软基上分期填筑土石坝方案的论证与实践  

Demonstration and implementation of earth-rockfill dam filling by stage in a soft

作　　者：李晓平 梅伟 张宝琼 樊勇 LI Xiaoping;MEI Wei;ZHANG Baoqiong;FAN Yong(Yunnan Water Conservancy and Hydroelectric Survey Design and Research Institute,Kunming 650021,China)

机构地区：[1]云南省水利水电勘测设计研究院,云南昆明650021

出　　处：《中国水利水电科学研究院学报》2017年第3期187-192,199,共7页Journal of China Institute of Water Resources and Hydropower Research

摘　　要：某土石坝坝轴线长达1172 m,在如此长的大坝地基范围内,分布有上第三系20多个地层,地层与地层之间的力学指标差异较大,地质条件十分复杂。如何解决坝体的不均匀沉降,是该拦河坝工程的关键技术问题。为解决这一技术难题,本文采用理论计算和离心模型试验相结合的方法,论证了采用分期、分段预压的设计和施工筑坝技术的可行性,水库建成3年后坝体沉降观测值3 cm事实,验证了该设计和施工方案的正确性。The length of an earth-rock dam is up to1172m,of which more than20strata make the mechanical index of those layers different.For such complex geological conditions,how to solve the problem of uneven settlement of the dam is the key to the project.In order to solve the technical problems,this paper proves the feasibility of pre-compaction in different periods and sections.The reservoir has been running for three years,and the fact that the observed value of the dam settlement is3cm,verifies the correctness of this design and program.

关 键 词：基础处理 不均匀沉降 处理对策 

分 类 号：TV641[水利工程—水利水电工程]