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| 以强度增长率评价麦秸秆加筋盐渍土的加筋效果 | |
| 引用本文： | 李敏,柴寿喜,王晓燕,魏丽.以强度增长率评价麦秸秆加筋盐渍土的加筋效果[J].岩土力学,2011,32(4):1051-1056. |
| 作者姓名： | 李敏 柴寿喜 王晓燕 魏丽 |
| 作者单位： | 1. 兰州人学,西部灾害与环境力学教育部重点实验室,兰州,730000 2. 天津城市建设学院,天津市软土特性与工程环境重点实验室,天津,300384 3. 中水北方勘测设计研究有限责任公司,天津,300222 |
| 基金项目： | 天律市自然科学基金，国家自然科学基金 |
| 摘 要： | 采用麦秸秆与石灰共同加筋固化滨海盐渍土,可解决由于盐胀、溶陷和吸湿软化引起的土体强度下降问题。首先,制备盐渍土、石灰土、麦秸秆加筋盐渍土和麦秸秆加筋石灰土试样(整体均匀加筋、上部均匀加筋和下部均匀加筋);进而,进行φ50 mm试样、φ152 mm重型击实试样和φ102 mm轻型击实试样的无侧限抗压强度试验,以及φ61.8 mm试样三轴压缩试验;最后,分析抗压强度增长率、主应力差比值和黏聚力增长率的变化规律,以评价麦秸秆的加筋效果。结果表明:①麦秸秆加筋增强了土的抗压强度和抗变形能力。②麦秸秆加筋提高了土的黏聚力,在试样下部加筋,加筋效果更好。③加筋石灰土的强度由麦秸秆和石灰共同承担,加筋石灰土的浸水稳定性来源于石灰的固化作用。④低围压时,加筋对土的侧向变形约束较强;高围压时,加筋和围压共同限制土的侧向变形。采用麦秸秆加筋是滨海盐渍土的一种有效处理方法。 |
| 关 键 词： | 加筋土 抗压强度 抗剪强度 强度增长 应力-应变 麦秸秆 滨海盐渍土 |
| 收稿时间： | 2010-01-15 |
Examination of reinforcement effect on basis of strength increment of reinforced saline soil with wheat straw and lime |
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| LI Min,CHAI Shou-xi,WANG Xiao-yan,WEI Li.Examination of reinforcement effect on basis of strength increment of reinforced saline soil with wheat straw and lime[J].Rock and Soil Mechanics,2011,32(4):1051-1056. | |
| Authors: | LI Min CHAI Shou-xi WANG Xiao-yan WEI Li |
| Institution: | 1. Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, Lanzhou University, Lanzhou 730000, China; 2. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Institute of Urban Construction, Tianjin 300384, China; 3. China Water Resources Beifang Investigation, Design and Research Co., Ltd., Tianjin 300222, China |
| Abstract: | Inferior strength,which is caused by salt expansion,dissolution and water absorption of inshore saline soil,will be prevented with the help of reinforcement with wheat straw and lime.First,some samples are prepared,which including saline soil,reinforced saline soil with wheat straw,lime-saline soil,and reinforced saline soil with lime and wheat straw as the way of reinforcement in whole,upper and lower position respectively.Then,unconfined compressive strength tests of 50 mm,152 mm(heavy compaction specimen... |
| Keywords: | reinforced soil compressive strength shear strength strength increment stress-strain wheat straw inshore saline soil |
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