11
KHOA H Q C - C O N G N G H ENGHIEN cufu PHIJOING P H A P TINH TOAN DO SAU Xdl LUONG TAU DlTflll TAG DONG CUA MOT MO HAN KHONG NGAP PHUC VU GIAO THONG THUY
ThS. PHAM THANH NAM GS.TS. LUONG PHUONG HAU
Truong Dai hgc Xay dung
Tdm t i t : DUa trdn phin tIch hd thdng ly thuyd't vS trudng ddng hgc 2D trgng Idng sdng khu vuc cd cdng trinh md hkn vk cd chd xdl phd bid'n Idng dSn, tkc gli lukn kn da dd xuk't md hinh md phdng sd vk l$p phdn mSm XOLUTA-01, nhkm tU ddng hda tinh tokn d0 xdi sku Idng dkn do md hkn ddn gky ra, phuc vy vl$c lUa chgn ckc tham sd bd tri tUng md hkn trong l$p phUdng kn quy ho?ch chlnh tri do^n c$n trong giao thdng thOy.
TU khda: Md hkn, xdi Idng sdng, giao thdng thOy.
Summary: On the basis of the 2D river dynamic and bed erosion theories, the paper has proposed a new method and software (XOLUTA-OI) to calculate the bed level change due to the impact of a single non- submerged groin. The model can be used as a tool for engineers to select / arrange each groin in planing a river trainning system for navigation purpose.
Keyword: Groin, the river bed evolution, navigation.
1 . D^t v I n d l
Trong thiet k l cdng trinh md hdn, thyc t l chi quan tdm nhieu den xdi eye bp d I u m u i md hdn d l tfnh todn I n dinh cdng trinh. Viec tinh todn hieu qud xdi sdu luong lach (xdl pho b i l n ) hidn chua cd cdc chT d i n trong quy trinh quy phgm, d l i vdi d y an Idn mdi cd d i l u kien nghien cQu thf nghidm tren md hlnh vdt ly. Do d d , de phyc vu cho vide ipa chpn vd xdc djnh cdc phUPng dn tham s d b d tri md h a n , e l n phdi nghidn eUu phUPng phdp tfnh toan hidu qud xdi sdu eCia mdt md hdn.
2. V t u d n g cDa phUdng p h d p
Sau khi bd trf cdng trinh, h$ thdng md hdn ed tdc dyng thu hep ddng chdy mdt cdch ro ret. Ngodi hi$n tupng xdi eye bd dau mui md hdn do ddt b i l n v l kdt cau ndi bd ddng chdy, trong phgm vi dnh hUdng cCia nd, luu tdc se tdng idn do ddng chdy d p h i n Idng ddn phfa ngodi md hdn d i n vdo, d i n d i n khd ndng xdi sdu Idng d a n , dd Id hipn tupng xdi p h i b i l n . Hi$n tupng xdi p h i b i l n chfnh Id ed c h d xdi sdu ludng t l u ma ngudi t h i l t k l c i n quan tdm. Trong qud trinh t h i l t k l , de k i l m tra tdc dyng xdi sdu cOa tQng m6 hdn vd t i l n hdnh dieu ch?nh cdc tham s l b l trf, c6 t h i tfnh todn hieu qud xdi cua tUng md hdn ridng bidt.
Ddi vdi mdt md hdn, d cdc vj trf khdc nhau (khodng each ve phfa ha lUu so vdi mui md han), mUc dd tdng len eCia luu tdc eung khdc nhau. Thdng thudng thi d vj trf eang g i n mui md hdn thi dd tdng Idn cija luu td'e cdng Idn. Nhung luu tdc dgt trj s l eye dai thudng x u l t hipn t^i vj trf mdt e l t co hpp.
LUu tdc tang Idn t$o d i l u kidn ed bdn de xdi sdu luong Igch. Luu tdc tang n h i l u se ed khd ndng xdi ludng Igch Idn, luu tdc tang it, khd nang xdi sdu se ft
hoii s u xoi sau long ci^n co rJap ung dUpc yeu clu Cliay lau hay khong la van de ma ngUdi lam ti/vKn thiel ke quan Iam de dieu chinh phuong an bo tri cong trinh Vl vay. de linh toan do xoi sau cua luong tau puoi tac dung cua m o i mo han. truoc hel can nghien CUu tinh toan sU phan Po lai lUu toe, tren cO so do, se tinh toan do sau dong chay co the dat duoc sau khi b6 tn m6 han
3, PhUdng p h a p n g h i e n cUu
Su dung phuong phap ve binh do dong chay [2];
Phuong phap phan tich xu ly long hop cac so lieu thuc (Jo, Xay dung mo hmh toan va mo hinh vat ly
4. Ket qua t h i n g h i e m p h a n b d lUu tdc khu vUc m d han
Moi so hmh anh ve dong chay khu vUc mo han duoc the hien tren hmh 1
Nhan thay rang, mo han da lam bien doi Ion den phan bd luu toe dong chay tren mat bang, ca v6 lUu
•Jhuong l^n tn so Phan long dan trong khu vuc giam tec 6 thuong luu cua mo han se duoc boi tu. phan long dan trong khu vuc tang toe 6 ha luu mo han se xuat hien xoi sau, bao gom ca xoi cue bo khu vuc dau mui mo han va XOI pho bien trong phan long ddn con lai. Chmh dieu do cho phep nguOi ta thuc hien viec trnh loan hieu qua ciia cong tnnh mo han theo y do XOI sau luong lach chay tau qua doan can.
Dang nuoc thuong luu Dong chay i<:hu vuc mat cit CO hep Hmh 1. Trang thai chay khu vuc mo han khdng ng^p Qua so lieu thi nghiem (bang 1, hinh 2 va hinh 3) nhan thay. 6 mat c&t vi tri mo han, luu toe Ion nhSt xuat hien tai thuy true gan mui mo han. Phan bo tren phLtong ngang cua luu toe trung binh thuy Uiic tai mat c§t nay co dang hinh thang lech, gan nhu lam giac
T?p chi GTVT 5/2012
E
Tgl mdt cat co hep, xud't hien trj s l luu td'e trung binh thCiy tri/e Idn n h l t Idn hPn cd luu too Idn n h l t tgl mui md hdn. Day Id nhUng yeu t l quan trpng t$o ra sU xdi sdu l u l n g lach.
Bing 1. Ket quit thi nghi$m phan bd iUU tdc khu vtfc md hkn khdng ng$p
IWanghljp
i . 0 . 2 B
B Thftj
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2
3
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ni+50 4 3 , « 46,26 46.95 44.45 38,26 38,00
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HrnA 2. Phkn bd tren m$t bang cua luu tdc trung binh thuy true khu vyc mo hkn, tru&ng hifp UB = 0,2
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^
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H > - -
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: - / ' - - " " " ' — - 1 - - - . '
r ..^ -^r
t^i mdt cdt d vj trf md hdn.
5. Tfnh todn phan bd lUu tdc t^i mdt c l t Idng d i n d vj trf md han
Tgi mdt c I t Idng d i n d vj trf md hdn, n l u khdng xdt d i n s y h^ t h I p eye bd eCia myc nudc 6 d I u mui md hdn, mpt cdch g i n dung cd t h i cho r i n g , trdn mdt cdt idng d i n 6 vj trf m6 hdn, cdc luu tdc trung binh thuy tryc ed t h i dupe md td b I n g cdng thUc cCia ddng chdy d I u , thi sau khi trir di di§n tfch ddng chdy bj md hdn che cdn, cd t h i Ung dyng phUdng phdp vd binh d l ddng c h i y d l tfnh todn phdn b l luu t i e tgl mdt cdt vj trf md hdn.
Chia mdt c I t Idng d i n ngodi md han thdnh mdt sd ddi ddng chdy, gid t h i l t dp d i e vd hd s l nhdm giUa cdc ddi ddng chdy khdng sai khdc nhau n h i l u , thi luu tdc trung binh cua m6i ddi ddng chdy dupe tfnh todn nhu sau:
Vj = KHj ^ ( 1 )LUu lupng thdng qua Idng d i n ngoai md hdn Id:
Hinh 3. Phan bd trdn m0t bkng cua luu tdc trung binh thdy true khu vt/c md hkn, trudng htfp UB = 0,4
Sy phan bd lai lUu tdc do tdc dung ci!ia md hdn da t h i hjpn rd rdt trdn thi nghiem trong md hinh t i n g qudt ndi trdn. Nhung ddi vdi mdt dogn sdng cy the, tinh hlnh khdng gidng nhu trong mang thf nghidm. Trong trudng hpp khdng ed d i l u kien lam md hinh vdt ly, sp phdn b l lai luu tdc ddng chdy cd t h i tfnh todn dupc khdng ? Co t h i dya vdo nhSng quy lugt thijy lUe cd bdn, suy dien nhu sau:
Sy tang luu tdc Idn n h l t xay ra 6 vj tri mdt eat eo hpp. Nhung cac y l u td thCiy luc tpi mdt e l t co hpp lai ed lidn quan chdt che vdi cac yeu t d thiiy lye tai mat e l t d vi trf md han. Hdn niJa, sU phdn bd I9I lUu t i c d mdt cat vj trf md hdn se xdc djnh dupe. Cdn tgi vj trf m§t cat CO hep, phdn b l luu tdc chua dupe xac dinh.
Vi vdy, trudc h i t e l n xdc dinh sy phdn bd l^ii luu tdc
Q = K£b,Hf'
(2)1=1
Trong dd:
Vj - Luu tdc trung binh eCia eac ddi ddng c h i y (m/s);
Q - T i n g lUu lupng (mVs); neu than md hdn cd ddng t h i m thi can Xrii di luu lUpng tham;
bj, Hj - C h i l u rdng vd dp sau trung binh cCia cac ddi ddng chdy (m);
m - S l ddi ddng chdy chia ra tren mat e l t ; K - H i n g s l t^ Id, tfnh nhU sau:
K = ^ ^
Zb,Hf'
(3)LUU lupng bj H, ^ ed the tinh dUde tU so lieu dja hinh, Q da b i l t , nen ed t h i tfnh dupc K. TU dd, theo cdng thilc (1), tim dupc phdn bd luu tdc tren mdt e l t md hdn.
( T h e o tdi iidu [4]: Sd lidu thyc do cho t h I y , luu tdc d d I u mui md han tUdng ddi Idn do ed su ha t h I p mpc nudc, eho ndn can c l i t i l n cdch tfnh toan tren. Trudc h i t , dya theo phUPng phdp trdn, tfnh todn phdn b l luu lupng trong dieu kien ty nhien, dem p h i n lUu lUpng tu nhidn bi md hdn ngdn cdn trii di luu iupng t h I m qua md hdn, dem dang phdn b l tam giac cCia t j lUu lUpng g i n vdo mdt e l t udt d vj trf md hdn. Ty luu lupng tgi dau mui md hdn Idn nhd't, d bd ddi dien b l n g khdng, quang glOa phan b l dUdng t h i n g ) .
Cdn eU vdo phdn bd luu lUpng tdng cdng, cd the tim dupe iuu tdc trung binh cua cae ddi ddng chdy trdn mdt e l t idng d i n 5 vj tri md hdn. Luu tdc 6 phy cdn md hdn vd trong l u l n g i^ch cung tim dupe theo cac cdng thiJc dudi ddy:
LUu t i c trong luong t l u vd d khu vUe g i n dau mui md hdn V^ dupe tfnh nhU sau:
Trong d d :
Qh - luu lUdng thdng qua ludng Igch hodc 6 dau
11
KHOA H O C - C O N G N G H E mui m6 h^n (mVs);Af,- diSn tich thong thOy trong Iu6ng iSu h o l e d khu vi/c gSn d^u mui m6 h^n:
Li;u tdc ci,tc dgi tUdng Cfng Vf i^:
Vf = l(Vf,(5)Trong d d , k i4 h0 sS Idn hdn 1. Cd t h ^ can cOf v4o sd lidu thdng kd vd phdn bd lau tdc trung binh thCiy tri^c thi,Ic do dd x4c djnh k, thdng thudng ISy k b 4 n g 1 , 2 .
6. T i n h t o d n p h d n b £ lUu t d c t ^ i m$t cdt co h ^ p c i j a m 6 h d n k h d n g n g $ p [4]
- Vi tri mdt cdt CO hop cd t h i xdc djnh theo so dd khu nudc vdt h? luu md hSn, dUdc thd hidn trdn hlnh 4.
tri 00 hop ddu n&m trdn mdt p h i n g nSm ngangJd}
ddc dSy sdng giOa 2 mat cdt bdng khdng, bd q u a * IhSt doc dudng vd tdn tlidt cgc bd giora 2 mat cdt. Cta cU vdo phuong trinh lidn tuc vS phuong trinh BernoiJ ydu td ddng chdy cCia ddi ddng chdy gIBa 2 mat e l l J vi tr( m d hdn vd vi tri co h?p, dUOc suy ra theo cdng thUc quan hd nhu sau:
V . ' - ( 2 g h ; + V , ^ ) v . + ^ i ! ^ = 0 (10)
Hinh 4. Khu nudc v$t />? luu md hkn khdng ng$p vk m$tcStcoh^p
Trdn dogn sdng tUdng ddi th4ng, khodng cdch tU md hdn d i n mdt e l t co hpp hg lUu md hdn khdng ngdp, ky hidu Id L^j, dupc tfnh nhu sau:
Lp = V B2 (6) Trong d d :
B2 - c h i l u rdng tuyen chlnh trj hodc c h i l u rdng mdt nude tdng sdng ngodi md hdn (m);
y - hd s d , ed lidn quan d i n dp thu hpp dipn tfch Idng sdng AA d myc nudc tinh toan, dUdc xdc djnh theo bdng 2.
AA dUde tinh todn nhu sau:
AA = A - A '
(7)Trong d d :
A - Didn tfch Idng sdng dudi mpc nude tfnh todn tai vl trf ddt md h d n , trUdc luc xdy d y n g cdng trinh (m=);
A' - Didn tfch Idng sdng (dUdi m y c nudc tfnh todn) bj md hdn ehe c h i n (m^).
Bing 2. Quan h$ AA vd h$ sd iff AA
V 0,50 0,50
0,60 0,46
0,70 0,42
0,80 0,38
0,90 0,34 - Chia mdt e l t co hpp thdnh nhieu ddi ddng chdy, s d ddi bdng sd ddi da chia tgi mdt cdt vj tri md hdn.
Ky hidu b2, h2, V2 b i l u thj chieu rdng, dd sdu trung binh vd luu t i e trung binh cdc ddi ddng d mdt e l t vj trf md hdn; bg, h^, VQ Id cdc dai lupng tUdng Ung tgi mdt cat eo hpp. Dat:
(9) Gid t h i l t rang, mat cat vj trf md han vd mat e l t vi
Trong d d , Sn dupc xdc djnh nhU sau:
_ eh;
h,+ H)
(11)T i n g luu iupng Q cd t h i v i l t thdnh:
Q = e2^b2h3V, (12) C h i l u rpng mdt e l t 6 vj trf co h^p Bj. Id:
7. D i l u k i l n t f n h t o d n
Khi tfnh todn, c i n ed nhi7ng sd li^u sau:
- Dja hinh dogn sdng bd trf h$ t h i n g md hdn;
- Mdt cdt ngang, mdt cdt dpc vd vdt li^u xdy dyng ci!ia cdng trinh;
- M y c nude tfnh todn vd luu lupng, h$ sd nhdm Idng sdng tUPng Ung;
- Thdnh p h I n c l u tgo Idng d i n ;
- Dd sdu ehqiy t l u t h i l t k l , luu tdc b l mdt eho ph^p trong l u l n g t l u .
8. Cdc b u d c t f n h t o d n e g t h i
Budc 1. Tfnh todn phdn b l luu t i c t^i mdt e l t vj tri md hdn, tim cdc c h i l u rdng b2. dp sdu h2 , luu tlcV2 cua cdc ddi ddng. Vdi quan nidm cho r i n g , vi^c tdng luu td'e ChT x l y ra eye bd t^i khu v y c g i n mui md h^n, phqim vl dnh hudng cOa nd cung h^n c h i , vi vdy khi tfnh todn V 2 , khdng n h l t thid't theo phdn b l hinh tam gidc chdng Idn p h i n luu lupng t y nhidn do md h^n che c h i n ;
Budc 2. Gid t h i l t e (thudng l l y 0,8 - 0,9), thay vao (11), tim dupc gid trj Sn cDa tUng ddi ddng;
BUdc 3. Theo cdng thifc (10), tim lUu t i c trung binh cCia cdc ddi ddng t^i mdt e l l co hpp ( V - ) ;
Budc 4. Theo cdng thUc (12), tim tdng luu lupng, SO sdnh vdi tong luu lUpng da cho. N l u 2 gid trj gSn nhau thi col n h u tfnh todn da h o d n tdt; N l u khdng, phdi gid t h i l t l^i gid trj cCia E, Idp 1^1 qud trinh tfnh todn t u budc 2, den khi thda man y d u c l u thi dCfng l^i;
Budc 5. Theo cdng thUc (13), sau khi tfnh tofin c h i l u rdng cDa cdc ddi d d n g (b^), tfnh dUpc ting c h i l u rdng cCia mdt e l t co hpp B,,.
9. Tfnh t o a n d p s d u x d i I u 6 n g t l u ^ Sau khi xdy d y n g m6 h d n , luu lupng ddn v j t i f f l mat e l t se phdn b d 1^1, luu lUpng ddn vj trong pi™
ludng Igch c h ^ y t l u se dupe tdng Idn. Vi v$y, lulng Igch eung sd dupc tdng Idn tUPng Ung. Cdn ciJ vko khdi nidm lUpng c h u y i n bDn cdt ddy trudc v l sau kW xdy d y n g cdng trinh khdng d l i [3], cd t h i tfnh toftti
Tap Chi GTVT 5/2Q12 I
g i n diing dp sdu l u l n g t l u theo cdng thufc tfnh todn dd rpng tuyen chlnh trj xuat phat tU quan d i l m can b i n g tdi cdt day:
B, -B\^
(14)Cd the dCing cdng thiJe trdn d l tfnh todn dd sdu xdi trong l u l n g tau, chi thay ddi y nghTa cCia cdc ky hidu 6 trdn nhu sau:
B-|, B2 - c h i l u rdng l u l n g t l u trudc vd sau khi xdy dyng md han;
Q-|, Q2 - I l n lUpt b i l u thj lUu lUpng thdng qua mdt e l t l u l n g tau trudc vd sau khi xdy d y n g md hdn (m^/s);
H-j - dd sdu trung binh trong phgm vl l u l n g t l u trudc khi xdy dyng md hdn (m);
H2 - dp sdu trung binh trong phgm vi l u l n g t l u sau khi xay dyng md hdn (m);
y-j, y2 - so mu, cd lidn quan d i n (xem bdng 3);
VI tinh hinh xdi ludng tdu chij y l u dupc q u y l t djnh bdi luu t i c trung binh sau khi chlnh trj vd ddc d i l m biln cdt trudc khi chlnh trj, ndn thUdng l l y :
V - Luu tdc trung binh trong ludng tdu sau khi xdy dyng md han;
V u - Luu tdc khdi ddng ciia hgt bun cdt trong lu- ong tau trUde khi xdy dyng md hdn;
Bang 3. Quan h$ y-f, y2 va V/Vf^
r^H
y i y z
i , i ~ 1,5 1 , 1 3 1 , 3 4
1 , 5 ~ 2 , 5 1 , 2 3 1 , 4 6
2 , 5 - 1 0 1,3 1 1,5 5 Can cU cdng thUc (14), col c h i l u rdng l u l n g tdu trudc vd sau khi xdy dyng md hdn khdng d l i B^ = B2, se cd cong thUc:
Dd xdi sdu Udc tfnh trung binh trong l u l n g t l u la;
H,=H,f^j (16)
10. Xay dyng chUdng trinh ty ddng hda tfnh todn d? xdi sdu iudng tau
a. Sadd khdi tinh tokn
Tren cd sd ly thuyd't da trinh bdy d trdn, t i l n hdnh xdy dyng chUPng trinh t y ddng hda tinh todn. S d d l khoi cua chUdng trinh dupe t h i hien trdn hlnh 5. Y nghTa cae ky hidu xem trong cdc hudng ddn tai cdc myc tren
b. ChUdng trinh phdn mdm XOLUTA-01 ChUPng trinh p h i n m I m tfnh xdi l u l n g tdu dUpc ddt tdn Id XOLUTA-01, da dUpc viet theo ngdn ngU Matlab.
c. Tinh nang phdn mem XOLUTA-01 - Bdy la phan m I m tien fch cho cdc ky sU tU van sijf dyng trong tfnh todn d y bdo hieu qud ci!ia phUdng dn b l trf md hdn chlnh trj dogn can, tCf dd cd t h i thay d l i cdc tham s l bd trf cdng trinh de dgt dupc ydu cau
h i , b i . Q O , Q ' . d , C)elta_Q
r t h ^ p e p s l l o n
T i n h t o d n c h o m ^ t c ^ t t i j n h l A n A i , V I , K
T i n h t o d n Cho m ^ t c ^ t cA m d h d n v d m $ t c d t CO h ^ p h 2 . b 2 . V 2 , K h e , b e , V e ,
« p s i l o n _ n , B c , Q c , Q
T f n h t o d n x 6 i l u d n g t d u : H I , A , V I . Q 1 , Q Z , V Z , y i . y Z , H Z . D e l t a H
Hinh 5. Sd dd khdi tinh tokn xdi iudng tku v l dd sdu luong tdu thiet ke. Dieu kien ling dyng Id md hdn khdng ngdp ddi vdi luu lupng thiet k l lulng tdu.
- Diiu kidn dau via:
+ Dja hinh Idng sdng khu vyc b l trf md hdn;
+ B l trf vd kfch thude md hdn;
+ Vj trf l u l n g tau;
+ Luu lUdng tfnh todn;
+ DUdng kinh hat trung binh tren Idng d i n dogn sdng.
- Kdt qui diu ra:
+ Phdn bd lUu td'e tgi mdt cat 6 vj trf md hdn;
+ Phdn b l luu toe t^i mdt e l t co hep hg luu md hdn;
+ Luu t i c tai khu vyc g i n mui md hdn;
+ Dd xdi sau l u l n g t l u ,
- PhUdng thUc the hidn kd't qui: dang bdng b i l u . 11. lifng dyng chUdng trinh phan mem Xoluta- 01 tfnh todn kiem tra hi^u qud xdl sdu i u l n g t l u cOa cdng trinh chinh trj doan cgn Lao Hodng tren sdng Ld
a. Gidi thidu cdng trinh do^n Lao Hokng trdn sdng Ld [1]
Cdng trinh chinh trj dogn Lao Hoang trdn sdng Ld ndm trong d y dn Cdl t^o ndng d p t u y I n vdn tdi thuy V i p t T r i - T u y e n Quang,
Dogn c^n Lao Hodng (Km65 •^ Km67) Id dogn cgn ndm sdt thUdng lUu ngd ba L6 - Chdy. Do dnh hudng cOa hyp \uu, tai dogn c^n ndy xuat hien hidn tupng nudc ddng gay bdi lang vdi t i c dp boi l i n g hang ndm khodng 0,15m. Can chlnh trj ndng d p de luu thdng an todn cho dodn xd lan day 800T {4x200T + 135CV) vd tdu t y hdnh 200T, dp sdu l u l n g tau 2,2m (dudi myc nude 95%), c h i l u rdng 36m.
I K H O A HQC - U U N U N U n c
- Tuydn chlnh tri: B Q J = 250m, phii hop vdi b^
r6ng cDa do?n s6ng On dinh t i l Km70+S00 dSn Km82+500.
• B6 tri cdng trinh: s6 Udng m6 h4n t6ng cOng 14 12, trong d6, 66 tri 8 md h i n 6 bd trSi td T l dSn T8 vS 4 md hSn d bd phJi til H I dSin H4. DiSu ch?nh v| tri v4 chiSu dSi o4c md h4n theo khoang c4ch hdp Ij' giOa cSc md h4n: md hkn bd Idi c4ch nhau (1,5 -i- 3)L|(
; md h4n bd Idm c4oh nhau (1 <• 2)L^ ; md h4n bd t h i n g oSoh nhau (1,2 -i- 2,5)L|(, vdi L|< 1^ ohiSu dSi md han thed phuong vudng gdc vdi trgc ddng ohSy.
- Cao trinh dinh md hin:
Cum md h4n thuflng luu: CTBMH = + 1 6 , 3 m ; C y m md h4n ha luu: CTDMH = + 1 4 , 8 m . MJt bSng bd tri cdng trinh xem hlnh 6.
Bing 4. Kg! qui linh loin mdtc t i xdi luSng liusm chlnh tri
^"^^.'--^:yM :x.. J-r-^
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Hlnh 6. Bd tri m$t b^ng cdng trinh chinh trj do^n c?n Lao Hokng
b. Tinh tokn dU bko xdi iudng tau theo phdn mdm XOLUTA-01
Tfnh todn xdc djnh hidu qud xdl l u l n g tdu dUpc tien hdnh eho md hdn T3, vdi luu lupng tao Idng miia nudc trung. Tgi mdt cdt ngang cua md han T3, sdng rdng 445m, c h i l u ddi md hdn Id 145m. Tim l u l n g tdu nam cdch bd trdi 234m. LUu lUpng t^o Idng mua nUdc trung Id 3300m^/s. LUu lUpng t h I m qua md han l l y Id Q' = 0 , 1 Q Q . Ldng sdng ed k i t c l u sdi, cudi, dudng kfnh h^t trung binh Id d = 0,01m. C h i l u rdng l u l n g t l u Id 36m.
K i t qud tfnh todn cua chUPng trinh cho t h I y luu tdc trung binh t^i ludng tdu trong d i l u kipn t y nhidn Id V i = 1,0m/s. Sau khi cd md hdn, vdn tdc trung binh tren l u l n g tdu tdng khodng 3 0 % , d^t d i n V2 = 1,3m/s. Vdi dudng kfnh hgt d = 0,01m, s y gia tdng vdn t i e trdn l u l n g tdu d i n d i n h i ^ n tupng xdi sdu them Idng d i n . D d sdu l u l n g tdu trudc chTnh trj H-| = 6,1 m vd sau chfnh trj dgt Ho = 7,7m. L u l n g tdu dupe xdi thdm DH = 1,55m. K i t qud tfnh todn t i n g hpp dupe t h i hidn trdn bdng 4.
3. So sknh kdt quk dtf bko vdi sd ll$u thtfc td Theo sd lidu thuc do v l binh d l doan Lao Hodng trdn sdng Ld ndm 2009 vd ndm 2010 Id thdi gian trudc vd sau khi xdy dyng cdng trinh, trdi qua mua lu ndm 2010, Cdng ty TU v I n Xdy d y n g Viet Hd da t i l n hdnh phdn tfch hidu qud xdl sdu l u l n g t l u bang cdch chdp dja hinh tren 88 mdt cdt.
Qua k i t qud phdn tieh cd t h i t h I y , sau thdi gian chlnh tri qua mua lu, trdi qua mUc nudc tao Idng, tren toan doan cgn Lao Hodng l u l n g t l u deu dupc xdi
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s l u , trung binh Id 1,32 m. Tgi mdt cdt md hdn T3, d^
xdi sdu Id 1,59m. NhU vdy. k i t qud tinh todn (1,55m) khd sdt dOng vdi tinh hlnh thyc t l da x l y ra, ehUng tfi dp tin cdy ciia chUdng trinh tfnh todn theo p h i n mIm XOLUTA-01.
12. K £ r t i u $ n v d k i l n n g h j K^t l u $ n
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tupng xdi eye b | vd xdi p h i b i l n , v a n dyng phUdrig phdp ve binh d l ddng chdy, bdi b d o da d l X I J 4 phUdng phdp tfnh todn xdi l u l n g t l u theo sd d l phdji, bd luu t i c khu v y c md h d n .
Bdng v i | c kdt hpp md hlnh toan, m d hinh vdt ly vd phdn tfch quy ludt thCiy lye v l phdn b d vdn t i e vung cdng trinh md hdn d l d l ra thudt todn, Idp chUdng trinh t y ddng hda tfnh todn, phan m I m XOLUTA-01 da dupc xdy d y n g d l tfnh todn d y bao hidu qud xdi lu- l n g t l u eCia mdt md h d n . Ddy la p h i n m I m tidn ich, r i t d n t h i l t eho cdc ky s u t u v I n t h i l t ke dudng thily trong qud trinh lya chpn cdc tham s d bd tri cdng trinh.
ChUdng trinh vd p h i n m I m XOLUTA-OI dd dUpc k i l m djnh trdn bdi todn m l u v d iJfng d y n g thdnh cdng cho vide d y bdo hi^u qud xdi l u l n g t l u cho hd thing md hdn chTnh trj dogn c g n Lao Hodng trdn sdng Ld, phu hpp vdi tdi lidu thyc do
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Tdi l i $ u t h a m k h d o
[1]. Bill Vi^t Ddng vd cdng s y (2009), DU an diu tu xky dung cdng trinh "cii t^o nkng cdp tuydn vin tii thOy Vidt Tri - Tuydn Quang" (tdp 1 : thuyet minh di^
dn) do Cdng ty tU v I n xdy d y n g cdng trinh Thuy (WA- COSE) Idp 12/2007.
[2]. LUdng PhUdng Hdu (1992), D^ng luc hgc ddng sdng, TrUdng dgi hpe Xdy d y n g H d Ndi.
[3]. LUdng PhUdng H d u , N g u y d n Thanh Hoan, N g u y i n Thj Hdi LJ (2011), Chi dkn ky thuat cdng tt%
chlnh trj song, NXB xdy d y n g . Ha Ndl. 1 [4]. Phgm T h d n h N a m , N g u y d n Dinh LUdng, LUdng PhUdng Hdu (2010), Thdy luc hgc cdng trlnti chlnh tri sdng, NXB X d y D y n g , H d Ndi.
