/\
MUC
LUC
Mo
DAU '
' , ,.',
l
l. Trang
rh6i
vdn
dd vl
x6c
lap
dd
tli
nghi€n
cfu 5
2.
Xdc
dinh
pham
vi
bii
todn
ddnh
pij
rti, ti.,4r, ,;._ _j
^n.
h6p
bC
r6ng

cri,
7
Chr-rong
t:
fdruC
queu
, 8
l.l.
Tinh
hinh
xiy
drmg
cdu
dem
hOp
bC
r6ng
dr
img
l.rc
d Vier
Nam 8
1.1.1.
Dang
k€i
cdu
nhip
ddm
hop
BTDt_IL

khric"
""
.
.
-,. ,.

1 { }
I .2.
Do
rirr
cay
cua
let
ciu
crrng
trinh _
l;
1.2.1.
Khdi
nienl
vc!
clO
tin
cAy
cia
ker
cd-u
xriJ,,j+rg.

,

1.3.
Tinh
hinh
nghi€n
crfu
ring
dung
li
rhuyCt
dO
rjn
cay
hong
xay
dung
cOng
trinh
cdu
ren
th6gidi
vi
trong
nudc 16
I
.3.1
.
Tinh
hinh
nghi€n
cfrr

to6n
c6ng
trinh
n Vidt
Nam
1.3.3.
M6r
sd
nhan
dinh
vd
vdn
tld
nghidn
crlu
DTC
ddi
vdi
KCCI
cdu
hidn
nay
""
" "
:to
chudng
2: PHAN
TicH
LUA
cHoN

ludng
ngiu nhi€n
6nh
huong
ddn dO
tin cAy
lim vi€c
'cirakdtcdunhipBTDUL ; 2g
2.1.2. DO
tin cay
d6c
tnnrg cho
khi ndng
ldm
vi€c
cua kdt
cdu nhip
BTDtlL
30
2.2. Ca
s& li thuydt
xdc
sudt sii
dung rrong phAn
tich
DTC ddi
v6i
cdng
trinh cdu i
32

38
2.3.l.
Trudng
hqp hlm
trang thdi
l) him
tuydn tinh 40
2.3.2. Truong
hqp h)m
trang
rhdi li him phi
tuy6n , 41
2.3.3.
X6c d0 tin cAy
bing phrrong ph6p
Monte-Cailo
. 42
2.3.4. Xdc
d0 tin c6y
bing phucrng phdp
h)nh
hoc
, 44
2.3.5.
Tinh todn
chi
sfi d6 tin cAy
tir kdr
qui
tinh

3.2.
Quy
luat
phdn ph6i
x6c sudt cua
kich thu6c
hinh hoc mat
c6t ngang
kdt
cdu nhip di.m hop
bc rdng du
fng lirc 52
\r
3.3.
Quy
luat
phan
ph6i
xric
sudl cria cudng
d6
be rong kdt
cdu nhip
ddm
bC tdng du fng
luc
56
3-4.
Phen
pheii

x6c su{t
cia rinh tii
'
3.5.2. PhAn phdi
x6c sudr
cfia hoar
tai o t0 _ 61
3.5.3. Dac didm
phdn
phdi
xdc
sudt cira hi€u
fng tii trong
n6i chung 61
3.5. X6c dinh tham
sd dac trung cia
c6c dai luong
ngdu nhi€n
dai di€n
.
cho srlc kh5ng
cia kdt cdu nhip tidm
hdp
BTDUL
vir
rlng luc
do tii
fong
gay
ra

dU irg
Uc
67
3.'1.1. Clc nghi0n
crfu
qui
dinh
chi s6 dd tin
cay ffong c6c
ti€u chudn 67
3.1.2. DC
xudt thang
ctidm d5nh
gi6
dO tin cny cria
kdt cdu nhip
ddm
hop bc tong
du ritlg luc

71
chudng4: DANH
crL DO
TIN cAy cHru
udN
vA cHru ciT
ctA
MAT
cAr
NGANc

hinh
hoc
crja
kdt
cdu
nhip
ddm
h6p
bC r6ng
du
rrng
lqc

76
4.2.2.Tinh
to6n
kich
thudc
c&a mdt
c6r
ngang
qui
tldi
7.7
4.3.
Tinh ro6n
ddc
rrung
h)nh
hoc cira

chi
sti dO
tin
cay
theo
tlinh
nghia
cira
Hasofer-Lind
g2
4.4.2.
Xdtc
dinh
ciic
hirm
bidu
di€n
trang
th:ii
chiu
udn vir
chiu
ciit
g4
4.5. Xdc
dinh
dao hdm
ri€ng
theo
cdc

version.1.5 Ag
4,6.l.Gidithi€uchung ' :, '
4.6.2.
Cdu
tric cita phdn
mdm rin
hoc
lrobpCB
ver.l.5
_ gg
4.7.
,4.p
dung phuong
phrlp
Monte-carlo
dd
rinh
to6n
rl0
tin
cdy chiu
udn
vi
chiu
cdLt
cira
kdt cdu
nhip
ddm
hdp

rheo quy
luar
.
phAn
phdi
chudn
4.i.3.fhuar
to6n
rinh
do rin
cAy
cfta
kdr
cdu
nhip
ddm hop
bc rong
dd
-dnglrrctheophuongphi4pMonte-Carlo g4
4.7.4.
Tinh gi6
trih)m
trang
th6i
(lrrong
du
rrf
an toan
G
) 97

dU fng
h.ic
probsoft
version.1.0
gg
4.8.1.
cidi
thi€u
chung
gg
4.8.2.Cfu tnic
cfia
phdn
mdm Probsofr
ver.1.0
100
4.8.3. MOt sd kdt
qui
tinh
toi4n d6 tin
cAy
bing
phdn
mdm
probsoft
ver.1.0

l0l
4.9.
Kiem

cAu Nurp
.
DAM
Hop BE roNG
DufNc
Luc
10e
5.1. Tinh to6n dd
tin ciy cira mOt
sd kdt cdu
nhip ddm
h6p bC t0ng
du fng
luc bang
phdn
mdm
hobPCB
ver.1.5
11
I
5.1.1. Thu thAp vi
x& lf s6li0u

11
I
5.1.2. Nhap
sd lidu vi
tinh to6n d6
tin cey cfra
c6c m6t cit

15
5.2.2. Ki€m
tra d6i chfng
dO rin cay
chiu udn
cira mOr sd
mat cit
ngang
ddm cdu
Tuy€n Nhon
bing
phdn
mdm
probsofr_M
'
ver.1.0
_.117
5.2.3.
Mdrsd nhAn
x6t vii kdt
qui
tinh roen
d6 tin c6y
cira cdu Tuy€n
'
Nhor TP.
Hd Chi Minh
121
5.3.
Nghi0n

bidn
sai dac fiung cho
cutmg
dd chiu k6o cira cdp du fng luc 126
5.3.3.
Kdt
qui
khio s6t dO
nhay
cira
h€
sd
bidn
sai
d+c tnmg cho vi tri
cira c6p
DUL trong mit cit ngang ddm
12'l
5.3.4.
Kdt
qui
khio s6t d0 nhay
cira hd sd bidn sai ddc
trrrng cho kich
thu6c hinh
hoc cia Mit cit ngang ddm
1?9
xfir
ruAN
.

hang thili chiu udn
vi
chiu c6t d6i
vdi mat c6t ngang kdt c,fu
nhip ddm hop bc tdng
du Ling luc
Kdt
qui
xir lf x6c dinh
dac
trung
phan phdi xdc sudt cudng
dO cria b€
tong, kich thudc
hinh hoc mat cit
ngang vi tinh
todn
do
tin
cay cira mot sd kdt c{u
nhip ddm hop bc
tong drr
fng luc & Vict Nam
Phu luc II
:
Phu luc III :
I
\
cAc rf ur0u
srlnuNc rnoNc r,u4N AN

dd ldch chudn cfra srlc khdng
dO l0ch chudn cira fng luc do tii trong
gdy
ra
h€ sd bidn sai cria srlc khdng
h0
sei bidn sai cira ring
luc
do tiLi trong
gAy
ra
hd
sd tuong
quan
kj hi€u kdt
qui
cta
miu
thri
ld
hlm
phAn
phdi
x6c sulit
ld
tap hgp
meu
h)m
phdn phdi
xdc

vR
v.
p
E
Po
a
F(x)
fln
Fx
E(X)
dx
ox
Dinh nghia
6 trang
sd
t3
t3
.i3
zo.
20
20
20
20
20
20
20
32
32
32
32

han
(him
gi6i
han)
mi6n
c6 thd
x6y ra srr cd
c6c
gii4
tri ng6u nhi€n cira ring luc
do tei trong
gay
ra vi cuimg d0 cia
kdt cdu cOng trinh
Gi6 tri ngdu nhi€n
cita lrrcmg du trfi
an todn
gi6
tri trung
binh cira ludng du trfr
an toen
dd ldch chudn
cira luong drr trtr an todn
narn mai
do
phanphdi
x6c sudt cria
srlc kh6ng cira
kdt cAu cdng
trinh

hod
phan phdi
xdc sual cira sLic
khring R
c6c hC s6cia him
gi(tihanG(X1,
Xr,
Xn)
udc lumg
t6t hc'n toa
dQ
cira
didm rhidr kd tren
mit phing gi6i
han
hd,rn mdt dd xdc
sudt
cria lurrng
drr trt an toin
G
sd ludng cdc
phep
thir thdpg kc
sd lucng kdt
qui
thir
md ludng
du tfi an to)n G30
he sd an to)n thidt kd
J3

m
42
42
42
46
xll
Ut
C"
Ro,
R,"
r
gi:i
lri dd tin cAy
gi6
tri
phuong
vi ti€u
chudn voi
sai sd cr
d0 bdn chiu
k6o cfia c6t th6p
d0
ben tieu chudn
cira ceit th6p
h€ sd didu ki€n
llm vidc
he sd an toin
chidu r0ng mdt
cdu
chidu r6ng c6nh

cao tlo4n c0ng
son c6nh
hing
chidu
cao b6n mdt
cdu
phia
b€n
trong hop
chidu cao
vrit tr€n b€n
trong hdp
chi€u
cao srrdn ddm
h6p
chidu cao vdt
dudi bCn trong
hOp
khoing
c6ch
tit trong tam
cdp du
rfug luc
cira bin
mit cdu
ddn m6p
trCn cing
khoiing
c6ch
til trong tam cfp

75
75
75
75
75
75
yp
bl
[nm]
b2
[mmJ
b3
[mm]
b4
[mm]
b5
[mm]
b6
[mm]
b7
[mm]
b8
[mm]
h
[mm]
hl
[mm]
h2
[mm]
h3

c:ich
tit c6t thdp
thrrong
bin ddy ddm ddn
m6p dudi cing cia
mdt c6t irgang
ddm hOp
khoang cdch
theo
phudng
ngang
gita
cdc b5 c6p
du
rlng
lrrc bin mdt
cdu
khoang c6ch
theo
phudng
ngang
gifra
c6c
b6 c|p
dq ring
h1c b?in d6y
ddm
khoAng
cdch
gifra

th6p du rlng
luc
mdduyn
iiln hdi
cira.cdp du fng
lrrc
cudng
dO chiu k6o
r6i thidu cta
cdr rh6p thudng
moduyn ddn
hdi cira cdt rh6p
thudng
momen noi
luc tinh todn
luc
c6t rinh
todn
luc
kdo tinh
todn
tdng mdt mdt
rlng sudt trong
c6p du
rlng lrrc
fng sudt trung
binh trong
c6p du
fng luc
dudng kinh

.
Ec
[MPal
fpu
[MPa]
fu tMPal
Ep
IMPa]
fs
IMPa]
.
Es
IMPa]
Mu
IN.mm]
Q tN]
N
tN]
Deha
IMPa]
fps
IMPa]
Dp
[mm]
T
Npt
Npd
Dt
[mm]
76

bin mdt
cdu
76
Nsd
s6luong thanh
cdt th6p thuong
bin ddy ddm
76
BetaQ hc s0 chi
khri nang bi nLir ch6o
cia be tdng 76
Theta
[d6]
g6c
nghi€ng cira ring suAt
ndn so vdi
rruc cta
76
ddm
NpQ
s6lrrong cdp drr rlng lrrc
chiu cat 76
Alpha
[dQ]
g6c
nghi€ng cira
c6p du ring luc
so v6i hrrdng
76
ngang

giai
doan
theo
c6c
ti€u
chudn tii trong thidt kdkh6c
nhau,
quy
m6 xAy drmg khOng
thdng
nhfit.
Theo
sd li€u ncu trong Nien
gidm
duong bd nim
2002 do Cuc
Drrong
b0
Vict Nam
ban hlnh
[l8],
Vict Nam
c6 khoing 7.879 cdng trinh
cdu
c6c
loai
vdi tdng chidu
ddi ld 223.818m.
'Irong
sd d6, trdn he thdng

nhung
lai chidm 61,127o
vd
sd
h.rong.
Trong
khoing 10 ndm trd lai Cdy, dang kdt cdu nhip cdu BTDUL
khdu d0
l6n
vi trung binh tlang
la
giii ph6p
chir
ydu
trong
xAy
tlLmg ciu nrii
chung
&
ViCt Nam. Tinh d6n
nay, trCn c6c tuydn
qu6c
16 VieJ Nam cri khoring
gdn
600
cdu BTDUL
v6i tting chidu ddi 50.000 m, trong
do
sd luo-ng cdu c6 dang
MCN hinh hop BTDIIL

hodn thidn
hc
thdng kdt cdu
ha tdng
giao
thdng van di Viet Nam. Vd chdt
lrrdng
thidt kd,
thi
cong vd khai thdc
nhtng loai c6ng tdnh niy ctng rdt da dang,
phu
thuOc
vdo
trinh d0 cong
nghc cua nhi thdu
thi cong,
tu
vdn thidt kd, chir ddu trr, don
vi
quin
lj khai
thdc v.v .
Hi€n nay, mot
sd kdt cdu
nhip BTDUL c6 nh0ng ddu hi6u inh hrrong
tdi
ch{t
luong c6ng trinh
ngay sau

ddi
vdi
c6c
kdt
ciiu
nhip BTDUL
hicn
nay mdi xay
drrng
chi
tlrroc
thdng
qua c6c
phuong
phdp kidm
tra chdt
ludng
thi cong
vd nghi€m
thu
theo
c6c
phdong
ph6p
<idn
giAn, kh6ng
thd
phin 6nh
dring d4c
didm

dd
bd sung
hoin
thi0n
h€
thdng
quin li vd khai
th6c
cong
trinh
cdu.
Do
nhidu
ydu t6 ng5u
nhi€n
tdc
dong
tdi
cong trinh
cdu
n€n
vi6c d6nh
gi6
chdt
ludng
lim
vi€c
vi
du b6o
thdi

DTC
'td
tinh
todn
diinh
gi6
khi
nang
chiu
luc
cira
cdrrg rfinh
cdu
th6ng
qua vi0c khio
s6t,
thu
thap
c6c
sd li€u
thdng
k€
nhfrng
ydu t6 li0n
quan lh xu
huong
hi'9n
dai
vd tlem
lai hi€u

'
do tinh chdt
phtlc
tqp cira
cdc
nguy€n
nhin
gAy hrr
h6ng
vi dudc
x6c
dinh
thOng
qua c6c
ddu
hidu hrr
h6ng.
Do c6c
di6n
bidn
kt thuat
phtlc tap cua
c6c
ydu
td
xdc
dinh
vd ci c6c
ydu
khdng

phuong
ph6p tinh
to6n kdt cdu
thdng
thudng
khong
thd xdc
lap
dudc
mo
hinh
t6i du
vd to6n
hoc
ve
vat li
dec
trung
cho su
lem
vice
cira
KCCT
tlrrdi
tr{c tlung
cira
rdt
nhidu
dai luong
beit

_
phan
dch,
d6nh
gid
khi
nang
chiu
luc
khong
su
c6
cria
KCCT
dqa
co s& kdt
qu6
th&
nghi€m,
kidm
tra
thu
rhap
cdc
sd
rieu
thdng
kc
vd
di;

duryc ouv t,,Ar r,; v4^
^ ai
, .rop
quy
lu{t
vd
x6c
sudt
su
cd
c6
t}6.r
Tini
to6n
didu
chinh
chd
tld
khai
th6c
vi
rhdi
han
khai
rh6c
"i,a
fCCn
fhici
ke.
-

xay
dung
ciic
h6
so
DTC
trong
cric
ti€u
chudn
c6ng
vd
hudng
d6n
rinh
to6n
d6nh
gi6
chdf
ldong
cong
rrinh
v.v
ViCc
rlng
dung
li
thuydt
DTC
rrong

.fu
tfOl,
U|l,
l2gi,,
t341,
t401,
144),
t46),
t471,
t481,
t4el,
t5ll,
ts:2l,
ls3l,E+1,
1861,
tSzl;
le0l.
letl.
ls7l.
le8l.
lt0Jl.
lt04l.
ll23l.
lt06l.
lt07l.
til01.
ll;21.
t
u231,t1341,[135]v.v
- -,

BS5400
(Vuong
qudc
Anh); Euro Code
(ci4c
nudc thenh vien
li€n minh
ChAu
Au)
phdn
l6n cric
h€ sd vd tii
trong, vat li€u t16
duoc
qui
tlinh tt
kdt
qui
nghien
crfu
cria
cdc
du
6n, chudng trinh da
dud. c tridn khai thuc
hien t€n
co s&
thu
rhep,
thdng

Nowak
A:S.
[103], t1041, I1231,
Christensen
P. T.,
t861, [87],
Baker M.J.
[87],
Faber
M. H., Sorensen
J.D.
t901,
Frangopol M.
[91],
Peter Tanner
[1061,
Poul
Linneberg Pedersen
[07],
Iffland,
J. S. B.,
[93],
Sherif El-Tawil
[110],
Tarek
N Kudsi
[12],
Vrouwenvelder
A.C.W.M.
[115],

didn
hinh ld: Ti0u
chudn
thidt kd cdu cfing
CHuII 2.05.03-84*
[129];
TiCu
chudn
thrl nghi€m
cdu CHuII
3.06.07-86
[130];
Tidu chudn thi
c0ng cdu cting
CHtr[
3.06.04-91
[31]
v.v HC
s6 di rrong
vi hd sd srlc
khdng trong
ciic
tiOu
chudn
niy
ddu ttrroc
qui
dinh rr) kdr
qui
cira

khoa hoc
cila Nga
thuc
hi6n
tir
ddu thap
kj
80
trd
lai day.
d
Viet
Nam
c6 nhidu
r6c
gii
nhu Nguydn Vin
Ph6 vd tldng
nghidp
t461,
t441,
[48],
[49],
Phan Vdn
Khoi
[34],
Lc Xudn
Huj,nh
t291, [30],
Nguycn

cr4c
KCCT
n6i
chung,
tl6nh
gi6
cdng ngh€ thi cOng
bC t0ng, x6c
dinh ddc tlidm phan phdi
x6c
sudt
cia
bC t0ng
vh brrdc tldu
nghidn cdu x6c
dinh ciic hd
sd
vrrot
tii.
TrOn
co s&
ph6t
tridn cr4c
phrrong phdp phen
tich DTC, ring
dgng c6ng
nghC
tin
hoc vd
x6c tlinh du.c

chiu cdt".
Phddng
hudng
giii
quydt
vdn dd khoa hoc
trong niy ld vi€c
ring
dung lf thuydt
x6c sudt,
lf
thuydt
DTC, cong nghc
tin hoc vd c6c
s6 li€u thuc
td dd nghi€n
crfu m0
hinh
bii
to6n DTC, xay
dmg
phuong
phdp giii
bii to6n
ddnh
gi6
DTC
cria
mat c6t
ngang

vd xir lf cric
sei li€u rhdng
kd. Hon nia,
ngay
ci
khi
c6 dri c6c
sd li6u th6ng
kd, rhi vi€c
ddnh
gi6
chinh x6c DTC
cua dang
k6t
c{u
nhip
ddm h6.p BTDUL y6u
cdu
phai
thuc hien
khdi luong cong
vi€c
rdt
l6n,
ddng
thdi
ddi vdi kdt
cflu nhip ddm
hOp BTDUL
li dang kdt

vi
mrlc tld inh
hu6ng
cira
chring
d6i vdi
DTC
chung
cfia kdt cdu si€u
tinh dang
ddm h6p BTDUL.
Do
d6,
luan
6n
gidi
han vi6c tidp cAn ve phan
tich
DTC cua kdt
cdu nhip
ddm
hop
BTDUL
rh6ng
qua
vi€c
phAn
tich vi
diinh
gi{

ddn
giin),
md
chrra dd cdp duoc tdi vi€c
d6nh
gi6 hC
thdng
chi
sd
DTC cing nhu m6i
quan
he
giila
c6c chi sd DTC
cia cr4c
MCN
trong
toan
he th6ng
kdt
cdu nhip ddm nhu
he thdng ddm
si€u tinh.
Ddi
v6i
kdt cdu
ddm n6i chung, khi ndng
chiu udn vd
chiu cit li hai
dac

BTDUL
phn
hqp
v6i didu ki0n
cta
ViCt
Nam,
sau d6
ph6t
tridn
ddn dd
giii
quydt c6c bai
to6n cdn lai.
3.
Muc ti€u vir cr{c n6i dung,
pharn
vi nghidn
cfu
Muc deu
cira dd tdi li nghiOn
crfu tinh todn
DTC cira kdt ct{u
nhip ddm
hOp BTDUL
theo didu ki€n
crrdng 116 chiu udn vi
chiu c6t vdi nhtrng
n6i dung
v) pham vi nghidn criu cu

ra do tii trong, dAc
fimg
cudng
d6 ciia cdt th6p v.v
x6c dinh h€ sd
bidn sai
gdn
dring
sit dung dd tinh
ro6n
DTC
cia kdt cdu nhip
BTDUL.
- Tham
khio c6c c6ng
trinh nghidn crlu
tr0n thd
gidi
vd linh vu.c
DTC dd
nkidn
nghi
thang didm
d6nh
gi6
DTC
ddi
vdi
kdt cdu
nhip BTDUL.

ddm
hdp
BTDtJL.
-
Tinh
to6n DTC
ciia m0t s0 kdt cdu nhip
ddm hdp BTDUL de xAy
drrng
6 Viet
Nam.
6
- Kh6o
s6t
dQ
nhay
cria c6c BCB ddi
v6i
DTC dd
ddnh
gi6
mrlc dd
6nh
hrr&ng
cria
cr4c
BCB
ddi
v6i DTC chiu u6n cira cira mQt s6 k6t cdu nhip ddm
hop

Nghien
crlu
phan ph6i
x6c sudt cira c6c bidn co trin vi dd xudt
thang
ttidm
ddnh
gi6
DTC cia k6t
cdu nhip ddm hOp BTDLIL.
Chdcrng
4: XSc.dinh
DTC chiu
udn vi
chiu cit cia kdt cdu nhip ddm hOp
STDIJL.
Chudng
5:
Tinh to6n DTC vi khio s6t dd nhay cira mdt s6 BCB ddi v6i
DTC
cira kdt cdu nhip
ddm hdp BTDUL.
4. Phuong
ph6p
nghi€n
cftu
Dd dinh
gi6
DTC cira kdt cdu
nhip ddm

ddng thuat to6n dd
phan
tich
DTC cria kdt
ct'u
nhip ddm hdp BTDUL
v.v ,
d6ng
thdi nghi€n cfu 6nh huorg
phAn
t6n cira c6c
ydu
td ngdu nhi€n ddi
vdi
DTC
chiu
u6n v) ritrg dung kdt
qui
nghidn
crlu
dd d6nh
gi6
DTC ddi vdi
mot
s6
k6t cdu
nhip ddm
hop
BTDTIL de xey dung
6

cdu nhip
c6
MCN
dang hinh
hop BTDUL
dfc tr€n ddn
gi6o
cd dinh, kdt
cdu nhip
BTDUL
ddm ban r6ng,
kdt
cdu nhip BTDTIL ddm bin drc v.v
Ndi dung
cria muc rtiy
phdn
tich dac didm
c61u tao cira m6t
sd dang kdt
cdu
nhip
cdu BTDLIL di duoc xay dung 6 Viet Nam
hicn nay dd ldm co
sd lua
chon
loai hinh kdt cdu nhip BTDttL tinh todn DTC
cta
luan
6n.
I.I.I. DANG xiT c,{u NHIP DAM

da drro. c thi cdng theo
phucrng
.
phdp
hing nhu:
cdu Medway 6 Anh nhip 152m,
cdu Avtozavog 6 M6t-xcd-va
Nga
nhip
148m,
cdu Houston
6
Texas
(M!)
nhip 229m, cdu
Hirosima nhip
236m
vi
cdu Hamana
nhip 240m
6
Nhat BiiLn,
cdu Schotwien
0 Ao,nhip
250m,
cdu
Gateway i!
Australia 260m
(1986);
cdu Ha MOn

khOng
tldi
xfng
(td
md ra).
C6c khcii be rong dfc hing dr,r.c
dd rai ch6
ren
da
gi6o di
dong
(goi
li xe dric). Cic
thao
tdc cong nghd tir khi di chuydn
xe
thlc
h6ng
v)o
vi
tri mdi cho ddn
khi cing k6o xong DUL dudc
goi
le mot
chu
ki
dfc
hdng.
Qud
trinh

kdt cfng
tam thdi kdt cdu nhip v6i tru nham
tlim bio dn
ilinh
chdng
lat
trong sudt
qu6
trinh
thi cong hdng. Doan ddm 6 s6t mfi cria
nhip
bicn
c6 thd drroc
16p
gh6p
hay dfc tai
ch6
tren di
gi5o
cd
dinh.
Sau
khi
thi cdng xong cdc
cdnh hring thi
phii
hqp long rheo trinh tq dud.
c
du
kidn

hqp long
dd ndi cdc
ddm tinh tlinh n6i tr€n vdi nhau thinh
h€ ddm si€u frnh c5
s6 bac sicu
tinh tang ddn sau m6i
ldn hgp long.
Khoing 10 ndm
tr6 lai ddy, hdng
loat cdu BTDUL dric hing dA du.c thidt
k6 xay drrng 6
Vici Nam
gdn
50 cdu v6i khoing hon 9000m
chidu dii.
Chidu ddi kdt cau
nhip chinh cfra cdu BTDUL dfc
h5ng duoc dSnh
gi6
ln
'
kinh
td nhdt trong khoing ti 70
m tldn 150 m. Thuc td c6c cdu
bc tong cdt
th6p
du ung luc licn tuc
dfc hang da du-d. c thidt kd
ve
xay

Nnp oAu
Hop
eE r6Nc
DIJ(NC
LW Tr{I
c6uc
ruro
PHI-]()NC
PHAP DUC
DAY
D4ng
kdt
cdu
nhip
ddm
hdp BTDUL
dric
ddy ln dang
kdt cdu
nhip ddm
hQp
thi
cong
theo
phudng
ph6p
thic
c6c
kh6i ddm tr0n
bd sau

uu
tlidm
nhu: cong
trudng
gon,
tap trung,
t6 chfc
thi c0ng
don
gi6n,
cOng
nghi0p
ho6
cao it Anh
huong
ddn
giao
th6ng
bcn du6i,
ph
hqp
cho
thi
cong
cdu
vuqt
trong
thinh
phd,
noi

ddy
theo chu kj'duo.c
ring dung
c6 hi6u
qui
kinh
tC
d6i
vdi nhring
ciiu c<i chidu
dli nhip
tir 40-80m
Nhmg trong
thrrc td
khdu
do
nhip
tir 40 ddn
60m
li chidu
ddi l! tudng
nhai thuong
dudc thidt
kd
xay
dLmS
[3q1.
Thdi
gian
qua, nginh GTVT

Hiu, cdu Sio
Phong,
ciiu Hir
Nha
v.v
I.I.3. DANG
T6T CAU
NHIP
DAM HOP
BE TONC
DU LNG
LI-IC THI
coNc
eANc cAc
PHUoNG PHAP
KHAC
Ngoii c5c cOng
nghe thi cOng
dam
hdp BTDTIL
theo
phudng
ph6p
thic
hdng,
<hic tldy
theo chu
ki' nhu
trinh biy
6 trcn, 6

din
,
:i$ido
di
dong,
ld loai
hinh cdng ngh€ thi cdng
m6i, budc
ddu d6 duoc
ring dung
thi
cdng 6 Drr 6n cdu Thanh
Tri vi c6c nhip
ddn cdu Bai
Ch6y. Hi€n
nay,
KHCN
GTVT dA hoin thicn
thidt kd cong ngh€
n)y tld nhi
thdu trong
,.
6p
dung
xAy dung cdu
Nam O TP. Di Ndng
vi m6r sd cOng
rrinh khdc.
'.
Theo

ddm, nril bd mat ddm,
dong nddc trong
cdc khoang ddm
v.v
Mu6n
&nh
gi6
duoc mrlc
dd
inh
hu&ng tir nhfrng ddu
hi€u hu h6ng
n6i trdn
ctra c6ng
uinh
khi khai thdc vi
drr b6o thdi han
phuc
vu cira n6 cdn
phii
tidn hdnh
kidm
'
ti"a, d6ntr
gi6
theo
cdc
phuong
ph6p
chdn

tai thiri didm
nhdt
dinh
theo
c6c chi ti€u li tucrng ddt
ra, ngudi ta dua ra kh6i
ni6m DTC dd
so
s6nh.
'
Nhu vay,
c6 thd dinh ngfra DTCcia
KCCT
ld tdp hop cic tinh
thdt cia
d1i
tltdng
thtc hi?n cr.it thtic
ndng cho tnf4c,
bdo todn cdt tham
sd trong thoi
han
khai
thtic, tuong
ing vcri
qui
dinh cfia qui
trinh vd dtdu ki€n
st dung,
btio

tlidu kiOn khai
th6c cfia
KCCT,
md
DTC
c6
thd
rhi
qua c6c tinh chdt hoac khi nang
nhrr: khi
nang
chiu luc,
tinh
b€n lAu
han
khai
th6c hay tudi
tho), khi nang
sira chfra,
khi
nang
duy
tu;
bao
:lf,".'T uuJru'uow
;.'
:.ffig,
kha
nang kidm
tra

thidr kd
cing
nhrr trong
kidm
,
,
.,tra
tl6nh
gid
chllt lugng.
dung
cira c6c td hqp tei trong
vd tAc d6ng
nhu: chiu
udn,
chiu
c6t, chi
'
':.
tliirh
chung, dn dinh cuc
b6, bidn dang,
chiu
chiu
udn,
chiu
c5t, chiu
k6o, dn
m6i, chiu
nrlt vi

DTC c6
m6r
i
nghja quan
trong,
dac
biCr
tlong
giai
rloan ddu nghidn
crlu vi
rlng dung li rhuydr
ndy
trong c6c
nginh
kinh td -
h!
thu4t.
ViCc tap
hqp, hC thcing
cdc khdi
ni6m co
bin cira khoa
hoc
vd
DTC
ld

cdn
thidt, nhim

vd tldi tuong
nghi€n
crfu; Cdc kh6i
ni€m vd
rrang
th6i
cira tldi
tuong;
Cic
khdi
niem vd tinh
ch{r
cfia d6i turng;
Cdc dac
rung cira
DTC.
Trong
ludn
r4n
chi
lua
chon rrich din
m6t sd khdi
ni6m, dinh
nghia v)
rhuat
ngi
cd
ben
,,.n!dt

qu6
trinh
thi6t kq
chd tao,
sii dung v)
,
s&a chfra,
gia
cddng v.v nhAm muc
dich d6m
bio hi€u
qui
cric
'
:'
,
Kdt
cdu
c0ng trinh
(KCCT):
l} su kdt
hqp c6 td
chrlc cdc
bd
phAn
li€n
:kdf
cfra
cOng
trinh xdy dmg, tluoc thidt kd kien cd. vdng

kd tt khi
:,:bitddu
sil dung hodc sau khi srla chta
phuc
hdi hoiLn
to)n chrlc
ning cria cong
::tririh, ddn khi kdt
cdu xudt hi6n trang th6i
gidi
han.

Thdi han khai
thric cdn lai ti thdi han
khai thiic
ten ruc
cta KCCT
ti
thdi
tlidm kidm tra tinh trang ky
thuar cira n6
ddn khi xu{t
hien trang
th6i
gidi
han.
trang
thiii
lam vidc
ddh khi xual hien

khdng
dudc drr tfnh rru6c.
Trang
thdi lhm vi6c
-
li trang th6i cira
dfii trrong,
trong d6
gid
tri cira
tdt
cdc
tham
sd, dac tnmg cho
khi ndng thuc
hien chrlc ning
cho trudc,
thoe man
YOu
cdu
cira ti€u chudn
ky thuat.'
Trang
thdi khOng c6 khri ning
chiu luc - li trang
rh6i
cia rldi tuong,
trong
d6 chi cdn mOt tham
sd dac rrrng cho ndng

tidp c6c
ycu
cdu
thi6r kd de ddt
ra.
TTGH
cudng
d0
(TTGH
cuc
han):
lh trang
thdi sap dd
hoac
6 trang
toin
bQ
KCCT
gap
su cd.
,r,.'."-,,
TTGH
khai
th6c:
lh
m6c mi ndu vuot qua
m6t didu ki6n
nio dd thi
hodc
b0

sd DTC thanh
phdn
tlon 16 cia
KCCT,
'trong
d6
chi
c6
mor dang su cai don
le duy nhdt.
r.hoqc
m6i bO
ph4n
KCCT.
Biin
sri co bin
IBCB):
ln mOt
phdn
rrong
rap hgp cdc
bi6n s6 dAc
trung
,eho
cdc
dai ludng vat l!
mi€u tri cfc
t6c ddng vi
nhfng
inh huong

G
>
0
lI
trang th6i ldm vi6c
an
toin; ndu
G
<
0 lA trang
th6i
.1Am
uie" n
Ong an toln
(l)m
vicc
c6 su cO.
:. .
Chi sd DTC
p:
l) chi
s6 dac trung cho
xiic suAt su cd P'
,
dddc xdc
dinh
nhu
sau:
B
=