土石坝分层液压夯实填筑压实特性研究  

Study on Compaction Characteristics of Layered Hydraulic Compaction Filling for Earth-Rockfill Dam

作　　者：陈晓燕 厉超 齐明杰 徐勇 张宏博 张学林 CHEN Xiao-yan;LI Chao;QI Ming-jie;XU Yong;ZHANG Hong-bo;ZHANG Xue-lin(Jinan Water Engineering Service Center,Jinan 250061,China;School of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China;School of Qilu Transportation,Shandong University,Jinan 250002,China;Jinan Juyuan Water Service Co.,Ltd.,Jinan 250100,China)

机构地区：[1]济南市水利工程服务中心,山东济南250061 [2]山东建筑大学交通工程学院,山东济南250101 [3]山东大学齐鲁交通学院,山东济南250002 [4]济南聚源水务有限公司,山东济南250100

出　　处：《水电能源科学》2024年第1期98-101,31,共5页Water Resources and Power

基　　金：山东省自然科学基金项目(ZR2022QE082)。

摘　　要：为探究液压夯实法加固土石坝的压实性能,基于动量守恒理论,设计开展分层液压夯实现场试验,研究分层液压夯实的压实特性,并优化工艺参数。研究结果表明,液压夯动应力沿深度按圆形均布荷载下地基附加应力分布,不同深度土体动应力随夯击次数增加而增大,至土体密实而趋于稳定;液压夯单次沉降量随夯击次数增加而减小,累计夯沉量随夯击次数增加逐渐增大并最终达到稳定值;液压夯主加固区为椭球形,增大单击夯击能可增加主加固区作用深度,提高土石坝有效压实深度;试验结果表明,土体初始干密度为1.79 g/cm^(3)时,夯击能18、27、36 kJ最优夯击次数宜分别为6、6、9击,加固深度分别为1.9、2.1、2.3 m。研究成果可为工程实践提供参考。In order to study the compaction performance of earth-rockfill dam reinforced by the hydraulic compaction method,the field test of layered hydraulic compaction was carried out to study the compaction characteristics of layered hydraulic compaction based on the momentum conservation law,and the optimization technological parameters were put forward.The results show that the dynamic stress of hydraulic compaction soil is distributed according to the additional stress of foundation under circular uniform load along the depth.The soil dynamic stress at different depths increases with the increase of tamping times until the soil becomes compact and tends to be stable.The single settlement of the layered hydraulic compaction gradually decreases with the increase of the tamping times,and the cumulative settlement gradually increases with the increase of the tamping times and finally reaches a stable value.The main reinforcement zone of the layered hydraulic compaction is ellipsoidal,and increasing the click-compaction energy can increase the depth of the main reinforcement zone and thus improve the effective compaction depth of the earth-rock dam.The results show that the optimal compaction times of 18 kJ,27 kJ and 36 kJ are 6,6 and 9 when the initial dry density of the soil is 1.79 g/cm^(3),and the reinforcement depths of the earth-rockfill dams are 1.9 m,2.1 m and 2.3 m,respectively.The research results can provide reference for engineering practice.

关 键 词：土石坝 分层液压夯 压实特性 夯实试验 

分 类 号：TV541.1[水利工程—水利水电工程]