Open AccessCONSOLIDATION CHARACTERISTICS OF A SILTY CLAY: CONCERNING THE EFFECT OF SOIL DISTURBANCE
Author(s) -
Trần Thanh Nhàn,
Duong Phuoc Huy,
Nguyen Van Thien,
Đo Quang Thien,
Thi Phuong An Tran,
Hoàng Thị Sinh Hương
Publication year - 2021
Publication title -
trái đất và môi trường
Language(s) - English
Resource type - Journals
eISSN - 2615-9694
pISSN - 2588-1183
DOI - 10.26459/hueunijese.v130i4a.6083
Subject(s) - consolidation (business) , geotechnical engineering , silt , compressibility , geology , clay soil , soil science , soil water , geomorphology , engineering , accounting , business , aerospace engineering
In this paper, undisturbed specimen of a silty clay constituting of Phu Bai formation (ambQ21-2 pb) was collected from boreholes in Hue city and surrounding areas. The soil, under both undisturbed and disturbed conditions, was then subjected to standard one-dimensional consolidation tests with 7 loading increments. It is shown from the experimental results that the time to the end of primary consolidation (EOP), determined by Log Time method (tLT) and 3-t method (t3T), decreases with the load increment and under the same vertical stress, the primary consolidation of disturbed silty clay finish at a shorter time than those of the undisturbed one. The coefficient of secondary consolidation (Cα) increases with the vertical stress and reaches the maximum values before decreasing. The obtained values of Cα = 0.005 - 0.020 suggest a relatively low secondary compressibility of the silty clay constituting of Phu Bai formation.