CN114808664B - Solid-web arch bridge energy storage device based on high-alumina cement and construction method - Google Patents
Solid-web arch bridge energy storage device based on high-alumina cement and construction method Download PDFInfo
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- CN114808664B CN114808664B CN202210365935.4A CN202210365935A CN114808664B CN 114808664 B CN114808664 B CN 114808664B CN 202210365935 A CN202210365935 A CN 202210365935A CN 114808664 B CN114808664 B CN 114808664B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 121
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000004568 cement Substances 0.000 title claims abstract description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000007787 solid Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011381 foam concrete Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 24
- 238000003860 storage Methods 0.000 claims description 20
- 238000011049 filling Methods 0.000 claims description 16
- 238000002955 isolation Methods 0.000 claims description 16
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 14
- 229910001653 ettringite Inorganic materials 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 11
- 239000010426 asphalt Substances 0.000 claims description 7
- 210000001015 abdomen Anatomy 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 238000006703 hydration reaction Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 2
- 239000004088 foaming agent Substances 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 22
- 230000008018 melting Effects 0.000 abstract description 22
- GJPIVNTZJFSDCX-UHFFFAOYSA-N [V].[Ca] Chemical compound [V].[Ca] GJPIVNTZJFSDCX-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004575 stone Substances 0.000 abstract description 3
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- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
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- 238000009933 burial Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
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- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
- E01C11/245—Methods or arrangements for preventing slipperiness or protecting against influences of the weather for preventing ice formation or for loosening ice, e.g. special additives to the paving material, resilient coatings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
- E01C11/26—Permanently installed heating or blowing devices ; Mounting thereof
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to the technical field of solid arch bridges, and relates to a solid arch bridge energy storage device based on high-alumina cement and a construction method. The arch bridge comprises a bridge deck pavement layer, an arch energy storage filler and a main arch ring, wherein the bridge deck pavement layer, the arch energy storage filler and the main arch ring are sequentially arranged from top to bottom along a midspan section of the solid-web arch bridge, a bridge deck buried pipe is arranged in the arch energy storage filler, a vertical water passing channel is arranged in the arch energy storage filler, the water passing channel penetrates through the bridge deck buried pipe and is communicated with the bridge deck pavement layer, the bridge deck pavement layer is made of a water permeable material, the arch energy storage filler is foam concrete, and calcium vanadium stone is contained in the foam concrete. The snow melting problem of the solid arch bridge deck and the treatment problem of ice and snow melting water are solved, and the manpower and material resource investment of the snow melting of the bridge deck is reduced.
Description
Technical Field
The invention belongs to the technical field of solid arch bridges, and particularly relates to a solid arch bridge energy storage device based on high-alumina cement and a construction method.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The solid arch bridge is a bridge type widely used due to simple appearance and convenient construction. However, in the solid arch bridge located in the cold winter, the bridge deck often has snow accumulation, and the snow accumulation can seriously affect the traffic capacity of the bridge deck and even cause traffic accidents. At present, the main means of snow melting on the bridge deck is to spread a snow melting agent on the bridge deck, although the method is convenient and easy to implement, the method can corrode the bridge structure, the manpower and financial investment for snow melting can be additionally increased, the maintenance cost of the bridge is increased, and the method is obviously not an excellent snow melting measure.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a solid arch bridge energy storage device based on high-alumina cement and a construction method.
In order to solve the technical problems, the technical scheme of the invention is as follows:
according to the first aspect, the solid arch bridge energy storage device based on the high-alumina cement is characterized in that a bridge deck pavement layer, an arch energy storage filler and a main arch ring are sequentially arranged from top to bottom along a midspan section of a solid arch bridge, a bridge deck buried pipe is arranged in the arch energy storage filler, a vertical water passing channel is arranged in the arch energy storage filler, the water passing channel is communicated with the bridge deck pavement layer, the bridge deck pavement layer is made of a water permeable material, the arch energy storage filler is foam concrete, and calcium vanadium stone is contained in the foam concrete.
The invention provides an energy storage device for a solid-web arch bridge, which is characterized in that an energy storage filler containing ettringite is arranged between a main arch ring and a bridge deck pavement layer, the spatial position of the energy storage filler is fully utilized, and the main arch ring can be utilized for supporting. And filling the filler to melt ice and snow on the bridge deck of the solid arch bridge.
The arch energy storage filler is internally provided with a water passing channel which can release a water source for hydration to the arch energy storage filler, the water source permeates through a bridge deck pavement layer, the bridge deck pavement layer is made of a water permeable material, the water source can permeate into the arch energy storage filler directly and then directly contacts with the arch energy storage filler in the water passing channel, so that the ettringite reacts to release heat.
And the arched energy storage filler is heated by the bridge deck buried pipe laid in the arched energy storage filler, and absorbs heat to store energy.
The repeated process can realize the process of energy storage and energy release of the solid arch bridge. The heat energy can be released to the bridge deck pavement layer through the direct contact form with the bridge deck pavement layer in the energy releasing process, snow, ice and the like above the bridge deck pavement layer are heated to be melted, and the bridge deck top of the solid arch bridge is safer to run.
In a second aspect, the building method of the solid arch bridge energy storage device based on the high alumina cement comprises the following steps:
building a solid arch bridge part: arranging an isolation layer on the upper surface of the main arch ring, then erecting a side mold and a top mold on the upper surface of the isolation layer, filling part of energy storage filler on the arch, then laying a buried pipe, and filling the rest part of energy storage filler on the arch;
and after the construction of the energy storage filler on the arch is finished, constructing a bridge deck pavement layer on the upper surface of the energy storage filler on the arch.
After a part of the solid arch bridge construction, the buried pipe is laid, and then the rest of the arch energy storage filler is laid. The side mold and the top mold are used for supporting, and filling of the arch energy storage filler is facilitated.
One or more technical schemes of the invention have the following beneficial effects:
1) The invention takes the arch filling material of the solid arch bridge as the energy storage structure, and fully utilizes the water permeability characteristic of the permeable asphalt, thereby realizing the structural and functional integration of the arch energy storage filling material.
2) The solid arch bridge energy storage device solves the snow melting problem and the ice and snow melting water treatment problem of the solid arch bridge deck, and reduces the manpower and material resource investment of the deck snow melting.
3) The solid arch bridge energy storage device takes solar energy and valley electricity as main energy sources of a snow melting system, so that the full utilization of energy is realized, the power load in a peak period is relieved, and the carbon neutralization and carbon peak reaching work process in China is assisted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is an overall block diagram of a solid arch bridge energy storage device based on high alumina cement;
FIG. 2 is a schematic cross-sectional view of the central axis of a solid arch bridge section;
FIG. 3 is a schematic longitudinal cross-sectional view of a solid arch bridge section;
FIG. 4 is a schematic view of the connection of the buried pipe of the bridge deck with the water inlet pipe and the water outlet pipe;
FIG. 5 is a schematic view of a top mold, wherein a is a side view, b is a front view, and c is a top view;
the device comprises a bridge deck pavement layer 1, an arch energy storage filler 2, a main arch ring 3, a bridge deck buried pipe 4, a water tank 5, a solar energy collecting device 6, a solar energy collecting device 7, an energy storage and discharge device 8, a valley electricity collecting device 9, a water inlet pipe 10, a water outlet pipe 11, a top mold 12, a bulge 13, a control room 14, a side isolation layer 15 and an arch belly.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 2, in a first aspect, a solid arch bridge energy storage device based on high alumina cement sequentially comprises a bridge deck pavement layer 1, an arch energy storage filler 2 and a main arch ring 3 from top to bottom along a midspan section of a solid arch bridge, wherein a bridge deck buried pipe 4 is arranged in the arch energy storage filler, a vertical water passage is arranged in the arch energy storage filler 2 and is communicated with the bridge deck pavement layer 1, the bridge deck pavement layer is made of a water permeable material 1, the arch energy storage filler 2 is foam concrete, and the foam concrete contains calcium vanadium stones.
In some embodiments of the invention, the upper surface of the main arch 3 is provided with a barrier layer in the longitudinal direction. In order to separate the energy storage filler layer from the part below the energy storage filler layer. The isolation layer has the functions of water isolation and heat insulation, and the water isolation is used for preventing water in the reactor from permeating into other structures of the bridge to influence the structural durability of the bridge; the heat insulation is used for reducing the heat loss of the snow melting system and improving the snow melting efficiency. Further, the side isolation layer 14 is arranged on the side face corresponding to the energy storage filler on the arch of the bridge, and the effects of seepage prevention and heat insulation are improved.
In some embodiments of the invention, the on-arch energy storage filler is disposed at one of a location of the arch, a location of the soffit, or both the arch and the soffit. As shown in fig. 2 and 3, the arch energy storage filler is arranged at the position of the arch and is an arch filler layer; the arch energy storage filler is arranged at the arch position and is an arch filler layer. When the arch crown filler layer and the arch crown filler layer are arranged at the arch crown and the arch crown, the arch crown filler layer and the arch crown filler layer are integrally arranged, and an isolating layer is not arranged in the middle.
In some embodiments of the invention, the deck burial pipe is arranged in the middle of the energy storage filler on the arch.
In some embodiments of the invention, the thickness of the energy storing filler on the arch is 30-60cm.
In some embodiments of the invention, the layer of bridge deck pavement has a thickness of 10-30cm.
In some embodiments of the present invention, the material of the bridge deck pavement layer is permeable asphalt.
In some embodiments of the invention, the spacing between adjacent water passage channels is 2-4m. The distance between the adjacent water passing channels can be beneficial to the heat exchange process of the arched energy storage filler.
In some embodiments of the invention, the bridge deck buried pipe has an internal diameter of 10-20cm and a pipe wall thickness of 3-5mm.
In some embodiments of the invention, a temperature sensor and a humidity sensor are disposed inside the energy storage filler on the arch.
As shown in fig. 3, in some embodiments of the present invention, the present invention further comprises a water tank and an energy supply device, wherein the energy supply device is connected with the water tank, and the water tank is connected with the bridge deck buried pipe of the solid arch bridge. The water tank is connected with a bridge deck buried pipe of the solid arch bridge through a water inlet pipe 9 and a water outlet pipe 10; further, a water supply pump is provided on the water inlet pipe 9. The bridge floor buried pipe is spirally tiled; the bridge floor buried pipes are arranged in sections, and a plurality of sections of buried pipes are respectively connected with the water inlet pipe 9 and the water outlet pipe 10. The water tank is matched with the energy supply device to release heat for the arch energy storage filler, so that the arch energy storage filler can store energy.
In some embodiments of the present invention, as shown in fig. 1, the present invention further comprises a power storage and discharge device, wherein the power storage and discharge device is connected with the power supply device, and the power storage and discharge device is connected with the water tank. The power storage and discharge device can utilize the electric energy stored by the power storage and discharge device to heat the water tank.
In some embodiments of the invention, the energy supply device is a solar energy collection device; in addition, the system also comprises a valley electricity collecting device. The solar energy collecting device can collect solar radiant heat to heat the water tank and can store redundant radiant heat in the form of electric energy in the power storage and discharge device. The energy collected by the valley electricity collecting device is also stored in the accumulating and discharging device. The direct heat source of water tank heating has two, and the direct radiant heat that comes from the sun is first, and second holds discharge apparatus, so the water tank heating can not receive the restraint of having or not sun.
In some embodiments of the invention, the system further comprises a controller electrically connected with the power storage and discharge device, the water tank and the supply pump. So as to enable remote control of the device. And the device is also in electric signal connection with a temperature sensor and a humidity sensor, so that the device is favorable for controlling each device to be switched on and off, adjusting parameters such as humidity, temperature and the like.
In a second aspect, the building method of the solid arch bridge energy storage device based on high alumina cement comprises the following steps:
building a solid arch bridge part: arranging an isolation layer on the upper surface of the main arch ring, then erecting a side mold and a top mold on the upper surface of the isolation layer, filling energy storage filler on partial arches, then laying buried pipes, and filling the energy storage filler on the rest arches;
and after the construction of the energy storage filler on the arch is finished, constructing a bridge deck pavement layer on the upper surface of the energy storage filler on the arch.
After a part of the solid arch bridge construction, the buried pipe is laid, and then the energy storage filler is laid on the rest arch. The side mold and the top mold are used for supporting, and filling of the energy storage filler on the arch is convenient.
In some embodiments of the invention, the preparation of the on-arch energy storage filler: firstly adding water, and then adding sulphoaluminate cement and gypsum to obtain cement paste;
and mixing and diluting the foaming agent and water, and adding the foam stabilizer to obtain the foam.
In order to ensure sufficient hydration reaction and obtain sufficient ettringite, water (demineralized pure water) is added into the mixture before mixing, then the mixture of sulphoaluminate cement and gypsum is added, and the mixture is fully stirred to obtain cement paste.
The purpose of the foaming process is mainly two: firstly, the cement paste has the characteristics of light weight and good construction performance of the arch energy storage filler; and secondly, the internal stress caused by the temperature gradient is reduced, and the cracking of the filler caused by the temperature gradient in the subsequent energy storage and heat release process is prevented.
And mixing the cement paste with the foam to obtain the foamed cement paste.
As shown in fig. 4, in some embodiments of the present invention, the top mold 11 comprises a molding board and a protrusion 12 vertically disposed on one surface of the molding board, wherein the protrusion 12 has a height of 10-40cm and a diameter of 10-50cm; further, the protrusions 12 include a middle protrusion and a plurality of side protrusions, the middle protrusion is disposed at a middle position of the mold plate, and the side protrusions are symmetrically disposed on the mold plate; furthermore, the height of the middle bulge is 10-40cm, the diameter is 30-50cm, the height of the lateral bulge is 20-40cm, and the diameter is 10-20cm.
The protrusion on the top die is beneficial to forming a vertical water passing channel in the energy storage filler. Formed directly during the filling process. The projections comprise middle projections and side projections, which are beneficial to more uniform distribution of the water passing channel.
In some embodiments of the present invention, a temperature sensor and a humidity sensor are provided above the isolation layer during construction of the solid arch bridge portion; and a temperature sensor and a humidity sensor are arranged at the top of the energy storage filler on the arch. The number of the temperature and humidity sensors is determined by the amount of the filler. The temperature and humidity conditions of the top surface and the bottom surface of the energy storage filler on the arch can be monitored.
In some embodiments of the invention, besides the construction of the solid arch bridge part, the connection construction of the energy supply device and the water tank is carried out, the connection construction of the water tank and the buried pipe of the bridge floor is carried out, and the connection construction of the energy supply device and the power storage and discharge device is carried out.
The invention will be further illustrated by the following examples
Example 1
The construction method comprises the following steps:
as shown in fig. 2 and 3, the arch energy storage filler is arranged at the arch top and is an arch top filler layer, and as can be seen in fig. 2 and 3, the bridge deck pavement layer 1, the arch energy storage filler 2, the arch belly 15 and the main arch ring 3 are arranged in sequence from top to bottom; (1) and (5) constructing a solid arch bridge part. After the main arch ring 3 is constructed and reaches the specified strength of the relevant specification, the construction of the energy storage filler 2 on the arch can be carried out. Firstly, arch belly 15 construction is carried out, the construction method adopts a conventional method in the engineering field, then energy storage filler construction is carried out, a water-proof and heat-insulating isolation layer is arranged before filler construction, then a plurality of temperature and humidity sensors are arranged on the isolation layer and used for monitoring the temperature and humidity conditions of the bottom surface of the filler layer, and the number of the temperature and humidity sensors is determined according to the amount of the filler. In the process of filling construction, the thickness of the filling is controlled within the range of 30-60cm, a side die and a top die are firstly supported, half of the total thickness of the filling is filled, after the filled part has certain strength, the top die is detached and a stainless steel pipe is arranged, the inner diameter of the pipe is 10-20cm, and the wall thickness of the pipe is 3-5mm. And installing the top die again, and continuously filling the filler with the other half thickness after the installation is finished. Through the operation, after the energy storage filler is demoulded and maintained, the energy storage filler layer with the embedded stainless steel pipes and the vertical water passing pore channels is obtained, wherein the interval between the vertical pore channels is 2-4m, and the energy storage filler layer is inserted between the bridge deck embedded pipes 4 (the stainless steel pipes). After the above processes are completed, a plurality of temperature and humidity sensors are mounted on the top surface of the filler layer for monitoring the temperature and humidity conditions of the top surface of the filler. And then constructing the bridge deck pavement layer 1, and selecting permeable asphalt as a pavement material, wherein the thickness of the permeable asphalt layer is 10-30cm. So far, the whole solid arch bridge part is basically built, and if the energy storage filler is exposed in the air, heat insulation and water isolation treatment of the exposed surfaces should be done, so that the temperature and humidity in the energy storage filler reactor are controlled more accurately, and meanwhile, the following reactions of ettringite in the filler and carbon dioxide in the air are inhibited:
3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 O+3CO 2 →3CaCO 3 +3(CaSO 4 ·2H 2 O)+Al 2 O 3 ·xH2O+(26-x)H 2 O
in addition, the temperature and humidity sensors are connected through lines, so that an operator can monitor temperature and humidity data of the sensors in a control room.
(2) A control room is established. The control room 13 may be established at the bridge head or at a bridge management maintenance department near the bridge, and then the controller, the power storage and discharge device 7 and the water tank 5 pump are installed in the control room 13. The solar energy collection device 6 and the valley electricity collection device 8 should also be connected to the storage and discharge device 7 by a line connection.
(3) The components are connected. The water tank 5, the pump, the upstream thermometer of the reactor, the reactor and the downstream thermometer of the reactor are connected in series in sequence. The solar energy collecting device 6, the pump and the water tank 5 are sequentially connected in series, so that the water in the water tank is heated by solar radiation. The solar energy collecting device is connected with the power storage and discharge device, and the absorbed redundant radiant heat is stored in the solar energy collecting device in the form of electric energy. The valley electricity collecting device 8 is connected with the storing and discharging device 7, and the collected valley electricity is stored in the storing and discharging device.
Example 2
The specific operation method is shown in FIG. 1
1) And (4) an energy storage stage.
The main work content of the stage is to store the collected solar energy and valley electric energy in the arch energy storage filler (namely, an energy storage filler reactor) of the arch bridge, and the energy storage principle is that ettringite in the filler reacts to absorb heat as follows:
3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 O→3CaO·Al 2 O 3 ·3CaSO 4 ·12H 2 O+20H 2 o (endothermic)
Under the condition of sufficient solar radiation in the daytime (including but not limited to sunny day in summer and any time period with sufficient solar radiation), the solar radiation is collected by the solar energy collecting device 6 to heat the water in the water tank, and the redundant radiant heat is stored in the storage and discharge device 7 in the form of electric energy synchronously; during night hours and other electricity consumption valley periods, electric energy is collected by the valley electricity collecting means and stored in the storage and discharge means 7. Therefore, the water in the water tank can be heated all the day, namely the energy storage stage can be carried out at any time theoretically. The water temperature of the water tank is heated to control the temperature to be 70-110 ℃, the temperature is not more than 110 ℃, and the decomposition reaction of the ettringite is prevented:
3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 O→3CaO·Al 2 O 3 ·CaSO 4 ·12H 2 O+2CaSO 4 ·0.5H 2 O+19H 2 O
and: 3 CaO. Al 2 O 3 ·3CaSO 4 ·32H 2 O→3CaO·Al 2 O 3 ·6H 2 O+3CaSO 4 +26H 2 O
Then, a pump of the thermal circulation device is started, so that the water in the water tank flows and circulates in the reactor through the stainless steel pipe. When the temperatures of the upstream and downstream of the reactor, the upper and lower surfaces of the reactor all reach the control temperature or the four temperatures all reach within + -5 ℃ of the control temperature, the temperature of the whole reactor can be considered to reach the control temperature; in this case, the water vapor pressure in the reactor should be controlled to be 8-533 mbar, and the relative humidity should be below 10%. Similarly to the temperature control, when the humidity (water vapor pressure) of both the upper surface and the lower surface of the reactor reaches the control humidity (water vapor pressure) or one of the surfaces reaches the control humidity (water vapor pressure) and the other surface does not differ much from the control humidity (water vapor pressure), it can be considered that the humidity (water vapor pressure) in the reactor reaches the control humidity (water vapor pressure). Within the control range, the lower the relative humidity and the higher the temperature, the better the energy storage effect. However, it should be noted that the ettringite may be decomposed when the temperature is too high, so the coordination among the temperature, the water vapor pressure and the humidity should be made according to the actual situation.
2) Snow melting stage
The energy storage density of the ettringite in a completely dry state is about 300 kW.h/m 3 . Taking a solid-web arch bridge with 50cm of arch energy storage filler, 8m of bridge deck width and 25m of net span as an example (the filler volume is about 26m x 8m x 0.5 m), assuming that the energy stored by the arch energy storage filler can be completely released, the released heat is about 31200 kW.h, and if the snow accumulated in the bridge deck within 24h reaches 10mm (snow burst standard), the energy required for completely melting the accumulated snow is far less than the released heat through rough calculation. In theory, the energy stored in the reactor is sufficient to meet the requirements for snow melting on the bridge deck.
The main work content of the snow melting stage is to release the heat stored in the energy storage filler reactor for melting snow again, and the specific operation is divided into the following two stages: and (1) preheating the energy storage filler 2 on the arch. An operator heats the water tank by using energy stored in the power storage and discharge device in the control room, heats the water to 5-15 ℃, and starts the pump machine to make the heated water flow in the reactor. The purpose of this operation is two: the first is to raise the temperature of the filler to prevent the cracking of the filler caused by temperature gradient in the subsequent heat release process; secondly, part of the accumulated snow is melted into snow water, and the snow water flows to the energy storage filler through the permeable asphalt layer to provide a hydration water source for the heat release of the ettringite in the energy storage filler, so that the heat release process of the energy storage filler is further started.
(2) And continuously heating. When the melted snow water contacts the energy storage filler through the water-permeable asphalt layer, the ettringite in the energy storage filler reacts as follows:
3CaO·Al 2 O 3 ·3CaSO 4 ·12H 2 O+20H 2 O→3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 o (exothermic)
The heat released by the reaction is absorbed by the accumulated snow, and the accumulated snow is further melted to generate more snow water to flow into the energy storage filler, so that the circulation is performed, and the accumulated snow is gradually and completely melted. In the process, the readings of the temperature and humidity sensors are paid attention at any time to avoid overhigh temperature in the filler, the thermal circulation device can be opened when necessary, and water with lower temperature is introduced into the reactor for temperature regulation.
Because the reaction principles of the energy storage stage and the snow melting stage are reversible reactions (completely reversible), the system can perform multiple energy storage-snow melting cycles, and multiple snow melting on the bridge deck is realized. In the specific operation method, the arch energy storage filler is only used as an energy storage material for detailed description, and if the energy stored by the arch energy storage filler cannot meet the snow melting requirement in practical application, the same energy storage filler can be used for arch filling, the heat supply and storage principles are the same, and only the construction process or the construction process is different in the filler construction process.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a real abdomen formula arched bridge energy memory based on high alumina cement which characterized in that: the bridge deck pavement layer, the arch energy storage filler and the main arch ring are sequentially arranged from top to bottom along the midspan section of the solid-web arch bridge, bridge deck buried pipes are arranged in the arch energy storage filler, vertical water passing channels are arranged in the arch energy storage filler and are communicated with the bridge deck pavement layer, the bridge deck pavement layer is made of a water permeable material, the arch energy storage filler is foam concrete, and the foam concrete contains ettringite;
the water passing channel can release a water source for hydration for the part of the arched energy storage filler, the water source directly reaches the arched energy storage filler after permeating through the bridge deck pavement layer, and then is directly contacted with the arched energy storage filler in the water passing channel, so that the ettringite reacts to release heat, and the reaction formula is as follows:
3CaO·Al 2 O 3 ·3CaSO 4 ·12H 2 O+20H 2 O→3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 O；
the device also comprises a water tank and an energy supply device; the energy supply device is connected with the water tank, and the water tank is connected with a bridge deck buried pipe of the solid arch bridge; the energy supply device is also connected with a power storage and discharge device which is connected with the water tank; the energy supply device is a solar energy collecting device and also comprises a valley electricity collecting device; the solar energy collecting device can collect solar radiant heat to heat the water tank and store redundant radiant heat in the form of electric energy in the power storage and discharge device; the energy collected by the valley electricity collecting device is also stored in the power storage and discharge device;
the storage and discharge device can utilize the electric energy stored by the storage and discharge device to heat the water tank; the water tank is matched with the energy supply device to release heat for the energy storage filler on the arch, so that the energy storage filler on the arch stores energy;
the energy storage principle is that ettringite in the filler reacts as follows to absorb heat:
3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 O→3CaO·Al 2 O 3 ·3CaSO 4 ·12H 2 O+20H 2 O。
2. the solid arch bridge energy storage device based on aluminous cement of claim 1, wherein: in the longitudinal direction, the upper surface of the main arch ring is provided with an isolation layer.
3. The solid arch bridge energy storage device based on aluminous cement of claim 1, wherein: the arch energy storage filler is arranged at one of the positions of the arch crown and the position of the arch belly or the positions of the arch crown and the arch belly;
or the thickness of the arch energy storage filler is 30-60cm;
or the thickness of the bridge deck pavement layer is 10-30cm.
4. The solid arch bridge energy storage device based on aluminous cement of claim 1, wherein: the bridge deck pavement layer is made of permeable asphalt.
5. The aluminous cement-based solid arch bridge energy storage device of claim 1, wherein: the distance between adjacent water passing channels is 2-4m.
6. The method of constructing an aluminous cement based solid arch bridge energy storage device according to any of claims 1 to 5, wherein: the method comprises the following steps: building a solid arch bridge part: arranging an isolation layer on the upper surface of the main arch ring, then erecting a side mold and a top mold on the upper surface of the isolation layer, filling energy storage filler on partial arches, then laying buried pipes, and filling the energy storage filler on the rest arches;
and after the construction of the arched energy storage filler is finished, constructing a bridge deck pavement layer on the upper surface of the arched energy storage filler.
7. The construction method according to claim 6, wherein: preparing the arch energy storage filler: firstly adding water, and then adding sulphoaluminate cement and gypsum to obtain cement paste;
and mixing and diluting the foaming agent and water, and adding the foam stabilizer to obtain the foam.
8. The construction method according to claim 6, wherein: the top die comprises a die plate and a protrusion vertically arranged on one plate surface of the die plate, wherein the height of the protrusion is 10-40cm, and the diameter of the protrusion is 10-50cm.
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| CN202210365935.4A CN114808664B (en) | 2022-04-08 | 2022-04-08 | Solid-web arch bridge energy storage device based on high-alumina cement and construction method |
| NL2034359A NL2034359B1 (en) | 2022-04-08 | 2023-03-16 | Energy storage device of solid belly arch bridge based on high alumina cement and construction method thereof |
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