土石结合部接触冲刷渗透破坏特性试验研究  

Experimental Study on Contact Scouring of the Earth Rock Combination

作　　者：李娜[1,2] 汪自力[1,2] 赵寿刚[1,2] 高玉琴[1,2] 常芳芳[1,2] 康延铭[3] LI Na;WANG Zili;ZHAO Shougang;GAO Yuqin;CHANG Fangfang;KANG Yanming(Yellow River Institute of Hydraulic Research,YRCC,Zhengzhou 450003,China;Research Center on Levee Safety&Disaster Prevention,MWR,Zhengzhou 450003,China;Zhengzhou Metro Group Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]黄河水利委员会黄河水利科学研究院,河南郑州450003 [2]水利部堤防安全与病害防治工程技术研究中心,河南郑州450003 [3]郑州地铁集团有限公司,河南郑州450000

出　　处：《人民黄河》2019年第12期122-126,共5页Yellow River

基　　金：水利部公益性行业科研专项(201501036);国家自然科学基金资助项目(51609099);中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2016-12,HKY-JBYW-2017-01)

摘　　要：为研究穿堤建筑物与堤防土石结合部接触冲刷渗透破坏情况,利用自行设计的接触冲刷试验装置,实现了土石结合部接触冲刷渗透破坏的室内模拟。通过对接触面存在裂隙的土样开展相关试验,揭示了接触冲刷渗透破坏的发生、发展变化过程,分析了土体性质、裂隙宽度及水力比降等因素对接触冲刷破坏时间及冲刷量的影响。试验结果表明:黏粒含量较大的土体抗冲刷能力较强;土体性质的影响随着裂隙宽度的增加及水力比降的增大而逐渐减弱;冲刷量随裂隙宽度的增加而减小,但当裂隙宽度大于2.7 mm时,各黏粒含量土体试样的冲刷破坏时间及冲刷量较为接近,开度不再具有明显作用。The new face of test instrument was designed and the seepage failure of contact scouring by indoor simulation experiments was final ly achieved to study contact scouring of earth rock combination. Then, the development of contact scouring demolition with crack samples was discussed. According to the experimental data, the influence of soil properties, crack width and hydraulic slope to the failure time and the a mount of erosion of contact scouring was analyzed. The results show that the greater the clay content is, the stronger the soil erosion resistance is. The influence of the soil properties gradually decreases with the increase of crack width and hydraulic slope. The erosion of soil samples decreases with the crack width increasing. But the failure time and the erosion of soil samples with different clay contents are considerably close, when the crack width is greater than 2.7 mm. At this point, the opening is no longer significant in effect.

关 键 词：土石结合部 接触冲刷 渗透破坏 

分 类 号：TU41[建筑科学—岩土工程] TV223.4[建筑科学—土工工程]