麦秸秆加筋盐渍土重型击实效果的影响因素分析

›› 2011, Vol. 32 ›› Issue (2): 448-452.

麦秸秆加筋盐渍土重型击实效果的影响因素分析

王沛¹，柴寿喜¹，王晓燕²，魏丽¹，李敏³

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

收稿日期:2009-09-07 出版日期:2011-02-10 发布日期:2011-02-16
作者简介:王沛，男，1973年生，学士，高级实验师，主要从事滨海盐渍土改性固化及加筋土研究。
基金资助:
国家自然科学基金（No. 40772166）；天津市高等学校科技发展基金（No. 20090901）。

Analysis of effect factors of heavy compaction test for wheat straw-reinforced saline soil

WANG Pei¹, CHAI Shou-xi¹, WANG Xiao-yan², WEI Li1, LI Min³

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

Received:2009-09-07 Online:2011-02-10 Published:2011-02-16

摘要/Abstract

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。

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

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.

Key words: heavy compaction test, wheat straw, inshore saline soil, optimum water content, maximum dry density

中图分类号:

TU 448

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]. , 2011, 32(2): 448-452.

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]. , 2011, 32(2): 448-452.

参考文献

相关文章 15

[1]	邓友生，吴鹏，赵明华，段邦政，. 基于最优含水率的聚丙烯纤维增强膨胀土强度研究[J]. , 2017, 38(2): 349-353.
[2]	彭尔兴，孙文博，章定文，刘松玉，朱小丹，. 非饱和含砂细粒土的气体渗透特性研究[J]. , 2016, 37(5): 1301-1306.
[3]	赵娜，左永振，王占彬，余盛关. 基于分形理论的粗粒料级配缩尺方法研究[J]. , 2016, 37(12): 3513-3519.
[4]	左永振，张伟，潘家军，赵娜. 粗粒料级配缩尺方法对其最大干密度的影响研究[J]. , 2015, 36(S1): 417-422.
[5]	柴寿喜，王沛，王晓燕. 麦秸秆布筋区域与截面形状下的加筋土抗剪强度[J]. , 2013, 34(1): 123-127.
[6]	张鑫，孙树林，魏永耀，盘霞 . 掺绿砂改良膨胀土室内试验研究[J]. , 2012, 33(S2): 209-212.
[7]	朱崇辉，王增红，希罗科夫 B. H.. 单点击实法击实试验研究[J]. , 2012, 33(1): 60-64.
[8]	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]. , 2011, 32(4): 1051-1056.
[9]	朱俊高，翁厚洋，吴晓铭，刘汉龙. 粗粒料级配缩尺后压实密度试验研究[J]. , 2010, 31(8): 2394-2398.
[10]	冯瑞玲，陶建利，赵占厂，沈宇鹏. 含粗粒的细粒土的压实特性研究[J]. , 2010, 31(2): 382-386.
[11]	王沛，王晓燕，柴寿喜. 滨海盐渍土的固化方法及固化土的偏应力-应变[J]. , 2010, 31(12): 3939-3944.
[12]	杨继位，柴寿喜，王晓燕，魏丽，李敏. 以抗压强度确定麦秸秆加筋盐渍土的加筋条件[J]. , 2010, 31(10): 3260-3264.
[13]	魏丽，柴寿喜，蔡宏洲，王晓燕，李敏，石茜. 麦秸秆加筋材料抗拉性能的实验研究[J]. , 2010, 31(1): 128-132.
[14]	柴寿喜，王晓燕，王沛，魏丽，仲晓梅，李芳. 含盐量对石灰固化滨海盐渍土微结构参数的影响[J]. , 2009, 30(2): 305-310.
[15]	柴寿喜，杨宝珠，王晓燕，王沛，仲晓梅，魏丽 . 含盐量对石灰固化滨海盐渍土力学强度影响试验研究[J]. , 2008, 29(7): 1769-1772.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed