1, planesupport systemThe composition of the
Generally, the plane support system should be composed of waist beam, horizontal support and column. The horizontal support should have strong integrity and plane stiffness, so that the force transmission of each part of the support is reliable and uniform.
The role of the waist beam is to strengthen the integrity of the retaining pile and transfer the horizontal force to the supporting members. Therefore, the waist beam is required to have larger plane stiffness and be connected with retaining pile reliably.
The function of the column is to ensure the longitudinal stability of the horizontal support and bear the dead weight of the horizontal support and other vertical loads. It requires better stiffness and smaller vertical displacement.
According to the specific situation of the project, the levelsupportIt can be used to brace, bevel brace and figure eight brace and other forms of plane structure system.
2, the layout of plane support system
The number of horizontal support channels to be arranged in the vertical plane of foundation pit should be determined by calculation according to the construction requirements of foundation pit depth and earthwork excavation.
The upper and lower horizontal support axes should be arranged in the same vertical plane. The net vertical distance between adjacent horizontal supports should not be smaller than or equal to3m, should not be less than when using mechanical excavation and transportation 4m; The set horizontal support elevation of each layer shall not interfere with the construction of the bottom plate and floor members of the underground structure of the main project.
In general, the horizontal cap beam at the top of retaining pile should be used as the first levelsupportThe waist beam.
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