異形灰土井樁承載特性的實測結(jié)果
張之穎 呂 剛 強靳毅 郝增志
- 摘 要
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張之穎 （西安交通大學 710049）呂 剛 強靳毅 （西安市建筑設計研究院 710054）
郝增志 （機械工業(yè)部勘察研究院 西安 710043）
[提要] 灰土井樁是一種柔性樁，在陜甘地區(qū)的多層建筑基礎中已體現(xiàn)出較明顯的有效性和經(jīng)濟性，其實用價值已得到證實，灰土井樁作為受力樁，其樁型一直采用大孔徑的圓柱形。但實踐證明這種樁形在灰土井樁基礎中較為突出的問題是其承載力偏低、沉降值偏大。針對這一問題，本文提出了異形灰土并樁概念，介紹了柔性樁的現(xiàn)場靜力測試方法，和二種異形樁與常規(guī)形灰土井樁承載性能的對比試驗結(jié)果。
[關鍵詞] 異形灰土井樁 承載性能 實測結(jié)果
Lime-soil well-shaped pile belongs to the same class of non-reinforcing bar piles. Its usability and economy has been proved since it used as some foundations i.n loess region. This bearing pile used to be cylinder and its diameter is often very large. However, the practice indicated the problem of this kind of pile is that its bearing capacity is low but settlement is large. According to this, a new concept of special shaped lime-soil bearing pile is set forth in the paper. And also introduce the speical test method for the non-reinforcing bar piles and the comparative test results of load-bearing property between the special shaped pile and the common cylinder pile.
Keywords: special shape; lome -soil bearing pile; bearing capacity; test results
