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Heating maintenance method for winter construction of base layer in cold region

A cold area, grass-roots technology, applied to roads, pavement details, roads, etc., to achieve excellent results, constant temperature, and high energy utilization

Active Publication Date: 2022-04-08
CCFEB CIVIL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above problems, the present invention provides a method of heating and curing grassroots in cold areas in winter to solve the problem of maintenance in cold environments, ensure the curing effect, and make the strength of the grassroots natural Growth, reaching the set strength, improving the quality of base construction

Method used

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  • Heating maintenance method for winter construction of base layer in cold region
  • Heating maintenance method for winter construction of base layer in cold region
  • Heating maintenance method for winter construction of base layer in cold region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The winter construction heating and maintenance method for grassroots in cold regions includes the following steps:

[0052] S1. Calculation of heat loss value

[0053] Take the minimum daily average temperature T of the area where the base layer 1 to be heated and cured is located during the construction period to be heated and cured 1 As a standard, take the curing temperature T 0 and the minimum daily average temperature T 1 The difference is used as the set ambient temperature difference T 2 , it is calculated that when the surface of the base layer 1 to be heated and cured is covered with a layer of insulation layer 4, the base layer 1 to be heated and cured is set at the temperature difference T 2 The heat loss value Q per unit time and unit area below; when calculating the heat loss value, the setting of the insulation layer 4 should be consistent with the actual construction plan, usually the insulation layer 4 is usually laid with cotton quilts or straw mats; ...

Embodiment 2

[0077] Present embodiment has exemplified adopting the method of the present invention to carry out the winter period construction heating maintenance of cement stabilized crushed stone base in Xinjian Road (South Inner Ring-Xuanshi Street) and South Inner Ring (Yujing Bridge-Jianshe Road) road engineering in Gaoping City, Shanxi Province effect, as shown in the table below.

[0078] maintenance date Ambient temperature range of the day (°C) Cavity center temperature (°C) Circulating water temperature (℃) Base strength December 22 -3～10 7.2 15 / December 23 -3～5 6.5 15 / December 24 -1～3 6.1 15 / December 25 -3～4 6.1 15 / December 26 -6～3 5.5 15 / December 27 -4～7 6.1 15 / December 28 -4～10 7.3 15 / December 29 -2～11 7.5 15 3.2MPa

[0079] Note: The curing temperature is set at 5°C during the construction of the project; in the above table, the cavity center temperature is: when the r...

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Abstract

The invention provides a winter construction heating maintenance method for a base layer in a cold region. The winter construction heating maintenance method is characterized by comprising the following steps: S1, calculating a heat loss value; s2, splicing a three-order Hilbert unit tube; s3, base layer film covering, wherein after the to-be-heated and cured base layer is rolled, the surface of the to-be-heated and cured base layer is immediately covered with a layer of film; s4, a water circulation layer is laid, specifically, a plurality of third-order Hilbert unit pipes obtained in the step S2 and passing the heat preservation test are further assembled on the thin film to form the water circulation layer, and then water is added into the water circulation layer for a closed water test; s5, covering a top thermal insulation layer; after the closed water test is qualified, the water circulation layer is covered with a heat preservation layer, and the covering thickness is not smaller than the thickness of the heat preservation layer in the step S1; s6, heating equipment is installed; and S7, heating maintenance monitoring. The problem of maintenance of the base layer in the cold environment is solved, the maintenance effect is good, the strength of the base layer can be naturally increased to reach the set strength, and therefore the construction quality of the base layer can be improved.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a method for heating and maintaining grassroots during winter construction in cold regions. Background technique [0002] In the winter construction of road engineering, it is often necessary to insulate the road surface to avoid the impact of low temperature on the quality of the constructed parts. For example, in the CJJ1-2008 "Code for Construction and Quality Acceptance of Urban Road Engineering", the cement concrete pavement constructed in winter should be strengthened and maintained, covered with moisture, and the minimum temperature of the concrete surface should not be lower than 5°C. [0003] In cold regions, the temperature is low in winter, and the self-heating of hydration cannot guarantee that the temperature requirement can be met under the enhanced heat preservation. In order to ensure the temperature required by the specification, heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/06E01C11/26
Inventor 周锦俊余子维彭岸张晓进王亮
Owner CCFEB CIVIL ENG
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