3results about How to "Enhanced pull-out load bearing performance" patented technology

This application belongs to the field of precast bamboo pile structures and discloses a sleeve-type precast bamboo pile structure, including a central bamboo pile and branch bamboo piles. The central bamboo pile is vertically inserted into the soil to bear vertical loads; the branch bamboo piles are inserted into the soil at a predetermined angle, with the lower end embedded and connected to the central bamboo pile, and the upper end extending outward in a direction away from the central axis of the central bamboo pile, thus forming a spatial force-bearing system. The inclined branch bamboo piles are equivalent to setting rigid barbs on the central bamboo pile in terms of mechanical transmission, and work together to create an "inverted cone soil locking" effect. When the pile is subjected to an upward pull force, the pressure exerted by each branch bamboo pile on the soil above and around it forces the pile foundation area to form an inverted cone-shaped soil plug or soil compression zone. Based on this mechanical mechanism, to pull out the pile, the self-weight and cohesion of the inverted cone-shaped soil must first be overcome, thereby significantly consuming the pull-out force and greatly improving the pull-out bearing capacity of the pile foundation.

The application discloses a design method and structure of a round-truncated-cone-shaped foundation of a photovoltaic support in a rock area, and the method comprises the following steps: S1, determining an implementation area; S2, obtaining a standard value of a downward pressure P, a standard value of an uplift force T, a standard value of a horizontal force V and a bending moment M acting on the round-truncated-cone-shaped foundation; S3, determining initial parameters of the round-truncated-cone-shaped foundation according to the structure of the photovoltaic support and the load acting on the round-truncated-cone-shaped foundation, and combining the design specifications of the foundation slab and the anchor rod; S4, calculating the comprehensive bearing capacity of the round-truncated-cone-shaped foundation according to the initial parameters of the round-truncated-cone-shaped foundation; and S5, checking the parameters of the round-truncated-cone-shaped foundation. The application provides sufficient uplift resistance, horizontal resistance, compression resistance and shearing resistance bearing capacity for the support column of the photovoltaic support by utilizing the stress characteristics of the photovoltaic support structure, ensures the safety of the bearing capacity of the foundation, reduces the foundation engineering cost, and simultaneously shortens the construction period of the integrated construction of the photovoltaic support steel column and the foundation.

The invention discloses a brick-clad city wall ruins anchoring structure based on EBTP anchor rods, comprising EBTP anchor rods and brick-clad walls; steel bars are inserted into bamboo pipes, the length of the steel bars is greater than the length of the bamboo pipes, the steel bars are inserted into the bamboo pipe sections and extended into the anchoring sections in the rammed earth of the city wall, the steel bars extend out of the bamboo pipe sections and extend into the anchoring sections in the brick-clad walls, the steel bars are inserted out of the outer end face of the brick-clad walls and fixed by bolts and anchor plates; the expanded anchor section is arranged in the middle section of the steel bars in the bamboo pipes, and is located between the pressure section and the tension section of the brick-clad walls. The critical anchoring length is multiplied and the ultimate pull-out bearing capacity is greatly improved through the transformation of multiple force transmission modes, and the structure can meet the anchoring requirements of large rammed earth ruins structures such as brick-clad city walls and rammed earth city walls.