Experimental study on the disintegration mechanism of consolidated purple soil in Three Gorges Reservoir area of China

被引：2
作者：
ZhengCheng Wang
ShiXin Zhang
HaiTao Mao
LongFei Cheng
Yan Sun
机构：
[1] Southeast University,Institute of Geotechnical Engineering
[2] Civil Engineering College,College of Urban and Rural Construction
[3] Three Gorges University,undefined
[4] Shanxi Agricultural University,undefined
来源：
Arabian Journal of Geosciences | 2022年 / 15卷 / 6期
关键词：
Three Gorges Reservoir Area of China; Purple soil; Disintegration; Consolidation; Water content;
D O I：
10.1007/s12517-022-09656-5
中图分类号：
学科分类号：
摘要：
Purple soil is widely distributed in the Three Gorges Reservoir area of China, and the disintegration characteristics of this soil play an important role in the formation and development of various geological disasters. A series of laboratory disintegration tests were conducted to study the disintegration mechanism of consolidated purple soil. The test results show that fine flaky or granular soil particles peeled off from the soil surface. The disintegration velocity showed a decreasing trend when water content was between 12 and 28%. The average disintegration velocity decreased significantly with increase in water content, and low water content had a significant effect. Increasing the consolidation pressure effectively restrained soil disintegration when the water content was less than or equal to 16%, but the effect was opposite when the water content was high. The main reasons for the disintegration of purple soil can be summarized as the dissolution of cementitious material, the water absorption and expansion of montmorillonite, the increase of thickness of the electric double layer and pore water (gas) pressure.
引用
收藏
相关论文
共 148 条
  • [1] Bao Y(2018)Dynamic changes of soil erosion in a typical disturbance zone of China’s Three Gorges Reservoir CATENA 169 128-139
  • [2] He X(2010)Determination of soil aggregate disintegration dynamics using laser diffraction Clay Miner 45 23-34
  • [3] Wen A(2007)Soil erosion in the boundary layer flow along a slope: a theoretical study Eur J of Mechanics-B/fluids 26 707-719
  • [4] Gao P(2002)A comparative study between mechanical, thermal and oxidative disintegration techniques of waste activated sludge Water Sci Technol 46 79-87
  • [5] Tang Q(2009)Relative contribution of various climatic processes in disintegration of clay-bearing rocks Eng Geol 108 36-42
  • [6] Yan D(2004)Variations in soil dispersivity across a gully head displaying shallow subsurface pipes, and the role of shallow pipes in rill initiation Earth Surf Process and Landf: the J of the Br Geomorphol Res Group 29 1143-1160
  • [7] Long Y(2015)Effects of temperature changes on soil hydraulic properties Soil and Tillage Res 153 145-154
  • [8] Bieganowski A(2015)Hydro-mechanical behavior of undisturbed collapsible loessial soils under different stress state conditions Eng Geol 195 28-41
  • [9] Ryżak M(2017)A durability classification of clay-bearing rocks based on particle size distribution of slaked material Environ Eng Geosci 23 125-136
  • [10] Witkowska-Walczak B(2000)Factors affecting the durability of selected weak and clay-bearing rocks from Turkey, with particular emphasis on the influence of the number of drying and wetting cycles Eng Geol 57 215-237
12345678910