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1#
                                                                                            1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
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。1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(已知:量力环校正系数C=200N/0.01mm,贯入杆直径d=50mm1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
荷载测力计百分表读数R1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
单位压力P(KPa)1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
百分表读数(0.01mm1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
贯入量Lmm1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
0.91 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(92)1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
60.51 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(0.61)
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1.81 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(183)1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
106.51 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(1.07)
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
2.91 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1511 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
4.01 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1941 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
4.81 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
240.51 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
5.11 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
2861 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
解:根据贯入杆的单位压力计算公式1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
P=C*R/A
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
P=200X0.9/1963=0.092 1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
MPa1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
0.092X1000=9
KPa1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
P=200X1.8/1963=0.183 MPa1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
0.183X1000=183 (MPa)
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(
其中 A=1/4Πd21 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
=1/4X3.14X502 =1963
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
请问,贯入量是如何计算的?1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
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1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
σ (KPa)1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1001 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
2001 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
3001 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
τ( KPa)1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1001 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1081 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1151 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
:1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
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+C1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(2)
作图如下:1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
3tgΦ=15%200=0.0751 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
Φ=4.3
o1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
C=100-100tg
Φ1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
C=92.5(KPa)1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
请问我这样做是正确的吗?那么1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
(3)中的tgΦ=15%200中的15和200是怎样确定的?1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
C=100-100tg
Φ中的两个100是怎样确定的?1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
1 +_šJ"u_Ábbs.3c3t.com´0ûpŽ*™¼D
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