工程地质学报2016，Vol.24Issue(4)：682-692,11.DOI:10.13544/j.cnki.jeg.2016.04.026
特高坝地基深大断裂活动性与筑坝工程地质问题研究
DEEP FAULT ACTIVITY OF ESPECIALLY HIGH DAM FOUNDATION AND GEOLOGICAL ISSUES OF DAM ENGINEERING
雷世兵 1王启国 1邓争荣 1刘宇 1刘海峰 1刘世斌1
作者信息
- 1. 长江岩土工程总公司 武汉 武汉 430010
- 折叠
摘要
Abstract
This paper examines a planned hydropower station that is one of the important energy projects in overseas invested by China.It has a reservoir with high dam.Its water retaining structure is a roller-compacted concrete gravity dam of 200m high.The dam is located at a regional deep fault (F4 ).Activities of fault and feasibility of damming technology,as an important technical issue,is key to the establishment of hydropower station.Thus,a lot of work,including regional seismic geological investigation,geophysical prospecting,drilling, exploratory adit,fault age,field and indoor tests for rock and soil physical and mechanical properties,has been conducted.Results show that:(1 )Seismic activities in this fault are weak and the latest one is from 0. 1 42million to 0. 798million years ago.The fault is inactive since late Pleistocene.(2)Cataclastic rock belt and the faults F4-1 and F4-2 have the most influence on the dam.The fresh cataclastic rock mainly is theⅢ1 B class rock.TheⅣ1 B class rock only exists in F4 footwall.Faults F4-1 and F4-2,which is composed of the Ⅴ class rock,have bad engineering properties,and are the most weak part of dam foundation;(3)The possibility of building the dam at fault F4 to induce stereotype reservoir earthquake is less.The main engineering geological problem is deformation and seepage in dam foundation.Seepage stability can be dealt with through appropriate engineering measures such as deep digging and combining with backfilling concrete plug,consolidation grouting,deepening encryption and increasing the curtain row number.With results mentioned above all,an conclusion can be made that conducting hydropower projects on the fault F4 zone is viable in technical way.The results can only provide technical basis for hydropower station design and construction,but also technical reference for similar projects.关键词
200m级碾压混凝土重力坝/深大断裂/非活动断层/工程特征/工程地质问题/筑坝技术Key words
Roller-compacted concrete gravity dam/Deep fault/Inactive fault/Engineering characteristics/Engineering geological problem/Damming technique分类
建筑与水利引用本文复制引用
雷世兵,王启国,邓争荣,刘宇,刘海峰,刘世斌..特高坝地基深大断裂活动性与筑坝工程地质问题研究[J].工程地质学报,2016,24(4):682-692,11.
