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The construction method of pouring dam concrete with the tower belt machine

A construction method and concrete technology, which is applied in construction, infrastructure engineering, etc., can solve problems such as large temperature rise and separation of concrete aggregates, and achieve the effects of improving success rate, preventing impact, and reducing time and cost

Inactive Publication Date: 2019-01-22
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems, such as the temperature rise of the pre-cooled concrete during transportation, and the separation of concrete aggregates is more likely to occur when the control is improper. A series of measures have been taken to address the causes of the problems during construction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Use tower belt machine to pour dam concrete Construction method:

[0016] 1) After the tower belt conveyor is arranged according to the construction drawings, the raw materials are prepared according to the concrete ratio. The raw materials include cement, aggregate, sand, coal ash powder and water. The ratio is: Cement: 300kg / m 3 , aggregate 0.48kg / m 3 , Aggregate includes coarse aggregate and fine aggregate, (coarse aggregate: particle size 4.5-5.5cm; fine aggregate particle size: 2.6±0.2cm), sand 0.82kg / m 3 , first grade coal powder 0.18kg / m 3 , the moisture content is lower than 6%, and the slump is controlled to 3-5cm;

[0017] 2) The above raw materials are added to the mixing building for mixing. The mixing building is a pre-cooling mixing building with sandwich color steel plates on the outside. Rubber and plastic insulation boards are attached to the outer wall of the aggregate for heat preservation. The temperature at the outlet is controlled a...

Embodiment 2

[0023] Embodiment 2: Use tower belt machine to pour dam concrete Construction method:

[0024] 1) After the tower belt conveyor is arranged according to the construction drawings, the raw materials are prepared according to the concrete ratio. The raw materials include cement, aggregate, sand, coal ash powder and water. The ratio is: Cement: 280kg / m 3 , aggregate 0.49kg / m 3 , Aggregate includes coarse aggregate and fine aggregate, (coarse aggregate: particle size 4.5-5.5cm; fine aggregate particle size: 2.6±0.2cm), sand 0.82kg / m 3 , first grade coal powder 0.15-0.20kg / m 3 , the moisture content is lower than 6%, and the slump is controlled to 3-5cm;

[0025] 2) The above raw materials are added to the mixing building for mixing. The mixing building is a pre-cooling mixing building with sandwich color steel plates on the outside. Rubber and plastic insulation boards are attached to the outer wall of the aggregate for heat preservation. The temperature at the outlet is control...

Embodiment 3

[0030] Embodiment 3: Use tower belt machine to pour dam concrete Construction method:

[0031] 1) After the tower belt conveyor is arranged according to the construction drawings, the raw materials are prepared according to the concrete ratio. The raw materials include cement, aggregate, sand, coal ash powder and water. The ratio is: Cement: 350kg / m 3 , aggregate 0.51kg / m 3 , Aggregate includes coarse aggregate and fine aggregate, (coarse aggregate: particle size 4.5-5.5cm; fine aggregate particle size: 2.6±0.2cm), sand 0.82kg / m 3 , first grade coal powder 0.18kg / m 3 , the moisture content is lower than 6%, and the slump is controlled to 3-5cm;

[0032] 2) The above raw materials are added to the mixing building for mixing. The mixing building is a pre-cooling mixing building with sandwich color steel plates on the outside. Rubber and plastic insulation boards are attached to the outer wall of the aggregate for heat preservation. The temperature at the outlet is controlled a...

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Abstract

The invention provides a construction method for pouring dam concrete with a tower belt conveyor. The steps include: (1) after arranging the tower belt conveyor according to the construction drawings, prepare raw materials according to the concrete ratio, and the raw materials include cement, aggregate, sand and coal ash Powder and water, and control the slump of 3-5cm; (2) The above raw materials are added to the mixing building for mixing, and the concrete from the outlet of the mixing building is transported to the transfer platform of the tower belt conveyor through the feeding line. The cloth belt conveyor is transported to the outer cloth belt conveyor chute and enters the warehouse. (3) The laying method is used for pouring, and the self-distributing function of the tower belt machine is used for pouring; the combination of high-power vibrating arm and hand-held vibrating rod is adopted, and the vibrating rod is arranged in a plum blossom shape; (4) Construction joint treatment ; (5) Concrete curing. The invention solves the problem of large-volume dam concrete pouring, improves the success rate, reduces the time and cost of later repair and maintenance, and adopts pre-cooling and thermal insulation measures to prevent the influence of temperature on concrete pouring.

Description

technical field [0001] The invention belongs to the field of engineering construction, and in particular relates to a construction method for pouring dam concrete with a tower belt machine. Background technique [0002] The tower belt conveyor is a special equipment for dam concrete pouring developed by ROTEC in the United States. It consists of a tower crane, a concrete distributing belt conveyor, a distributing belt conveyor climbing mechanism and a manned lifting mechanism. It integrates the functions of concrete horizontal transportation, vertical transportation and warehouse surface distribution, and has strong concrete pouring ability. The combination of the tower belt conveyor and the concrete supply line realizes the continuous, uniform and efficient factory-like operation of concrete from the mixing building to the warehouse surface, improves the quality of concrete transportation, and makes it a great development in the concrete pouring of dams . [0003] The tow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/02
CPCE02D15/02
Inventor 马文亮
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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