易坍塌地層 的英文怎麼說
中文拼音 [yìtāntādecéng]
易坍塌地層
英文
caving ground-
The drilling technology of stratum collapseleaking off
1北油田易坍塌漏失阻卡地層的鉆井技術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。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。Abstract : the traditional method of anchor pile on the deep foundation pit bracing in the gravel stratum with high hardness, poor drilling and easy slump is complicated owing to difficult construction, low efficiency and high cost
文摘:卵礫石地層硬度大，可鉆性差，易坍塌，這種地層的深基坑支護若採用傳統的錨桿樁，施工難度大，工效低，工程造價高。Analysis on stress distribution of casing in sloughing formation with finite element method
易坍塌地層橢圓形井眼內套管應力的有限元分析分享友人