建筑垃圾改良黄河冲积粉土的力学特性试验研究  

Experimental Study on Mechanical Properties of the Yellow River Alluvial Silt Modified by Construction Waste

作　　者：赵鹏 侯振国 罗浩 郝良英 李振宇[2] 张景伟[2] 杜子博 ZHAO Peng;HOU Zhenguo;LUO Hao;HAO Liangying;LI Zhenyu;ZHANG Jingwei;DU Zibo(China Construction Seventh Engineering Division Co.Ltd.,Zhengzhou 450004,China;School of Water Conservancy and Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]中国建筑第七工程局有限公司,郑州450004 [2]郑州大学水利与土木工程学院,郑州450001

出　　处：《河南科学》2022年第10期1611-1618,共8页Henan Science

基　　金：国家自然科学基金(51908513);河南省重点研发与推广专项(212102310279)。

摘　　要：为了解决黄河冲积粉土工程性质较差这一问题,首先用建筑垃圾对黄河冲积粉土进行改良,然后通过试验研究了不同掺量的建筑垃圾对黄河冲积粉土力学特性的影响.试验结果表明:掺比20%以上的建筑垃圾能够显著提高黄河冲积粉土的最佳含水率;经建筑垃圾改良的黄河冲积粉土的压缩系数α随着建筑垃圾掺量的增加而减小,渗透系数则随着建筑垃圾掺量的增加而增加,这表明使用经建筑垃圾改良的黄河冲积粉土作为路基填料,可减小路基变形,提高路基的水稳定性;掺入粒径在1~2 mm之间的建筑垃圾虽然会降低黄河冲积粉土的强度,但能显著提高黄河冲积粉土的内摩擦角.本研究可为黄河冲积粉土改良工程提供参考.To solve the problem of poor engineering properties of Yellow River alluvial silt,construction waste was used to improve it firstly,and then the influence of different amounts of construction wastes on the mechanical properties of the Yellow River alluvial silt was studied through experiments.The test results show that the optimum moisture content of Yellow River alluvial silt can be significantly improved when the proportions of construction waste is more than 20%.The compression coefficientαof the Yellow River alluvial silt improved by construction waste decreases with the increase of construction waste content,while the permeability coefficient increases with the increase of construction waste content.These demonstrate that it can reduce the deformation of the roadbed and improve the water stability of roadbed when using the Yellow River alluvial silt improved by construction waste as roadbed filler.Although the addition of construction waste with particle site between 1 mm and 2 mm will reduce the strength of the Yellow-River alluvial silt,it can significantly increase the internal friction angle of the Yellow River alluvial silt.This study can provide reference for the improvement project of the Yellow River alluvial silt.

关 键 词：建筑垃圾 黄河冲积粉土 力学特性 抗剪强度 渗透性 

分 类 号：P539.7[天文地球—古生物学与地层学] TU416[天文地球—地质学]