Evaluation of dynamic characteristics of silt in Yellow River Flood Field after freeze-thaw cycles

作     者：JIN Qing ZHENG Ying-jie CUI Xin-zhuang CUI She-qiang QI Hui ZHANG Xiao-ning WANG Shuai 金青;郑英杰;崔新壮;崔社强;齐辉;张小宁;王帅

作者机构：School of Civil EngineeringShandong UniversityJi’nan 250061China Department of Civil and Environmental EngineeringHong Kong Polytechnic UniversityKowloonHong Kong Qilu Transportation Development GroupJi’nan 250101China 

基　　金：Project(2018YFB1600100) supported by the National Key Research and Development Project of China Projects(51778346, 51508310) supported by the National Natural Science Foundation of China Project(2019GSF111007) supported by Key Research and Development Project of Shandong Province, China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2020年第27卷第7期

页      码：2113-2122页

摘      要：Frothing is a main disease of highways in Yellow River Flood Field, due to the loss of dynamic strength of roadbed soils under the couple effects of temperature, salt, and vehicle traffic load. This is strongly linked to the dynamic characteristics of silt in this region. To analyze these couple effects on the dynamic characteristics of silt, a series of tests(i.e., freeze-thaw cycling tests, vibration triaxial tests and ultrasonic wave velocity tests) were conducted and two kinds of silt(i.e., salt-free and 3%-salt silt) were designed. The results indicate that the dynamic shear strength and dynamic modulus decrease with increasing freeze-thaw cycles, while the damping ratio simultaneously increases. Furthermore, compared to salt-free silt, the decrement of dynamic shear strength and dynamic modulus of silt with 3% salt is more significant, but the damping ratio of 3%-salt silt is larger. In ultrasonic wave velocity tests, ultrasonic wave velocity of frozen soil specimens decreases as the number of freeze-thaw cycles increases. Based on the results of ultrasonic wave velocity tests, a preliminary model is proposed to evaluate damage of silt through field measurement ultrasonic data. The study could provide a theoretical basis for the treatment of silty soil highway.

主 题 词：silt of Yellow River Flood Field dynamic triaxial soil dynamic characteristic ultrasonic wave velocity 

学科分类：081401[081401] 08[工学] 0814[工学-地质类] 

核心收录：

D　O　I：10.1007/s11771-020-4434-7

馆 藏 号：203958630...