. Hinh 4-3 D~p hinh cong dcm giim
10. Tirang eanh h~
thao Iii cua tran) theo tinh toan thUy h,rc (tiOOtoan di~u ti€t Iii h6 chua).
2. Tuang ben (m6 ben)
a. Tac dl./ng: Chiin dAt 2 ben cong trinh, huang dong chay v~ h1;lluu duqcthul1.n, ch6ng xoi cho 2 vai, ch6ng thfun vong quanh biJ ( 2 vai d;1.p),dO-cAu cong thul1.n, ch6ng xoi cho 2 vai, ch6ng thfun vong quanh biJ ( 2 vai d;1.p),dO-cAu cong tac, cua van; d~ b6 tri khe van, khe phai. ..
Cae dl1.p006, khi 2 vai dl1.pla da t6t co th~ dim sau than dl1.pvao 2 vai rna khong d.n b6 tri tuang ben.
b. cau tgo:
- Cao triOOdinh: Xac diOOOOud6i vai d;1.pd~t ho~c co th~ chQn cao han n€ud~ co th~ dong, rna,thao I~p eua van duqc d~ dang. Phful h1;lluu tuang, thuang lam d~ co th~ dong, rna,thao I~p eua van duqc d~ dang. Phful h1;lluu tuang, thuang lam d6e xu6ng d~ n6i ti6p vai tuang cfmh va gifun kh6i IUQIlgxiiy d\IDg.
1
I
- Chi~u dai diOOtuang: chQn sao cho du b6 tri cAucong tac. Khi co cua van cAncM y d~n vi~c dong,rna,thao I~p cua van, cUa phai.
Chi~u day tuang ( tren dinh ): cAn du day d~ b6 tri khe van, khe phai. Thuang d=40 +60cm.
- M~t c~t ngang liang: Tuang ben la ~g tuang ch~ ddt. Tuang c~ ddt trong cong triOOthuy lqi thuang dUngmQt s6 d~g OOuhinh (4-6)
D6i val d~p trQng l\lc, cac tuang ch~n thuang xay rm val bQ ph~ day cong triOO( xay rm val than d~p, san wac, san sau) OOuhiOO(4-6).
Khi l\la chQn lolitituang, din cu vao chi~u cao tuang va tili trQng tren m~t ddt truy~n xu6ng tuang de chQn.
+D~g a: Tuang trQng l\lc
Tuang trQng l\lc thuang duqc xay dgng b~g be tong, da xay, glitchxay. Chi~u rQng day thuang chQnB= (0,5+0,7) H
Tuang trQng l\lc thi cong don giim OOung co kha nang chiu l\lc khong cao, d6ng thm do tuang co kich thuac Ian, nen co kh6i luqng Ian, l\lc truy~n xu6ng n~n lan, doi hoi n~n pMi co suc chiu tai cao.
D~g tuang trQng I\lCthuang duqc su d\lI1gcho cac lolitituang thdp ( thuang H:S 3,Om), tai trQng tren m~t ddt khong Ian.
+D~g b: Tuang cong son
Tuang cong son duqc xay dgng bfmg be tong c6t thep. Tuang co 2 bQ ph~ chiOOla ban day va ban m~t.
Chi~u rQngban day thuang chQnB=(0,5 +0,7) H.
Ban day va ban m~t thuang lam d~g hinh thang, chi~u day Cllam6i ban illy vao chi~u cao tuang va ap l\lc ddt len lung tuang de chQn. Chi~u day hqp Iy la chi~u day sau khi dii tinh toan b6 tri thep cho tuang.
Tuang cong son thi cong kho hon tuang trQng l\lc OOungco kha nang chiu l\lc tuang d6i cao, kh6i luqng khong Ian nen l\lc truy~n xu6ng n~n khong Ian.
D~g tuang cong son thuang duqc su d\lng cho cac lolitituang cao vua ( thuang H =3,0+5,Om).
b
---,/<,I-
Than luang (biin m~l) J% ...!l(. H!l(> LO Ihoat mroe Tfulg Iqc b) ThAnlirang I 'f"A-"A-"A- "~'f'..{o."A- t:G ' ~--~'r-B-,I'tp
2;f!hAn day eOng ldnh -i " Em '21Phanday cOngldnh
Bam am a) c) Ban ch6ng b H bf'A-"k"~ 'r,I' ~
" a2 Philn day cOngldnh
Bm
.Hlnh 4-6. Sa d6 cffu l~o ml)l sod~ng luang chlin dill Hlnh 3-17. Sa d6 cffu1(10ml)l sod~g luang chlin dffl
+D~g c: Tuimg co bim ch6ng (CO1:r\!ch6ng)
Tuimg co bim ch6ng duqc xiiy d\rI1gbfutg be tong c6t thep. Tuimg co 3 bl) ph~n chiOOla bim day, bim m(it va ban ch6ng. Thuimg khoimg (2 +3) m b6 tfi 1 ban ch6ng.
Chi~u fl)ng ban day thuimg ch9n B= (0,5+0,7) H .
M(it c~t ngang cac ban cua tuimg thuimg co d~g chfr OO~t,chi~u day mlii ban my vao chi~u cao tuimg va ap hJc dfrt len lung tuimg d~ ch9n, thuimg t =20 + 30cm.
Vi~c thi~t k~, thi cong tuimg co ban ch6ng d~u kho han tuimg tr9ng hJCva cong son OOungco kha nang chiu hJc cao, ch6ng thfrm vang quanh biYt6t, kh6i IUQ'llg 000,
D~ng tuimg co ban ch6ng thuimg duqc Slr d\lllg cho cac lo~i tuimg cao ( thuimg H>3,0+5,Om).
'.
Cac tuoog tuang d6i cao tra len, cAnb6 tri them thit~tbi thoat nucrc sau lung tuoog d€ giam ap l\Tcnucrc sau lung tuoog, ook dam bao kha nang lin diM cua tuoog oou hiOO(4-6b).