Experimental Study on Engineering Properties of Large-Thickness Loess in Dongzhiyuan Area

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Xingyuan, Zhang^1^2 ; Tiecheng, Yan^1^2

Provincial Key Laboratory of Loess Engineering Properties and Engineering Application, Qingyang, Gansu Province

745000, China^1

School of Civil Engineering, Longdong University, Qingyang

745000, China^2

关键词: Consolidation tests;    Engineering properties;    Internal friction angle;    Lateral resistance;    Maximum dry density;    Standard penetration test;    Tri-axial shear tests;    Wave velocity test;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/3/032038/pdf
DOI  :  10.1088/1755-1315/233/3/032038

来源: IOP

【 摘 要 】

In this paper, the engineering properties of collapsible loess with large thickness in Dongzhiyuan Area is analyzed in detail through consolidation test, triaxial shear test, maximum dry density test, static penetration test, standard penetration test and site wave velocity test. The results show that: (1) the engineering properties of Malan loess in the upper part of collapsible loess in Dongzhiyuan Area are not so satisfying. With the increase of the depth, the void ratio of the loess becomes increasingly smaller while the cohesive force and internal friction angle increase gradually. The bearing capacity of the foundation increases, indicating that the engineering properties of the foundation soil become better. (2) At the same time, the static lateral resistance and point resistance of the foundation soil become increasingly larger, which is very beneficial to the friction piles in the large-thickness collapsible loess area.