CN112726421A - Construction process of bridge pier bearing platform - Google Patents
Construction process of bridge pier bearing platform Download PDFInfo
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- CN112726421A CN112726421A CN202110077303.3A CN202110077303A CN112726421A CN 112726421 A CN112726421 A CN 112726421A CN 202110077303 A CN202110077303 A CN 202110077303A CN 112726421 A CN112726421 A CN 112726421A
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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
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A construction process of a bridge pier bearing platform comprises the steps of laying a concrete cushion layer at the bottom of a foundation pit, arranging a template, binding bearing platform steel bars on the inner side of the template and arranging embedded parts; pouring concrete in a layered manner, curing until the required strength is achieved, and then removing the template; when reinforcing steel bars of a bearing platform are bound, a plurality of temperature measuring element isolating strips are arranged at each certain bound height; the temperature measuring element isolating strip is provided with an upper wing plate which is horizontally arranged, and one side of the lower end surface of the upper wing plate is provided with a side wing plate; the temperature measuring element and the connecting line thereof are arranged in an inner cavity of a semi-closed structure enclosed by the upper wing plate and the side wing plate; and (3) laying a layer of cooling water pipe every time a certain number of layers of temperature measuring element isolating strips are arranged, and repeatedly arranging the temperature measuring element isolating strips and the cooling water pipes in the process of binding the reinforcing steel bars until the binding is finished. The temperature measuring element isolating strip has a protection effect on the temperature measuring element, so that the temperature measuring element is prevented from being deviated or malfunctioning due to contact, the measurement accuracy is ensured, accurate reference is provided for controlling the internal temperature of concrete, the accurate temperature control is favorably realized, and the concrete quality is improved.
Description
Technical Field
The invention relates to a bridge construction process, in particular to a construction process of a bridge pier bearing platform.
Background
The bridge pier bearing platform is a supporting foundation at the lower part of a pier, is large in size and large in concrete pouring amount, and belongs to large-size concrete construction. After the large-volume concrete is poured, a large amount of hydration heat is generated inside, the hydration heat is released more intensively, and the temperature rise inside is faster. When the temperature difference between the inside and the outside of the concrete is large, the concrete can generate temperature cracks, and the structural safety and normal use are influenced.
In order to control the internal temperature of the concrete, a temperature measuring element and a cooling water pipe are usually embedded in the concrete in the construction process, and cooling water is introduced to reduce the internal temperature of the concrete according to the detected temperature condition so as to achieve the purpose of reducing the internal and external temperature difference of the concrete. In the prior art, the temperature measuring element and the connecting wire thereof are usually directly bound on the steel bars of the concrete framework, and are easy to be impacted by concrete or touched by a vibrator to be displaced or even damaged and failed in the process of pouring concrete, so that the internal temperature of the concrete is measured inaccurately. Also some pre-buried steel pipes in the concrete, measure the temperature through set up temperature element in the steel pipe, but because the inside relative seal of steel pipe and the low heat conductivity of air lead to temperature measurement also inaccurate to pre-buried steel pipe also has certain influence to concrete building's overall structure nature. If the temperature of each area in the concrete cannot be accurately measured, the control of the water temperature and the flow of the cooling water pipe is also inevitably inaccurate according to the inaccurate result, which is not beneficial to better curing the concrete.
Disclosure of Invention
The invention aims to solve the technical problem that temperature control inside concrete is inaccurate due to the fact that a temperature measuring element arranged in the prior art is easily interfered and even damaged by touch, and provides a construction process of a bridge pier cap, which is more beneficial to concrete maintenance.
The technical scheme adopted by the invention for solving the technical problems is as follows: a construction process of a bridge pier bearing platform comprises the steps of laying a concrete cushion layer at the bottom of an excavated foundation pit, arranging a template according to a defined side line of the bearing platform, binding bearing platform reinforcing steel bars on the inner side of the template and arranging embedded parts, wherein the embedded parts comprise cooling water pipes and temperature measuring elements; after binding the reinforcing steel bars, gradually pouring concrete in layers and vibrating, curing until the concrete reaches the required strength after the bearing platform is integrally poured, and then removing the template. When reinforcing steel bars of a bearing platform are bound, a plurality of horizontally extending temperature measuring element isolating bars are arranged in the plane direction of the bearing platform every time the reinforcing steel bars with a certain height are bound; the temperature measuring element isolating strip is provided with an upper wing plate which is horizontally arranged and used for protecting the temperature measuring element, one side of the lower end surface of the upper wing plate is provided with a side wing plate which is used for limiting the position of the temperature measuring element and a connecting line thereof and blocking concrete, and the other side of the upper wing plate is of an open structure which can allow the concrete to flow to the lower part of the upper wing plate; arranging a temperature measuring element and a connecting wire thereof in an inner cavity of a semi-closed structure enclosed by the upper wing plate and the side wing plate, and thermally isolating the temperature measuring element from the upper wing plate and the side wing plate; in the process of binding the reinforcing steel bars, once a certain number of layers of temperature measuring element isolating strips are arranged, a layer of cooling water pipe is arranged in the plane direction of the bearing platform, and the operation of arranging the temperature measuring element isolating strips and the cooling water pipe in the process of binding the reinforcing steel bars is repeated until the binding of the reinforcing steel bars of the bearing platform is finished.
In the process of gradually pouring the concrete in a layered manner, water is introduced into the cooling water pipe on each layer of the concrete covered by the cooling water pipe to reduce the temperature.
And after the concrete is poured, determining the internal temperature distribution of the concrete of the bearing platform according to the detection values of different temperature measuring elements, and adjusting the water passing temperature and flow of different cooling water pipes according to the temperature distribution.
Comparing the detection values of a plurality of temperature measurement elements in the area between two adjacent cooling water pipes, and increasing the water inlet temperature of the cooling water pipes and increasing the flow rate when the temperature measurement element corresponding to the highest detection value is positioned in the middle of the area and the difference value between the highest detection value and the lowest detection value is greater than a set threshold value; when the highest temperature detection value is positioned at one side of the area, the water inlet temperature of the cooling water pipe at the side is reduced.
When the detection value of the temperature measuring element exceeds the set maximum temperature value, the water inlet temperature of the cooling water pipe closest to the temperature measuring element is reduced, and the flow is increased.
The difference between the water pipes of the inlet and the outlet of the cooling water pipe is controlled between 5 ℃ and 10 ℃ until the peak value of the hydration heat of the concrete is reached, and the flow of the cooling water pipe is halved after the peak value is reached.
The upper wing plate is provided with circulation holes distributed along the length direction of the upper wing plate.
When laying condenser tube, every layer all sets up a plurality of condenser tubes that distribute side by side, and each condenser tube's water inlet all is connected with independent control's control valve.
The cooling water pipes adopt serpentine cooling pipes which are bent back and forth, and the water flowing directions of the cooling water pipes on the same layer are the same; and in the upper and lower adjacent layers, the water passing directions of the corresponding cooling water pipes in the vertical direction are opposite.
After the concrete is cured to reach the required strength, cement paste is introduced into the cooling water pipe to fill the cavity in the cooling water pipe.
The invention has the beneficial effects that: the temperature measuring element isolating strip can effectively protect the temperature measuring element, and the upper wing plate can prevent the cast concrete from impacting the temperature measuring element and the connecting line thereof from the upper side. In the transverse direction, due to the blocking effect of the side wing plates, the concrete can only laterally flow from the side without the side wing plates to push the temperature measuring element and the connecting line thereof, and the pushing direction only enables the temperature measuring element and the connecting line thereof to enter the protection range of the upper wing plates and the side wing plates more deeply. When the vibrator is used for vibrating concrete, no matter how the vibrator is moved by an operator, the temperature measuring element and the connecting wire thereof under the protection of the temperature measuring element isolating strip cannot be touched, so that deviation or failure cannot be caused, the measuring accuracy is ensured, accurate reference is provided for controlling the internal temperature of the concrete, and the accurate temperature control and the improvement of the quality of a bridge pier bearing platform are facilitated.
Drawings
FIG. 1 is a schematic view of the framework structure of the bridge pier cap of the invention.
FIG. 2 is a schematic view showing the arrangement of the spacer and the connecting wires of the temperature measuring element according to the present invention.
FIG. 3 is a cross-sectional view of a spacer for a temperature measuring element according to the present invention.
FIG. 4 is a schematic view of the arrangement of the spacer flow holes of the temperature measuring element according to the present invention.
FIG. 5 is a schematic view of the distribution of temperature sensing elements in a horizontal plane of the present invention.
Fig. 6 is a schematic view of the arrangement of cooling water pipes in a horizontal plane according to the present invention.
Fig. 7 is a schematic view showing the arrangement of cooling water pipes in another horizontal plane adjacent to fig. 6.
The labels in the figure are: 1. the concrete temperature-measuring device comprises a template, 2, a steel reinforcement framework, 3, a temperature-measuring element isolating strip, 301, an upper wing plate, 302, a side wing plate, 303, a circulation hole, 4, a temperature-measuring element, 5, a connecting line, 6, a cooling water pipe, 601, a water inlet, 602, a water outlet, 7, concrete, 8 and a protection groove.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings.
The basic construction steps of the construction process of the bridge pier bearing platform are the same as those of the prior art, after a concrete cushion layer is laid at the bottom of an excavated foundation pit, a template is arranged according to a defined side line of the bearing platform, the template 1 usually adopts a steel structure template, and a reinforcing member is assembled and arranged according to a marked line defined by a concrete building to be constructed for reinforcement. Binding a bearing platform steel bar on the inner side of the template and arranging an embedded part, wherein the embedded part comprises a cooling water pipe and a temperature measuring element; after binding the reinforcing steel bars, gradually pouring concrete in layers and vibrating, curing until the concrete reaches the required strength after the bearing platform is integrally poured, and then removing the template.
When the reinforcing steel bars of the bearing platform are bound, a plurality of horizontally extending temperature measuring element isolating strips are arranged in the plane direction of the bearing platform every time the reinforcing steel bars with a certain height are bound. For example, a layer of spacer strip for the temperature sensing element is placed at a height of 20cm, and then another layer is placed every 30cm up. The temperature measuring element isolating strip 3 can be bound with or welded and fixed with the steel bars.
As shown in FIG. 3, the temperature measuring element isolation strip 3 has an upper wing plate 301 horizontally arranged for protecting the temperature measuring element 4, a side wing plate 302 for limiting the position of the temperature measuring element 4 and the connecting wire 5 thereof and blocking concrete is arranged on one side of the lower end surface of the upper wing plate 301, and the other side is an open structure for allowing the concrete to flow to the lower part of the upper wing plate.
The temperature measuring element 4 and the connecting wire 5 thereof are arranged in an inner cavity of a semi-closed structure enclosed by the upper wing plate 301 and the side wing plate 302. The temperature measuring element 4 is thermally isolated from the upper wing plate and the side wing plate, and the influence on the measurement accuracy due to the heat conduction of the upper wing plate and the side wing plate is prevented. A specific thermal isolation means may be to deflect the temperature sensing element 4 away from the upper wing 301 and the side wings 302, which are naturally thermally isolated by the space therebetween. Or a heat insulation cushion layer is arranged between the temperature measuring element and the upper wing plate and between the temperature measuring element and the side wing plate. The upper wing plate 301 is shielded above the temperature measuring element 4 and the connecting wire 5 thereof, and instead, bears the impact of falling concrete during casting.
In the process of binding the reinforcing steel bars, every time a certain number of layers of temperature measuring element isolating bars are arranged, a layer of cooling water pipe is arranged in the plane direction of the bearing platform, when the cooling water pipe is arranged, each layer is provided with a plurality of cooling water pipes which are distributed side by side, and the water inlet of each cooling water pipe is connected with an independently controlled control valve. And repeating the operation of arranging the temperature measuring element isolating strip and the cooling water pipe in the process of binding the reinforcing steel bars until the binding of the reinforcing steel bars of the bearing platform is finished.
When the concrete is poured, a horizontal layered pouring mode is adopted, and the pouring thickness of each layer can be controlled to be about 30 cm. And each layer of pouring is pushed from one side to the other side, and the pouring and the vibrating are carried out simultaneously.
The poured concrete will flow laterally due to its own fluidity and the vibrating action. In order to prevent the flowing concrete from pushing the temperature measuring element 4 and the connecting wire 5 thereof away from the shielding of the upper wing plate 301, the side wing plate 302 is arranged on one side below the upper wing plate 301. Since the upper wing 301 is shielded on one side by the side wings 302 and is open on the other side, the flowing concrete can only flow from the open side to under the upper wing. The concrete flowing in this direction only drives the temperature measuring element 4 and the connecting wire 5 thereof closer to the side wing plate 302 and further into the protection range of the upper wing plate and the side wing plate, so that the situation that the temperature measuring element 4 and the connecting wire 5 thereof are out of protection due to the lateral flowing of the concrete does not occur.
In the process of gradually pouring the concrete in a layered manner, water is introduced into the cooling water pipe on each layer of the concrete covered by the cooling water pipe to reduce the temperature. And after the concrete is poured, determining the internal temperature distribution of the concrete of the bearing platform according to the detection values of different temperature measuring elements, and adjusting the water passing temperature and flow of different cooling water pipes according to the temperature distribution. The temperature difference of the inlet and outlet water of the cooling water pipe is controlled between 5 ℃ and 10 ℃ until the peak value of hydration heat passes, the flow in the cooling water pipe is ensured to reach 3 square/hour in the time period, the flow of the cooling water pipe is halved after the peak value passes, the cooling water is controlled to be cooled within 2 ℃ every day in the later period, the cooling water is cooled by utilizing circulating water after the temperature peak passes (the temperature difference with the highest temperature of a bearing platform is 15 ℃), and the cooling water chilling effect is reduced.
In the specific process of controlling the water-through and cooling of the cooling water pipes, comparing detection values of a plurality of temperature measurement elements in an area between two adjacent cooling water pipes, and increasing the water inlet temperature of the cooling water pipes and increasing the flow rate when the temperature measurement element corresponding to the highest detection value is positioned in the middle of the area and the difference value between the highest detection value and the lowest detection value is greater than a set threshold value; when the highest temperature detection value is positioned at one side of the area, the water inlet temperature of the cooling water pipe at the side is reduced. The set threshold reflects the temperature difference condition of different areas, and the size of the threshold can be determined according to the influence of the distance between the temperature measuring elements and the temperature difference on the internal stress of the concrete, for example, the threshold is set to be 5 ℃. It should be noted that the temperature difference between the concrete core and the surface layer, and between the surface layer and the environment should be controlled to be preferably not more than 20 ℃ and at most not more than 25 ℃. When the detection value of the temperature measuring element exceeds the set maximum temperature value (for example, the difference value between the detection value and the surface temperature reaches 20 ℃), the inlet water temperature of the cooling water pipe closest to the temperature measuring element is reduced, and the flow rate is increased. In the method, the detection value of the detection element close to the cooling water pipe is compared with the detection value of the detection element far away from the cooling water pipe, and different controls are carried out according to the comparison result, so that the defects that the local temperature reduction in the concrete is too fast, the temperature difference in different areas is too large, internal cracks are avoided and the like caused by the fact that the temperature of the temperature measurement element close to the cooling water pipe is blindly reduced due to higher detection value are avoided.
When setting up temperature element division bar 3, the temperature element division bar 3 of each layer all sets up according to the same direction is parallel to each other, avoids crisscross each other and influences the operation of vibrating to the concrete. As shown in FIG. 5, the temperature measuring elements 4 in the same temperature detecting layer are distributed in a staggered manner, and the number of the temperature measuring elements arranged in the center of the concrete is more than that of the temperature measuring elements arranged in the peripheral area, so that the whole plane is covered as much as possible. As shown in fig. 1, the connecting wires 5 of the temperature measuring elements 4 are collected to one side of the steel reinforcement framework 2 and extend upwards to the outer side of the steel reinforcement framework through the protection slot 8 arranged on the inner side of the formwork 1. The protective groove 8 can adopt a structure similar to a temperature measuring element isolating strip, the side wing plate faces the template, and the upper wing plate protects the connecting wire 5 from the inner side.
Advantageously, as shown in fig. 3, the lower end surface of the upper wing plate 301 is provided with a slope gradually decreasing in level toward the side wing plate 302, and the slope is connected to the side wing plate 302 via a circular arc transition surface. The lower end face of the upper wing plate 301 inclined downwards can accord with the flowing characteristic of concrete, so that the lower end face of the upper wing plate can flow towards the side wing plate, and the arc transition face at the corner can prevent the concrete from generating gaps below the upper wing plate 301 and at the corner, and ensure the overall quality of a concrete pouring structure.
As shown in fig. 3 and 4, a plurality of flow holes 303 are distributed in the length direction of the upper wing plate 301, and the flow holes 303 can not only allow the concrete above to flow downwards, which is beneficial for filling the space enclosed by the upper wing plate 301 and the side wing plates 302 with the concrete, but also limit the downward flow amount of the concrete, and prevent the falling concrete from impacting the temperature measuring element 4 and the connecting line 5 thereof.
As shown in fig. 6 and 7, the cooling water pipe 6 is a serpentine cooling pipe composed of a plurality of straight pipe sections and elbow sections connected with the straight pipe sections. The cooling water pipe adopts a standard cast iron water pipe with a nominal diameter of 42mm and a wall thickness of 2.5mm, the cooling pipe joint adopts a matched joint, the plane position adopts a U-shaped steel bar to be welded and fixed with the bearing platform steel bar, and if the cooling pipe collides with the bearing platform steel bar, the cooling pipe is moved properly. The cooling water pipe is required to ensure that the slurry is not mixed and does not leak water, and after the installation is finished, a dense water check is required to ensure that the pipeline is smooth during water injection. The straight pipe sections of the cooling water pipes in the same water cooling layer are arranged in parallel, and the water flowing directions of the cooling water pipes are the same. After water is introduced and heat released by concrete is absorbed, the straight pipe section of one cooling water pipe with the water outlet end with the relatively raised water temperature is adjacent to the straight pipe section of the other cooling water pipe with low-temperature cooling water just introduced, and the two straight pipe sections have comprehensive effects, so that the temperature reduction of all areas of the whole water cooling layer is more balanced.
Similarly, in the upper and lower adjacent water cooling layers, the water flowing directions of the corresponding water cooling pipes in the vertical direction are opposite, and the upper and lower cold and hot water are complementary, so that the balanced cooling of each area on the vertical layer surface is ensured.
And covering a layer of geotextile after the concrete is poured so as to prevent the surface of the concrete from being dried and shrunk and cracked due to water loss caused by wind blowing. During the period, the temperature of the concrete is controlled, after the concrete is initially set, the geotextile is adopted to cover the whole concrete and sprinkle the water in time, and the requirement of the surface wetting area of the bearing platform reaches 100 percent. Before the strength of the concrete reaches 2.5Mpa, the concrete cannot bear constructors or other loads. When the compressive strength of the concrete reaches 2.5MPa required and the surface and edges of the concrete are not damaged due to form removal, cement paste is introduced into the cooling water pipe to fill the cavity in the cooling water pipe, and the side form can be removed.
Claims (10)
1. A construction process of a bridge pier bearing platform comprises the steps of laying a concrete cushion layer at the bottom of an excavated foundation pit, arranging a template according to a defined side line of the bearing platform, binding bearing platform reinforcing steel bars on the inner side of the template and arranging embedded parts, wherein the embedded parts comprise cooling water pipes and temperature measuring elements; after the reinforcement is bound, concrete is gradually poured and vibrated in a layered mode, the whole pouring of the bearing platform is finished, the concrete is cured to reach the required strength, and then the template is removed, and the concrete pouring device is characterized in that: when reinforcing steel bars of a bearing platform are bound, a plurality of horizontally extending temperature measuring element isolating bars are arranged in the plane direction of the bearing platform every time the reinforcing steel bars with a certain height are bound; the temperature measuring element isolating strip is provided with an upper wing plate which is horizontally arranged and used for protecting the temperature measuring element, one side of the lower end surface of the upper wing plate is provided with a side wing plate which is used for limiting the position of the temperature measuring element and a connecting line thereof and blocking concrete, and the other side of the upper wing plate is of an open structure which can allow the concrete to flow to the lower part of the upper wing plate; arranging a temperature measuring element and a connecting wire thereof in an inner cavity of a semi-closed structure enclosed by the upper wing plate and the side wing plate, and thermally isolating the temperature measuring element from the upper wing plate and the side wing plate; in the process of binding the reinforcing steel bars, once a certain number of layers of temperature measuring element isolating strips are arranged, a layer of cooling water pipe is arranged in the plane direction of the bearing platform, and the operation of arranging the temperature measuring element isolating strips and the cooling water pipe in the process of binding the reinforcing steel bars is repeated until the binding of the reinforcing steel bars of the bearing platform is finished.
2. The construction process of a bridge pier cap according to claim 1, wherein: in the process of gradually pouring the concrete in a layered manner, water is introduced into the cooling water pipe on each layer of the concrete covered by the cooling water pipe to reduce the temperature.
3. The construction process of a bridge pier cap according to claim 2, wherein: and after the concrete is poured, determining the internal temperature distribution of the concrete of the bearing platform according to the detection values of different temperature measuring elements, and adjusting the water passing temperature and flow of different cooling water pipes according to the temperature distribution.
4. The construction process of a bridge pier cap according to claim 3, wherein: comparing the detection values of a plurality of temperature measurement elements in the area between two adjacent cooling water pipes, and increasing the water inlet temperature of the cooling water pipes and increasing the flow rate when the temperature measurement element corresponding to the highest detection value is positioned in the middle of the area and the difference value between the highest detection value and the lowest detection value is greater than a set threshold value; when the highest temperature detection value is positioned at one side of the area, the water inlet temperature of the cooling water pipe at the side is reduced.
5. The construction process of a bridge pier cap according to claim 4, wherein: when the detection value of the temperature measuring element exceeds the set maximum temperature value, the water inlet temperature of the cooling water pipe closest to the temperature measuring element is reduced, and the flow is increased.
6. The construction process of a bridge pier cap according to claim 5, wherein: the difference between the water pipes of the inlet and the outlet of the cooling water pipe is controlled between 5 ℃ and 10 ℃ until the peak value of the hydration heat of the concrete is reached, and the flow of the cooling water pipe is halved after the peak value is reached.
7. The construction process of a bridge pier cap according to claim 1, wherein: the upper wing plate is provided with circulation holes distributed along the length direction of the upper wing plate.
8. The construction process of a bridge pier cap according to claim 1, wherein: when laying condenser tube, every layer all sets up a plurality of condenser tubes that distribute side by side, and each condenser tube's water inlet all is connected with independent control's control valve.
9. The construction process of a bridge pier cap according to claim 8, wherein: the cooling water pipes adopt serpentine cooling pipes which are bent back and forth, and the water flowing directions of the cooling water pipes on the same layer are the same; and in the upper and lower adjacent layers, the water passing directions of the corresponding cooling water pipes in the vertical direction are opposite.
10. The construction process of a bridge pier cap according to claim 1, wherein: after the concrete is cured to reach the required strength, cement paste is introduced into the cooling water pipe to fill the cavity in the cooling water pipe.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115262974A (en) * | 2022-08-04 | 2022-11-01 | 深圳市市政工程总公司 | Intelligent control construction method for large-volume concrete cracks |
| CN115874831A (en) * | 2022-12-06 | 2023-03-31 | 中建八局第四建设有限公司 | Automatic temperature control method for mass concrete |
| CN117567174A (en) * | 2023-11-09 | 2024-02-20 | 中交二公局第一工程有限公司 | Rope tower foundation hydration heat dynamic control device of intelligent maintenance |
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