{"id":2438,"date":"2020-02-06T13:11:58","date_gmt":"2020-02-06T13:11:58","guid":{"rendered":"https:\/\/thuvienxaydung.com.vn\/?p=2438"},"modified":"2020-02-06T13:28:33","modified_gmt":"2020-02-06T13:28:33","slug":"cach-tinh-khoi-luong-be-tong-tat-ca-cac-cau-kien","status":"publish","type":"post","link":"https:\/\/tailieuxaydung.net\/?p=2438","title":{"rendered":"C\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng t\u1ea5t c\u1ea3 c\u00e1c c\u1ea5u ki\u1ec7n"},"content":{"rendered":"

C\u00c1CH T\u00cdNH KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG T\u1ea4T C\u1ea2 C\u00c1C C\u1ea4U KI\u1ec6N<\/strong><\/h2>\n
<\/div>\n

I. M\u1ee4C \u0110\u00cdCH C\u1ee6A VI\u1ec6C\u00a0T\u00cdNH KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG<\/strong><\/h3>\n

N\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng trong c\u00e1c h\u1ea1ng m\u1ee5c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng r\u1ea5t quan tr\u1ecdng, gi\u00fap ch\u00fang ta t\u1ef1 tin gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c nhi\u1ec1u c\u00f4ng vi\u1ec7c trong l\u0129nh v\u1ef1c x\u00e2y d\u1ef1ng c\u00f4ng tr\u00ecnh, c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n

1. Th\u00e0nh th\u1ea1o c\u00e1ch \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng \u0111\u1ec3 ph\u1ee5c v\u1ee5 c\u00f4ng t\u00e1c l\u1eadp D\u1ef1 to\u00e1n c\u00f4ng tr\u00ecnh, \u0111\u00e2y \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t trong nh\u1eefng m\u1ee5c \u0111\u00edch quan tr\u1ecdng nh\u1ea5t.<\/p>\n

2. Ki\u1ec3m tra \u0111\u01b0\u1ee3c kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng sai kh\u00e1c gi\u1eefa B\u1ea3n v\u1ebd thi\u1ebft k\u1ebf v\u00e0 d\u1ef1 to\u00e1n \u0111\u01b0\u1ee3c duy\u1ec7t; kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng th\u1eeba thi\u1ebfu gi\u1eefa h\u1ed3 s\u01a1 thi\u1ebft k\u1ebf v\u00e0 ti\u00ean l\u01b0\u1ee3ng M\u1eddi th\u1ea7u.<\/p>\n

>> Xem th\u00eam : B\u00e1o gi\u00e1<\/p>\n

3. B\u00f3c kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng \u0111\u1ec1 ph\u1ee5c v\u1ee5 k\u1ebf ho\u1ea1ch d\u1ef1 tr\u00f9 v\u1eadt t\u01b0, t\u00ednh to\u00e1n c\u00e2n \u0111\u1ed1i \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u ph\u1ee5c v\u1ee5 thi c\u00f4ng; \u0111\u1ea3m b\u1ea3o c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd, \u0111i\u1ec1u h\u00e0nh thi c\u00f4ng x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3, ch\u00ednh x\u00e1c v\u00e0 ti\u1ebft ki\u1ec7m nh\u1ea5t..v..v\u2026.<\/p>\n

 <\/p>\n

\"C\u00e1ch<\/p>\n

__ T\u00e1c gi\u1ea3 b\u00e0i vi\u1ebft l\u00e0 ng\u01b0\u1eddi c\u00f4ng t\u00e1c l\u00e2u n\u0103m trong l\u0129nh v\u1ef1c d\u1ef1 to\u00e1n. T\u00e1c gi\u1ea3 d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u00e3 r\u1ea5t th\u00e0nh c\u00f4ng trong vi\u1ec7c \u0111\u1ea5u th\u1ea7u, tham gia\u00a0b\u00e1o gi\u00e1 x\u00e2y nh\u00e0 d\u1ef1ng tr\u1ecdn g\u00f3i,\u00a0b\u00e1o gi\u00e1 x\u00e2y d\u1ef1ng nh\u00e0 x\u01b0\u1edfng<\/a>,\u00a0b\u00e1o gi\u00e1 x\u00e2y qu\u00e1n cafe,\u00a0b\u00e1o gi\u00e1 x\u00e2y nh\u00e0 th\u00e9p ti\u1ec1n ch\u1ebf<\/p>\n

II. C\u00c1C L\u01afU \u00dd KHI T\u00cdNH\u00a0KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG<\/strong><\/h2>\n

C\u00f4ng t\u00e1c \u0111o b\u00f3c \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3 theo Quy\u1ebft \u0111\u1ecbnh s\u1ed1 788\/Q\u0110-BXD ng\u00e0y 26\/8\/2010 v\u1ec1 vi\u1ec7c c\u00f4ng b\u1ed1 H\u01b0\u1edbng d\u1eabn \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng x\u00e2y d\u1ef1ng c\u00f4ng tr\u00ecnh.<\/p>\n

Ngo\u00e0i ra khi l\u1eadp d\u1ef1 to\u00e1n, c\u00e1c h\u01b0\u1edbng d\u1eabn \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng c\u00f2n n\u1eb1m \u1edf thuy\u1ebft minh c\u00e1c ch\u01b0\u01a1ng v\u1ec1 B\u00ea t\u00f4ng trong quy\u1ec3n \u0111\u1ecbnh m\u1ee9c \u00e1p d\u1ee5ng (VD: Thuy\u1ebft minh ch\u01b0\u01a1ng VI \u2013 \u0110M 1176 \u2013 \u0110\u1ecbnh m\u1ee9c ph\u1ea7n x\u00e2y d\u1ef1ng)<\/p>\n

Theo c\u00e1c v\u0103n b\u1ea3n tr\u00ean c\u00f9ng v\u1edbi kinh nghi\u1ec7m th\u1ef1c t\u1ebf, mu\u1ed1n l\u01b0u \u00fd th\u00eam c\u00e1c b\u1ea1n m\u1ed9t s\u1ed1 \u0111i\u1ec3m khi \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng nh\u01b0 sau:<\/strong><\/p>\n

1.\u00a0C\u00f4ng\u00a0th\u1ee9c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng\u00a0b\u00ea t\u00f4ng c\u1ea7n tr\u00ecnh b\u00e0y theo khu\u00e2n m\u1eabu.<\/strong><\/p>\n

    \n
  • C\u1ea5u ki\u1ec7n b\u00ea t\u00f4ng d\u1ea1ng l\u1eadp ph\u01b0\u01a1ng:<\/li>\n<\/ul>\n

    Vbt = S\u1ed1 l\u01b0\u1ee3ng c\u1ea5u ki\u1ec7n * Chi\u1ec1u\u00a0 d\u00e0i * R\u1ed9ng * Cao<\/em><\/strong><\/p>\n

      \n
    • V\u1edbi c\u1ea5u ki\u1ec7n ph\u1ee9c t\u1ea1p kh\u00e1c:<\/li>\n<\/ul>\n

      Vbt = Di\u1ec7n t\u00edch m\u1eb7t b\u1eb1ng c\u1ea5u ki\u1ec7n * Chi\u1ec1u cao<\/em><\/strong><\/p>\n

      Di\u1ec7n t\u00edch m\u1eb7t b\u1eb1ng c\u1ea5u ki\u1ec7n: Chia v\u1ec1 nh\u1eefng h\u00ecnh \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 t\u00ednh di\u1ec7n t\u00edch cho d\u1ec5 sau \u0111\u00f3 t\u1ed5ng h\u1ee3p l\u1ea1i.<\/p>\n

      V\u00ed d\u1ee5: C\u1ea5u ki\u1ec7n B\u00ea t\u00f4ng c\u00f3 k\u00edch th\u01b0\u1edbc nh\u01b0 sau: Cao: 1,5m; m\u1eb7t b\u1eb1ng \u0111\u00e1y g\u1ed3m\u00a0 h\u00ecnh Ch\u1eef nh\u1eadt v\u00e0 H\u00ecnh thang gh\u00e9p th\u00e0nh, trong \u0111\u00f3:<\/p>\n

      H\u00ecnh ch\u1eef nh\u1eadt: C\u1ea1nh ng\u1eafn 1,2m, D\u00e0i 2m;\u00a0\u00a0 H\u00ecnh thang. \u0110\u00e1y l\u1edbn 2m, \u0111\u00e1y nh\u1ecf 1,4 m; chi\u1ec1u cao 0,8m; c\u00f4ng th\u1ee9c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau:<\/p>\n

      Vbt = ((1,2*2+(2+1,4)*0,8\/2))*1,5= 5,64 m3<\/p>\n

      L\u01b0u \u00fd: C\u00f4ng t\u00e1c b\u00ea t\u00f4ng \u0111\u01b0\u1ee3c n\u1eb1m r\u1ea3i r\u00e1c trong c\u00f4ng tr\u00ecnh n\u00ean c\u1ea7n t\u00ednh to\u00e1n c\u1ea9n th\u1eadn, t\u1ec9 m\u1ec9 tr\u00e1nh sai s\u00f3t, thi\u1ebfu kh\u1ed1i l\u01b0\u1ee3ng.<\/em><\/p>\n

      2. B\u00f3c ph\u1ea7n\u00a0b\u00ea t\u00f4ng kh\u00f4ng tr\u1eeb th\u00e9p hay d\u00e2y bu\u1ed9c chi\u1ebfm ch\u1ed7:<\/strong><\/p>\n

      \u0110\u01b0\u1ee3c n\u00f3i trong thuy\u1ebft minh ch\u01b0\u01a1ng VI \u2013 \u0110M 1176 ho\u1eb7c \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh t\u1ea1i m\u1ee5c 3.3 ph\u1ea7n II trong Quy\u1ebft \u0111\u1ecbnh 788\/2010\/BXD ng\u00e0y 26\/8\/2010 c\u1ee7a B\u1ed9 X\u00e2y d\u1ef1ng<\/p>\n

      Nhi\u1ec1u b\u1ea1n \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 l\u1eadp D\u1ef1 to\u00e1n xong l\u00ean Ch\u1ee7 \u0110\u1ea7u t\u01b0 b\u1eaft tr\u1eeb \u0111i th\u1ec3 t\u00edch c\u1ed1t th\u00e9p chi\u1ebfm ch\u1ed7 trong B\u00ea t\u00f4ng m\u00e0 kh\u00f4ng bi\u1ebft l\u00e0m sao \u0111\u1ec3 gi\u1ea3i tr\u00ecnh; b\u00e2y gi\u1eddi th\u00ec c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 tin b\u1ea3o v\u1ec1 s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh r\u1ed3i nh\u00e9.<\/p>\n

      Tuy nhi\u00ean khi l\u1eadp h\u1ed3 s\u01a1 thanh quy\u1ebft to\u00e1n c\u00e1c b\u1ea1n c\u0169ng c\u1ea7n ch\u00fa \u00fd: V\u00ec l\u00e0 kh\u00f4ng tr\u1eeb th\u00e9p chi\u1ebfm ch\u1ed7 n\u00ean nhi\u1ec1u khi kh\u1ed1i l\u01b0\u1ee3ng v\u1eefa b\u00ea t\u00f4ng trong th\u1ef1c t\u1ebf d\u00f9ng \u00edt h\u01a1n nhi\u1ec1u, \u0111i\u1ec1u n\u00e0y ko \u1ed5n n\u1ebfu b\u1ea1n xu\u1ea5t tr\u00ecnh h\u00f3a \u0111\u01a1n ch\u1ee9ng t\u1eeb khi quy\u1ebft to\u00e1n, nguy\u00ean t\u1eafc h\u00f3a \u0111\u01a1n v\u1eabn ph\u1ea3i ghi kh\u1ed1i l\u01b0\u1ee3ng trong d\u1ef1 to\u00e1n \u0111\u01b0\u1ee3c duy\u1ec7t, n\u00ean c\u00e1c b\u1ea1n ph\u1ea3i n\u1eafm ch\u1eafc \u0111\u1ec3 t\u00ecm c\u00e1ch h\u1ee3p th\u1ee9c h\u00f3a \u0111\u01a1n ch\u1ee9ng t\u1eeb tr\u01b0\u1edbc khi thanh quy\u1ebft to\u00e1n.<\/p>\n

      3<\/strong>.\u00a0B\u00f3c ph\u1ea7n\u00a0b\u00ea t\u00f4ng ph\u1ea3i tr\u1eeb \u0111i c\u00e1c khe co gi\u00e3n, l\u1ed7 r\u1ed7ng tr\u00ean b\u1ec1 m\u1eb7t k\u1ebft c\u1ea5u b\u00ea t\u00f4ng c\u00f3 th\u1ec3 t\u00edch > 0,1m3.<\/strong><\/p>\n

      V\u1ea5n \u0111\u1ec1 n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c n\u00f3i thuy\u1ebft minh ch\u01b0\u01a1ng VI \u2013 \u0110M 1176 ho\u1eb7c \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh t\u1ea1i m\u1ee5c 3.3 ph\u1ea7n II trong Quy\u1ebft \u0111\u1ecbnh 788\/2010\/BXD<\/p>\n

      \u0110\u1eb7t v\u1ea5n \u0111\u1ec1: Nh\u01b0 v\u1eady theo quy \u0111\u1ecbnh tr\u00ean th\u00ec v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng c\u00e1c khe, l\u1ed7 tr\u00ean b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 t\u00edch <= 0,1m3 th\u00ec kh\u00f4ng ph\u1ea3i tr\u1eeb?<\/p>\n

      Tr\u1ea3 l\u1eddi: \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a b\u1ea1n kh\u00f4ng tr\u1eeb th\u00ec c\u0169ng kh\u00f4ng sai, nh\u01b0ng n\u1ebfu Ch\u1ee7 \u0111\u1ea7u t\u01b0 y\u00eau c\u1ea7u ph\u1ea3i tr\u1eeb \u0111i th\u00ec v\u1eabn tr\u1eeb b\u00ecnh th\u01b0\u1eddng (V\u00ec ch\u1ec9 n\u00f3i ph\u1ea3i tr\u1eeb khi th\u1ec3 t\u00edch >0,1m3 ch\u1ee9 kh\u00f4ng n\u00f3i l\u00e0 <0,1m3 th\u00ec \u201ckh\u00f4ng tr\u1eeb\u201d nh\u01b0 tr\u01b0\u1eddng h\u1ee3p th\u00e9p nh\u01b0 tr\u00ean).<\/p>\n

      4. B\u00f3c t\u00e1ch B\u00ea t\u00f4ng kh\u00f4ng chia chi\u1ec1u cao c\u00f4ng tr\u00ecnh:<\/strong><\/p>\n

      Khi b\u00f3c t\u00e1ch kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng \u0111\u1ec3 l\u1eadp d\u1ef1 to\u00e1n: Chi\u1ec1u cao quy \u0111\u1ecbnh trong \u0110\u1ecbnh m\u1ee9c \u0111\u01b0\u1ee3c Vi\u1ec7n kinh t\u1ebf B\u1ed9 x\u00e2y d\u1ef1ng x\u00e1c nh\u1eadn l\u00e0 chi\u1ec1u cao c\u00f4ng tr\u00ecnh, v\u00e0 khi b\u00f3c t\u00e1ch, n\u1ebfu chi\u1ec1u cao c\u00f4ng tr\u00ecnh \u1edf m\u1ee9c n\u00e0o th\u00ec b\u00f3c c\u00e1c m\u00e3 hi\u1ec7u \u1ee9ng v\u1edbi chi\u1ec1u cao \u0111\u00f3. V\u00ed d\u1ee5: T\u00f2a nh\u00e0 cao 17 t\u1ea7ng c\u00f3 chi\u1ec1u cao 60m th\u00ec to\u00e0n b\u1ed9 c\u00e1c m\u00e3 hi\u1ec7u c\u00f4ng vi\u1ec7c s\u1ebd > 50m. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c n\u00f3i r\u00f5 trong \u0110\u1ecbnh m\u1ee9c 1176 v\u00e0 \u0111\u01b0\u1ee3c B\u1ed9 X\u00e2y d\u1ef1ng kh\u1eb3ng \u0111\u1ecbnh l\u1ea1i trong \u0110\u1ecbnh m\u1ee9c b\u1ed5 sung 1091.<\/p>\n

      5. Ph\u1ea7n c\u1ea5u ki\u00ean B\u00ea t\u00f4ng giao nhau t\u00ednh ra sao v\u00e0 t\u00ednh v\u00e0o c\u1ea5u ki\u1ec7n n\u00e0o? (VD: C\u1ed9t, d\u1ea7m s\u00e0n\u2026)<\/strong><\/p>\n

      Ch\u1ed7 giao gi\u1eefa c\u00e1c c\u1ea5u ki\u1ec7n b\u00ea t\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c t\u00ednh 01 l\u1ea7n: V\u00ed d\u1ee5 C\u1ed9t dao v\u1edbi D\u1ea7m th\u00ec khi b\u00f3c B\u00ea t\u00f4ng c\u1ed9t m\u00e0 kh\u00f4ng tr\u1eeb dao d\u1ea7m th\u00ec khi b\u00f3c B\u00ea t\u00f4ng D\u1ea7m ph\u1ea3i tr\u1eeb \u0111i dao C\u1ed9t v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n

      Ph\u1ea7n giao nhau gi\u1eefa c\u00e1c k\u1ebft c\u1ea5u \u0111\u01b0\u1ee3c t\u00ednh v\u00e0o k\u1ebft c\u1ea5u n\u00e0o th\u00ec th\u1ef1c ra kh\u00f4ng quy \u0111\u1ecbnh, vi\u1ec7c b\u00f3c v\u00e0o \u0111\u00e2u ph\u1ee5 thu\u1ed9c v\u00e0o quy\u1ebft \u0111\u1ecbnh c\u1ee7a ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n \u0111o b\u00f3c. Tuy nhi\u00ean th\u01b0\u1eddng t\u00e2m l\u00fd c\u1ee7a ng\u01b0\u1eddi l\u1eadp d\u1ef1 to\u00e1n th\u00ec t\u00ednh v\u00e0o \u0111\u00e2u thu\u1eadn l\u1ee3i v\u00e0 nhanh nh\u1ea5t s\u1ebd t\u00ednh v\u00e0o \u0111\u00f3, t\u00e2m l\u00fd c\u1ee7a ng\u01b0\u1eddi thi c\u00f4ng th\u00ec t\u00ednh v\u00e0o \u0111\u00e2u c\u00f3 l\u1ee3i h\u01a1n th\u00ec s\u1ebd t\u00ednh:<\/p>\n

      V\u00ed d\u1ee5: B\u00ea t\u00f4ng c\u1ed9t gi\u00e1 cao h\u01a1n B\u00ea t\u00f4ng d\u1ea7m kho\u1ea3ng 150 ng\u00ecn \/1m3; Nh\u01b0ng V\u00e1n khu\u00f4n d\u1ea7m l\u1ea1i cao h\u01a1n V\u00e1n khu\u00f4n c\u1ed9t kho\u1ea3ng 15 ngh\u00ecn\/ 1m2); T\u00f9y t\u1eebng tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3 \u0111\u1ec3 c\u00e1c b\u1ea1n quy\u1ebft \u0111\u1ecbnh tr\u1eeb v\u00e0o \u0111\u00e2u cho c\u00f3 l\u1ee3i nh\u1ea5t.<\/p>\n

      III. M\u1ed8T S\u1ed0 V\u00cd D\u1ee4 V\u1ec0 C\u00c1CH T\u00cdNH KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG HAY C\u00d2N G\u1eccI L\u00c0 C\u00c1CH \u0110O B\u00d3C KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG<\/strong><\/h3>\n

      1. C\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng c\u1ecdc vu\u00f4ng B\u00ea t\u00f4ng c\u1ed1t th\u00e9p:\u00a0<\/strong>Th\u01b0\u1eddng d\u00f9ng trong c\u00e1c C\u00f4ng tr\u00ecnh D\u00e2n d\u1ee5ng khi M\u00f3ng ph\u1ea3i s\u1eed l\u00fd n\u1ec1n \u0111\u1ea5t.<\/p>\n

      V\u00ed d\u1ee5: C\u00f4ng tr\u00ecnh ph\u1ea3i s\u1eed d\u1ee5ng 62 c\u1ecdc vu\u00f4ng BTCT c\u00f3 ti\u1ebft di\u1ec7n 200 x200 mm, trong \u0111\u00f3: M\u1ed7i c\u1ecdc d\u00e0i 12m chia l\u00e0m 03 \u0111o\u1ea1n g\u1ed3m 01 \u0111o\u1ea1n \u01101 d\u00e0i 4m v\u00e0 02 \u0111o\u1ea1n \u01102 d\u00e0i 4m<\/p>\n

      \"C\u00e1ch<\/p>\n

       <\/p>\n

      (\u0110\u01a1n v\u1ecb trong h\u00ecnh v\u1ebd: mm)<\/p>\n

      Nh\u01b0 v\u1eady t\u1ed5ng s\u1ebd c\u00f3 62 c\u1ea5u ki\u1ec7n \u01101 v\u00e0 124 c\u1ea5u ki\u1ec7n \u01102 nh\u01b0 h\u00ecnh tr\u00ean.<\/p>\n

      – C\u00e1ch t\u00ednh nh\u01b0 sau: \u00a0Vbt 62 c\u1ecdc = Vbt \u01101 (62CK) + Vbt \u01102 (124CK)<\/p>\n

      + Vbt \u01101 = 62*4*0,2*0,2+62*1\/3*0,2*0,2*0,4= 10,2507 m3<\/p>\n

      + Vbt \u01102 = 124*4*0,2*0,2 = 19,84 m3<\/p>\n

      T\u1ed5ng Vbt 62 c\u1ecdc = 10,2507+19,84\u00a0= 30,0907 m3<\/strong><\/p>\n

      L\u01b0u \u00fd: (62*1\/3*0,2*0,2*0,4) l\u00e0 c\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng 62 m\u0169i c\u1ecdc g\u1eafn v\u1edbi \u0111o\u1ea1n c\u1ecdc \u01101 v\u00e0 \u0111\u01b0\u1ee3c t\u00ednh theo th\u1ec3 t\u00edch h\u00ecnh ch\u00f3p; Th\u1ef1c ra ch\u00ednh x\u00e1c ph\u1ea3i l\u00e0 h\u00ecnh ch\u00f3p c\u1ee5t nh\u01b0ng ph\u1ea7n B\u00ea t\u00f4ng ch\u00eanh l\u1ec7ch l\u00e0 r\u1ea5t nh\u1ecf n\u00ean khi b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng \u0111\u1ec3 l\u1eadp d\u1ef1 to\u00e1n ng\u01b0\u1eddi ta th\u01b0\u1eddng t\u00ednh h\u00ecnh ch\u00f3p cho \u0111\u01a1n gi\u1ea3n.<\/em><\/p>\n

      2. C\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng m\u00f3ng \u0111\u01a1n v\u00e0 c\u00e1c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng m\u00f3ng b\u0103ng<\/strong><\/p>\n

      \"c\u00e1ch\u00a0\u200b<\/p>\n

      (\u0110\u01a1n v\u1ecb trong h\u00ecnh v\u1ebd: mm)<\/p>\n

        \n
      • Th\u1ec3 t\u00edch b\u00ea t\u00f4ng l\u00f3t:<\/li>\n<\/ul>\n

        Vbt l\u00f3t: (3,64+2,34)*2*0,65*0,1 =\u00a00,7774 m3<\/strong><\/p>\n

          \n
        • C\u00f4ng th\u1ee9c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng\u00a0b\u00ea t\u00f4ng m\u00f3ng.<\/li>\n<\/ul>\n

          Vbt: (3,44*2+2,54*2)*(0.45*0.21+0.33*0.14+0.56*0.22) =\u00a03,1562 m3<\/strong><\/p>\n

          3. C\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng \u0110\u00e0i m\u00f3ng<\/strong><\/p>\n

          T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng cho 05 \u0111\u00e0i m\u00f3ng \u01103 nh\u01b0 h\u00ecnh v\u1ebd:<\/p>\n

          (K\u00edch th\u01b0\u1edbc trong b\u1ea3n v\u1ebd mm)<\/p>\n

          \"C\u00e1ch<\/p>\n

           <\/p>\n

            \n
          • Di\u1ec7n t\u00edch m\u1eb7t b\u1eb1ng m\u00f3ng \u0111\u00e0i \u01103: S = 1*0,7+(1+0,43)*0,6\/2 = 1,129 m2\n
              \n
            • T\u1ed5ng kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng 05 \u0111\u00e0i \u01103:<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

              Vbt = 5*((1*0,7+(1+0,43)*0,6\/2))*0,7 =\u00a03,9515 m3<\/strong><\/p>\n

              4. C\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng s\u00e0n.<\/strong><\/p>\n

              Khi b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng s\u00e0n trong c\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng ta l\u1ea7n l\u01b0\u1ee3t b\u00f3c theo t\u1eebng s\u00e0n c\u1ee7a c\u00e1c t\u1ea7ng, k\u1ec3 c\u1ea3 s\u00e0n m\u00e1i v\u00e0 \u00e1p m\u00e1i (n\u1ebfu c\u00f3) sau \u0111\u00f3 t\u1ed5ng h\u1ee3p l\u1ea1i; nguy\u00ean t\u1eafc l\u00e0: T\u00ednh \u0111\u01b0\u1ee3c t\u1ed5ng Di\u1ec7n t\u00edch s\u00e0n nh\u00e2n v\u1edbi Chi\u1ec1u d\u00e0y s\u00e0n t\u01b0\u01a1ng \u1ee9ng.<\/p>\n

              Theo kinh nghi\u1ec7m khi b\u00f3c b\u00ea t\u00f4ng s\u00e0n, \u0111\u1ec3 b\u00f3c nhanh \u0111\u01b0\u1ee3c kh\u1ed1i l\u01b0\u1ee3ng ch\u00fang ta kh\u00f4ng tr\u1eeb \u0111i dao d\u1ea7m, khi n\u00e0o b\u00f3c d\u1ea7m th\u00ec chi\u1ec1u cao d\u1ea7m s\u1ebd tr\u1eeb \u0111i chi\u1ec1u d\u00e0y s\u00e0n sau.<\/p>\n

              V\u00ed d\u1ee5: T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng cho m\u1ed9t s\u00e0n \u0111i\u1ec3n h\u00ecnh nh\u01b0 h\u00ecnh v\u1ebd; s\u00e0n d\u00e0y 12 cm:<\/p>\n

               <\/p>\n

              \"C\u00e1ch<\/p>\n

              (K\u00edch th\u01b0\u1edbc trong b\u1ea3n v\u1ebd mm)<\/p>\n

              C\u00f4ng th\u1ee9c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng s\u00e0n: Th\u1ec3 t\u00edch b\u00ea t\u00f4ng s\u00e0n\u00a0V= D\u00e0i * R\u1ed9ng * Cao<\/p>\n

                \n
              • Tr\u1ee5c A-C: 4,88*13,78*0,12 = 8,0696 m3<\/li>\n
              • Tr\u1ee5c C-D: 1,9*8,25*0,12 = 1,881 m3<\/li>\n
              • V\u1ec9a s\u00e0n: ((13,78+2*0,41)*2+4,88+1,9+6,78)*0,41*0,12 = 2,1038 m3<\/li>\n
              • Tr\u1eeb \u00f4 s\u00e0n c\u1ea7u thang: -3,19*2,7*0,12 = – 1,0335 mm3<\/li>\n
              • Tr\u1eeb Giao c\u1ed9t (12 c\u1ed9t): – 12*0,22*0,22*0,12 = -0,0697 m3<\/li>\n<\/ul>\n

                T\u1ed5ng c\u1ed9ng: Vbt s\u00e0n =\u00a010,9512 m3<\/strong><\/p>\n

                5. C\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng c\u1ed9t<\/strong><\/p>\n

                Theo kinh nghi\u1ec7m, th\u1ed1ng nh\u1ea5t khi t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng d\u1ea7m s\u1ebd t\u00ednh chi\u1ec1u cao c\u1ed9t li\u00ean t\u1ee5c (kh\u00f4ng tr\u1eeb \u0111i dao d\u1ea7m), khi t\u00ednh B\u00ea t\u00f4ng d\u1ea7m s\u1ebd tr\u1eeb giao c\u1ed9t sau; T\u00ednh nh\u01b0 v\u1eady nh\u00e0 th\u1ea7u s\u1ebd l\u1ee3i ti\u1ec1n h\u01a1n v\u00ec b\u00ea t\u00f4ng c\u1ed9t \u0111\u1eaft ti\u1ec1n h\u01a1n b\u00ea t\u00f4ng d\u1ea7m.<\/p>\n

                V\u00ed d\u1ee5: M\u1ed9t c\u00f4ng tr\u00ecnh bi\u1ec7t th\u1ef1 c\u00f3 12 c\u1ed9t ti\u1ebft di\u00ean 220×220 mm; Chia l\u00e0m 3 lo\u1ea1i c\u1ed9t C1, C2 v\u00e0 C2A v\u1edbi s\u1ed1 l\u01b0\u1ee3ng nh\u01b0 h\u00ecnh v\u1ebd:<\/p>\n

                \"C\u00e1ch<\/p>\n

                 <\/p>\n

                (K\u00edch th\u01b0\u1edbc trong b\u1ea3n v\u1ebd mm)<\/p>\n

                c\u00f4ng th\u1ee9c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng\u00a0b\u00ea t\u00f4ng c\u1ed9t: V= S\u1ed1 l\u01b0\u1ee3ng * Chi\u1ec1u cao * Ti\u1ebft di\u1ec7n c\u1ed9t<\/p>\n

                \u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u1ed9t C1: 4*12,267*0,22*0,22 = 2,3749 m3<\/p>\n

                \u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u1ed9t C2: 8*13,244*0,22*0,22 = 5,1281 m3<\/p>\n

                \u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u1ed9t C3: 2*11,2*0,22*0,22 = 1,0842 m3<\/p>\n

                T\u1ed5ng c\u1ed9ng (12 c\u1ed9t): Vbt c\u1ed9t =\u00a08,5872\u00a0 m3<\/strong><\/p>\n

                IV. K\u1ebeT LU\u1eacN<\/strong><\/p>\n

                B\u00e0i vi\u1ebft \u0111\u00e3 \u0111\u01b0a ra m\u1ed9t v\u00e0i v\u00ed d\u1ee5 c\u01a1 b\u1ea3n v\u1ec1\u00a0c\u00e1ch t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng\u00a0k\u00e8m theo\u00a0c\u00f4ng th\u1ee9c t\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u00ea t\u00f4ng\u00a0trong k\u1ebft c\u1ea5u x\u00e2y d\u1ef1ng;\u00a0C\u00f2n v\u01b0\u1edbng m\u1eafc n\u00e0o mong c\u00e1c \u0111\u1ed3ng nghi\u1ec7p nhi\u1ec7t t\u00ecnh th\u1ea3o lu\u1eadn, chia s\u1ebb, \u0111\u00f3ng g\u00f3p \u00fd ki\u1ebfn \u0111\u1ec3 c\u00f9ng nhau l\u00e0m s\u00e1ng t\u1ecf nhi\u1ec1u v\u1ea5n \u0111\u1ec1 h\u01a1n n\u1eefa.<\/p>\n

                ———————–<\/strong><\/p>\n

                B\u1ea1n h\u00e3y comment, b\u00ecnh lu\u1eadn \u1edf d\u01b0\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00e0 b\u1ea1n c\u1ea7n l\u00e0m s\u00e1ng t\u1ecf trong \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 l\u1eadp d\u1ef1 to\u00e1n c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng. Ch\u00ednh b\u1ea1n s\u1ebd l\u00e0 ng\u01b0\u1eddi t\u1ea1o ra ch\u1ee7 \u0111\u1ec1 ti\u1ebfp theo trong chu\u1ed7i b\u00e0i vi\u1ebft chia s\u1ebb ki\u1ebfn th\u1ee9c c\u1ee7a ch\u00fang t\u00f4i.<\/p>\n

                Ch\u00fac c\u00e1c b\u1ea1n th\u00e0nh c\u00f4ng!<\/p>\n","protected":false},"excerpt":{"rendered":"

                C\u00c1CH T\u00cdNH KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG T\u1ea4T C\u1ea2 C\u00c1C C\u1ea4U KI\u1ec6N I. M\u1ee4C \u0110\u00cdCH C\u1ee6A VI\u1ec6C\u00a0T\u00cdNH KH\u1ed0I L\u01af\u1ee2NG B\u00ca T\u00d4NG N\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch \u0111o b\u00f3c kh\u1ed1i l\u01b0\u1ee3ng B\u00ea t\u00f4ng trong c\u00e1c h\u1ea1ng m\u1ee5c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng r\u1ea5t quan tr\u1ecdng, gi\u00fap ch\u00fang ta t\u1ef1 tin gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c nhi\u1ec1u c\u00f4ng vi\u1ec7c trong l\u0129nh v\u1ef1c x\u00e2y…<\/p>\n","protected":false},"author":1,"featured_media":2447,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2438","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/2438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2438"}],"version-history":[{"count":4,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/2438\/revisions"}],"predecessor-version":[{"id":2449,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/2438\/revisions\/2449"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/media\/2447"}],"wp:attachment":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}