本文選題：路基工程 + 路基填料��； 參考：《交通運(yùn)輸工程學(xué)報(bào)》2014年03期

【摘要】：選取了4種代表性風(fēng)化巖,分析了其級(jí)配組成、擊實(shí)參數(shù)與破碎特性,研究了風(fēng)化巖路基長(zhǎng)期穩(wěn)定性的影響因素。開(kāi)發(fā)了能夠模擬路基填料自然風(fēng)化的水溫循環(huán)試驗(yàn)方法,研究了風(fēng)化程度對(duì)風(fēng)化巖填料加州承載比和水溫敏感性的影響與水溫循環(huán)效應(yīng)對(duì)風(fēng)化巖性質(zhì)的影響。采用物理風(fēng)化與化學(xué)風(fēng)化相結(jié)合的評(píng)價(jià)方法,提出以風(fēng)化特征指數(shù)作為風(fēng)化程度的評(píng)價(jià)指標(biāo),分析了風(fēng)化特征指數(shù)與各項(xiàng)路用性能的相關(guān)性,并建立了基于各項(xiàng)路用性能的風(fēng)化程度分級(jí)標(biāo)準(zhǔn)。分析結(jié)果表明:隨著風(fēng)化程度的加大,風(fēng)化巖力學(xué)性能與水溫敏感性降低;應(yīng)用水溫循環(huán)模擬試驗(yàn)?zāi)軌蚺袆e風(fēng)化巖的長(zhǎng)期路用性能;風(fēng)化特征指數(shù)與風(fēng)化巖路用性能決定系數(shù)大于0.85,相關(guān)性良好,可用來(lái)判定風(fēng)化巖的風(fēng)化程度與路用性能;選用風(fēng)化特征指數(shù)為0.78的風(fēng)化巖鋪筑試驗(yàn)路,經(jīng)18個(gè)月觀測(cè)的路基最大沉降為7.8cm,路用性能良好。
[Abstract]:Four typical weathered rocks are selected, their gradation composition, compaction parameters and fracture characteristics are analyzed, and the factors influencing the long-term stability of weathered rock subgrade are studied. A water temperature cycling test method is developed to simulate natural weathering of embankment fillers. The effects of weathering degree on the bearing ratio and water temperature sensitivity of weathered rock fillers in California and the effects of water temperature cycling effects on the properties of weathered rocks are studied. With the combination of physical weathering and chemical weathering, the weathering characteristic index is put forward as the evaluation index of weathering degree, and the correlation between weathering characteristic index and road performance is analyzed. The classification standard of weathering degree based on each road performance is established. The results show that the mechanical properties and water temperature sensitivity of weathered rocks decrease with the increase of weathering degree, and the long-term road performance of weathered rocks can be judged by water temperature cycle simulation test. The weathering characteristic index and the determining coefficient of road performance of weathered rock are greater than 0.85, and the correlation is good, which can be used to judge the weathering degree and road performance of weathered rock, and the weathering characteristic index of 0.78 is used to construct the test road of weathering rock. The maximum settlement of the roadbed observed for 18 months is 7.8 cm, and the road performance is good.
【作者單位】： 長(zhǎng)安大學(xué)特殊地區(qū)公路工程教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51278059)
【分類號(hào)】：U416.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 胡瑞林;岳中琦;王立朝;曲永新;王思敬;;斜長(zhǎng)石溶蝕度:一種評(píng)價(jià)花崗質(zhì)巖石風(fēng)化度的新指標(biāo)[J];地質(zhì)論評(píng);2005年06期

2 魏偉;沈軍輝;苗朝;劉海;李剛;聶德新;;風(fēng)化、蝕變對(duì)花崗斑巖物理力學(xué)特性影響分析[J];工程地質(zhì)學(xué)報(bào);2012年04期

3 顏波;湯連生;胡輝;王大志;林國(guó)威;;花崗巖風(fēng)化土崩崗破壞機(jī)理分析[J];水文地質(zhì)工程地質(zhì);2009年06期

4 李日運(yùn),吳林峰;巖石風(fēng)化程度特征指標(biāo)的分析研究[J];巖石力學(xué)與工程學(xué)報(bào);2004年22期

5 劉新喜;夏元友;劉祖德;陳向陽(yáng);寧齊元;;復(fù)雜應(yīng)力下強(qiáng)風(fēng)化軟巖濕化變形試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2006年05期

6 劉潤(rùn);閆s，

本文編號(hào)：1780165