Longsheng Deng

Prof. Longsheng Deng


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 September 2020 in CATENA
Verified
Journal Article
Closed access
YWYa-Ni Wei
Ya-Ni Wei
WFWen Fan
Wen Fan
BYBo Yu
Bo Yu
LDLongsheng Deng
Longsheng Deng
TWTingting Wei
Tingting Wei

1 January 2019 in Engineering Geology
Verified
Journal Article
Closed access
WFWen Fan
Wen Fan
JLJiaojiao Lv
Jiaojiao Lv
YCYanbo Cao
Yanbo Cao
Mengfen ShenMengfen Shen
Mengfen Shen
LDLongsheng Deng
Longsheng Deng
YWYani Wei
Yani Wei


1 November 2018 in International Journal of Geomechanics
Verified
Journal Article
Closed access
LDLongsheng Deng
Longsheng Deng
WFWen Fan
Wen Fan
YYYueping Yin
Yueping Yin
YCYan-Bo Cao
Yan-Bo Cao
Young loess deposits are the most well-known collapsible soils because of their small unit masses, high void ratios, and open metastable structures. Properly assessing the collapse of loess sites covered by very thick interbedded loess–paleosol strata is complicated because the loess and paleosol layers possess significantly different permeability and collapsibility. The Tongchuan Loess Tableland is one site of such strata, and for this research, laboratory and field tests were conducted to obtain the physical and mechanical properties of the soil for each of the loess and paleosol layers. An in situ soaking test and corresponding computation were also conducted to explore the soaking process, seepage field, and collapse settlement characteristics of the site. Significant differences in collapse settlements were observed between the in situ soaking test and the computed result. The authors deduced that the strata of the test site, disturbances during extraction, drainage conditions, stress history, loading conditions, sampling interval, and magnitude of the collapse criteria could have been the reasons for the differences.

16 June 2020 in Bulletin of Engineering Geology and the Environment
Verified
Journal Article
Closed access
PDF file
YWYa-ni Wei
Ya-ni Wei
WFWen Fan
Wen Fan
NYNingyu Yu
Ningyu Yu
LDLongsheng Deng
Longsheng Deng
WTWei Tingting
Wei Tingting

1 August 2021 in International Journal of Geomechanics
Verified
Journal Article
Closed access
PDF file
LDLongsheng Deng
Longsheng Deng
WFWen Fan
Wen Fan
YCYu-Peng Chang
Yu-Peng Chang
BYBo Yu
Bo Yu
YWYa-Ni Wei
Ya-Ni Wei
TWTing-Ting Wei
Ting-Ting Wei
The Ma Lan loess is a typical structural soil due to its water sensitivity, collapsibility, and seismic vulnerability. In this study, Ma Lan loess samples were extracted from 17 sites distributed on the Loess Plateau, and field and laboratory tests were conducted to ascertain the physical and mechanical parameters of the loess. The optical microscopy-based serial sectioning method was adopted to systematically research the characteristics and regional variation in the microstructure of the Ma Lan loess. The results show that the relationships of the equivalent diameter of loess particles, pores, and throats versus the corresponding quantitative percentages satisfy the rational and Gaussian distributions, respectively, and that the channel length of the loess throat versus the quantitative probability can be accurately fitted by adopting the gamma distribution. The distributions of particle size and orientation, pore size, throat radius, and channel length of the Ma Lan loess show obvious regional zonation on the Loess Plateau, which are influenced by the factors of source properties, aeolian power, migration distance, erosional history, and so on. The microstructure of the Ma Lan loess can be classified into the following three categories: particle aerial structure (I), aggregation aerial structure (II), and flocculated structure (III); the loess in the northern Loess Plateau is primarily Category I, and the loesses from other locations are primarily Categories II and III.