KHOA HQC - C O N G NGHE
Tap Chi GTVT 6/2011
SAT Ld DUCfNG VEN SONG TREN DAT YEU QL.91 OOAN BiNH MY, AN GIANG
Tom tat: Sat Id dudng ven theo sdng Hau d An Giang dang trd nen nghiem trgng. Sat Id xay ra tai km 88+937, QL.91, Binh My vao ngay 22/03/2010 da lam huhong 70 m dudng gay tac nghen giao thong trong nhieu ngay, lam thiet hai 2 can nha, va hon 27 can nha phal dl ddi. Tinh phal lam dudng tam de giai quyet giao thong tam thdi. Tuy nhien, nguyen nhan va cd che gay sat Id vin chua dugc nghien cUu mdt each khoa hgc. Bai bao nay nghien cUu he thdng hoa nguyen nhan va eO che gay sat Id bang mo phong dung hai phan mem Slope/W 2007 va Plaxis v8.5. Ket qua phan tich cho thay tac ddng cua nude mat va nudc ngam, xoi ehan, dia chat yeu, cac hoat dong gia tang cua eon ngudi, va tae dgng thay ddi khi hau la nhUng nhan td cd ban gay ra sat Id.
TUkhoa: On djnh, mai doc, sat 16, xoi chan, da't yeu, dudng ven s o n g .
Abstract: Sliding of highway embankments along the Hau riverbank on soft ground has become a se- rious issue in An Giang. A failure of the National highway No. 91's embankment at km 88+937 in Binh My took place on March 22nd, 2010 with a rotational translational slide of a 70-m long embankment. The sliding Interrupted the highway No. 91 for several days, collapsed 2 houses, and had to mobilize more than 27 other houses out of the failure zone. An Giang province built a temporary road to reconnect the highway No.91. However, the causes and factors causing sliding have not been thoughtfully and sys- tematically Investigated. This paper Is to Investigate the causes and factors causing landslide, and the mechanism of the sliding by simulations using two softwares Slope/W2007 and Plaxis v8.5. The results show that river water and groundwater fluctuation, toe erosion, geological structure with a thick soft clay layer, increase of human activities, and climate change are key factors that dictate sliding.
Keywords: Sliding, slope, landslide, toe erosion, soft ground, embankment, riverbank.
1. Gldl THIEU
Binh My, vj tri nghien cUu, thudc huyen Chau Phu tinh An Giang each Long Xuyen 20 km ve phfa Bac va each Chau Dde 40 km ve phfa Nam. Sat Id xay ra d km 88-1-937 QL.91 vao ngay 22/3/2010 vdi chieu dai 70 m, rdng 25 m lam hU hdng hoan toan QL 91 (Hinh 1), gay thiet hai 2 can nha, va hon 27 can nha nam trong tinh trang bao ddng phai di ddi khdi khu vUe nguy hiem [1]. Sat Id gay tac nghen giao thdng tren QL.91 trong nhieu ngay, va Tinh phai lam dUdng tam de giai quyet giao thdng tam thdi. Sat Id gay ra nhieu
KS. LE XUAN VIET
TS. TRAN NGUYEN HOANG HUNG
Trudng Dai hoc Bach khoa TP. Hd Chi Minh
thiet hai nhung nguyen nhan va eP ehe sat Id vSn ehua dupc nghien cUu day dij mdt each khoa hpe. Mdt sd giai phap chdng sat Id d dja phUPng nhu SLf dung bao tai eat hay tudng epe ban nhung khdng hieu qua.
Bai bao nay nghien cUu nguyen nhan va eP ehe gay sat Id thdng qua md phdng dung hai phan mem Siope/W 2007 va Plaxis v8.5.
Hinh 1. Sat Id QL. 91 tai km 88 + 937 vao ngay 22- 03-2010 doan Binh My (Anh chup thang 8/2010)
2. DAC DIEM DIEU KIEN T l i NHIEN
Vj trf sat Id nam tren doan cong Idm khoang 2-3 km, chju tac ddng trUc tiep cua ddng ehay sdng Hau.
Phfa tren khu vUc sat Id la mdt trong nhUng doan eong dae trUng va that hep nhat tfnh tU Chau Ddc den Long Xuyen (Hinh 2), nen van tde ddng chay noi day Idn, ep sat, va tae ddng true tiep vao bd gay xdi Id, tao thanh lach sau gan bd va mai ddc hPn (ket qua khao sat dja hinh). Ket qua khao sat Idng sdng cho thay hien cd 3 lach sau vdi dp sau dao ddng tU -17 m den -21 m nguy CO dSn den sat Id la rat Idn (theo tai lieu khao sat dja hinh thang 11/2010 cua nhdm nghien cUu).
Muc nude noi day chju anh hudng bdi lij hang nam tu thang 8 de'n thang 12, mue nUde lu Idn nha't vao nam 2000 la -(-3,75 m va tha'p nhat vao mua khd nam 1990 la -0,73 m theo he cao dp Hdn Dau - Hai Phdng (sd lieu do Trung tam KTTV An Giang eung cap), vdi dp chenh mUc nude gan 5 m giOa hai mua.
Dja chat tai vj trf sat Id dupc khao sat lai vdi 1 hd khoan dja chat sau 30 m. Ket qua cho thay phan tang dja chat tUPng tu nhu sd lieu tham khao tU 2 hd khoan do dja phUPng thUc hien. Dja tang gdm ba Idp cP ban:
Idp set deo eUng 5,5 m tren mat, Idp bun set yeu khoang 18 m, va khoang 6,5 m dat set nCfa eUng den eao dp khao sat. Chi tieu co ly cua vi tri nghien cUu dupc cho d Bang 1. Ldp dat set deo cUng mat tao nen dn djnh gia do hap thu tai trpng mat, trong khi ben dudi la ldp bun set cd chieu dai tUPng ddi Idn 18 m ludn tiem an nguy cd xay ra sat Id.
KHOA HOC - CONG NGHE
Hinh 2. Hinh dang Idng sdng tai vi tri sat Id - km 88+937 tren QL. 91 doan xa Binh My (Google map)
Bang 1. Sd lieu dia chat tai vi tri sat Id tai km 88+937 tren QL.91
Ten ldp
Set ddo Cling Bun set Set nCfa cilng
Be day (m) 5,5 18 6,5
So bua SPT
9 1 20
(kN/m^) 18,7 15,5 19
c' (kN/m^)
25,3 16,3 30,1
ip' (a?) 12,4 20,2 17
E (kN/m^)
987 5.187 3.731
3. CO SO LY THUYET
Cac nguyen nhan gay sat Id dupe nghien cUu tren cP sd phan tfch dn djnh mai ddc thdng qua hai phan mem Slope/W 2007 va Plaxis v8.5, SLf dung cac sd lieu dja chat do nhdm nghien cUu trUc tiep thf nghiem va ed ddi chieu vdi sd lieu tham khao do dja phUPng eung cap. On djnh eua dudng ven sdng dupe danh gia thdng qua he sd an toan tU phan mem Slope/W 2007 va Plaxis v8.5. Phan mem Slope/W 2007 SLf dung ly thuyet can bang gidi han. He sd an toan (Factor of Safety, FS, Phuong trinh 1) dUpe djnh nghTa la ty sd giOa mdmen chdng trUpt vdi mdmen trUpt [2] vdi gia thiet mat trupt dang tru trdn.
hAoment chong truot
FS = ( 1 ) Ivloment gay truot
PhUPng phap Bishop dupc SLf dung de xac djnh he sd dn djnh, FS, dUa tren phuong phap phan manh cd dien cd xet den tuong tac giOa cac manh [2] va dupc xae djnh theo phUPng trinh (2):
Y. [c'b + (W.cosa - ub)tan^'] •— 1
FS = ^ (2) 'ZW.sina
Trong dd: e' - \Uc dinh; (j)' - gde ma sat trong; W- trong lupng cua mdi manh; b - chieu dai day cua md4 manh dpc theo cung trUpt; u - ap lUc nude Id rdng; a:
tan (/sin a
gde nghieng day eua moi manh, m = cosa +
He sd FSdUpc xae djnh theo (2) phai dam bao Idn hdn hay bang 1,4 de dat yeu cau thiet ke [3].
He sd dn djnh xae djnh bSng phUPng phap phan tu hOu han (REM) dupe dinh nghTa dUa tren quan he Ung sua't tai mdt die'm, la ty sd giUa sUc chdng cat eua dat,Tf, va Lfng suat cat, T, do tai trpng gay ra trong dat tai mdt diem (PhUPng trinh 3):
FS =
hay
~ FS'
cr'. tan ( tan«
FS FS • + — = a
FS .tan«
(3)
(4)
Trong dd: tan(t)^ = tan<p
FS
r = — . Phan mem FS
Plaxis xac djnh he sd FS bang ti'nh lap thCf va sai vdi thay ddi FS de dat dupe can bang d phuong trinh (4) khi Ung suat do tai trpng gay ra tai mdt diem dupe xac djnh [2, 8]. Trong phUPng phap nay, eae thdng sd tan(|) va e dupe rut gpn theo cdng thUe (5):
c
Cr Ttvisf
tan</>
tan (In- ( 5 )
Trong dd: evaif\a. thdng sd thi nghiem; c^ va (|)f la thdng sd eUdng dp suy giam. Qua trinh rut gpn dupe kiem soat bdi thdng sd EMsf. Thdng sd nay gia tang tUng budc eho de'n khi pha hoai xay ra. He sd an toan ehinh la ^ia trj SMsf lue xay ra pha hoai.
4. KET QUA
4.1. Phan tich on dmh
Nghien cUu nay md phdng hang loat eae trudng hpp khae nhau bang hai phan mem Geo-Slope/W 2007 va Plaxis v8.5 vdi sd lieu thuc te tai vj tri nghien cUu. Cae nhan td nhu sU thay ddi nUde mat va nUde ngam, xdi Id, tac ddng cua cac phUPng tien luu thdng cd tai trpng Idn, va sU thay ddi khf hau dUpc phan tfch ky. Tai trpng tinh toan gdm hoat tai xe 30 T dUpc qui ddi theo [3] cd gia trj la 16 kN/m^ va hoat tai ngUdi di bd la 3 kN/m^
4.2. Ket qua
Ket qua phan tfch dn djnh dupe tdng hop d b^ng 2. Md hinh phan tfch tieu bieu eho cac md phdng dung phan mdm GeoSlope/W the hien d Hinh 3. Hinh 4 the hien md hinh tieu bieu cho eae md phdng bang FEM dung phan mem PLAXIS v.8.5. Bang 2 cho tha'y he sd an toan xac djnh bang hai phan mem Slope/W 2007 va Plaxis v8.5 eho ket qua gan nhU nhau. Theo [2] he sd an toan tdng the tfnh theo FEM rat gan dung vdi he sd an toan tfnh theo phuong phap Bishop.
Bang 2. Ket qua phan tleh he soon dinh, FS, nho nhat tai vl tri sat Id
Phan tich Chua CO tcii trpng va chUa xet xoi Chiia CO t^i trong va xet xoi ch&n Xoi sau chan va tai trpng
Mac nUcJc cao nhat Slope/W
1,63 1,48 1.41
Piaxis 1,55
1,43 1,35
Mi,ic nadc thap nhat Slope/W
1.34 1,2 1,16
Piaxis 1,27 1.18 1,12
10 20 30 40 50 60 70 80 90
Distance Im)
Hinh 3. Md hinh xac dinh he sd dn dinh dung Slope/W 2007
KHc A HOC - CONG NGHE Tap Chl GTVT 6/2011
Hd xdi phat trien
Hinh 4. Md hinh xac dmh he soon dinh bang FEM ddng phan mem Plaxis v.8.5
5. THAO LUAN
5.1. Tac dpng cua ni/dc mat va nUdc ngam Vj tri sat Id ehju sU tae ddng cua nudc mat, nude ngam tU sdng Hau. Nude mat xuat hien cao khi lu dang, gay xdi mdn be mat, tham vao trong dat va cung vdi nUde ngam gay bao hda nen da't lam giam SLfc chdng eat eua dat. Tuy nhien, trong mua lu, mue nUdc sdng dang cao tao phan luc chdng lai sU trUdt [2], He sd an toan tfnh theo Slope/W 2007 dat gia trj Idn nhat vao mua lu la 1,63 nhUng vao mua khd FS giam cdn 1,34 (Bang 2), nhd hOn so vdi he sd an toan cho phep {FS = 1,4 ddi vdi phuong phap Bishop [3]) tUPng Ung vdi ty le giam la 17,8% (Slope/W 2007) va 18% (Plaxis v8.5). Ket qua nay eho thay trong mua kho, dudng ven sdng mat dan dn djnh rat de xay ra sat Id. Khi mUe nUde sdng ha thap, sUe chdng eat eua phan dat phfa treri muc nude ngam ed gia tang. Tuy nhien, sU gia tang sUc chdng cat nay nhd so vdi sU giam ap lUc nUde theo phuong ngang giup dn djnh mai doc. Hon nOa, khi muc nude sdng rut nhanh, ap lUe nadc Id rdng khdng kjp tieu tan het trong nen set bao hoa nude tao ra ddng tha'm lam tang nguy cd sat Id [2].
5.2. Tac dpng cua xoi chan
Xdi ehan mai dd'c doc dudng nam trong Idng sdng thudng xay ra d mat Idp da't yeu, va nam d vj tri udn cong nhat cua ddng sdng [2] dudi tac ddng cua ddng chay cd van tdc Idn gay ra xdi sau. Bang 2 cho tha'y khi xet xdi sau (Hinh 4) FS ed xu hudng giam, trong mualu FS tfnh theo Slope/W 2007 edn 1,2, giam 10%
(Slope/W 2007) va 7% (Plaxis v8.5) so vdi khi chua xay ra xdi. Xdi xay ra lam thay ddi hinh dang mai dde, gia tang n"guy cO mat dn djnh ed the dSn den sat Id.
Tac ddng cua xdi lam giam he sd dn djnh khdng dang ke trong ngan han, nhUng xdi Id chan ed kha nang gay ra sat Id edng hUdng, tUe la sat Id luc dau nhd, vung da't xdi bj cudn di do nude, mai dde dde hon, se kich hoat sat Id ke tiep vdi kich thudc Idn hdn. Hien tupng nay cd the nhan thay d mdt sd diem sat Id dpc theo QL.91 va d xa NhPn Hdi.
5.3. Tac dpng cua cac hoat dpng do con ngUdi Khu vUe sat Id nam tren tuyen dudng ndi bien gidi Cambodia thdng qua hai CLfa khau Tjnh Bien va VTnh Xuong. Cae hoat ddng thdng thUPng, van ehuyen hang hda, va du lich gla tang trong nhOng nam gan day lam gia tang nguy co mat dn djnh tuyen dudng ven sdng nay. Ket qua phan tfeh eho thay khi cd hoat tai, FS tiep tuc giam trong mua khd theo Slope/W 2007 la 1,16, giam 12% (SlopeA/V 2007) va 8% (Plaxis v8.5) so vdi trudng hpp khdng xet tai trpng (Bang 2).
Su gia tang tac cong cua con ngudi nhu tai trong xe vao ket cau laii. ng Ung sua't cat trong mai dde [2]
gay ra nouy cO sai Id cao.
5.4. •'' hU6ng ye'u to dja chat
Ldr dia chat yeu day 18m (SPT = 0-1) ben dUdi
Idp set mat deo cUng day 5,5 m (Bang 1) ludn tiem an nguy eP sat Id cho vj trf nghien cUu. Ldp set mat deo cUng vSn dam bao dp dn djnh can thiet eho vj tri nghien eUu khi tai trpng tac dung du nhd va mai ddc bd sdng cdn dam bao. Khi xet tai trpng, dp dn djnh giam 12% so vdi trUdng hop khdng xet tai trpng, va khdng dam bao dp dn djnh yeu eau {FS = 1.2 < 1.4) (Bang 2). Ket qua nay giai thi'ch ly do tai sao vj trf nay dn djnh trong khoang thdi gian dai ke tU khi dupe nang cap tu nam 1996.
5.5. Thao luan ve vj trf sat ldi
Dja hinh, dja mao, va thuy van ddng vai trd khdng nhd trong sU cd sat Id tai vj tri km 88-1-937 tren QL.91.
Vj trf sat Id nam ngay vj trf hep va udn cong Idm eua sdng Hau (Hinh 2), va dp ddc Idng sdng tai vj tri nay kha Idn gan nhu 1:1. Mua ID, nude tU thupng ngudn dd ve vdi van tdc Idn khoang 2-3 lan van td'c ddng chay mua khd [1 ]. Xdi Id chan xay ra manh cd the nhan thay khi so sanh vdi sd lieu dia hinh khao sat vao nam 1996 khi thUe hien nang cap QL91. Hien tUpng tUPng tU cung dupc nhan dien dpc bd sdng Chao Phraya, Thai Lan [6]. Cae hoat ddng bd'c dd hang hda bang thuyen cap true tiep vao bd dien ra tai vj tri nay trong khoang thdi gian dai eua dan dja phUPng gdp phan lam xdi Id mai dd'c (theo ket qua dieu tra cua nhdm nghien eUu).
Dac biet vao mua khd, mUe nUde sdng d eao trinh eua mat Idp dat yeu, cae hoat ddng bde dd nay day nhanh qua trinh xdi Id chan mai dde d vj trf mat Idp da't yeu.
Cac nhan td nay giai thfch tai sao sat Id xay ra tai vj tri nay vao ngay 22/03/2010 trong khi vung lan can v i n dn djnh mac du vdi dp dn djnh nhd.
5.6. Anh hUcing sU thay ddi khf hau
Trong nhOng nam gan day, dudi anh hudng eua bien ddi khf hau, va tac ddng eua cac dap thuy dien, thuy Ipi tren sdng Me Kdng d thupng lUu da tae ddng dang ke den ehe dp ddng chay va mue nude sdng Hau. D i i n bien mue nUde cao nhat va thap nha't qua eae nam eija sdng Hau d Binh My dupe the hien d Hinh 5. Tai vj trf sat Id, mue nude trong mua lu cd xu hudng giam, mUe nude lu Idn nha't (MNCN) vao nam 2000 dat cao trinh -i-3,75 m va thap nhat (MNTN) -0.67 m (2009). Trong khi vao mua khd mUc nUde sdng Hau cd xu hudng ha thap hdn tang nguy cd sat Id. He sd dn djnh d MNTN (2009) chUa cd tai trpng va xdi la 1,34 (Slope/W 2007) va 1,27 (Plaxis v8.5) nhd hPn so vdi he sd cho phep. MUc nude sdng cang ha tha'p, mai dd'c cang gan nguy cd sat Id. NMTN ed nguy cP ha tha'p hdn khi nhiet dp cao nha't trung binh trong mua khd se gia tang trung binh 2°C d khu vUc ddng bang sdng CLfu Long giai doan 2030-2040 [8].
4 3,6 3,2 2,8
I 2,4
•o-
^ • 0 . 4 O .0,5
-0,6 -0,7
•O.S
- M l / c nifb^ cao n h ^ ^ ^ - miiFC nif gc th^p nhai
1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 Thai glan (nam)
Hinh 5. Dien bie'n muc nude sdng Hau tai Binh My theo he eao do Hdn Da'u Hai Phdng [8]
KHOA H O C - C O N G NGHE
6. CO CHE SAT L 6
Cd ehe mat dn dinh tdng the cua dudng dap tren dat yeu thudng xuat hien dudi dang khdi trupt cong trdn [2]. Vj trf nghien cUu ed dja chat chu yeu la set mem va yeu (Bang 1), do dd mat pha hoai se cd dang dudng eong. Ket qua phan tich dn djnh theo hai phan mem Slope/W 2007 va Plaxis v8.5 cho tha'y hinh dang mat trupt nhan dupc deu ed dang dudng cong (Hinh 3, 4). Hinh dang pha hoai nay cung dUdc quan sat tai hien trUdng sat Id d QL.91 va d dpc bd sdng Nhdn Hdi trude UBND xa NhPn Hdi tinh An Giang.
7. KET LUAN
Nghien eUu nay thue hien hang loat cac md phdng vj tri sat Id tai km 88-^937 tren QL.91 d Binh My An Giang sCf dung cac sd lieu tU nhien cae tac gia true tiep khao sat. Hai phan mem Slope/W 2007 va PLAXIS v.8.5 dupe sCf dung de thue hien cac md phdng nay. Ket qua nghien eUu cho phep rut ra cac ket luan sau:
(1) Su thay ddi mUc nude sdng Hau va nUdc ngam anh hudng Idn den sat Id dudng ven sdng d An Giang.
(2) Qua trinh xdi chan lam thay ddi hinh dang mai dde theo hudng bat lpi va tiem an nguy eP mat dn djnh dudng ven sdng do cP che trupt cdng hudng.
(3) Su gia tang cae hoat ddng cua con ngUdi lam tang Ung sua't cat trong mai ddc, tang nguy eP sat Id.
(4 Ca'u true dja chat cua vj tri sat Id cd chieu day Idp dat yeu Idn keo dai den tan day sdng ludn tiem an ngu^ cP xdi Id dUdi dang trUpt sau.
(5) Anh hudng eua sU thay ddi khi hau lam mUe nude sdng Hau ed xu hudng ha tha'p hdn trong mua khd gay tae ddng bat Ipi den sU on djnh va lam gia tang nguy cP xay ra sat Id •
Ldi CAM ON
De tai nay dupe thue hien dudi sU tai trp cua Td ehUe hpp tac qude te Nhat Ban (JICA) va TrUdng Dai hoe Bach Khoa TP. HCM ma sd JICA-SUPREM B2-
02. Nhdm nghien eUu chan thanh cam on si no trp nay da giup nhdm nghien cUu hoan thanh cae cani ket. Nhdm nghien cUu cung nhan dUOc sU hd trd va ung hd rat Idn tU cac Sd, Ban, Nganh d tinh An Giang trong qua trinh thUe hien de tai nghien cUu.
TAI LIEU THAM KHAO
[1] Uy ban nhan dan tinh An Giang (2010), Bao eao tinh hinh sat Id tren dia ban tinh An Giang sd 84/BC-UBND ngay 17/8/2010
[2] Abramson L. W., Lee T. S., Sharma S. and Boyce G. M. (2002), Slope Stability and Stabilization methods, John Wiley and Sons, Inc., New York, 712 pp
[3] Bp Giao thong van tai (2000), Quy trinh khao sat thiet ke nen dudng d td dap tren da't ye'u 22TCN 262 - 2000 (Ban hanh kem theo Quye't dinh sd 1398/QD- BGTVTngay 01/6/2000 eua Bd trddng Bd GTVT)
[4] Brinkgreve, R.B.J., Broere, W. and Waterman, D. (2006), Reference manual Plaxis 2D Version 8, Plaxis bv P.O. Box 572, 2600 AN DELFT, Nether- lands, 200 pp
[5] Phienwej, N., Kitpayuck, P. and Suksawat, T.
(2010), Engineering In Tackling Problems of River Bank Erosion Instability in Thailand, International conference on slope, Thailand, pp 75-81
[6] Ungkurapinan, N., Nettayanuwat, T. and Noosong, M. (2010), Restoration of Chaa Phraya River- bank in the North Bangkok Combined Cycle Power Plant, International conference on slope, Thailand, pp 33-39
[7] Attasit, S. and Hathairat, M. (2010), Stability of Road Embankment Adjacent Canal in Rural Road Net- work, International conference on slope, Thailand, pp 251-254.
[8] Le Anh Tuan (2009), Tae dgng eua bie'n ddi khi hau len he sinh thai va phat trien nong thdn vung dong bang song Cdu Lang, Didn dan "DU trO sinh quyen va phat trien ndng thdn ben vOng d Ddng bang sdng CLfu Long", TP. Can Tho, Viet Nam, 5-6/6/2009, tr 1-3.
PHiroiNG PHAP HACH TOAN.
(Tie'p theo trang 16)
Logistics edn eung cap eo hdi md rdng ABC den cac day ehuyen eung Ung. PhUOng phap ABC trong cac day chuyen cung Ung cd the xac djnh cae eo hdi loai bd cac hoat ddng thUa, cae thanh vien tieu thu qua nhieu ngudn lUe trong day chuyen hoac tao nhUng lua chpn hap dSn hPn cho cau true kenh eung Ung hien tai. Bang 1 chi ra sU khae biet ve lai sinh ra tu 3 kenh phan phdi khae nhau tinh theo 2 phUPng phap truyen thdng va phUOng phap ABC.
Trong khi he thdng hach toan ehi phf truyen thdng dua vao tae nhan sd lupng se ehi SLf dung lupng doanh thu hay lUpng hang ddng ehuyen de phan dinh chi phi, phUPng phap ABC SLf dung nhieu nhan td hPn.
Vi du, mdt he thdng nhae hop de phuc vu cac nha ban le va mpt he thdng nhae thung hang de phuc vu mdt nha ban si hoac eae thuong nhan Idn. PhUPng phap ABC se xac djnh chfnh xac sU khae nhau ve ehi phf SLf dung 2 he thdng dd. Nd ciJng cd the danh gia ehi phi cua eae thanh phan ehfnh xae (nhU quan ly don dat hang, van tai...) ed lien quan den viee phuc vu khaeh hang.
Nhu vay, trong vi du nay, cac nha ban le thUc te
tao ra lai nhd nhat trong khi cac nha budn Idn va nhUng ngUdi ban si tao lai Idn hdn, dieu nay each tfnh truyen thdng khdng dUa ra dupe. MUc Ipi nhuan cd ve cao tao ra bdi kenh ngudi ban le cd the hudng ban lanh dao tdi nhUng cd gang sai lam la phat trien kenh nay vdi mong mudn la nang cao tdng Ipi nhuan.
Neu phUPng phap ABC dupc trien khai khi dd doanh nghiep se nhan ra rang mdt chien lupc nhu vay that sU tao ra hieu qua. Ndi each khae, toan bd day chuyen eung cap cd the SLf dung ABC nhu vay de tai tao cac chu trinh trong td ehUe de tao ra mdt Ipi the canh tranh dudi dang giam ehi phi hoac sU khae biet eua djeh vu.
Vdi nhOng lpi ich eua phUPng phap ABC nhU da neu d tren, hy vpng se Ung dung thanh edng cho cac doanh nghiep ndi chung va doanh nghiep logistics Viet Nam ndi rieng •
Tai lieu tham khao:
[1]. PGS. TS. Jii Sy Sua - Giao trinh Thuang vu van tai- NXB Giao thdng van tai. Ha Ndi 2010.
[2]. Mentzer, John T. and Firman, John - Logistics control systems in the 2P' century - Journal of Business logistics. Vol 15 - 2008.
[3]. Byrne, Patrick M, and Markham, William J - Improving Quality and Productivity in logistics - Qak Brook, IL, USA: Coueil of logistics Managemetn, 2001
