Cast-in-place outdoor step member and method of decreasing differential settlement between outdoor step member and main building

Abstract

The invention discloses a cast-in-place reinforced concrete outdoor step member, comprising a cast-in-place reinforced concrete outdoor step and further comprising an upper support and a lower support both disposed on a main building. Upper and lower portions of the back of the reinforced concrete outdoor step are provided with upper and lower step connectors, respectively. The cast-in-place reinforced concrete outdoor step member further comprises a concrete leveling cushion layer and PVC (polyvinyl chloride) pipe piles or PP-R (polypropylene random) pipe piles. Further disclosed is a method of decreasing differential settlement between the cast-in-place reinforced concrete outdoor step member and the main building. The rigidity and strength of the outdoor reinforced concrete step member are improved; materials of a pile foundation are obtained in situ, the cost is low, rusting is rare; the differential settlement between the outdoor step member and the main building is effectively controlled and is reduced from original 80-120mm to 10-20mm, so that settlement of the outdoor step member harmonizes with that of the main building, using is unaffected, and bad social impact is avoided.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to cast-in-place reinforced concrete outdoor steps, and also relates to a method for reducing differential settlement between reinforced concrete outdoor steps and a main building. Background technique [0002] After the construction of the main building is completed, the concrete outdoor steps will be constructed. Since the foundation of the main building is located on the bearing layer, or the pile foundation construction is carried out, the settlement of the main building is as small as 20~40mm; while the concrete outdoor steps Due to the following five reasons, the settlement of the steps is relatively large, such as 80~160mm, which affects the use and is unsightly (large cracks and staggered steps between the steps and the main building, and cracks on the steps themselves, especially in many residential areas When this situation occurs, the social impact is extremely bad...

AI Technical Summary

Problems solved by technology

[0002] After the construction of the main building is completed, the concrete outdoor steps will be constructed. Since the foundation of the main building is located on the bearing layer, or the pile foundation construction is carried out, the settlement of the main building is as small as 20~40mm; while the concrete outdoor steps Due to the following five reasons, the settlement of the steps is relatively large, such as 80~160mm, which affects the use and is unsightly (large cracks and staggered steps between the steps and the main building, and cracks on the steps themselves, especially in many residential areas When this happens, the social impact is extremely bad

1) The concrete outdoor steps are often located on the backfill instead of the bearing layer, and the consolidation and settlement of the backfill itself is relatively large; 2) Since the bottom of the concrete outdoor steps is a slope, the slope-shaped backfill is more It is difficult to tamp, which leads to large settlement of cast-in-place concrete steps on the slope soil that is difficult to tamp; 3) The concrete outdoor steps are relatively light, and generally do not attract attention, and foundation treatment will not be carried out, resulting in the settlement of the concrete outdoor steps being much larger than that of the main body 4) There is no connection between the concrete outdoor steps and the main building, resulting in unconstrained settlement of the concrete outdoor steps; 5) The concrete outdoor steps are all made of traditional cast-in-place concrete, and there is no reinforcement. , due to its own strength and rigidity, the concrete outdoor steps will crack themselves and cause the facing material of the steps to crack

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