A method for strengthening concrete rods of substation structure supports

Abstract

The invention discloses a reinforcement method for concrete poles of a transformer substation structural support. The reinforcement method is characterized in that steel tubes are additionally arranged on the outer sides of concrete poles of the transformer substation structural support and poured with grout to form a steel tube reinforced concrete structure; the steel tubes, the grout and the concrete poles are jointly combined to form a new stress system, thereby achieving the purpose of reinforcing a transformer substation structure and an equipment support frame; besides, as the outer steel tubes are mounted by adopting a lifting method, aloft work is avoided, and a new reinforcement technology is provided for the concrete support of a transformer substation, the reinforcement method is suitable for reinforcement of concrete poles of n-shaped and T-shaped structural supports, the reinforced concrete poles of the structural supports can meet the requirements on bearing capacity and durability, the service life of the transformer substation is prolonged, large-scale reconstruction is not needed, the construction approval process is simple and time-saving, and the characteristics of reduced upgrading and reconstruction cost, shortened reconstruction period, high safety and reliability are achieved; meanwhile, the original concrete support does not need to be dismantled, emission of a great deal of construction waste is avoided, and resources are saved, so that the reinforcement method is an environment-friendly reinforcement and reconstruction technology.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a concrete rod reinforcement method for substation frames and equipment supports. Background technique [0002] The substations built by my country's electric power sector since the 1950s and 1960s, due to the limitations of the economic conditions and technical level at that time, the outdoor structure supports of substations usually adopt prefabricated concrete structures. Insufficient wind, snow and ice loads, insufficient attention to outdoor environmental factors, and neglect of maintenance and maintenance during operation. After more than 20 years of use, it has approached or exceeded the reasonable service life of the design, and more than 90% of them have different degrees of failure. The quality problems of the substation seriously affect the safe operation of the substation, and reinforcement and transformation are urgent. Due to the natural weathering of...

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Problems solved by technology

[0003] According to national standards, 220kV and below substations are allowed to use concrete frames and brackets, and Π-shaped and T-shaped frame brackets are widely used. The concrete poles of the brackets have been damaged, the corrosion of the steel bars and the cracking of the concrete have endangered the safe operation of the substation, and must be repaired, reinforced or updated, usually under power outages, and the most thorough way is to update them with concrete-filled steel pipe poles, which Not only special equipment and operators are needed, but also all power distribution facilities need to be dismantled. During the dismantling and installation process, the power distribution facilities are more damaged, and the direct investment in upgrading and reconstruction projects is relatively large. Power outages are related to the scheduling and stability of the entire power grid. The economic construction of the power supply area has caused huge losses and impacts. Therefore, it is particularly important to develop a fast and efficient reinforcement technology for the substation concrete frame under the condition of no power outage. The commonly used polymer cement mortar repair method, external bonded steel reinforcement method, etc. High-altitude operations are required, and it is impossible to achieve non-stop reinforcement. The carbon fiber reinforcement method has the risk of causing high-voltage short-circuit accidents. It is also not suitable for the reinforcement of outdoor concrete poles in substations.

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