A study on flow-deformation coupled behavior in an excavation disturbed zone and development of analysis method for the behavior

开挖扰动区流动-变形耦合行为研究及其分析方法的发展

• 批准号: 17560427
• 负责人: YOSHIDA Hidenori
• 金额: $ 2.3万
• 依托单位: Kagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560427/
• 关键词: excavation disturbed zone; formation of flow area; underground nuclear-waste repository; flow-deformation coupled behavior; rock mass; discontinuity; creep behavior

In Japan, it is planned to dispose high-level radioactive waste and TRU waste in a stable rock mass. As for the HLW problems, it is necessary to ensure that residual radioactive substances are kept from reaching the biosphere after many thousands of years. Thus the mathematical model by which not only mechanical but also hydraulic behaviors can be predicted for a long-term is of prime importance. The mechanical and hydraulic properties of discontinuous rock mass have strong correlations respectively. In this study, a static test and a creep test with associated to the coupled behaviors are conducted with the use of an artificial specimen so as to seize the mechanism of the mechanical and hydraulic behaviors. Each test consists two type of specimen, one includes a discontinuity and the other does not have it. All tests are conducted under various confining pressures and various shapes of the discontinuity. Moreover, the numerical analysis by which the coupled behavior in the creep test is reproduced is carried on. Above all, the creep model that takes into account the deformation of discontinuity is proposed. The numerical result has modestly good accordance with the measured data. From the comparison of the experiment and the analysis, the mechanism of coupled behavior is discussed. In results, the proposed analysis model is modestly effective and can be utilized to estimate a long-term behavior of a discontinuous rock mass in an excavation disturbed zone (E.D.Z) around a disposal tunnel for nuclear wastes.

在日本，计划将高放射性废物和 TRU 废物处置在稳定的岩体中。对于高放废物问题，有必要确保残留的放射性物质在数千年后不进入生物圈。因此，不仅可以长期预测机械行为，还可以预测液压行为的数学模型至关重要。不连续岩体的力学性质和水力性质分别具有很强的相关性。在本研究中，使用人工样本进行与耦合行为相关的静态测试和蠕变测试，以抓住机械和液压行为的机制。每个测试都包含两种类型的样本，一种包含不连续性，另一种不包含不连续性。所有测试都是在各种围压和各种形状的不连续性下进行的。此外，还进行了再现蠕变试验中的耦合行为的数值分析。首先，提出了考虑不连续变形的蠕变模型。数值结果与实测数据具有较好的一致性。通过实验比较和分析，讨论了耦合行为的机理。结果表明，所提出的分析模型相当有效，可用于估计核废料处置隧道周围开挖扰动区 (E.D.Z) 中不连续岩体的长期行为。

项目成果

Micromechanics-based continuum model for a jointed rock mass and excavation analysis of Shiobara powerhouse

基于微观力学的节理岩体连续体模型及盐原电厂开挖分析

• 发表时间: 2005
• 期刊: International Journal of the Japanese Committee for Rock Mechanics Vol. 1・No. 1
• 作者: Yoshida;H.;Horii;H.
• 通讯作者: H.

不連続面の寸法とロックボルト導入効果に関する一考察

不连续面尺寸及锚杆引入效果研究

• 发表时间: 2005
• 期刊: 応用力学論文集 Vol. 8
• 作者: 吉田秀典;宇田圭一;平川芳明;森聡
• 通讯作者: 森聡

A Creep Test for Material with Discontinuity and Numerical Analysis

不连续材料的蠕变试验及数值分析

• 发表时间: 2006
• 期刊: Journal of Applied Mechanics JSCE Vol.9
• 作者: Hidenori YOSHIDA;Hajime SHIRAGA;Junya INOUE;Takahiro HIDESHIMA;Kensei KANAYA;Takao KAMACHI;Yoshiaki HIRAKAWA;Satoshi MORI
• 通讯作者: Satoshi MORI

Investigation on Collapse Mechanism of Super-Deep Vertical Shaft and its Causes

超深立井倒塌机理及原因研究

• 发表时间: 2006
• 期刊: JSCE Journal of Construction Engineering and Management Vol.62・No.4
• 作者: Shunsuke SAKURAI;Norikazu SHIMIZU;Shin-ichi AKUTAGAWA;Hidenori YOSHIDA;Toshinori SATO;Hiroshi YAMACHI
• 通讯作者: Hiroshi YAMACHI

不連続面の幾何学的特性がクリープ挙動に及ぼす影響に関する検討

不连续表面几何特性对蠕变行为的影响研究

• 发表时间: 2005
• 期刊: 計算数理工学論文集 Vol.5・No. 2
• 作者: 吉田秀典;山崎卓哉;井上純哉
• 通讯作者: 井上純哉