路基試驗段總結報告為全面展開路基土方填筑施工，我分部在K54+365～K54+565段進行了做土方填筑試驗。試驗段長200m，共進行實驗8層，其中93區4層〔6-9層〕、94區2層〔14-15層〕、96區2層〔17-18層〕，均為土方填筑。在路基填方試驗段施工方案指導下，我分部已成功完成了該試驗段施工，并獲得了珍貴的試驗數據，為大面積的路基土方填筑施工提供了依據。一、進行所屬試驗段的目的〔一〕通過本試驗段施工，摸索并總結出一套路基土方填筑施工最合理的施工組織和施工工藝，并總結出如何依據招標文件的技術及質量標準進行標準的程序管理方法和質量控制手段。

〔二〕通過本試驗段施工，摸索并總結低洼農種區路基床的降排水、清表及填前碾壓、回填及碾壓、土方填筑適宜的松鋪厚度、不同自然條件下最正確碾壓機械設備組合、最適宜的碾壓遍數和碾壓速度。

〔三〕通過本試驗段施工，收集相關數據，最終確定路基93區、94區、96區的以下施工參數，指導全線路基土方填筑施工并到達技術質量標準。二、施工組織和施工安排〔一〕試驗段管理及施工人員配備表序號姓名職稱崗位1王永剛總負責人2韓彥輝技術負責人3熊軍現場技術負責人4鄭得洋現場施工負責人5王靜山施工平安負責人6趙曉楠測量負責人7彭鵬程試驗負責人〔二〕試驗段施工主要機械及設備配置表序號機械設備名稱規格型號數量數量1挖掘機大宇220臺32推土機180型臺23平地機PYl60型臺14壓路機YZ18型臺25灑水車EQ140JZ輛16自卸汽車后八輪輛107全站儀SOUTH—NTS352臺18水準儀DSZS臺195米5M根110灌砂筒150cm套2〔三〕施工準備：1.技術準備：〔1〕試驗室標準試驗成果匯總表〔包括填料的重型擊實，CBR，塑、液限，含水率，顆粒分析等〕，詳見附件。2、現場準備：〔1〕試驗段相應施工、管理人員組織安排已均全部到位到位；〔2〕試驗段施工機械配備全部就緒；〔3〕已打通通往試驗段的施工便道。〔四〕試驗段施工方案工期：2011年1月23日-2011年3月15日。三、施工工藝〔一〕測量放樣首先由施工隊伍進行放樣，用全站儀測量以確立開挖邊線或坡腳線，根據中樁、邊樁及相應高程測出試驗段各橫斷面面積，對工程量進行復核。〔二〕清表對試驗段和取土場進行清表，由于試驗段范圍內為全填地段，有大于1:5的橫坡，根據地形特點，清表采用小型推土機、挖掘機及人工相結合的方式進行，將橫坡大于1:5的地段按標準做成階梯。根據試驗段內具體情況每隔一定距離開挖橫向排水溝，溝深5Ocm，將路基水引入縱向排水溝，排到路基外指定地點。經過2-3個自然日晾曬后，再用推土機去除表土，并集中堆放于工程師指定的棄土場，用于路基竣工后邊坡種植草皮。路基凊表〔三〕填前壓實1.根據土壤干濕情況，適當晾曬或灑水處理，在監理認可后進行填前碾壓，直至壓實度經檢測到達90%為止。2.經報檢壓實度仍不合要求的，再重新進行碾壓直至到達要求為止(以經監理工程師檢驗合格的試驗檢測報告為準)。填前壓實〔四〕路基填筑1.土方填筑〔1〕填前碾壓經監理工程師檢驗到達要求后，方可開始93區土方填筑。首先由測量隊伍用全站儀重新進行放樣，確定每20m中樁、邊樁以及坡腳位置，為保證路基邊緣壓實度，路基兩側各加寬填筑50cm。用水準儀測出該層填鋪厚度控制樁的標高〔松鋪系數初步定為1.16〕；〔2〕自卸汽車每車裝土14m3，按松鋪厚度30㎝計算，那么每車卸料面積為42m2。在填土范圍內按6m×7m方格灑灰線，施工現場由專人指揮車輛按網格卸土；〔3〕填筑采用縱向全斷面水平填筑，寬度比設計寬度每側寬50cm。路基填筑〔五〕標高、松鋪系數及平整度左中樁、邊樁標高，并標記出下一層松鋪厚度的位置、每一層填料完成后，必須重新對填料松鋪厚度頂標高進行復核。2.根據填筑前后高程差計算壓實厚度，推算松鋪系數。松鋪系數=〔松鋪高程-原地面或下承層高程〕/〔壓實后高程-原地面或下承層高程〕。3.攤鋪填料時采用推土機粗平，平地機精平和人工修補相集合的施工工藝。〔六〕碾壓及壓實度1.土方填筑〔1〕大足效勞區主線挖方段取土：93區土樣最大干密度為1.80g/cm3，最正確含水率為16.2%〔詳見附件檢測報告1S101031〕；94區土樣最大干密度為1.98g/cm3，最正確含水率為10.8%〔詳見附件檢測報告1S101099〕；96區土樣最大干密度為2.00g/cm3，最正確含水率為10.2%；〔詳見附件檢測報告1S101102〕；〔2〕填料經過晾曬，經檢測含水率在最正確含水率±2%時開始輾壓；〔3〕先用推土機(180型)推平，當初平好的鋪筑土層在最正確含水量左右時(由試驗人員抽檢)，再用壓路機(YZ18型)靜壓一遍后用平地機(PY180型)整平，再YZ18壓路機振動碾壓二遍后，試驗人員開始用灌沙法跟蹤檢測壓實度，直到到達標準，最后再用壓路機(YZ18型)靜壓一遍收光；〔4〕輾壓時先慢后快、先輕后重、由兩側至中間、輪跡重疊1/3、最大速度不超過2km/h，輾壓時應確保均勻，無漏壓、無死角、無明顯輪跡。2.壓實度〔1〕土方填筑壓實度檢測采用灌砂法，根據93、94、96分區要求不同分別控制壓實度到達93%、94%、96%以上。每次檢測壓實度時S＜2000㎡需檢測4個點，2000㎡≤S＜4000㎡時需檢測8個點，4000㎡≤S＜6000㎡時需檢測12個點，依次類推；〔2〕做壓實度實驗檢測時，確保灌砂粒徑符合標準要求，確保打洞深度和規格〔h=150cm的圓柱體〕；〔3〕每層輾壓開始后，試驗工程師在振動輾壓第二遍過后，每碾壓一遍檢測一次壓實度和含水率，并將檢測結果及時通知路基負責人并做好記錄。壓實度檢測四、數據統計〔一〕壓實度及含水率〔表一〕1.93區土方填筑〔6-9層〕序號層數碾壓第二遍壓實度/含水量碾壓第三遍壓實度/含水量碾壓第四遍壓實度/含水量碾壓第五遍壓實度/含水量碾壓第六遍壓實度/含水量碾壓第七遍壓實度/含水量1690.6/16.590.0/16.789.4/17.090.6/16.46.890.6/16.389.4/17.090.0/16.991.1/16.191.7/15.691.7/192.2/15.691.1/16.591.7/16.591.7/17.092.292.2/16.592.8/16.392.8/17.092.8/15.993.3/17.592.8/16.392.8/17.092.293.3/15.693.9/16.693.9/15.193.3/16.094.4/15.794.4/16.693.3/16.993.32790.6/16.090.6/16.389.4/17.090.66/16.389.4/17.090.6/16.191.7/15.591.1/16.391.1/17.092.2/15.991.7/16.591.7/16.591.7/16.092.292.2/17.592.8/16.392.2/17.093.3/15.992.8/17.592.2/16.393.3/17.092.893.9/15.694.4/16.693.3/16.193.9/16.094.4/15.794.4/16.693.3/16.993.93890.6/16.590.6/16.389.4/17.090.66.990.6/15.590.691.7/17.591.7/16.391.7/17.092.2/15.991.1/17.591.7/16.591.7/17.092.292.8/17.592.8/16.393.3/17.093.3/15.992.8/17.592.2/16.392.8/17.093.394.4/15.693.3/16.693.9/17.194.4/16.093.3/15.793.3/16.694.4/16.594.44990.6/16.490.6/16.389.4/17.090.66.891.1/16.089.4/17.090.6/16.191.7/17.591.7/16.391.7/17.092.2/15.991.7/17.591.7/16.591.1/17.092.293.3/17.592.8/16.392.8/17.092.8/15.992.2/17.592.8/16.392.2/17.093.394.4/16.093.3/16.693.9/16.194.4/16.093.3/15.793.9/16.693.3/16.994.4據上表分析：第二遍壓實后壓實度平均為90.3；第三遍壓實后壓實度平均為91.7；第四遍壓實后壓實度平均為92.8；第五遍壓實后壓實度平均為93.9。通過對以上結果的分析，第五遍壓實后壓實度能夠到達93%。2.94區土方填筑〔14-15層〕序號層數碾壓第二遍壓實度/含水量碾壓第三遍壓實度/含水量碾壓第四遍壓實度/含水量碾壓第五遍壓實度/含水量碾壓第六遍壓實度/含水量碾壓第七遍壓實度/含水量11490.5/111.389.4/11.090.5/111.590.5/11.389.4/11.090.0/10.991.5/11.491.5/11.391.0/12.092.0/101.391.5/11.691.0/12.092.0/11.492.5/11.692.0/11.392.5/12.092.5/10.992.5/11.593.0/11.393.0/12.092.0/10.993.5/11.693.5/10.693.0/11.194.0/121.794.5/11.693.5/10.993.0/12.195.1/11.394.5/11.694.5/11.894.0/111.595.1/111.294.5/12.221590.5/111.389.4/12.090.0/10.991.0/10.590.5/11.389.4/12.091.0/11.991.5/11.591.5/11.391.5/11.092.0/101.491.0/12.191.5/12.092.0/11.493.0/11.693.0/11.392.5/12.092.5/11.993.0/12.193.0/10.593.0/12.092.5/11.993.0/11.693.5/11.693.0/12.194.0/121.793.5/11.693.0/11.993.5/11.194.0/11.394.5/11.694.0/11.894.5/10.894.5/11.594.5/1021.2據上表分析：第二遍壓實后壓實度平均為90.2；第三遍壓實后壓實度平均為91.5；第四遍壓實后壓實度平均為92.7；第五遍壓實后壓實度平均為93.5；第六遍壓實后壓實度平均為94.7；通過對以上結果的分析，第五遍壓實后壓實度能夠到達93%、第六遍壓實后壓實度能夠到達94%。3.96區土方填筑〔17-18層〕序號層數碾壓第二遍壓實度/含水量碾壓第三遍壓實度/含水量碾壓第四遍壓實度/含水量碾壓第五遍壓實度/含水量碾壓第六遍壓實度/含水量碾壓第七遍壓實度/含水量11790.5/100.389.5/11.090.0/101.590.5/110.090.0/11.991.5/11.591.0/11.391.5/12.092.0/101.591.5/10.591.5/12.092.0/11.492.5/9.593.0/10.392.5/11.094.0/10.993.0/10.593.0/11.393.5/11.092.0/9.993.5/11.694.5/10.694.0/10.194.0/10.094.5/9.794.5/10.694.5/10.994.0/10.195.5/10.395.5/10.695.0/11.895.5/10.896.0/10.595.0/9.696.0/9.296.096.5/9.596.0/10.696.5/10.096.5/11.396.5/10.796.0/90.396.5/10.021890.5/111.389.5/11.090.0/11.990.5/10.590.5/102.090.0/10.991.0/11.591.5/10.391.5/11.092.0/111.591.0/11.591.5/11.092.0/11.491.5/10.592.0/10.392.5/9.693.5/11.992.0/11.591.5/10.392.0/10.093.5/10.994.5/111.694.0/10.194.5/1001.694.5/11.994.0/10.195.5/10.395.5/11.695.0/9.895.5/9.896.0/11.595.5/11.695.0/10.295.5/11.296.0/9.596.5/9.696.0/10.096.5/10.396.5/10.796.5/11.196.0/10.396.5/11.0據以上數據分析：第二遍壓實后壓實度平均為90.1%；第三遍壓實后壓實度平均為91.5%；第四遍壓實后壓實度平均為92.7%；第五遍壓實后壓實度平均為94.2%；第六遍壓實后壓實度平均為95.5%；第七遍壓實后壓實度平均為96.3%。通過對以上結果的分析，第五遍壓實后壓實度能夠到達93%、第六遍壓實后壓實度能夠到達94%、第七遍壓實后壓實度能夠到達96%。〔二〕松鋪系數〔表二〕1.93區〔6-9層〕層次樁號下層標高(m)本層松鋪高程(m)壓實后高程〔m〕松鋪厚度(cm)壓實厚度〔cm〕壓實系數6K54+393左樁38.12738.42538.38425.7左中樁38.36738.66638.62525.8右中樁38.32538.62138.58025.5右樁38.60038.89838.85525.5K54+458左樁38.04738.34338.30425.7左中樁38.28738.58438.54325.6右中樁38.28038.57938.53625.6右樁38.52038.81638.77525.5K54+496左樁37.96738.26338.22225.5左中樁38.20738.50538.46225.5右中樁38.1656038.42225.7右樁38.44038.73638.69725.7K54+535左樁37.88738.18438.14325.6左中樁38.12738.42338.38225.5右中樁38.12038.41838.37525.5右樁38.36038.65738.61625.67K54+393左樁38.37938.67538.63625.7左中樁38.62038.91738.87625.6右中樁38.58038.87538.83425.4右樁38.85539.15339.11225.7K54+458左樁38.30438.60038.55725.37左中樁38.54338.83938.79825.5右中樁38.53338.82938.78825.5右樁38.77539.07439.03526.0K54+496左樁38.22238.52038.48125.9左中樁38.46138.75838.71725.6右中樁38.42238.72138.67925.8右樁38.69138.98738.94625.5K54+535左樁38.13938.43538.39225.3左中樁38.37838.67238.63325.6右中樁38.37538.67138.63025.5右樁38.61638.91338.87225.68K54+393左樁38.72939.02238.98425.5左中樁38.96939.26439.22325.4右中樁38.96039.25839.21525.5右樁39.20039.49739.45625.6K54+458左樁38.63638.93338.892左中樁38.87439.17239.13325.9右中樁38.83439.13339.09225.8右樁39.10739.40339.36525.7K54+496左樁38.55738.85438.81325.6左中樁38.79839.09439.05325.5右中樁38.78839.08139.04325.5右樁39.03139.32639.29025.9K54+535左樁38.47838.77538.73425.6左中樁38.71739.01538.97225.5右中樁38.67338.96938.92825.5右樁38.94339.23939.20125.7K54+565左樁38.39238.68938.64825.6左中樁38.63338.92938.89125.7右中樁38.63038.92838.88725.7右樁38.87239.17139.12825.69K54+393左樁38.98239.28139.23525.3左中樁39.22339.52039.47925.6右中樁39.21139.50839.46525.4右樁39.45639.75039.71225.6K54+458左樁38.89239.19039.14925.7左中樁39.13339.42939.38825.5右中樁39.08539.38339.34025.5右樁39.36539.66239.62325.8K54+496左樁38.81339.10939.06925.5左中樁39.05339.34839.30825.4右中樁39.04139.33939.30025.9右樁39.28239.58139.54226.0K54+535左樁38.73439.03038.99125.7左中樁38.97239.27039.22825.7右中樁38.92839.22739.18625.8右樁39.20139.50039.46126.0K54+565左樁38.64338.93938.89925.5左中樁38.89139.18739.14625.5右中樁38.88739.18339.14425.7右樁39.12839.42639.38025.32.94區〔14-15層〕層次樁號下層標高(m)本層松鋪高程(m)壓實后高程〔m〕松鋪厚度(cm)壓實厚度〔cm〕壓實系數14K54+373左樁41.93642.23442.19726.1左中樁42.17642.47442.43325.7右中樁42.16142.45842.41725.6右樁42.40142.70042.65725.6K54+393左樁41.84942.14542.10625.7左中樁42.08942.38442.34325.4右中樁42.08042.37842.33525.5右樁42.32042.61942.57325.3K54+458左樁41.76742.06342.02425.7左中樁42.00742.30442.26826.1右中樁41.96542.26342.22425.9右樁42.24042.53542.49725.7K54+496左樁41.68741.98341.94225.5左中樁41.92742.22442.18325.6右中樁41.92042.21742.17825.8右樁42.16042.45742.41625.6K54+535左樁41.60741.90341.86225.5左中樁41.84742.14542.10625.9右中樁41.80542.10242.06626.1右樁42.08042.37942.33625.6K54+565左樁41.52741.82141.78325.6左中樁41.76742.06242.02125.4右中樁41.76042.05642.01525.5右樁42.00042.29742.25825.815K54+373左樁42.19742.49542.45425.7左中樁42.43342.72942.68825.5右中樁42.41742.71442.67325.6右樁42.65742.95642.91726.0K54+393左樁42.10642.40542.36225.6左中樁42.34342.63942.59825.5右中樁42.33542.63242.59125.6右樁42.57342.86842.82825.4K54+458左樁42.02442.32342.28225.8左中樁42.26842.56542.52625.8右中樁42.22442.52242.48125.7右樁42.49742.79242.74925.2K54+496左樁41.94242.23642.19625.3左中樁42.18342.48042.43925.6右中樁42.17842.47442.43325.5右樁42.41642.71342.67425.8K54+535左樁41.86242.16042.12125.9左中樁42.10642.40442.36325.7右中樁42.06642.36342.32225.6右樁42.33642.63242.59125.5K54+565左樁41.78342.07942.03625.3左中樁42.02142.31842.28025.8右中樁42.01542.31242.27125.6右樁42.25842.55642.51525.73.96區〔17-18層〕層次樁號下層標高(m)本層松鋪高程(m)壓實后高程〔m〕松鋪厚度(cm)壓實厚度〔cm〕壓實系數17K54+373左樁42.70843.00442.96325.5左中樁42.94943.24743.20825.9右中樁42.93443.22843.18825.3右樁43.17843.47443.43325.5K54+393左樁42.62342.92242.88125.8左中樁42.85943.15643.11825.8右中樁42.85243.14943.11025.8右樁43.08943.38543.34425.5K54+458左樁42.54342.83942.79825.5左中樁42.78743.08543.04125.5右中樁42.74243.03942.99625.4右樁43.01043.30643.26525.5K54+496左樁42.45742.75642.71425.8左中樁42.70042.99742.95425.4右中樁42.69442.99142.95025.6右樁42.93543.23343.19425.9K54+535左樁42.38242.68142.64025.8左中樁42.62442.92042.87925.5右中樁42.57642.87342.83225.6右樁42.85243.14943.10825.6K54+565左樁42.29742.59542.55125.5左中樁42.54142.83742.79825.7右中樁42.53242.82942.78825.6右樁42.77643.07443.03525.918K54+373左樁42.96343.26243.22326.0左中樁43.20843.50543.46225.4右中樁43.18843.48643.44425.7右樁43.43343.72943.68825.5K54+393左樁42.88143.17843.13725.6左中樁43.11843.41443.37525.7右中樁43.11043.40543.36425.4右樁43.34443.64343.60225.8K54+458左樁42.79843.09343.05325.4左中樁43.04143.33743.29425.3右中樁42.99643.29243.25125.5右樁43.26543.56443.52325.8K54+496左樁42.71443.01242.974