- 摘 要
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（東華工程科技股份有限公司， 合肥 230000）
［摘要］結合具體工程實例，采用規(guī)范中平面剛架結構模型對軟土深基坑雙排樁支護結構的變形性狀進行了深入分析，并將規(guī)范方法的計算結果與實測結果進行對比分析，最后利用有限元軟件PLAXIS 2D對雙排樁支護結構的受力和變形進行復核。研究結果表明，規(guī)范方法高估了后排樁的作用，建議適當增強樁間土傳遞土壓力的作用，增強前排樁抵抗變形作用，弱化后排樁抵抗變形的作用；建議開挖段與嵌固段采取不同的土壓力分配比例，且嵌固段的土壓力分配比例宜較開挖段大。
［關鍵詞］軟土深基坑； 雙排樁； 支護結構； 變形性狀； 計算方法
中圖分類號：TU470+.3文獻標識碼：A文章編號：1002-848X(2017)23-0086-06
Analysis of deformation behavior of double-row piles supporting structure in soft-soil deep foundation pit
Dong Yan
(East China Engineering Science and Technology Co., Ltd., Hefei 230000, China)
Abstract:Combined with specific engineering example, the plane frame structure model in the code was adopted to carry on the thorough analysis of deformation behavior of double-row piles supporting structure in soft-soil deep foundation pit, and the calculation results according to the code method were analyzed and compared with the experimental results. Finally, the finite element software PLAXIS 2D was used to review the stress and deformation of double-row piles supporting structure. The study results show that the code method over estimates the effect of piles in back rows, and it is recommended to appropriately strengthen action of soil between piles to transfer soil pressure, to enhance the ability of the front piles to resist deformation and weaken the ability of the back piles to resist deformation; it is proposed that excavated section and the embedded section adopt different earth pressure distribution ratios, and the earth pressure distribution ratio of embedded section has better to be larger than that of the excavated section.
Keywords:soft-soil deep foundation pit; double-row piles; supporting structure; deformation behavior; calculation method
作者簡介：董妍，本科，工程師，Email：miniyanfighting@163.com。
