Download - Slide.plaxis 3D Tunnel
![Page 1: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/1.jpg)
1
plaxis
3D tunnel
GS. NguyÔn
C«ng
MÉnTS. NguyÔn viÖt TuÊn
PLAXIS FINITE ELEMENT CODES
![Page 2: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/2.jpg)
2
•
C¸c
lo¹i tunen, ®Æc
®iÓm
lµm
viÖc
vµ
yªu
cÇu
tÝnh
to¸n
• NhËn
xÐt
chung
vÒ
MH 3D
•
T¹o lËp
MH 3D
C¸c
b−íc
thùc
hiÖn
Vµo sè liÖu hình häc
TÝnh
to¸n
XuÊt
vµ
xem
kÕt
quả
• KÕt luËn
•
VÝ
dô: NATM, Tunen
tù
chèng
®ì, tunen
®µo trong
khiªn.
Néi
dung
![Page 3: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/3.jpg)
3
•
NATM (New Austrian Tunneling Method): еo
tõng
phÇn,
(®Ønh, th©n, ®¸y), theo
giai
®o¹n, võa
®µo võa
gia
cè
c¸ch
qu·ng
tõng
giai
®o¹n, c¸c
®o¹n ®µo ®−îc
chèng
®ì
t¹m
b»ng
líp
lãt
hay líp
bªt«ng
phun. TH ®Êt
®¸
quanh
hÇm
tèt,
kh«ng
xÐt
tíi
”mÆt
t−¬ng
t¸c
®Êt-vá”
[Interface]
• Tunen
®µo b»ng
m¸y
(TBM) [Tunnel Boring machine]
trong
khiªn
bao
che
di
®éng
(Shield Tunnel); tunen
tiÕt
diÖn
trßn
vµ
cã
thÓ
ë
c¸c
d¹ng kh¸c
tuú
theo
ng−êi
dïng;
• Tunen
tù
chèng
®ì
–
kh«ng
gia
cè
vµ
tunen
cã
chèng
®ì
C¸c
lo¹i PHƯƠNG PH¸P ĐμO tunnel
![Page 4: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/4.jpg)
4
®Æc
®iÓm
lμm viÖc vμ
yªu
cÇu
tÝnh
• Yªu
cÇu
®¸nh
gi¸: æn
®Þnh
®Ønh
vßm, bïng
nÒn, ®iÒu
kiÖn
lµm
viÖc
t¹i g−¬ng
hÇm.
• ĐiÒu kiÖn chÞu lùc
®Ønh
®¸yG−¬ng Hầm
ngang ®¸y
Giếng®ứng
Tunen
cã
vá
chèng
®é
v¸t
cña
TBM
Mçi
®o¹n
èng
1,5m
![Page 5: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/5.jpg)
5
Example
L−íi
biÕn
d¹ng
M«
hình
qu¸
trình ®µo –
sù
co bãp
mÆt
c¾t
![Page 6: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/6.jpg)
6
Mét sè kÕt quẢ
ph©n
tÝchHầm
ngang
–
æn
®Þnh
g−¬ng
tunen
L−íi
biÕn
d¹ng t¹i cuèi
pha
1 L−îng
tăng
chuyÓn
vÞ
cuèipha
2 (do sù
gỉảm AS mÆt) L−îng
tăng
chuyÓn
vÞ
cuèipha
3
(TriÕt
gỉảm phi-c)
Sù
ph¸t
triÓn
ΣMloadAhμm cña CV g−¬ng
tunen
ChuyÓn
vÞ
(m)
Tæ
ng
Mlo
adA
1,0
0.9
0.8
0,7
0,6
0 0,04 0,08 0,12 0,16ChuyÓn
vÞ
(m)
Sù
ph¸t
triÓn
cña
ΣMsfHμm cña HS an toμn g−¬ng
tunen
ChuyÓn
vÞ
(m)
ΣMsf
0 0,1 0,2 0,3 0,4
6
5
4
3
2
1
![Page 7: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/7.jpg)
7
Mét sè kÕt quẢ
ph©n
tÝchHầm
ngang
–
lón
sôt
mÆt
®Êt
khi
®µo tunen
L−íi
biÕn
d¹ng lóc
cuèi
pha
5
M¸ng
lón
lóc
cuèi
pha
5
![Page 8: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/8.jpg)
8
NhËn
xÐt
chung
vÒ
m«
hình
3D
•
Yªu
cÇu
thêi
gian
tÝnh
lín
vµ
tèn
nhiÒu
bé
nhíVÝ
dô: khi
tÝnh
®¬n giản NATM mÊt
30 phót.
•
Nªn
tìm sù
c©n
®èi
giữa ®é
chÝnh
x¸c
(®é
mÞn l−íi) vµ
thêi
gian
tÝnh
•
Yªu
cÇu
ng−êi
sö
dông
phải
kiªn
nhÉn
vµ
hiÓu biÕt
kü
c¸ch
m«
hình
ho¸
bµi
to¸n
•
Cã
khả
năng
m«
pháng
thùc
tÕ
cao
![Page 9: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/9.jpg)
9
Cöa
sæ
3D TUNNEL
![Page 10: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/10.jpg)
10
THANH C¤NG Cô
chÝnh
CñA
3d TUNNEL
kh«ng
cã
drain, well
Giao
tiÕp
ng−êi
dïng
gåm
4 “sub-programs”: input, calculation,
Output, Curves (t−¬ng
tù
c¸c
plaxis
kh¸c);
![Page 11: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/11.jpg)
11
T¹o lËp
m«
HÌNH 3D
–
LËp
c¸c
giai
®o¹n thi
c«ng
vµ
®µo cho
tõng
phÇn
mÆt
c¾t ngang
nhê
[“z-planes”
vµ
“slices”]
L−íi
3Dy
xz
MÆt
c¾t ngang
ph¼ng
L−íi
2D
•Trình tù–T¹o s¬
®å
tiÕt
diÖn
ngang
trong
mÆt
ph¼ng 2D
–Tù
sinh
l−íi
PTHH 2D cña
m«
hinh
nµy
–T¹o chiÒu
thø
3 cho
m«
hinh
[“z-planes”
vµ
“slices”]
![Page 12: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/12.jpg)
12
T¹o lËp
m«
hÌnh
3D
•
“MÆt
ph¼ng”
vµ
“L¸t”
C¸c l¸t
(slices)
MÆt
ph¼ng z (z plan)
MÆt
ph¼ng sauRear plan
MÆt
ph¼ng tr−ícFront plan
z
y
x
![Page 13: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/13.jpg)
13
T¹o lËp
m«
hÌnh
3D
•
NhËp
c¸c
sè
liÖu
®Çu
vµo–
Gièng
nh−
PLAXIS 2D
–
LËp
3D theo
h−íng
z
(lÖnh
míi):
–
Sö
dông
c¸c
phÇn
tö
nªm
15 nót
(Cã
thÓ
so s¸nh
víi
c¸c
phÇn
tö
6 nót
trong
2D)
Slices 15 nót
Dïng
chung
cho
ca 3D Tun
vµ
3D Found.
![Page 14: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/14.jpg)
14
VÝ
dô
Qu¸
trÌnh
®μo NATM(New Austrian Tunneling Method)
![Page 15: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/15.jpg)
15
T¹o lËp
m«
hÌnh
3D
•
TÝnh
to¸n–
ThiÕt
lËp
c¸c giai
®o¹n thi
c«ng
⇒ “Stage Construction”
–
X¸c
®Þnh
c¸c
“l¸t”
hay “mÆt
ph¼ng”.
Trªn
mçi
mÆt/l¸t
cã
thÓ:
•
Thªm/ bít
c¸c
phÇn tö
®Êt vµ
kÕt
cÊu•
Thay
®æi
tÝnh
chÊt
vËt
liÖu•
Thªm/ bít
c¸c
tai
träng•
Sù
co bãp
mÆt
c¾t (Contraction)•
BiÕn d¹ng thÓ
tÝch•
¸p lùc
(n−íc)
–
ThiÕt
lËp
chÕ
®é
hiÓn
thÞ
(Top view option)
–
HiÓn
thÞ
®Çy
®ñ
3D
![Page 16: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/16.jpg)
16
VÝ
dô
14 x 3m
8.5m
10.5m
![Page 17: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/17.jpg)
17
T¹o lËp
m«
hÌnh
3D
•
HiÓn
thÞ
kÕt
quả
–
HiÓn
thÞ
®Çy
®ñ
3D vµ
trong
mÆt
c¾t ngang
2D
–
HiÓn
thÞ
c¸c
phÇn
tö
kÕt
cÊu
–
C¸c
lùa
chän
hinh
häc
tõng
phÇn
(xem
trong
m«
hinh)
![Page 18: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/18.jpg)
18
NhËn
xÐt
•
TÝnh
to¸n
theo
m«
hinh
3D mÊt
nhiÒu
thêi
gian, nh−ng
m«
pháng
thùc
tÕ
chÝnh
x¸c
h¬n.
•
ChØ
khi
thËt
cÇn
thiÕt
míi
sö
dông
tÝnh
theo
3D•
CÇn
chó
ý
tíi
c¸c
khÝa
c¹nh sau:
–
Chän
lùa
c¸c
m«
hình vµ
c¸c
th«ng
sè
cña
®Êt
– Đé mÞn cña l−íi–
C¸c
giai
®o¹n tÝnh
to¸n
(theo
c¸c
giai
®o¹n thi
c«ng)
![Page 19: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/19.jpg)
19
VÝ
dô
1Natm
-
New Austrian Tunneling Method
ChØ
xÐt
Crown vµ
bench
![Page 20: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/20.jpg)
20
ĐÆc
®iÓm: Tunen
®−îc
®µo tõng
phÇn
(®Ønh, thÒm, vßm
ng−îc),
sau
®ã
®µo c¸c
phÇn
kh¸c
kÕ
tiÕp;
Sau
mçi
khoang
®µo, thµnh
tunen
®−îc
gia
cè
t¹m bằng
phun
xi
măng;
Gia
cố
lãt
cuối
cïng
nÕu
®Êt
®¸
xung
quanh
cÇn
gia
cè.
ThÝch
hîp
dïng
trong
®¸, ®¸
mÒm, ®Êt
cøng
hoÆc
sÐt
qu¸
cè
kÕt
VÝ
dô
Natm
-
New Austrian Tunneling Method
![Page 21: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/21.jpg)
21
Ví
dụ•
Phương
pháp
NATM:
•
Sử
dụng
trong
đá, đất cứng
và
sét
quá
cố
kết... (không
có
nước ngầm)
•
Đào
từng
phần (đỉnh, thân, đáy...) tunnel•
Giữa
các
phần
đào
có
khoảng
cách
nhất
định
•
Các
phần
đào
được chống
đỡ
tạm thời bằng lớp
lót
hay lớp
bê
tông
phun
•
Lớp vỏ
tunnel được
thi
công
sau
cùng
![Page 22: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/22.jpg)
22
Ví
dụ
Một vài sơ đồ thi
công
bằng
Phương
pháp
NATM
![Page 23: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/23.jpg)
23
VÝ
dôNatm
-
New Austrian Tunneling Method
ChØ
xÐt
Crown vµ
bench
ĐỉnhThÒm
vòm ng−îc
Phun
xi măng
![Page 24: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/24.jpg)
24
S¥
Đå
HÌNH HỌC -
Ph¹m vi lμm viÖc
![Page 25: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/25.jpg)
25
MÆt
c¾t
![Page 26: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/26.jpg)
26
VËt
liÖu
drag & drop
![Page 27: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/27.jpg)
27
Sinh
l−íi
ph¼ng –
lμm mÞn
![Page 28: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/28.jpg)
28
Sinh
l−íi
3DTriÓn
khai
theo
to¹
®é
z (mÆt
z vµ
slices ) -
qu¸
trình
®µo theo
giai
®o¹n
Tæng
chiÒu
dµi
29m
![Page 29: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/29.jpg)
29
Ứng
suÊt
ban ®Çu
![Page 30: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/30.jpg)
30
calculationXác định cácpha tính toán
stage constructionwindow
![Page 31: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/31.jpg)
31
calculationXác định cácpha tính toán
![Page 32: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/32.jpg)
32
OUTPUT PROGRAM
![Page 33: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/33.jpg)
33
OUTPUT PROGRAM
![Page 34: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/34.jpg)
34
OUTPUT PROGRAM
![Page 35: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/35.jpg)
35
KẾT THÚC
![Page 36: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/36.jpg)
36
Ví
dụ
2Tính
toán
sự ổn
định
tại gương
đào
của
1 tunnel thi
công
bằng
phương
pháp “khiên
đào”
![Page 37: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/37.jpg)
37
Ví
dụ
2Phương
pháp
khoan
TBM có
khiên
cân
bằng
áp
lực
đất
![Page 38: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/38.jpg)
38
Ví
dụ
2
Chuyển dịch
của
đất
trong
quá
trình
khoan
![Page 39: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/39.jpg)
39
Ví
dụ
2
Sơ đồ tính
![Page 40: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/40.jpg)
40
Ví
dụ
2
![Page 41: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/41.jpg)
41
Ví
dụ
2
![Page 42: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/42.jpg)
42
Ví
dụ
2Biểu
đồ
quan
hệ
áp
lực
khiên
–
biến dạng
đất
Hệ
số ổn
định
bề
mặt khiên
![Page 43: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/43.jpg)
43
Ví
dụ
3
TÍNH TOÁN CÁC GIAI ĐOẠN ĐÀO TUNNEL BẰNG PHƯƠNG PHÁP
KHIÊN ĐÀO
![Page 44: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/44.jpg)
44
Ví
dụ
3
![Page 45: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/45.jpg)
45
Ví
dụ
3
![Page 46: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/46.jpg)
46
Ví
dụ
3
Giai
đoạn 1:
![Page 47: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/47.jpg)
47
Ví
dụ
3
ThiÕt
lËp
¸p lùc
n−íc
![Page 48: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/48.jpg)
48
Ví
dụ
3Giai
đoạn 2
![Page 49: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/49.jpg)
49
Ví
dụ
3Giai
đoạn 3
![Page 50: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/50.jpg)
50
Ví
dụ
3
Giai
đoạn 4
![Page 51: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/51.jpg)
51
Ví
dụ
3Giai
đoạn 5
![Page 52: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/52.jpg)
52
Ví
dụ
3
L−íi
biÕn
d¹ng ë
cuèi
giai
®o¹n 5
![Page 53: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/53.jpg)
53
Ví
dụ
3
Vïn
lâm
lón
trªn
m¹t ®Êt
t¹i cuèi giai
®o¹n 5
![Page 54: Slide.plaxis 3D Tunnel](https://reader034.vdocuments.us/reader034/viewer/2022052411/5571f7cf49795991698c0a12/html5/thumbnails/54.jpg)
54