Seamless structural method of overlong reinforced concrete pond

A reinforced concrete, seamless structure technology, used in swimming pools, building construction, public buildings, etc.

Inactive Publication Date: 2012-09-19
JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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  • Application Information

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Problems solved by technology

The seamless structure of the reinforced concrete pool of this method: in the construction stage, the shrinkage-compensating concrete is used to solve the equivalent temperature difference of hydration heat, the e

Method used

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  • Seamless structural method of overlong reinforced concrete pond
  • Seamless structural method of overlong reinforced concrete pond
  • Seamless structural method of overlong reinforced concrete pond

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specific Embodiment

[0069] A reinforced concrete pool on the ground has a size of 60×60×6m, a wall thickness of 350mm, and a water depth of 5.5m. The closing temperature is 20°C, the average temperature of the coldest month in winter is -18°C, and the water temperature in the pool is 10°C in winter.

[0070] (1) Construction stage

[0071] 1) Equivalent shrinkage rate of concrete hydration heat temperature rise

[0072] The temperature rise of concrete hydration heat is calculated according to formula (1), where β is taken as 0.3 for multi-dimensional heat dissipation, and 0.5-0.6 for one-dimensional heat dissipation. In this calculation example, β=0.5, W=360kg / m 3 , Q=340kJ / kg, C=0.96kJ / (kg.℃), γ=2500kg / m 3 , into (1) formula:

[0073] T 1 =βWQ / Cγ

[0074] =0.5×360×340 / 0.96 / 2500

[0075] =25.5°C

[0076] by T 1 The resulting shrinkage rate is calculated according to formula (2):

[0077] ε 1 =T 1 alpha c

[0078] =25.5×1×10 -5

[0079] =2.55×10 -4

[0080] 2) drying shrinkage

...

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Abstract

The invention relates to a seamless structural method of an overlong reinforced concrete pond, and is characterized in that during a construction stage, a hydration heat equivalent temperature difference and a shrinkage equivalent temperature difference stress are solved by adopting an expansive concrete, so that a shrinkage crack is not formed when the concrete is poured and formed. A restrained expansion ratio is only 50% of the conventional expansive concrete method, and an amount of doped expanding agents is only about 50% of the conventional expansive concrete method. During a long-term using stage, a temperature difference stress generated by a seasonal negative temperature difference is solved by a prestress, so that a structural crack is avoided. In comparison with the conventional prestress method, the number of prestress ribs is reduced for 50%. The seamless structural method, provided by the invention, has the advantages that respective advantages of the expanding agents and the prestress ribs are exerted, the pond is poured and formed at one time, so that integrity, shock resistance, crack and penetration resistance and durability of the concrete pond are improved, a seamless problem of each stage of the overlong pond can be solved well, the engineering construction cost is reduced, a remarkable technical progress is embodied, and the seamless structural method has very high popularization value.

Description

technical field [0001] The invention relates to an engineering building, more specifically, to an engineering building of a reinforced concrete pool. Background technique [0002] my country's "Reinforced Concrete Pool Structural Design Regulations for Water Supply and Drainage Engineering" and "Petrochemical Reinforced Concrete Pool Design Specifications" stipulate that when the size of the rectangular cast-in-place reinforced concrete pool is too long, temperature joints should be set to adapt to temperature changes. The temperature joint spacing generally does not exceed 30m. Disadvantages of setting temperature joints: Poor integrity of the pool. Due to uneven settlement of the foundation, stress and other reasons, the temperature joints are prone to misalignment, water leakage, and rubber waterstops are aging and difficult to repair. If there is no seam, measures must be taken to prevent cracks. From the design point of view, the reason for cracks is that the tensile ...

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Application Information

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IPC IPC(8): E04G21/00E04H4/02
Inventor 张维秀乔芳张维军姜洪波康永胜孙新张景田朱银鹰王铁红孙华张伟光彭茜朱杰
Owner JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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