樁基礎施工技術現狀.rar

樁基礎施工技術現狀及發展趨向淺談
1 樁基礎施工技術現狀
　　按施工方法，樁可分為非擠土樁、部分擠土樁和擠土樁三大類。再細分，樁的施工方法超過300種。施工方法的變化、完善、更新可以說是日新月異。圖1中列出樁的部分施工類型。
　　以埋入式樁為例，圖中僅列出三大類，實際上細分可有80種以上類型。所謂中掘施工法樁是把小于樁徑30～40mm的長螺旋鉆、或鉆桿端部裝有攪拌翼片的螺旋鉆及鉆斗鉆等插入樁的中空部，在鉆頭附近的地層連續鉆進，使土沿中空部上升，從樁頂排土的同時將樁沉設。在施工中通常將樁端注入壓縮空氣和水，促進鉆進的同時也使樁沉順利。為使樁獲得更大的承載力，樁埋入孔中后可分別采用量終打擊方式、樁端加固方式或擴大頭加固方式。按中掘埋入工藝、鉆機、承載力發揮方法及采用的預制樁種類等，中掘施工法樁又可細分為40余種樁型。而預鉆孔埋入式樁亦可細分為40余種。
　　以泥漿護壁法鉆孔擴底灌注樁的成孔方法為例，亦有40種以上，擴底方式可分為反循環擴底、鉆斗鉆擴
Pile Foundation Construction Status and Development of
1 Foundation Construction Status
By construction method, the pile can be divided into non-displacement pile, pile some soil compaction and displacement pile three categories. Subdivided, pile construction method more than 300. Changes in construction methods, improve, update can be said with each passing day. Figure 1 lists some of the construction of pile type.
With embedded pile, for example, the figure only three categories are listed, in fact, can be broken down more than 80 types. The so-called dig construction method in the pile is the pile diameter to less than 30 ~ 40mm long spiral drill, or drill pipe equipped with a stirring wing tip of the auger drill and drill bucket drilling hollow pile into the Department, in formation near the drill row drilling, the Department of the soil, up along the hollow, the top row of soil from the pile while the pile Shen set. During construction, usually pile into the air and water, while also promoting drilling pile Shen smoothly. In order to obtain greater capacity of piles, pile buried in holes in the volume were used after the end of Strike, pile reinforcement or by way of expansion of the first reinforcement. Embedded in the process by digging, drilling, and the capacity to play a method used in other types of precast piles, pile in the excavation construction method can be subdivided into 40 types of piles. The pre-bored piles can be broken down into embedded more than 40.
Drilling Slurry Wall method to reamed piles hole method, for example, have more than 40, expanding the end of cycle can be divided into anti-footed, fighting drill extension drill
 

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