CHENG Hong,YAN Chuan-sheng,LI Jian-qing,et al.An Experimental Study on Mechanic Performance and Mechanism of Soil-reinforcement by Herb Root System[J].Research of Soil and Water Conservation,2006,13(01):62-65.
草本植物根系网的固土机制模式与力学试验研究
- Title:
- An Experimental Study on Mechanic Performance and Mechanism of Soil-reinforcement by Herb Root System
- Keywords:
- soft bioengineering approach; root network; mechanics of soil-reinforcement; tensile strength; root and soil composite; herb
- 分类号:
- S157.433
- 摘要:
- 针对生物软措施的力学固土护坡作用进行了力学机制方面的探讨，提出植物根系网固土力学机制模式的四个层次，以及对不同草本植物根系的固土性能进行了力学试验比较。结果表明不同植物根系具有不同的抗拉强度。香根草根系平均抗拉强度最大达85 mPa，其次为假俭草，平均抗拉强度27.3 mPa，白三叶根系平均抗拉强度为24.6 mPa，莎草根系平均抗拉强度为24.5 mPa，宜安草根系平均抗拉强度为19.7 mPa，百喜草根系平均抗拉强度为19.23 mPa，马尼拉草根系平均抗拉强度为17.5 mPa，狗牙根根系平均抗拉强度为13.45 mPa。不同的植物根系具有不同的抗拉强度、不同的固土性能与其遗传结构及其组织材料不同有关。充分了解和认识植物根系固土性能，科学合理运用生物软措施代替或部分代替工程措施在我国繁重的生态环境保护和恢复的基本建设工程项目中具有重要的应用价值和意义。
- Abstract:
- A study carried out on the mechanic function and the mechanism of soil reinforcement by herb root system was discussed,in which there are four primary functions analyzed and four sorts of soil-stabilities in using herb roots are raised and an experimental comparison with mechanics in the function of soil-reinforcement of various herb roots was conducted.The results were revealed that various roots have different tensile strength.Thus,the maximum of tensile strength of Vetiver grass(Vetiveria Zizanioides) reaches 85 mpa;secondly,Common Cetipede grass(Eremochioa ophiuroides hack) ,(27.3) ;White Clover(trifolium repens) ,24.64;Late Juncellus(Juncelles serotinus) ,24.50;Dallis grass(Paspalum dilatatum poir) ,19.74;Bahio grass(paspalum notatum flugge) ,19.23;Manila grass(Zoysia matrella merr) ,17.55;Bermuda grass(Cynodon dnactylo) ,(13.45) .Different tensile strength of various roots and performance of soil reinforcement are discussed and revealed that the difference is concerned with the gene variety and tissue structure.Up to the present it is quite important and necessary for us to make use of soft engineering approach instead of hard engineering approach in all or partly,so as to protect natural resource and restore environment during peak time of primary construction in China.
参考文献/References:
[1] 康绍忠.土壤-植被-大气连续体水分传输理论与应用[M].北京:水电出版社,1994.
[2] 黄昌勇.土壤学[M].北京:中国农业出版社,2000.
[3] Jackson R B,Canadell J,Mooney H A.A global analysis of root distribution for terrestrial biomass[J].Oecologia,1996,180:389-411.
[4] Gale M R,Grigal D E.Vertical root distribution of northern tree species in relation to successional status[J].Can J For For,1987,(17):829-834.
[5] Lyr H,Hoffmann G.Growth rates and growth periodicity of tree roots[J].Int.Rev.For.Res.,1967,2:181-236.
[6] Coile T S.Distribution of forest tree roots in North Carolina Piedmont soils[J].J.For.,1936,35:247-257.
[7] 李鹏,等.渭北黄土高原不同立地上刺槐根系分布特征研究[J].水土保持通报,2002,22(5):15-19.
[8] 刘建军.林木根系生态研究综述[J].西北林学院学报,1998,13(3):74-78.
[9] 单建平,陶大立.国外对树木细根的研究动态[J].生态学杂志,1992,11(4):46-49.
[10] 宋长贵,张献义.深翻对根系的影响[J].湖北林业科技,1992,(4):1-3.
[11] Diti Hengchaovanich.15 years of bioengineering in the wet tropics from A(Acacia auriculiformis) to V(Vetiveria Zizanioides)[A].Proceedings of the first Asia-Pacific conference on ground and water Bioengineering for erosion control and slope stabilization[C].Manila,the Philippines,1999.54-63.
[12] Kazuroki Abe,Masaru Iwamoto.Stimulation model for the distribution of tree roots-application to a slope stability model[J].J.Jap.For.Soc.,1990,72(5):375-387.
[13] 竹下敬司.林木根系の崩坏防止机能[J].林业技术,1989,(7):12-16.
[14] 李勇,等.黄土高原油松人工林根系改善土壤物理性质的有效性研究[J].林业科学,1993,29(3):193-198.
[15] 刘国彬,黄土高原草地拉冲性及其机理研究[D].陕西杨陵:中科院西北水土保持研究所,1996.
[16] 朱清科,等.贡嘎山森林生态系统根系固土力学机制研究[J].北京林业大学报,2002,24(4):64-67.
[17] 程洪,张新全.草本植物根系网固土原理的力学试验探究[J].水土保持通报,2002,22(5):20-23.
相似文献/References:
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备注/Memo
收稿日期:2005-4-26;
基金项目:江西交通重点科技项目9904资助
作者简介:程洪（1965- ），男，硕士，副教授，江西波阳人，主要研究方向为水土保持、生态恢复、农学等，发表论文35篇.