A Study on the Earth Pressure Distribution around the Trap Door

活板门周围土压力分布研究

• 批准号: 07650572
• 负责人: TAMURA Takeshi
• 金额: $ 1.34万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650572/
• 关键词: earth pressure; trap door; composite layr; tunnelling; NATM; centrufuge; ground reaction; tunnel supprt; 粘性土; 支保土; ゆるみ土圧; 間隙水圧

(1) The earth pressure distribution around the trap door can be numerically simulated for both of sandy and clayy grounds.(2) In particular, the earth pressure in the case of clayy ground is obtained with a high accuracy.(3) It is clarified that the effect of the dilatancy is important and that the selection of thye flow rule should be made carefully.(4) An experiment as well as the numerical simulation was performed for the composite ground of clay and sand but any clear effect of the double layr ground was not observed due to the high stiffness of clay.(5) From the result of the numerical simulation, it was found that almost no loothed earth pressure was observed when the soft clay layr is deposited under the sand layr.(6) The Terzaghi's formula can not predict clearly the earth pressure for the composite layr.

(1)对于砂质地基和粘性地基，均可数值模拟疏水阀门周围的土压力分布。(2)特别是粘性地基的土压力计算精度较高。(3)阐明了剪切力的影响是重要的，流动规律的选择应慎重。(4)对粘土和砂土复合地基进行了试验和数值模拟，但由于粘土的高刚度，没有观察到双层地基的任何明显影响。(5)从数值模拟的结果来看，结果表明，在砂层下沉积软粘土层时，几乎没有观察到冲刷土压力。(6)太沙基公式不能很好地预测复合层的土压力。

项目成果

田村 武: "動的な効果を考慮した落とし戸土圧について" 第1回都市直下地震災害総合シンポジウム論文集. 149‐150 (1996)

田村武：“关于考虑动力效应的活板门土压力”第一届城市内陆地震灾害综合研讨会论文集149-150（1996）。

Tamura: "A rigid-plastic analysis for granalar materials" Soils and Foundations. 36-3. 113-121 (1996)

Tamura：“颗粒材料的硬塑性分析”土壤和基础。

T. Adachi: "Excavation of Tunnel in Rock with High Pressured Gas" Colloguium “Chalk and Shales". 221-226 (1995)

T. Adachi：“用高压气体在岩石中开挖隧道”座谈会“白垩和页岩”221-226 (1995)。

T. Tamura: "A Rigid-plastic Analysis of Granular Materials" Soils and Foundations. (予定). (1996)

T. Tamura：“颗粒材料的硬塑性分析”土壤和基础（计划）（1996 年）。

田村 武: "軸対称複合地盤における土圧発生メカニズムの解析" 地盤工学研究発表会 講演集. 32(予定). (1997)

田村武：《轴对称复合地基土压力产生机理分析》岩土工程研究报告讲义集32（预定）。