文献类型：期刊文献

中文题名：固化湛江组粘土回填坑槽在地下水和车辆荷载长期作用下性能演化

英文题名：Long-term Performance Evolution of Solidified Zhanjiang Group Clay Backfilled Trenches under Prolonged Groundwater and Vehicle Load Effects

作者：祝海波[1];边金[2];邱鑫[1];关泽睿[1]

机构：[1]湛江市润通水务工程有限公司,湛江524005;[2]广东海洋大学海洋工程与能源学院,湛江524088

年份：2025

卷号：44

期号：36

起止页码：17

中文期刊名：价值工程

外文期刊名：Value Engineering

语种：中文

中文关键词：固化剂;湛江组粘土;地下水;耐久性;荷载扩散

外文关键词：curing agent;Zhanjiang Group clay;groundwater;durability;load diffusion

中文摘要：作为生命线工程的地下供水管线系统,其稳定工作极其重要。地基不均匀沉降对于地下管线系统的破坏尤为严重,国内外都发生过多次由于场地不均匀沉降带来的埋地管道破坏事故。在本文中,使用固化剂和吸水材料对湛江组粘土进行了固化处理,制作成蚝壳混合土,将其作为管道坑槽填料。通过室内试验确定最优配合比,测定其强度为0.2-0.45MPa。然后,通过FLAC3D对采用固化处理的湛江组粘土回填的坑槽在地下水和车辆荷载长期作用下的性能进行了分析研究,发现在刚竣工时,蚝壳粉混合土刚度大,这使车辆荷载得到扩散,降低了路面层的剪应力,保护路面不致破坏,公路各层的沉降分布均匀,整体下沉;随着运营时间增加,填筑材料的刚度降低,荷载扩散作用减弱,车辆荷载在面层中产生应力集中,导致其剪应力增大,从而产生了倾斜和沉降差,但仍然能满足设计和使用要求。

外文摘要：As a lifeline project,the stability of underground water supply pipeline systems is extremely critical.Uneven foundation settlement poses severe damage to underground pipeline systems,with numerous buried pipe failures caused by ground settlement occurring both domestically and internationally.In this study,the Zhanjiang Formation clay was stabilized using solidifiers and water-absorbing materials,forming oyster shell mixed soil as a trench backfill material.Through laboratory tests,the optimal mix ratio was determined,yielding a strength of 0.2~0.4 MPa.FLAC3D was then employed to analyze the performance of the stabilized Zhanjiang Formation clay backfilled trenches under long-term groundwater and vehicle load effects.The findings revealed that immediately after construction,the high stiffness of the oyster shell powder mixed soil effectively diffused vehicle loads,reducing shear stress in the pavement layer and preventing surface damage.The settlement distribution across all pavement layers was uniform,resulting in overall subsidence.However,as operational time increased,the stiffness of the backfill material decreased,weakening load diffusion.This led to stress concentration in the surface layer under vehicle loads,causing elevated shear stress and resulting in tilting and differential settlement(specify numerical values).Despite these effects,the material remained capable of meeting design and service requirements.