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級(jí)配砂石回填施工工藝標(biāo)準(zhǔn)

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僅供個(gè)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(yǔ) ··························································· 1 4材料要求 ··························································· 1 5施工準(zhǔn)備 ·························································· 1 6操作工藝 ·········································

級(jí)配砂石地基施工工藝標(biāo)準(zhǔn)

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3-3 級(jí)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(jí)配砂石或人工級(jí)配砂石,宜采用質(zhì)地堅(jiān)硬的中砂、粗砂、礫砂、石 屑或其他穩(wěn)定性好、透水性墻的無(wú)害工業(yè)廢粒料。在缺少中、粗砂和礫石的地區(qū),當(dāng) 有實(shí)驗(yàn)依據(jù)時(shí),可采用細(xì)砂,但宜同時(shí)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(jì)要求 2.1.2 級(jí)配砂石材料, 碎(卵)石含量不得超過(guò) 50%,不得含有草根、 垃 圾 等有機(jī)雜物。含泥量不宜超過(guò) 5%,用做排水固結(jié)地基時(shí),含泥量不宜超過(guò) 3%。碎 石或卵石最大粒徑補(bǔ)打大于墊層或虛鋪厚度的 2/3,并不宜大于 50mm。 2.2 主要機(jī)具 一般應(yīng)備有人力夯、蛙式打夯機(jī)、推土機(jī)、壓路機(jī)( 6~10t)、手推車、平頭鐵鍬、 噴水用膠管、 2m靠尺、小線或細(xì)鐵

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