海相淤泥水泥土力学性能室内试验研究  

Laboratory Study on Mechanical Properties of Marine Silt Cement Soil

作　　者：李红彦[1] 俞文锋 李海娜[1] 余超群 肖景华 LI Hongyan;YU Wenfeng;LI Haina;YU Chaoqun;XIAO Jinghua(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,China)

机构地区：[1]广东省水利水电科学研究院,广州510610

出　　处：《广东土木与建筑》2023年第1期106-108,共3页Guangdong Architecture Civil Engineering

摘　　要：为了进一步了解淤泥水泥土的特性以及为软基施工提供数据参考,通过选取水泥搅拌桩施工现场具有代表性的海相淤泥为研究对象,对不同水泥掺量和养护龄期下的水泥土无侧限抗压强度、压缩试验及渗透试验展开研究,最终得到水泥土的各项力学特性指标,并初步探讨了无侧限抗压强度与渗透系数和压缩系数之间的相关性。结果表明:水泥土无侧限抗压强度和压缩模量随养护龄期增长和水泥掺入量的增大逐渐增加,而水泥土的压缩系数和渗透系数则逐渐降低。水泥土无侧限抗压强度在0.5~2 MPa范围时,渗透系数和压缩系数随无侧限抗压强度的增大而迅速降低;无侧限抗压强度达到2 MPa以上后,变化幅度趋缓。In order to further understand the characteristics of silt cement soil and provide data reference for soft foundation construction,this paper selects the representative Marine silt of cement mixing pile as the research object,for different cement mix and curing age of cement soil unlimited compression strength,compression test and permeability test,finally get the mechanical characteristics indexes of cement soil,and preliminarily discusses the correlation between unconfined compressive strength and permeability coefficient and compression coefficient.The results show that the unconfined compressive strength and compression modulus of cement soil increase gradually with the increase of maintenance age and cement incorporation,while the compression coefficient and permeability coefficient of cement soil gradually decrease.When the unconfined compressive strength of cement soil is ranging from 0.5 MPa to 2 MPa,the permeability coefficient and compression coefficient decrease rapidly with the increase of unconfined compressive strength;the change range decreases after reaching above 2 MPa.

关 键 词：海相淤泥 水泥土 无侧限抗压强度 压缩 渗透 

分 类 号：TU447[建筑科学—岩土工程]