论文部分内容阅读
一前言暗管排水用于盐碱地改良时,如当地没有砂砾石可做滤料,就需要选用其他纤维材料(包括生物和化纤材料)来代替,由于纤维材料成份不同,对盐碱的适应差别很大,必须通过试验来确定纤维材料的耐盐性。在选择试验用料时,参考了国内外使用滤料的经验,选择了麻(国外认为较好的滤料)、棕皮(国内常用的滤料)、玻璃纤维布(国外使用广泛、但不宜用于含铁高的土壤)、弹力丙纶丝(近几年国外新投入使用的化纤滤料)、聚丙烯撕裂薄膜(市场较便宜的化纤材料)等五种纤维材料进行耐盐性研宄,目的是筛选出适于盐碱地排水管使用的滤料,供暗管排水设计施工时采用。
Foreword When the dark pipe drainage is used to improve the saline-alkali soil, if there is no gravel in the local area, filter materials can be used. It is necessary to use other fiber materials (including biological and chemical fiber materials) instead. Due to the different fiber materials, the adaptation to saline-alkali is very different. Large, must be tested to determine the salt resistance of fiber materials. During the selection of test materials, reference was made to the experience of using filter media at home and abroad, and hemp (better filter material for foreign countries), brown skin (commonly used domestic filter materials), and glass fiber cloth (widely used abroad but not suitable) were selected. It is used in salt-tolerant research on five kinds of fiber materials such as high iron-containing soil, elastic polypropylene fiber (new chemical fiber filter materials newly used in recent years), and polypropylene tear film (a cheaper chemical fiber material). The purpose is to screen out suitable filter materials for use in saline drainage pipes for the design and construction of underground pipe drainage.