Handan Zhongfu Industrial And Mining Accessories Co., Ltd.
Handan ZhongFu company is a professional manufacturer for underground mining supporting products with over ten year experience. We can manufacture Split sets ,friction bolt, Combi split sets, Expandable friction bolt,Swellex, Threaded bar bolt, Cable bolt, Combi cable bolt, Welded mesh, Domed plate, Nuts, other mining Equipment.
Testing required for tunnel anchors：
Appearance quality: The appearance quality of anchor rod body that is fittings is visually inspected.
Size: the size that deviation should be used steel tape measure, vernier caliper, I-beam, plug rule, thread gauge for inspection.
Anchor rod body - connecting sleeve assembly bearing capacity: longitudinal tensile specimen of the assembly is installed according to the requirements, the distance between the clamping section and the connecting sleeve should meet the requirements, and the length of the two sections of the anchor rod body in the sleeve should be equal. Specimen installation should ensure that the clamped specimen keeps the anchor rod body concentric. Conduct tensile test in accordance with the provisions of GB/T 28900 until the specimen slips or breaks, and record the maximum force value, that is, the measured bearing capacity of the anchor rod body-connecting sleeve assembly.
Anchor rod body - pad and nut assembly bearing capacity: different diameters of the anchor rod body test should be equipped with steel regulator plate, regulator plate side length should be greater than the pad side length or diameter of 60mm, and its thickness should be 40mm. will be matched with the nut screwed completely into the end of the threaded section of the anchor rod body, will be adjusted to the plate into the tensile frame, and place the assembly parts. Carry out the tensile test according to the provisions of GB/T 28900 until the specimen slips or breaks, and record the maximum force value, that is, the measured bearing capacity of the anchor rod body - pad and nut assembly.
Mechanical anchors ultimate bearing capacity: the anchor rod body, mechanical anchors assembled into a test component, loaded into the support steel sleeve and make the shell clip sheet expansion. The test machine to the specified rate of the specimen to apply tension, to be tensile force rose to the nominal diameter of the anchor body corresponding to the ultimate bearing capacity, stop adding force, and keep 3min. test components in the components did not produce cracking is judged to be qualified.
Our address
West Side Of Jianshe Street, Southwest Industrial Zone, Linmingguan Town, Handan, Hebei, China
Phone Number
+8615830050566
zfgongkuang@aliyun.com
