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YXDZ-3型岩石点荷载仪

岩石点荷载仪用于现场/室内确定岩石的强度。采用便携式轻巧型结构,利于现场试验。同时该机上部采用精密导向装置。保证试验时上下压头无偏移。加载采用油压千斤顶。数字显示。本机还采用交直流两用。

  • 型号:YXDZ-3型

  • 产品参数
  • 型号:YXDZ-3型

 


 

一,岩石点荷载仪产品简介:
岩石点荷载仪用于现场/室内确定岩石的强度。采用便携式轻巧型结构,利于现场试验。同时该机上部采用精密导向装置。保证试验时上下压头无偏移。加载采用油压千斤顶。数字显示。本机还采用交直流两用。在没有220V的现场本机自身带有12V直流电。在保证冲电4小时以上的情况下,本机能连续工作12小时。
 the product introduction:
Rock point loaders are used to determine the strength of the rock in the field/indoor. The portable lightweight structure facilitates field trials. At the same time, the upper part of the machine adopts precision guiding device. Ensure that there is no offset between the upper and lower indenters during the test. Loaded with a hydraulic jack. Digital Display. This machine also uses AC and DC. In the absence of 220V, the unit itself has 12V DC. The machine can work continuously for 12 hours while ensuring more than 4 hours of power-on.

二,岩石点荷载仪技术参数:
1、千斤顶大工作压力:100Mpa
2、大试样高度120
3、力传感器大量程:100KN
4、用了高精度压力变送器。精度达到0。001KN.
5、内置铅蓄电池可满足野外连续工作超过12小时
6、试样高度。120mm
7、电源:交流220V±10% 50HZ;
8、外形尺寸:250mm(长) *280mm(宽)*700mm(高);
9、本机采用精密导柱.保证在试用时上下压头不偏移。
10、上下压头60度。采用优质钢制成。
11、整机重量。44KG 
Second, technical parameters:
1, jack work pressure: 100Mpa
2, large sample height 120
3, force sensor a large range: 100KN
4. A high precision pressure transmitter is used. The accuracy reaches 0.001KN.
5, built-in lead storage battery can meet the field continuous work for more than 12 hours
6, the sample height. 120mm
7, power: AC 220V ± 10% 50HZ;
8, dimensions: 250mm (length) * 280mm (width) * 700mm (height);
9. This machine adopts precision guide column to ensure that the upper and lower pressure heads are not offset during the trial.
10. The upper and lower indenters are 60 degrees. Made of high quality steel.
11, the weight of the whole machine. 44KG

三,岩石点荷载仪计算方法:
点载荷指数(Iβ)系点载荷试验岩样破坏时的载荷(P)与加荷点距离(D)的平方之比1β-=P/D2,但在应用点载荷强度求岩石抗压强度时,来用Ir(50)作为换算指标。Ir(50)为直径为50mm标准试件,求得点载荷强度指数Ir(50)。当试件不符合Ir(50)定义所规定的标准尺寸时,则应进行尺寸效应和形状效应的修正。
中国标准CB 50218--94《工程岩体分级标准》中规定的岩石点荷载强度试验的尺寸要求及Ir(50)的修正计算公式如下:
(1)试件尺寸:
规则试件。径向加载试验用的岩芯,直径30mm≤d≤70mm,长度为岩芯直径的1.4倍:轴向加载试验用的岩芯,直径取30 mm≤d≤70 mm,长度为岩芯直径的0.5~1倍。
(2)当试件尺寸与标准试件尺寸一致时,取Kd=1,不一致情况下,K按式(2)计算. 在使用式(1)时,当测试采用圆性状岩芯时,取KDd=1 当测试采用不规则试件时取Kd=1。
(3) 对每组试件,计算点荷载强度指数的平均值。
除上述方法外,亦可应用布劳奇(E.Broch)和富兰克林(J.A. Franklin)所推荐的点荷载强度试验尺寸修正值曲线
Third, the calculation method:
Point load index (Iβ) line load test The ratio of the load (P) at the time of rock sample failure to the square of the load point distance (D) is 1β-=P/D2, but when applying the point load strength to obtain rock compressive strength , use Ir (50) as a conversion indicator. Ir (50) is a 50 mm standard test piece, and the point load strength index Ir (50) is obtained. When the test piece does not meet the standard size specified in the definition of Ir (50), the size effect and shape effect should be corrected.
The dimensional requirements for the rock point load strength test specified in the Chinese Standard CB 50218--94 "Engineering Rock Mass Grading Standards" and the revised calculation formula for Ir(50) are as follows:
(1) Specimen size:
Rule test piece. Core for radial loading test, diameter 30mm≤d≤70mm, length 1.4 times of core diameter: core for axial loading test, diameter 30mm≤d≤70 mm, length is core diameter 0.5~1 times.
(2) When the size of the test piece is the same as the size of the standard test piece, take Kd=1. In case of inconsistency, K is calculated according to formula (2). When using formula (1), when the test adopts circular core, take KDd=1 Take Kd=1 when the test uses irregular test pieces.
(3) For each set of test pieces, calculate the average of the point load strength index.
In addition to the above methods, the point load strength test size correction curve recommended by E. Broch and J.A. Franklin can also be applied.

 




 


YXDZ-3型岩石点荷载仪

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