某平原土坝坝体裂缝分布特征与成因分析

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中图分类号：TV641 文献标志码：A 文章编号：1003-5168(2025)19-0044-06

DOI:10.19968/j.cnki.hnkj.1003-5168.2025.19.009

Analysis of theDistribution Characteristics and Causes of Cracks in an EarthFillDamona Plain

LI ChengzhongSUN Yibo (China Water Resources Beifang Investigation,Design and Research Co.,Ltd.,Tianjin 3Oo222, China)

Abstract: [Purposes] Addressing the structural cracks ina plain-type earth filldam,this study utilizes multi-sourcedata fusion to reveal the spatial distribution pattern of the crack system and clarify its formation mechanism.[Methods] Geological surveys of the dam body were conducted,employing geophysical exploration methods including the high-density electrical method,ground-penetrating radar method, and intermediate gradient method.These were complemented by driling exploration and experimental verification for a comprehensive analysis of the crack distribution characteristics and their causes. [Findings] The study indicates that the crack system exhibits significant stratification.Cracks in the shallow layer ( ⩽4 m)account for 82.2% ,with the maximum development depth of 7.2 m consistent with the dam height. Transverse cracks predominate (63.0% ),and the bimodal distribution of dip angles ( 34∘ } 86∘ )reflects shear-tensile composite failure induced by discontinuous compaction. Cause analysis identifies uneven filing and insufficient compaction as the dominant factors.[Conclusions] This study successfully identified the causes of the cracks in the dam body,providing valuable reference for the geological investigation and design of similar projects in the future.

Keywords: earth dam cracks; high-density electrical method; ground-penetrating radar;multi-source data fusion; geological exploration

0 引言

土石坝的裂缝根据成因类型分为干缩裂缝、冻融裂缝、滑坡裂缝、塑流裂缝和不均匀沉陷裂缝（即变形裂缝）。（剩余8864字）