
Row 21
§êng cong nÐn Ðp
0.8
0.8
0.7
0.7
e
e
Row 18
0.6
0.6
0.5
0.5 0
50 100 150 200 250 300 350 400 450 500 550 600
0
50 100 150 200 250 300 350 400 450 500 550 600
p (kPa)
Row 24
p (kPa)
Row 12
Row 15
Row 18
Row 21
TRUE
3
Thai Nguyen
15.0 m BÒ réng ch©n nÒn ®¾p Níc ngÇm
1.0 m
Dù b¸o ®é lón
TÝnh lón theo ph¬ng ph¸p:
1.5 m
Cs/Cc ratio
s (cm)
k0 dïng
ChiÒu cao nÒn ®¾p
FALSE Dïng kÕt qu¶ t.n xuyªn t.c SPT
0.5 m
ChiÒu cao bÖ ph¶n ¸p
FALSE Dïng kÕt qu¶ t.n xuyªn tÜnh CPTk0 dïng (t©m mãng)0
4.0 m
BÒ réng bÖ ph¶n ¸p
TRUE ✘
87.4
øng suÊt g©y lón (kPa)
FALSE Sö dông E vµ chØ sè nÐn Cc, Cr
Líp
s©u0 SPT CPT M«®un E2 (bar=10 (m) N qc (bar) KPa) 0
Cc
Cr
OCR
KN/m3
1
12.00
15.0
62.0
5.3
2.00
0.50
1.00
16.50
2
30.00
4.1
75.0
13.8
2.74
0.23
2.55
18.00
### 2.0 m
Sö dông m«®un E vµ/hoÆc e-p Err:508
γ
97.7
###
k0 dïng ✘
###
§êng ®¾p ### ###
1/ 1.5
ta luy
### ###
TÝnh lón t¹i:
###
t©m ®êng### vai ®êng ●
###
ch©n ®êng ### ### ### ### ### ### ### ###
BiÓu ®å øng suÊt (kPa)
999 ###
1
1
36957.57 ###
-230
92
###
0
0
###
12
12
###
30
30
###
30
30
###
30
30
###
30
30
###
30
30
###
12 30
30
###
10 30
30
###
8 30
30
###
6 30
30
###
4 30
30
###
2 30
30
###
30 28 26 24 22 20 18 16 14
R RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR o oo oo oo oo oo oo oo ooo oo oo oo oo oo oo oo oo oo oo ooo oo oo oo oo oo oo oo oo oo oo ooo oo oo oo oo oo w wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww
6 4 2 -
### R RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR RR RR RR RR RR RRR RR RR RR RR RR o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o ### w wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww ww ww ww wwww www ww ww ww wwww
### ###
chê chót xÝu !!!!!! ......... chê chót xÝu !!!!!! ......... chê chót xÝu !!!!!!
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ###
### ### ### ### ### ### ### ### ### ### ### ### ### ###
Cs/Cc ratio
0.2
-1
1
BÒ dµy líp ph©n tè 0.40
®é ®é s©u gi÷a s©u z (m) líp (m) -
.s b¶n th©n
σ'o (kpa)
B2
3
B1+B2
§é s©u ngõng tÜnh lón 30.00
HÖ sè .s K
.s g©y lón
∆σ'z (kpa)
céng
Σσ' (kpa)
Tõ kÕt qu¶ SPT
k0 dïng
15 kcach den berm
0
4.0###
β= 1
Tõ Tõ E vµ ®êng m«®u Tõ Cc; nE Cr nÐn Ðp Err:508
97.7
k0 dïng
0.40 0.80 1.20 1.60 2.00 2.40 2.80 3.20 3.60 4.00 4.40 4.80 5.20 5.60 6.00 6.40 6.80 7.20 7.60 8.00 8.40 8.80 9.20 9.60 10.00 10.40 10.80 11.20 11.60 12.00 12.40 12.80
0.20
3.30
0.074
6.48
9.78
Err:508
0.49
Err:508
0.60
9.90
0.116
10.11
20.01
Err:508
0.76
Err:508
1.00
16.50
0.155
13.54
30.04
Err:508
1.02
Err:508
1.40
19.10
0.191
16.68
35.78
Err:508
1.26
Err:508
1.80
21.70
0.223
19.47
41.17
Err:508
1.47
Err:508
2.20
24.30
0.251
21.91
46.21
Err:508
1.65
Err:508
2.60
26.90
0.275
24.01
50.91
Err:508
1.81
Err:508
3.00
29.50
0.295
25.80
55.30
Err:508
1.95
Err:508
3.40
32.10
0.312
27.31
59.41
Err:508
2.06
Err:508
3.80
34.70
0.327
28.58
63.28
Err:508
2.16
Err:508
4.20
37.30
0.339
29.65
66.95
Err:508
2.24
Err:508
4.60
39.90
0.349
30.53
70.43
Err:508
2.30
Err:508
5.00
42.50
0.358
31.27
73.77
Err:508
2.36
Err:508
5.40
45.10
0.365
31.87
76.97
Err:508
2.40
Err:508
5.80
47.70
0.370
32.35
80.05
Err:508
2.44
Err:508
6.20
50.30
0.375
32.74
83.04
Err:508
2.47
Err:508
6.60
52.90
0.378
33.04
85.94
Err:508
2.49
Err:508
7.00
55.50
0.381
33.26
88.76
Err:508
2.51
Err:508
7.40
58.10
0.382
33.42
91.52
Err:508
2.52
Err:508
7.80
60.70
0.383
33.51
94.21
Err:508
2.53
Err:508
8.20
63.30
0.384
33.56
96.86
Err:508
2.53
Err:508
8.60
65.90
0.384
33.55
99.45
Err:508
2.53
Err:508
9.00
68.50
0.383
33.51
102.01
Err:508
2.53
Err:508
9.40
71.10
0.382
33.43
104.53
Err:508
2.52
Err:508
9.80
73.70
0.381
33.31
107.01
Err:508
2.51
Err:508
10.20
76.30
0.380
33.17
109.47
Err:508
2.50
Err:508
10.60
78.90
0.378
33.00
111.90
Err:508
2.49
Err:508
11.00
81.50
0.375
32.81
114.31
Err:508
2.48
Err:508
11.40
84.10
0.373
32.60
116.70
Err:508
2.46
Err:508
11.80
86.70
0.370
32.38
119.08
Err:508
2.44
Err:508
12.20
89.60
0.368
32.14
121.74
Err:508
0.93
Err:508
12.60
92.80
0.365
31.88
124.68
Err:508
0.92
Err:508
13.00
96.00
0.362
31.61
127.61
Err:508
0.92
Err:508
13.20 13.60 14.00 14.40 14.80 15.20 15.60 16.00 16.40 16.80 17.20 17.60 18.00 18.40 18.80 19.20 19.60 20.00 20.40 20.80 21.20 21.60 22.00 22.40 22.80 23.20 23.60 24.00 24.40 24.80 25.20 25.60 26.00 26.40 26.80 27.20 27.60 28.00 28.40 28.80
13.40
99.20
0.359
31.34
130.54
Err:508
0.91
Err:508
13.80
102.40
0.355
31.06
133.46
Err:508
0.90
Err:508
14.20
105.60
0.352
30.77
136.37
Err:508
0.89
Err:508
14.60
108.80
0.349
30.47
139.27
Err:508
0.88
Err:508
15.00
112.00
0.345
30.17
142.17
Err:508
0.87
Err:508
15.40
115.20
0.342
29.87
145.07
Err:508
0.87
Err:508
15.80
118.40
0.338
29.57
147.97
Err:508
0.86
Err:508
16.20
121.60
0.335
29.26
150.86
Err:508
0.85
Err:508
16.60
124.80
0.331
28.95
153.75
Err:508
0.84
Err:508
17.00
128.00
0.328
28.64
156.64
Err:508
0.83
Err:508
17.40
131.20
0.324
28.34
159.54
Err:508
0.82
Err:508
17.80
134.40
0.321
28.03
162.43
Err:508
0.81
Err:508
18.20
137.60
0.317
27.73
165.33
Err:508
0.80
Err:508
18.60
140.80
0.314
27.42
168.22
Err:508
0.79
Err:508
19.00
144.00
0.310
27.12
171.12
Err:508
0.79
Err:508
19.40
147.20
0.307
26.82
174.02
Err:508
0.78
Err:508
19.80
150.40
0.303
26.53
176.93
Err:508
0.77
Err:508
20.20
153.60
0.300
26.23
179.83
Err:508
0.76
Err:508
20.60
156.80
0.297
25.94
182.74
Err:508
0.75
Err:508
21.00
160.00
0.294
25.65
185.65
Err:508
0.74
Err:508
21.40
163.20
0.290
25.37
188.57
Err:508
0.74
Err:508
21.80
166.40
0.287
25.09
191.49
Err:508
0.73
Err:508
22.20
169.60
0.284
24.81
194.41
Err:508
0.72
Err:508
22.60
172.80
0.281
24.54
197.34
Err:508
0.71
Err:508
23.00
176.00
0.278
24.27
200.27
Err:508
0.70
Err:508
23.40
179.20
0.275
24.00
203.20
Err:508
0.70
Err:508
23.80
182.40
0.272
23.74
206.14
Err:508
0.69
Err:508
24.20
185.60
0.269
23.48
209.08
Err:508
0.68
Err:508
24.60
188.80
0.266
23.23
212.03
Err:508
0.67
Err:508
25.00
192.00
0.263
22.98
214.98
Err:508
0.67
Err:508
25.40
195.20
0.260
22.73
217.93
Err:508
0.66
Err:508
25.80
198.40
0.257
22.49
220.89
Err:508
0.65
Err:508
26.20
201.60
0.255
22.25
223.85
Err:508
0.64
Err:508
26.60
204.80
0.252
22.01
226.81
Err:508
0.64
Err:508
27.00
208.00
0.249
21.78
229.78
Err:508
0.63
Err:508
27.40
211.20
0.247
21.55
232.75
Err:508
0.62
Err:508
27.80
214.40
0.244
21.33
235.73
Err:508
0.62
Err:508
28.20
217.60
0.241
21.11
238.71
Err:508
0.61
Err:508
28.60
220.80
0.239
20.89
241.69
Err:508
0.61
Err:508
29.00
224.00
0.237
20.67
244.67
Err:508
0.60
Err:508
29.20 29.60 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00
29.40
227.20
0.234
20.46
247.66
Err:508
0.59
Err:508
29.80
230.40
0.232
20.26
250.66
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Mãng ph¶i ®Æt trong líp 1 VÝ dô díi ®©y: Mãng ®Æt vµo líp ‚. Mùc níc ngÇm t¹i 1m. Mãng ®Æt s©u 1.3m. Líp 1 dµy 0.5m. Khi ®ã, cÇn biÕn ®æi t¬ng ®¬ng nh sau ®Ó nhËp vµo ch¬ng
M Níc ngÇm
γ = 17
0.5m
Líp
γ = 18
0.5m
Líp
γnn = 22
0.3m
‚ biÕn ®æi
γ1 = 18.54
1.3m Líp
Líp
‚
Líp
ƒ
thµnh Líp
‚
Líp
ƒ
γnn = 22
γ1 = 17 x 0.5 + 18 x 0.5 + 22 x 0.3 1.3 2 18.54 kN/m =
g ®Æt s©u 1.3m. Ó nhËp vµo ch¬ng tr×nh:
MNN
B¹n chØ gâ sè liÖu vµo c¸c « n»m trong viÒn ®á ®èi kh«ng ®îc cut (c¾t) vµ paste (d¸n). ChØ ®îc gâ sè TuyÖt Dù b¸o lón theo kÕt qu¶ thÝ nghiÖm CPT (theo c¸ch tÝnh Schmertmann) chØ phï hîp cho ®Êt c¸t; vµ + NÕu nÒn ®Êt cã líp ®Êt dÝnh kh«ng cã chÊt h÷u c¬, ®é lón cã theo c¸ch tÝnh nµy cã thÓ lín h¬n thùc tÕ; Trong trêng hîp nµy, b¹n cã thÓ t¨ng qc cña ®Êt dÝnh lªn 1.5 lÇn ®Ó cã dù b¸o lón phï hîp h¬n. + Sè liÖu ®Þa chÊt ph¶i ®ñ tíi ®é s©u lín h¬n kho¶ng 4* bÒ réng mãng th× míi cã kÕt qu¶ dù b¸o lón theo CPT. ChØ ®Êt dÝnh míi lµm ®îc thÝ nghiÖm ®Ó cã ®êng cong nÐn Ðp e-p (hay Cc, Cr). Muèn tÝnh lón theo sè liÖu e-p th× ph¶i check vµo « t¬ng øng ë hµng 3 sheet "tn nen ep" Dù b¸o lón theo E vµ chØ sè nÐn Cc, Cr: Víi c¸c líp ®Êt rêi, ch¬ng tr×nh sÏ sö dông m«®un biÕn d¹ng E hi ∑ Víi c¸c líp ®Êt dÝnh, ch¬ng tr×nh sÏ sö dông chØ sè Cc, Cr theo thøc: C. c«ng .log 1 + eoi σ'0 ®Ó cã e0i th× ngêi dïng vÉn ph¶i nhËp sè trong sheet "tn nen ep"
σ'
NÕu ®êng ®¾p th¼ng ®øng (cã têng gi÷ ®Êt), th× gi¸ trÞ taluy (tû sè ®øng/ ngang) nªn ®Æt lµ 0.0000001 Lón theo thêi gian: PhÝa díi vËt liÖu tho¸t níc th¼ng ®øng (bÊc thÊm, cäc c¸t), coi ®é cè kÕt U nh gi¸ trÞ ban ®Çu (tÝnh trong phÇn "Kh«ng vËt liÖu tho¸t níc") VËt liÖu tho¸t níc th¼ng ®øng thêng chØ dïng cho c«ng tr×nh ®êng, v× vËy sheet "Lun theo thoi gian" ®îc viÕt cho ®êng ®¾p
9 4 2 1 2 9 6 T Q R x h Z E
¬n thùc tÕ;
¸o lón theo CPT.
0.0000001
TRUE
Dïng kÕt qu¶ xuyªn SPT Dïng kÕt qu¶ xuyªn CPT Sö dông m«®un E ●
19
Sö dông E vµ nÐn Ðp e-p Sö dông chØ sè Cc, Cr
thÊm
Líp ### ### ### ###
1 2
HÖ sè cè kÕt Cv 1 hi (m) tg cm2/s m2/th¸ng chiÒu ®¬ng ✘ 100 25920 TRUE 0.04 ✘ 0 0.26 TRUE 18 FALSE FALSE
85
TRUE
0
75
Kh«ng vËt liÖu tho¸t níc §é lón cuèi cïng do nÒn ®¾p (cm)
97.67
ChiÒu dµy t¬ng ®¬ng H (m)
18.04
HÖ sè Tv t¬ng ®¬ng
0.010
§é cè kÕt U sau thêi gian chê
11.0%
Kho¶ng c¸ch bÊc(m) 2 BÒ réng bÊc B (cm) 9.5 BÒ dµy bÊc t (cm) 0
§ kÝnh bÊc t® d w (cm) 6.05
§é cè kÕt ngangU r 86% §é cè kÕt tg ®¬ng 88%
Tû sè hÖ sè Cr/Cv 1
§é lón t¹i t (cm) 48.02
###
✘
§êng kÝnh thÊm d e(m) 2.12
§é lón cßn l¹i (cm) 49.64
###
✘
###
✘
###
✘
✘
VËt liÖu tho¸t níc: Cäc c¸t
®êng kÝnh cäc dw (cm) 20 ChiÒu s©u cäc (m) 7.5 ChiÒu cao gia t¶i(m) 0
15
m (hay α) 2.81
ChiÒu s©u bÊc (m) 8.5
Bè trÝ líi tam gi¸c ✘ Kho¶ng c¸ch cäc(m) 3
3 4
HÖ sè Tr ngang 0.69
ChiÒu cao gia t¶i(m) 0
###
s1 s2
§é lón (cm) cßn l¹i 78.56
n = de / dw 35.05
✘
✘
§é lón (cm) t¹i t 19.10
VËt liÖu tho¸t níc: bÊc thÊm Bè trÝ líi tam gi¸c ✘
✘
###
Cv
s3
###
✘
lop
ChiÒu cao gia t¶i thªm 4.6
###
###
46
0
12
0
2
4
§. kÝnh thÊm d e(m) 3.18 n = de / dw 15.9 HÖ sè Tr ngang 0.31
8.5
Thêi gian chê t (th¸ng ) γ ®¾p kN/m3
2
dw de §é cè kÕt tg ®¬ng 74%
m (hay α) 2.03
§é lón t¹i t (cm) 31.58
§é cè kÕt ngangU r 70%
§é lón cßn l¹i (cm) 66.09
Note 1: PVDs (wick-drains) & sand columns (or sand piles): consolidation time may be longer due to smear zone effect. Note 2: Consolidation is 1-D, therefore, it's only appropriate for embankment/ roadway or mat foundation problems (where the load is on a big area, e.g. each way of at least 10 m)
ThÊm 2 biªn:
ThÊm 1 biªn:
c¸t 2H c¸t
c¸t H sÐt
Kho¶ng thêng gÆp cña hÖ sè cè kÕt Cv Sái cuéi cÊp phèi ®Òu C¸t to, c¸t võa, c¸t nhá C¸t bôi, c¸t pha SÐt pha SÐt
Cv (cm2/s) Cv (m2/th¸ng) 106 - 2x108 2.5x108 - 5x1010 s¹ch 102 - 2x106 2.5x104 - 5x108 0.5 - 100 102 - 2.5x104 0.005 - 1 1 - 250 0.0001 - 0.01 0.02 - 2.5
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