Research on the correlation between PMT and SPT in loess silty clay
FAN Jiawei1，ZHANG Yufang2，YUAN Kun2，ZHOU Wenjiao2
(1. China Academy of Railway Sciences，Beijing 100081，China；2. Railway Engineering Research Institute，
China Academy of Railway Sciences Co.，Ltd.，Beijing 100081，China)
Abstract：Pressuremeter test and standard penetration test are two common in-situ test methods. Pressuremeter modulus，limit pressure，and standard penetration blows are the parameters to describe the mechanical properties of soil. The standard penetration test is a simpler and more cost-effective method. Pressuremeter test can obtain multiple mechanical parameters of soil，but the operation is complicated and expensive. This paper aims to reveal the characteristics of the loess silty clay pressuremeter modulus，limit pressure，and standard penetration blows with the change of natural moisture content of soil，and then to explore the experience expressions of pressuremeter modulus and limit pressure regarding to standard penetration blows. For this purpose，a railroad loess subgrade in Zhengzhou，Henan region was selected. 47 sets of pressuremeter tests and standard penetration tests were carried out. The empirical relationship among pressuremeter modulus，limit pressure，standard penetration blows，and natural moisture content of the soil was obtained by regression analysis. Hypothesis testing was carried out based on statistical analysis methods to verify the validity of the empirical relationship. The research results show that：with the increase of natural moisture content，the standard penetration blows，pressuremeter modulus，and limit pressure of loess silty clay in Zhengzhou area decrease linearly，respectively. When the natural moisture content increases to the plastic limit，the linear reduction rate of the standard penetration blows，pressuremeter modulus，and limit pressure all increase，respectively. A linear relationship between the pressuremeter modulus and the standard penetration blows is existed，and a linear relationship between the limit pressure and the standard penetration blows is existed. The hypothesis testing method F-test verifies the validity of empirical expressions for pressuremeter modulus and limit pressure. Compared with previous scholars' research，the empirical expressions obtained in this experiment has a higher coefficient of determination. The empirical expression fitting analysis method of the correlation between PMT and SPT used in this experiment is more applicable in loess silty clay. The research results provide a reference for the accurate and efficient acquisition of loess mechanical parameters in the survey and design of Zhengzhou loess area.
范家玮1，张玉芳2，袁 坤2，周文皎2. 黄土状粉质黏土PMT与SPT相关性研究[J]. 岩石力学与工程学报, 2023, 42(S1): 3823-3831.
FAN Jiawei1，ZHANG Yufang2，YUAN Kun2，ZHOU Wenjiao2. Research on the correlation between PMT and SPT in loess silty clay. , 2023, 42(S1): 3823-3831.
王吉利，刘怡林，沈兴付，等. 冲击碾压法处理黄土地基的试验研究[J]. 岩土力学，2005，26(5)：755-758.(WANG Jili，LIU Yilin，SHEN Xingfu，et al. Experimental investigation on treatment of loess subgrade with impaction and grind method(IGM)[J]. Rock and Soil Mechanics，2005，26(5)：755-758.(in Chinese))
[2]
王吉利，陈 盼，刘金龙. 谈预钻式旁压试验[J]. 岩石力学与工程学报，2020，39(增1)：2 911-2 919.(WANG Jili，CHEN Pan，LIU Jinlong. Discussion on the pre-boring pressuremeter test[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(Supp.1)： 2 911-2 919.(in Chinese))
[3]
OHYA S，IMAI T，MATSUBARA M. Relationships between N value by SPT and LLT pressuremeter results[C]// Proceedings of the 2nd European Symposium on Penetration Testing. [S. l.]：[s. n.]，1982：125-130.
[4]
YAGIZ S，AKYOL E，SEN G. Relationship between the standard penetration test and the pressuremeter test on sandy silty clays：a case study from Denizli[J]. Bulletin of Engineering Geology and the Environment，2008，67(3)：405-410.
[5]
CHESHOMI A，GHODRATI M. Estimating menard pressuremeter modulus and limit pressure from SPT in silty sand and silty clay soils. a case study in Mashhad，Iran[J]. Geomechanics and Geoengineering，2015，10(3)：194-202.
[6]
CHESHOMI A，BAKHTIYARI E，MASOUMI H. An empirical approach to estimate EPMT and PL of silty clays based on SPT[J]. Acta Montanistica Slovaca，2020，25(3)：310-323.
[7]
BOZBEY I，TOGROL E. Correlation of standard penetration test and pressuremeter data：a case study from Istanbul，Turkey[J]. Bulletin of Engineering Geology and the Environment，2010，69(4)：505-515.
[8]
KAYABASI A. Prediction of pressuremeter modulus and limit pressure of clayey soils by simple and non-linear multiple regression techniques：a case study from Mersin，Turkey[J]. Environmental Earth Sciences，2012，66(8)：2 171-2 183.
[9]
NASEEM A，JAMIL S M. Development of correlation between standard penetration test and pressuremeter test for clayey sand and sandy soil[J]. Soil Mechanics and Foundation Engineering，2016，53(2)：98-103.
[10]
NARIMANI S，CHAKERI H，DAVARPANAH S M. Simple and non-linear regression techniques used in sandy-clayey soils to predict the pressuremeter modulus and limit pressure：A case study of Tabriz subway[J]. Periodica Polytechnica Civil Engineering，2018，62(3)：825-839.
[11]
ÖZVAN A，AKKAYA ?，TAPAN M. An approach for determining the relationship between the parameters of pressuremeter and SPT in different consistency clays in Eastern Turkey[J]. Bulletin of Engineering Geology and the Environment，2018，77(3)：1 145-1 154.
[12]
FIRUZI M，ASGHARI-KALJAHI E，AKGÜN H. Correlations of SPT，CPT and pressuremeter test data in alluvial soils. Case study：Tabriz Metro Line 2，Iran[J]. Bulletin of Engineering Geology and the Environment，2019，78(7)：5 067-5 086.
[13]
ZAKI，M F M，ISMAIL，et al. Correlation between PMT and SPT results for Kenny Hill Formation[J]. Bulletin of the Geological Society of Malaysia，2019，68：141-146.
[14]
杨 锋. 饱和软黄土地铁隧道施工地表沉降特性及其控制技术[博士学位论文][D]. 西安：西安科技大学，2017.(YANG Feng. Surface Subsidence Characteristics and Control Technology of Subway Tunnel Construction in Saturated Soft Loess[Ph. D. Thesis][D]. Xi?an：Xi?an University of Science and Technology，2017.(in Chinese))
[15]
肖先波. 黏性土旁压试验与标准贯入试验土体参数相关性分析[J]. 施工技术，2017，46(17)：131-135.(XIAO Xianbo. Correlation analysis of parameters of clayey soils derive from pressuremeter test and standard penetration test[J]. Construction Technology，2017，46(17)：131-135.(in Chinese))
[16]
沈 振，屈鹏飞，孟轲荆，等. 旁压试验和标准贯入试验与砂土变形模量的相关性[J]. 岩土工程技术，2021，35(6)：416-419.(SHEN Zhen，QU Pengfei，MENG Jingke，et al. Correlation between pressuremeter test and standard penetration test on sand deformation modulus[J]. Geotechnical Engineering Technique，2021，35(6)：416-419.(in Chinese))
[17]
SEMIZ B，ÇELIK S B. Mineralogical and geochemical characteristics of Belevi clay deposits at Denizli，SW Turkey：industrial raw material potential[J]. Arabian Journal of Geosciences，2020，13(8)：1-12.
2023, Vol. 42 
