首页|平动模式下墙后有限黏性填土破坏模型试验研究

平动模式下墙后有限黏性填土破坏模型试验研究

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以挡土墙背和临近建筑物间的有限黏性填土为研究对象,通过透明土的模型试验以及PIVlab的图像分析,研究平动模式下墙后土体变形特征及破坏规律.结果显示:在挡土墙背离填土平动的过程中,剪切滑动面逐渐形成,并产生二次滑动,最终演变为一条由墙踵贯穿至填土表面的二次曲线形滑动面,与水平方向夹角为57°,填土有限与半无限的界限为b/h=0.7;有限宽度下填土的破坏形式与半无限工况不同,滑动面在临近建筑物墙面产生交点,与水平方向夹角约为55°,未出现砂土"反射"多道的现象.
Model test study on failure of finite cohesive backfill behind retaining wall under translational mode
Based on the model test of transparent soil and the image analysis of PIVlab,the deformation charac-teristics and failure rules of soil behind the retaining wall under the translational mode are studied by taking the finite cohesive fill between the back of the retaining wall and adjacent buildings as the research object.The re-sults show that in the process of the retaining wall moving away from the backfill,the shear sliding surface gradually forms and produces secondary sliding,and finally evolves into a quadratic curved sliding surface run-ning from the wall heel to the fill surface,with an angle of 57° to the horizontal,and the limit between finite and semi-infinite fill is b/h=0.7.The failure mode of the backfill under the finite width is different from that under the semi-infinite condition.The sliding surface has an intersection point on the wall of the adjacent buid-ing,with an angle of about 55° to the horizontal,and there is no multiple reflection like sand.

translational modefinite cohesive backfillsoil failure modesliding surface characteristics

王润北、吴能森

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福建农林大学 交通与土木工程学院,福建 福州 350108

平动模式 有限黏性填土 土体破坏模式 滑动面特征

福建农林大学产学合作项目

KH1500590

2024

河南城建学院学报
河南城建学院

河南城建学院学报

影响因子:0.457
ISSN:1674-7046
年,卷(期):2024.33(4)
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