摘要
本文在论证了径压法测定冻土抗拉强度具有良好规律的基础上，进一步探讨试样长度对测定结果的影响问题以及计算方法的修正问题。长度为２５－１３０ｍｍ的７种试样在不同温度和机速下的试验结果表明，试样长度对径向压裂法的测定结果无实质的影响。在通常范围内，试样的长径比问题可以不予考虑。在同样温度和机速下，径向压裂法的测定值比直接拉伸法的抗拉强度小得多；但在不同温度和机速下，两种结果的比例相当接近，可用统一比例系数Ｋ对径压法强度进行修正，使之符合直拉法指标，达到可比要求，供实际应用。
The effect of length of specimen on the results in radial splitting test and the correc-tion for computing expression are discussed on the basis of fine test results in this paper.Speciments with seven lengths ranged from 25 to 130 mm are tested under various tem-perature and machine speed（displacement rate controlled by machine）．Test results showthat the length of specimen has no substantial effect on detewnined results with radialsplitting method．In the range of slenderness ratio of0．4－2．1， there is little effect on theresults．The strength value determined with radial splitting method is less than that underuniaxial extension，but the ratio between the two is nearly a constant under various tem-perature and machine speed．The results in radial splitting test can be corrected with aconstant K in agreement with the strengths determined under uniaxial extension，so thatthe method is useful in practice.
出处
《冰川冻土》
CSCD
北大核心
1994年第4期327-332,共6页
Journal of Glaciology and Geocryology
关键词
径向压裂法
抗拉强度
试样长径比
冻土
：radial splitting method，tensile strength，strength of frozen soil，slenderness ratio of specimen
