摘要
为提高压实度检测效率、保证测量精度,运用压实质量快速检测技术,在某防洪治理工程中,对某段堤防进行碾压试验,将压实质量检测技术中运用较为广泛的环刀法同普氏贯入法、核子密度仪法和谐波法等快速检测方法进行对比分析,得到各种方法同环刀法的相关关系。结果表明:随碾压次数的增加,环刀法所测压实度结果呈上升趋势,振动碾压2~3次后,基本达到本工程填筑设计压实度的要求,随碾压次数的增加土体压实度基本稳定,压实度会出现小幅波动;普氏贯入法试验结果与环刀法相差不大,其相对误差可控制在±10%以内;普氏贯入法和谐波法的压实度检测结果可与环刀法建立良好的相关关系,其线性方程的相关系数R^(2)均大于0.95,而核子密度仪法在试验中表现一般,所建立线性方程的相关系数R^(2)仅为0.37。试验结果可为压实质量的快速检测以及智能碾压技术在水利工程中的应用提供技术支撑。
The drawbacks of traditional compaction quality testing methods include expensive operations,limited detection efficiency,and filling soil damage.These methods are no longer enough to satisfy the demands of high-quality water conservancy projects.The application of effective detection techniques to rapidly and precisely represent engineering building quality has emerged as a trend for future development.The cutting ring method was compared with the Platts penetration method,the nuclear densitometer method,and the harmonic method in Juma River flood control project in the south of Xiong'an New Area(Rongcheng section).The harmonic approach captures the equivalent acceleration signal using an acceleration sensor positioned on the rolling wheel,which is then filtered and Fourier transformed into a frequency domain signal.The test area adopts the construction technology of static rolling twice and vibration rolling six times to roll the test area.After each vibration rolling,the rolling area is sampled once,with a total of 15 sampling points.When the number of rolls increases,shift 0.5 m along the axis direction of the rolling track and draw a line at the sampling boundary to make a mark.On the same number of rolling paths,along the axis direction of the rolling trajectory,the compaction degree of the fill near a certain point was measured every 6 m using the cutting ring method,Platts penetration method,nuclear densitometer method,and harmonic method.The average relative error(EMR),standardized root mean square error(ENRMS),determination coefficient(R2),and consistency index(IA)were used to evaluate the differences between various methods with the cutting ring method,and a linear equation was used to establish the relationship between various methods with the cutting ring method.The results showed that with the increase in rolling times,the compaction degree by the cutting ring method showed an increasing trend.After 2 or 3 times of vibration rolling,the compaction degree of the soil has reached the project’s speci
作者
张心欣
任晓磊
王永亮
曹林宽
ZHANG Xinxin;REN Xiaolei;WANG Yongliang;CAO Linkuan(Hebei Institute of Water Science,Shijiazhuang 050057,China)
出处
《南水北调与水利科技（中英文）》
CAS
CSCD
北大核心
2024年第1期166-174,共9页
South-to-North Water Transfers and Water Science & Technology
基金
河北省水利科研计划项目(2019-07)。
关键词
压实度
环刀法
普氏贯入法
核子密度仪法
谐波法
compaction quality
cutting ring method.
Platt penetration method
nuclear densitometer method
harmonic method
