金沙江中游某坝基软岩的崩解特性试验研究

邹浩; 韩爱果

doi:10.3969/j.issn.1001-5485.2013.04.011

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raybet体育在线院报 ›› 2013, Vol. 30 ›› Issue (4) : 48-51. DOI: 10.3969/j.issn.1001-5485.2013.04.011

岩土工程

金沙江中游某坝基软岩的崩解特性试验研究

邹浩,韩爱果

作者信息 +

Disintegration Characteristics of Soft Rock of a Dam Foundation in Middle Jinsha River

ZOU Hao, HAN Ai-guo

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文章历史 +

摘要

针对软岩遇水易崩解、软化等特点,以金沙江中游某坝基软岩为例,选取右岸坝基具有代表性的8块泥质粉砂岩岩样,将每块岩样切割成3部分,分别进行干燥单轴抗压强度试验、室内干湿循环崩解和室外自然条件崩解试验。通过拍照和跟踪观察,记录岩样的初崩时间,并进行试验全过程崩解现象的描述,据此,定性地将崩解性由强到弱划分为完全崩解、中等程度崩解、不崩解3个等级。试验结束时,可直观地观察到室内和室外2种条件下岩样的最终崩解对比情况。之后,对室内浸水崩解试验结束后的岩样进行黏粒含量的测定。试验结果表明：干湿循环条件下岩样的崩解要比自然条件下彻底；所取岩样的初崩时间顺序、最终崩解情况与干燥单轴抗压强度、黏粒含量存在较好的相关性。由于软岩的不良物理现象,特别是其崩解性,将不同程度地增加工程施工的难度,对软岩崩解特性的研究,具有实际的工程意义。

Abstract

Soft rock is easily disintegrated and softened in the presence of water. Taking the soft rock of a dam foundation in middle Jinsha river as a research object, we selected 8 typical rock samples (argillaceous siltstone) from the dam foundation in the right bank and cut each sample into 3 parts to carry out dry uniaxial compressive test, indoor dry-wet cycle disintegration test, and outdoor natural disintegration test respectively on each part. By recording the initial disintegration time and describing the whole disintegration process, we quantitatively divided the disintegration into three levels completely disintegrated, moderately disintegrated, and not disintegrated. Moreover, we compared the final state of disintegration of the rock samples under dry-wet cycling condition and natural condition. Subsequently, we measured the viscous granule content in the rock samples after wet disintegration. Test results showed that rock samples in dry-wet cycling condition disintegrated more thoroughly than those in natural conditions. The initial time and final state of disintegration are well correlated with the dry uniaxial compressive strength and viscous granule content.

导出引用

邹浩,韩爱果. 金沙江中游某坝基软岩的崩解特性试验研究[J]. raybet体育在线院报. 2013, 30(4): 48-51 https://doi.org/10.3969/j.issn.1001-5485.2013.04.011

ZOU Hao, HAN Ai-guo. Disintegration Characteristics of Soft Rock of a Dam Foundation in Middle Jinsha River[J]. Journal of Changjiang River Scientific Research Institute. 2013, 30(4): 48-51 https://doi.org/10.3969/j.issn.1001-5485.2013.04.011

中图分类号： P642.2

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