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<p>The engineered slopes in stratified sedimentary rocks are prone to various agents of weathering and progressive degradation of rock mass. A weathered profile is developed typical of a particular rock type in the cut slope section. Several external factors such as temperature, moisture, climate, anthropogenic activities etc. contribute to creating the weathering profile. Desiccation-induced cracking plays a crucial role in the weathering and long-term stability of sedimentary rock slopes, particularly under varying climatic conditions. The Vindhyan rocks in Sohagi village, Rewa is a prime example of development of variable weathering profile along the cut slopes. The rocks are stratified and occur as shale, sandstone succession with minor variation such as sometime rich in clay minerals like glauconite, chlorite and kaolinite. The present study aims to understand some of the engineering characteristics of the weathered material and desiccation crack characteristics which often leads to slope failure. Overall, the results indicate that the environment, mineralogy and grain size have significant control on the development of desiccation cracks, weathered slope profile and other&#xa0;properties. Sun-drying accelerates the onset and propagation of cracks, leading to the formation of dense, polygonal networks. The sample containing glauconite, chlorite, smectite in Glauconitic sandstone (C1) has the highest liquid limit and plastic limit along with shear strength than Sandstone (C3) and Red shale (C5) and showed delayed crack onset but dense networks due to moisture retention. The interaction of desiccation cracks with bedding planes facilitates deeper weathering, structural weakening, and pose potential long term threat to the stability of slopes.</p>

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Influence of Desiccation Cracks on Weathering and Instability of Sedimentary Slopes in the Vindhyan Basin

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Digvijay Singh,
  • Prakash Kumar Singh,
  • Arun Kumar Singh Kushwaha,
  • Nilesh Kumar Rai,
  • Ajay Kumar Yadav,
  • Akhil Kumar Sharma,
  • Harsh Yadav,
  • Anil Kumar Sahu,
  • Siddhartha Sankar Das

摘要

The engineered slopes in stratified sedimentary rocks are prone to various agents of weathering and progressive degradation of rock mass. A weathered profile is developed typical of a particular rock type in the cut slope section. Several external factors such as temperature, moisture, climate, anthropogenic activities etc. contribute to creating the weathering profile. Desiccation-induced cracking plays a crucial role in the weathering and long-term stability of sedimentary rock slopes, particularly under varying climatic conditions. The Vindhyan rocks in Sohagi village, Rewa is a prime example of development of variable weathering profile along the cut slopes. The rocks are stratified and occur as shale, sandstone succession with minor variation such as sometime rich in clay minerals like glauconite, chlorite and kaolinite. The present study aims to understand some of the engineering characteristics of the weathered material and desiccation crack characteristics which often leads to slope failure. Overall, the results indicate that the environment, mineralogy and grain size have significant control on the development of desiccation cracks, weathered slope profile and other properties. Sun-drying accelerates the onset and propagation of cracks, leading to the formation of dense, polygonal networks. The sample containing glauconite, chlorite, smectite in Glauconitic sandstone (C1) has the highest liquid limit and plastic limit along with shear strength than Sandstone (C3) and Red shale (C5) and showed delayed crack onset but dense networks due to moisture retention. The interaction of desiccation cracks with bedding planes facilitates deeper weathering, structural weakening, and pose potential long term threat to the stability of slopes.