格式:pdf
大?。?span class="single-tag-height">154KB
頁數(shù): 4頁
僅供個人學(xué)習(xí)參考 目次 1適用范圍 ··························································· 1 2引用標(biāo)準(zhǔn) ··························································· 1 3術(shù)語 ··························································· 1 4材料要求 ··························································· 1 5施工準(zhǔn)備 ·························································· 1 6操作工藝 ·········································
格式:pdf
大小:23KB
頁數(shù): 3頁
3-3 級配砂石地基施工工藝標(biāo)準(zhǔn)( 303-2007) 1 適用范圍 本工藝標(biāo)準(zhǔn)適用于工業(yè)和民用建筑中以及配砂石填筑地基或進(jìn)行地基處理。 2 施工準(zhǔn)備 2.1 材料要求 2.1.1 天然級配砂石或人工級配砂石,宜采用質(zhì)地堅硬的中砂、粗砂、礫砂、石 屑或其他穩(wěn)定性好、透水性墻的無害工業(yè)廢粒料。在缺少中、粗砂和礫石的地區(qū),當(dāng) 有實驗依據(jù)時,可采用細(xì)砂,但宜同時摻入一定數(shù)量粒徑 20~50mm的碎石或卵石, 其摻量應(yīng)符合設(shè)計要求 2.1.2 級配砂石材料, 碎(卵)石含量不得超過 50%,不得含有草根、 垃 圾 等有機雜物。含泥量不宜超過 5%,用做排水固結(jié)地基時,含泥量不宜超過 3%。碎 石或卵石最大粒徑補打大于墊層或虛鋪厚度的 2/3,并不宜大于 50mm。 2.2 主要機具 一般應(yīng)備有人力夯、蛙式打夯機、推土機、壓路機( 6~10t)、手推車、平頭鐵鍬、 噴水用膠管、 2m靠尺、小線或細(xì)鐵