EN-1对砒砂岩固化土坡面径流水动力学特征的影响  

Effects of EN-1 Soil Stabilizer on Slope Runoff Hydraulic Characteristics of Pisha Sandstone Stabilized Soil

作　　者：苏涛[1] 张兴昌[2] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《农业机械学报》2011年第11期68-75,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB106803)

摘　　要：为探讨砒砂岩地区工程边坡径流的侵蚀规律,通过室内模拟冲刷试验,对添加EN-1固化剂后不同固化剂掺量、养护龄期和压实度的边坡径流水动力学特征进行了研究。结果表明:在试验设计的固化剂掺量、养护龄期和压实度处理条件下,砒砂岩固化土坡面径流流速随固化剂掺量、养护龄期和压实度的增大而增大,且径流流速随冲刷的进行呈现出波动减小的趋势。径流雷诺数Re随固化剂掺量、养护龄期和压实度的增大而减小,且Re有随冲刷的进行而逐渐增大的波动变化趋势,而弗劳德数Fr的变化趋势正好与Re相反。除压实度在较小处理冲刷后期时径流流态为紊流和缓流外,其他处理都是层流和急流。径流Darcy-Weisbach阻力系数f随固化剂掺量、养护龄期和压实度增大而减小,且f与输沙率有一定的正相关关系。In order to study erosion rule of engineering slope runoff and provide scientific and theoretical basis for control of water and soil loss of slope in Pisha sandstone region,the hydrodynamic characteristics of slope runoff under the different EN-1 soil stabilizer contents,curing ages and compaction degrees treated with soil stabilizer were studied by using indoor runoff scouring experiment.The results showed that flow velocity of slope runoff of Pisha sandstone stabilized soil increased with the increase of soil stabilizer contents,curing ages and compaction degrees under the soil stabilizer contents,curing ages and compaction degrees in this experiment and it had a fluctuant and decreased tendency with scouring time.The Reynolds number（Re） of slope runoff decreased with the increase of soil stabilizer contents,curing ages and compaction degrees and it had a fluctuant and increased tendency with scouring time.The Froude number（Fr） of slope flow runoff had the opposite trends.The flow regimes were turbulent flow and subcritical flow when scouring proceeded to the later period at smaller compaction degrees.The flow regimes were all laminar flow and supercritical flow at the other treatments.The Darcy-Weisbach drag coefficient（f） of slope runoff decreased with the increase of soil stabilizer contents,curing ages and compaction degrees,and had a positive correlation with sediment transport rate.

关 键 词：砒砂岩 EN-1固化剂 坡面侵蚀 水动力学 冲刷试验 

分 类 号：S157.1[农业科学—土壤学] S273.29[农业科学—农业基础科学]