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目 錄 1.干砌片石坡面防護(hù) ·······················································1 2.骨架護(hù)坡 ·····························································1 3.漿砌片石護(hù)坡、護(hù)墻 ···················································1 4.種草籽防護(hù) ··························································2 4.1 鋪草皮、種草籽 ···················································2 4.2 鋪草皮 ·············································
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3.3.2.路基支擋結(jié)構(gòu)的施工要求 a.在巖體破碎、土質(zhì)松軟或有水地段修建支擋結(jié)構(gòu),宜在旱季施工,并應(yīng)集中力量,分段施 工,不應(yīng)長(zhǎng)段拉開(kāi)挖基。 b.漿砌片石砌體必須選用質(zhì)地堅(jiān)硬、不易風(fēng)化、無(wú)裂紋、無(wú)水銹的片石,其母巖強(qiáng)度等級(jí)應(yīng) ≥MU30;各類(lèi)石料最小塊徑應(yīng)大于 15cm。片石應(yīng)采用擠漿法砌筑 i嚴(yán)禁使用灌漿法工片石砌 筑施工時(shí),砌塊應(yīng)大面朝下,丁順相間,上下錯(cuò)縫,嚴(yán)禁砌成水平通縫或斜通縫,禁止出現(xiàn) 空縫。 c.支擋結(jié)構(gòu)施工前,應(yīng)在上方作好截、排水及防滲設(shè)施;雨期施工宜搭設(shè)雨棚。 d.明挖基坑應(yīng)符合下列規(guī)定: ①應(yīng)核對(duì)地質(zhì)情況,當(dāng)與設(shè)計(jì)不符時(shí)應(yīng)及時(shí)反饋。 ②坑內(nèi)有積水應(yīng)設(shè)排水溝、集水井排水。 ③墻基位于斜坡時(shí),墻趾埋入深度和距地面水平距離均應(yīng)符合設(shè)計(jì)要求。 ④采用傾斜基底時(shí),應(yīng)準(zhǔn)確挖、鑿,不得填補(bǔ)。 ⑤基坑開(kāi)挖至設(shè)計(jì)高程后, 應(yīng)立即進(jìn)行基底承載力檢查; 當(dāng)承載力不足時(shí), 應(yīng)按規(guī)定變更設(shè) 計(jì)
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