关于环刀和核子密度仪对比检测研究

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1、关于环刀和核子密度仪对比检测研究【摘要】土料密度检测的准确性和检测所用吋间多少一直是土料填筑中关注最大的,核子密度仪检测时间短、精度高，但由于有些土中所含特殊矿物质影响，造成核子密度仪有时检测与环刀检测结果有一定偏差，使人们对核子密度仪检测的可信度存在致疑，造成核子密度仪在水利施工中的使用较少，其实这可以通过现场标定解决。为更好推广和使用核子密度仪我把自己的一些经验和方法阐述一下。【关键词】核子密度仪深度相关性1•概述在新疆引额济乌平原明渠引水工程的现场填筑检测屮，采用核子密度仪和环刀在相同部位进行检测，把检测数据进行对比分析，以确定两者的差异

2、。2•研究方法在渠道填筑现场进行试验，填筑土料位Tg料场地面下1-2米的混合料。该料天然含水率为6.2~25・11%,天然干密度为1.34~1・60g/cm3o液限平均值24.1%,塑限平均值15.1%,塑性指数平均值9.1,土料粘粒含量平均值为18%,最优含水率平均值14.3%,最大干密度平均值Pd.max=l・82g/CIHo土料铺土厚度35cm,碾压6遍，先采用核子密度仪检测密度、含水率，探头检测深度为30cm,然后再在原位釆用环刀检测密度、含水率，检测深度为23~32cm左右（土层下部三分Z—范围）。3•核子密度仪与环刀检测密度、含水量

3、的试验结果3.1核子检测与环刀取样法密度及含水量汇总表试验编号环刀取样法核子检测湿密度含水量含水率干密度湿密度含水量含水率干密度g/cm3g/cm：'%g/cm?g/cm3g/cm3%g/cm3A12.020.22012.21.802.0250.22312.381.802A22.020.21111.71.812.0130.21311.831.800A32.060.23713.01.822.0610.23212.681.829A42.070.24113.21.832.0710.24813.611.823A52.040.21411.71.832.0

4、450.21811.931.827A62.020.21812.11.802.0340.21111.571.823A71.980.20111.31.781.9860.2(H)11.201.786A82.050.25114.01.8()2.0510.24913.821.802A92.050.23112.71.822.0610.25314.011.808AI02.010.19810.91.812.0180.19210.511.826All2.030.21712.01.812.0460.21911.991.827A122.010.19810.91.81

5、2.0020.19510.791.807A132.000.21011.71.792.0110.22112.351.790A142.010.21111.71.802.0150.22412.511.791A152.030.22012.21.812.0150.22212.391.793A162.010.21211.81.8()2.0120.21()11.651.802A172.050.24113.31.812.0370.24113.441.796A182.000.23413.31.772.00()0.22312.551.777A192.010.231

6、13.01.782.0150.24113.591.774A202.010.19810.91.812.023().19910.911.824A212.020.21511.91.812.0150.22112.321.794A222.010.19510.71.822.0150.21311.821.802A232.060.23112.61.832.0650.24613.521.819A242.050.25914.51.792.0370.25414.231.783A252.080.25413.91.832.0730.24413.371.829A262.0

7、40.24113.41.802.0510.23212.751.819A272.010.18710.31.822.0250.19710.781.828A282.030.21912.11.812.0270.21812.051.809A292.070.23813.01.832.0620.24013.171.822A302.040.23513.01.812.0310.24213.531.789A3I2.010.22112.41.792.0130.22512.581.788A322.060.23713.01.822.0760.23812.951.838A

8、332.050.24313.41.812.0630.24813.661.815A342.050.25214.01.802.0420.26214.721