【摘要】：雙排樁-錨桿復合支護結構是一種新穎的基坑支護形式,兼?zhèn)淞藗鹘y(tǒng)樁錨支護結構及雙排樁支護結構各自的特點,具有超靜定結構特征,整體剛度大,控制基坑變形效果好。目前對于該結構體系的研究較少,沒有形成被廣泛認可的計算理論,理論研究遠遠滯后于工程實踐。本文在研究現(xiàn)有雙排樁及樁錨支護結構理論的基礎上結合雙排樁-錨桿復合支護的結構自身特點,提出了適合該支護結構的新的計算模型及計算方法。分析了該計算模型的受力特性并將其應用于實際工程算例中,通過與現(xiàn)行工程設計軟件計算結果的對比分析,驗證了新計算模型及計算方法的合理性和適用性。以“營口萬達廣場”基坑工程項目為依托,建立了FLAC~(3D)三維數(shù)值模型,研究了雙排樁-錨桿復合支護結構的變形規(guī)律及受力特性,并將模擬結果與工程實測監(jiān)測數(shù)據(jù)對比,驗證了數(shù)值模型的合理性并分析了存在差異的原因。通過在數(shù)值計算模型中調(diào)整支護結構參數(shù),對雙排樁-錨桿復合支護結構體系進行優(yōu)化設計,得到了各因數(shù)的影響規(guī)律。
[Abstract]:Double-row pile-anchor composite supporting structure is a novel supporting form of foundation pit. It has the characteristics of traditional pile-anchor retaining structure and double-row pile supporting structure. It has the characteristics of statically indeterminate structure, large overall stiffness and good control effect on foundation pit deformation. At present, there is little research on the structure system, and no widely accepted computational theory has been formed. The theoretical research lags far behind the engineering practice. On the basis of studying the existing theory of double-row pile and pile-anchor supporting structure, combined with the characteristics of double-row pile-anchor composite support structure, a new calculation model and calculation method suitable for this support structure is put forward in this paper. The force characteristics of the calculation model are analyzed and applied to practical engineering examples. The rationality and applicability of the new calculation model and calculation method are verified by comparing with the calculation results of the current engineering design software. Based on the foundation pit project of "Wanda Square in Yingkou", the FLAC~ (3D) three-dimensional numerical model is established. The deformation law and mechanical characteristics of double-row pile-anchor composite supporting structure are studied, and the simulation results are compared with the measured monitoring data. The rationality of the numerical model is verified and the reasons for the difference are analyzed. By adjusting the parameters of the supporting structure in the numerical calculation model, the optimal design of the double-row pile-anchor composite supporting structure system is carried out, and the influence rule of each factor is obtained.
【學位授予單位】：遼寧工程技術大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU753

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