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吴    强1 ,2

 

( 1 .  河南工业大学 ，郑州 450001 ;  2.  河南工大设计研究院有限公司 ，郑州 450001)

摘   要 ：为优化软土地基性能 ，探究不同高钙粉煤灰掺量对软土地基性能的影响。 以高钙粉煤灰 、水泥、软土等为原材料 ，依据设定配比制备不同高钙粉煤灰掺量的试件。通过扫描显微镜观察试件表观结构 ，利用压力试验机等开展强度 、变形及渗透性试验 ，探究高钙粉煤灰掺量对试件性能的影响。结果表明：在既定地质条件试验下 ，当高钙粉煤灰掺量为 40 % 时 ，土体结构最为紧密 ，此时抗压强度达峰值 42. 33 MPa ,  抗剪强度最优为 105. 45 MPa ,  压缩模量最大 ，压缩变形量与压缩系数最低，40 cm 水头差下渗透系数最低至 0. 25 ×10 - 6  cm/s 。因此 ，在实际软土地基加固工程中 ，可将高钙粉煤灰掺量设定为 40% 作为参考 ，以达到较好的加固效果。

关键词：软土地基 ；高钙粉煤灰 ；地基加固 ；抗压强度 ；抗剪强度 ；渗透性

中图分类号：TU472. 36           

文献标志码：A          

 文章编号： 1005- 8249   (2025)  04- 0080- 05

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .04.015

 

WU Qiang 1 , 2

( 1 . Henan University of Technology ,   Zhengzhou 450001 ,   China;

2. Henan Institute of Industrial Design ,   Co . ,   Ltd. ,  Zhengzhou 450001 ,   China)

Abstract : To optimize the performance of soft soil foundation ,  explore the influence of different high calcium fly ash content on the performance of soft soil foundation.  Using high calcium fly ash ,  cement ,  soft soil and other raw materials ,  prepare samples with different amounts of high calcium fly ash according to the set ratio.  By observing the apparent structure of the sample

through a scanning microscope and conducting strength ,  deformation ,  and permeability tests using a pressure testing machine ,the influence of high calcium fly  ash content on the performance of the  sample is explored.  The results show that under established geological conditions , when the content of high calcium fly ash is 40 % ,  the soil structure is most compact ,  with a peak compressive strength of 42. 33 MPa and an optimal shear strength of 105. 45 MPa.  The compressive modulus is the highest , the compression deformation and compression coefficient are the lowest ,  and the permeability coefficient is the lowest at a water head difference of 40 cm ,  reaching 0. 25 ×10 - 6  cm/s .  Therefore ,  in actual soft soil foundation reinforcement projects , the high calcium fly ash content can be set at 40% as a reference to achieve better reinforcement effects .

Key words :  soft soil foundation;  high  calcium fly  ash;  foundation  reinforcement;  compressive strength;  shear  strength; permeability

作者简介:吴强(1970一)男，硕士，高级工程师，研究

方向:结构工程

收稿日期:2025-03-26