A roller compacted concrete dam and its construction method

Abstract

A roller compacted concrete dam and a construction method therefor. The roller compacted concrete dam comprises a dam body upstream water face area (5), a dam body internal area (6), and a dam body downstream face area (7). The dam body upstream water face area uses low-plasticity and low-hydration heat high-graded concrete, the dam body internal area uses three-graded roller compacted concrete, and the dam body downstream face area uses distorted concrete. All the concretes are mixed with a hydration heat inhibitor. The construction method comprises a production, transport and paving of concrete, rolling construction using a thick layer rolling construction technology and comprehensive temperature control measures, and dam body slotting.

Description

technical field [0001] The invention relates to the field of roller compacted concrete dam building, in particular to a roller compacted concrete dam and a construction method thereof. Background technique [0002] Roller compacted concrete dam is a new dam-building technology developed in recent decades. It is a concrete dam constructed by earth-rock dam technology. It not only has the characteristics of rapid construction of earth-rock dams, but also has the strength and durability of concrete dams. Unlike general concrete dams, which use a vibrator to insert and vibrate compactly, roller compacted concrete is a new concrete construction method that uses earth-rock dam construction equipment to vibrate dry hard concrete without slump. [0003] At present, the domestic RCC dam body material division is generally divided into four areas, such as figure 1 Shown: Metamorphic concrete area 1 on the upstream surface, anti-seepage area 2 of the second-level RCC upstream, third-g...

AI Technical Summary

Problems solved by technology

During the construction of the roller compacted concrete dam, the temperature difference between the inside and outside of the roller compacted concrete dam and the temperature difference between the upper and lower layers will cause cracks and damage the stability and durability of the dam.

At present, almost all methods are used in the temperature control measures of dam concrete, such as aggregate precooling, adding ice, water cooling, adding water and lightly burning MgO expansion agent, etc. These temperature control measures are cumbersome and ineffective Good, poor economy, did not give full play to the advantages of rapid dam construction and cost saving of RCC

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