Boundary friction mechanism of reinforced soil and reasonable design method of reinforced cut slope
| Project/Area Number |
05650465
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geotechnical engineering
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| Research Institution | Osaka University |
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Principal Investigator |
MATSUI Tamotsu Osaka Univ., Faculty of Eng., Professor, 工学部, 教授 (20029143)
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| Co-Investigator(Kenkyū-buntansha) |
NABESHIMA Yasuyuki Osaka Univ., Faculty of Eng., Research Associate, 工学部, 助手 (40263214)
辛 嘉靖 大阪大学, 工学部, 助手 (60226082)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | 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 |
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| Research Abstract |
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.
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Report
(3 results)
Research Products
(9 results)
