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      歡迎來到肥城聯誼工程塑料有限公司!
      熱門關鍵詞: 單向土工格柵| 滌綸土工格柵| 土工格柵| 山東土工格柵廠家| 肥城聯誼工程塑料有限公司|
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      淺談土工格柵對路床底部的加固
      日期:2020年 11月 16日 共閱:249次 文章來源:山東肥城聯誼工程塑料有限公司
             為確保工程質量,速公路改擴建項目管理處不斷優化設計,重視推廣應用新材料鋼塑土工格柵、新工藝,以確保工程質量。鋼塑土工格柵在底基層采用水泥粉煤灰碎石基層,利用水泥水化硬化快提供早期強度,粉煤灰的火山灰活性提高抗溫縮性能。
             鋼塑土工格柵實踐證明水泥粉煤灰穩定碎石基層溫縮裂縫明顯減少。對臺背進行注漿加固,處理臺背沉陷質量通病;用雙向鋼塑土工格柵等進行路床加固,路面拼接中,在底層頂部鋪設鋼塑土工格柵,拼縫豎向界面使用橡膠止水帶。
             針對建設出現的橋面早期病害,在橋面施工中,使用環氧瀝青,爭搶瀝青混合料的粘結性,提高道路的高溫穩定性和低溫抗裂性,抗疲勞性和水溫性能,抵抗化學物質侵蝕,解決重載交通和橋面鋪裝存在的早期破壞和耐久性不足的問題。鋼塑土工格柵中面層采用改性瀝青混合料,添加高模量劑,提高承載能力,解決車轍耐久性達8年。
             防止路基下沉即是對路床底部的加固,發揮塑料土工格柵最大的優勢,對一般土質路基縱向填挖交接處以及半填半挖路基采用士工格棚加筋處理時,要求其縱橫向極限抗拉強度不小于0/n,填土高度小于等于3時,鋪設-層土工格柵,塑料土工格柵精鋪于路面地面以ox處,即路床底部;填土高度大于時,在第一層土工格柵下1處增設一屬土工格柵,路基的壓實度要求達到e,以確保路基的穩定性。

             另外當地面橫坡較陡不適宜挖臺階時,可對原地面采腫夯或強夯處理。土工格柵的作用是用于路基補強,使粒狀填料與網格互相鎖合在一起,形成穩定的平面,防止填料下陷,并可將垂直載苛分散,地理條件惡劣地區可采夠層補強;使網榕與路面材料摻合在一起,可以有效地分散傳遞獻荷,防止路面裂紋,另外還可承受-定沖擊裁荷、 較大的交變獻荷,因此對路基工程施工來說作腓常大。

      土工格柵

            (1)首先準確放出路基邊坡線,為了保證路基寬度,每側各加寬0.5m,把晾曬好的基底士進行整平后用25T振動壓路機靜壓兩遍,再用50T震壓四遍,不平整的地方人工配合整平。
            (2)鋪墊0.3m厚的中(粗)砂,人工配合機械整平后,25T的振動壓路機靜壓兩遍。
            (3)鋪設土工格柵,土工格柵鋪設時底面應平整、密實,一般應平鋪, 拉直、不得重蠱,不得卷曲、扭結,相鄰的兩幅士工格柵需搭接0.2m,并沿路基橫向對土工格柵搭接部分每隔1米用8號鐵絲進行穿插連接,并在鋪設的格柵.上,每隔1.5-2m用U型釘固定于地面。
            (4)首層土工格柵鋪好后,開始填設第二層0.2m厚的中(粗)砂,其方法:汽車運砂到工地卸于路基- -側,而后用推土機向前趕推,先把路基兩側2米范圍內填筑0.1m后,把首層土工格柵折翻上來再填上0.1米的中(粗)砂,禁止兩側向中間填筑和推進,禁止各種機械在沒有填筑中(粗)砂的土工格柵.上通行作業,這樣能保證土工格柵平整,不起鼓,不起皺,待第_二層中(粗)砂平整后,要進行水平測量,防止填筑厚度不均勻,待抄平無誤后用25T振動壓路機靜壓兩遍。
             相信大家看完以上內容以后,應該也對土工格柵對路床底部的加固有所了解了,希望會對大家有所幫助吧。
             本文詞標簽:土工格柵
            文章地址:http://www.cliffsqjet.com/news_detail.asp?id=4754
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