人民长江2024，Vol.55Issue(7)：123-129,7.DOI:10.16232/j.cnki.1001-4179.2024.07.016
复杂岩溶地区火成岩对建坝成库的影响
Influence of igneous rocks on dam and reservoir construction in complex karst areas:case of Zhangjiazhai Reservoir
摘要
Abstract
The Zhangjiazhai Reservoir is located in a karst developed area,where the igneous rocks have formed new structural interfaces and cut across the distribution of original rock layers,thereby altering the hydrogeological conditions.Therefore,a thor-ough investigation of the geological structural features of the reservoir,the differential weathering processes of diverse lithologies,and the repercussions of igneous rock distribution on karst development are imperative for the successful execution of engineering projects.Research findings have unveiled that:regions dominated by basalt have notable levels of weathering depth,playing a crit-ical role in site selection for dam construction.Moreover,the interface between diabase intrusions and thin limestone layers exhib-its differential weathering,with certain sections demonstrating cohesive closures,which is suitable for foundational support layers and the lower boundary of grouting curtains within the low-flow zone of the subsurface aquifer.Conversely,localized regions at these interfaces have spawned deep weathering troughs,leading to a reduction in the engineering geological parameters of the rock mass,which can not meet the requirements of dam foundation construction,and it is necessary to adopt specialized engineering measures.Furthermore,the intrusion of diabase into the central region of the limestone quarry has resulted in a substantial reduc-tion in material reserves,posing challenges to the procurement of construction materials for the reservoir project.The research find-ings can provide valuable references for similar engineering projects.关键词
岩溶地区/火成岩/建坝成库/茅口组灰岩/侵入体/张家寨水库Key words
karst area/igneous rock/dam and reservoir construction/Maokou formation limestone/intrusion body/Zhangji-azhai Reservoir分类
建筑与水利引用本文复制引用
余加松,伍登浩,顾兴华..复杂岩溶地区火成岩对建坝成库的影响[J].人民长江,2024,55(7):123-129,7.基金项目
中国电建集团贵阳院科技项目"水电工程地质评价标准化及平台开发研究"(YJZD2023-03) （YJZD2023-03）
