Large-volume concrete pumping construction method under high-temperature condition

A technology for pumping concrete and construction methods, which is applied in infrastructure engineering, construction, etc., and can solve problems such as large quantities of concrete projects, and achieve the effects of reducing cement consumption, ensuring design strength, and reducing heat of hydration

Inactive Publication Date: 2020-01-10
SINOHYDRO BUREAU 5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete construction volume of the Sublei Hydropower Station is 185,300 cubic meters. The main pouring method is affected by the structural size of the structure, the pouring strength, and the vertical transportation distance. Pumping pouring, and the overall volume of concrete work is relatively large

Method used

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Embodiment Construction

[0023] The present invention will be further described in detail through specific embodiments below.

[0024] Difficulties in controlling the temperature of mass concrete include: 1. The characteristics of the structure are mostly pumped into the warehouse. How to meet the optimal match of concrete pumpability and slump on the basis of reducing the heat of hydration of cement; 2. Construction technology And the impact of process optimization on temperature control requires a large number of on-site test demonstrations.

[0025] The method of the invention conducts construction technology research from various processes such as raw materials, mix ratio research, horizontal transportation, vertical transportation, and maintenance, so as to control the concrete temperature and reduce defects such as cracks in the pumped concrete structure of water conservancy projects, and under the premise of ensuring the quality of the concrete. Big cost savings.

[0026] The specific method i...

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PUM

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Abstract

The invention provides a large-volume concrete pumping construction method under a high-temperature condition. The method comprises the following steps that the temperature of raw materials is controlled, so that the temperature of a machine outlet is reduced to be within a specified temperature range; the raw materials are selected, the matching ratio is optimized, and hydration heat is reduced;a reasonable concrete transportation and pouring mode is selected to reduce the pouring temperature; and the surface temperature of the concrete is lowered by using a concrete surface flowing water curing method. After the construction method is adopted, under the condition that the temperature of the outside environment is high, the temperature of large-volume concrete can be well controlled, andthe requirements for concrete storage temperature and in-bin temperature are met.

Description

technical field [0001] The invention relates to the field of concrete pouring construction, in particular to a construction method for pumping large-volume concrete under high-temperature conditions. Background technique [0002] The Soubre Hydropower Station is located in the southwest of Côte d'Ivoire, near the Nawa Falls in the middle and lower reaches of the Sassandra River. The main concrete structures of this power station include water intake, penstock, powerhouse, and spillway. The Subre Hydropower Station is located in a low latitude area, affected by the equatorial low pressure belt, and belongs to the tropical monsoon climate. Its main feature is high temperature and rainy, the annual average maximum temperature is about 32.1 ℃, a year is divided into two rainy seasons, from March to June and September to October, and the annual average rainfall is 1605mm. [0003] The main power station is equipped with 3 vertical Francis turbine generator sets with a rated out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02
CPCE02D15/02
Inventor 李世玲李德郝丽萍
Owner SINOHYDRO BUREAU 5
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