Boundary friction mechanism of reinforced soil and reasonable design method of reinforced cut slope

加筋土边界摩擦机理及加筋路堑边坡合理设计方法

• 批准号: 05650465
• 负责人: MATSUI Tamotsu
• 金额: $ 1.41万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650465/
• 关键词: reinforced soil; reinforced slope; grid reinforcement; initial bend; pullout resistance; slope stability analysis; bearing capacity mechanism; design method; ハイブリッド斜面安定解析法; 境界摩擦; 拘束ダイレイタンシー; 地山補強; 合理的設計法

To investigate both mechanisms of bearing and boundary friction between steel-grid reinforcement and ground, the authours proposed a reasonable design method of reinforced slope, being based on experimental results and numerical simulations. The main conclusions are summerized as follows :1. The pullout tests of steel-grid reinforcement were carried out to investigate the bearing mechanism of gridreinforced wall, and the forces acting on longitudinal and transverse steel bars were evaluated. It was found that axial force of longitudinal bars significantly changed at location of transverse bars, and also that the diameters and surface conditions of longitudinal and transverse steel bars affected bearing and boundary friction mechanism.2.The pullout tests of steel-grid reinforcement with initial bend were carried out to investigate the effect of initial bend induced by overburden pressure or rolling compaction. It was found that the about 5 cm initial bend made 10% increase of the pullout resistance comparing with that of steel-grid reinforcement without initial bend.3.The authors applied hybrid slope stability analysis for a real cut slope, and examined the applicability of this design method. The authors also proposed a reasonable design method of real cut slope reinforced by rootpiles as a example.

为了研究钢格栅加筋土与地基之间的承载机理和边界摩擦机理，结合试验和数值模拟结果，提出了合理的加筋土边坡设计方法。主要结论如下：1.通过钢格栅钢筋的拉拔试验，研究了钢格栅加筋墙体的受力机理，并对纵向和横向钢筋的受力进行了分析。结果表明，纵筋轴力在横筋处发生显著变化，纵筋和横筋的直径和表面状况对承载力和边界摩擦力有影响。2.通过初始弯曲的钢格栅钢筋拉拔试验，研究了上覆压力和碾压引起的初始弯曲对钢格栅钢筋拉拔力的影响。结果表明，初始弯曲长度约为5 cm时，与未初始弯曲时的钢网加筋相比，抗拔力提高了10%。3.对一个真实的路堑边坡进行了混合边坡稳定性分析，验证了该设计方法的适用性。并以树根桩加固真实的路堑边坡为例，提出了合理的设计方法。

项目成果

T.Matsui,K.C.San&D.Leshchinsky: "Geosynthetic reinforced slopes:limit equilibrium and finite element analysises" Soils and Foundations. Vol.34 No.2. 79-85 (1994)

松井T.San K.C.

T.Matsui&K.C.San: "Failure test walls predicition by teh generalized plasticity theory(in Press)" Soils and Foundations. Vol.35. (1995)

松井先生

T.Matsui, Y.Nabeshima, U.N.Amin & T.Matsuda: "Pullout tests of grid reinforcement which has initial bend (in Press)" Proc.of annual conference of J.S.C.E.in Kansai Chapter. (1995)

T.Matsui、Y.Nabeshima、U.N.Amin

松井保・鍋島康之・Amin・松田拓: "初期たわみをもつグリッド補強材の引抜き試験(発表予定)" 平成7年度土木学会関西支部年次学術講演会講演概要集. (1995)

Tamotsu Matsui、Yasuyuki Nabeshima、Amin 和 Taku Matsuda：“具有初始挠度的网格加固材料的拉出试验（待提交）”日本土木工程师学会关西分会 1995 年学术会议摘要（。 1995)

T.Matsui,K.C.San and D.Leshchinsky: "Geosynthetic reinforced slopes:limit equilibrium and finite element analysises" Soils and Foundations. Vol.34 No.2. 79-85 (1994)

T.Matsui、K.C.San 和 D.Leshchinsky：“土工合成材料加固斜坡：极限平衡和有限元分析”土壤和地基。