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Intelligent adjusting method for temperature loads of arched concrete dam

A concrete arch, intelligent adjustment technology, applied in arch dams, dams, water conservancy projects, etc., can solve the problems of large influence on the working behavior of arch dams, and achieve the effect of improving working behavior and reducing temperature stress

Inactive Publication Date: 2016-03-23
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the temperature load has a great influence on the working performance of the arch dam, and propose a method for reducing the temperature load, which can reduce the temperature stress and improve the working performance of the dam

Method used

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  • Intelligent adjusting method for temperature loads of arched concrete dam
  • Intelligent adjusting method for temperature loads of arched concrete dam
  • Intelligent adjusting method for temperature loads of arched concrete dam

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example

[0083] Example: Arch Dam

[0084] Step 1. Calculate the average temperature load of the dam body for 12 months a year according to the design shape of the dam body, arch sealing temperature, bedrock temperature, reservoir water level and temperature, annual average ambient temperature, and light conditions. The temperature load is represented by the temperature load on the 15th of each month.

[0085] The shape of the arch dam is as figure 2 , 3 As shown, the dam height is 294.5m and the maximum bottom width is 73.12m. The icon numbers are: 1. Centerline of arch dam; 2. Dam axis; 3. Upstream contour line of dam body; 4. Bedrock excavation line upstream of dam body; 5. Thrust pier, 6. Centerline of arch crown beam, 7. induced seam.

[0086] Reservoir water temperature as Figure 4 As shown, the normal water level is 1240m.

[0087] The annual mean temperature is Figure 5 shown.

[0088] The calculated average temperature load for the first 6 months of the year is as f...

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Abstract

The invention discloses an intelligent adjusting method for temperature loads of an arched concrete dam. The method is characterized by comprising the following steps that the average temperature load of a dam body in every month is calculated; an allowed temperature load is determined, and temperature load increments, needing to be reduced, at different times and different portions are obtained; according to the allowed temperature load and the temperature load increments needing to be reduced, allowed temperatures at different times and different portions of the dam are inversely calculated; according to temperature values, needing to be reached through control, at different times and different portions and the temperature distribution condition of upstream reservoir water, by considering temperature control requirements during the operation period, the arrangement of cooling water pipes during the construction period is optimized, the cooling water pipes are reserved, and water passing temperatures and flows of the water pipes during the operation period are determined; a water fetching elevation range is determined; and water passes according to the determined water fetching elevation range, and temperature control is conducted by controlling the flows in the water pipes. According to the intelligent adjusting method, part of the cooling water pipes in the construction period are reserved, intelligent water passing is carried out during the operation period to control the temperature of the dam body, the temperature loads are reduced, and the working condition of the dam body is improved; safety stock is increased, and durability is improved.

Description

technical field [0001] The invention relates to the field of concrete arch dam construction, in particular to a method for adjusting the temperature and load of a concrete arch dam. Background technique [0002] Concrete arch dam is one of the most important dam types, which has the advantages of high economy and safety. Concrete arch dams play an important role in ensuring flood control safety, water supply safety, food safety, energy safety and ecological safety. Ensuring the safety of reservoir hydropower dams is extremely important to the country and the people. [0003] Temperature load is one of the most important loads of arch dams, which has a great influence on the stress of arch dams, especially the tensile stress. For some arch dams, such as Shanxi Hengshan Arch Dam and Inner Mongolia Xiangshui Arch Dam, the influence of temperature load on arch dam stress and arch end thrust exceeds 80% of the total load, which has a huge impact on the working performance of arc...

Claims

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Application Information

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IPC IPC(8): E02B1/00E02B7/12
CPCE02B1/00E02B7/12
Inventor 张国新高安泽周秋景刘毅
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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