A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Horizontal variable-stiffness foundation pit supporting structure and design method thereof
The invention discloses a design method of a horizontal variable-rigidity foundation pit supporting structure. The design method comprises the following steps that three-dimensional modeling is conducted on the foundation pit supporting structure; lateral displacement of the supporting structure is analyzed, and a plane strain ratio is obtained through calculation; for an area with the plane strain ratio smaller than 1, the structural rigidity is redundant, the corner effect of a foundation pit is considered, the row piles are connected with the concrete supports, and rigidity adjustment is conducted according to an optimization expression of the plane strain ratio; for an area with the plane strain ratio equal to 1, two groups of row piles are arranged and are connected with the concrete support through the active rigidity adjusting device. The invention further discloses the horizontal variable-rigidity foundation pit supporting structure obtained through the design method. According to the method, the corner effect (internal corners restrain deformation of the foundation pit) of the foundation pit is utilized, the plane strain ratio is introduced to partition the rigidity of the supporting structure, variable rigidity design is conducted, the cost can be effectively reduced, large deformation of the middle section of the supporting structure is reduced, and the influence of foundation pit construction on the surrounding environment is reduced.
本发明公开了一种水平变刚度基坑支护结构的设计方法，包括以下步骤：对基坑支护结构进行三维建模；对支护结构侧向位移进行分析，并计算得到平面应变比；对于平面应变比小于1的区域，结构刚度冗余，考虑基坑的拐角效应，将排桩与混凝土支撑相连，按照平面应变比的优化表达式进行刚度调整；对于平面应变比等于1的区域，将排桩设置两组并通过主动式刚度调节装置与混凝土支撑相连。本发明还公开了该设计方法所得水平变刚度基坑支护结构。本发明利用了基坑的拐角效应(阴角抑制基坑变形)，引入平面应变比对支护结构的刚度进行分区，进行变刚度设计，能有效减少成本，减小支护结构中段的大变形，降低基坑施工对周围环境的影响。
Horizontal variable-stiffness foundation pit supporting structure and design method thereof
The invention discloses a design method of a horizontal variable-rigidity foundation pit supporting structure. The design method comprises the following steps that three-dimensional modeling is conducted on the foundation pit supporting structure; lateral displacement of the supporting structure is analyzed, and a plane strain ratio is obtained through calculation; for an area with the plane strain ratio smaller than 1, the structural rigidity is redundant, the corner effect of a foundation pit is considered, the row piles are connected with the concrete supports, and rigidity adjustment is conducted according to an optimization expression of the plane strain ratio; for an area with the plane strain ratio equal to 1, two groups of row piles are arranged and are connected with the concrete support through the active rigidity adjusting device. The invention further discloses the horizontal variable-rigidity foundation pit supporting structure obtained through the design method. According to the method, the corner effect (internal corners restrain deformation of the foundation pit) of the foundation pit is utilized, the plane strain ratio is introduced to partition the rigidity of the supporting structure, variable rigidity design is conducted, the cost can be effectively reduced, large deformation of the middle section of the supporting structure is reduced, and the influence of foundation pit construction on the surrounding environment is reduced.
本发明公开了一种水平变刚度基坑支护结构的设计方法，包括以下步骤：对基坑支护结构进行三维建模；对支护结构侧向位移进行分析，并计算得到平面应变比；对于平面应变比小于1的区域，结构刚度冗余，考虑基坑的拐角效应，将排桩与混凝土支撑相连，按照平面应变比的优化表达式进行刚度调整；对于平面应变比等于1的区域，将排桩设置两组并通过主动式刚度调节装置与混凝土支撑相连。本发明还公开了该设计方法所得水平变刚度基坑支护结构。本发明利用了基坑的拐角效应(阴角抑制基坑变形)，引入平面应变比对支护结构的刚度进行分区，进行变刚度设计，能有效减少成本，减小支护结构中段的大变形，降低基坑施工对周围环境的影响。
Horizontal variable-stiffness foundation pit supporting structure and design method thereof
一种水平变刚度基坑支护结构及其设计方法
ZHOU FENG (author) / DONG XIN (author) / CHEN TINGZHU (author) / WANG XUDONG (author) / ZHU RUI (author) / LIU HENG (author) / WAN ZHIHUI (author) / PAN YUE (author) / DOU JIANWEI (author) / WANG MENGLING (author)
2024-01-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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