CN111074745A - Concrete box structure for preventing solar radiation energy and bridge box - Google Patents
Concrete box structure for preventing solar radiation energy and bridge box Download PDFInfo
- Publication number
- CN111074745A CN111074745A CN201911386750.6A CN201911386750A CN111074745A CN 111074745 A CN111074745 A CN 111074745A CN 201911386750 A CN201911386750 A CN 201911386750A CN 111074745 A CN111074745 A CN 111074745A
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- pipeline
- concrete
- solar radiation
- box structure
- spiral
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- 230000005855 radiation Effects 0.000 title claims abstract description 30
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000000034 method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000112598 Pseudoblennius percoides Species 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0075—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a decrease in temperature
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to the technical field of concrete boxes, and particularly discloses a solar radiation energy prevention concrete box structure and a bridge box, wherein the concrete box structure comprises a concrete matrix and a circulating pipeline; the concrete matrix is of a cuboid structure; the circulating pipeline comprises a spiral pipeline and a linear pipeline, and the spiral pipeline is arranged in the side wall of the concrete matrix; one end of the linear pipeline is connected with the head end of the spiral pipeline, and the other end of the linear pipeline is connected with the tail end of the spiral pipeline, so that the spiral pipeline and the linear pipeline are connected into a closed loop; a liquid inlet, an air outlet and a pipeline pressure regulating valve are arranged on the circulating pipeline, and valves are respectively arranged on the liquid inlet and the air outlet; and cooling water is injected into the circulating pipeline. The concrete box structure can effectively reduce the temperature difference of the box structure, particularly different positions on mass concrete, and avoid cracking or damage of the structure body due to overlarge local temperature difference stress.
Description
Technical Field
The invention relates to the technical field of concrete boxes, in particular to a solar radiation energy preventing concrete box structure and a bridge box.
Background
The box structure is a common mass concrete structure in constructional engineering. Due to the advantages of large torsional rigidity, uniform internal force distribution and the like, the composite material is widely applied to bridge structures, such as main beams of continuous rigid frame bridges, cable towers of cable-stayed bridges and suspension bridges, piers of long-span bridges and the like. Because the box girder suffers the direct irradiation of solar radiant energy in the bridge work, and the heat conduction performance of the concrete is poor, the surface temperature change of the box girder structure is fast, the internal temperature change is slow, the box girder is mass concrete, and the internal and external temperature difference is larger. Therefore, the box girder often generates temperature stress due to overlarge temperature difference between the inside and the outside, so that the surface of the box girder is cracked, the integrity and the durability of the structure are seriously influenced, the service life of the structure is damaged, and even disasters can be caused in serious conditions.
Most of the prior art carries out cooling treatment by continuously introducing water through a pre-embedded cooling water pipe in the concrete pouring process; or the structural steel bars, the measure steel bars and the external exposed steel bars in the mass concrete form a cooling and heat dissipation system for passive 'overflow' cooling. However, the cooling water pipes are embedded in advance, the method is only aimed at the process of pouring and forming concrete, no relevant measures are needed in the working state of a subsequent box body structure, water is continuously supplied for 15-18 days in the cooling process, and manpower and material resources are wasted. The passive 'overflow' cooling system is similar to the former, is aimed at the concrete pouring and forming process, and has a lower cooling rate.
Disclosure of Invention
The invention aims to provide a concrete box structure for preventing solar radiation energy and a bridge box, which effectively reduce the temperature difference of different positions on the box structure, particularly large-volume concrete, and avoid cracking or damage of the structure body due to overlarge local temperature difference stress.
In order to solve the technical problems, the invention provides a concrete box structure for preventing solar radiation energy and a bridge box, which comprise a concrete matrix and a circulating pipeline;
the concrete matrix is of a cuboid structure;
the circulating pipeline comprises a spiral pipeline and a linear pipeline, and the spiral pipeline is arranged in the side wall of the concrete matrix; one end of the linear pipeline is connected with the head end of the spiral pipeline, and the other end of the linear pipeline is connected with the tail end of the spiral pipeline, so that the spiral pipeline and the linear pipeline are connected into a closed loop;
a liquid inlet, an air outlet and a pipeline pressure regulating valve are arranged on the circulating pipeline, and valves are respectively arranged on the liquid inlet and the air outlet;
and cooling water is injected into the circulating pipeline.
Preferably, the circulation pipeline is provided with a detection port, and the detection port is provided with a pressure gauge.
As a preferred scheme, the liquid inlet is arranged at one end of the spiral pipeline.
Preferably, the exhaust port is disposed at the other end of the spiral pipeline.
Preferably, the liquid inlet extends in a direction perpendicular to the side surface of the concrete matrix.
Preferably, the exhaust port extends in a direction perpendicular to a side surface of the concrete base.
Preferably, the pressure in the circulation line is 10 kPa.
Preferably, the spiral pipeline is a square spiral pipeline.
Preferably, the straight line pipe is located on a central axis of the spiral pipe.
Preferably, the solar radiation energy-proof concrete box structure comprises a plurality of solar radiation energy-proof concrete box structures, and the central shafts of the plurality of concrete box structures are positioned on the same horizontal line.
The invention has the following beneficial effects:
the solar radiation energy preventing concrete box body structure and the bridge box body can not only cool in the concrete pouring and forming stage, but also solve the problems that the box body structure and the bridge box body are subjected to solar radiation energy during working operation to cause the increase of the internal and external temperature difference and generate temperature stress to aggravate concrete cracks. The temperature difference of different positions on the structure, particularly large-volume concrete, can be effectively reduced, and the cracking or the damage of the structure due to overlarge local temperature difference stress is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a concrete box structure for preventing solar radiation energy provided by an embodiment of the invention.
Reference numerals: 1. a concrete matrix; 2. a spiral pipeline; 3. a linear pipeline; 4. a liquid inlet; 5. an exhaust port; 6. and (6) a detection port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a concrete box structure and a bridge box for preventing solar radiation energy in the preferred embodiment of the invention comprises a concrete matrix 1 and a circulating pipeline;
the concrete matrix 1 is of a cuboid structure;
the circulating pipeline comprises a spiral pipeline 2 and a linear pipeline 3, and the spiral pipeline 2 is arranged in the side wall of the concrete matrix 1; one end of the linear pipeline 3 is connected with the head end of the spiral pipeline 2, and the other end of the linear pipeline 3 is connected with the tail end of the spiral pipeline 2, so that the spiral pipeline 2 and the linear pipeline 3 are connected into a closed loop;
a liquid inlet 4, an air outlet 5 and a pipeline pressure regulating valve are arranged on the circulating pipeline, and valves are respectively arranged on the liquid inlet 4 and the air outlet 5;
and cooling water is injected into the circulating pipeline.
The principle of the preferred embodiment of the invention is as follows: by arranging a circulating pipeline in the concrete matrix 1 and injecting cooling water into the circulating pipeline, the circulating pipeline and the surrounding concrete matrix 1 structure substantially form a heat exchanger, and the cooling water is equivalent to a heat exchange medium; because the two states of water, namely the liquid state and the gaseous state, have better fluidity, the temperature of the cooling water at different positions in the circulating pipeline is basically the same under the condition that the temperature difference of different positions on the concrete matrix 1 is not large. When the local temperature on the concrete matrix 1 changes, the heat exchange between the concrete at the corresponding position and the cooling water in the circulating pipeline occurs, and because the air pressure in the circulating pipeline is set in advance, the water can be vaporized only at a certain temperature, and the vaporization of the water is a heat absorption process, the heat at the position with the overhigh temperature in the concrete matrix 1 can be absorbed, and then the heat is conveyed to the position with lower temperature at the other side by flowing in the circulating pipeline, and the system is recyclable because the water is in a flowing state. Thereby make the temperature difference less in the box structure, indirectly just play dispersion and alleviating the effect to the temperature difference stress, can effectively avoid the local great temperature difference stress that appears of base member, played the guard action to the structure.
For example, when the tank structure is in an operating state, the air pressure in the circulation line is set to 10 kpa; the solar radiation energy cannot directly irradiate two opposite sides of the box girder at the same time, for example, when the sun rises from the east in the morning, the east side of the box girder is directly irradiated by the corresponding solar radiation energy, and the west side is not directly irradiated by the solar radiation energy, so that the temperature of the east side concrete of the box girder is theoretically higher than that of the west side, and when the temperature of the east side concrete reaches the boiling point of water under the air pressure of 10kpa, namely 45 ℃, heat exchange can be generated between the concrete at the corresponding position and the water in the liquid storage pipeline, so that the heat is transferred from the high-temperature area on the box body to the low-temperature area, and the temperature difference between different positions on the matrix is reduced; during the period from afternoon to evening, the solar radiation energy directly irradiates the west side of the box girder, and the east side is not directly irradiated, so that the reaction principle is consistent with the principle.
Therefore, the concrete box structure of the preferred embodiment of the invention not only can be cooled in the concrete pouring and forming stage, but also can solve the problems that the box structure and the bridge box body are subjected to solar radiation energy during working operation to cause the increase of the internal and external temperature difference and generate temperature stress to aggravate concrete cracks. Can effectively reduce the temperature difference of different positions on the structure body, particularly large-volume concrete, and avoid the cracking or damage of the structure body caused by overlarge local temperature difference stress
In the preferred embodiment of the present invention, the circulation pipeline is provided with a detection port 6, and the detection port 6 is provided with a pressure gauge.
Specifically, because water is when being turned into the gaseous phase by the liquid phase, the volume can expand, and after water filling, the stock solution pipeline is in the encapsulated situation again, consequently need consider pressure allowance for the phase transition of water, has set up the pressure gauge after, can carry out real-time supervision to the pressure in the stock solution pipeline when filling water to the filling volume of control water.
In the preferred embodiment of the present invention, the liquid inlet 4 is disposed at one end of the spiral pipeline 2.
In the preferred embodiment of the present invention, the exhaust port 5 is provided at the other end of the spiral pipe 2.
In the preferred embodiment of the present invention, the liquid inlet 4 extends in a direction perpendicular to the side surface of the concrete base 1.
In the preferred embodiment of the present invention, the exhaust port 5 extends in a direction perpendicular to the side surface of the concrete base 1.
In a preferred embodiment of the invention, the gas pressure in the circulation line is 10 kPa.
In the preferred embodiment of the present invention, the spiral pipeline 2 is a square spiral pipeline 2.
Specifically, because the cross-section of the box structure is rectangular, the square spiral pipeline 2 can better adapt to the cross-sectional shape of the box structure, and the square spiral is also convenient to process and install.
In the preferred embodiment of the present invention, the straight line pipe 3 is located on the central axis of the spiral pipe 2.
Specifically, the straight line pipe 3 passes through the middle of the spiral pipe 2, and the heat exchange area between the circulating pipe and the surrounding structure can be further expanded.
In a preferred embodiment of the present invention, the solar radiation protection system comprises a plurality of concrete box structures for protecting solar radiation as described above, and the central axes of the plurality of concrete box structures are located on the same horizontal line.
It is worth explaining, can prefabricate many pipelines according to the structure size for subsequent use earlier, when specifically laying, after the structure arrangement of reinforcement is accomplished, connect many pipelines into the heliciform and place in the framework of steel reinforcement of structure through the joint, then pour in the structure with the framework of steel reinforcement together.
In addition, the circulating pipeline comprises water in various air pressure states, the boiling points of the water under different pressures are different, and the air pressure in the liquid storage pipeline can be adjusted according to actual requirements, so that the water is vaporized and liquefied at different temperatures, and the heat absorption and the heat release are realized. At the same time, different low-boiling phase change substances can be used instead of water.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a prevent concrete box structure of solar radiation energy which characterized in that: comprises a concrete matrix and a circulating pipeline;
the concrete matrix is of a cuboid structure;
the circulating pipeline comprises a spiral pipeline and a linear pipeline, and the spiral pipeline is arranged in the side wall of the concrete matrix; one end of the linear pipeline is connected with the head end of the spiral pipeline, and the other end of the linear pipeline is connected with the tail end of the spiral pipeline, so that the spiral pipeline and the linear pipeline are connected into a closed loop;
a liquid inlet, an air outlet and a pipeline pressure regulating valve are arranged on the circulating pipeline, and valves are respectively arranged on the liquid inlet and the air outlet;
and cooling water is injected into the circulating pipeline.
2. The solar radiation power proof concrete box structure of claim 1, wherein the circulating pipeline is provided with a detection port, and the detection port is provided with a pressure gauge.
3. The concrete box structure for preventing solar radiation energy as claimed in claim 1, wherein the liquid inlet is arranged at one end of the spiral pipeline.
4. The solar radiation energy-proof concrete box structure of claim 3, wherein the air outlet is arranged at the other end of the spiral pipeline.
5. The solar radiation energy-proof concrete box structure of claim 3, wherein the liquid inlet is extended in a direction perpendicular to the side surface of the concrete base.
6. The solar radiation protection concrete box structure of claim 4, wherein said air outlet is extended in a direction perpendicular to the side of the concrete base.
7. The concrete box structure and bridge box for solar radiation protection according to claim 1, wherein the air pressure in the circulation pipeline is 10 kPa.
8. The concrete box structure and bridge box for solar radiation protection according to claim 1, wherein the spiral pipeline is a square spiral pipeline.
9. The solar radiation protection concrete box structure of claim 1, wherein said straight pipeline is located on the central axis of said spiral pipeline.
10. A solar radiation energy preventing bridge box body is characterized by comprising a plurality of solar radiation energy preventing concrete box body structures according to any one of claims 1-9, wherein the central shafts of the plurality of concrete box body structures are positioned on the same horizontal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911386750.6A CN111074745A (en) | 2019-12-29 | 2019-12-29 | Concrete box structure for preventing solar radiation energy and bridge box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911386750.6A CN111074745A (en) | 2019-12-29 | 2019-12-29 | Concrete box structure for preventing solar radiation energy and bridge box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111074745A true CN111074745A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911386750.6A Pending CN111074745A (en) | 2019-12-29 | 2019-12-29 | Concrete box structure for preventing solar radiation energy and bridge box |
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| CN (1) | CN111074745A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480848A (en) * | 2014-12-15 | 2015-04-01 | 重庆交通大学 | Concrete box structure with temperature difference stress influence resistance and bridge box |
| CN104746419A (en) * | 2015-03-27 | 2015-07-01 | 重庆交通大学 | Concrete box structure with cooling device |
| JP2016050459A (en) * | 2014-09-02 | 2016-04-11 | 株式会社富士ピー・エス | Concrete casting method for mass concrete section |
| CN206245206U (en) * | 2016-12-09 | 2017-06-13 | 南京博睿工程咨询有限公司 | Bridge casing web protection device |
-
2019
- 2019-12-29 CN CN201911386750.6A patent/CN111074745A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016050459A (en) * | 2014-09-02 | 2016-04-11 | 株式会社富士ピー・エス | Concrete casting method for mass concrete section |
| CN104480848A (en) * | 2014-12-15 | 2015-04-01 | 重庆交通大学 | Concrete box structure with temperature difference stress influence resistance and bridge box |
| CN104746419A (en) * | 2015-03-27 | 2015-07-01 | 重庆交通大学 | Concrete box structure with cooling device |
| CN206245206U (en) * | 2016-12-09 | 2017-06-13 | 南京博睿工程咨询有限公司 | Bridge casing web protection device |
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Application publication date: 20200428 |
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| RJ01 | Rejection of invention patent application after publication |