-
Hnh 1: Nguyn l cng ngh c y
-
-Phng php y u tin p dng cu Ager (o) nm 1959. Cu ny c c im l sau
khi c xongcu th mi y 1 ln.-Phng php y c nhiu li th, tuy nhin vicy 1
ln lm gim hiu qu ca cng ngh. V vyn thc y s pht trin cng ngh y c chu
k. in hnh trong giai on ny l cu qua sng Inn (o) nm 1960.-Cng ngh c
y p dng cho cu ng b, ng st; cu thng, cu cong,...
-Cc nc p dng nhiu nht l c, , Php,...
-
Hnh 3: Cu cong Restel bn knh R=150m thi cng theo cng ngh c y
-
Hnh 4: Cu Salmtal (c)
-
Hnh 5: Cu Lockwitztal (c)
-
Hnh 6: Cu Millau cao nht thgii thi cng theo cng ngh y
-
Hnh 7: Cu Hin Lng thi cng theo cng ngh c y ca Nga
-
Gi
t
h
n
h
Chiu di cu
0 100 200 300
- Phng php thi cng c y theo chu k- Phng php thi cng gio vi chiu
cao tr 5m - Phng php thi cng gio vi chiu cao tr 10m - Phng php thi
cng gio vi chiu cao tr 15m
15m 10m
5m
Hnh 8: So snh gi thnh gia cng ngh trn gin gio vi c y
-
-Cng ngh ny p dng cho dm lin tc, c chiucao dm khng i theo chiu
dc cu.
-Chiu di nhp p dng t 30-80m, ti u nht t40-60m. T l gia nhp ngn v
di 0.60-0.75. Nu y t 2 pha th t l c th ly 0.50.
34.40 35.00 35.00 34.4035.0035.00
30.00
i trng
30.00
i trng
Hnh 9: Cu Sampini y t 2 pha nn cho php t l nhp nh hn
-
-Dng hp kn: p dng khi nhp 40m, chiu caodm h = (1/16-1/21)L.
b b b
b 13m 13m b 18m 18m b 25m
Hnh 10: Tit din ngang dng hp kn
-
-Dng hp h kiu Homberg: p dng khi nhp vaphi 30-40m, chiu cao dm h
= (1/13-1/16)L.
Hnh 11: Tit din ngang dng hp h kiu Homberg
-
-Chiu di phn on c c ngha quan trng vnhp , hao ph lao ng,...
-Trc y do nng lc cn thp nn chiu dion c 10m. Ngy nay do my mc hin
i c th ln n 20-30m.
-Khi phn on cn ch n cc v tr chu lc btli nh ti tr v gia nhp.
-
-Cc b cp phi m bo tnh lin tc theo chiudi dm thng qua cc b ni cp.
Cc b ni nynm v tr tip gip cc phn on dm vi slng khng > 1/3-1/2
trn 1 mt ct.
50% 50%
Mi ni tip xc
Hnh 12: Cc i b cp i qua v tr tip gip cc phn on
-
AAMo
A
A Mo
Hng y
Hng y
A
AMo
Hng y
A
-Vic tnh ton b tr cp phi theo trnh t ccbc thi cng:
Hnh 13: Din bin ni lc trong qu trnh thi cng c y
-
Khi hp dm
Tm trut (teflon)
Tr cu
B trut tm thi
Tm thp m crm
Hnh 14: H trt b tr trn tr
-
Thanh neo 32
Nhm gi trut v mt trut
V tr t kch t iu chnh
B phn t bnh t dn hung
Hnh 15: Kt cu dn hngiu chnh lch ngang
-
Tng
Bnh xe quay
Dm ang lao
Thit b trut
Hnh 16: Kt cu dn hng iu chnh lch ngang
-
AB
C
Cmt chnh
2
.
5
1
A
BM
Mt ct c-c4.45
4
.
4
5
chi tit m
30
Mt ct a-a
Mt ct b-b
Hnh 17: Kt cu mi dn
-
L bulng
Mc Neo
Btng
Hnh 18: Lin kt mi dn vi dm
-
Hnh 19: Kt cu tr tm
-
Dm BTCTDL
Tm trut
Hung y
Mi dn
Kch ko
Thanh ko
Thanh neo c nh
Tm trut
Hnh 20: Phng php dng thanh ko
-
Hnh 21: Phng php dng tr lc
Mi dnThanh ko
on dm cKch y
on dm chun b c
B cM cu
Tr lc
i trng bng cc khi btng
-
Cht ko
Dm BTCTDL
Cp ko
Mi dnKch ko
B t bng kt cu thpB t kt cu thp
Kch ko
Hnh 22: Phng php dng cp ko
-
Dm BTCTDL Hung y
Kch y
Kch nng
Tm trut
Hnh 23: Phng php nng y
-
Kch nng h dm
Dm BTCTDL Hung y
Gi
Kch y
Mt trut
Tm c kha rng cua
Hnh 24: Phng php y nng
-
Kch y Dm BTCTDL
Tm trut
Hung y
Mi dn
Kch y
Dm thp c b tr l cht kch
Tm trut
Hnh 25: Phng php y dm trc tip
-
Dm cuHp t di ng
Kch y
Tm trutLin kt bng bulng
Dm trut (ung dn)
Hnh 26: S lin kt gia kch v ng dn
-
Thanh kp
Kch y
Dm cu
Tm trut
Dm trut (ung dn)Kp thu lc
Hnh 27: S lin kt gia kch v ng dn bng kch p ma st
-
Hnh 28: Kch y dm
-
Thank s for Thank s for Your Attention!Your Attention!
