Determination method of water cooling control curve during the construction period of concrete arch dam
A technology for water cooling and curve control, which is applied to arch dams, dams, design optimization/simulation, etc. It can solve the problems of easy temperature rise, three-stage stress and large fluctuation of safety factor, etc., so as to avoid temperature rise and benefit Temperature control and anti-crack control to maintain the effect of basic stability
Active Publication Date: 2021-02-12
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Aiming at the deficiencies in the above-mentioned water cooling control curve, the present invention provides a practical water cooling control curve that is easy to realize intelligent control, and solves the problems of the existing three-stage stress and safety factor with large fluctuations and easy temperature rise.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and the functions, methods, or structural equivalent transformations or transformations made by those skilled in the art according to these embodiments Alternatives all fall within the protection scope of the present invention.
[0018] This concrete temperature control curve is based on the specifications and existing practical experience to determine the cooling time and anti-cracking safety factor;
[0019] The cooling time is generally between 90 and 120 days, which is determined according to the progress of dam concrete pouring and arch sealing. It can be shortened to about 50d in some dam sections, and may be extended to about 200d in the restricted area at the bottom of the dam body;
[0020] The anti-cracking safety factor is taken as 2.0 at the early age, that is, at t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of dam safety control, and specifically relates to a method for determining a water cooling control curve during the construction period of a concrete arch dam. The realization steps are: determining the cooling time of the pouring silo; The ratio of strength to stress at the target temperature stage is a fixed value or linearly adjusted, and this value needs to meet the requirements of the specification; the simulation method is used to calculate the temperature change curve of the dam according to the stress curve, and the curve ensures that the ratio of strength to stress is constant or changes linearly during the cooling process ; Using this curve, combined with intelligent water flow, realizes intelligent temperature control. The invention avoids the phenomenon of temperature rise in the stage of water cutoff caused by the current three-stage water supply mode, and at the same time reduces the fluctuation degree of concrete temperature stress and anti-cracking safety factor, which is beneficial to temperature control and anti-cracking control.
Description
technical field [0001] The invention belongs to the technical field of dam safety control, and in particular relates to a method for determining a water cooling control curve during the construction period of a concrete arch dam. Background technique [0002] Temperature control and crack prevention are important tasks in the construction of arch dams, which are mainly realized through various temperature control measures. Temperature control measures include concrete pre-cooling, surface insulation, water cooling and other methods. The pre-cooling of concrete refers to cooling one or several materials in the concrete raw materials, thereby reducing the pouring temperature and then reducing the maximum temperature of the dam. When the sealing arch temperature is constant, the temperature load and temperature stress are correspondingly reduced. There are three main methods for concrete precooling: water cooling, air cooling, and vacuum vaporization. Surface insulation is an...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23E02B7/12C04B40/00G06F111/04G06F111/10G06F119/08
CPCE02B7/12C04B40/0075G06F30/23
Inventor 周秋景赵泽湖张国新刘毅程恒刘有志雷峥琦邱永荣徐秀鸣杨波金鑫鑫刘瑞强江晨芳吴龙珅张家豪高宇欣
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES