坡腳石料擋墻施工方案一、工程概況1.1項(xiàng)目背景本工程為坡腳石料擋墻施工項(xiàng)目，位于山地丘陵區(qū)域，擋墻全長800米，平均高度5.2米，最大高度8米，采用重力式漿砌片石結(jié)構(gòu)。主要功能為防止坡體滑坡、保護(hù)坡腳道路及周邊設(shè)施安全，設(shè)計(jì)使用年限50年。場地地質(zhì)勘察顯示，坡體上部為松散素填土（厚1.2-2.5米），下部為中風(fēng)化砂巖，地下水位埋深5-7米，地震烈度Ⅵ度區(qū)。1.2設(shè)計(jì)參數(shù)結(jié)構(gòu)形式：重力式漿砌片石擋墻，墻面坡度1:0.3，基底寬度3.5-5.8米（隨墻高變化）。材料要求：片石：單塊重量≥30kg，厚度≥20cm，抗壓強(qiáng)度≥30MPa，表面無風(fēng)化、裂紋；砂漿：M7.5水泥砂漿，水泥采用P.O42.5普通硅酸鹽水泥，砂為中粗砂，含泥量≤3%；混凝土：基礎(chǔ)墊層采用C15混凝土，厚度10cm；反濾層：級配碎石（粒徑5-31.5mm）+土工布（滲透系數(shù)≥1×10?3cm/s）。構(gòu)造措施：沉降縫：每10-15米設(shè)置一道，縫寬20mm，采用瀝青木板填塞；泄水孔：φ100mmPVC管，間距2米×2米梅花形布置，外傾5%，孔后設(shè)50cm×50cm×30cm反濾層。1.3工程量項(xiàng)目名稱單位數(shù)量備注基坑開挖m36200含土方、石方漿砌片石墻身m34800含鑲面石、填腹石C15混凝土墊層m3420基礎(chǔ)墊層反濾層m3380級配碎石+土工布沉降縫m800瀝青木板填塞泄水孔個(gè)640φ100mmPVC管二、施工組織2.1管理機(jī)構(gòu)項(xiàng)目經(jīng)理：1人，負(fù)責(zé)全面協(xié)調(diào)、進(jìn)度與安全管理；技術(shù)負(fù)責(zé)人：1人，負(fù)責(zé)施工方案實(shí)施、技術(shù)交底及問題處理；質(zhì)量工程師：2人，負(fù)責(zé)材料檢驗(yàn)、工序驗(yàn)收；安全工程師：2人，負(fù)責(zé)危險(xiǎn)源辨識、安全培訓(xùn)及防護(hù)檢查；施工隊(duì)長：3人，負(fù)責(zé)現(xiàn)場作業(yè)調(diào)度、人員管理。2.2施工隊(duì)伍配置土方隊(duì)：20人，負(fù)責(zé)基坑開挖、回填及場地平整；砌筑隊(duì)：25人，負(fù)責(zé)漿砌片石墻身施工；混凝土隊(duì)：10人，負(fù)責(zé)墊層澆筑、養(yǎng)護(hù)；測量隊(duì)：5人，負(fù)責(zé)軸線放樣、高程控制；普工隊(duì)：15人，負(fù)責(zé)材料轉(zhuǎn)運(yùn)、現(xiàn)場清理。2.3主要設(shè)備設(shè)備名稱型號數(shù)量用途液壓挖掘機(jī)PC2202臺基坑開挖、土方轉(zhuǎn)運(yùn)自卸汽車15t5輛棄土、材料運(yùn)輸砂漿攪拌機(jī)JS3503臺M7.5水泥砂漿攪拌全站儀TS061臺軸線及高程控制水準(zhǔn)儀DS32臺標(biāo)高測量振搗器ZN503臺混凝土墊層振搗發(fā)電機(jī)150kW1臺備用電源三、施工工藝3.1施工流程測量放樣→截水溝施工→基坑開挖→基底處理→墊層澆筑→墻身砌筑→沉降縫設(shè)置→泄水孔及反濾層施工→墻背回填→竣工驗(yàn)收3.2關(guān)鍵工序施工3.2.1測量放樣平面控制：沿?fù)鯄S線每20米設(shè)置控制樁，采用全站儀極坐標(biāo)法放樣，誤差≤15mm；每50米設(shè)置永久水準(zhǔn)點(diǎn)，閉合差≤±200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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