Bang tinh tuong vay 04 11 reviewed

DUNG TIEN CONSTRUCTION CO., LTD TIMES SQUARE TOWER

HOA BINH CORPORATION. REE TOWER

HOABINH CORPORATION CONG HOA XA HOI CHU NGHA VIET NAM

oc lap - T do - Hanh phuc

THUYET MINH

TNH TOAN KHA NANG CHU LC HE TNG VAY VA HE GIANG CHONG THI CONG SEMI-TOPDOWN

Cong trnh: REE TOWERChu au t: REE CORPORATIONn v thi cong: HOABINH CORPORATION

n v thiet ke: CONG TY CP XAY DNG KIEN THANHTp. Ho Ch Minh, thang 11 nam 2009HOABINH CORPORATION CONG HOA XA HOI CHU NGHA VIET NAM

oc lap - T do - Hanh phuc

THUYET MINH

TNH TOAN KHA NANG CHU LC HE TNG VAY VA HE GIANG CHONG THI CONG SEMI-TOPDOWN

Cong trnh: REE TOWERChu au t: REE CORPORATIONn v thi cong:

HOABINH CORPORATION

n v thiet ke thi cong: CONG TY CP XAY DNG KIEN THANH THIET KE CHU TR THIET KE

GIAM OC

TRAN MINH THI LE HIEU LIEM LE HIEU LIEM Tp. Ho Ch Minh, thang 11 nam 2009TNH TON KH NNG CHU LC H TNG VY V H GING CHNG

D N: CAO C VN PHNG REE TOWER

a ch: S 9 on Vn B Qun 4 TP.HCM-----------------------------------------------------------I. TNG QUAN V CNG TRNH

Cao c vn phng Ree c xy dng ti s 09 on Vn B Qun 4 TP.HCM. Cng trnh gm c 3 tng hm +21 tng + 2 tng k thut + 1 tng mi. Ba tng hm c s dng lm hm xe, phng k thut, ba tng hm c thit k thi cng theo phng php TopDown. H chng tng chn gi o t l tng vy (diaphragm wall) dy 800mm, vi chiu su ca tng vy t 25m n 30m so vi mt t hin hu. H o su nht ti v tr h thang my l 14.60m. H chng l sn b tng ct thp + thp hnh H350x350x12x19 v thanh H300x200x8x12 c b tr hp l ti v tr h thang my v ram dc bo m vic thi cng tng hm an ton.

II. QUI TRNH THI CNG TOP-DOWN TNG HM

1. Giai on 1: Thi cng tng vy, cc khoan nhi, kingpost H400x408x21x212. Giai on 2: H nc ngm n di su 2.600m v o t ln 1 xung su 2.100m (cao -3.100)

3. Giai on 3: Thi cng sn trt v lp dng h chng tm H350x350x12x19 ti v tr h thang my v ram dc.

4. Giai on 4: H nc ngm n di su 4.200m v o t ln 2 xung su 3.700m (cao -4.700)5. Giai on 5: Thi cng b tng dm, sn tng hm 1 + Lp dng h chng tm H350x350x12x19 ti v tr h thang my v ram dc.

6. Giai on 6: H nc ngm n di su 7.200m v o t ln 3 xung su 6.700m (cao -7.700m)

7. Giai on 7: Thi cng b tng dm, sn tng hm 2 + Lp dng h chng tm H350x350x12x19 ti v tr h thang my v ram dc.

8. Giai on 8: H nc ngm n di su 10.700m v o t ln 4 xung su 10.200m (cao -11.200m)

9. Giai on 9: Lp h ging chng H350x350x12x19 ti su 8.60m (cao -9.600m)10. Giai on 10: H nc ngm n di su 12.700m v o t cc b ln 5 xung 12.2m (cao -13.200) cho cc i mng, chiu cao i 2500mm (khng o t khu i mng h thang my).

11. Giai on 11: Thi cng i mng cao 2500mm + v mt phn dm sn tng hm 3 trn mt bng tng hm 3.

12. Giai on 12: Lp dng thang chng tm H350x350x12x19 cho khu vc h thang my (cao -12.400).

13. Giai on 13: H nc ngm n di su 15.300m v o t cc b ln 5 cho i mng h thang my n su 14.800m (-15.800m)

14. Giai on 14: Thi cng i mng h thang my + phn dm sn cn li (sn dy 500mm) ca hm 3.

15. Giai on 15: Thi cng ct b tng ct thp cc tng hm v vch thang my

16. Giai on 16: Tho h chng tm v thi cng ram dc v cc l trng.

III. THNG S T NN V KT CU THI CNG

PARAMETER OF SOIL PROPERTIES AND STRUCTURES

Trn c s h s kho st a cht cng trnh c tng cng 5 h khoan. B dy, v ch tiu c l ca tng lp t gia 5 h khoan l khc bit khng nhiu. Chng ti chn tr trung bnh tnh ton nh sau: Thng sK hiuLp t p, b tng Lp 1Bn st, chyLp 2Ct pha, doLp 3St pha, do cngn v

M hnh vt liu

ng x ca vt liu

Dung trng kh

Dung trng t

H s thm

Mdul dn hi

H s Poisson

Lc dnh

Gc ni ma st

Gc gin n

H s gim ng sut tip xc

ng x thm ca ph. t tip xc

Chiu dy lp tModel

Type

(((unsat)

(((sat.)

Kx=Ky

E0

c

Rinter

Perm

hMC

Dr

16.0019.501.2100000.305.010.0000.65Imperm

0.7MC

UnDr

8.7015.20.002100000.3318.88.5800.70Imperm

11.3MC

Dr.15.119.100.05320000.3014.512.000

0.75Imperm

24.36MC

UnDr.16.419.500,002270000.35

50.217.380

0.75Imperm

5.64-

-

kN/m3

kN/m3

m/ngy

kN/m2

-

kN/m2

oo-

-

m

Dr = Drained: thot nc

UnDr = Undrained: khng thot nc1. Thng s tng vy.

Tng vy (diaphragm wall), chiu su tnh t mt t t nhin l 25.00m n 30.00m, tng dy 800mm. B tng dng thi cng l b tng cp C40 (fcu = 40 N/mm2) c modul n hi l Eb = 3,25.107kN/m2. Cng tnh ton i vi b tng trong nc l Rb = 25%.R= 25%.400 = 100kG/cm2.Tn cu kinc trng chu lcK hiuGi trn v

Tng vy 800mm Tnh cht vt liu

cng chng nn

cng chng un

H s PoissonMaterial Type

EA

EI

Elastic

2,304.10771,229.1060,15-

kN/m

kN/m2/m

2. Thng s h thanh chng.B tr h thanh chng thp hnh H300x200x8x12, H350x350x12x19, ti cao trnh thch hp v ti v tr h thang my v ram dc, s dng thp c mc SS400 hay (CT34) c modul n hi E = 2,1.108kN/m2, cng tnh ton f=2100kG/cm2, fv = 1350kG/cm2. C th s dng 2 tng chng nh sau:a. Tng chng 1: B tr ti cao -1.000m ( su 0.000m)Cu kinThng sK hiuGi trn v

Thanh chng 1 H350x350x12x19Tnh cht vt liuMaterial typeElastic-

cng dc trcEA3,579.106kN

Bc neoLs7,5m

b. Tng chng 2: B tr ti cao -4.400m ( su 3.400m)

Cu kinThng sK hiuGi trn v



Bc neoLs7,5m

c. Tng chng 3: B tr ti cao -7.500m ( su 6.500m)




Bc neoLs7,5m

d. Tng chng 4: B tr ti cao -9.600m ( su 8.600m)




Bc neoLs7,5m

e. Tng chng 5: B tr ti cao -12.400m ( su 11.400m)




Bc neoLs7,5m

3. Thng s sn trt, hm 1, hm 2, hm 3a. Thng s sn trt dy tng cng 200mm cao -1.000m.

B tng cp C40 (fcu = 40 N/mm2), c modul n hi E = 3,25.107kN/m2Cu kinThng sK hiuGi trn v

Sn trt dy 200mmTnh cht vt liuMaterial typeElastic-


Bc neoLs1,0m

b. Thng s sn hm 1 dy tng cng 200mm cao -4.400m.


Sn hm 1 dy 200mmTnh cht vt liuMaterial typeElastic-


Bc neoLs1,0m

c. Thng s sn hm 2 dy tng cng 200mm cao -7.500m.




Bc neoLs1,0m

d. Thng s sn hm 3 dy tng cng 500mm cao -10.600m.




Bc neoLs1,0m

4. Ph ti mt t (Load surcharge)c im cng trnh xung quanh nh sau: Pha ng Bc : Gip trng hc 5 tng cao cch tng vy 1.5m Pha ng Nam: Gip ng on Vn B Pha Ty Nam : Gip gip nh dn chiu cao tng l 1 Pha Ty Bc : Gip gip nh dn vi chiu cao tng l 1V vy, ti trng cng trnh lin k v thit b thi cng c qui i thnh ti phn b u vi cng ly q = 30kN/m2 v cch mp ngoi tng vy l 1.0m, t su 1.5m so vi mt t t nhin.5. Mc nc ngm trong v ngoi h oDa vo thi gian kho st mc nc ngm(MNN). Mc nc ngm xut hin n nh su 0,31 1,65m v bin i theo tng h khoan . Trong qu trnh tnh ton, chng ti xut ly MNN su 0.5m.

M hnh h o trong Plaxis.IV. M PHNG CC BC THI CNG TRONG PLAXIS1. Thi cng tng vy dy 800mm

2. H nc ngm ln 1 di su 2.600m (cao -3.600m)

3. o t ln 1 xung su 2.100m (cao -3.100m)

4. Thi cng sn trt dy 200mm + lp dng H350x350x12x19

5. Ht nc ln 2 xung su 4.200m

6. o t ln 2 xung su 3.700m (cao -4.700)

7. Thi cng sn hm 1 dy 200mm+ lp dng thanh chng tm H350x350x12x19

8. Ht nc ln 3 n su 7.2m (cao -8.200)

9. o t ln 3 xung su 6.7m (cao -7.700)

10. Thi cng sn hm 2 dy 200mm + lp dng thanh chng tm H350x350x12x19

11. Ht nc ln 4 xung su 10.700m (cao -11.700)

12. o t ln 4 xung su 10.200m (cao -11.200)

13. Lp chng 4 ti su 8.600m (cao -9.600m)

14. Ht nc ln 5 xung di su 12.700m (cao -13.700)

15. o t ln 5 xung su 12.2m (cao -13.200)

16. Lp chng 5 ti su 11.400m (cao -12.400m)

17. H nc ngm ln 6 xung di su 15.1m (cao -16.100)

18. o t ln 6 h thang my xung su 14.8m (cao -15.800m)

V. KT QU NI LC TRONG SN V THANH CHNGSn Cao chng (m)Phn lc F

kN/m

Sn trt dy 200mm-1.000m50.14

Sn hm 1dy 200mm-4.400m308.10

Sn hm 2

dy 200mm-7.500m770.50

Thanh chng 3H350x350x12x19-9.600m247.30

Thanh chng 4H350x350x12x19-12.400m390.73

VI. BIU NI LC V CHUYN V NGANG TNG VY.(Chi tit v chuyn v ngang: xem phn ph lc) Giai on

thi cngBiu bao ni lc v chuyn v

MomentLc ctChuyn v ngang

o t ln 1 su 2.10m

o t ln 2 su 3.70m

o t ln 3 su 6.70m

o t ln 4 su 10.20m

o t ln 5 su 12.20m

VII. TNH THP TNG VY Tnh ton cho tng vy dy 800mm

Kch thc tnh ton bxh = 1000x800mm

Lp bo v a = a'= 75mm, h0 = h a = 80 7.5 = 72.5cm

B tng s dng cp C40 (fcu = 40 N/mm2) c trong dung dch bentnite nnCng tnh ton lyRb =30% x400 = 120kG/cm2; Rbt= 12kG/cm2Cng tnh thp SD390 Rs = kG/cm2 Moment m ln nht

M = -815.85kNm/m = -81585kGm/mMoment dng ln nhtM = 998.71kNm/m = 99871kGm/mLc ct ln nht. Q = 499.62 kN/m = 49962kG/mCng thc tnh ton theo TCXDVN 356-2005: Tnh ((R

Tnh ((R

Tnh (m v ( ; ;

MThp tnh ton FsThp b tr

kGmcm2

-8158532.56

9987140.61

VIII. CHUYN V NGANG V LN CA T XUNG QUANH H O.

Chuyn v ngang

Ln v y tri h oNhn xtQu trnh phn tch nh s h tr ca phn mm Plaxis cho kt qu nh sau

+ Tng vy tng hm vn m bo kh nng chu lc khi thi cng semi top down nh s h tr tch cc ca h ging chng v kingpost.IX. M PHNG TRONG PHN MM ETABS v8.4.8PROCESS IN ETABS SOFTWARE (3D)

1. M hnh cc tng chng (Model in the temporary strut)

Tng trt (Ground floor)

Tng hm 1 (1st basement)

Tng hm 2 (2nd basement)

Cao trnh -9.6m (level -9.6m)

Tng hm 3 (3rd basement)

2. S ti trng (n v kN/m)Tng trt (Ground floor)

Tng hm 1 (1st basement)

Tng hm 2 (2nd basement)

Cao trnh -9.6m (level -9.6m)

Tng hm 3 (3rd basement)

3. Kt qu phn tch m hnh (The analyzing result of model)

Lc dc trc tng trt (Axial force diaphragm of ground strut) (n v kN)

Mt bng gn tn ca h thanh chng v dm trt

Ghi ch (TRT)Thanh chng chu lc ln nhtTnP(kN)M2 (kN.m)M3 (kN.m)

Hnh vung mu H300X200X8X12B349109.2-0.098-0.183

Hnh trn mu hngH350X350X12X19B3204060.504-0.432

Lc dc trc hm 1 (Axial force diaphragm of 1st basement strut) (n v kN)

Mt bng gn tn ca h thanh chng v dm hm 1

Ghi ch (HM 1)Thanh chng chu lc ln nhtTnP(kN)M2 (kN.m)M3 (kN.m)

Hnh vung mu H300X200X8X12B34932.890.013-0.324

Hnh trn mu hngH350X350X12X19B320132.10.492-1.353

Lc dc trc hm 2 (Axial force diaphragm of 2nd basement strut) (n v kN)



Hnh vung mu H300X200X8X12B22719.16-0.017-8.924

Hnh trn mu hngH350X350X12X19B9425.11-0.31-1.448

Lc dc ti cao trnh -9.6m (Axial force diaphragm of level -9.6m) (n v kN)

Mt bng gn tn ca h thanh chng cao trnh -9.6m (level -9.6m)

Ghi ch (cao trnh -9.6m)Thanh chng chu lc ln nhtTnP(kN)M2 (kN.m)M3 (kN.m)

Hnh vung mu H300X200X8X12B42017.420.1890.194

Hnh trn mu hngH350X350X12X19B499181.20.8291.185

Lc dc trc hm 3 (Axial force diaphragm of 3rd basement strut) (n v kN)



Hnh vung mu H300X200X8X12B44317.550.184-3.035

Hnh trn mu hngH350X350X12X19B937205.5-1.770.774

Lc dc trc ca kingpost (Axial force of kingpost H400x408x21x21) (n v kN)

Moment 3 -3 ca kingpost (Moment of kingpost H400x408x21x21) (kN.m)

Moment 2 -2 ca kingpost (Moment of kingpost H400x408x21x21) (kN.m)

Ghi ch King postTnP(kN)M2 (kN.m)M3 (kN.m)

Hnh vung mu H400X408X21X21C10-3266.0300

TNH TON KH NNG CHU LC H THANH CHNG V GINGXem ph lc

1. Ph lc 1: Bng tnh kh nng chu lc ca thanh ging H300x200x8x12

2. Ph lc 2: Bng tnh kh nng chu lc ca thanh ging H350x350x12x193. Ph lc 3: Bng tnh kh nng chu lc ca kingpost H400x408x21x21Kt lun chungQua qu trnh phn tch nh s h tr ca phn mm Plaxis v Etabs, vi nhn xt c rt ra

+ Tng vy tng hm vn m bo kh nng chu lc khi thi cng semi top down nh s h tr tch cc ca h ging chng v kingpost.

+ Kingpost H400x408x21x21 v cc thanh ging kh nng chu lc v n nh. Do , s dng chng khi thi cng cng trnh ny l hon ton hp l.+ Nhn thy lc dc ln nht thanh ging ngang H350x350x12x19 l 41T, do c th dng kch thy lc 150T trong qu trnh thi cng.

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Engineering

Bang tinh tuong vay 04 11 reviewed