摘要
以某建筑工地常见的杂填土为原土,加入水泥形成水泥加固土,利用微机控制电液伺服万能试验机及改装后的高速搅拌机进行室内试验。试验过程中控制水灰比不变,研究不同水泥掺量和不同龄期等条件下水泥土无侧限抗压强度的变化规律,试验得出各条件下水泥土试块抗压强度值,并通过数据分析得出可以预测水泥土强度的函数表达式。结果表明,随着水泥掺量的增加,水泥土的抗压强度逐渐增大;当掺量为25%时,水泥土的强度增长幅度最大;水泥土的抗压强度的变化与龄期增长的关系密切,呈现三次函数变化,当龄期为60d时,水泥土强度高于龄期为90d的强度。该研究成果可为以杂填土为土质的地基基础或基坑支护设计等基础工程提供理论参考依据。
With miscellaneous fill soil used for the soil from a common construction site,cement is added to form a cement reinforced soil,and microcomputer is used to control the electro-hydraulic servo universal testing machine as well as the modified high-speed mixer for indoor test.The water-cement ratio is unchanged during the test,the variation law of unconfined compressive strength of cement soil under different cement contents and different ages is studied,the compressive strength values of cement mortar under various conditions are obtained,and the function expression of cement soil strength can be obtained by data analysis.The results show that the compressive strength of cement soil increases with the increase of cement content;when the content is 25%,the strength of cement soil increases to the maximum;the relationship between the compressive strength of cement soil and the growth of the age is closely related,with the cubic function,when the age is 60d,the strength of cement soil is higher than that of 90d.The research results can provide theoretical reference for basic engineering such as foundation engineering or foundation pit support design with miscellaneous fill soil.
出处
《长江大学学报（自然科学版）》
CAS
2017年第5期64-66,共3页
Journal of Yangtze University(Natural Science Edition)
基金
湖北省自然科学基金项目(2015CFB667)
湖北省教育厅科学技术研究项目(Q20141307)
大学生创新训练计划项目(2015004)
关键词
水泥土
无侧限抗压强度
水泥掺量
龄期
杂填土
cement soil
unconfined compressive strength
cement content
age
miscellaneous filling soil
