易坍塌的孔 的英文怎麼說

中文拼音 [yìtāntādekǒng]
易坍塌的孔 英文
caving hole
  • 易 : Ⅰ形容詞1. （容易） easy 2. （平和） amiable Ⅱ動詞1. （改變; 變換） change 2. （交換） exchange Ⅲ名詞（姓氏） a surname
  • 坍 : 動詞（倒塌） collapse; fall; tumble; crumble down
  • 的 : 4次方是 The fourth power of 2 is direction
  • 坍塌 : [地] caving-in; collapse; sloughing; fall down; crumble坍塌物 dilapidation
  1. Abstract : the paper presented a kind of drilling hole method that adopted direct circulation and percussion drilling, casing and cliff - protection by mud. the method applied in the complex gravel layer which has the trend to emerge cave - in and drop from the drilling wall

    文摘:介紹一種在砂卵石地層層厚復雜、孔壁易掉塊、易坍塌的鉆孔的成孔方法? ?正循環回轉與沖擊鉆進、套管與泥漿護壁成孔。
  2. Abstract : in some project, pebble is used in bearing stratum. for the resean of lower strengthand bad property of construction. the bearing capacity of pebble can ' t achieve the reauirement of up - structure. but the pebble soild has higher permeability coefficient and placeability. the method has remarkable economic results

    文摘:在以礫卵石層為持力層的樁基設計中，由於其可鉆性差、易坍塌，強度相對較低，但是具有較大的孔隙率和滲透系數，可灌性較好，採用一定壓力對鉆孔灌注樁樁底礫卵石持力層注入水泥漿液對其進行加固處理，可以較大地提高其承載力，並能取得較為明顯的經濟效益。
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