深基坑双排桩—锚杆复合支护结构变形及受力特性研究
发布时间：2019-03-07 10:24
【摘要】：双排桩-锚杆复合支护结构是一种新颖的基坑支护形式,兼备了传统桩锚支护结构及双排桩支护结构各自的特点,具有超静定结构特征,整体刚度大,控制基坑变形效果好。目前对于该结构体系的研究较少,没有形成被广泛认可的计算理论,理论研究远远滞后于工程实践。本文在研究现有双排桩及桩锚支护结构理论的基础上结合双排桩-锚杆复合支护的结构自身特点,提出了适合该支护结构的新的计算模型及计算方法。分析了该计算模型的受力特性并将其应用于实际工程算例中,通过与现行工程设计软件计算结果的对比分析,验证了新计算模型及计算方法的合理性和适用性。以“营口万达广场”基坑工程项目为依托,建立了FLAC~(3D)三维数值模型,研究了双排桩-锚杆复合支护结构的变形规律及受力特性,并将模拟结果与工程实测监测数据对比,验证了数值模型的合理性并分析了存在差异的原因。通过在数值计算模型中调整支护结构参数,对双排桩-锚杆复合支护结构体系进行优化设计,得到了各因数的影响规律。
[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.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU753
本文编号：2436028
[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.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU753
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