基于钻孔图像的孔壁岩体完整性计算及在裂隙岩体灌浆效果评价中的应用

韩增强; 王川婴; 周济芳; 伍宇腾; 胡胜; 汪进超

doi:10.11779/CJGE2016S2040

基于钻孔图像的孔壁岩体完整性计算及在裂隙岩体灌浆效果评价中的应用 English Version

1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉 430071;
2. 雅砻江流域水电开发有限公司,四川成都 610051

详细信息

作者简介:
韩增强（1986- ）,男,助理研究员,主要从事钻孔摄像及岩土工程测试技术方面的研究工作。E-mail: zqhan@whrsm.ac.cn。

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出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Calculation of borehole wall rock integrity based on borehole images and its application in evaluation of grouting effect in fractured rock mass

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;
2. Yalong River Hydropower Development Company, Ltd., Chengdu 610051, China

摘要

摘要: 灌浆是改善裂隙岩体质量最常用的技术手段。针对目前灌浆效果评价依据的单一性,通过钻孔图像中岩体完整性的计算,研究了灌浆前后孔壁岩体完整性指数RMDI的变化以及岩体质量的改善情况。详细描述了钻孔图像中裂隙参数的计算过程,获得了裂隙产状、隙宽等参数,通过图像识别将裂隙的充填特征分为未充填、半充填和完全充填三类。在岩体完整性指数密度函数的基础上,建立了岩体完整性指数的计算公式,并总结了RMDI与岩体完整程度的对应关系。对灌浆前后RMDI的变化进行了统计分析,结果显示通过灌浆处理,孔壁岩体完整程度有明显的改善,灌浆效果明显。最后,对部分典型区段的孔壁图像和透水率结果进行了综合比较,裂隙得到了较好的填充,进一步验证了本次灌浆处理的效果明显。研究结果表明利用钻孔图像以及孔壁完整性指数评价灌浆效果是可行的,弥补了压水试验结果评价依据的单一和局限性。
- 灌浆效果 /
- 岩体完整性 /
- RMDI /
- 钻孔图像 /
- 裂隙岩体
Abstract: Grouting is the most commonly used technique to improve the quality of fractured rock mass. According to the single property of grouting effect evaluation, the change of RMDI of rock mass integrity index before and after grouting is studied based on the calculation of rock mass integrity in borehole images. The calculation of fracture parameters such as occurrence, width in the borehole images is described. The characteristics of the fracture are divided into three types, which are not filling, half filling and filling by image recognition. Based on the exponential density function of the integrity of rock mass, the formula for calculating the integrity index of rock mass is established. The corresponding relationship between RMDI and rock mass integrity is summarized. Statistical analysis is made on the change of RMDI before and after grouting. The results show that the integrity of rock mass has obvious improvement through grouting, and the grouting effect is obvious. Finally, a comprehensive comparison is made on the results of the pore wall images and the water permeability of some typical sections. The fractures are well filled, and it is further verified that the effect of the grouting treatment is obvious. It is feasible to evaluate the grouting effect through borehole images and borehole wall integrity index, which can make up the single property and limitation of the evaluation basis of pressure water test results.
- grouting effect /
- rock mass integrity /
- RMDI /
- borehole image /
- fractured rock mass

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参考文献(12)

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文章访问数: 325
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基于钻孔图像的孔壁岩体完整性计算及在裂隙岩体灌浆效果评价中的应用 English Version

作者简介: 韩增强（1986- ）,男,助理研究员,主要从事钻孔摄像及岩土工程测试技术方面的研究工作。E-mail: zqhan@whrsm.ac.cn。

计量

出版历程

Calculation of borehole wall rock integrity based on borehole images and its application in evaluation of grouting effect in fractured rock mass

计量

出版历程

目录

作者简介:
韩增强（1986- ）,男,助理研究员,主要从事钻孔摄像及岩土工程测试技术方面的研究工作。E-mail: zqhan@whrsm.ac.cn。