加筋条件和含水率对加筋土抗压强度和应力应变的影响-吉林大学学报.PDFVIP

41 3 ( ) Vol. 41 No.3 201105 Journal of Jilin University( Earth Science Edition) ay 2011 加筋条件和含水率对加筋土 抗压强度和应力应变的影响 1 2 3 王生新 , 柴寿喜, 王晓燕 1., 730000 2., 300384 3. , 300222 : 由滨海盐渍土的盐胀溶陷和吸湿软化引起的土的低强度和大变形问题, 可通过麦秸秆 筋的 方法予以应对 筋土的抗压强度及应力应变特性与麦秸秆的 筋长度 筋率和土的含水率有关 筋土的抗压强度试验结果证实: 0. 25% 筋率的 筋土抗压强度最大,0.20% 和0.30% 的次之; 50 mm 筋长度 筋土的抗压强度最大, 70 mm 的最小0. 25% 筋率的 筋土应力应变曲线的峰值最大;随 筋 长度的增 , 筋率对应力应变的影响程度降低随 筋长度的增 , 筋土的应力应变曲线由应变软化 型渐变为应变硬化型, 以70 mm 筋长度的最为明显低于最优含水率,应力应变曲线存在峰值; 高于最 优含水率, 筋土逐渐转向塑性变形总结麦秸秆 筋土的抗压强度和应力应变的变化规律, 为后期的三 轴抗剪强度及其偏应力应变特性研究提供借鉴 : 抗压强度;应力应变; 筋条件;含水率; 麦秸秆;盐渍土; 重型击实 : TU 443 :A 2011) Effect of Reinforcement Condition and Water Content on Compressive Strength and StressStrain of Compaction Soil with Wheat Straw 1 2 3 WANG Shengxin , CHAI Shouxi , WANG Xiaoyan 1. Geo log ica l H az ar ds Res ear ch and P rev en ti on I ns ti tu te , Gans u A cade my of Sci ence s, L anz ho u 730000, Chi na 2. Ti an i n K ey L abo rat or y of S of t So i l Char acte r is ti cs and Eng ine er i ng En vi r onment , Ti an i n I n st i tut e of Ur ban Co nst ru cti o n, T ian in 300384, China 3. I ns t it ut e of I n ve s tigat i on , China Water Res o urce s, Beif ang I nv es t ig ati o n, D es ign and Res ear ch Co . L td . , T i an i n 300222, Chi na Abstract: Inferior strength and more deformation resulted from salt expansion, dissolution and water absorption, are overcome by means of reinforcement with wheat straw. Reinforced ratio, reinforced length a