黄军

摘 要：针对越南沟山塘碾压风化料坝无溢洪道、坡度较陡、淤积严重等问题，结合工程地质条件和渗漏现状，本文对除险加固方案进行了详细论证分析和设计计算。渗透稳定和坝坡稳定分析结果表明：大坝除险加固后水库病险问题得到成功处理，各工况条件下的安全系数均满足规范指标要求。坝体结构设计合理可行，坝坡稳定性高，加固修复效果显著。

关键词：渗漏;除险加固;稳定性分析;越南沟山塘

中图分类号：TV641.32文献标识码：A文章编号：1003-5168（2021）10-0048-03

Reinforcement Design Scheme of Rolling Weathered Material Dam in Yuenangou Pond

HUANG Jun

（Guizhou Tuotu Resources Development Co.， Ltd.，Guiyang Guizhou 550002）

Abstract： In view of the problems such as no spillway， steep slope and serious siltation in weathered material dam of Yuenangou Pond， combined with the engineering geological conditions and leakage status， the detailed analysis and design calculation of reinforcement plan are carried out in this paper. The analysis results of seepage stability and dam slope stability showed that： after the dam reinforcement， the dangerous problem of the reservoir had been successfully dealt with， and the safety factor under each working conditions could meet the requirements of the specification index， and the dam structure design was reasonable and feasible， the dam slope stability was high， which had remarkable reinforcement and repair effects.

Keywords： leakage;reinforcement;stability analysis;Yuenangou pond

1 工程概况

越南沟山塘工程位于贵州省毕节市赫章县双坪彝族苗族乡金山村境内，距双坪彝族苗族乡政府16 km，距离赫章县城约52 km。越南沟山塘所在越南沟属于长江流域乌江水系一级支流六冲河的上游支家沟支流，发源于朱红山正东方向大山脚，河源高程2 150.00 m。越南沟流域面积0.56 km2，主河道长1.68 km，河床平均比降为123.8‰。坝址以上集雨面积0.34 km2，主河道长0.76 km，河床平均坡降139.4‰。越南沟山塘工程任务为人饮水供水，供水范围为双坪彝族苗族乡金山村，解决1 557人的饮水安全问题。越南沟山塘枢纽由大坝、溢洪道、取水兼放空建筑物等组成，山塘正常蓄水位2 106.00 m，校核洪水位2 107.16 m，正常蓄水位以下库容4.15万m3，总库容5.01万m3。工程总库容小于0.001×108 m3，按小（2）型水库进行设计，工程等别为Ⅴ等。

2 坝址区工程地质条件

坝区处于侵蚀地貌的浅切中山区，坝址河谷为较对称“V”形谷，河谷走向为北偏西53°，总体表现为纵向谷。河床地形平坦，无陡坎，跌水。河床高程2 102.0～2 103.0 m，正常蓄水位在2 106.0 m时，谷口宽为46.5 m，宽高比为9.3。……