... ta, thtfhng dung CQC tre, train the0 m$t do trung binh 25 cQc/M2, 4 80 - lOOMM vdi chi& dii 2,50m cho c~c tre vi 4 - 5m cho CQC tram. d- Phuwag ph&p dign va nhigt : ... cach xlly v6m cu6n da khi 1 < 4M hoflc d8m b(t6ng cSt thkp khi 1 < 6M1 ddng thdi k&t hqp dd chju tuhg b6n trbn. (Hinh 2-91. 1-2 : 4 deng : GIii phap m6ng tren gikng ... ddt n6n chiu tii 6 shu. Kich thudc cia d$t b$c vdi chi6u ngang td 15 - 30cm, chi6u cao t3 40 - 50cm tiiy the0 v$t lieu cdu tao mhg, vdi m6ng b@t,bng thi 35 < 'n < looCM...