do an thi cong

O AN THI CONG

O AN THI CONG

I.ac iem cong trnh :

Cong trnh xay dng la nha cong nghiep,nha mot nhp mot tang.

Ket cau la mot khung ngang chu lc chnh va he thong dam doc cau tao bang BTCT,o toan khoi.

Dien tch mat bang (16,35 x 114)m nhp nha L=15m.

Chay doc nha co cau tao mot khe nhiet o .

Mong n o bang be tong cot thep toan khoi,tiet dien (2,2 x2,7)m.

II.Nhiem vu thiet ke :

Trong phan o an nay nhiem vu c giao la thiet ke cac bien phap ky thuat va to chc be tong toan khoi cho cong trnh , nh vay nhiem vu chnh trong o an la tm hieu a ra nhng bien phap ve ky thuat cung nh cach thc to chc thi cong uc be tong cho cong trnh. o la nhng cong viec trong giai oan thi cong chnh.

A/THI CONG PHAN AO AT

I.Tnh toan khoi lng at ao :

Mat bang mong n : 2,7 x2,2m

Chieu sau chan mong : 2,4m

V at cap la cap mot nen ta chon m=0,67

c=a+2h x m=3,5 + 2 x 2,4 x 0,67=6,7m

d=b + 2h x m=3 +2 x 2,4 x 0,67=6,2m

Khoi lng at cua mot ho n :

V=h (ab + cd + (a+c)(b+d))/16

=2,4(3 x 3,5 + 6,7 x 6,2 + (3,5 + 6,7) x (3 +6,2))=58,35(m3)

Nha co 19 bc cot ,tc moi ben co 21 cot ,va ca hai ben la 42 cot hay 42 ho mong n ,vay khoi lng at can ao cho toan bo cong trnh la

V=58,35 x 40=2334(m3)

II.Chon phng an ao at va loai may ao :

ac iem ho ao :

-Cap at ao la at cap I.

-Kch thc ho ao : ho ao nong mat bang va phai.

-ieu kien chuyen ch de dang ,khong co chng ngai vat,ch at bang xe tai va mot at e lai mieng ho .

-Khoi lng at ao thap va gii han thi cong va phai.

(Da vao cac yeu to o ta chon may ao gau nghch vi dung tch la 0,65m3

III.ng di chuyen cua may ao :

-Mat bang cong trnh kha ln 114m va chay dai doc theo phng doc nha nen bo tr mot khe nhiet o bc cot th 9.

-ng van chuyen cua may ao doc .Giai quyet khoi lng at tha bang oto o at ,ng oto khoang 2km.Trong tai oto la 4tan tng ng vi so lng gau o la 4m3/1 xe.

Nang suat may ao :

N =(q x Kd x nck x Kthi gian )/Kt

Trong o: q=0,65m3

Kd =1,2:he so ay gau

Kt =1,2

Kthi gian =0,8 :he so s dng thi gian

nck =3600/(tck x Kvt x Kquay )

Trong o : Kvt =1,1 he so phu thuoc ieu kien o at

tck =20(s) vi may EO-4112

Kquay = 1 : He so phu thuoc goc quay

(N =85(m3/h)

B/THI CONG PHAN O BE TONG

I.PHAN T PHAN OAN THI CONG

1/Phan oan :

Theo mat cat cong trnh a cho ,theo yeu cau thiet ke ta tien hanh phan t thi cong nh sau :

-t 1 : T ay mong en mat at .

-t 2 : T mat at en ay vai cot .

-t 3 : gom vai cot ,dam san va ban san.

-t 4 : Cot co vai ,dam ch L.

-t 5 : Cot con lai va dam mai

Theo cach phan t tren ,tien hanh lap ban tnh khoi lng be tong

cho tng t ,can c vao kch thc cac cau kien tren ban ve nh thiet ke.

t Ten cau kien va qui cach n v tnh So cau kien Khoi lng

1 cau kienToan bo

1ay :2.2*2.7*0.4=2.376

Mong :4*1.2*0.9*0.9/3+1.2*0.9*0.4

Cot :0.8*0.9*0.4

Tong cong :M342

42

422.376

1.728

0.28899.79

72.58

12.10

184.47

2Cot t mat nen->ay dam cong son 0.9x0.4x9

Tong cong :

423.24136.08

3*Dam cong son :

0.4x2.95x0.32+0.4x0.9x0.6+1/2x0.6x1.55x0.4

+Dam san :0.15x0.4x5.6

+San :0.08x2.15x5.6

Tong cong :

42

114

380.677

0.336

0.96328.43

38.3

36.6

103.33

4+Cot c2 :0.4x0.9x3

+Vai cot :(0.6x0.2)/2x0.1x0.4

+Dam ch L : (0.4x1x6)+(0.3x0.6x6)

Cot :0.6x0.4x5.6

Tong cong :

42

42

38

421.08

0.032

3.48

0.16845.6

1.34

132.24

7.06

186

5+Cot c3:0.4x0.6x4

+Dam doc :0.3x0.4x5.6

Tong cong :M342

380.96

0.67240.32

25.54

65.86

Sau khi tnh toan c ket qua nh sau :

+Khoi lng be tong t i:184.47

+Khoi lng be tong t II :136.08

+Khoi lng be tong t III :103.33

+Khoi lng be tong t IV : 186.00

+Khoi lng be tong t V : 65.86

Tong cong :

675.74

B.Phan oan :

ay chon nhng phng phap day chuyen e tnh toan.

1.Chon may be tong co dung tch 250 lt NS ky thuat cua may :

e : dung tch may tron =250l

n : so me tron mot gi n=3600/T=3600/115

T : Thi gian e cot lieu vao may thi gian tron va thi gian o be tong ra khoi may tra bang ta co :

T250=115

(

(Nst = Nkt.Kt =5.8x0.8=4.7(m3/h)

Kp :He so thanh phan Kp:0.65(0.72,chon Kp:0.69.

(Nang suat cua mot ca may :

( Nca=ncaxNsd vi nca=8.

( Nca=4.7x8=37.6 m3/ca

2.Xac nh cac thong so day chuyen :

Khi thi cong be tong cot thep ,cot pha ,d be tong va thao d cot pha n=4.

-Chon nhp n chung cua c/d K =1

-Cho 1 ngay ngh lam mot ca A =1

So t o be tong :5 t =>a=5

Thi gian thao cot pha thanh va tiep tuc thi cong tren san t1=2 ngay

-Thi gian thao g cot pha t2=9 ngay

=>So phan oan toi thieu cua moi t la :

Can c vao Nsd=37m3/ca =>so phan oan thi cong t 1 la:

Nh vay ta phai chon nang suat may tron ,hoac so t o be tong , ay so t o be tong .

Tong so cac phan oan o be tong :

Khoi lng be tong trung bnh cua moi oan :

So phan oan t thi cong i :

Lay chan la 5

So phan oan thi cong t II :

Lay chan la 5

So phan oan thi cong t III :

Lay chan la 5

So phan oan thi cong t IV :

Lay chan la 5

So phan oan thi cong t V :

Lay chan la 5

*Phan chia cong trnh tren mat bang ,moi t gom 5 oan .Tong cac phan oan cua cong trnh la : 25 phan oan.

Thi gian thi cong la :

*Tnh so lng cop pha can thiet

+So bo coffa mong can thiet :

*o luan lu cua coffa cot :

+So bo coffa cot cot can thiet :

*o luan lu cua coffa dam san :

+So bo coffa dam san can thiet :

CHON PHNG AN COFFA

Nhan xet rang cac bo phan cua cong trnh can o be tong la nhng cau kien thong thng va n gian ,va lai chieu cao cua cau kien khong ln => Do o e de thi cong va tiet kiem ta s dung coffa luan lu bang go .

THIET KE VAN KHUON

-Dung gong go co khoan cach a=60cm,chon mot loai co tiet dien ln nhat (40cmx90cm)e tnh van khuon.

1.a. chon chieu day van :

-Lc ngang tac dung len tam van khuon ng .

+Tai trong ong do o betong vao van khuon :pd=200kg/m2+Tai trong ngang cua va be tong o dam :

P=(H + pd =2500x0.75+200=2075kg/m2Neu dung van rong b=30cm th lc phan bo tren mot m dai la :

Q=2075x30/100=622.5kg/m

=>Mmax=ql2/8=622.5x602/8x100=2800kgm

Lay d=3cm

1.b.Kiem tra o vong cua van :

Ta dung cong thc :

Ta thay [f]=3*1/1000=0.18>fmax1.c. Tnh gong cot (sn ngang ) :

Cot C1 co tiet dien 40cmx90cm ta chon canh dai e tnh ,lc phan bo tren 1m dai dua gong la :

Q=2075*60/100=1245kg/m

Xem canh dai cua gong la 1 dam n gian goi la cac sn boc kep ,chu tai phan bo eu :

Chon gong co be rong la 5*10cm

Chon kch thc gong la 5*10cm

*Kiem tra o vong cua van :

Ta dung cong thc :

Ta thay [f]=3*1/1000=0.2cm>fmax

2.Tnh van khuon cot C2=>V cot C2 co kch thc nh cot C1 nen ta khong can phai tnh lai

3.Tnh van khuon cot C3Cot C3 co kch thc tiet dien(40*60)cm van khuon cot c chon co be rong b=30cm ,chieu dai d=3cm,gong cot co khoan cach a=60cm,ta can tnh cac gong cot C 3tng t ta co lc phan bo tren moi m dai cua gong cot la :q=1245kg/m.

Tnh lc cho canh dai nhat l=60cm

Mmax=ql2/8=1245x602/8x100=5602kgcm

Vi b=5cm:be rong cua gong =>chon gong kch thc tiet dien la (5*10)cm

4.Tnh van khuon dam san :

4.1.Tnh cho dam co tiet dien (150*400)mm

4.1.1.Tnh van ay :

Tnh theo van khuon nam ,ta chon van co be rong b=15cm=>Lc tac dung len van khuon nam :

+Trong lng be tong tren moi m dai la :

qbt=0.15*0.4*2500=150kg/m

a)Lc ong do be tong o xuong van khuon :200kg/m2

b)Trong lng ngi thi cong : 200kg/m2

c)Lc rung do am may : 130kg/m2=>Tong cong hoat tai :a+b+c=530kg/m2=>Hoat tai phan bo tren mot m dai van khuon la :

qht = 530*0.15=79.5kg/m2=>Tong cong lc phan bo tren 1m dai van ay la :

q=qbt+qht=229.5kg/m

Mmax=ql2/8=229.5*802/8*100=1836kgcm

Chon d=3cm

*Kiem tra o vong cua van

Ta dung cong thc :

F max =5ql4/384*100*EJ=5*229.5*804/384*100*1.2*106*33.75=0.03

Vi J=bh3/12=15*33/12=33.75cm4

E=1.2*106kg/cm


4.1.2.Tnh van thanh:

1.Van thanh : c tnh toan nh van khuon ng,ta chon van co be rong la b=20cm,khoan cach cho cac gong van khuon thanh la 80cm cho thuan tien viec thi cong .

+Lc phan bo tren 1m van :

q=2075*0.2=15kg/m

Mmax =ql2/8=415*802/8*100=3320kgcm

Chon d=3cm


Ta dung cong thc :

F max =5ql4/384*100*EJ=5*415*804/384*100*1.2*106*45=0.04cm

Vi J=bh3/12=20*33/12=45cm4

E=1.2*106kg/cm

Ta thay [f]=3*1/1000=0.225cm>fmax

2.Gong :

Xem gong ngang nh la mot dam n co hai goi ta la hai thanh gong ng co khoan cach la 80 cm chu lc phan bo eu nh van thanh ,ta co lc phan bo tren 1mvan :q=1660kg/m

=>Mmax =ql2/8=1660*802/8*100=1328kgcm

Nh tren ta chon k1ch thc gong ngang la 4*8cm

3.Tnh van san :

Chon van san co be rong b=30cm,ta co :

+Trong lng be tong tren moi m dai la :

qbt=0.08*0.3*2500=60kg/m

+Lc ong do be tong o xuong van san :200kg/m2+Trong lng ngi thi cong :200kg/m2

+Trong lng xe van chuyen ,can cong tac :300kg/m2

+Lc rung do am may :130kg/m2

=>Tong cong hoat tai :830kg/m2=>Hoat tai phan bo tren 1m dai van khuon la :

qht=830*0.3=249kg/m=>Tong cong lc phan bo tren mot m dai van khuon la :

q=qbt+qht=309kg/m

Chon khoan cach gia cac sn ngang e lot van la :80cm.

Mmax=ql2/8=309*802/8*100=2473kgcm

Chon d=3cm


Ta dung cong thc :

Fmax=5ql4/384*100*EJ=5*309*804/384*100*1.2*106*67.5=0.02cm

Vi J=bh3/12=30*33/12=67.5cm4

E=1.2*106kg/cm


4.Tnh kch thc sn ngang :

+Can c theo ket cau cong trnh ,theo be day cua van thanh ,dam san ta thay chieu dai cua thanh sn ngang goi ta len hai dam san se la :

l=2600-(150*3)/2-60=1015mm=1.015m

+Lc phan bo tren thanh sn ngang la lc phan bo tren dien tch (80*101.5)cm.Ta co lc phan bo tren van khuon co be rong 80cm dai 1m la :

q=0.8(200+850)=824kg/m

Mmax=ql2/8=824*101.52/8*100=10611kgcm

Chon chieu rong cua thanh sn ngang la 5cm ta co :

Chon d=10cm


Ta dung cong thc :

Fmax=5ql4/384*100*EJ=5*824*101.54/384*100*1.2*106*416.6=0.02cm

Vi J=bh3/12=5*103/12=416.6cm4

E=1.2*106kg/cm

Ta thay [f]=3*101.5/1000=0.3cm>fmax

5.Tnh cot chong :

-Lc phan bo tren sn doc (tc la dam san )chnh la dien tch cua lc phan bo tren san qua hai thanh sn ngang at vao dam ,can c vao ket qua ta co :

+Lc phan bo tren dien tch cua san (80*107.5)cm la :

q=772.5*1.075=885.8

+Trong lng van san : (1.075*0.8*0.03*800)=20.64kg

Trong lng cua hai thanh sn ngang :2*(1.075*0.05*0.1)*800=8.6kg

=>Tai trong tac dung len sn doc (Dam san)se la :

ps=885.8+20.64+8.6=915kg

Tai trong ban than cua dam san ke ca van khuon la :

Pds=(0.75*229.5)+17.1=189kg(trong o 17.1kg la khoi lng cua van khuon dam san )

=>Tai trong tac dung len cot chong la :

N=ps/2+psd=915/2+189=646.5

Xem oan dam san nam gia hai cot chong la mot dam n co hai goi ta la hai cot chong chu tai trong tap trung N=646.5kg at gia dam t o ta co tai trong truyen len cot chong :P=p/2=646.5/2=323kg.

+Chon cot co tiet dien la 100*100ta co cong thc kiem tra :

Do cot co tiet dien 100*100 nen ta co :

Vi J=bh3/12=833cm4

Vi i=ban knh chuyen hoi

V hai cot chong co sn ngang nen ta coi nh hai au ngam =>chon (=0.65

T (=112=>(=0.244

=>N/(F=323/0.244*100=35.5Tong cong hoat tai :530kg/m2=>Hoat tai phan bo tren mot m dai van khuon la :

qht=530*0.3=159kg/m

Chon khoan cach gia cac a ngang e ay dam la 80cm

Mmax=ql2/8=909*802/8*100=7272kgcm

Vi J=bh3/12=67.5cm4E=1.2*106kg/cm


1.2.Tnh van thanh :

Tnh toan nh van huon ng ,ta chon van co be rong la b=30cm day 3cm,khoan cach cho cac ngong ngang lay la 56cm,khoan cach cac chong ng lay bang 80cm ta co :

+Lc phan bo tren mot m dai van :

q=2075*0.3=622kg/m

Mmax =ql2/8=622*402/8*100=1244kgcm

Chon d=3cm


Ta dung cong thc :

Fmax =5ql4/384*100*EJ=5*622*404/384*100*1.2*106*67.5=0.085cm

Ta thay [f]=3*40/1000=0.195cm>fmax

1.3.Tnh gong ng :

Xem gong ng nh mot dam n chu lc phan bo eu tren dien tch (40*50)cm ta co :

+Lc phan bo tren mot m van rong 50cm:q=0.4*2075=830kg/m

=>Mmax=ql2/8=830*502/8*100=2593kgcm

Nh tren ta chon kch thc gong la (4*6)cm

1.4Tnh gong ngang :

Xem gong ngang nh mot dam n co hai goi ta la hai thanh gong ng co khoan cach la 40cmchu lc phan bo deu nh van thanh :

=>Mmax=ql2/8=622*802/8*100=4976kgcm

Nh tren ta chon kch thc gong ngang la:5*10cm

2.Tnh cho dam n 2:

Dam n hai co kch thc 300x600 cm,vi cach tnh tng t ta co ket qua thiet ke van khuon nh sau :

+van ay co be rong b=30cm,be day d=3cm

+Van thanh co be rong b=30cm,be day d=3cm

+Gong ng :4x6cm

+Gong ngang :4x6cm

3.Tnh cot chong cho dam n 1+2:

-Khoang cach gia hai cot chong bang 80cm

-Xac nh lc tac dung len moi au cot chong :

Ta xem hai cot chong la hai goi ta cua mot dam n co l=80cm tai trong tac dung len dam gom :trong lng ban than dam qui ra lc phan bo eu :

+Lc phan bo tren mot m dai dam (400x1000)mm la : 909kg/m

+Trong lng cua van khuon gom van ay ,van thanh ,gong ng ,gong ngang :

(0.3*0.04*800)+(1*0.03*800*2)+0.04*0.06*800)+0.05*0.1*1*800*6)

=9.6+48+16+15.36=88.96kg/m

=>Dam chu lc phan bo eu q=909+88.96=997.96kg/m

=>Tai trong tac dung len cot chong la :

N=q*1/2=997.96*0.8/2=400kg

+Chon cot chong co tiet dien la 80*80

.kiem tra kieu kien on nh ta co

Vi J+b*h3/12=8*83/12=341cm4

=>(=(l/i=0.65*4/2.3=1.13

T (=1.13=>(=0.99

Kiem tra dieu kien :N/(F=400/0.99*64=6.3lTa chon cot chong co tiet dien (80*80)mm

IIITNH VAN KHUON DAM DOC (300*400):

Tnh van khuon dam doc ta tien hanh cach tnh toan tng t nh tnh toan cac dam n ket qua :ta chon van ay day 3cm,be rong b=30cm,gong ng ,gong ngang co kch thc (4x6)cm,khoan cach cac cay chong la 80cm,cay chong co kch thc tiet dien la 8x8cm.

TRNH T THI CONG

A.Thi cong coffa Cot Thep

1.PHAN GIA CONG :

1.Gia cong coffa :Coffa c gia cong tai lan trai ,hoac phan xng (neu co )tai o co trang b cac thiet b dung cu may moc chuyen dung nh may ca bao ,cat Can c vao ban ve thiet ke ,cong nhan tien hanh cat ghep tng tam coffa thanh tng thanh tng tam ,thanh cac hop cot ,dam neu chung co kch thc nho ,hoac ghep coffa tai hien trng neu chung co kch thc ln .

-Khi ca ,cat ,gia cong coffa phai chu y tnh toan chnh xac ,neu can thiet phai em lap dng th goai hien trng trc khi tien hanh san xuat hang loat .

2.Gia cong Cot Thep :Tng t nh coffa,cot thep c lam t lan trai roi van chuyen en cong trng e lap ghep ,khi gia cong cot thep phai chu y en kch thc cua coffa,khoan cach be tong tht ,cho giao nhau cua cot thep trong cac cau kien ma lam cho thch hp .Thong thng khi phai uon cot thep ta phai tien hanh uon th tai cong trng nhng thanh thep can phai uon.Neu at yeu cau mi co the gia cong hang loat c .Mot chu y na la cot thep cua cau kien nao th phai ghi ro e khi bo buot van chuyen khong b nham lan ,khi lap rap phai ghi so lng thanh hang 1 cau kien tng ng cua no trong ban ve ,ng knh ,chieu dai ,hnh dang cua no khi lap rap c chnh xac mau chong .

I.PHAN LAP DNG

1.oi vi cot :au tien phai lay tim cot (dung day cang hoac may kinh v )theo hang doc va hang ngang .Nhat thiet hang tim cot hang doc phai vuong goc vi ng tim cot hang ngang .Sau khi co kch thc nho th dng cot thep trc ,dng coffa sau .neu cot co kch thc ln th dng coffa 3 mat kn,con mot mat h e gia cong cot thep .Khi dng coffa th mat trong cua cot cung phai lay tim cot cua ca hai phng .Lap dng sau cho tim cua hop cot trung vi dau tim tren co cot hoac co mong .Tien hanh co nh chan cot ,dung day hoac hoac may chnh hop cot ,theo ca hai phng ng .Co dnh cot bang cay chong (5x10)cm chang han hoac bang van chang .Neu cot cao hn 2m th can phai co hai lp cay chong cho cot ,chu y khi dng hop cot thg phai co nh tam hop cot bang inh sau o dung gong cot e kieng lai vi khoan cach qui nh (60cm).Sau khi lap dng xong tien hanh lan cuoi ,va cuoi cung la ti nc hop cot roi don ve sinh mat co cot ,mong e o be tong .

2.oi vi dam ,san dam mai :

-Sau khi tien hanh uc be tong cot xong ,ta tien hanh dng coffa dam ,san e tien hanh dng coffa dam,san .Ta phai biet cao o cua no va phai anh dau vao than cot dung ong nc e can ni vo hoac dung may thuy bnh e xac nh cao o cua dam tren toan cong trnh .Sau o giang day va dng cac cot chong theo day ,co nh tam cac cot chong ,rai van ay dam ,dung nem chan cot e ieu chnh cao o cua van ay dam .Di chan cot phai co van lot ,nem ,at nen phai c am chat ,bang phang e tranh lun khi o be tong .Khi co van ay dam th tien hanh dng san cong tac e thi cong cot thep dam ,khi thi cong cot thep dam can phai lam gia cot thep cao hn van ay mot khoan ln hoac bang chieu cao dam ,rai cac cot thep doc ,long cac cot ai ,lay dau tren cot doc ,va rai cot ai theo dau .Cot doc nam tren th gi tren gia ,con cot doc nam di th ha xuong ay dam tien hanh buoc hoac han cot ai ,chu y khi buoc hoac han phai gi cot ai cho thang ng vuong goc vi phng cua cot doc buoc cot ai chac chan tranh xoc xech .

-Sau khi lap rap cot thep ta tien hanh ghep coffa thanh ,co nh tam van thanh bang cac bo tren mieng dam va bang cac c at trong long cua dam ,sau o dung cac gong ng va cac gong ngang co nh chac chan van thanh dam .

-Lap dng coffa dam xong tien hanh kiem tra cao o ,kch thu7c khoan h gia cac cho giao nhau cua dam neu a tien hanh raicoffa san .

-Coffa san kiem tra cao o ay san ,tr i be day cua van san tien hanh lay cao o a ngang san ,cung dung ong ni vo hoac may thuy bnh e lay cao o cua a san tren toan bo cong trnh sau o tien hanh chong cac a ngang nh tren .Co nh cac cot chong xong tien hanh rai van san .

Lap cot thep san : Ghep coffa san xong ,quet don lam ve sinh mat van ,dung giay tole e bt cac khe h tren mat van ,sau o lay dau xong tien hanh rai cot thep san lp di rai trc ,lp tren rai en au th tien hanh buoc hoac han en o .Khi tien hanh cot ,buoc phai lam theo hng lui ve sau e tranh dam ap len thep san a thi cong .Cot thep chu momen am phai c gia co rat chac chan ,khi buoc cot thep phai chnh khoan cach gia cac thanh theo ung qui nh .Cot thep san khi rai phai co gang lam cho thep phai cang ,thang .

-sau khi lap cot thep san xong phai lam cac cau cong tac e van chuyen va be tong tranh dam ap trc tiep len cot thep .

B.Thi cong be tong :

1.Yeu cau vat lieu :

a) a : a phai ung kch c ,phai c ra sach khong c dnh at ,bai cha a phai co nen cng e xuc va van chuyen .

b) Cat : Cat e o be tong phai la cat to ,sach ,t lan cac tap chat .

c) Nc :nc e tron be tong dung nc sach ,khong man khong nhiem phen ,khong nhiem chat xam thc .

d) Xi mang :ung mac qui nh ,con nguyen bao ,mi ra lo ,tot nhat la a c tren 15 ngay .Nhng khong qua 90 ngay ,bao ximang phai con mem khong ong cuc .

IIYeu cau oi vi be tong :

a) Lieu lng pha tron cho mot me be tong phai ung qui nh .

b) Be tong sau khi tron xong phai eo ,ung o sut thiet ke ,khong nen o nhieu nc khi o be tong.

c) uc tng mau o cho tng to be tong ,ghi ro ngay thang uc mau .

III.Qui trnh o be tong :

a) Be tong c tron tai cong trnh :dung xe rua ,xe cut kt e a cot lieu vao trong may tron ,xe phai co mc anh dau ve khoi lng e kiem tra viec can ong lng vat lieu cho tng me tron be tong .

b) Be tong tron xong c van chuyen bang xe nho chua cac thung cha be tong hoac bang loai xe cau t hanh .

c) Be tong khi o khoai thung cha c cong nhan bang ra bang cuoc ,cao,xeng , theo cac c qui nh c anh dau san ,sau khi bang be tong phai tien hanh am .Neu o cot th ta am bang dui ,o san th dung am ban ,am xo ,bua go ,am ngang .o ti au th am ti o ,o be tong theo hng lui ,be mat be tong phai can co th co kinh nghiem ,dung cac thc bang can cho phang .

d) Trong thi gian o be tong phai co giam sat ky thuat thng xuyen e x ly cac s co va e kiem tra cac kch thc cua coffa,cot thep kp thi .

IV.Qua trnh bao dng be tong :

a) Sau khi o be tong xong khong c i lai ,lam chan ong gay anh hng khoi be tong va o.24 gi sau khi o be tong th phai tien hanh ti nc bao dng ,thi gian bao dng lien tuc trong 7 ngay ,oi vi san be tong phai co bien phap che phu be mat tranh boc hi nc qua nhanh ,nh dung cac ,mat ca ,vo bao xi mang ay lai .

b) sau khi be tong c hai ngay th tien hanh thao d coffa thanh ,loai nao lap sau th thao trc ,khi thao coffa phai dung xa ben cay them ,khong c ap,uc lam anh hng chat lng be tong,thao coffa xong phai cao sach va be tong dnh vao coffa ,nho inh va van chuyen ve lan trai e gia co lai hoac cat gi .

V.Bien phap an toan phong hoa :

a) Khi thi cong mot cong trnh can phai chu y :an toan lao ong la tren het ,nen trong qua trnh thi cong phai kiem tra :gian giao ,san cong tac ,thang leo ,lancan bao ve .Tat ca phai c gia co ky cang chac chan

b) ien dung trong cong trnh phuc vu thi cong phai c bo phan ky thuat chuyen mon kiem tra thng xuyen ,khong c lam trot vo au mac tum lum ,lon xon cac thiet b dung ien phai c kiem tra ky va thng xuyen trc khi a ra cho cong nhan s dung.

c) Cong nhan khi i vao cong trnh phai oi non bao ho ,khi lam viec tren cao phai mang day an toan ,phai co mot to an toan lao ong thng xuyen i nhac nh anh em cong nhan .

d) nhng ni de xay ra chay no nh kho xang dau ,trai ca trai cay ,can phai co bnh cu hoa ,may bm hoat ong tch cc 24/24h.Khong cho cong nhan hut thuoc tai nhng ni o ,can co bang thong bao ,nhac nh nhng cong nhan ve hoa hoan tieu lenh cha chay nhng ni co cong nhan lam viec nhieu

Cong tac Khoi lng

nh mc

So cong thc hien

Thi gian thc hien

So lng cong nhan

B.TC.TC.PC.TB.TT.DC.PC.TB.TT.DC.PC.TB.TT.DC.PC.TB.TT.D

Betong mong t 1-P.118.541.9981.6611.320.9960.66431231812121130152020

Betong mong t 1-P.218.541.998

312318121211


251815101111


18141171111


251815101111

Be tong cot C1t 2-P.116.203.2404.038.842.4151.61652739262221

Be tong cot C1t 2-P.216.203.240

652739262221

Be tong cot C1t 2-P.312.962.592

522231212221

Be tong cot C1t 2-P.49.721.944

391623161111

Be tong cot C1t 2-P.512.962.592

522231212221

Be tong t 3-P.116.552.8603.10510.041.8631.242512931212221

Be tong t 3-P.215.852.753

492830202221

Be tong t 3-P.312.412.162

392223151111

Be tong t 3-P.411.371.933

351921141111

Be tong t 3-P.512.412.162

392223151111

Be tong t 4-P.112.982.5964.02510.042.4151.61522631212221

Be tong t 4-P.212.522.504

502530202221

Be tong t 4-P.39.841.968

402024161111

Be tong t 4-P.48.501.700

341721141111

Be tong t 4-P.59.841.968

402024161111

Be tong t 5-P.17.941.5884.02510.042.4151.61321619131111

Be tong t 5-P.27.701.540

311519121111

Be tong t 5-P.36.071.214

241215101111

Be tong t 5-P.45.141.028

21101281111

Be tong t 5-P.56.071.214

241215101111

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