饱和软土非平行等效时间线流变一维固结分析  

One-dimensional Consolidation Analysis of Saturated Soft Soil with Non-parallel Equivalent Timeline Rheological Model

作　　者：俞南均 陈缘 汪锋 施倩红 YU Nanjun;CHEN Yuan;WANG Feng;SHI Qianhong(Hangzhou Construction Quality and Safety Supervision Station,Hangzhou 310005,China;Powerchina Huadong Engineering Corporation Limited,Hangzhou 311122,China;Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Zhejiang Research Center on Smart Rail Transportation,Hangzhou 310030,China)

机构地区：[1]杭州市建设工程质量安全监督总站,浙江杭州310005 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]浙江大学滨海和城市岩土工程研究中心,浙江杭州310058 [4]浙江省智慧轨道交通工程技术研究中心,浙江杭州310030

出　　处：《土木工程与管理学报》2024年第2期24-30,共7页Journal of Civil Engineering and Management

基　　金：国家重点研发计划(2022YFB2602101)。

摘　　要：在饱和软土非平行等效时间线流变模型基础上,综合考虑软土地基成层性和非线性特点,利用半解析法对地基一维固结控制方程进行求解分析。采用Fortran语言编制相关计算程序,将退化后的计算结果与已有的平行等效时间线下的流变固结解进行对比,验证该解答的正确性。利用该程序分析饱和软土地基流变固结性状,分析讨论了非平行线参数ζ对土体次固结系数的影响,以及非平行等效时间线流变固结下有效应力定义的固结度和地表总沉降的增长规律。分析结果表明:非平行等效时间线模型的次固结系数随自重应力和有效应力的增大而减小,且减小速率取决于ζ值大小;非平行等效时间线下的流变特性主要对主固结后期和次固结阶段影响显著,ζ值越大,主固结完成越早,后期次固结沉降量越小。In this study,based on the non-parallel equivalent timeline viscoelastic model for saturated soft soil,the layered characteristics and nonlinear behavior of the soil foundation are comprehensively considered.The one-dimensional consolidation governing equations of the foundation are solved and analyzed using a semi-analytical method.The Fortran language is used to compile the program,and the degraded calculation results are compared with the existing rheological consolidation solutions under the parallel equivalent timeline to verify the correctness of the solution.The program is used to analyze the rheological consolidation behavior of saturated soft soil foundation.The effects of non-parallel line parameterζon secondary consolidation coefficient,the consolidation degree defined by effective stress and the growth law of ground settlement with the non-parallel equivalent timeline rheological model are discussed.The results show that the secondary consolidation coefficient of the non-parallel equivalent timeline model decreases with the increase of self-weight stress and effective stress,and the rate of decrease depends onζ.The non-parallel timelines mainly have a significant impact on the later stage of primary consolidation and the secondary consolidation.The higher the value ofζ,the earlier the completion of primary consolidation and the smaller the settlement of secondary consolidation.

关 键 词：饱和软土 成层地基 等效时间线 流变固结 半解析法 

分 类 号：TU43[建筑科学—岩土工程]