{"id":65,"date":"2026-10-01T04:10:21","date_gmt":"2026-10-01T04:10:21","guid":{"rendered":"https:\/\/vanepxaydung.com\/?p=65"},"modified":"2026-10-01T04:10:21","modified_gmt":"2026-10-01T04:10:21","slug":"cach-tinh-so-luong-van-cop-pha","status":"publish","type":"post","link":"https:\/\/vanepxaydung.com\/?p=65","title":{"rendered":"C\u00e1ch t\u00ednh s\u1ed1 l\u01b0\u1ee3ng v\u00e1n c\u1ed1p pha c\u1ea7n d\u00f9ng cho m\u1ed9t c\u00f4ng tr\u00ecnh"},"content":{"rendered":"<p>\u0110\u1eb7t v\u00e1n c\u1ed1p pha m\u00e0 t\u00ednh thi\u1ebfu th\u00ec gi\u1eefa bu\u1ed5i \u0111\u1ed5 b\u00ea t\u00f4ng ph\u1ea3i d\u1eebng l\u1ea1i ch\u1edd giao b\u1ed5 sung, c\u00f2n t\u00ednh d\u01b0 th\u00ec v\u1eeba t\u1ed1n ti\u1ec1n v\u1eeba m\u1ea5t c\u00f4ng ch\u1edf ng\u01b0\u1ee3c v\u1ec1. Kh\u00f4ng c\u1ea7n qu\u00e1 ch\u00ednh x\u00e1c \u0111\u1ebfn t\u1eebng t\u1ea5m, nh\u01b0ng n\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch \u01b0\u1edbc t\u00ednh c\u01a1 b\u1ea3n s\u1ebd gi\u00fap b\u1ea1n l\u00e0m vi\u1ec7c v\u1edbi nh\u00e0 cung c\u1ea5p hi\u1ec7u qu\u1ea3 h\u01a1n nhi\u1ec1u.<\/p>\n<h2>Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n: t\u00ednh theo di\u1ec7n t\u00edch c\u1ed1p pha, kh\u00f4ng t\u00ednh theo di\u1ec7n t\u00edch s\u00e0n<\/h2>\n<p>Sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p nh\u1ea5t l\u00e0 l\u1ea5y di\u1ec7n t\u00edch s\u00e0n nh\u00e0 \u0111\u1ec3 \u00e1ng ch\u1eebng s\u1ed1 v\u00e1n. Th\u1ef1c t\u1ebf, c\u1ed1p pha ph\u1ea3i bao h\u1ebft b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac v\u1edbi b\u00ea t\u00f4ng: \u0111\u00e1y v\u00e0 hai b\u00ean th\u00e0nh d\u1ea7m, b\u1ed1n m\u1eb7t c\u1ed9t, m\u1eb7t d\u01b0\u1edbi s\u00e0n. M\u1ed9t m\u00e9t vu\u00f4ng s\u00e0n th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 c\u1ea7n di\u1ec7n t\u00edch v\u00e1n l\u1edbn h\u01a1n nhi\u1ec1u l\u1ea7n tu\u1ef3 s\u1ed1 l\u01b0\u1ee3ng d\u1ea7m, c\u1ed9t \u0111i k\u00e8m.<\/p>\n<h2>C\u00e1c b\u01b0\u1edbc \u01b0\u1edbc t\u00ednh<\/h2>\n<h3>B\u01b0\u1edbc 1: T\u00ednh di\u1ec7n t\u00edch c\u1ed1p pha t\u1eebng h\u1ea1ng m\u1ee5c<\/h3>\n<ul>\n<li><strong>C\u1ed9t:<\/strong> di\u1ec7n t\u00edch = chu vi ti\u1ebft di\u1ec7n c\u1ed9t \u00d7 chi\u1ec1u cao c\u1ed9t \u00d7 s\u1ed1 l\u01b0\u1ee3ng c\u1ed9t.<\/li>\n<li><strong>D\u1ea7m:<\/strong> di\u1ec7n t\u00edch = (2 \u00d7 chi\u1ec1u cao d\u1ea7m + b\u1ec1 r\u1ed9ng \u0111\u00e1y d\u1ea7m) \u00d7 chi\u1ec1u d\u00e0i d\u1ea7m, c\u1ed9ng d\u1ed3n cho t\u1ea5t c\u1ea3 c\u00e1c d\u1ea7m.<\/li>\n<li><strong>S\u00e0n:<\/strong> di\u1ec7n t\u00edch c\u1ed1p pha \u0111\u00e1y s\u00e0n g\u1ea7n b\u1eb1ng di\u1ec7n t\u00edch s\u00e0n th\u1ef1c t\u1ebf (tr\u1eeb ph\u1ea7n \u0111\u00e3 c\u00f3 d\u1ea7m, c\u1ed9t cho\u00e1n ch\u1ed7).<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 2: C\u1ed9ng t\u1ed5ng di\u1ec7n t\u00edch c\u1ea7n d\u00f9ng cho m\u1ed9t \u0111\u1ee3t \u0111\u1ed5<\/h3>\n<p>C\u1ed9ng di\u1ec7n t\u00edch c\u1ed9t, d\u1ea7m, s\u00e0n c\u1ee7a c\u00e1c h\u1ea1ng m\u1ee5c \u0111\u1ed5 c\u00f9ng m\u1ed9t \u0111\u1ee3t l\u1ea1i v\u1edbi nhau.<\/p>\n<h3>B\u01b0\u1edbc 3: Quy \u0111\u1ed5i ra s\u1ed1 t\u1ea5m v\u00e1n<\/h3>\n<p>L\u1ea5y t\u1ed5ng di\u1ec7n t\u00edch chia cho di\u1ec7n t\u00edch m\u1ed9t t\u1ea5m v\u00e1n (kh\u1ed5 ph\u1ed5 bi\u1ebfn 1220 x 2440mm \u2248 2,97 m\u00b2\/t\u1ea5m) \u0111\u1ec3 ra s\u1ed1 t\u1ea5m l\u00fd thuy\u1ebft.<\/p>\n<h3>B\u01b0\u1edbc 4: C\u1ed9ng th\u00eam ph\u1ea7n d\u1ef1 ph\u00f2ng hao h\u1ee5t<\/h3>\n<p>Th\u1ef1c t\u1ebf l\u1eafp d\u1ef1ng lu\u00f4n c\u00f3 ph\u1ea7n c\u1eaft b\u1ecf, gh\u00e9p kh\u00f4ng kh\u00edt ho\u1eb7c h\u01b0 h\u1ecfng trong l\u00fac thi c\u00f4ng. N\u00ean c\u1ed9ng th\u00eam kho\u1ea3ng 5-10% so v\u1edbi s\u1ed1 t\u1ea5m l\u00fd thuy\u1ebft \u0111\u1ec3 tr\u00e1nh thi\u1ebfu gi\u1eefa ch\u1eebng.<\/p>\n<h2>N\u1ebfu d\u00f9ng l\u1ea1i v\u00e1n qua nhi\u1ec1u \u0111\u1ee3t \u0111\u1ed5<\/h2>\n<p>V\u1edbi c\u00f4ng tr\u00ecnh nhi\u1ec1u t\u1ea7ng, kh\u00f4ng c\u1ea7n mua \u0111\u1ee7 s\u1ed1 v\u00e1n cho to\u00e0n b\u1ed9 c\u00f4ng tr\u00ecnh c\u00f9ng l\u00fac. C\u00f3 th\u1ec3 t\u00ednh s\u1ed1 v\u00e1n \u0111\u1ee7 d\u00f9ng cho 1-2 \u0111\u1ee3t \u0111\u1ed5 g\u1ea7n nhau, sau \u0111\u00f3 th\u00e1o d\u1ee1 v\u00e0 lu\u00e2n chuy\u1ec3n l\u00ean \u0111\u1ee3t ti\u1ebfp theo \u2014 mi\u1ec5n l\u00e0 l\u1ecbch thi c\u00f4ng c\u00e1c \u0111\u1ee3t kh\u00f4ng tr\u00f9ng nhau. C\u00e1ch n\u00e0y gi\u00fap gi\u1ea3m v\u1ed1n \u0111\u1ecdng v\u00e0o v\u1eadt t\u01b0 so v\u1edbi mua \u0111\u1ee7 ngay t\u1eeb \u0111\u1ea7u.<\/p>\n<h2>M\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 h\u00ecnh dung<\/h2>\n<p>M\u1ed9t s\u00e0n 100m\u00b2 c\u00f3 h\u1ec7 d\u1ea7m, c\u1ed9t \u0111i k\u00e8m th\u01b0\u1eddng c\u1ea7n di\u1ec7n t\u00edch c\u1ed1p pha th\u1ef1c t\u1ebf cao h\u01a1n 100m\u00b2 kh\u00e1 nhi\u1ec1u do ph\u1ea3i t\u00ednh th\u00eam hai m\u1eb7t b\u00ean v\u00e0 \u0111\u00e1y d\u1ea7m, b\u1ed1n m\u1eb7t c\u1ed9t \u2014 con s\u1ed1 c\u1ee5 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ed1 l\u01b0\u1ee3ng v\u00e0 k\u00edch th\u01b0\u1edbc d\u1ea7m c\u1ed9t c\u1ee7a t\u1eebng thi\u1ebft k\u1ebf, n\u00ean kh\u00f4ng c\u00f3 m\u1ed9t t\u1ef7 l\u1ec7 c\u1ed1 \u0111\u1ecbnh \u00e1p d\u1ee5ng chung cho m\u1ecdi c\u00f4ng tr\u00ecnh. C\u00e1ch ch\u1eafc ch\u1eafn nh\u1ea5t v\u1eabn l\u00e0 t\u00ednh ri\u00eang t\u1eebng h\u1ea1ng m\u1ee5c theo b\u1ea3n v\u1ebd k\u1ebft c\u1ea5u nh\u01b0 c\u00e1c b\u01b0\u1edbc \u1edf tr\u00ean.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00ednh s\u1ed1 l\u01b0\u1ee3ng v\u00e1n c\u1ed1p pha theo di\u1ec7n t\u00edch ti\u1ebfp x\u00fac b\u00ea t\u00f4ng th\u1ef1c t\u1ebf c\u1ee7a t\u1eebng h\u1ea1ng m\u1ee5c, c\u1ed9ng th\u00eam ph\u1ea7n d\u1ef1 ph\u00f2ng hao h\u1ee5t, s\u1ebd ch\u00ednh x\u00e1c h\u01a1n nhi\u1ec1u so v\u1edbi \u00e1ng ch\u1eebng theo di\u1ec7n t\u00edch s\u00e0n. V\u1edbi c\u00f4ng tr\u00ecnh ph\u1ee9c t\u1ea1p ho\u1eb7c kh\u00f4ng ch\u1eafc ch\u1eafn, n\u00ean nh\u1edd \u0111\u01a1n v\u1ecb cung c\u1ea5p ho\u1eb7c k\u1ef9 s\u01b0 thi c\u00f4ng t\u00ednh l\u1ea1i d\u1ef1a tr\u00ean b\u1ea3n v\u1ebd c\u1ee5 th\u1ec3 tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1eb7t thi\u1ebfu v\u00e1n gi\u1eefa bu\u1ed5i \u0111\u1ed5 b\u00ea t\u00f4ng hay \u0111\u1eb7t d\u01b0 g\u00e2y l\u00e3ng ph\u00ed \u0111\u1ec1u do t\u00ednh sai s\u1ed1 l\u01b0\u1ee3ng. B\u00e0i vi\u1ebft h\u01b0\u1edbng d\u1eabn c\u00e1ch \u01b0\u1edbc t\u00ednh s\u1ed1 l\u01b0\u1ee3ng v\u00e1n c\u1ed1p pha c\u1ea7n d\u00f9ng m\u1ed9t c\u00e1ch th\u1ef1c t\u1ebf.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-65","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=\/wp\/v2\/posts\/65","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=65"}],"version-history":[{"count":0,"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=\/wp\/v2\/posts\/65\/revisions"}],"wp:attachment":[{"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=65"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=65"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vanepxaydung.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=65"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}