Thuyt minh n thi cngc b tng b nc ngmChng 1: thi cng o tPhng n o tThi gian thi cng 2 thng khi lng thi cng kh nhiu, chiu su o mng nng nn chn phng n thi cng bng my o c gii, y chn phng n o bng my o gu xp dc mi o:Loi t cp III, t bng Phn loi t theo thi cng c gii, tra bng ta bit c y l loi t st ln cui si t st rn chc, ng thi chiu su o t h=1.2m tra bng ta c m=0Chn my o tChn khong trng t thi cng dng vn khun 1.7mChiu rng y h mng(theo hnh v)

Chiu rng trn h mng:

Chiu di y h o:

Chiu di trn h mng:

S di chuyn my o

Yu cu chn my o:Khong cch trc my n mp h o :2.5m Bn knh h o: R>=5.4+2.5=7.9mBn knh t su o t Hd>=h+a=1.2+1.2=2.4m vi a l cao trnh my ng n trc myVi cc yu cu trn da vo catalo my o gu xp, chn gu xp bnh xch HITACHI UH 07.3 vi cc thg s k thut nh sau:

Dung tch gu:

Tm vi xa nht :

Chiu cao :

Chiu su o:

Thi gian 1 chu k vi gc quay 90 : Tnh nng sut my o:

Trong :Kd: h s y gu, ng vi cp t III th Kd=1.1-1.2 . chn Kd=1.1Kt: h s lm ti ca t,vi cp t III th Kt=1.24-1.32 chn Kt=1.3

Nch: s chu k trong 1 gi:

Kquay: h s ph thuc gc quay ca cn vi my o, y gc quay nh hn bng 90 nn K quay=1Kvt: h s ph thuc t ln thng xe ch: y ly 1.1

Ttg: h s s dng thi gian: chn Ttg=0.7Vy nng sut my o:

Th tch t o:

Thi gian o cn thit:

Xc nh th tch t em i :Th tch b tng lt:

Th tch b tng phn y v thnh b:Din tch mt ct ngang y v thnh:

Th tch btong vch ngn:

Th tch b tng phn mng:

Th tch b tng ct:

Th tch btng king

Th tch b tng di mt t:

t cp 3 c h s trng n: 0.3Th tch t cn l:

Chng 2: chia t phn on thi cngTrnh t thi cng chia thnh 2 tPhn 1: Thi cng b ncBetng lt dy 100mm v b tng y b 250mmThnh b ln 1 cao 0.85mThnh b ln 2 cao 2mThnh b ln 3 cao 1.9m v cng xnPhn 2: thi cng h ging5 mng n 1m x 1.2mCt cao 0.65m king diCt trn cao 1.2mDm ngang ging dc giaCt cao tip 1.2mDm ngang ging dc trnCt cn li 1.15mChng 3: Tnh ton khi lng btng, cp pha v ct thpPhn 1: Thi cng b nct 1: Betng lt dy 100mm v b tng y b 250mmTh tch b tng lt:

Th tch b tng y b:

Khi lng ct thp y b:Din tch ct pha:

t 2: Thnh b ln 1 cao 0.85mTh tch b tng tng

Th tch cch ngn:

Din tch cp pha tng:

t 3: Thnh b ln 2 cao 2mTh tch b tng tng

Th tch cch ngn:

Din tch cp pha tng:

din tch thp:t 4: Thnh b ln 3 cao 1.9m v cng xnTh tch b tng tng

Th tch cch ngn:

Th tch cng xn:

Tng th tch:

Din tch cp pha tng:

din tch thp:Phn 2: thi cng h ging:t 1: 5 mng n 1m x 1.2mTh tch b tng:

Din tch cp pha mng:

t 2: Ct cao 0.65mTh tch b tng:

Din tch cp pha ct:

t 3: king diTh tch b tng:

Din tch cp pha king:

Din tch thp:t 4: Ct trn cao 1.2mTh tch b tng:

Din tch cp pha king:

t 5: Dm ngang +ging dc giaTh tch b tng:

Din tch cp pha:

t 6: Ct trn cao 1.2mTh tch b tng:

Din tch cp pha:

t 7: Dm ngang ging dc trnTh tch b tng:

Din tch cp pha:

t 9: Ct cn li 1.15mTh tch b tng:

Din tch cp pha:

Chng 4: tnh ton v chn vn khun:La chn cp pha nha fuvi lm h cp pha chnh cho cng trnh vi cc c tnh nh l cp pha nha bn cao ,nh , chng va p v nh nhs mt tri, kch thc ch to rt chnh xc