孙   浩^1 ,2 ,  王小动^{1 ,2}  ,  邵景松³  ,   肖    威^{1 ,2}  ,  李晓辉^1 ,2  ,  韩瑞朝^1 ,2  ,  郭光洁^1 ,2

( 1 .  中铁十五局集团有限公司 ，上海 200070 ;  2.  中铁十五局集团第五工程有限公司 ，天津 300133 ;

3 .  河南省许魏绕城高速公路有限公司 ，河南 郑州 450000)

摘   要： 以建筑渣土为研究对象，通过比重 、击实、承载比  (CBR)   及剪切试验方法，对其原状土的基本工程性能进行了室内研究。基于试验结果，进一步采用石灰、水泥和砂对建筑渣土进行改性处理， 以提升其作为路基填料的适用性。结果表明： 三种改良剂均能提升建筑渣土的路用性能。其中水泥掺量为 4% 时，改性土 CBR 值可达 130. 66% ,  较原状土相比提升 116. 45% ;  石灰掺量为 4% 时 ，其 CBR 值为 128 . 59% ,   较原状土相比提升 114. 38% ;  砂掺量为 5% 时改良土较原状土 CBR 值也有所增加，但效果不及水泥和石灰；原状土经水泥、石灰、砂改良后的抗剪强度也有一定的提升。其中水泥掺量为 5% 、石灰掺量为 4% 和砂掺量为 5%  时抗剪 强度较好 ，与原状土相比，黏聚力分别提升 154. 0% 、164. 5% 和 74. 6% ,   内摩擦角分别提升343 . 7% 、310. 2% 及 78. 3% 。

关键词：路基填料 ；建筑渣土 ；改良 ；承载比

中图分类号：U414           

文献标志码：A            

文章编号： 1005- 8249   (2024)  06- 0131- 07 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.024

SUN Hao^1 , 2 ,  WANG Xiaodong^{1 , 2}  ,  SHAO Jingsong³  ,  XIAO Wei ^{1 , 2}  ,  LI Xiaohui ^{1 , 2}  ,

HAN Ruichao1 , 2  ,  GUO Guangjie1 , 2

( 1 . China Railway 15th Bureau Group Co. ，Ltd. ，Shanghai 200070 ,  China;

2. China Railway 15th Bureau Group 5th Engineering Co. ，Ltd. ，Tianjin 300133 ,  China;

3 . Henan Provice Xuwei Ring Expressway Co. ，Ltd. ，Zhengzhou 450000 ,  China)

Abstract: Using construction waste as the research subject, basic engineering properties of the native soil were investigated through laboratory tests including specific gravity, compaction, California Bearing Ratio (CBR), and shear tests. Based on the test results, the construction waste was further modified with lime, cement, and sand to enhance its suitability as a subgrade filler. The study found that all three modifiers improved the road performance of the construction waste. Specifically, when the cement content was 4%, the modified soil's CBR value reached 130.66%, representing an increase of 116.45% compared to the native soil. With a lime content of 4%, the CBR value was 128.59%, an increase of 114.38% compared to the native soil; while a sand content of 5% also increased the CBR value, though not as effectively as cement and lime. Additionally, the shear strength of the native soil was significantly enhanced after modification with cement, lime, and sand. With a cement content of 5%, a lime content of 4%, and a sand content of 5%, the shear strength improvements were notable: the cohesion increased by 154.0%, 164.5%, and 74.6% respectively; and increases in the internal friction angle of 343.7%,310.2%, and 78.3% respectively,compared to the untreated soil.

Keywords :  subgrade fill material  ;   construction waste  ;   improvement  ;  load bearing ratio

作者简介：孙   浩  (1982—) ,  男 ，本科 ，高级工程师 ，研究方向：道路桥梁。

通信作者： 王小动  (1985—) ,  男 ，本科 ，高级工程师 ，研究方向： 隧道工程。

收稿日期：2024- 07- 27