thuyet minh qh thuyuan 2009.doc
TRANSCRIPT
PHN I : M U
Thuyt minh Quy hoch chi tit Khu nh c Thn Thng 2, x Thu Xun, thnh ph Hu - 8-
CNG HO X HI CH NGHA VIT NAM
c Lp - T Do - Hnh Phc
********************
THUYT MINH QUY HOCH CHI TIT
KHU NH C THN THNG 2, X THU XUN, THNH PH HU
CHNG 1: PHN M U
I. S cn thit u t v mc tiu nThc hin ch trng ca UBND Tnh Tha Thin Hu v vic gii to ti nh c cc h thuc Cn Hn phc v cc mc tiu pht trin kinh t x hi ca Tnh. c s phn cng ca UBND thnh ph Hu, Trung tm Qun l nh v t thnh ph Hu phi hp vi n v t vn l Cng ty CP Kinh doanh Nh Tha Thin Hu lp quy hoch chi tit Khu nh c Thn Thng 2, x Thu Xun, thnh ph Hu to qu t ti nh c cc h gii to ti Cn Hn v u gi mt phn to ngun ti u t vo cc cng trnh ti nh c khc.
Mc tiu n:
- Khai thc hp l li th a hnh v cnh quan khu vc, to qu t xy dng nh ti nh c cho cc h gii to Cn Hn v cc nhu cu xy dng khc.
- n nh, ci thin mi trng nng cao cht lng khu dn c hin c theo tng bc.
- Lm c s cho vic lp cc d n u t xy dng tng b phn trong khu vc theo k hoch hng nm.
- Lm c s qun l v kim sot vic xy dng trong khu vc gip cho cng tc qun l th c hiu qu.
Chnh v vy, nhm khn trng p ng nhu cu to qu t phc v ti nh c, to s n nh cho ngi dn trong v ln cn khu quy hoch th vic u t xy dng Khu nh c Thn Thng 2, x Thu Xun, thnh ph Hu l cn thit.
II. C s thit k quy hoch
- Lut Xy dng ngy 26/11/2003;
- Lut t ai 26/11/2003;
- Quyt nh s 166/Q-TTg ngy 10/8/1999 ca Th tng Chnh ph v vic ph duyt iu chnh quy hoch chung thnh ph Hu n nm 2020;
- Ngh nh s 12/2009/N-CP ngy 10/02/2009 ca Chnh ph ban hnh v vic qun l d n u t xy dng cng trnh; v Thng t 03/2009/TT-BXD ngy 26/3/2009 ca B xy dng quy nh chi tit mt s ni dung ca ND 12/2009/N-CP.- Ngh nh s 08/2005/N-CP ngy 24/01/2005 ca Chnh ph ban hnh v quy hoch Xy dng;
- Thng t s 15/2005/TT-BXD ngy 19/08/2005 ca B xy dng v hng dn lp, thm nh v ph duyt n quy hoch xy dng;- Quyt nh s 03/2008/Q- BXD ngy 31/03/2008 ca B Xy dng v ban hnh quy nh ni dung th hin bn v, thuyt minh i vi Nhim v v n Quy hoch Xy dng;
- Quyt nh s 04/2008/Q- BXD ngy 03/04/2008 ca B Xy dng v ban hnh Quy chun k thut Quc gia v Quy hoch Xy dng;
- Quyt nh s 06/2005/Q- BXD ngy 03/02/2005 ca B Xy dng v ban hnh nh mc chi ph Quy hoch Xy dng;
- Thng t s 03/2008/TT-BXD ngy 25/01/2008 ca B xy dng v hng dn iu chnh d ton xy dng cng trnh;
- Quyt nh s 2989/Q-UB ngy 29/12/2006 ca UBND tnh Tha Thin Hu v vic phn cng, phn cp v u quyn gii quyt mt s vn trong cng tc quy hoch v u t xy dng trn a bn tnh Tha Thin Hu;- Cng vn s 2937/UBND-XD ngy 02/7/2009 ca UBND Tnh Tha Thin Hu v a im quy hach xy dng tI nh c phc v Cn Hn.- Chng ch quy hoch s 56/2008/CCQH ngy 12/5/2008 ca S Xy dng Tha Thin Hu;
- Cng vn s 8557/UBND- XD ngy 25/4/2008 ca UBND thnh ph Hu v vic ng cho php lp d n quy hoch v u t h tng k thut cc khu xen ghp, ti nh c thuc a bn x Thu Xun,- Quyt nh s 2490/Q-UBND ngy 13/11/2009 ca UBND thnh ph Hu v vic ph duyt nhim v thit k quy hach chi tit Khu nh c Thn Thng 2, x Thu Xun, thnh ph Hu.- Thng bo s 42/TB-UBND ngy 10 thng 3 nm 2009 v Thng bo s 106/TB-UBND ngy 03/6/2009 ca UBND thnh ph Hu kt lun ca ng ch Phan Trng Vinh - ch tch UBND thnh ph Hu v phng n quy hoch Khu inh c thn Thng 2 x Thu Xun, thnh ph.
CHNG 2: C IM HIN TRNG KHU T XY DNG
I. V tr v c im iu kin t nhin:
- Pha Bc gip khu dn c Thn Thng 2, X Thu Xun.
- Pha Nam gip knh Nam sng Hng.- Pha ng gip khu dn c ni ra ng Minh Mng, ng quc l 49A.
- Pha Ty gip knh thot nc ranh gii gia x Thu Bng, huyn Hng Thu v x Thu Xun.
II. a hnh:
Khu quy hoch c a hnh g i v vng trng, rung la hoa mu, mt phn ngha a, xung quanh c ng giao thng v nh , nm mt bn l mng thot nc ca khu vc. Khu vc quy hach c knh Nam sng Hng hin khng cn s dng.
Khu vc g i c nh cos l 13.88m, khu vc rung la v hoa mu thuc vng thp trng, c cos hin trng khong 3,6m n 4,2m nn thng ngp lt khi ma ma n. Khu dn c ln cn c cos khong 6.0m n 7.0m.
III. Kh hu:
Ma ng lnh v m t bt u t thng 9 n thng 02 nm sau. Ma h nng t thng 3 n thng 8. Thng 10, 11 thng b nh hng ca p thp nhit i v bo, l thi gian hay xy ra l lt.
Nhit trung bnh hng nm l 24,70C. Ma nng nhit trung bnh l 270C, cc i ln n 390C v ma ma nhit trung bnh l 200C, c khi xung n 130C.
- m trung bnh hng nm l 86,9%.
- Lng ma trung bnh 3.491 mm/nm.- S ngy ma trung bnh: 183 ngy/nm.
- S ngy nng trung bnh: 182 ngy/nm.
- Ma h c gi ng Nam v gi Nam.
- Ma ng c gi ng Bc v gi Bc.
IV. iu kin x hi:
-Tnh hnh dn s v lao ng:
Khu quy hoch thuc Thn Thng 2, x Thu Xun vi dn c tha tht. C c cu dn s tr. T l pht trin dn s mc trung bnh nm l 1.15%.
Lao ng phn theo ngnh ngh nh sau:
+ Lao ng nng nghip chim khong 40%
+ Lao ng tiu th cng nghip chim 28%
+ Lao ng cc ngnh khc chim 32%
- Tnh hnh kinh t: y l khu vc sn xut nng nghip, vi vic hnh thnh cc khu dn c c pht trin v xy dng, cc h dn sng ch yu nh vo bun bn nh v sn sut nng nghip. Nhn chung, iu kin kinh t x hi khu vc ny gp phi kh khn.
V.Hin trng s dng t:Khu vc d n quy hoch ch yu l rung la hoa mu, t trng cy, mt phn ngha a miu th, xung quanh c ng giao thng v nh , nm mt bn l mng thot nc ca khu vc.t hin trng
: 5.150m2 chim 2,63%
t trng la
: 39.420m2 chim 20,11%
t trng mu
: 13.640m2chim 6,95%
t trng cy
: 60.610m2 chim 30,91%
t b hoang
: 6.270m2 chim 3,20
Mt nc
: 3.410m2 chim 1,74%
t cng trnh tn gio, tn ngng: 210m2 chim 0,11%
t ngha trang
: 34.390m2 chim 17,54%
Cc lai t khc
: 32.970m2 chim 16,81%
Tng din tch quy hoch: 196.547m2 chim 100%
VI. Hin trng kt cu h tng k thut
Hin ti cc tuyn ng trong khu quy hoch ch yu l ng t v ng btng khong 1,5-2,5m i vo cc cm nh .
H thng cp in sinh hot, cp nc sinh hot ca khu vc cha hon chnh. Hin c tuyn cp in 22KV, v tuyn cp nc chnh chy dc ng Minh Mng, ng 49A t c dn vo cc khu dn c. H thng in chiu sng cha c.
Thot nc ma, nc thi sinh hot t cc h dn ca khu vc ny cha ng b, ch yu l cc mng h. H thng thot nc b mt v thot nc cc h dn vo cc tuyn mng c sn, chy v sng cu Bi ra thng ngun sng Hng. Khi c ma l ln, nc trn qua cc khu rung la xung quanh, t chy ra sng cu Bi ra thng ngun sng Hng
VII. Cc ch tiu thit k quy hoch:
1. D bo quy m dn s : t 3.210- 3.630 ngi.2. D bo quy m t ai v phng n s dng t :
- Quy m khu quy hoch : 196.547m2.
- Phng n s dng t : 54- 61m2/ngi.Trong :
- t
: 25-28m2/ngi; chim 46,2- 45,9%.
- t giao thng : 19-21 m2/ngi; chim 35,2- 34,4%.
- t cy xanh : 6-7m2/ngi; chim 11,2- 11,5%.
- t cng cng : 4-5m2/ngi; chim 7,4-8,2%.
3. D bo quy m h tng k thut, x hi:
- Cc hng mc h tng k thut d kin xy dng : san lp mt bng v cm mc phn l; h thng ng giao thng i ngoi, i ni, b va, va h; h thng cp thot nc gm thot nc t cc h gia nh, thot nc ma v nc thi, h thng in chiu sng cng cng; h thng in sinh hot v trm bin p, h thng cp in thoi v cp truyn hnh.
- Cc cng trnh cng cng phc v cho khu dn c v khu vc ln cn gm:
+ Cng trnh gio dc
: trng mu gio mm non.
+ Cng trnh y t
: trm y t.
+ Cng trnh thng mi
: sin th, quy dch v tp ha.
+ Cng trnh th dc th thao : sn cu lng, qun vt, sn cu ...
+ H thng cng trnh cng vin mt nc, cy xanh, ng i do ...
4. Cc yu cu v nguyn tc v nh hng pht trin th, t chc c cu khng gian, cc cng trnh u mi v h thng cng trnh h tng k thut :
Trn c s t chc, b tr phn khu khu chc nng, mi quan h kinh t x hi ph hp vi cnh quan kin trc khu vc quy hoch. Trn c s cu trc pht trin quy hoch lm r vic t chc cc khng gian, b tr cng trnh im nhn trong khu vc, t chc hnh khi kin trc theo trc v tng l t, xc nh ch gii xy dng trong khu vc. Xc nh ngun cp in, cp thot nc cho khu vc v u ni h tng k thut khu vc ln cn.
PHN III: PHNG N QUY HOCH
* Phng n quy hoch kin trc cnh quan:
Vi cc mc tiu ca n, cn c hin trng a hnh a vt v h tng thuc khu quy hoch, t chc tuyn ng chnh ca khu quy hoch bm theo a hnh v u ni vo h thng h tng c sn. C th:
B tr tuyn ng chnh rng 24m (4,5m+15m+4,5m), chy dc knh thu li Nam sng Hng, hng ng Bc u ni vo ng T c - Thu Dng, hng Ty Nam i bn in hn Chn. Tuyn ng chnh cn li t vung gc knh thu li, bm st v knh thot nc khu vc, hng Ty Bc u ni vo hng tuyn ng T c - Thu Dng, i ng qua lng ng Khnh.
Cc tuyn cn li rng 19,5m (4,5m+10,5m+4,5m) b tr song song v vung gc vi 2 tuyn chnh. Cc tuyn ng bm theo a hnh, m ly khu vc g i pha Bc khu quy hach (gn khu dn c hin c), b tr lm cng vin cy xanh. Trn c s t chc cm cng trnh cng cng (nh tr mu gio, trm y t v dch v thng mi) v tr trung tm khu quy hoch. Cc cng trnh cng cng bm theo trc ng chnh, kt hp vi cng vin cy xanh khu vc g i lm trung tm chnh ca khu dn c, thun tin cho cuc sng mi ca c dn. Cc cm nh vn v bit th c b tr dc ttrc ng 24m v xung quanh khu trung tm chnh to ra khu xanh p c mt xy dng va phi. an xen l cc khu nh phn l vi din tch ph hp b tr ti nh c cc h gii to thuc khu vc Cn Hn. Cc di t cn li b tr cy xanh, bi xe ...
i vi khu vc tip gip khu dn c dc ng 49A, t chc tuyn giao thng ti v tr knh Nam sng Hng c tim tuyn chy theo ranh gii khu quy hoch. Ti y b tr cc dy nh phn l v bit th c mt tin hng ra ng 49A, to b mt p cho khu quy hoch.
Khu t gia ng 24m t knh Nam sng Hng u ni vo hng tuyn quc l 1A - T c Thu Dng i n lng ng Khnh v mng thot nc ca khu vc lm cng vin cy xanh mt nc, y t chc lm h sinh thi vi nhim v iu ho tiu thot nc ca khu vc cng nh cnh quan xung quanh.
Vi phng n ny ch tiu quy hoch s dng t:
- t xy dng nh
: 69.025m2 chim 35,12%
- t xy dng cng trnh cng cng: 15.333m2 chim 7,80%
- t giao thng, bi xe
: 86.956m2 chim 443,24%
- t cy xanh
: 25.233m2 chim 12,84%
Din tch khu t quy hoch
: 196.547m2 chim 100%
S l b tr: 171 l nh vn bit th kch thc bnh qun 8m*20m; 429 l nh lin k kch thc binh qun 4m*20m.Cc l c khong li xy dng l 4m.Phng n quy hoch tn dng ti a cc qu t, b tr cc chc nng ca khu dn c mt cch ng b v hi ho gp phn lm p b mt th ca khu vc Ty Nam thnh ph ni chung v thnh ph Hu ni chung.
II. Phng n quy hoch h tng k thut:
1. Quy hoch san nn :a. Cc cn c tnh ton: - Cn c vo bn hin trng khu t quy hoch t l 1/500 vi nhng c im v a hnh a mo, a cht thy vn c nu ln trn;- Cn c vo cao , dc v hng dc ca cc khu dn c k cn v xung quanh;- Cn c vo TC 4449 - 87;
b. Gii php thit k: dc nn theo hng thp dn t pha ng Bc sang pha Ty Nam. Cao thit k san nn khu vc cao nht +6.80m; thp nht +4.20m .
Thit k san nn theo tng ph trnh tnh trng dc v mt pha trong mt tuyn ph.
Cao thit k ln nht: + 6.80m (v tr nh phn lu trong tng ph)
Cao thit k thp nht: + 4.20m (v tr ca x nc ma v nc thi )
dc thit k san nn t 0,2% n 0,6%, m bo cho vic thot nc mt.
Chiu cao p nn xy dng trung bnh t 0,5 n 2,5m.
Chiu su o nn xy dng trung bnh t -0,5 n -1,0m.
t p c m cht tng lp theo ng quy trnh, m bo m cht K= 0,85 i vi nn xy dng v i nn ng th K = 0,95 n 0,98; t p phi m bo cao trnh khng ch trong ton khu vc v dc mt ti thiu (i=0,4%) theo tiu chun quy phm.
*Tnh ton khi lng t o p: Khi lng t o p ch tnh cho phn nn xy dng, khi lng o p ca phn ng v mi taluy c tnh phn thit k ng.
Khi lng t p tnh ton nn xy dng : 304063.16m3.
Khi lng t p taluy nn xy dng : 7174.09 m3.
Cao thi cng = Cao thit k - Cao t nhin
Tnh khi lng t ca mi c xc nh theo cng thc chung:
V = F x htctb (m 3)
Trong : F- din tch mi hnh (vung, tam gic ....)
htctb - cao thi cng trung bnh (nu cng du th c tnh bng trung bnh cng ca tt c cc cao ).
Khi cao thi cng cc nh c cng du:
V1 = F x (m3)
2. Quy hoch giao thng :
a. Cn c tnh ton: - Cn c vo Quy phm k thut thit k ng ph, ng qung trng th: 20 TCN - 104 2007;- Tiu chun thit k o ng mm: 22TCN-211-06;
- Cn c vo Tiu chun thit k ng t: TCVN 4054 - 2005;
- Tiu chun thit k ng t TCVN 4054-98;
- Tiu chun thit k ng th TCVN 104-83;
- Da vo cao , hng dc, dc dc, dc ngang mt ng ca cc tuyn ng c ph duyt v thit k quy hoch;
- Da vo cao san nn, hng thot nc cc b v hng thot nc chung ca khu quy hoch v cc khu vc xung quanh;
- Da vo hin trng ca khu t quy hoch vi nhng c im v a hnh a mo, a cht v thy vn vv...
- Cn c vo mc ch v ngha phc v ca tuyn ng, tnh hnh pht trin kinh t, v dn c cc khu vc ln cn trong vng , chng ta tin hnh thit k mng li giao thng.
b. Gii php thit k: * Giao thng khu vc:
- Mt ct 11 c l gii l 24.0m (4.5m+15m+4.5m) .
- Mt ct 22 c l gii l 19.5m (4.5m+10.5m+4.5m) .
- Mt ct 33 c l gi l 5m (ng do).c. Ni dung thit k:
* Cc ch tiu k thut ca tuyn ng:
- Tiu chun thit k ng t TCVN 4054-2005;
- Tiu chun thit k ng th TCVN 104-2007;
- Quy trnh thit k o ng mm 22TCN 211-06;
- Quy trnh thi cng v nghim thu mt ng b tng nha 22TCN249 -98;
- Quy trnh thi cng v nghim thu lp cp phi dm trong kt cu o ng t 22 -TCN 334 -2006;
- Da vo bn v quy hoch chi tit cc tuyn ng trong khu quy hoch, cn c vo mc ch v ngha phc v ca cc tuyn ng, tnh hnh pht trin kinh t x hi v lu thng gia khu quy hoch vi cc trung tm kinh t, chnh tr, vn ho v cc khu dn c khc.
* Bnh tuyn:
Tim cc tuyn ng ch yu ph thuc vo bn Quy hoch chi tit v h thng giao thng.
* Trc dc tuyn:
Tuyn ng thuc vng ng bng nn thit k ch yu bm theo nn ng t nhin v cao ngp lt cc b trn tuyn ng.
Bn knh ng cong li nh nht Rli= 200m.
Bn knh ng cong lm nh nht Rlm= 100m.
* Kt cu o ng:
xut lp o ng nh sau:
- Lp 1: B tng nha ht mn dy 7 cm.
- Lp 2: Cp phi dm loi 1 dy 35cm.
-Lp 3: t cp phi ln cht K=0,98, dy 50cm.
- Lp t cp phi ln cht K=0,95.
- Nn ng ln cht K=0,95.
* Kt cu l ng:
- Lp 1: Lt gch TAZZERO 300X300 VXM50#, BTSN 100# dy 100.
- Lp 2: Lp t cp phi ln cht K=0,95.
3. Quy hoch h thng thot nc ma:
a. La chn h thng thot nc ma:- a hnh khu vc kh thun li nc t chy nn ta trit a hnh thot nc t nhin.
- Cng ma trong khu vc ln q20=300l/s/ha ma theo ma nn xy ra hin tng ma ma lu lng ln nhng vo ma kh lu lng nh.
Vi nhng c im trn ta chn h thng thot nc ma ring hon ton.b. Vch tuyn thot nc ma:Nguyn tc:
- Mng li thot nc ma l mt khu thit k bo m thu v vn chuyn nc ma ra khi khu dn c mt cch nhanh nht, chng ng ngp ng ph v cc khu ln cn. t c yu cu trn trong khi vch tuyn ta cn phi da trn cc nguyn tc sau:
+ Nc ma c x thng vo ngun (song, h gn nht bng cch t chy)
+ Trnh xy dng cc trm bm thot nc ma
+ Khi thot nc ma khng lm nh hng n v sinh mi trung
+ Khng x nc ma vo nhng vng trng khng c kh nng t thot, vo cc ao t ng nc v vo cc vng d gy xi mn.Phng hng thot nc ma ca khu vc
- a hnh chia lm 2 khu vc:* Lu vc 1: Cc khu c hng thot vo cng vin cy xanh h iu ho, to lu lng nc trong h. Trong ao h c khe nc thot ra khe sui bn ngoi khi lu lng trong h cao hn mc cho php.
* Lu vc 2: Khu vc c c ly v dc kh thun li nc ma thot trc tip ra khe sui.
c. Xc nh lu lng ma tnh ton:- Lu lng ma tnh ton c xc nh theo phng php Cng gii hn . Trong thi gian ma ly bng thi gian nc chy t im xa nht trong lu vc n tit din tnh ton. Ti thi im lu lng ma t ti gi tr ln nht.
- Chn chu k vt qu cng ma tnh ton: Ni chung cc lu vc thot nc ma u c din tch ln, lu lng vo ma ma rt ln, ta chn chu k ma tnh ton cho khu vc dn c P=2 nm.
d. Cc cn c tnh ton:- TCVN 51-1984. Thot nc-mng li bn ngoi cng trnh tiu chun thit k;- TCVN 4531:1998. Cp nc bn trong-Tiu chun thit k;- TCVN 372-2006. ng b tng ct thp thot nc;e.Lu lng nc ma:
Thi gian ma tnh ton
Thi gian ma tnh ton c xc nh nh sau:
Ttt = Tm + To
Tm: Thi gian tp trung nc ma trn b mt t im xa nht n h thu nc. Ly theo gi tr tham kho 10 pht.
To: Thi gian nc chy trong ng n tit din tnh ton.
Lo: Chiu di tuyn cng(m).
vo: Vn tc nc ma chy trong cng(m/s).
M = 2 khi a ca lu vc thot nc ma bng phng.
*Cng ma tnh ton.
(l/s/ha)
P: Chu k trn cng(65%.+ st p ln nht Uh.- Chn phng n b tr n 1 pha cho loi ng c b rng l%1,55% 40 mt (tu thuc vo v tr hin trng mt bng).+ Xy lp trm bin p dng 4 ct 14m.Tng cng : 319 tr BTLT kt hp v mng tr thch hp. + 297 ct BTLT 10,5m . + 22 ct BTLT 14m.+ S dng loi n c ch s kn b phn quang hc IP66, kn ngn linh kin in IP54, cp cch in cp I, bng cao p Sodium.
+ Cng sut bng n: 150W.+ Nhu cu ph ti chiu sng:
- Tuyn 1: 3000W (3,0kW).- Tuyn 2: 5250W (5,25kW).- Tuyn 3: 5400W (5,4kW).- Tuyn 4: 6750W (6,75kW).- Tuyn 5: 5850W (5,85kW).- Tuyn 6: 6000W (6,0kW).- Tuyn 7: 3600W (3,6kW).+ T in iu khin t ng:
T in c thit k ng ngt iu khin t ng bng rle thi gian.
Thi gian hot ng ca n trn c s tc ng ca b iu chnh thi gian, t 18 gi n 22 gi ton b n u sng vi cng sut 150W, t 22 gi n 5 gi sng ngy hm sau hot ng ch ban m theo rle thi gian v thi gian cn li th ton b n u tt.
6. Quy hoch h thng cp nc:
H thng cp nc sinh hot v phng chy cha chy c u ni vi tuyn ng PVC D110 (do do Cng ty TNHH Nh nc mt thnh vin Xy dng v cp nc Tha Thin Hu qun l) dc theo ng 49A bng ng HDPE c ng knh t 90 n 160 b tr mch vng, nhnh ct. Ti cc v tr cui tuyn ng c chn bt c th u ni thm khi cn thit.
C th:ng HDPE D63: 141 md.
ng HDPE D110: 575 md.- Ti mt s v tr ng ng c cm cc nh v tuyn ng.
- p lc lm vic ti cc tuyn ng 8 kg/cm2.- bo v tuyn ng HDPE ri bng tn hiu ng ng cp nc su di mt t thin nhin 0,40 m.- C 10 hng cu ho 3 ca D100 c b tr dc theo tuyn ng D110 v D160.
- B tr van kho cho cc tuyn ng.
- H van D100 xy gch ch tuynen c, c an btng ct thp, khung ni ngoi thp gc L75 x 75 x 6.
- H thng cp nc c thit k theo h thng kt hp, ng ng c b tr trn va h.
- Vt liu trong khu quy hoch chn ng nha HDPE.
- Thi cng h thng cp nc bng phng php hn gia nhit.
* Thng k lu lng cp nc: Theo TCXD - 33-2006, i vi thnh ph Hu l th loi 1:
Nc sinh hot
: 200lt/ngi/ngy m.
Nc phc v cng cng
: 10%.Nc cng nghip dch v th: 10%.Nc tht thot
: 10%.Nc cho yu cu ring ca nh my x l nc 8% .C th: Lu lng ngy tnh ton (trung bnh trong nm) cho h thng cp nc tp trung c xc nh theo cng thc sau:
Trong : qi = 200 : tiu chun cp nc sinh hot.
Ni = 3630 : s dn tnh ton.
fi = = 99% : t l dn c cp nc .
D: Lng nc ti cy, ra ng, dch v th, tht thot .
- Lu lng nc tnh ton trong ngy dng nc nhiu nht:
Qngy.max = Kngy.max ( Qngy.tb = 1,3x991.0 = 1288.3 (m3/ngy).Trong : Kngy.max = 1,3: H s dng nc khng iu ho.- Lu lng nc tnh ton trong ngy dng nc t nht:
Qngy.min = Kngy.min ( Qngy.tb = 0,8x991.0 =792.8 (m3/ngy).Trong : Kngy.min = 0,8: H s dng nc khng iu ho.- Lu lng gi tnh ton trong ngy dng nc nhiu nht:
qgi.max = Kgi.max xQngy.tb / 24= 2,08 x 991.0/24 = 85.80(m3/h).Trong : Kgi.max = : H s dng nc khng iu ho. max = 1,3: H s k n mc tin nghi ca cng trnh, ch lm vic. max = 1,6 : h s k n s dn trong khu dn c .- Lu lng gi tnh ton trong ngy dng nc t nht:
qgi.min = Kgi.min x Qngy.tb / 24= 0,1 x 991.0/24 = 4.10(m3/h).Trong : Kgi.min = min x min = 0,5 x 0,2 = 0.1: H s dng nc khng iu ho
min = 0,5: H s k n mc tin nghi ca cng trnh, ch lm vic. min= 0,2 : h s k n s dn trong khu dn c .* H thng cc tr cu ho:
- Theo TCVN 2622:1995 - Phng chy chng chy cho nh v cng trnh - Yu cu thit k, lu lng nc cha chy l 10 lt/giy;- Tr nc cha chy ngoi nh c b tr dc theo ng giao thng, khong cch gia cc tr khng qu 150m, b tr ng ba hay ng t ng.- Ton khu vc d kin t 09 tr cu ho ti cc v tr thun li nht trn cc tuyn ng cp nc chnh.PHN V: KT LUN V KIN NGH
to qu t phc v ti nh c cc h gii to ti Cn Hn v tng bc chnh trang th to v p cnh quan cho thnh ph Hu, gp phn xy dng th Hu ngy cng khang trang hin i th vic u t xy dng h tng k thut Khu nh c Thn Thng 2, x Thu Xun, thnh ph Hu l cn thit.
V vy, knh ngh UBND thnh ph Hu, phng Qun l th v cc ban ngnh quan tm xt duyt n quy hoch chi tit Khu nh c Thn Thng 2, x Thu Xun, thnh ph Hu c c s qun l cng tc xy dng trn khu vc v c th tin hnh trin khai cc d n tip theo.
n v lp: X nghip T vn xy dng - Cng ty C phn Kinh doanh Nh Tha thin Hu.
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