考虑配合比的砂泥岩混合填料剪切蠕变力学特性  

Shear creep mechanical properties of sand shale mixed filler considering mix ratio

作　　者：蔺国骞 曹利军 LIN Guoqian;CAO Lijun(Gansu Transportation Planning Survey and Design Institute Co.,Ltd.,Lanzhou 730030,China;Shuifa Planning and Design Co.,Ltd.,Jinan 250014,China)

机构地区：[1]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030 [2]水发规划设计有限公司,山东济南250014

出　　处：《水运工程》2024年第4期189-195,共7页Port & Waterway Engineering

基　　金：山东省自然科学基金项目(ZR2018BEE050)。

摘　　要：砂泥岩混合填料的配合比是影响码头地基承载性能及稳定性的关键因素。为研究不同配合比下砂泥岩混合填料土的蠕变力学特性,开展剪切蠕变试验。结果表明,在同一配合比下,随着剪应力加载等级的提高,瞬时、蠕变应变量及初始、稳态蠕变速率均呈逐渐递增趋势;当处于同样加载等级时,初始、稳态、极限加速蠕变速率及瞬时、蠕变应变量均随配合比中泥岩颗粒占比增大而呈递增趋势;混合填料长期强度折减较大,折减范围为50.53%~66.95%,长期强度随配合比中泥岩颗粒占比增大而递减。研究成果可为码头砂泥岩混合填料地基长期稳定性评价提供一定参考。The mix ratio of sand-mudstone mixed filler is a key factor affecting the bearing capacity and stability of the wharf foundation.To study the creep mechanical properties of sand shale mixed fill soil under different mix proportions,shear creep tests are carried out.The results show that under the same mix ratio,the instantaneous and creep strain and the initial and steady creep rates increase gradually with the increase of the loading level of shear stress.When at the same loading level,the initial,steady-state,and ultimate accelerated creep rates,as well as instantaneous and creep strains,all show a decreasing trend with the increase of the proportion of mudstone particles in the mix ratio.The long-term srength reduction of mixed filler is relatively large,ranging from 50.53%to 66.95%,and the long-term strength decreases with the increase of the proportion of mudstone particles in the mix ratio.The research results can provide some references for the long-term stability evaluation of the mixed sand-mudstone filling foundation of the wharf.

关 键 词：码头地基 砂泥岩 混合填料 配合比 剪切蠕变 长期强度 

分 类 号：U655[交通运输工程—港口、海岸及近海工程]