堆石料动永久变形特性试验研究
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摘要
合理反映堆石料的动力永久变形特性对于认识土石坝的地震永久变形特性以及推动土石坝抗震水平的提高具有重要意义,本文通过大量室内动力三轴试验,研究了堆石料在不同围压、固结应力和动应力条件下的动永久变形特性,试验结果表明,围压、固结应力以及动应力的大小对堆石料的动永久变形具有重要影响,随围压、固结应力以及动应力的增大,堆石料的动永久变形相应增大。基于上述试验结果,本文研究总结出反映堆石料动永久变形特性的经验公式,通过不同岩性堆石料的对比试验表明,该经验公式具有较好的适用性。
The research on the dynamic permanent deformation properties of rockfill material helps to better understand the dynamic permanent deformation of earth-rock dam induced by earthquake,which in turn improves the aseismic level of earth-rock dam construction. The dynamic permanent deformation properties of rockfill material under different conditions of confining pressure,consolidation stress and dynamic stress are investigated using dynamic triaxial tests in the laboratory. The test results indicate that different loadings conditions have significant influences on the dynamic permanent deformation of rockfill material. The permanent deformation increases with the enlargement in confining pressure,consolidation stress and dynamic stress. Based on our test results,a theoretical formula is proposed for the computation of dynamic permanent deformation of rockfill material,and the given formula is validated using rockfill materials with different lithological characters.
The research on the dynamic permanent deformation properties of rockfill material helps to better understand the dynamic permanent deformation of earth-rock dam induced by earthquake,which in turn improves the aseismic level of earth-rock dam construction. The dynamic permanent deformation properties of rockfill material under different conditions of confining pressure,consolidation stress and dynamic stress are investigated using dynamic triaxial tests in the laboratory. The test results indicate that different loadings conditions have significant influences on the dynamic permanent deformation of rockfill material. The permanent deformation increases with the enlargement in confining pressure,consolidation stress and dynamic stress. Based on our test results,a theoretical formula is proposed for the computation of dynamic permanent deformation of rockfill material,and the given formula is validated using rockfill materials with different lithological characters.
引文
[1]王昆耀,常亚屏,陈宁,往返荷载下粗粒土的残余变形特性[J].土木工程学报,2000,33(3):48-53.
[2]陈生水,沈珠江.堆石坝的地震永久变形分析[J].水利水运科学研究,1990,9(3):277-286.
[3]Eiichi Taniguchi,Robert V.Whitman and W.Allen Marr.Prediction of earthquake-induced deformation of earth dams[J].Soils and Foundations,1983,23(4):126-132.
[4]孔宪京,韩国城等,高土石坝坝料及地基土动力工程性质研究:粗粒料动应力~应变关系试验研究[R].‘八五’国家科技攻关85-208-02-04-1-08项目报告,大连理工大学土木工程系,1994,9.
[5]汪闻韶,金崇磐,王克成,土石坝的抗震计算和模型实验及原型观测[J].水利学报,1987(12).
[6]贾革续,孔宪京,粗粒土动残余变形特性的试验研究[J].岩土工程学报,2004,26(1):26-30.
[7]张克绪,李明宰,常向前,地震引起的土坝永久变形分析[J].地震工程与工程振动,1989:9(1):91-100.
[8]孟凡伟,沈珠江残余变形模型的改进及其应用研究[D].大连理工大学硕士学位论文,2007.
[9]沈珠江,徐刚,堆石料的动力变形特性[J].水利水运科学研究,1996,6(2):143-150.
[10](SL237-1999)土工试验规程[S].北京:中国水利水电出版社,1999.
[2]陈生水,沈珠江.堆石坝的地震永久变形分析[J].水利水运科学研究,1990,9(3):277-286.
[3]Eiichi Taniguchi,Robert V.Whitman and W.Allen Marr.Prediction of earthquake-induced deformation of earth dams[J].Soils and Foundations,1983,23(4):126-132.
[4]孔宪京,韩国城等,高土石坝坝料及地基土动力工程性质研究:粗粒料动应力~应变关系试验研究[R].‘八五’国家科技攻关85-208-02-04-1-08项目报告,大连理工大学土木工程系,1994,9.
[5]汪闻韶,金崇磐,王克成,土石坝的抗震计算和模型实验及原型观测[J].水利学报,1987(12).
[6]贾革续,孔宪京,粗粒土动残余变形特性的试验研究[J].岩土工程学报,2004,26(1):26-30.
[7]张克绪,李明宰,常向前,地震引起的土坝永久变形分析[J].地震工程与工程振动,1989:9(1):91-100.
[8]孟凡伟,沈珠江残余变形模型的改进及其应用研究[D].大连理工大学硕士学位论文,2007.
[9]沈珠江,徐刚,堆石料的动力变形特性[J].水利水运科学研究,1996,6(2):143-150.
[10](SL237-1999)土工试验规程[S].北京:中国水利水电出版社,1999.
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