MONITORING SYSTEMS AND PREVENTION TECHNOLOGIES FOR DEEP UNDERGROUND ENVIRONMENT

深层地下环境监测系统及防护技术

基本信息

批准号：
12305068
负责人：
SAITO Toshiaki
金额：
$ 23.46万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

In this project, several pieces of research were conducted to the problem of underground environment, and the following results were obtained. First, in order to estimate the behavior of a deep underground structure, propagation properties of P wave which transmits through a rock fracture were investigated, and it was cleared that the RMS amplitude of the P wave are directly proportional to the contact area of the rock fracture and this relation is useful to estimate the shear process of a rock fracture. Moreover, an automatic AE measurement system was developed and the surrounding rock mass behavior was evaluated at the construction site of an underground power station. Second, in order to develop a monitoring system for the underground environment, geostatistics was applied to evaluate the distribution of groundwater level around a dam site and the rock properties beyond a tunnel face at a tunnel construction site using a TBM, and it was concluded that geostatistics approach is very … More useful for such the evaluation. Moreover, a precise measurement of ultrasonic propagation using a laser Doppler vibrometer was carried out as a fundamental research for the Inspection by Reyleigh wave and the nondestructive inspection by ultrasonic wave, and correct ultrasonic velocity-dispersion curves were obtained. The applicability of the velocity-dispersion curve was also discussed. Furthermore, precise geophysical investigation technologies using resistivity, elastic wave, very precise tilt-meter, etc. were developed, and they were applied to the investigation of fractured underground structure. Third, in order to develop a technology which makes a toxic substance harmless and prevents the toxic substance diffusing/permeating, the deviation from the cube law of fracture permeability which governs the migration of substances in underground was investigated. Moreover, relating to geological disposal of high-level-radioactive-wastes, a numerical analysis for the groundwater flow under the coast seabed was performed and the movement of the boundary between fresh water and salt water was clarified. Furthermore, a numerical analysis method was proposed for the process of electrokinetic soil remediation to the argillaceous foundation polluted with heavy metal, and the promotion effect of the remediation with the hydraulic gradient was clarified. On the other hand, the effect of dynamic grouting method to a low permeable rock mass was discussed theoretically, and a rational method to apply this method was proposed. Less

在该项目中，针对地下环境问题进行了多项研究，并获得了以下成果：首先，为了估计地下深层结构的行为，研究了通过岩石裂缝传播的纵波的传播特性。研究表明，P波的均方根振幅与岩石裂隙的接触面积成正比，这种关系对于估计岩石裂隙的剪切过程很有用。此外，还建立了自动声发射测量系统。开发并在施工现场评估围岩体性能其次，为了开发地下环境监测系统，利用地质统计学利用 TBM 来评估坝址周围地下水位的分布以及隧道施工现场隧道掌子面以外的岩石特性。，并得出结论，地质统计学方法对于此类评估非常有用。此外，使用激光多普勒振动计进行超声波传播的精确测量，作为瑞利波检测和无损检测的基础研究。还讨论了速度色散曲线的适用性，并开发了使用电阻率、弹性波、超精密倾斜仪等的精密地球物理勘探技术。第三，为了开发一种使有毒物质无害并防止有毒物质扩散/渗透的技术，偏离了控制裂缝渗透率的立方定律。此外，还对高放射性废物的地质处置进行了地下物质迁移的研究，对海岸海底下的地下水流进行了数值分析，明确了淡水和咸水之间的边界运动。进一步提出了重金属污染泥质地基动电修复过程的数值分析方法，明确了水力梯度对修复的促进作用。对低渗透岩体注浆方法进行了理论探讨，并提出了该方法的合理应用方法。