Jackstone-type rockfill concrete construction method

A technology of rockfill concrete and construction methods, which is applied in the direction of infrastructure engineering, dams, building structures, etc., can solve problems such as slow construction speed, complicated construction procedures, and large construction quality due to human interference, so as to improve construction speed and simplify construction. Construction procedure, effect of easy cycle construction

Active Publication Date: 2008-03-19
TSINGHUA UNIV +1
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  • Abstract
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  • Claims
  • 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

Examples

Experimental program
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Effect test

Embodiment approach

[0016] The present invention is based on the prior art, pouring self-compacting concrete into the bin first, and then throwing stones or pebbles of various particle sizes into the self-compacting concrete, and the blocks or pebbles are placed in the self-compacting concrete under the action of self-weight Settling and accumulating in the middle, finally forming a complete and dense rockfill concrete. The specific implementation method can be implemented in the following steps:

[0017] 1) Set formwork or substitutes 1 for the warehouse surface where rockfill concrete needs to be poured. The formwork substitutes can be closed structures such as masonry walls or concrete walls with certain rigidity and strength. The warehouse surface with natural barriers does not need to be provided with formwork or Alternatives: Formwork may not be set for the warehouse surface that already has barriers, and closed structures such as masonry walls or concrete walls may also be used instead of ...

specific Embodiment

[0025] In the specific implementation, the particle size of the used rockfill ranges from 4cm to 80cm. There are both block stones and pebbles in the rockfill. The particle size distribution is not uniform. Self-compacting concrete can be poured into the silo by pumping, laundering, free fall, etc. After pouring about 1m of self-compacting concrete, use dump trucks, bulldozers, excavators, etc. Throw evenly into the self-compacting concrete until the self-compacting concrete is filled; then continue to pour self-compacting concrete, and then throw stones to realize cycle construction. Self-compacting concrete with a slump of 240-260mm, expansion 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, hanging tank into the warehouse, and slipping There are various forms such as warehousing, backhoe warehousing and so on. The formed rock-fill concrete was tested by cutting observation, core drilling,...

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Abstract

The present invention discloses a riprap rock-fill concrete construction method, which relates to a construction method for the large volume concrete. The present invention adopts self-compacting concrete having superior anti-segregation performance and good plasticity-retention performance, and firstly the concrete is poured into a bin, and then block stones or pebbles with the particle size smaller than 4 cm are poured into the poured self-compacting concrete in a mechanical way or a manual way, and the self-compacting concrete can fill up and compact the vacancies caused in the block stone settlement path at any time, the high anti-segregation performance ensures that the self-compacting concrete does not segregate and bleed water under the impact of the block stones, and finally the self-compacted rock-fill concrete with high intensity is formed. The method has the advantages that the construction is convenient, and the present invention has significant effects on the aspects of improving the construction efficiency and saving the construction cost, and the rock-fill concrete formed has high degree of compaction, the cement used is less, the hydration temperature rise is low, the volume stability is good, and the comprehensive performance is excellent, meanwhile, the present invention also has the advantages of energy-saving, environmental protection and being easy for continuous construction.

Description

technical field [0001] The invention relates to a concrete construction method, in particular to a concrete construction method which can be used to replace various concrete and masonry concrete projects during large-volume 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 and Professor An Xuehui of Tsinghua University invented the "Construction Method of Rockfill Concrete Dam", the invention patent number is 03102674.5. This method combines the advantages of grouted concrete and self-compacting concrete, and uses a large number of large The use of large-diameter stones or pebbles as the main filling material not only saves the...

Claims

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Application Information

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Patent Type & Authority Applications(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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