Nghiên cứu thiết kế và chế tạo thiết bị công nghệ thi công đúc hẫng dầm cầu dây văng bê tông cốt thép

TU tn/dc din nay, thiet bj va cdng nghp thi edng due hing dim ciu dSy vSng bd tdng cot thep a nudc ta diu do cac NhS thiu nudc ngoai dam nhpn vS cd giS thSnh cao.. BSi bSo dS di eSp din

NGHIEN CCOJ THIET KE VA CHE TAO

DAM CAU DAY VANG BE TONG COT THEP

PGS.TS Nguyen Phi Lan

Khoa XSy dt/ng Ciu dudng Trudng Dai hge XSy dt/ng

KS Nguyen VSn Bao

Ting cing ty XSy dt/ng Cdng trinh Glao thdng 1

Tdm tat: Ciu dSy vSng hidn nay dang duge sd dt/ng rpng rai tren thi gidi TU tn/dc

din nay, thiet bj va cdng nghp thi edng due hing dim ciu dSy vSng bd tdng cot thep a nudc ta diu do cac NhS thiu nudc ngoai dam nhpn vS cd giS thSnh cao BSi bSo dS di eSp din vipe nghidn cdu ky thupt, thiit ki vS chi tao thiit bi edng nghp thi cing due hing dim eiu dSy vSng bd tdng cot thdp vS Sp dung tai cdng trinh ciu dSy vSng Rach Mieu (Tiin Giang, Bin Tre)

Summary: Cable-stay bridges are used populariy in the worid Equipment and

technological executing easting of cable-say bridge beam in Vietnam are supplied

by foreign contmetors with high price The paper presents the technical research, design and manufaetum of technical equipment for executing casting of concrete cable-stay bridge beam in Rachmieu constmction

I M d o A U

C l u ddy vdng Id loai kit c l u mdi cd nhilu uu dilm v l kinh t l - ky thudt nen da nhanh ehdng dupe dp dung d Vidt Nam trong nhiing ndm gan day K l td thdi dilm khanh thdnh cau My Thudn ndm 2000 d i n nay, chdng ta dd liPn tilp xdy dung thdnh edng cdc c l u ddy vdng DakYong, eau Sdng Hdn, eau Kiln, cau Binh, c l u Bdi Chdy vd hien dang trien khai cae dif an cau Can Tho, cdu Rach Mieu

Tuy nhidn do cd cdng nghd thi cdng phdc tap ndn hau h i t cac cdng trinh cau ddy vdng da xdy dung d nudc la deu phai can de'n tu vdn vd nhd thdu nude ngodi Vi vdy, viec nghien edu ky

thudt, thiel bj cPng nghe nhim tdng budc l i l n tdi Idm chd edng nghe thi cong c l u ddy vdng d Viet Nam la mpt vdn de cdp thilt va Id mpt trong nhdng hudng uu tien cda ngdnh giao thdng

0 nudc ta, edu day vdng dau fien dupc xdy dung vdo ndm 1976 tai Dak'rong (Quing Tri) Trong giai doan vda qua, cung vdi sif phdt trien vd hpi nhdp cua nhieu ngdnh kinh t l , ngdnh eau dudng nudc nhd cung cd nhdng budc phdt triln dang khich Id, trong dd cau ddy vdng dupc ddc biet quan tdm nhu Id mpt giai phdp hpp ly vdl cac c l u nhjp Idn vupt qua cac con sdng rpng Mdt

sd cau da vd dang dupc thi cdng tai Viet Nam nhu cau My Thudn (VTnh Long), cau Kien, elu Binh (Hai Phdng), cau Bai Chdy (Quang Ninh), cau Can Tho (Vinh Long), edu Nhdt Tdn (Hd Npi)

54 TAP CHf KHOA HOC C O N G N G H $ XAY DUNG Sd05 - 6/2009

Td trudc din nay, thilt bj vd cdng nghp fhl cdng ddc hang dam clu ddy vdng be tdng cdt thep d nudc ta deu do cac nhd thiu nudc ngodi dam nhpn vd ed gid thdnh eao

Xult phdt td cdc nhu elu trPn bdi bdo da Idm rd cdc bude nghiPn edu ky thudt, thilt k l vd ehl tao thilt bj cPng nghp thi cPng due hing dam cau ddy vdng be tdng cdt thep Cae budc triln khai dUpe phdi hpp vdi Ting cdng ty Xdy dung Cdng trinh Giao thdng 1 (Bd Giao thdng Vdn tli (CIENCO 1) vd dupe dp dung tai cdng trinh cau day vdng Rach Midu (Tiln Giang - Bin Tre)

wye TIEU VA NHIEM Vy NGHIEN CUU

- NghiPn eijru ting quan v l ky thudt vd thilt bi cdng nghp thi cdng ddc hang dam clu ddy vdng BTCT dif dng life

- Phdn tich, tuyin chpn, kiln nghj ky thuat vd thief bj cong nghe thi cong dam clu ddy vdng phu hpp vdi dilu kidn Viet Nam ndi chung vd edng trinh clu Rach Mieu ndi ridng

Thilt k l vd ehl tao thief bi thi cdng due hang dam cdu ddy vdng dp dung eho cdu Rach Mieu

2 Gldl THI$U CHUNG VE CAU DAY V A N G RACH Mliu VA CONG NGH$ THI CONG DUC HANG DAM BTCT

2.1 Gidi thieu chung ve clu Rach Miiu

Clu Rach Mieu ble qua sdng Tiln, phia ha luu cda elu My Thudn, nim tren QuIc Ip 60 ndi lien hai tinh Bin Tre vd Hdu Giang Todn dudn eau Rach Mieu gdm hai eau chinh, trong dd clu phia Nam Id clu lidn tue BTCT du dng life, elu phia Ble Id cau ddy vdng

Hinh 2.1 Ciu dSy vSng Rach Mieu

2.2 Cong nghd thi cong due hing dim BTCT clu Rach Miiu

Tnfdc hit can phai nhan manh ring tmdc edng trinh cau ddy vdng Rach Mieu, chdng ta chua thuc hidn vide thilt k l , che fao thilt bi cdng nghp vd triln khai thi cdng thdp cau ddy vdng hipn dai mdt cdch chd dpng, md chi mdi d mdc dp phdi hpp vdi fu van vd nhd thau nudc ngodi vdi td cdch Id nhd thdu phu thifc hipn nhdng cdng vide giln don Vi vdy, sau khi cdng trinh hodn

thdnh nhiJfng bi quylt v l thidt k l , ve edng nghp ehdng ta diu khPng nim dugc cho dd ring d III

ca cdc du an vin vay nudc ngodi chung ta phai ehju mpt khoan tien Idn cho cdng tie ehuyin giao cdng nghd

Hinh 2.2 Bo tri chung eiu dSy vSng Rach Miiu

3 NGHIEN CUU THI^T KE XE DUC THI CONG DUC H A N G DAM CAU DAY V A N G

3.1 Cdc nguyen t i c thiet ke'co ban

- Xe ddc phli d i m b l o k h i ndng ehju life vd I n djnh frong qua trinh thi cdng d l t dim dudi tai trpng eda d l t dam, tai trpng thi cdng vd t l i trpng gio d frudng hpp bat Ipi nhd't

- Xe due phai n i m frong khdng gian cho phep (gida cdc cap ddy vdng, d'ng dan hUdng) frong qud trinh d l bP tdng cung nhu di chuyin xe

- Xe ddc cd c l u fao hpp ly di de ddng vdn chuyin, l i p rdp vd thdo dd, thudn Ipi cho vide

thi cdng ddt dam (di chuyin, dieu ehinh eao dP vdn khudn, l i p dung cdt thep, d l be tdng)

- Vdf lidu cho vide e h l tao xe dde phli de ddng mua d trong nUdc

3.2 Clu tao vd nguyen 1;^ lam viec cua xe ddc thi cong due hing dim c l u diy vdng Rach Midu

3.2.2 Khung chju li/C chinh

Hinh 3.2 Bi tri chung xe due theo phuang dgc du

Khung chiu life chinh Id 2 mdt phing gidn tam giae, gidn cd chieu cao Id 5,4m vd tong chieu ddi Id 22,55m Cdc thanh trong gidn tam gidc ndy co fief dipn hop chd nhdt dupe to hpp td thep ban

o l de ddng vdn chuyin den cPng tmdng, l i p rdp vdo vj trf fhi cong eung nhu thdo dd thilt

bj sau khi thi cdng xong, todn bp cae ehi tiet cda he khung ehju life d i u dugc lien k i t vdi nhau

bing chdt vd bu IPng cUdng dp cao

4^\

Hinh 3.3 Bi tri xe due theo phuang ngang ciu (mpt dt diu xe)

Hinh 3.4 Bi tri xe due theo phuang ngang ciu (mSt dt tai cum di chuyin tnrdc)

TAP CHf KHOA HOC C O N G N G H $ XAY DUNG sd 05-6/2009 57

Hinh 3.5 Bo tri xe due theo phuang ngang du (mSt dt dudi xe)

3.2.3 Hp vin khudn

HP vdn khudn gdm: He van khuPn trong, hd van khudn ngodi, khung xuong vdn khudn, cdc lidn kit

1 yy (\ct^

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r\.^

) Hinh 3.6 So hga bi tri vSn khudn theo phuang ngang ciu

Hinh 3.7 Bi tri vSn khuin tmng theo phuang dgc du

3.2.4 Hp thdng di chuyen

Cung gilng nhU cdc xe due khdc, xe ddc dam eau Rach Mieu di chuyin bing banh xe vd

hp thing kich thuy life

HP di chuyin xe due gdm co; hd thing kieh thdy life d l y xe, he d i m ray, he bdnh trudc,

hd bdnh sau, hp thanh khda cdng ddu xe vd he quang treo

" 1 ^ ^ ^ 1 ^ ^ ^

Hinh 3.8 Hp thing kich thuf lire di chuyin xe due

Hinh 3.9 Ci/m bSnh sau tmng trudng hgp di chuyin xe due

3.2.5 Trinh tUthi cdng mdt dot dim bing xe clue

Budc 1; Di ehuyin xe vdo vj tri

Hinh 3.10 Xe due d vj tri chuin bj di bd tdng Budc 2 Ndng he d i m dpc dd dUdi vd hp ddn van khudn trong, hipu ehinh cao dp

Hinh 3.11 NSng hp gISn vSn khudn ten vj tridibe tdng

Budc 3: L i p ddt cdt thep, neo, cdp, vd van khudn

' » * g I 9!0 1000 '(WO

Hinh 3.12 MSt dt ngang hp van khudn xe giai doan ISp dSt edt thdp

60 TAP CHf KHOA HOC C O N G N G H E XAY DUNG sd 05-6/2009

Budc 4: o l bP tPng dam lan 1

Bude 5: Cdng keo cap dif dng life, ddy vdng lan 2

Bude 6: Thdo van khudn

HInh 3.13 Xe dde ehuin bj di chuyin Budc 7: Chuin bj di chuyin xe dde

Budc 8; Di chuyin xe ddc

Hinh 3.14 Xe due ehuin bj dl chuyin not hSnh trinh 4,5m cdn lai

MPt phdn doan thi cPng du kien thUe hidn trong 13-15 ngdy

3.4 Nguyen t i c va Npl dung tinh todn xe due

3.4.1 Qui trinh tfnh toSn vi thiit ki

K i t c l u vdn khudn leo dupe tinh todn vd thilt ke theo qui trinh 22-TCN272-05 cd tham khao qui trinh thid't k l cdng trinh phu trp

Ngodi ra ndi dung thilt kd vd kilm tra k i t c l u thep cd sd dung cdc tdi lldu hUdng dan tfnh lodn vd thilt k l c l u thdp

TAP CHf KHOA HOC C O N G N G H 6 XAY DUNG sd 05-6/2009 61

4 KET LUAN CHUNG

Trong xu f h l hpi nhap kinh t l qudc t l , cung vdl su phdt triln kinh t l - xd hpi Id sif t i l n bd, phdf friln khdng ngdng cda khoa hpe ky thudt Viec dp dung cae thdnh tuu khoa hpc ky thual vdo san xuat dang la uu lien hdng dau cda mdi qudc gia

Vdi bdi canh thj tnfdng rpng md, cdc doanh nghiep dang ddng tn/dc nhdng dp lUC canh tranh rat Idn Trong bdi canh dd, vide ra ddi nhdng y tudng mdi, tao bao d l duy tri Ipi t h i canh tranh, khuyin khich mpi thdnh vien trong doanh nghipp de xudt sang kiln dp dyng vdo san xult dupe xem la giai phdp tdt nhit trudc nhdng bdi todn kinh t l khd khdn

4.1 Y nghTa ve khoa hoc cong nghe

Vdi kit qua nghien cdu cda de tdi vd triln khai dp dyng thdnh cdng tai cdng trinh elu Rach Mieu da cho chung ta thdy rd ndng IUC tif thdn cda cae nhd chuydn mdn, cac ky su vd cdng nhdn cda cac nhd thau trong nude ed f h l tu gill quylt dupe cae van de phdc tap cda edng nghp hipn dai Thdnh cong eda d l tai da ddnh d i u su trudng thanh vupt bae eua dpi ngu nhdng ngudi Idm c l u d Viet Nam

Sif thdnh cdng cda de tdl eung cho fhly con dUdng friln khai cae y tudng khoa hpc cdng nghd vdo thifc tien Id sif k i t hpp mpt each hdi hPa gida cdc co sd nghien cdu, cdc tn/dng Oai hpc vd cac Doanh nghidp

4.2 Y nghTa t h i ^ t i l n

Cdc s l lieu sau ddy se Idm ro ve tinh kinh te eda vipc tu nghidn cdu, thilt k l vd e h l fao thidt bi thi cdng due hing d i m BTCT elu ddy vdng vd dp dyng tai cdng trinh edu Rach Mieu:

Npi dung

cdng vipc

Thidt kd xe

due d i m

Gfd cda SPECO - Hing

King (USD)

311.450

GIS cda VSL - Thgy Sy(USD)

220 000

6/a binh quSn cda 2 hSng (USD)

265 725

GIS thuc hipn cua di tSi (USD)

14.000

So tiin ISm loi (USD)

251.725

Vdi vipc e h l tao vd triln khai dp dung thdnh cdng 2 bp thilt bj thi cdng ddc hang c l u ddy vdng BTCT tai edng trinh eau Rach Mieu, dpi ngu can bp vd cong nhdn ky thudt tham gia da tn/dng thdnh len nhilu vd tieh luy dupe cdc kinh nghipm thuc t l Ody Id nhdng hat nhdn d l nhdn rpng, p h i biln cdng nghe trPn dipn rpng trong pham vi todn qudc Co sd cdng nghe vd kinh nghidm tich IQy dupc cd f h l triln khai khdng nhdng ddi vdi cac cdng trinh c l u md cd f h l siJ dung cho cdc cdng trinh xdy dung khde cd chilu eao Idn

Kit q u i nghidn cdu cua d l tdi sau khi friln khai dp dung thdnh cdng da dUpc ddnh gia eao O l tdi da dat dupc giii Nhdt cupc thi Tuli tre sang tao ndm 2007 cda Bd Giao thdng Van

t i l vd dat giai Nhi VIFOTEC 2007

Tai lieu tham khao

1 Tidu chudn thilt kd eau 22TCN-272-05, Bp Giao thdng Van tai

2 LP Oinh Tdm, Pham Duy Hod, C l u ddy vSng Nxb Khoa hpc vd ky thudt Hd Npi, 2000

3 Thilt k l ky thudt thi cdng cdu My Thudn -1998

4 Thiet k l ky thupt thi cPng elu Kien - 2000

5 Thiet k l ky thudt thi cdng cau Bai Chdy - 2003

6 M.K.Hurd and ACI Commimtee 347 (2005), Formwortt for Concrete, American Concrete

Institute

7 R.L Peurifoy, G.D Oberiender (1996), Formwork for Concrete Stmctures, McGraw-Hill

Companies, Inc

8 T.V.Love (2001), Construction Manuel: Concrete and Formwork, Craftsman Book Company

9 A.S Hanna (1999), Concrete Formwork Systems, Marcel Dekker, Inc

10 Engineered Formwork System Uses Custom FRP- Government Engineering, March-April

2007, USA

11 Special formwork- K.H.K Scaffolding & Fomiwori< L.L.C - U.A.E

12 Formwork Manuel Complete- SGB Group, U.K

TAP CHf KHOA HCX C O N G N G H $ XAY DUNG Sd05 • 6/2009 63