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軟土路基外文翻譯--論公路路基施工技術(shù)-公路隧道-免費閱讀

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【正文】 with the impact of edge of embankment paction pressure of realtime machine speed should be slower, or may cause the body slid off the embankment。擋土墻用于支擋防護目前仍占主要。但由于石砌圬工及混凝土防護存在造價高、易破損等諸多問題。三是設(shè)計泄水孔以迅速排除橋面水。 ② 強夯施工:又稱動力固結(jié)法,是用起重機械將 8t~ 40t 夯錘起吊到 6m~ 25m高度后,自由落下,給 地基以強大的沖擊能量的夯擊,使土中出現(xiàn)沖擊波和沖擊應(yīng)力,迫使土體孔隙壓縮,土體局部液化,在夯擊點周圍產(chǎn)生裂隙,形成良好的排水通道,孔隙水和氣體逸出,使土粒重新排列,經(jīng)時效壓密達到固結(jié),從而提高地基承載力,降低其壓縮性的一種有效地基加固方法。 ( 2)黃土路基的壓實。 路基壓實 當前路基施工,普遍采用了大噸位的壓路機,碾壓效果有了明顯的改善。 3 論公路路基施工技術(shù) 1 引言 公路路基施工是整個公路施工工程的關(guān)鍵所在,稍有偏差,將給整個工程埋下質(zhì)量隱患。 1 畢業(yè)設(shè)計 ( 論文 ) 外文翻譯 學(xué)生姓名: 院(系): 專業(yè)班級: 指導(dǎo)教師: 完成日期: 2 要 求 (論文)的主要內(nèi)容之一,學(xué)生必須獨立完成。例如,在公路施工中常會遇到諸如軟土路基,黃土路基等不良路基,如不加以特別處理,會引起填方路堤施工后沉降或不均勻沉陷,路面縱橫坡變碎,平整度下降,導(dǎo)致行車顛簸等,嚴重影響公路的正常使用,造成大量的人力、物力、財力浪費。對于提高路基土的壓實度起了很好的作用。與其他公路路基黏性土相比,黃土尤其 易受水的侵害,是一種特殊的黏性土。 3 路基排水 水是影響路基強度和穩(wěn)定性的一個重要因素,水的侵蝕會造成許多路基病害的。四是采用瀝青封層、土路肩縱橫向碎石盲溝或排水管將滲入路面面層的水引出路基之外。現(xiàn)在,種草防護技術(shù)應(yīng)用較為廣泛,邊坡較高則采用砌石框格種草防護,起到改善生態(tài)環(huán)境、美化景觀和坡面防護的三重效果。 ① 石砌的重力式擋土墻多用于石料豐富、墻高較低、地基較好的場合; ② 鋼筋混結(jié)構(gòu)的懸臂式擋土墻、扶壁式擋土墻和板柱擋土墻其受力比較合理,墻身圬工體積小,也已廣泛應(yīng)用于公路路基的防護; ③ 垛式擋土墻易于調(diào)整墻的高度,并采用預(yù)制構(gòu)件拼裝,是一種特殊形式的擋土墻。 Stamping should pay attention to the continuity of the tracks, especially at the Uturn, do not affect the reserved space with the paction effect. ② dynamic paction of construction: also known as dynamic consolidation method is used to 8t ~ 40t crane lifting hammer to 6m ~ 25m height, free fall, to the foundation with a strong impact energy of tamping, so that shock waves appear in the soil and the impact of stress, forcing pressed soil porosity, soil partial liquefaction, resulting in tamping points around the crack, forming a good drainage channel, pore water and gas escape, so that soil particles rearrange, paction achieved by the time of consolidation, which improve the bearing capacity, reduce the pression of an effective foundation reinforcement methods. 3 subgrade drainage Subgrade strength and influence of water is an important factor in stability, water erosion can cause many diseases of the roadbed. Meanwhile, from the local environmental protection and water conservancy facilities, without prejudice to consideration, must be prepared subgrade drainage, the formation of drainage systems, and coordination with regional drainage plan to prevent flooding due to various causes, to the embankment, causing unnecessary road construction the loss. Highway drainage include two aspects: First, underground drainage, a reduction of groundwater, farmland irrigation discharge stability and strength of the impact of the roadbed。 before pressing each layer should be punching along the edge of the first five times around the base to reduce the impact energy in the process of stamping 8 the lateral pression of the embankment。 ( 3)支擋防護。通常措施是采用石砌圬工防護,混凝土預(yù)制塊護坡多用在路堤邊坡,連片的
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