EFFECT OF PENETRATION RATE ON STRENGTH OF REMOLDED CLAY AND SAND SAMPLES
EFFECT OF PENETRATION RATE ON STRENGTH OF REMOLDED CLAY AND SAND SAMPLES
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DOI：
10.1139/t75-038
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发表时间：
1975-01-01
影响因子：
3.6
通讯作者：
ALLEN, JH
中科院分区：
文献类型：
--
作者：
DAYAL, U;ALLEN, JH
通过不同速度（2.662f.p.s）下的等速贯入试验，研究了贯入速度对粘土和砂土强度的影响。 （81.14 cm/s）。 粘土和砂目标具有不同的强度和含水量。试验结果表明，对于颗粒土，贯入速度对锥套摩擦阻力的影响不明显，而对于粘性土，贯入速度的增加会导致锥套摩擦阻力的增加。结果表明，对于粘性土，动静强度比与贯入速度比的对数成正比。这种关系的比例常数定义为土壤粘性系数取决于土壤的物理性质和土壤强度，其值随着土壤强度的降低而增加。对于试验土，提出了不同强度范围的土粘滞系数值。的分析关系的有效性建立的渗透速度范围从0.0044 f. p. s。 (0.13 cm/s）至18 f.p.s. (550 cm/s）。
The penetration rate effect on the strength of clay and sand was studied by constant velocity penetration tests performed with various velocities up to 2.662 f.p.s. (81.14 cm/s). The clay and sand targets were of various strengths and moisture contents. The construction of the penetrometer is similar to that used in static tests, and in each test the cone resistance, sleeve friction, and penetration velocity were recorded.Experimental results indicated that for granular soils the effects of penetration velocity on cone and sleeve friction resistances are insignificant, whereas, for cohesive soils, the increase in penetration velocity causes an increase in the cone and friction resistances. It is found that for the cohesive soils the ratio of dynamic to static strength is directly proportional to the logarithm of the penetration velocity ratio. The proportionality constant of this relationship defined as soil viscosity coefficient depends on the physical properties of the soil and the soil strength and its value increases as the strength of the soil decreases. For the tested soils various values of the soil viscosity coefficient are proposed for different strength ranges. The validity of the analytical relationship is established for penetration velocities ranging from 0.0044 f.p.s. (0.13 cm/s) to 18 f.p.s. (550 cm/s).