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A platform for research: civil engineering, architecture and urbanism
Variable-stiffness underground diaphragm wall of rectangular foundation pit and dynamic design method of variable-stiffness underground diaphragm wall
The invention discloses a rectangular foundation pit variable stiffness underground diaphragm wall and a dynamic design method thereof, and the method comprises the following steps: 1, building an O1x coordinate axis and an O2y coordinate axis according to the rectangular characteristics of a foundation pit; 2, an expression of the long side rigidity Ex and an expression of the short side rigidity Ey of the underground diaphragm wall of the foundation pit are established; 3, according to the expressions of the long side rigidity Ex and the short side rigidity Ey, the rigidity of each side of the foundation pit is obtained, then a three-dimensional finite element model of the foundation pit is established, then all stages of foundation pit excavation are simulated through numerical values, the maximum bending moment, shearing force and deformation in the whole stages are output, and the foundation pit three-dimensional finite element model is established. And 4, judging whether the maximum bending moment, the maximum shearing force, the maximum deformation, the allowable bending moment, the allowable shearing force and the allowable deformation all meet the relative error limit range or not. The variable stiffness calculation formula of the long side and the short side of the foundation pit is designed, so that the stiffness of the diaphragm walls at all positions of the foundation pit is matched with the deformation of the diaphragm walls at all positions of the foundation pit, excessive design is avoided, and the material cost is reduced.
一种矩形基坑变刚度地下连续墙及其动态设计方法，包括以下步骤：步骤一：根据基坑的矩形特征，建立O1x坐标轴和O2y坐标轴；步骤二：建立基坑地下连续墙的长边刚度Ex的表达式和短边刚度Ey的表达式；步骤三：先根据长边刚度Ex和短边刚度Ey的表达式，获取基坑各边的刚度，再建立基坑三维有限元模型，然后通过数值模拟基坑开挖的各个阶段，输出整个阶段中的最大弯矩、剪力、变形，步骤四：判断最大弯矩、最大剪力、最大变形与允许弯矩、允许剪力、允许变形是否均满足相对误差界限范围。本设计基坑长边及短边的变刚度计算式，使基坑各处地连墙的刚度与基坑各处地连墙的变形相匹配，避免过度设计，减少材料成本。
Variable-stiffness underground diaphragm wall of rectangular foundation pit and dynamic design method of variable-stiffness underground diaphragm wall
The invention discloses a rectangular foundation pit variable stiffness underground diaphragm wall and a dynamic design method thereof, and the method comprises the following steps: 1, building an O1x coordinate axis and an O2y coordinate axis according to the rectangular characteristics of a foundation pit; 2, an expression of the long side rigidity Ex and an expression of the short side rigidity Ey of the underground diaphragm wall of the foundation pit are established; 3, according to the expressions of the long side rigidity Ex and the short side rigidity Ey, the rigidity of each side of the foundation pit is obtained, then a three-dimensional finite element model of the foundation pit is established, then all stages of foundation pit excavation are simulated through numerical values, the maximum bending moment, shearing force and deformation in the whole stages are output, and the foundation pit three-dimensional finite element model is established. And 4, judging whether the maximum bending moment, the maximum shearing force, the maximum deformation, the allowable bending moment, the allowable shearing force and the allowable deformation all meet the relative error limit range or not. The variable stiffness calculation formula of the long side and the short side of the foundation pit is designed, so that the stiffness of the diaphragm walls at all positions of the foundation pit is matched with the deformation of the diaphragm walls at all positions of the foundation pit, excessive design is avoided, and the material cost is reduced.
一种矩形基坑变刚度地下连续墙及其动态设计方法，包括以下步骤：步骤一：根据基坑的矩形特征，建立O1x坐标轴和O2y坐标轴；步骤二：建立基坑地下连续墙的长边刚度Ex的表达式和短边刚度Ey的表达式；步骤三：先根据长边刚度Ex和短边刚度Ey的表达式，获取基坑各边的刚度，再建立基坑三维有限元模型，然后通过数值模拟基坑开挖的各个阶段，输出整个阶段中的最大弯矩、剪力、变形，步骤四：判断最大弯矩、最大剪力、最大变形与允许弯矩、允许剪力、允许变形是否均满足相对误差界限范围。本设计基坑长边及短边的变刚度计算式，使基坑各处地连墙的刚度与基坑各处地连墙的变形相匹配，避免过度设计，减少材料成本。
Variable-stiffness underground diaphragm wall of rectangular foundation pit and dynamic design method of variable-stiffness underground diaphragm wall
一种矩形基坑变刚度地下连续墙及其动态设计方法
YANG JINLIU (author) / CHENG KANG (author) / WANG JINKUI (author) / ZHU RU (author) / HU YUE (author) / HUANG ZHENGKAI (author) / LIU SUYUN (author) / XU TENGHUI (author) / LIANG HAO (author)
2022-04-29
Patent
Electronic Resource
Chinese
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