Jackstone-type rockfill concrete construction method

A technology of rock-fill concrete and construction methods, which is applied in the direction of basic structure engineering, dams, building structures, etc., can solve the problems that the construction quality is greatly disturbed by human beings, the construction procedure is complicated, and the construction speed is slow, so as to achieve easy cycle construction and simplify construction. Improvement of construction procedures and construction speed

Active Publication Date: 2009-12-16
TSINGHUA UNIV +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This method can reduce the heat of hydration to a certain extent and save material cost, but the construction procedure is complicated, the construction quality is greatly disturbed by human beings, and the construction speed is slow; with the stability of construction quality and the improvement of construction speed in modern engineering, rubble Concrete's fatal flaw is irreparable

Method used

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  • Jackstone-type rockfill concrete construction method
  • Jackstone-type rockfill concrete construction method
  • Jackstone-type rockfill concrete construction method

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Embodiment approach

[0016] The present invention is based on the prior art. Firstly, self-compacting concrete is poured into the bin, and then blocks or pebbles of various particle sizes are thrown into the self-compacting concrete. The blocks or pebbles are in the self-compacting concrete under its own weight. Medium settlement and accumulation, eventually forming a complete and dense rockfill concrete. The specific implementation can be implemented as follows:

[0017] 1) Set up templates or substitutes for the silo surface where rockfill concrete needs to be poured. 1. The template substitutes can be closed structures such as masonry walls or concrete walls with certain rigidity and strength. The silo surfaces with natural barriers do not need to be installed with templates or Substitutes: For the warehouse surface that has barriers, no formwork is required, and closed structures such as masonry walls or concrete walls can be used instead of formwork.

[0018] 2) Pouring self-compacting concrete w...

specific Embodiment

[0025] In the specific implementation, the particle size of the rockfills used varies from 4cm to 80cm. There are both blocks and pebbles in the rockfills. The grain shape is mostly massive, containing long rockfills, and the number is small. The particle size distribution is uneven. The self-compacting concrete can be poured into the injection bin by pumping, laundering, free fall, etc. After pouring the self-compacting concrete about 1m later, use dump trucks, bulldozers, excavators and other equipment to quickly remove a large number of stones Pour the self-compacting concrete evenly into the self-compacting concrete until the self-compacting concrete is filled; then continue pouring the self-compacting concrete, and then throw stones to realize the circular construction. The self-compacting concrete with a slump of 240~260mm, an expansion degree of 450~650mm, and a V-shaped funnel passing time of 20s~50s is used for pouring. The pouring method adopts pumping into the warehouse...

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Abstract

A construction method for riprap type rockfill concrete relates to a large-volume concrete construction method. The present invention adopts self-compacting concrete with superior segregation resistance and good plastic retention performance, pours it into the bin first, and then throws rocks or pebbles with a particle size greater than 4cm into the poured self-compacting concrete mechanically or manually , self-compacting concrete can fill and compact the vacancy caused by the stone settlement path at any time, and the high segregation resistance ensures that the self-compacting concrete will not segregate or bleed under the impact of stones, and finally form a dense and high-strength rockfill concrete. The method has the advantages of simple construction, significant effect in improving construction efficiency and saving construction cost, and the formed rockfill concrete has high density, less cement consumption, low hydration temperature rise, good volume stability, and excellent comprehensive performance. At the same time, it also has the advantages of energy saving, environmental protection, and easy continuous construction.

Description

Technical field [0001] The invention relates to a concrete construction method, in particular to a concrete construction method that can be used to replace various concrete and stone-masonry concrete projects during mass concrete construction. Background technique [0002] Mass concrete is a very important part of concrete engineering. In actual engineering, there are often many problems in terms of construction cost, efficiency, and temperature control. Traditional mass concrete construction methods mainly include ordinary concrete, masonry concrete and roller compacted concrete. In recent years, Professor Jin Feng, An Xuehui of Tsinghua University and others have invented the "Rockfill Concrete Dam Construction Method", with invention patent number 03102674.5. This method combines the advantages of grouted concrete and self-compacting concrete, and uses a large number of large grains. As the main filling material, large-diameter blocks or pebbles not only save the amount of con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/00E02B7/06E04G21/02
Inventor 安雪晖金峰小原孝之前田又兵卫周虎岗村甫
Owner TSINGHUA UNIV
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