加筋条件和含水率对加筋土抗压强度和应力应变的影响

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，可通过麦秸秆加筋的方法予以应对。加筋土的抗压强度及应力应变特性与麦秸秆的加筋长度、加筋率和土的含水率有关。加筋土的抗压强度试验结果证实：0.25%加筋率的加筋土抗压强度最大，0.20%和0.30%的次之；50 mm加筋长度加筋土的抗压强度最大，70 mm的最小。0.25%加筋率的加筋土应力应变曲线的峰值最大；随加筋长度的增加，加筋率对应力应变的影响程度降低。随加筋长度的增加，加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加筋长度的最为明显。低于最优含水率，应力应变曲线存在峰值；高于最优含水率，加筋土逐渐转向塑性变形。总结麦秸秆加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。

Effect of Reinforcement Condition and Water Content on Compressive Strength and Stress-Strain of Compaction Soil with Wheat Straw

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 and water content of soil influence the compressive strength of heavy compaction specimen and its stress-strain.It has been proved that(1)compressive strength of reinforced soil with 0.25% ratio is the best,those with 0.2% and 0.3% are better,peak of stress-strain curve of reinforced soil with 0.25% is remarkable;(2)ef...