【摘要】：對未改性淤泥和石灰改性淤泥進行無側限抗壓強度試驗,得到了長期養(yǎng)護90 d和360 d試樣的應力應變關系、抗壓強度、變形模量和破壞應變。通過固結排水直接剪切試驗,得到淤泥固化前后的剪切應力位移關系、凝聚力和內摩擦角。結果表明:石灰的摻入使試樣破壞應變明顯減小,無側限抗壓強度和變形模量顯著增加;石灰摻量達到某種程度后,繼續(xù)添加石灰并不能改善土體力學性質,反而會引起劣化效果;抗壓強度與變形模量之間服從線性關系,抗壓強度與破壞應變之間服從冪函數(shù)關系;石灰摻量和法向壓力變化會誘發(fā)試樣剪切應力位移曲線發(fā)生變化;石灰可有效提高淤泥試樣的凝聚力,但對內摩擦角并無顯著影響。
[Abstract]:The unmodified silt and lime modified silt were tested under unconfined compressive strength. The stress-strain relationship, compressive strength, deformation modulus and failure strain of the specimens for 90 days and 360 days of long-term curing were obtained. Through direct shear test of consolidation drainage, the shear stress displacement relation, cohesion and internal friction angle of silt before and after solidification are obtained. The results show that the failure strain of the specimen is obviously decreased and the unconfined compressive strength and deformation modulus are obviously increased with the addition of lime. When lime is added to a certain extent, the mechanical properties of soil can not be improved by adding lime, on the contrary, the degradation effect will be caused, the relationship between compressive strength and deformation modulus is linear, the relationship between compressive strength and failure strain is power function, the relationship between compressive strength and failure strain is power function. The change of lime content and normal pressure will induce the change of shear stress-displacement curve, lime can effectively improve the cohesion of silt specimen, but has no significant effect on the angle of internal friction.
【作者單位】： 國核電力規(guī)劃設計研究院;武漢大學土木建筑工程學院;
【基金】：中國礦業(yè)大學深部巖土力學與地下工程國家重點實驗室開放基金項目(SKLGDUEK1506) 武漢大學中央高�；究蒲袠I(yè)務費專項資金項目(2042016kf0048)
【分類號】：TU447

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