Warm shed for dam concrete pouring in low-temperature season and pouring method

Abstract

The invention provides a warm shed for dam concrete pouring in a low-temperature season and a pouring method. The warm shed comprises a warm shed support capable of being heightened, a warm shed top cover, heat preservation tarpaulin and a warm air blower arranged in the warm shed. A plurality of hanging pot inlets are formed in the top of the warm shed support, and the warm shed top cover is formed by combining a plurality of sliding opening type top cover bodies installed at the hanging pot inlets; according to concrete pouring of the dam, the warm shed is erected in an area to be poured, the sliding opening type top cover at the position where the hanging tank enters is controlled to be opened to expose the opening matched with the concrete hanging tank, and the concrete hanging tank directly and vertically enters the warm shed from the top of the warm shed to be subjected to concrete pouring in a layered mode. And when pouring is conducted to the connecting position of the lower stand column support and the upper stand column support, the upper stand column support is disassembled and integrally lifted, and concrete pouring continues to be conducted by adding a section of new lower stand column support. The top cover in any area can be opened for vertical warehousing for pouring, the requirement for uniform pouring is met, and heat loss is small.

Description

technical field [0001] The invention relates to the field of dam concrete construction, in particular to a greenhouse and a pouring method for concrete pouring of dams in low temperature seasons, and the greenhouse is suitable for vertical pouring of bulk concrete for dams in low temperature seasons. Background technique [0002] The country's hydropower construction is gradually shifting to the southwestern alpine regions, where the average annual temperature is low, and the average temperature in many months throughout the year is lower than 5°C, and the temperature difference between day and night is large. In order to ensure the construction period of the project, the construction of the project inevitably needs to be carried out in the low temperature season. However, the low temperature has a great influence on the pouring of concrete that is paving the germ layer, which will cause the newly poured concrete within a certain thickness to set and harden slowly, and the s...

AI Technical Summary

Problems solved by technology

Due to the large volume of dams in water conservancy and hydropower projects, a large amount of concrete materials are consumed for large-volume concrete pouring. In order to improve construction efficiency and ensure pouring uniformity, the method of vertically pouring concrete tanks into the warehouse is commonly used; so the existing greenhouse It is not suitable for large-volume concrete pouring similar to dams, and cannot cooperate with vertical siloing of large-volume concrete pouring

[0004] In addition, the construction method of layer-by-layer pouring is commonly used for mass concrete pouring. , and then pour the next layer on the basis of the previous layer, and the volume of the existing greenhouse is fixed. If the greenhouse is set according to the overall height of the dam pouring, the volume of the greenhouse will be very large, and the pouring The space is also relatively large, and it is necessary to maintain a constant temperature environment in a large space, which consumes a lot of energy, causes waste of resources, and greatly increases construction costs; The greenhouse is disassembled and rebuilt, and its disassembly and assembly are complicated, and the greenhouse may be disassembled, resulting in too long intervals between layered pouring and lower concrete quality, which cannot be matched with layer-by-layer pouring of large-volume concrete pouring

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