CAJ | 학술논문

为获得某堤坝地基下含细粒土砂的力学特性，进行了平面应变试验，并与常规三轴得到的结果进行了对比，结果显示：对于同样围压平面应变试验的偏差应力及广义剪应力大于常规三轴压缩试验，说明平面应变状态下含细粒土砂的强度较高；在相同的大主应变下，平面应变试验的广义剪应变最大值远大于常规三轴试验；同时，也可以看出平面应变试验下，小主应变反映的侧向膨胀更大，而体积应变远小于常规三轴试验。由此说明，应力状态对含细粒土砂的力学特性有重要的影响，应依据工程中实际的受力状态选择相应的试验方法来确定其力学特性。
위획득모제패지기하함세립토사적역학특성，진행료평면응변시험，병여상규삼축득도적결과진행료대비，결과현시：대우동양위압평면응변시험적편차응력급엄의전응력대우상규삼축압축시험，설명평면응변상태하함세립토사적강도교고；재상동적대주응변하，평면응변시험적엄의전응변최대치원대우상규삼축시험；동시，야가이간출평면응변시험하，소주응변반영적측향팽창경대，이체적응변원소우상규삼축시험。유차설명，응력상태대함세립토사적역학특성유중요적영향，응의거공정중실제적수력상태선택상응적시험방법래학정기역학특성。
In order to understand the mechanical characteristics of the fine-grained sand under an embankment ,the plane strain test and the triaxial test were performed and the results were compared .The comparison results showed that with the same confining pressure , the principal stress difference and generalized shear stress of fine-grained sand by plane strain test were greater than those by triaxial test ,i .e .the strength under the condition of plane strain was larger .Also , it revealed that at the same major main strain ,the maximum value of the generalized shear strain in plane strain test was far greater than that in triaxial test .Compared with the results of triaxial test ,the lateral dilatation of minor main stress was greater ,while the volume strain was much smaller in plane strain test .These fidings indicate that the stress state has great influence on the mechanical characteristics of the fine-grained sand ,and that the mechanical characteristics should be determined by the testing method according to the practical stress state in the engineering .