本文關(guān)鍵詞：含水率對(duì)路基壓實(shí)土小應(yīng)變剪切模量的影響規(guī)律　出處：《巖土力學(xué)》2017年05期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 壓實(shí)土 剪切模量 含水率 壓實(shí)度 稠度 黏粒含量

【摘要】：運(yùn)營(yíng)期內(nèi)路基土的含水率會(huì)由初始碾壓含水率逐漸增大至平衡含水率,含水率的變化將會(huì)導(dǎo)致路基土路用性能的演化。結(jié)合已有文獻(xiàn)中壓實(shí)土剪切模量隨含水率變化的實(shí)測(cè)結(jié)果與室內(nèi)補(bǔ)充試驗(yàn)數(shù)據(jù),研究了不同條件下含水率及壓實(shí)度對(duì)壓實(shí)土剪切模量的影響規(guī)律。結(jié)果表明:壓實(shí)度不變時(shí),路基土剪切模量隨含水率的增加而減小,且壓實(shí)度越大,剪切模量降低得越快;在低含水率下,剪切模量隨壓實(shí)度的增大而增加,但在較高含水率下,剪切模量隨壓實(shí)度先增加后降低,且峰值模量對(duì)應(yīng)的壓實(shí)度隨含水率的增加而減小;峰值剪切模量對(duì)應(yīng)的含水率略小于最大干密度對(duì)應(yīng)的最優(yōu)含水率;壓實(shí)土剪切模量隨稠度呈先增大、后減小的趨勢(shì),但不同黏粒含量的土體獲得峰值剪切模量的稠度狀態(tài)不同,且峰值模量對(duì)應(yīng)的稠度與黏粒含量具有良好函數(shù)關(guān)系。
[Abstract]:During the operation period, the moisture content of subgrade soil will gradually increase from initial rolling moisture to equilibrium water content. The change of moisture content will lead to the evolution of roadbed soil performance. Combined with the measured results of the shear modulus of compacted soil with the change of moisture content and the indoor supplementary test data. The effect of water content and compaction on the shear modulus of compacted soil is studied under different conditions. The results show that the shear modulus of subgrade soil decreases with the increase of moisture content and increases with the increase of compaction degree. The faster the shear modulus decreases; At low water content, the shear modulus increases with the increase of compaction degree, but at higher water content, the shear modulus increases first and then decreases, and the compaction degree corresponding to the peak modulus decreases with the increase of moisture content. The moisture content corresponding to the peak shear modulus is slightly smaller than the optimal moisture content corresponding to the maximum dry density. The shear modulus of compacted soil increases first and then decreases with consistency, but the consistency of peak shear modulus is different with different clay content. The consistency corresponding to the peak modulus has a good functional relationship with the clay content.
【作者單位】： 東南大學(xué)交通學(xué)院;東南大學(xué)江蘇省城市地下工程與環(huán)境安全重點(diǎn)實(shí)驗(yàn)室;宿遷市交通工程質(zhì)量監(jiān)督站;
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金項(xiàng)目(No.2242014R30020) 宿遷市交通運(yùn)輸局科技課題(No.201310) 江蘇省高�！扒嗨{(lán)工程”優(yōu)秀青年骨干教師培養(yǎng)對(duì)象資助項(xiàng)目~~
【分類(lèi)號(hào)】：U416.1
【正文快照】： This work was supported by the Fundamental Research Funds for the Central Universities(2242014R30020),the Science and Technology Project of Traffic andTransport Bureau of Suqian City(201310),and the Personnel Training Fund for Outstanding Young Teacher o

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本文編號(hào)：1402595