一:土工试验þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
a,土的三相组成(固相,液相,气相)þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
土的物理性质指标:þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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1 土的密度 :是指土体单位体积的质量 土的密度变化范围一般在16-22kN/m³þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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2土颗粒比重(或土粒密度)Gs:是指土的固体颗粒的单位体积的质量与水在4oC时单位体积的质量之比þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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土的比重取决于土的矿物成分,其变化范围一般在26.0-27.5之间.þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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3土的含水量w:是指土中水的质量与固体颗粒的质量之比,通常以百分数表示.þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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含水量是表示土湿度的指标.土的天然含水量变化范围很大,从干砂接近于零一直到饱和粘土的百分之几百.þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
4干密度 :是指土的固体颗粒质量与土的总体积之比.þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
土的干密度越大,土越密实.所以干密度常常用作土压实的控制指标.þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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5饱和密度 :是指土空隙中全部被水充满时土的密度.þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
þ£Qº¨5¢qç/bbs.3c3t.com ÂlµóÓ¥ÿÔ
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