Use of fall cone test as measurement of shear strength for soft clay materials
Use of fall cone test as measurement of shear strength for soft clay materials
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DOI：
10.1016/j.sandf.2012.07.002
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发表时间：
2012-08
影响因子：
3.7
通讯作者：
Hiroyuki Tanaka;H. Hirabayashi;T. Matsuoka;H. Kaneko
中科院分区：
文献类型：
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作者：
Hiroyuki Tanaka;H. Hirabayashi;T. Matsuoka;H. Kaneko
一个落锥试验（FCT）进行，以获得不排水剪切强度（SU），并测量敏感性（ST）的完整和重塑样品从几个网站在日本。将FCT值与无侧限抗压强度的一半（qu/2）进行比较，这是日本实际设计中评估suf的标准方法。本文还发现，这种FCT与qu/2无关，也不能直接作为设计值，它也是由现场和实验室叶片试验得到的。对比研究表明，Stby FCT比场导向器的FCT大10倍。不同测试方法测得的St值差异较大，可归因于重塑方法。也就是说，FCT的重塑条件是通过用手在塑料袋中捏合样品来创建的，而在现场叶片中，地面通过叶片叶片的30转来重塑。这表明，由叶片的转动引起的强度降低的程度比由捏合重塑引起的强度降低的程度小。
A fall cone test (FCT) was carried out to obtain the undrained shear strength (su), and to measure the sensitivity (St) of intact and remolded samples from several sites in Japan. The value ofsufrom FCT was compared with half of the unconfined compression strength (qu/2), which is a standard way to evaluatesufor practical design in Japan. It is found thatsufrom FCT is neither related withqu/2 nor used directly as a design value.Stwas also obtained by field and laboratory vane tests. A comparison study revealed thatStby FCT is as much as 10 times larger than that by the field vane. The large difference inStmeasured by different testing methods can be attributed to remolding methods. That is, the remold condition for FCT was created by kneading the sample in a plastic bag by hand, while in the field vane, the ground was remolded by 30 turns of the vane blade. This indicates that the degree of the reduction in strength caused by the turn of the vane blade is less significant than that caused by remolding by kneading.