Development of Soil Cracks in Granite Benggang Area Under Wetting-drying Cycles

• Published in: Shui tu bao chi xue bao Vol. 38; no. 5; pp. 262 - 271
• Main Authors: HAN Jiexin, DENG Zhihui, WANG Jingmi, DENG Yusong, HUANG Zhigang, DUAN Xiaoqian
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Journal of Soil and Water Conservation 01.10.2024
• Subjects: benggang erosion; fissure; granitic red soil; wetting-drying cycles
• ISSN: 1009-2242
• DOI: 10.13870/j.cnki.stbcxb.2024.05.036

[Objective] Soil cracks can change soil structure, reduce soil stability, and then accelerate the development of hill collapse. It is of great practical significance to study deeply the fracture development law of granite Benggang area under wetting-drying cycles. [Methods] 7 samples of granite slope soil were taken as the research objects, including the upper part of the slope (US), the middle part of the slope (MS), the lower part of the slope (DS), the red soil layer of wall collapse (RL), the transition layer of wall collapse (TL), the sand layer1 of wall collapse (SL1) and the sand layer2 of wall collapse (SL2). The wetting-drying cycles experiments were carried out with these samples. Combined with digital image processing technology, the soil surface cracks are quantitatively analyzed. [Results] (1) Soil Rsc, Na and soil fragmentation degree in granite Benggang area increase with the decrease of water content, the Rsc, Na, Wa and La of 7 sample points show a gradual decrease with the increase of dry an