改良花岗岩残积土的渗透特性研究
摘要:针对福建尤溪花岗岩残积土遇水易软化崩解的特性，采用外掺法对其掺入改良剂进行改良，以降低其渗透系数。同时掺入石灰和粉煤灰，灰土质量比（即石灰质量∶粉煤灰质量∶花岗岩残积土质量）分别设置为1∶1∶8，1∶2∶7和1∶3∶6。对福建尤溪花岗岩残积土进行基本土工试验、击实试验和颗粒分析试验，对改良前后的尤溪花岗岩残积土进行变水头渗透试验，试验结果表明：（1）经掺入石灰和粉煤灰改良后的花岗岩残积土，其饱和渗透系数较改良前均有所降低，其抗渗性得到了提高。（2）当灰土质量比为1∶2∶7时，其饱和渗透系数降低幅度最大，改良效果最好。（3）无论重塑土还是改良土，其饱和渗透系数均随孔隙比的增大而增大，随干密度的增大而降低。
Abstract:In response to the mechanical characteristics of the residual soil of granite in Youxi, Fujian, which is prone to softening and disintegration when encountering water, the external additives mixing method was used to improve its properties by adding additives to reduce its permeability coefficient. Adding ratios of lime, fly ash, and residual soil were set to 1∶1∶8, 1∶2∶7, and 1∶3∶6, respectively. Basic physical property index tests, compaction tests, and particle grading analysis tests were conducted on the granite residual soil from Youxi in Fujian. Variable water head permeability tests were conducted on the granite residual soil and improved granite residual soils separately. The test results showed that: (1) The saturated permeability coefficients of the improved granite residual soils by adding lime and fly ash into soil were decreased remarkably compared with that of the remolded residual soil, and its impermeability has been improved. (2) When the ratio of lime, ash, and soil is 1∶2∶7, the decrease in saturated permeability coefficient is the greatest, and the improvement effect in permeability is the best. (3) Whether remolded soil or improved soil, its saturated permeability coefficient increases with the increasing of its pore ratio, and decreases with the increasing of its dry density.
中文标题：
改良花岗岩残积土的渗透特性研究
Permeability Characteristics of Improved Granite Residual Soils
作者：
杨雪强1,,钟华斌2,陶家琦1,周宝贵2,,,蔡池锋2
Yang Xueqiang1,,Zhong Huabin2,Tao Jiaqi1,Zhou Baogui2,,,Cai Chifeng2
作者简介:杨雪强，男，1966年生，汉族，河南唐河人，博士，教授，主要从事土体本构关系及边坡稳定等研究。E-mail：xqyfls@126.com通讯作者:周宝贵，男，1973年生，汉族，广东广州人，学士，高级工程师，主要从事土木工程施工与管理研究。E-mail：121825593@qq.com
通讯地址：
1.广东工业大学 土木与交通工程学院，广东广州 510006 2.中建安装集团有限公司，江苏南京 210000
1.SchoolofCivilandTransportationEngineering,GuangdongUniversityofTechnology,Guangzhou510006,Guangdong,China 2.ChinaConstructionIndustrial&EnergyEngineeringGroupCo.,Ltd.,Nanjing210000,Jiangsu,China
中图分类号:TU411
doi:10.3969/j.issn.1007-2993.2024.05.015
出版物：岩土工程技术
收稿日期:2023-05-22
修回日期:2024-03-18
录用日期:2024-04-24
网络出版日期:2024-10-09
刊出日期:2024-10-09
关键词:花岗岩残积土,土体改良,击实试验,变水头渗透试验,微观试验
Key words:granite residual soil,soil improvement,compaction test,variable water head permeability test,microscopic experiment
文档包含图片数量：图片(8)张
文档包含表格数量：表格(4)个
参考文献：
[1]洪昌伟. 广西花岗岩残积土强度与渗透性及工程应用研究[D]. 武汉: 湖北工业大学, 2020.
[2]刘金明. 玄武岩纤维与纳米氧化铁对花岗岩残积土性质影响的研究[D]. 桂林: 桂林理工大学, 2022.
[3]臧东亮. 花岗岩残积土力学性能改良试验研究[J]. 粉煤灰综合利用,2021,35(1):31-35,51.
[4]AI-SHAYEA, NASER A. The combined effect of clay and moisture content on the behavior of remolded unsaturated soils[J]. Engineering Geology,2001,62(4):319-342. doi: 10.1016/S0013-7952(01)00032-1
[5]DENG Y F, WU Z L, CUI Y J, et al. Sand fraction effect on hydro- mechanical behavior of sand-clay mixture[J]. Applied Clay Science,2017,135:355-361. doi: 10.1016/j.clay.2016.10.017
[6]AN R, KONG L, LI C. Effects of drying-wetting cycles on the microstructure and mechanical properties of granite residual soils[J]. Soil Mechanics and Foundation Engineering,2022,58(6):474-481. doi: 10.1007/s11204-022-09769-9
[7]王志兵, 邹永胜, 李 斌, 等. 桂东南花岗岩风化土与残余节理的微观结构及演化[J]. 地球科学与环境学报,2020,42(3):405-415.
[8]马士力, 白 云, 李大勇. 砂土中黏粒含量对渗透性的影响[J]. 广西大学学报(自然科学版),2018,43(1):226-231.
[9]胡其志, 洪昌伟, 李 鸣. 不同黏粒含量对花岗岩残积土渗透性影响[J]. 科学技术与工程,2019,19(32):267-271. doi: 10.3969/j.issn.1671-1815.2019.32.040
[10]GB/T 50123—2019 土工试验方法标准[S]. 北京: 中国建筑工业出版社, 2019.
[11]王绍全, 高 斯, 何钰龙, 等. 基于微观分析的石灰改良粉质粘土击实特性[J]. 中外公路,2015,35(6):246-248.
[12]刘 胜. 石灰—粉煤灰改良花岗岩残积土试验研究[D]. 福州: 福州大学, 2018.
[13]林 彤. 粉煤灰加固软土地基的室内配方试验研究[J]. 水文地质工程地质,2003(S1):76-78.
[14]张雪娇, 刘 攀, 杨雪强, 等. 石灰改良黄土渗透性与孔隙结构的关系研究[J]. 广东工业大学学报,2021,38(3):97-103 doi: 10.12052/gdutxb.200070
基金项目：
基金项目:国家自然科学基金项目（51978177）
- 文件大小:
- 1.55 MB
- 下载次数:
- 60
-
高速下载
|
|
