摘要
纤维生态袋作为一种新型生态合成材料,是由聚丙烯纤维或聚酯纤维为原材料制成的特种复合材料袋子,因其具有无毒无害、抗腐蚀、利于植物生长等优点广泛应用于陕南膨胀土梯田建设中,该区膨胀土分布范围广,其遇水膨胀、失水收缩的特性产生的膨胀压力使得梯田垮塌、边坡失稳的现象屡增。针对梯田筑坎中袋体胀破等问题,提出了2种新型纤维生态袋:分隔式纤维生态袋和卸压式纤维生态袋。当降雨入渗发生时,袋体内的膨胀土遇水发生膨胀变形产生膨胀力,这2种新型袋体均能使膨胀力得到有效的释放和消除,提高了纤维生态袋筑坎坎墙的稳定性,对膨胀土地区的梯田建设有重大的现实意义和研究价值。
Fiber ecological bag, as a kind of new-type ecological synthetic material, is a special composite bag made of polypropylene fiber or polyester fiber as main raw materials. This bag is widely used in the construction of expansive-soil terraces in southern Shaanxi because of its non-toxic, harmless, anti-corrosion and plant-growth-beneficial advantages. The expansive soil is widely distributed in southern Shaanxi, and its expansion pressure caused by its characteristics of water-touching swelling and water-losing shrinkage can increase the phenomena of terrace collapse and slope instability. In view of the problems of bag body expansion and break in building terrace ridge, this paper puts forward two kinds of new-type fiber ecological bags： the separated-type fiber ecological bag and the pressure-relieving fiber ecological bag. When the rainfall infiltration occurs, the expansive soil in the bag body will produce expansion force due to its expansion after touching water. While these two kinds of new-type bag body can effectively release and eliminate the expansion force, and improve the stability of the terrace ridge wall built with fiber ecological bags, so they have great practical significance and research value on the terrace construction in the expansive-soil area.
作者
张媛
李荣建
ZHANG Yuan;LI Rong-jian(Shaanxi Railway Engineering Vocational Technical Institute,Weinan 714000,China;Institute of Geotechnical Engineering,Xi＇an University of Technology,Xi＇an 710048,China;Shaanxi Provincial Key Laboratory of Loess Mechanics and Engineering,Xi＇an 710048,China)
出处
《江西农业学报》
CAS
2018年第12期93-97,共5页
Acta Agriculturae Jiangxi
基金
国家自然科学基金项目(11072193)
陕西省教育厅科学研究计划项目(12JK0907)
陕西铁路工程职业技术学院2017年第二批科研基金项目计划(Ky2017-045)
关键词
纤维生态袋
梯田筑坎
膨胀土
膨胀压力
Fiber ecological bag
Building terrace ridge
Expansive soil
Expansion pressure
