人民黄河
人民黃河
인민황하
Yellow River
2014年
3期
76-79
,共4页
岩体变形特性%弹性模量%变形模量%刚性承压板%南水北调西线工程
巖體變形特性%彈性模量%變形模量%剛性承壓闆%南水北調西線工程
암체변형특성%탄성모량%변형모량%강성승압판%남수북조서선공정
deformation characteristics of rock mass%elastic modulus%deformation modulus%rigid pressure-bearing plate%west route of South-to-North Water Transfer Project
为准确获取南水北调西线工程坝址区岩体变形指标，采用刚性承压板法，在阿达坝址、仁达坝址和阿安坝址平硐中开展了岩体变形现场试验。结果表明：3个坝址区岩体变形模量、弹性模量受岩性组成影响明显；压力-变形关系曲线类型大部分为近似直线型或下凹型，这与岩体受节理裂隙切割情况、加载方向以及岩体完整度等密切相关；加载方向和应力水平对岩体变形特性产生一定影响，变形模量随应力的增大总体呈逐渐增大趋势，弹性模量与应力水平的关系受加载方向影响，随应力变化的规律不明显；现场岩体变形测试结果与地震波速测试结果、规范建议值的对比分析表明，坝址区岩体总体为Ⅴ类，三者之间具有较好的对应性，现场岩体变形试验参数测试结果是可靠的。
為準確穫取南水北調西線工程壩阯區巖體變形指標，採用剛性承壓闆法，在阿達壩阯、仁達壩阯和阿安壩阯平硐中開展瞭巖體變形現場試驗。結果錶明：3箇壩阯區巖體變形模量、彈性模量受巖性組成影響明顯；壓力-變形關繫麯線類型大部分為近似直線型或下凹型，這與巖體受節理裂隙切割情況、加載方嚮以及巖體完整度等密切相關；加載方嚮和應力水平對巖體變形特性產生一定影響，變形模量隨應力的增大總體呈逐漸增大趨勢，彈性模量與應力水平的關繫受加載方嚮影響，隨應力變化的規律不明顯；現場巖體變形測試結果與地震波速測試結果、規範建議值的對比分析錶明，壩阯區巖體總體為Ⅴ類，三者之間具有較好的對應性，現場巖體變形試驗參數測試結果是可靠的。
위준학획취남수북조서선공정패지구암체변형지표，채용강성승압판법，재아체패지、인체패지화아안패지평동중개전료암체변형현장시험。결과표명：3개패지구암체변형모량、탄성모량수암성조성영향명현；압력-변형관계곡선류형대부분위근사직선형혹하요형，저여암체수절리렬극절할정황、가재방향이급암체완정도등밀절상관；가재방향화응력수평대암체변형특성산생일정영향，변형모량수응력적증대총체정축점증대추세，탄성모량여응력수평적관계수가재방향영향，수응력변화적규률불명현；현장암체변형측시결과여지진파속측시결과、규범건의치적대비분석표명，패지구암체총체위Ⅴ류，삼자지간구유교호적대응성，현장암체변형시험삼수측시결과시가고적。
In-situ deformation test was carried out at the adits in Ada,Renda and Aan dam sites by the rigid pressure-bearing plate method,in or-der to obtain the deformation index of rock mass accurately. The results show that the elastic modulus and deformation modulus of rock mass at three dam sites are obviously influenced by lithology. The types of pressure and deformation curves are mostly lines or down concaves,which are correla-tive with joints,loading direction and integrity of rock mass and so on closely. The influences of loading direction and stress level on the deforma-tion characteristics of rock mass are analyzed. The deformation modulus increases with stress as a whole. Influenced by loading direction,the change law of elastic modulus with stress is not obvious. Contrasted analysis show that there are good correlativity among in-situ test results of de-formation characteristics of rock mass and seismic velocity results and proposed values given by specifications. The rock mass at the dam sites are classⅤ,and the in-situ test results of deformation characteristics of rock mass are credible and effective.
