Research of the behavior for buried flexible outlet conduit under the earth dam

土坝下埋地柔性出水管性能研究

• 批准号: 14360143
• 负责人: KAWABATA Toshinori
• 金额: $ 9.66万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14360143/
• 关键词: Geotechnical Engineering; Underground Structure; Model Tests; Earth Pressure; Settlement; Irrigation Pond; Numerical Analysis

The behavior of buried flexible pipe is influenced to a considerable extent by the properties of the backfill materials. Recently, geosynthetics are commonly used in retaining wall for reinforcement. And flexible pipe is used for drainage in such embankment.However, the behavior of buried flexible pipe in the retaining wall reinforced by geosynthetics is not clear.Experiments using a middle-sized steel test pit were carried out to examine the behavior of a flexible pipe buried in a reinforced embankment with settlement. A bi-axial load cell was developed in order to accurately measure the load acting on the buried pipe, and a model pipe, which was equipped with 20 such load cells was made.The result showed that with settlement of the pipe, the arching action of the backfill progress, and the vertical load that acts on the pipe greatly decreases.In addition, it was found that when backfill with sand and geogrid was used, the vertical load act on the pipe was distributed by the geogrid, hence decreasing by approximately 25% the overburden load.In the future, it is necessary to examine the effects of the installed position of the geogrid and number of layers of the geogrid.

埋地软管的性能在很大程度上受到回填材料性能的影响。近年来，土工合成材料普遍用于挡土墙的加固。此类路堤均采用柔性管进行排水。然而，埋地柔性管在土工合成材料加筋挡土墙中的性能尚不明确。通过中型钢试坑试验，研究了埋地柔性管在有沉降的加筋路堤中的性能。为了准确测量作用在埋地管道上的荷载，研制了双轴测力传感器，并制作了装有20个这种测力传感器的模型管道。结果表明，随着管道的沉降，回填土的拱起作用，作用在管道上的竖向荷载大大减小。此外，发现当使用沙子和土工格栅回填时，作用在管道上的竖向荷载由土工格栅分散， 从而减少了约25%的覆盖荷载。今后有必要考察土工格栅安装位置和土工格栅层数的影响。

项目成果

Lateral Loading Tests for Buried Pipe with Geosynthetics

土工合成材料埋管横向荷载试验

• 发表时间: 2004
• 期刊: Proceedings of GeoTrans, ASCE, LA, USA Vol.1
• 作者: Toshinori;Kawabata
• 通讯作者: Kawabata

Distribution of Traffic Loads for Shallowly Buried Pipe by D.E.M. Analyses

D.E.M. 浅埋管道交通荷载分布

• 期刊: Proceedings of Pipeline 2004 (ASCE SanDiego, USA) CD Dir 9B
• 作者: Kawabata;T.;Ariyoshi;M.;Uchida;K.;Ling;H.I.;Nakase;H.;Sawada;Y.;Mohri;Y.
• 通讯作者: Y.

D.E.M.Analyses on Behavior of Shallowly Buried Pipe Subject to Traffic Loads

浅埋管道在交通荷载作用下的 D.E.M. 分析

• 发表时间: 2003
• 期刊: New Pipeline Technologies, Security, and Safety, ASCE Vol.2
• 作者: Toshinori;Kawabata
• 通讯作者: Kawabata

Uplift Mechanism of Underground Structures in Dry Sand Subjected to Cyclic Simple Shear by DEM

DEM 循环简剪作用下干砂中地下结构的抬升机制

• 发表时间: 2005
• 期刊: Proceedings of 15th International Offshore and Polar Engineering Conference, ISOPE2005 (CD-ROM)
• 作者: Kawabata;T.;Uchida;K.;Ooishi;J.;Nakase;H
• 通讯作者: H

Distribution of Traffic Loads for Shallowly Buried Pipe by D.E.M.Analyses

D.E.M.分析浅埋管道交通荷载分布

• 发表时间: 2004
• 期刊: Proceedings of Pipeline 2004, ASCE, SanDiego, USA CD Dir.9B
• 作者: Toshinori;Kawabata
• 通讯作者: Kawabata