堤防填筑碾壓試驗報告

包頭市土右旗水澗溝河道整治工程內(nèi)蒙古黃河工程局股份包頭市土右旗水澗溝河道整治工程施工第二標段2023年11月15日水澗溝河道整治工程一、前言包頭市土默特土右旗，位于內(nèi)蒙古自治區(qū)西部，地處自治區(qū)首府呼和浩特市、自治區(qū)最大的工業(yè)城市包頭市和準格爾煤田“金三角〞腹地，地處土默川平原中部，總面積，東西長，南北寬。境內(nèi)北部為大青山區(qū)，南部是土默川平原，分別占全旗總面積的25％和75％。旗境東連土左旗，西接包頭市九原區(qū)，南以黃河為界與鄂爾多斯市接壤，北同固陽、武川兩縣毗鄰。本標段是水澗溝河道整治工程第二標段，全長2291m。二、主壩土料選擇堤防右岸附近農(nóng)田內(nèi)第三紀的粘性土作為堤防填筑土料，對土料現(xiàn)場取樣經(jīng)試驗室試檢驗其最大干密度為1.63g/cm3,最優(yōu)含水量1%。三、碾壓試驗方案1、實驗目的通過試驗確定壓實機具的碾壓效果；通過試驗為堤防填筑選擇滿足設計要求的、合理的碾壓技術參數(shù)〔鋪土厚度、碾壓遍數(shù)〕；驗證選用壓實機械可靠性，取土、卸料、平整、碾壓等施工方法，以指導全線施工。2、試驗依據(jù)《碾壓式土石壩施工技術標準》DL/T5129-2001；3、土料填筑設計指標堤防2。4、試驗場地選擇在左岸堤防5+400處用推土機平整出3個20米×6米的場地，根底碾壓至設計標準，作為碾壓試驗場地。5、碾壓試驗機械選擇運輸機械：裝載機裝車，15t自卸汽車運輸。平料機械：74KW推土機。壓實機械：74KW推土機進行碾壓。灑水設備：采用灑水車均勻灑水。試驗設備：環(huán)刀，天平。6、碾壓試驗施工參數(shù)選擇1〕、含水量的選擇試驗先以土料擊實試驗的最優(yōu)含水量進行試驗。2〕、鋪料厚度試驗鋪料厚度初選為：H1=25cm，H2=30cm，H3=35cm。3〕、碾壓遍數(shù)試驗碾壓遍數(shù)初選為：，N1=4,N2=6，N3=8。7、碾壓試驗將料場土料含水量調(diào)到試驗控制范圍內(nèi)。采用水準儀測量試驗場地的地面高程，以便控制鋪土厚度。按試驗要求進行土料鋪填。鋪料采用后退法，推土機平整土料，鋪料厚度采用水準儀控制，鋪料過程中進行均勻灑水，以補充運輸過程中土料中水分的損失。土壓過后外表無彈簧土、無龜裂現(xiàn)象，無黏碾現(xiàn)象。采用進退錯距法碾壓，碾壓遍數(shù)為4、6、8遍。根據(jù)不同的鋪土厚度、碾壓遍數(shù)，測定土料干容重。8、試驗成果整理根據(jù)試驗測定的數(shù)據(jù)〔見附表〕，進行鋪土厚度、碾壓遍數(shù)的關系曲線的繪制〔見附件〕。9、試驗成果分析壓實度檢測成果匯總表見附表1。碾壓遍數(shù)與沉降量的關系曲線見附圖1；從附圖1可以看出，鋪料厚度相同時除25cm以外，沉降量隨碾壓遍數(shù)的增加而增大，在碾壓遍數(shù)相同時，沉降量除25cm以外隨鋪土厚度的增加而增大。從附圖2、附圖3可以看出，25cm、30cm的平均壓實度隨碾壓遍數(shù)的增加而減小，35cm的平均壓實度隨碾壓遍數(shù)的增加而減小。本次試驗所用土料的含水率在%~%之間，土料最優(yōu)含水率為1%，碾壓過程中土料可塑性好，未出現(xiàn)彈簧土。四、試驗結(jié)論根據(jù)試驗成果分析確定碾壓遍數(shù)、施工機械和鋪土厚度的施工參數(shù)為：鋪料厚度：30cm碾壓遍數(shù)：6遍壓實機械：74KW推土機附件成果分析圖擊實試驗報告鋪土厚、干密度、與壓實度檢測表檢測表匯總35cm附圖135cm5.15.130cm4.64.8沉30cm4.64.825cm降25cm量684附圖268435cm附圖235cm30cm30cm25cm干25cm密度68468435cm35cm附圖330cm30cm25cm壓25cm實度684684碾壓試驗結(jié)果及施工參數(shù)統(tǒng)計表〔1〕設計鋪土厚度〔cm)碾壓4遍碾壓6遍碾壓8遍含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度25cm(一區(qū)〕19.101.5192.6418.501.5092.0020.101.4991.4020.101.5192.6419.601.5092.0020.501.4991.4019.601.5283.2519.401.4991.4019.101.4991.4018.901.5192.6418.401.5092.0218.601.4991.4019.401.5192.6419.201.4991.4018.901.4991.4018.701.5092.0220.901.4991.4019.401.5092.0018.201.5192.6418.601.5092.0018.801.5092.0019.801.5192.6418.601.5019.001.5092.0020.601.5192.6419.001.4991.4119.301.4991.4017.901.5293.2519.101.5092.0218.401.4992.00平均19.231.5191.7019.131.5091.7719.211.4991.64碾壓試驗結(jié)果及施工參數(shù)統(tǒng)計表〔2〕設計鋪土厚度〔cm)碾壓4遍碾壓6遍碾壓8遍含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度30cm(二區(qū)〕19.101.4186.5018.101.5293.2519.501.5092.0019.601.4488.3418.701.5092.001.5092.0018.601.4488.3419.101.5092.0020.201.4991.4018.901.4387.7320.601.5293.2518.901.5092.0018.601.4186.5018.701.5092.0018.901.5092.0018.701.4186.5018.801.5092.0018.901.5092.0019.201.4287.1218.701.5192.6418.401.4991.4020.501.4186.5019.401.5293.2520.201.5192.6419.901.4186.5019.801.5092.0019.301.5092.0019.201.42.87.1018.601.5192.6418.701.4991.40平均19.231.4287.1119.051.5192.5019.241.5091.88碾壓試驗結(jié)果及施工參數(shù)統(tǒng)計表〔3〕設計鋪土厚度〔cm)碾壓4遍碾壓6遍碾壓8遍含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度含水率〔%〕干密度g/cm3壓實度35cm(三區(qū)〕19.401.4287.1219.201.4287.1219.301.5494.4819.401.3985.2818.401.4588.9619.501.5293.2518.901.4287.1219.601.4689.5719.501.5494.4818.401.4085.8920.001.4387.7319.101.5595.0918.701.4085.8919.101.4387.7318.601.5494.4818.501.4186.5019.301.4790.1819.401.5393.8719.201.4287.3118.601.4588.9620.001.5293.2501.4186.5018.401.4488.3419.401.5293.2520.001.3985.2820.001.4588.9619.001.5393.8718.201.4085.8919.201.4890.8018.301.5393.87平均19.111.4186.2819.181.4588.8419.211.5393.99單位工程名稱取樣樁號及部位試驗場地面積50m×100m取樣區(qū)域H1區(qū)取樣數(shù)量10碾壓機具及型號70東方紅推土機碾壓遍數(shù)第四遍鋪土厚度25cm設計干密度最大干密度要求壓實度鋪設土質(zhì)粘性土試驗方法環(huán)刀法試驗日期編號12345678910實測厚度〔cm〕21.421.321.421.421.421.321.321.421.421.3濕土質(zhì)量〔g〕359.68362.55363.43359.08360.44355.95356.81361.80364.06358.26環(huán)刀容積〔cm3〕200200200200200200200200200200濕密度〔g/cm3〕1.801.811.821.801.801.781.781.811.821.79含水量盒號〔#〕盒+濕土質(zhì)量(g)45.5441.9141.1939.8641.0539.6140.7038.4840.5340.0941.0838.9938.2439.0041.9939.2839.9538.1139.0339.08盒+干土質(zhì)量(g)3水分質(zhì)量(g)4.563.323.223.153.182.933.023.053.333.213.152.662.752.712.872.702.782.702.642.81盒質(zhì)量(g)干土質(zhì)量(g)18.2317.7616.6616.43含水量(%)18.619.620.519.619.319.819.318.519.818.918.718.617.818.520.119.520.320.817.518.2平均含水量(%)19.120.119.618.919.418.718.219.820.617.9干密度(g/cm3)1.511.511.521.511.511.501.511.511.511.52實測壓實度(%)92.6492.6493.2592.6492.6492.0292.6492.6492.6493.25碾壓試驗檢測干密度與壓實遍數(shù)關系報表取樣人：復核：單位工程名稱取樣樁號及部位試驗場地面積50m×100m取樣區(qū)域H1區(qū)取樣數(shù)量10碾壓機具及型號70東方紅推土機碾壓遍數(shù)第六遍鋪土厚度25cm設計干密度最大干密度要求壓實度鋪設土質(zhì)粘性土試驗方法環(huán)刀法試驗日期編號12345678910實測厚度〔cm〕21.021.021.121.021.021.021.021.121.121.0濕土質(zhì)量〔g〕355.35358.65355.66355.05355.07360.13355.80355.65354.47357.30環(huán)刀容積〔cm3〕200200200200200200200200200200濕密度〔g/cm3〕1.781.791.781.781.781.801.781.781.771.79含水量盒號〔#〕盒+濕土質(zhì)量(g)41.3339.1338.6638.7740.5738.8438.3737.2937.8744.8547.0646.0242.1140.2942.1048.0141.1839.1941.0740.34盒+干土質(zhì)量(g)水分質(zhì)量(g)2.602.652.712.542.562.462.382.322.484.084.624.004.493.924.366.394.173.534.334.06盒質(zhì)量(g)2215.93干土質(zhì)量(g)15.432018.79含水量(%)18.818.119.319.819.119.617.219.519.518.820.621.118.318.918.518.619.218.719.518.7平均含水量(%)18.519.619.418.419.220.918.618.619.019.1干密度(g/cm3)1.501.501.491.501.491.491.501.501.491.50實測壓實度(%)92.0292.0291.4192.0291.4191.4192.0292.0291.4192.02碾壓試驗檢測干密度與壓實遍數(shù)關系報表取樣人：復核：單位工程名稱取樣樁號及部位試驗場地面積50m×100m取樣區(qū)域H1區(qū)取樣數(shù)量10碾壓機具及型號70東方紅推土機碾壓遍數(shù)第八遍鋪土厚度25cm設計干密度最大干密度要求壓實度鋪設土質(zhì)粘性土試驗方法環(huán)刀法試驗日期編號12345678910實測厚度〔cm〕21.021.021.021.021.021.021.020.921.021.0濕土質(zhì)量〔g〕357.75358.94354.77353.43354.32358.05356.40357.00355.37355.20環(huán)刀容積〔cm3〕200200200200200200200200200200濕密度〔g/cm3〕1.791.791.771.771.771.791.781.791.781.78含水量盒號〔#〕