shrink hole 中文意思是什麼
shrink hole
解釋
收縮孔-
However, there are many troubles in constructing in gravel, such as drilling difficult, hole collapsing and drill losing, which will lead to enlarge or shrink pile ' s diameter, form fault pile, delay the time, increase the use of material and higher the investment
但灌注樁在卵石層中施工或穿越卵石層會遇到鉆進困難、孔壁易塌、掉鉆卡鉆等諸多問題,造成擴徑、縮徑、斷樁等病害,使工期延長,材料用量增加,費用增高。
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