CAJ | 학술논문

为考察片岩残积土的剪切特性，结合鄂西北山区某边坡工程，开展了风化岩残积土大型原位直剪试验，研究了风化岩残积土的结构组成、剪切面破损特性、剪切强度特性及其含石率、起伏度等相关关系。结果表明：该风化岩残积土应力-应变曲线多呈应变硬化特征，无明显峰值；束状孤石和束状石组多为翻滚和啃断破坏，起伏度随含石率的增大而增大，近似呈线性关系；爬坡效应会引起剪胀，造成剪应力和垂直应力的增大；随着垂直应力的增大，剪切破坏机制逐渐由滑移破坏变为啃断破坏，剪压应力比（剪应力与垂直应力的比值）逐渐减小。研究成果可为边坡工程变形及稳定性分析提供参考。
위고찰편암잔적토적전절특성，결합악서북산구모변파공정，개전료풍화암잔적토대형원위직전시험，연구료풍화암잔적토적결구조성、전절면파손특성、전절강도특성급기함석솔、기복도등상관관계。결과표명：해풍화암잔적토응력-응변곡선다정응변경화특정，무명현봉치；속상고석화속상석조다위번곤화습단파배，기복도수함석솔적증대이증대，근사정선성관계；파파효응회인기전창，조성전응력화수직응력적증대；수착수직응력적증대，전절파배궤제축점유활이파배변위습단파배，전압응력비（전응력여수직응력적비치）축점감소。연구성과가위변파공정변형급은정성분석제공삼고。
To study the shear property of weathered schist residual soil, in-situ direct shear tests was carried out at a slope project in northwest mountain area of Hubei province; and the structural composition, fracture characteristics, relationship of stone ratio and waviness and so on were analyzed. The results show that:The stress and strain curves show strain hardening features, and no obvious peak. The lonely stone and cluster stones are rolling and gnawing fracture in shear surface. There is an approximate linear relationship between waviness of shear surface and stone ratio;and the value of waviness increases with the increase of stone ratio. The climbing effect may cause shear dilation and increase of shear stress and normal stress. With increase of normal stress, the failure mechanism in shear surface turns sliding into gnawing fracture;and the ratio of shear-normal stress is in decrease. The results can be referenced for deformation and stability analysis of slope projects.