Method for repairing the flow surface of large-area steep slope drainage structures with ultra-high performance concrete

Abstract

The invention discloses a method for repairing the flow surface of a large-area steep-slope drainage structure with ultra-high performance concrete, which mainly includes four steps of construction preparation, fixing of base columns, installing brackets, and pouring of ultra-high performance concrete. The method for repairing the overflow surface of a large-area steep-slope drainage building with ultra-high performance concrete is installed through a segmented structure. Fixedly connected to the ultra-high-performance concrete I-beam, the inner side forms a pouring chamber, and pours ultra-high-performance concrete into the pouring chamber to form an ultra-high-performance concrete filling layer, which provides a reasonable structure, simple installation, high installation efficiency and low cost. A method for repairing the overflow surface of large-area steep-slope drainage structures with ultra-high-performance concrete.

Description

technical field [0001] The invention relates to the field of hydraulic engineering maintenance, in particular to a method for repairing the overflow surface of a large-area steep-slope drainage structure with ultra-high performance concrete. Background technique [0002] Ultra-high performance concrete is a kind of developed in recent years with extremely high mechanical properties, excellent volume stability, excellent shrinkage crack resistance, compressive strength up to 150MPa, electric flux below 100C, sulfate resistance level exceeding KS150, and The grade exceeds F500, and it is a composite material with ultra-high strength and durability, and its working life can reach 200 years. Using ultra-high-performance concrete to repair the flow surface of reinforced concrete structures with severe erosion or cavitation erosion has strong abrasion and impact resistance, good durability, and high cost performance, which can overcome the shortcomings of the above materials. How...

AI Technical Summary

Problems solved by technology

However, when repairing the flow surface of the steep slope of the drainage structure, only one-sided formwork can be installed on the outside, and the formwork cannot be supported and reinforced on the outside. When using wooden formwork or steel formwork, it can only be used on the steep slope of the drainage structure. The ties are pre-embedded on the surface and pass through the formwork, and the formwork is internally reinforced. After the repair is completed, the formwork is removed. In order to prevent the corrosion and expansion of the exposed ties, which will lead to the damage of the concrete on the overflow surface of the drainage structure, the exposed ties need to be pulled out. Dig a small pit at the flow surface of the structure of the ribs, cut off the tie bars along the bottom of the pit, and then smooth the small pit with mortar; but the above method is used to repair the structure flow surface of the drainage structure, the speed is slow, and the repaired drainage The appearance quality of the flow surface of the building is poor, and the mortar for repairing small pits is easily washed out by high-speed water, leaving quality problems

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