核电厂取排水工程软岩水理特性试验研究
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摘要
基于软岩遇水易崩解、软化并产生变形的特征,利用核电厂取排水工程中的泥岩和泥质砂岩两种软岩芯样,进行耐崩解性试验、膨胀性试验及单轴抗压强度试验,分析软岩在不同含水率条件下的膨胀性、耐崩解性和软化性。结果表明:泥岩的轴向膨胀率及膨胀压力随着含水率增大而线性减小;软岩的耐崩解指数主要分布在30%～60%之间,属低耐久性;软岩遇水表现出明显的软化现象,强度显著下降。试验规律对该工程建设具有一定的参考价值。
To ensure quality and safety,it is necessary to study the hydraulic features of soft rock. The hydraulic features of representative soft rock were studied by using the soft rock obtained in the water intake and outlet project of a nuclear power plant,conducting the slake durability test,the swelling test and the uniaxial compressive strength test.The experiment results show that the axial swelling rate of mudstone decreases linearly with increasing water content.The swelling pressure of mudstone decreases linearly with the increase of water content. The slake durability index of soft rock is mainly distributed between 30% and 60%,which belongs to low durability. Soft rock shows obvious softening phenomenon with water,and the strength decreases significantly. The test law has certain reference value for the project construction.
To ensure quality and safety,it is necessary to study the hydraulic features of soft rock. The hydraulic features of representative soft rock were studied by using the soft rock obtained in the water intake and outlet project of a nuclear power plant,conducting the slake durability test,the swelling test and the uniaxial compressive strength test.The experiment results show that the axial swelling rate of mudstone decreases linearly with increasing water content.The swelling pressure of mudstone decreases linearly with the increase of water content. The slake durability index of soft rock is mainly distributed between 30% and 60%,which belongs to low durability. Soft rock shows obvious softening phenomenon with water,and the strength decreases significantly. The test law has certain reference value for the project construction.
引文
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[2]BEKAR D,ACAR E,OZER F,et al.Robust springback optimization of a dual phase steel seven-flange die assembly[J].Structural&Multidisciplinary Optimization,2012,46(3):425-444.
[3]黄生文,王其海,郭冲,等.红层软岩的压缩变形与弱面剪切试验[J].长沙理工大学学报(自然科学版),2011,8(2):21-27.
[4]邱恩喜,谢强,赵文,等.红层软岩边坡岩体工程特性研究[J].地质与勘探,2007(5):96-100.
[5]中华人民共和国国家标准编写组.工程岩体试验方法标准:GB/T 50266-2013[S].北京:中国计划出版社,2013.
[6]傅学敏,潘清莲.软岩的膨胀规律和膨胀机理[J].煤炭学报,1990(2):31-38.
[7]毕忠伟,张志军.岩石的崩解特性与抗压强度的试验研究[J].有色金属,2011,63(2):233-235.
[8]赵明华,邓觐宇,曹文贵,等.红砂岩崩解特性及其路堤填筑技术研究[J].中国公路学报,2003,16(3):1-5.
[9]周怡,彭振斌,陈安,等.潭衡西高速公路第三系粉砂质泥岩崩解特性研究[J].湖南科技大学学报(自然科学版),2009,24(4):52-55.
[10]张雯,曹平,张向阳,等.金川矿区岩石的膨胀和软化特性试验及分析[J].中南大学学报(自然科学版),2010,41(5):1913-1917.
[11]周翠英,邓毅梅,谭祥韶,等.饱水软岩力学性质软化的试验研究与应用[J].岩石力学与工程学报,2005,24(1):33-38.
[12]刘长武,陆士良.泥岩遇水崩解软化机理的研究[J].岩土力学,2000,21(1):28-31.