perimeter hole
英 美
周边孔
... loading(charging),庄药 perimeter hole,周边孔 pilot tunnel,导洞 ...
周边眼
周边眼(perimeter hole)。沿隧道周边布臵的 炮眼称为周边眼。
At present, piles with circular are used in all casting bore-hole pile foundations, but these piles have smaller perimeter and smaller section modulus as compare with the rectangular ones;
目前钻孔灌注桩基中的桩均为园形截面,和矩形截面的桩相比,园桩的周长、断面系数较小,抗弯能力差。
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