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                                                                                            ©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
2下列表格中的数据为做CBR试验十所测得的结果,请将所需数据填在表格空白处,并计算CBR2.5CBR5P判断该试验是否重做。©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(已知:量力环校正系数C=200N/0.01mm,贯入杆直径d=50mm©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
荷载测力计百分表读数R©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
单位压力P(KPa)©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
百分表读数(0.01mm©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
贯入量Lmm©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
0.9©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(92)©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
60.5©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(0.61)
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
1.8©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(183)©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
106.5©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(1.07)
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
2.9©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
151©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
4.0©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
194©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
4.8©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
240.5©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
5.1©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
286©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
解:根据贯入杆的单位压力计算公式©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
P=C*R/A
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
P=200X0.9/1963=0.092 ©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
MPa©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
0.092X1000=9
KPa©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
P=200X1.8/1963=0.183 MPa©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
0.183X1000=183 (MPa)
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(
其中 A=1/4Πd2©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
=1/4X3.14X502 =1963
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
请问,贯入量是如何计算的?©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
1 某工地地基原状土直剪试验(快剪)结果如下表,试求该地基的强度指标©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
σ (KPa)©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
100©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
200©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
300©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
τ( KPa)©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
100©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
108©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
115©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
:©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
1)直剪试验在直角坐标σ~τ关系图是线性的,表达式是τ =σtgΦ+C©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(2)
作图如下:©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
3tgΦ=15%200=0.075©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
Φ=4.3
o©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
C=100-100tg
Φ©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
C=92.5(KPa)©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
请问我这样做是正确的吗?那么©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
(3)中的tgΦ=15%200中的15和200是怎样确定的?©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
C=100-100tg
Φ中的两个100是怎样确定的?©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
©=Ô'J?öO'bbs.3c3t.com­ºÍÙc‘¸CŽ
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