Bridge structure mass concrete intelligent temperature control system and method

Abstract

The invention relates to an intelligent temperature control system and method for mass concrete of a bridge structure. According to the system, point type thermometers are pre-buried in key parts of the mass concrete structure of the bridge structure to monitor the real-time change of the temperature inside and on the surface of the concrete; the temperature data is transmitted to an integrated intelligent temperature control cabinet, so that the integrated intelligent temperature control cabinet automatically adjusts the cooling water temperature and flow based on a temperature-flow coupling control model according to the real-time change condition of the concrete temperature and the temperature control standard; a thermometer is arranged in a water inlet tank of the water supply system to monitor the real-time change of cooling water temperature and is used for adjusting the flow of return water flowing back to the water inlet tank; through the design of water supply and return system pipelines, timing reversing of water flow in the cooling water pipe is achieved; the bridge structure mass concrete temperature control standard is determined through on-site actual construction and environmental data and numerical simulation and transmitted to the integrated intelligent temperature control cabinet, intelligent temperature control over the bridge structure mass concrete in the construction period is achieved, and harmful temperature cracks are prevented from occurring in the concrete.

Description

technical field [0001] The invention relates to the technical field of intelligent temperature control of reinforced concrete, in particular to an intelligent temperature control system and method for large-volume concrete in a bridge structure. Background technique [0002] Mass reinforced concrete refers to a mass concrete structure with a reinforcement ratio greater than 0.5%. In the temperature control of mass concrete structures, the concrete pouring temperature, the temperature rise of the heat of hydration and the stabilization temperature are three key elements. Among them, the concrete pouring temperature and the stable temperature are definite values, only the temperature rise of the heat of hydration is mainly adjusted by pre-embedded water pipes inside the concrete through cooling water. The sum of the concrete pouring temperature and the temperature rise of the heat of hydration is the maximum temperature of the concrete, and the difference between the maximum ...

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Problems solved by technology

[0006] However, for bridge engineering, the construction site of structural mass concrete is limited. For example, some piers are still located in the middle of the river. The intelligent water cooling system of mass concrete generally does not configure a special refrigeration unit, but uses the return water in the cooling system Mixing in a certain proportion, on the one hand, better controls the temperature difference between cooling water and concrete, on the other hand, saves the system investment cost, and the adaptability of the construction site; secondly, the mass concrete of the bridge structure is different in material and structure For dam concrete: in terms of materials, dam concrete is usually plain concrete, with no reinforcement or only reinforcement near the upstream and downstream surfaces and corridors, and the load bearing of reinforcement is usually not considered in design; in terms of bridge structure, bridges are large Compared with water conservancy projects, the volume of concrete is relatively small, and the surface temperature is greatly affected by the external environment temperature. The internal and external temperature difference in the temperature control index is also an extremely important control factor, which cannot be directly determined by referring to the relevant specifications of the hydraulic industry; Third, in bridge engineering, the mass concrete parts generally include pier foundation, pier abutment, 0# block, tower cable and anchorage, etc., with different scales, scattered locations, and simultaneous pouring. Therefore, the intelligent temperature control system needs to meet the limited requirements of bridge engineering. Site and dynamic location construction requirements, the installation location can be selected and changed according to the construction site conditions, and the temperature control capability can be assembled in modules according to the heat exchange requirements

In summary, the previous intelligent temperature control methods cannot be used for mass concrete in bridge structures.

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