寺坪水利枢纽砂砾石面板坝关键技术研究

湖北保湖北保康县寺坪水利枢纽大坝采用了大量使用河床砂砾石的面板坝方案，在当时可供借鉴的工程经验严重缺乏.为了能够在保障坝体安全的基础上充分利用天然砂砾石料和部分页岩料，在填料渗透特性、过渡料选用、软岩料利用、坝体断面优化、深厚砂砾石覆盖层强夯加固处理等关键技术方面进行了较系统的研究，取得了诸多新的认识.据此设计出的坝体断面和采用的填筑工艺，体现了砂砾石面板坝的先进设计理念与技术，工程运行以来沉降很小.本文简要介绍砂砾石面板坝的发展过程与寺坪砂砾石面板堆石坝关键技术的研究成果，以供类似工程参考.康县寺坪水利枢纽大坝采用了大量使用河床砂砾石的面板坝方案，在当时可供借鉴的工程经验严重缺乏.为了能够在保障坝体安全的基础上充分利用天然砂砾石料和部分页岩料，在填料渗透特性、过渡料选用、软岩料利用、坝体断面优化、深厚砂砾石覆盖层强夯加固处理等关键技术方面进行了较系统的研究，取得了诸多新的认识.据此设计出的坝体断面和采用的填筑工艺，体现了砂砾石面板坝的先进设计理念与技术，工程运行以来沉降很小.本文简要介绍砂砾石面板坝的发展过程与寺坪砂砾石面板堆石坝关键技术的研究成果，以供类似工程参考.

英文摘要:

Siping Hydropower Project Dam in Baokang County，Hubei Province is a face rockfill dam，where a large amount of riverbed sand and gravel are used as the main filling material.The available engineering experience for reference was in a large shortage at that time.In order to make full use of natural sand and gravel material and part of shale material and ensure the safety of the dam body，a systematic research was made on the key technologies such as the permeability characteristics of filling material， the selection of transition material， the utilization of soft rock material，the optimization of the dam body section，and the reinforcement of the deep sand and gravel overburden by dynamic compaction.These studies had achieved a lot of new insights.The successful construction of Siping dam embodies the advanced design concept and technology of sand and gravel filled concrete face dam.The settlement of the dam is very small since its operation.This paper briefly introduces the development process of sand-gravel filled concrete face dam and the key technologies of siping dam for reference of the possibly incoming similar projects in the future.

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