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玻璃鋼錨桿的錨尾形式有哪兩種?

全螺紋玻璃鋼錨桿形式為左旋或右旋螺紋桿體,其螺紋可作為錨頭使錨桿錨固,也可配合螺母作為錨尾使用??招牟Aт撳^桿常作為注漿錨桿使用。全螺紋玻璃鋼錨桿的抗拉強度≥300MPa,抗剪強度≥75MPa,扭矩 ≥40N·m。全螺紋玻璃鋼錨桿使用樹脂錨固劑,在錨固長度為 380± 50mm 時,其錨固力達到 50—90KN。

玻璃鋼錨桿的錨尾形式有兩種:一種是把螺紋鋼套黏結在桿體尾部,螺母擰在螺紋鋼套上固定托盤;另一種是在桿體尾部沿錨桿體軸向切開一切縫,錨桿配件帶切口的護套對準切縫裝在桿體尾部,外套裝在護套上,扁楔打入切縫中。

玻璃鋼錨桿的缺點是:在錨頭部位存在著小孔,降低了桿體強度;錨尾采用黏結鋼套結構,不牢固,錨固力??;采用錨尾切口加護套、錨桿配件外套結構,破壞了桿體結構。降低了桿體強度,不能對圍巖施加預應力,且不易安裝。同時,這種玻璃鋼錨桿還存在著生產自動化程度低、工藝復雜的缺點。

玻璃鋼錨桿,是當代煤礦巷道支護的***基本的組成部分,它將巷道的圍巖加固在一起,使圍巖自身起到支護作用?,F在玻璃鋼錨桿不僅用于礦山,也用于工程技術中,對邊坡、隧道、壩體起到加固作用。

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