Loess characteristics
Witryna10 lut 2024 · Tang, K. Characteristics and perspectives on scientific discipline of soil erosion and soil and water conservation in China. Res. Soil Water Conserv. 1999, 6, 2–7. [Google Scholar] Zheng, J.; Wu, R.; Zhai, L. Distribution of soil fertility in Zhifang gully watershed of the loess hilly region. Bull. Soil Water Conserv. 1996, 16, 26–30 ... Witryna13 sty 2024 · Characteristics of rare earth elements in Pingyin loess profile, Shandong Province and its implications for provenance. [In Chinese with English abstract.] [In Chinese with English abstract.] Journal of Arid Land Resources and Environment 29 , …
Loess characteristics
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Witryna3 maj 2024 · In this paper, a new model of undisturbed loess was presented based on the modified Cam-clay model with the structural and anisotropic parameters. The associated flow rule, combined with the consistency condition, was used to derive the incremental stress-strain relationship and establish a new model. The new model has … Witryna2 lut 2024 · Finally, the development stages of loess landform in three watersheds were explored based on their population characteristics. The results showed that: (1) The …
Witryna11 paź 2024 · The creep characteristics of loess are studied by step loading (vertical pressure at all levels is 125 kPa, 175 Pa, 225 kPa, and 275 kPa), and the whole creep process characteristic curves of loess under different stress conditions are obtained. An endoscope was placed in the hole to observe the deformation and failure … Witryna27 gru 2024 · Damage to soil structure caused by strong earthquakes is one of the main reasons for post-earthquake geohazard development. To investigate the nonlinear dynamic behaviors of the post-earthquake loess, a pre-shock reconsolidation test was designed to simulate the process of the loess undergoing earthquake and post …
Witryna19 mar 2024 · Study on the Dynamic Characteristics of Loess 1. Introduction. Loess is a kind of special soil with unique overhead pores and a cemented structure that … Witryna28 cze 2024 · Permeability characteristics of compacted loess is always an important topic in soil mechanics and geotechnical engineering. This study explored the …
WitrynaA method of load calculation in a tunnel was adopted in consideration of the state of covering depth. Due to the macropore characteristics of loess soil, the existing demarcation regulations of deep and shallow tunnels are inappropriate for large-section and shallow loess in highway tunnels. To determine the load of large-section loess …
Witryna1 sty 1992 · The topmost 16 metres of the loess section at Xifeng (central Chinese loess plateau), which cover the last 128 000 years, consist of two palaeosol beds interlayered by a loess horizon. Hysteresis parameters, frequency-dependent, field- and temperature-dependent susceptibility show very similar and stable magnetic mineral constituents in … reforming of petroleum pptWitryna19 kwi 2024 · Characteristics of Shear Strength and Deformation of Compacted Q3 Loess. To explore the factors affecting the shear strength of compacted loess, direct … reforming of hydrocarbonsWitryna7 kwi 2024 · Considering their occurrence in loess or paleosol units, we labeled them from top to bottom as L4-1, S4-1, S4-2, L5-1 and S5/L5-1. Their characteristics are shown in Fig. 4b and summarized in ... reforming new yorkWitryna19 mar 2024 · Seismic subsidence of loess had been verified by microstructure characteristic, dynamic triaxial test and in situ simulation test using blasting vibration. It has gradually become a significant subject in the field of geotechnical earthquake engineering. Loess is widely distributed in China, which typically has a loose … reforming ny pilatesWitryna13 mar 2024 · As a typically structured soil, loess is characterized as porosity, structural and collapsible 2, 3, 4, 5, 6, 7, 8. Accordingly, it is important to study collapsibility of … reforming petrolioWitryna16 mar 2024 · Abstract. Loess tunnels are a common geo-hazard in the Loess Plateau and not only cause considerable soil and water loss, but also aggravate … reforming observer focusedWitrynaThe Chinese Loess Plateau, or simply the Loess Plateau, is a plateau in north-central China formed of loess, a clastic silt-like sediment formed by the accumulation of wind-blown dust. It is located southeast of the Gobi Desert and is surrounded by the Yellow River.It includes parts of the Chinese provinces of Gansu, Shaanxi and Shanxi. The … reforming our union