B GIAO THNG VN TI
111111411111111B GIAO THNG VN TICC QLXD & CLCTGTS:
/CQLXD-B1V/v: Tham gia kin v TKCS cc hng mc t chc giao thng, m bo
giao thng b sung cho nt giao Trung Ha thuc Tiu d n xy dng nt giao
Trung Ha hon chnh.CNG HO X HI CH NGHA VIT NAMc lp - T do - Hnh
phc
H Ni, ngy thng 4 nm 2015
Knh gi: V K hoch u tCc QLXD & CLCTGT nhn c vn bn s
4265/BGTVT-KHT ngy 06/4/2015 ca V K hoch u t v vic ngh tham gia kin
TKCS cc hng mc t chc giao thng, m bo giao thng b sung cho nt giao
Trung Ha thuc Tiu d n xy dng nt giao Trung Ha hon chnh; km theo H s
thit k c s do Tng cng ty TVTK GTVT-CTCP (TEDI) lp thng 3/2015. Sau
khi nghin cu h s gi km, Cc QLXD & CLCTGT c kin nh sau:I. H s
ngh tham gia kinbao gm: 01 bn Thit k c s; 01bn Ph lc Tng mc u t;II.
kin caCc QLXD & CLCTGT:2.1. V quy m thit k v s ph hp vi quy
hoch ca cu vt Hong Minh Gim: Mt ng hin ti ca ng Hong Minh Gim -
Nguyn Chnh Bm=2x7,5=15,0m. Theo quy hoch GTVT Th H Ni n nm 2030 tm
nhn n nm 2050 ang trnh ph duyt, quy m mt ct ngang ng l B=30m. Vic
thit k cu vt Hong Minh Gim v xn h m rng mt ng cho ph hp vi vic b tr
cu vt, tng chn l cha c trong quy hoch c cp c thm quyn ph duyt. Do ,
ngh Ban QLDA Thng Long tip tc ch o T vn lm vic c th vi cc n v chc
nng ca TP H Ni thng nht v phng n thit k lm c s trin khai cc bc tip
theo, ng quy nh. T vn xut thit k b rng cu Bc=9,0m, b rng ng cn li
mi bn cu B=7,25m (02 ln xe) l ph hp. V ti trng thit k cu, trc ng
Hong Minh Gim - Nguyn Chnh khng phi l trc chnh, lu lng xe ti trng
nng l khng ln, T vn xut ti trng thit k 0,65HL93 tng t cu vt Nguyn
Ch Thanh Kim M v cu vt Lng H thi cng l ph hp, tit kim chi ph v gim
chiu cao kin trc ca cu m bo m quan trong khu vc d n.2.2. V s liu
kho st: Hin t vn cha khoan kho st a cht m vn dng l khoan kho st ca
D n tuyn ng st th s 5 thit k. ngh T vn khn trng khoan kho st theo
quy nh lm c s thit k kt cu mng m, tr, tng chn cho ph hp, m bo kinh
t - k thut, n nh cng trnh lu di, tnh ng tnh Tng mc u t, trnh phi iu
chnh trong giai on tip theo. Yu cu T vn iu tra kho st cng trnh h
tng k thut ngm trong phm vi gii phn cch gia trn ng Trn Duy Hng v va
h ng Hong Minh Gim, Nguyn Chnh; Tnh ton chi ph di di, bo v cc cng
trnh h tng k thut ny (nu c) a vo tng mc u t.2.3. V s cn thit phi u
t: ngh T vn b sung s liu m xe, d bo lu lng ca cc hng i theo quy nh
lm c s thit k cu vt thp, m bo hiu qu u t.2.4. V thit k cu v tng
chn: V s nhp, T vn cha a ra s liu m xe, d bo lu lng, tuy nhin theo
kin ca Cc QLXD & CL CTGT hng t ng Nguyn Chnh r tri v pha ng Trn
Duy Hng l mt trong nhng hng i chnh, thng xuyn xy ra n tc ko di
trong khu vc nt giao. Khi xy dng cu vt thp s ch gii quyt cho hng i
thng Hong Minh Gim Nguyn Chnh. Do , vic thit k cu vt thp vi s nhp
30+45+60+45+30 (m), trong nhp chnh L=60m nh xut ca T vn s m bo thng
thong trong khu vc nt giao di cu v khng nh hng n Tuyn ng st th s 5.
V mt ct ngang cu: T vn thit k mt ct ngang cu dng dm hp thp lin hp
bn mt cu BTCT, tng t nh cu vt Nguyn Ch Thanh Kim M c m quan cng
trnh cao, ph hp vi cnh quan khu vc d n. ngh T vn b sung bn tnh kim
ton kt cu dm, vng, lm c s thit k chiu cao dm hp cho ph hp. V trc
dc: Vn tc thit k trn cu vt Vtk=40km/h; ngh T vn nghin cu gim bn knh
ng cong ng trn cu R=700m (bn knh ng cong ng ti thiu mong mun quy nh
ti Tiu chun TCXDVN 104:2007) gim chiu cao tng chn u cu. T vn xut
chiu cao tnh khng di cu vt phm vi nt giao H=4,75m; ti hai v tr quay
u chiu cao tnh khng H=3,5m l ph hp gim trc dc cu. Cc xe cao (s lng
t) cho php quay u sau v tr tr P2 v P3. Tng chn c chiu cao khng ln,
ti v tr sau m chiu cao tng chn khong H=4m. ngh T vn nghin cu phng n
tng chn c ct hoc tng chn BTCT dng ch L c chi ph xy dng thp hn v thi
cng nhanh hn thay cho phng n tng chn dng hp.2.5. V thit k ng: T vn
kin ngh Eyc=190Mpa p dng chung cho kt cu mt ng phm vi nt giao Hong
Minh Gim - Nguyn Chnh v m rng ng Trn Duy Hng l cha c c s. Phm vi
thi cng xn gii phn cch, xn h trong khu vc th, lu lng giao thng ln;
Vic thi cng kt cu o ng c Eyc v chiu dy ln s lm ko di thi gian thi
cng, tng khi lng o, p nh hng n v sinh mi trng, thot nc, cng trnh
ngm, Cc QLXD & CL CTGT ngh T vn nghin cu gim chiu dy kt cu o ng
lm mi theo cc hng sau:+ Tham kho kt cu o ng lm mi ca cc tuyn ng th
khc c TP H Ni u t xy dng trong thi gian gn y;+ Eyc c th ly theo gi
tr khuyn co ti tiu chun 22TCN211-06, p dng cho ng th chnh khu vc
Eyc=155Mpa. V thit k ng hai bn cu, tng chn, ngh T vn r sot li theo
hng v c bn ch thit k thm chnh trang 5cm BTN trn mt ng hin ti (nu
cn), khng thit k b vnh ci to trc dc hoc ci thin Eyc. ngh T vn kho
st y h thng thot nc trong khu vc d n, lm c s thit k u ni, hon tr h
thng thot nc cho ph hp, khng gy ngp ng trong qu trnh thi cng v khai
thc.2.6. V t chc giao thng: Khu vc nt giao Hong Minh Gim Trn Duy
Hng l khu vc nt giao c lu lng giao thng ln, thng xuyn xy ra n tc do
ng Trn Duy Hng Nguyn Ch Thanh l mt trong nhng trc chnh i vo khu vc
Trung tm; Vic phn lung lu lng sang tuyn ng khc nh ng Cu Giy l khng
kh thi v tuyn ng ny cng ang ro chn thi cng tuyn ng st Nhn ga H Ni.
Ngoi ra trong khu vc cn c trng trung hc Amsterdam. Do , cng tc m bo
giao thng, an ton lao ng trong qu trnh thi cng (xn h m rng ng, ro
chn thi cng tr, tng chn,) l rt kh khn, phc tp. ngh T vn cn nghim tc
xem xt cc phng n m bo giao thng, an ton lao ng trong qu trnh thi
cng, m bo kh thi trong qu trnh thc hin, khng gy ch tc giao thng.
Sau khi hon thnh cu vt thp v tng chn, on tuyn trc cng trng
Armsterdam s b tr gii phn cch gia, xe a n hc sinh quay u ti v tr
ngt gii phn cch c lu lng ln tp trung vo gi cao im, tim n nhiu nguy
c v xung t, mt an ton v ch tc giao thng ti v tr im quay u ny. ngh T
vn cn nhc, nghin cu k phng n t chc giao thng theo ni dung nu trn.
ngh T vn nghin cu s cn thit phi di trm xe but trn ng Nguyn Chnh ra
pha trc phm vi tng chn, trnh gy n tc giao thng trong qu trnh thi
cng v khai thc. ngh T vn nghin cu phng n xn h tng bn knh r phi ti
ng t Hong Minh Gim- Trn Duy Hng gim thiu n tc giao thng trong qu
trnh thi cng.2.7. V phi hp vi UBND TP H Ni:B GTVT u t xy dng cu vt
Hong Minh Gim v xn h m rng ng trn ng Trn Duy Hng theo ngh ca UBND
TP H Ni. Vic thi cng cc hng mc ny tim n nhiu ri ro xy ra n tc ao
giao thng, mt an ton lao ng, an ton giao thng; Tim n ri ro v tin
thi cng do cng tc di di cc cng trnh h tng k thut (c bit l ng in, ng
n nc,) thng din ra chm; Cng tc cp php ro chn thi cng ca cc n v chc
nng TP H Ni thng rt chm. Do trc khi ph duyt TKCS, Cc QLXD & CL
CTGT ngh V KHT tham mu B GTVT c vn bn ngh UBND TP H Ni cam kt h tr
cc ni dung sau: Di di cc cng trnh h tng k thut ngm, trm xe but ng
tin . C n v chc nng trc tip phi hp vi Ban QLDA Thng Long xy dng
phng n iu tit, m bo giao thng trong qu trnh thi cng. Tng cng cnh st
giao thng iu tit giao thng trong qu trnh thi cng cc hng mc nu trn.
Cp php thi cng ro chn kp thi theo ngh ca Nh thu thi cng.Cam kt ca
UBND TP H Ni v cc ni dung nu trn l mt trong nhng iu kin kh thi cho
vic u t xy dng cu vt.2.8. Mt s lu khc: T vn r sot, tnh ton y khi
lng ph tr thi cng (ro chn, bin bo, vng vy cc vn thp, gio), chi ph
iu tit m bo giao thng.Trn c s tnh ton y tng mc u t, trnh phi iu
chnh trong giai on tip theo. Ban QLDA Thng Long lm vic c th vi Nh
ti tr JICA c thng nht b sung cc hng mc nu trn vo phm vi d n trc khi
ph duyt TKCS v Tng mc u t, ng quy nh v qun l u t xy dng.Trn y l mt
s kin gp ca Cc QLXD & CLCTGT v H s TKCS cc hng mc t chc giao
thng, m bo giao thng b sung cho nt giao Trung Ha; ngh V K hoch u t
tng hp, tham mu trnh lnh o B GTVT xem xt, quyt nh./.Ni nhn:- Nh
trn; - TTr.Nguyn Hng Trng ( b/c); - Cc trng ( b/c); - S GTVT H Ni;
- Ban QLDA Thng Long; - TEDI; - Lu: VP, B1.KT.CC TRNGPH CC TRNG
Phan Quc Hiu
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