Rigid gridding and pile combined foundation and its use in soft soil foundation reinforcement
A composite foundation and soft soil foundation technology, applied in soil protection, sheet pile walls, foundation structure engineering, etc., can solve the problems of limited depth of soft soil foundation, failure to meet foundation reinforcement requirements, limited strength and deformation performance, etc. Achieve the effect of improving design and construction quality, benefiting design calculation and analysis, and good reinforcement effect
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Embodiment 1
[0049] As shown in Figure 1, the rigid grid and pile composite foundation consists of prefabricated piles 1, rigid grid structure 2, tension net 4 and transition cushion 5. The prefabricated piles pass through the soft soil layer 6, and are driven from the foundation surface to the relatively hard soil layer 7. The distance between the prefabricated piles is 0.6m, and the cross-sectional size of the prefabricated square piles is 0.08m×0.08m. The top of the prefabricated pile is fixedly connected to the node 2-1 of the rigid grid. The tension net is laid on the rigid grid structure, and a 0.6m thick gravel soil transition cushion is laid on the tension net. A grid 8 is arranged in the transition cushion. The fill soil 9 is filled on the transition cushion to form a subgrade project reinforced by a composite foundation of rigid grids and piles.
[0050] The specific construction steps are as follows:
[0051] (1) As shown in Figure 3, concrete prefabricated piles are laid on ...
Embodiment 2
[0056] As shown in Figure 1, the rigid grid and pile composite foundation consists of cast-in-place piles 1, rigid grid structure 2, tension bars 3, tension nets 4 and transition cushion 5. The cast-in-place piles pass through the soft soil layer 6 and are driven from the foundation surface to the relatively hard soil layer 7. The distance between the cast-in-place piles is 3.0m, and the cross-section of the cast-in-place piles is circular with a diameter of 0.40m. The top of the cast-in-place pile is fixedly connected to the node 2-1 of the rigid grid. Tension bars are laid on the rigid grid structure. Tension mesh is laid on the tension bars. A 1.0m thick gravel soil transition cushion is laid on the tension net. A grid 8 is arranged in the transition cushion. The fill soil 9 is filled on the transition cushion to form a subgrade project reinforced by a composite foundation of rigid grids and piles.
[0057] The specific construction steps are as follows:
[0058] (1) A...
Embodiment 3
[0063] As shown in Figure 1, the rigid grid and pile composite foundation consists of prefabricated piles 1, rigid grid structure 2, tension net 4 and transition cushion 5. The prefabricated piles pass through the soft soil layer 6 and are driven from the surface of the foundation to the relatively hard soil layer 7. The distance between the prefabricated piles is 2.5m. The prefabricated piles are H-section steel piles, the model is 300×300 ("Code for Design of Steel Structures" GB50017 -2003). The top of the prefabricated pile is fixedly connected to the node 2-1 of the rigid grid. The tension net is laid on the rigid grid structure, and a 1.0m thick gravel soil transition cushion is laid on the tension net. A grid 8 is arranged in the transition cushion. The fill soil 9 is filled on the transition cushion to form a subgrade project reinforced by a composite foundation of rigid grids and piles.
[0064] The specific construction steps are as follows:
[0065] (1) As shown...
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