16.Trinh bay cau tao san btct ban lap ghep

Loai san nay dc cau tao voi 1 so bo phan che tao san,co the chua duoc lam hoan chinh,co chua cot thep or phan tuong de lien ket,va 1 so bo phan tien hanh duc lien khoi tai hien truong.Cau tao ban lap ghep vua dam bao tinh chat toan khoi tot,vua bao dam lien ket chat che va de dang giua cac bo phan lap ghep.Giam bot dc phan nao tinh chat phuc tap cua thi cong duc tai cho va thich hop trong dieu kien co gioi hoa xd chua cao.

a.)San day suon chen gach rong

Bo phan chiu luc chinh cua san la Dam va Ban dc duc tai cho,gach rong lam khoi chen giua suon dc duc san,kich thuoc dam suon tuy thuoc kich thuoc gach chen,vien gach rong co the tao them go de tang kha nang lien ket giua be tong va gach.Mat tran san bang phang,co the trat vua truc tiep ma k can lam tran treo.Tho cong van khuon don gian va tiet kiem dc go van.San co kha nang cach am,cach nhiet cao,dung trong benh vien,nha o.Tham so kich thuoc cau tao:

-Be day san : 16cm voi gach 12cm,20cm voi gach 15cm,25cm voi gach 20cm(chua ke cau tao nen san va tran san)

-Dam suon:Nhip dc chon trong khoang 4-6cm tuy theo be day cua san.K cach giua cac dam suon tuy thuoc vao gach chen,25-80cm,pho bien 33-40cm.Be rong b' cua dam suon >=7cm.Be day cua ban san 4-6cm.

b.)San day suon duc san.

Suon gom cac dam hinh chu T duoc duc san o nha may hoac o hien truong va sau do dem den lap dung vao vi tri de tiep tuc duc ban san tai cho.

Tuy theo cau tao ma tren moi suon co chua cach khoang 100cm cac lo rong de cau tao goi tua do van khuon duc ban,hoac dat cac tam be tong hay gach rong se chon bo trong than san de lam khuon duc ban san.Hai dau dam suon co de thep cho lien ket vao giang tuong hoac dam chinh chiu san,dong thoi co chon truoc vao da duoi dam suon nhung thoi go de cang luoi thep hoac dong lati to vua cau tao mat tran san.Loai san nay tiet kiem go chong van khuon.Thi cong nhieu phuc tap vi tren hien truong phai to chuc cung luc qua trinh lap ghep va be tong toan khoi.Tham so kich thuoc dam suon:

Nhip dam l:3,2-4m.Chieu cao h:1/20l - 1/25l.Be rong b':6-10 cm.Khoang cach giua cac dam suon tuy thuoc gach chen;33-120cm.