圆锥动力触探试验原理是什么?主要成果及其应用有哪些

2025-04-03 08:05:13
推荐回答(1个)
回答1:

重型动力触探与标贯试验的异同点:
1、两种实验对象不同,圆锥动力触探适用碎石土,标贯粘性土和砂土。
2、二者的测试探头构造不一样;
3、探头不同,一个是管靴状,一个是锥尖状。
4、标准贯入只有一种锤重,即63.5kg的锤,而动力触探分为10kg(轻探)、28kg(中型动力触探)、63.5kg(重型动力触探)、120kg(超重型动力触探)。
5、测试依据或原理完全不同:动力触探是以动能方式,通过实心的锥尖反力推测被测试土的一些性质,而标准贯入试验是以动能方式,使被测试的土进入管靴的方式来测求或衡量被测土的一些性质。
6、动力触探需要进行杆长修正锤击数,这是取决于探头是实心的原因,动能随杆长衰减较快。标准贯入试验一般不需要进行杆长修正锤击数,这是因为一般情况下,它测试的对象是砂类土或其它散粒状的土,如填土,一般情况下,测试时因这类土侧摩擦阻力较小,土塞不太明显。动能衰减较慢,可以被忽略,而针对粘性土(常用它来评价地基承载力)需要进行杆长修正锤击数,这是因为粘性土侧摩擦阻力较大,土塞较明显,容易形成“实体探头”动能衰减较快。
感觉这样的提问没有意义
建议自己下去查查资料

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