隆德县余家峡水库特殊地质坝基处理与褥垫排水方案研究

Research on Dam Foundation Treatment and Cushion Drainage Scheme of Special Geology of Yujiaxia Reservoir in Longde County

本研究以余家峡水库设计施工中遇到的特殊地质问题为背景,探究了特殊地质条件下土坝坝基的处理和褥垫排水方案。首先,通过对特殊地质条件的分析,设计出合理有效的坝基处理方案,并成功解决了渗水问题。其次,通过被保护土的粒径分析和计算,确定了反滤层的最大粒径和级配范围,给出2.4m厚的坝基褥垫式排水体设计方案,并采用autobank计算软件验证坝基处理的合理性。本研究提供了一个可借鉴的土坝坝基处理和褥垫排水方案设计案例,为相关领域的研究提供了一定的启示。

This study investigates the treatment of dam foundations and cushion drainage schemes for special geological conditions based on the specific geological problems encountered in the design and construction of the Yujiaxia Reservoir.Firstly,through the analysis of special geological conditions,a reasonable and effective dam foundation treatment scheme was designed,and the seepage problem was successfully solved.Secondly,through the analysis and calculation of the particle size of the protected soil,the maximum particle size and grading range of the anti-seepage layer were determined.A 2.4-meter-thick cushion drainage body design scheme for the dam foundation was proposed,and the rationality of the dam foundation treatment was verified using the Autobank calculation software.This study provides a design example of dam foundation treatment and cushion drainage scheme that can be referenced and offers inspiration for research in related fields.