CAJ | 학술논문

通过直剪慢剪实验，改变筋材棕榈的加筋率及尺寸，研究棕榈作为加筋材料对上海粘土强度特性的影响。试验表明：①同素土相比，加筋土的抗剪强度和粘聚力明显提高，但内摩擦角的变化较小。②棕榈尺寸为4 mm ×12 mm的抗剪强度高于4 mm ×4 mm、4 mm ×8 mm和4 mm ×16 mm的抗剪强度，且加筋土的最优加筋率为0．5％。③垂直压力较小时，应力应变曲线呈应变软化型，随着垂直压力的增加，应力应变曲线呈应变硬化型。④同素土相比，加筋土残余强度降低，使得土体的抗变形能力提高。因此，棕榈不失为一种加固上海粘土强度的优良筋材。
통과직전만전실험，개변근재종려적가근솔급척촌，연구종려작위가근재료대상해점토강도특성적영향。시험표명：①동소토상비，가근토적항전강도화점취력명현제고，단내마찰각적변화교소。②종려척촌위4 mm ×12 mm적항전강도고우4 mm ×4 mm、4 mm ×8 mm화4 mm ×16 mm적항전강도，차가근토적최우가근솔위0．5％。③수직압력교소시，응력응변곡선정응변연화형，수착수직압력적증가，응력응변곡선정응변경화형。④동소토상비，가근토잔여강도강저，사득토체적항변형능력제고。인차，종려불실위일충가고상해점토강도적우량근재。
Adopting palm as a reinforcement material which was added into shanghai clay,the paper car-ried out direct slow shear test so as to study the effect of palm on the strength characteristics of Shanghai clay by changing the reinforcement ratio and palm size of reinforcing material.The results show that ①Compared with the pure soil, the reinforced soil shear strength and cohesion are improved significantly, but angle change of internal friction is smaller.② The shear strength of size of 4mm ×12mm is bigger than that of the size of 4mm ×4mm,4mm ×8mm and 4mm ×16mm,and the optimal rate of reinforcement is 0.5%.③When the vertical load is small, the stress-strain curve possesses strain softening.But with the increase of vertical load , the stress-strain curve is strain hardening.④ Compared with pure soil, the residual strength of reinforced soil is reduced , and its capicity of resistance deformation is enhanced. Therefore, the palm can be used as an effective material for reinforcing Shanghai clay.