本文關(guān)鍵詞： 壓實變形特征 靜力壓實試驗 紅砂巖粗粒土 粗粒含量　出處：《公路》2017年01期 　論文類型：期刊論文

【摘要】：為研究粗粒含量對紅砂巖土靜力壓實變形特征的影響,利用自制裝置在電子萬能試驗機上進行靜力壓實試驗,得到6種不同粗粒含量紅砂巖土靜力壓實試驗的壓力-位移關(guān)系,分析粗粒含量對靜力壓實變形特征的影響。結(jié)果表明:不同粗粒含量紅砂巖土在靜力壓實過程中的應力與應變符合指數(shù)關(guān)系;在相同的應力作用下,當粗粒含量為60%時,土體產(chǎn)生的應變最大;不同粗粒含量紅砂巖土的壓縮模量與對應應力范圍終值之間呈線性關(guān)系,在相同應力范圍內(nèi),當粗粒含量為60%時土體的壓縮模量最小,壓縮性最高;紅砂巖粗粒土的靜力壓實過程可分為3個階段,分別為壓密階段、破碎階段和穩(wěn)定階段;在靜力壓實過程中,應變增長存在拐點;應變拐點的出現(xiàn),標志著紅砂巖粗粒土靜力壓實過程變形階段的轉(zhuǎn)變。
[Abstract]:In order to study the influence of coarse grain content on the static compaction deformation characteristics of red sandstone soil, a static compaction test was carried out on an electronic universal testing machine with self-made apparatus, and the pressure-displacement relationship of six different coarse grained red sandstone soil static compaction tests was obtained. The effect of coarse grain content on the deformation characteristics of static compaction is analyzed. The results show that the stress and strain of red sandstone soil with different coarse grain content conform to the exponential relationship during static compaction, and when the coarse grain content is 60, under the same stress, The compressive modulus of red sandstone soil with different coarse grain content is linear with the end value of corresponding stress range. In the same stress range, when the coarse grain content is 60, the compression modulus of soil is the smallest and the compressibility is the highest. The static compaction process of red sandstone coarse grained soil can be divided into three stages, namely, compaction stage, crushing stage and stable stage, in the static compaction process, the strain growth has inflection point, the strain inflection point appears, It marks the transformation of deformation stage during static compaction of coarse grained red sandstone soil.
【作者單位】： 江西理工大學建筑與測繪工程學院;江西理工大學資源與環(huán)境工程學院;
【基金】：國家自然科學基金項目,項目編號51204076;51304084 江西省自然科學基金項目,項目編號20122BAB206035 江西省教育廳科技項目,項目編號GJJ13408
【分類號】：U416.1

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