軟土路基外文翻譯--論公路路基施工技術(shù)-公路隧道(完整版)
【正文】 sion。 by impact pactor models limit the length of the embankment by the general press of not less than 120m, width of not less than 15m。傳統(tǒng)的方法是用砌石、拋石、鐵絲石籠和擋土墻防護(hù)，改進(jìn)后可以用高強(qiáng)土工格柵代替鐵絲做石籠，用聚脂或聚胺脂類土工織物混凝土護(hù)坡模袋做成的護(hù)面板防護(hù)受水沖擊的邊坡，很能適應(yīng)土體不均勻沉降。坡面防護(hù)的目的是防止地表水流的沖刷、坡面巖土的風(fēng)化剝落以及與環(huán)境的協(xié)調(diào)。路表排水設(shè)計(jì)，一是可以通過路面橫坡、邊溝、邊溝急流槽等將路表水迅速排出路基以外。沖擊壓實(shí)技術(shù)只適合于淺層濕陷性及濕軟性黃土地基的處理， 且其有效影響深度一般不超過 80cm，沖壓遍數(shù)以30 遍左右為宜。過濕土地基的填筑比較簡單，一般采用填砂礫墊層和加鋪土工格柵的方法，該方法簡單易行，處理效果較好。對路基填料的最小強(qiáng)度和最大粒徑給了量化的標(biāo)準(zhǔn)，采用承載比實(shí)驗(yàn)（ CBR）值表征路基土的強(qiáng)度，引入了路床的概念。 ，用阿拉伯?dāng)?shù)字書寫，要符合《關(guān)于出版物上數(shù)字用法的試行規(guī)定》，如“ 2020 年 2 月 15日”。 A4 紙打印。 2 路基填壓 公路路基的強(qiáng)度和穩(wěn)定性很大程度取決于路基填料的性質(zhì)及其壓實(shí)的程度。此外，還增加了對路堤基底的壓實(shí)度不宜小于 93％的規(guī)定。 4 其中，濕陷性黃土主要分布在我國中西部地區(qū)，其作為路堤填筑材料時(shí)，由于 水浸濕后，本身結(jié)構(gòu)被迅速破壞，應(yīng)有強(qiáng)度減小，若施工不當(dāng)則會發(fā)生很大的下沉量，引起路基失穩(wěn)，特別是高路堤地段的填筑更是會引發(fā)一系列的工程病害。 公路排水主要包括兩個方面 ：一是地下排水，即減少地下水、農(nóng)田排灌水對路基穩(wěn)定性及其強(qiáng)度的影響；二是路表排水，除將路面、地面的水迅速排出之外，應(yīng)最大限度地減少雨水對路基、路面質(zhì)量的影響，減少因路表水排水不暢或路表水下滲對路基、路面結(jié)構(gòu)和使用性能產(chǎn)生的損害。由于通過瀝青面層下滲的水量有限，設(shè)計(jì)中應(yīng)在每 10m 左右設(shè)置一道 Ф5cm橫向排水管以確保路 面下滲水的排除。破裂的 或易于風(fēng)化破碎的巖石路塹邊坡采用錨桿掛鐵絲網(wǎng)或高強(qiáng)塑料網(wǎng)格噴漿或噴射混凝土以及噴射纖維混凝土防護(hù)也有較好的效果。s climate, bined with the construction of such fill and cut Fang Pingheng to select the construction method. 2 roadbed fill pressure Road subgrade strength and subgrade stability largely depends on the nature and degree of paction. Starting from the existing conditions, requirements and pacted fill to improve conditions is to ensure the quality and costeffective way to subgrade. subgrade The existing roadbed design specification (hereinafter referred to as norms) provides for the embankment fill requirements. The minimum strength of the subgrade and the maximum size for a quantitative standard, using Bearing Ratio test (CBR) value of the strength of the subgrade soil characterization, the introduction of the concept of the road bed. Of fill material for road beds proposed restrictions, highway and a road surface at the end of the following 0cm30cm road bed fill, the CBR value should be greater than 8, the next road on the bed and fill the following provisions also give the corresponding value. Subgrade paction The current roadbed construction, generally with a large tonnage of rollers, rolling effect has been significantly improved. For improving the degree of paction of subgrade soil played a positive role. Specification of the underside of the highway 150cm part of the road embankment paction degree must ≥ 95%, when the paved road to the other senior level surface, 7 its degree of paction should also highway and a class road from the criterion used. In addition, it increased the degree of paction of the embankment base of not less than 93% of the requirement. With the rapid development of highway roadbed construction technology has also made considerable progress, for special subgrade treatment technology has bee mature and improve. (1) wet areas embankment filling pressure. Through wet soil filling the foundation is r
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