CN212388473U

CN212388473U - A dam temperature control structure system in severe cold area

Info

Publication number: CN212388473U
Application number: CN202021180277.4U
Authority: CN
Inventors: 王一帆; 康飞; 赵文超; 赵思曾
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-01-22
Anticipated expiration: 2030-06-23

Abstract

A dam temperature control structure system in a severe cold area, a concrete dam, insulation materials on the upper, downstream sides and top of the concrete dam, a solar heating panel is arranged on the downstream side of the concrete dam, a water heater is arranged inside the concrete dam, and the water heater is connected to the solar heating panel through a hot water pipe. Connection, the hot water generated by the solar heating panel is transported to the heating and insulating water pipe through the sewer pipe, and is connected to the water heater through the surface water intake pipe, and the high-temperature surface water in summer is transported to the heating and insulating water pipe through the sewer pipe to maintain the concrete dam. Stabilize the temperature field to prevent the temperature field of the dam foundation from affecting the stable temperature field of the concrete dam. The structural system makes full use of the strong sunlight in the severe cold area, uses the solar water heater to heat up the temperature through the hot water of the solar water heater, improves the stable temperature field of the dam body, simplifies the temperature control procedure, speeds up the construction progress, and effectively controls the dam body temperature of the concrete dam. Thereby reducing or preventing the possibility of cracks or even water leakage in the concrete dam, and ensuring the safety of the dam body.

Description

Temperature control structure system for dam body in severe cold region

Technical Field

The utility model relates to a severe cold district dam body control by temperature change structural system mainly used control concrete dam's dam body temperature, reduce or prevent dam body fracture.

Background

Temperature control of concrete dams in severe cold regions is always the most difficult in the construction process of the concrete dams, cracks are generated although multiple engineering measures are adopted, and potential safety hazards are brought to engineering. Cracks appear due to severe weather conditions- "cold, hot, wind, dry". The cold is that the average temperature per year in a severe cold area is very low, the average temperature per month in winter is below-10 ℃, the cold tide is frequent all the year round, and the temperature difference between day and night is large; "Hot" means that the temperature is high in summer, and the average temperature is about 20 ℃ in summer; wind refers to severe cold areas with strong wind power, strong wind speed and easy evaporation of water; the term "dry" refers to the climate dryness in spring and autumn in alpine regions, and these climate characteristics are extremely unfavorable for the temperature control and crack prevention of roller compacted concrete. The stable temperature of the dam body is low due to low annual average temperature, and the highest temperature of concrete poured in summer is high, so that the temperature difference of the dam foundation is large (often exceeding the specification), and foundation penetrating cracks are often generated due to large temperature difference of the foundation; the cold tide is frequent all the year round, the temperature difference between day and night is large, and the concrete poured first and the concrete poured later form large temperature difference due to the existence of the intermission period, so that horizontal cracks appear, and the water leakage of the dam body is further caused. Research shows that the tensile strength between horizontal layers is only 41-86% of that of the original concrete, so that the horizontal cracking phenomenon is easy to form. In engineering practice, the upper static dam, the Japanese Yuchuan dam, the Liaoning Guanyin Ge dam, the Songyue dam, the Manchu terrace dam, the Hebei Tao Lin mouth dam, the Iris estuary dam, the Xinjiang Duoli dam and the like of the United states have horizontal cracks, which cause water leakage of the dam body, and the horizontal cracks are all caused by the lower stable temperature field of the dam body in a severe cold area, so that the highest temperature rise of the dam body is reduced by a large amount of temperature control measures in the actual construction process, for example, cooling water comprises first-stage, second-stage or even third-stage cooling water, an ice making station is adopted for making ice, then the ice is added for mixing aggregate, and the like, the cost is high, the construction process is complex, and the cracks are generated on the dam body by carelessness as mentioned above, and the principle is as follows:

temperature stress delta_{Temperature of}＝E·α·β·R·Δt≤1.2[δ_{Allow for}]. To reduce delta_{Temperature of}Where E, α, β, R are all constant values, therefore Δ t needs to be reduced. According to the formula, Δ T ═ T_max-T_StableIn the engineering construction process, T should be controlled as much as possible_maxHowever, the cost is large, and the cost comprises low-heating cement, ice adding, cold water adding, pre-cooling aggregate mixing concrete and introducing cooling water (first stage, second stage and even third stage) to reduce the delta t, so the investment is large. In addition, in high-temperature seasons, the slightly-careless delta T can exceed the standard, and the concrete cracks due to the fact that the temperature stress is larger than the allowable stress, so that the T is needed_StableTo start, increase T_StableFurther, smaller Δ t makes δ_{Temperature of}Reducing and satisfying the requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a severe cold area dam body control by temperature change structural system is provided.

In order to solve the technical problem, the utility model discloses a technical scheme is: the dam body is added with the following structure or equipment, which comprises a solar heating plate, a water heater connected with the solar heating plate, a dam body heat-insulating layer and heat-insulating temperature-rising hot water pipes (with the interval of 1m multiplied by 1m), so that the heat transfer between the concrete dam body and the bedrock is isolated, and the higher stable temperature field of the dam body of the concrete dam is maintained.

The temperature control structure system for the dam body in the severe cold region comprises a concrete dam 6 and heat insulation layers 5 arranged on the upper side surface, the lower side surface and the upper surface of the concrete dam 6, wherein solar heating plates 1 are arranged on the lower side surface of the concrete dam 6 and outside the heat insulation layers 5, a water heater 3 is arranged inside the concrete dam 6, and the water heater 3 is connected with the solar heating plates 1 through a hot water pipe 2; the water heater 3 is connected with a heating heat insulation water pipe 8 through a sewer pipeline 7, and hot water generated by the solar heating panel 1 is conveyed to the heating heat insulation water pipe 8 through the sewer pipeline 7; the surface layer water intake pipe 4 is connected with the water heater 3, and high-temperature water 10 on the surface layer in summer is conveyed to the heating heat insulation water pipe 8 through the sewer pipeline 7 to maintain the stable temperature field of the concrete dam 6 and prevent the temperature field of the dam foundation 9 from influencing the stable temperature field of the concrete dam 6.

The utility model has the advantages that: the strong illumination of severe cold regions is fully utilized, the solar water heater is utilized, and the hot water of the solar water heater is used for heating the T_StableThe temperature is maintained at 25-30 ℃, so that the delta t meets the requirement and the delta is ensured_{Temperature of}≤[δ_{Allow for}]δ_{Temperature of}≤[δ_{Allow for}]. The structural system heats up through hot water of the solar water heater, improves the stable temperature field of the dam body, simplifies temperature control procedures, accelerates construction progress, effectively controls the temperature of the dam body of the concrete dam, thereby reducing or preventing the possibility that the concrete dam cracks or even leaks water, and ensuring the safety of the dam body

Drawings

Fig. 1 is a temperature control structure system diagram of the dam body in severe cold region of the present invention.

In the figure: 1, a solar heating plate; 2, a hot water pipe; 3, a water heater; 4, a surface water taking pipe; 5, insulating layer; 6, concrete dam; 7, a water discharging pipeline; 8, heating up the heat insulation water pipe; 9, dam foundation; 10 summer surface layer high temperature water.

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

as shown in fig. 1, the utility model relates to a severe cold district dam body temperature control structure system, including concrete dam 6, on concrete dam 6, the heat preservation 5 at downstream side and top, 6 downstream sides of concrete dam set up solar heating panel 1, the inside water heater 3 that sets up of concrete dam 6, water heater 3 passes through hot-water line 2 and solar heating panel 1 couples, the hot water that produces solar heating panel 1 carries the thermal-insulated water pipe 8 that heaies up through sewer pipe 7, link to each other with water heater 3 through top layer intake pipe 4, carry the thermal-insulated water pipe 8 that heaies up through sewer pipe 7 with surface course high temperature water 10 in summer, maintain the stable temperature field of concrete dam 6, avoid dam foundation 9 temperature field to influence the stable temperature field of concrete dam 6.

The material of the heat-insulating layer 5 can be, but is not limited to, heat-insulating layers such as polyurethane foam, polystyrene board and foam concrete;

the arrangement area of the solar heating panel 1 is calculated according to the stable temperature field of the concrete dam 6;

the heating heat insulation water pipe 8 is made of but not limited to a pvc plastic pipe;

the row spacing between the temperature-rising heat-insulation water pipes 8 is 1.5m multiplied by 1.5m, and 2-3 layers are arranged along the vertical direction of the concrete dam 6;

the surface layer water taking pipe 4 is used for taking high-temperature water 10 on the surface layer in summer so as to overhaul the solar heating panel 1;

when the method is implemented specifically, the method comprises the following steps:

the heat-insulating layers are arranged on the upstream side and the downstream side of the concrete dam body and on the top of the dam body and are used for isolating the dam body from heat exchange with the outside, and the heat-insulating effect is achieved. Then, a solar heating plate is arranged on the downstream side of the dam body, intense illumination of severe cold areas is fully utilized, a temperature field of the concrete dam is kept by hot water of the solar water heater through the solar water heater by using the solar water heater, influence of a low-temperature field of the dam foundation is avoided, a stable temperature field of the concrete dam body is kept at a high temperature, and generally T is set_StableThe temperature is maintained at 22-25 ℃, so that the delta t meets the requirement and the delta is ensured_{Temperature of}≤[δ_{Allow for}]δ_{Temperature of}≤[δ_{Allow for}]。

The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, the scope of the present invention should not be limited by the embodiment, that is, all equivalent changes or modifications made by the spirit of the present invention should still fall within the scope of the present invention.

Claims

1. a dam temperature control structure system in severe cold area, it is characterized in that, this severe cold area dam temperature control structure system comprises concrete dam (6), is arranged on the thermal insulation layer of concrete dam (6) upper, downstream side and upper surface (5), a solar heating panel (1) is provided on the downstream side of the concrete dam (6) and outside the thermal insulation layer (5), a water heater (3) is provided inside the concrete dam (6), and the water heater (3) passes through the hot water pipe (2). ) is connected with the solar heating panel (1); the water heater (3) is connected with the heating and heat insulating water pipe (8) through the sewer pipeline (7), and the hot water generated by the solar heating panel (1) is transported to the water heater through the sewer pipeline (7). The heating and thermal insulation water pipe (8); the surface water intake pipe (4) is connected to the water heater (3), and the high temperature water (10) on the surface layer in summer is transported to the heating and thermal insulation water pipe (8) through the sewer pipeline (7) to maintain the concrete dam (6) to avoid the temperature field of the dam foundation (9) from affecting the stable temperature field of the concrete dam (6).

2 . The temperature control structure system for a dam in severe cold regions according to claim 1 , wherein the material of the thermal insulation layer ( 5 ) is polyurethane foam, polystyrene board or foamed concrete. 3 .

3. A dam temperature control structure system according to claim 1 or 2, characterized in that, the arrangement area of the solar heating plate (1) is calculated according to the stable temperature field of the concrete dam (6).

4. A dam temperature control structure system in severe cold regions according to claim 1 or 2, characterized in that, the temperature-raising and heat-insulating water pipe (8) is made of pvc plastic pipe.

5. A dam temperature control structure system in a severe cold area according to claim 3, characterized in that, the material of the temperature-raising and heat-insulating water pipe (8) is a pvc plastic pipe.

6. A dam temperature control structure system according to claim 1, 2 or 5, characterized in that the row spacing between the temperature-raising and heat-insulating water pipes (8) is 1.5m×1.5m, along the The concrete dam (6) is vertically arranged with 2 to 3 layers.

7. A dam temperature control structure system in a severe cold region according to claim 3, characterized in that, the row spacing between the temperature-raising and heat-insulating water pipes (8) is 1.5m×1.5m, and the distance between the temperature-raising and heat-insulating water pipes (8) is 1.5m×1.5m, along the concrete dam (6). ) 2 to 3 layers in the vertical direction.

8. A dam temperature control structure system in a severe cold area according to claim 4, characterized in that the row spacing between the temperature-raising and heat-insulating water pipes (8) is 1.5m×1.5m, along the concrete dam (6). ) 2 to 3 layers in the vertical direction.