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孫   浩^1 ,2 ,  王小動^{1 ,2}  ,  邵景松³  ,   肖    威^{1 ,2}  ,  李曉輝^1 ,2  ,  韓瑞朝^1 ,2  ,  郭光潔^1 ,2

( 1 .  中鐵十五局集團有限公司 ，上海 200070 ;  2.  中鐵十五局集團第五工程有限公司 ，天津 300133 ;

3 .  河南省許魏繞城高速公路有限公司 ，河南 鄭州 450000)

摘   要： 以建筑渣土為研究對象，通過比重 、擊實、承載比  (CBR)   及剪切試驗方法，對其原狀土的基本工程性能進行了室內研究。基于試驗結果，進一步采用石灰、水泥和砂對建筑渣土進行改性處理， 以提升其作為路基填料的適用性。結果表明： 三種改良劑均能提升建筑渣土的路用性能。其中水泥摻量為 4% 時，改性土 CBR 值可達 130. 66% ,  較原狀土相比提升 116. 45% ;  石灰摻量為 4% 時 ，其 CBR 值為 128 . 59% ,   較原狀土相比提升 114. 38% ;  砂摻量為 5% 時改良土較原狀土 CBR 值也有所增加，但效果不及水泥和石灰；原狀土經水泥、石灰、砂改良后的抗剪強度也有一定的提升。其中水泥摻量為 5% 、石灰摻量為 4% 和砂摻量為 5%  時抗剪 強度較好 ，與原狀土相比，黏聚力分別提升 154. 0% 、164. 5% 和 74. 6% ,   內摩擦角分別提升343 . 7% 、310. 2% 及 78. 3% 。

關鍵詞：路基填料 ；建筑渣土 ；改良 ；承載比

中圖分類號：U414           

文獻標志碼：A            

文章編號： 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

作者簡介：孫   浩  (1982—) ,  男 ，本科 ，高級工程師 ，研究方向：道路橋梁。

通信作者： 王小動  (1985—) ,  男 ，本科 ，高級工程師 ，研究方向： 隧道工程。

收稿日期：2024- 07- 27