| 麦秸秆加筋盐渍土重型击实效果的影响因素分析 |
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| 引用本文： | 王沛,柴寿喜,王晓燕,魏丽,李敏.麦秸秆加筋盐渍土重型击实效果的影响因素分析[J].岩土力学,2011,32(2):448-452. |
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| 作者姓名： | 王沛 柴寿喜 王晓燕 魏丽 李敏 |
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| 作者单位： | 1.天津城市建设学院 天津市软土特性与工程环境重点试验室，天津 300384；2. 中水北方勘测设计研究有限责任公司 勘察院，天津 300222；3. 兰州大学 西部灾害与环境力学教育部重点试验室，兰州 730000 |
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| 基金项目： | 国家自然科学基金，天津市高等学校科技发展基金 |
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| 摘 要： | 为解决因滨海盐渍土的盐胀和溶陷而引起土的强度降低问题，可采用麦秸秆加筋的方法处理盐渍土，以提高土的强度和抗变形能力。将盐渍土与一定长度和数量的防腐麦秸秆均匀拌和在一起，按照一定的碾压功将其碾压密实，此时土的含水率、麦秸秆的质量加筋率和加筋长度是影响加筋土重型击实效果的3个因素。试验结果揭示，（1）加筋土的最大干密度均小于盐渍土的，最优含水率变化不大。（2）与盐渍土一样，随着含水率的增加，加筋土的干密度先升后降。（3）随质量加筋率和加筋长度的增加，加筋土的最优含水率变化不明显，最大干密度持续下降，但降幅较小。（4）0.2%质量加筋率加筋土的干密度最大，0.3%质量加筋率的最小。（5）30 mm加筋长度加筋土的干密度最大，70 mm加筋长度的最小。建议按0.2%质量加筋率和30 mm加筋长度的防腐麦秸秆制备三轴压缩试样，以研究麦秸秆加筋滨海盐渍土的抗剪强度和应力-应变特性。
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| 关 键 词： | 重型击实试验 麦秸秆 滨海盐渍土 最优含水率 最大干密度 |
| 收稿时间： | 2009-09-07 |
Analysis of effect factors of heavy compaction test for wheat straw-reinforced saline soil |
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| WANG Pei,CHAI Shou-xi,WANG Xiao-yan,WEI Li,LI Min.Analysis of effect factors of heavy compaction test for wheat straw-reinforced saline soil[J].Rock and Soil Mechanics,2011,32(2):448-452. |
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| Authors: | WANG Pei CHAI Shou-xi WANG Xiao-yan WEI Li LI Min |
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| Institution: | 1. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Institute of Urban Construction, Tianjin 300384, China; 2. Institute of Investigation, China Water Resources, Beifang Investigation, Design and Research Co. Ltd., Tianjin 300222, China; 3. Key Laboratory of Mechanics on Disaster and Environment in Western China of Education Ministry, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | In order to increase the strength and anti-deformation of inshore saline soil, reinforced saline soil with wheat straw can be used for overcoming some problems from salt expansion and dissolution. Saline soil and anti-corrosive wheat straw is mixed in a certain of length and mass ratio, and is compacted in the condition of some compaction way, water content of soil and mass ratio and length of wheat straw is selected as effect factors for compaction effectiveness in heavy compaction test. The results indicate that: (1) Maximum dry density of reinforced soil is smaller than that of saline soil, and these optimum water contents are approximate. (2) Dry densities of saline soil and reinforced soils increase first, then decrease. (3) With the increase of mass ratio and length of wheat straw, optimum water contents of reinforced soils are hardly changed, but these dry densities decrease continuously at a low speed. (4) Dry density with mass ratio of 0.2% is the most one, and that with 0.3% is the least one. (5) Dry density with length of 30 mm is the most one, and that with 70 mm is the least one. It should be proposed that samples of reinforced soil is made in the condition of mass ratio of 0.2% and length of 30 mm for studying the strength and stress-strain by means of triaxial shear test. |
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| Keywords: | heavy compaction test wheat straw inshore saline soil optimum water content maximum dry density |
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