Concrete box type structure with inside and outside temperature difference adjusting function

Abstract

The utility model provides a concrete box type structure with the inside and outside temperature difference adjusting function, which comprises a box type beam and a conical ventilation pipe, a plurality of first reserved through holes penetrating inside and outside are arranged on a side web of the box type beam, and the conical ventilation pipe is fixedly arranged in the first reserved through holes. And the small-aperture end of the conical ventilation pipe faces the interior of the box chamber of the box beam. According to the concrete box-type structure, the temperature difference between the interior and the exterior of the box is automatically adjusted through the conical ventilation pipes arranged on the side web plates of the box-type beams, the temperature inside and outside the concrete box-type structure can be reduced under the condition that non-renewable resources are not consumed, and the concrete box-type structure is cleaner and more environmentally friendly compared with mechanical means; the structural temperature stress generated by the temperature difference can be effectively reduced, the configuration of common steel bars or prestressing tendons is reduced, and the economic and technical indexes of the concrete structure can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge design and construction, and particularly relates to a concrete box-type structure with the function of regulating the internal and external temperature difference. Background Art

[0002] Concrete box structures are widely used in bridge construction due to their outstanding torsional resistance and economical efficiency. However, concrete box structures are often exposed to natural conditions. Due to the poor thermal conductivity of the material itself, different temperature fields exist inside and outside the box structure. This temperature field is further complicated by the combined influence of solar radiation, geographical location, and climate.

[0003] In multiple statically indeterminate bridge structures, the temperature difference between the inside and outside of the box structure will generate temperature self-stress and temperature secondary internal force inside the concrete structure. In the calculation process of concrete box structures, the temperature difference between the inside and outside of the box structure is usually calculated in three modes: the sunshine mode and the cold wave mode in the operation phase, and the sunshine mode in the construction phase. The tensile stress generated by it is overcome by configuring ordinary steel bars, prestressed tendons, etc., to avoid cracking and failure of the box beam structure. However, there is no standard guidance for the temperature difference values ​​under the three modes, and it is easy to have the problem of taking too large values ​​during design, resulting in conservative design. In addition, ventilation holes of equal diameter are usually set at equal distances on the side walls of the concrete box structure during design to achieve ventilation inside and outside the box structure, but the actual ventilation and cooling effect is not obvious. Utility Model Content

[0004] The purpose of the utility model is to provide a concrete box structure with the function of regulating the temperature difference between the inside and the outside, which can at least solve some of the defects existing in the prior art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A concrete box structure with an internal and external temperature difference regulating function comprises a box beam and a tapered ventilation duct. The side web of the box beam is provided with a plurality of reserved through holes that penetrate inside and outside. The tapered ventilation duct is fixedly installed in the reserved through holes, and the small-aperture end of the tapered ventilation duct faces the box chamber of the box beam.

[0007] Furthermore, the plurality of reserved through holes on the side web are arranged in an array structure.

[0008] Furthermore, the shape and size of the reserved through hole 1 are the same as those of the tapered ventilation pipe.

[0009] Furthermore, a plurality of first bolts for anchoring to the side webs are welded on the outer surface of the tapered ventilation pipe.

[0010] Furthermore, a plurality of the first pegs are evenly distributed on the outer surface of the tapered ventilation pipe at equal intervals, and each of the first pegs is arranged perpendicular to the outer surface of the tapered ventilation pipe.

[0011] Furthermore, when the box beam is a single-box multi-chamber box, a plurality of reserved through holes 2 are provided on the middle webs of two adjacent box chambers, and ventilation pipes of equal diameter are fixedly installed in the reserved through holes 2.

[0012] Furthermore, a plurality of the reserved through holes 2 are arranged in an array structure on the middle web.

[0013] Furthermore, the shape and size of the reserved through hole 2 are the same as those of the equal-diameter ventilation pipe.

[0014] Furthermore, a plurality of second bolts for anchoring to the middle web are welded on the outer surface of the constant diameter ventilation pipe.

[0015] Furthermore, a plurality of the second pegs are evenly distributed on the outer surface of the equal-diameter ventilation pipe at equal intervals, and each of the second pegs is arranged perpendicular to the outer surface of the equal-diameter ventilation pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The concrete box structure with the function of regulating the temperature difference between the inside and outside provided by the present invention utilizes the conical ventilation pipes arranged on the side webs of the box beam to automatically regulate the temperature difference between the inside and outside of the box. It can reduce the internal and external temperatures of the concrete box structure without consuming non-renewable resources. Compared with mechanical means, it is cleaner and more environmentally friendly. It can also effectively reduce the structural temperature stress caused by the temperature difference, reduce the configuration of ordinary steel bars or prestressed tendons, and improve the economic and technical indicators of the concrete structure.

[0018] (2) The conical ventilation duct used in the present invention is a standard prefabricated component, which can be used as a template during construction to facilitate construction; it can also bear a certain degree of force without excessively weakening the bearing capacity of the entire cross-section.

[0019] (3) For large-span concrete structure bridges with long construction periods, temperature differences have a great influence on the construction control accuracy. The use of the concrete box structure of the utility model that can automatically adjust the temperature difference can effectively improve the construction accuracy of large-span concrete bridges.

[0020] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic elevation diagram of the concrete box structure of the utility model;

[0022] Figure 2This is a schematic diagram of the installation of a tapered ventilation pipe on the side web of a concrete box structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the installation of equal-diameter ventilation pipes on the middle web of the concrete box structure of the utility model;

[0024] Figure 4 This is a structural diagram of a tapered ventilation pipe in an embodiment of the present utility model;

[0025] Figure 5 It is a structural schematic diagram of the equal-diameter ventilation pipe in the embodiment of the present utility model.

[0026] Explanation of the accompanying reference numerals: 1. side web; 2. reserved through hole 1; 3. middle web; 4. reserved through hole 2; 5. conical ventilation pipe; 6. equal-diameter ventilation pipe; 7. first bolt; 8. second bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; in the description of this utility model, unless otherwise specified, "plurality" or "several" means two or more.

[0031] like Figure 1 、 Figure 2 and Figure 4 As shown, this embodiment provides a concrete box structure with the function of regulating the temperature difference between the inside and the outside, including a box beam and a tapered ventilation duct 5. The side web 1 of the box beam is provided with a plurality of reserved through holes 2 that penetrate inside and outside. The tapered ventilation duct 5 is fixedly installed in the reserved through hole 2, and the small-aperture end of the tapered ventilation duct 5 faces the box chamber of the box beam.

[0032] In this embodiment, when natural wind blows from one side of the bridge structure, the natural wind will pass through the pipe formed by the conical ventilation pipe 5 within a certain range on the concrete box structure. Since the conical ventilation pipe 5 is conical, its pipe air inlet is large and the air outlet is small, the ventilation cross-section is from large to small, and the wind flow rate passing through per unit time is consistent. After the natural wind passes through this channel, the speed will be increased.

[0033] According to Bernoulli's formula:

[0034]

[0035] P: gravitational potential energy; 1 / 2ρV 2 : kinetic energy, density ρ, velocity V; ρgh: pressure potential energy, gravitational acceleration g, height h; C: constant.

[0036] The basic principle is that gravitational potential energy + kinetic energy + pressure potential energy = constant;

[0037] After the natural wind is accelerated, a low-pressure area will be formed inside the box beam, and the external cold (warm) air will continue to squeeze into the box from the external high-pressure area, forcing the warm (cold) air inside the box to flow along the transverse and longitudinal directions. When the natural wind bypasses the structure, a stable low-pressure area will also be formed on the other side of the structure, and the air inside the box can be squeezed out by the air pressure on the other side. In this process, the external cold (warm) air will be neutralized with the warm (cold) air inside the box, thereby achieving the effect of regulating the internal and external temperatures. The concrete box structure of this embodiment uses the conical ventilation pipe 5 provided on the side web 1 of the box beam to automatically adjust the temperature difference between the inside and outside of the box. It can reduce the internal and external temperatures of the concrete box structure without consuming non-renewable resources. Compared with mechanical means, it is cleaner and more environmentally friendly. It can also effectively reduce the structural temperature stress caused by the temperature difference, reduce the configuration of ordinary steel bars or prestressed tendons, and improve the economic and technical indicators of the concrete structure.

[0038] Optimized implementation methods, such as Figure 2 As shown, the several reserved through holes 2 on the side web 1 are designed to be arranged in an array structure. Specifically, in this embodiment, the reserved through holes 2 on the side web 1 are arranged in a square array. This arrangement allows the conical ventilation ducts 5 to be arranged in an array on the side web 1, thereby making the air intake in the box even.

[0039] Furthermore, the shape and size of the reserved through hole 2 are designed to be the same as those of the conical ventilation duct 5. When the conical ventilation duct 5 is installed, the outer surface of the conical ventilation duct 5 fits tightly with the inner wall of the corresponding reserved through hole 2, ensuring that the wind on one side of the box beam can only enter the box chamber from the conical ventilation duct 5.

[0040] For the production and installation of the tapered ventilation duct 5, tapered round steel pipes of equal sections are prefabricated in batches in the factory according to the thickness of the side web 1 of the concrete box structure; during the construction of the box beam concrete segment, the tapered ventilation duct 5 is embedded in the side web 1, wherein the small-aperture end of the tapered ventilation duct 5 faces the inside of the box chamber, and the tapered ventilation duct 5 needs to form a reliable connection with the surrounding beam body steel bars when cast in situ, playing a temporary fixing role.

[0041] Preferably, Figure 4 As shown, several first studs 7 are welded to the outer surface of the tapered ventilation duct 5. These first studs 7 form a stud cluster and are used to anchor the tapered ventilation duct 5 to the side web 1 during installation. This allows the tapered ventilation duct 5 and the concrete of the side web 1 to form an integral whole, sharing the load and improving the load-bearing capacity of the side web 1. Optimally, the first studs 7 are evenly spaced and arranged perpendicular to the outer surface of the tapered ventilation duct 5.

[0042] In some embodiments, when the box beam is a single-box multi-chamber, Figure 1 、 Figure 2 and Figure 3 As shown, not only is it necessary to set a tapered ventilation pipe 5 on the side web 1 of the box beam, but also a plurality of reserved through holes 4 are designed to be set on the middle web 3 of the two adjacent box chambers, and a constant-diameter ventilation pipe 6 is fixedly installed in the reserved through holes 4. The constant-diameter ventilation pipe 6 is used to ensure ventilation of the two adjacent box chambers, thereby automatically adjusting the temperature difference between the box chambers.

[0043] The arrangement of the equal-diameter ventilation pipe 6 on the middle web 3 is consistent with the arrangement of the tapered ventilation pipe 5 on the side web 1. Specifically, Figure 3 As shown, a plurality of the reserved through holes 4 are designed to be arranged in an array structure on the middle web 3 , so that the equal-diameter ventilation pipes 6 are arranged in an array on the middle web 3 .

[0044] Optimally, the shape and size of the reserved through hole 2 4 are designed to be the same as those of the equal-diameter ventilation pipe 6 , which also ensures that when the equal-diameter ventilation pipe 6 is installed, the outer surface of the equal-diameter ventilation pipe 6 is tightly fitted with the inner wall of the corresponding reserved through hole 2 4 .

[0045] For the production and installation of the equal-diameter ventilation pipe 6, according to the thickness of the web 3 in the concrete box structure, equal-diameter round steel pipes of equal sections can also be prefabricated in batches in the factory. Figure 5 As shown, a plurality of second studs 8 are welded to the outer surface of the uniform ventilation pipe 6. These second studs 8 form a stud cluster and are used to anchor the uniform ventilation pipe 6 to the center plate 3 during installation. This allows the uniform ventilation pipe 6 and the concrete of the center plate 3 to form an integral whole, sharing the load and improving the bearing capacity of the center plate 3. Optimally, the plurality of second studs 8 are evenly spaced and distributed on the outer surface of the uniform ventilation pipe 6, and each second stud 8 is arranged perpendicular to the outer surface of the uniform ventilation pipe 6.

[0046] Preferably, the tapered ventilation pipe 5, the equal-diameter ventilation pipe 6, the first bolt 7 and the second bolt 8 are all treated with anti-corrosion measures during manufacture to increase their service life.

[0047] To sum up, the concrete box structure provided by the present invention forms low wind pressure inside the box and high wind pressure outside the box by arranging conical ventilation pipes on the side webs of the box beams, thereby promoting the exchange of air inside and outside the box, thereby achieving the effect of regulating the temperature difference between the inside and outside of the concrete box structure, thereby reducing the temperature stress of the concrete box structure caused by the temperature difference between the inside and outside.

[0048] The above examples are merely illustrative of the present invention and do not limit the scope of protection of the present invention. Any design that is identical or similar to the present invention falls within the scope of protection of the present invention.

Claims

1. A concrete box structure with internal and external temperature difference regulation function, characterized by: It includes a box beam and a tapered ventilation pipe. The side web of the box beam is provided with a plurality of reserved through holes that penetrate inside and outside. The tapered ventilation pipe is fixedly installed in the reserved through hole, and the small-aperture end of the tapered ventilation pipe faces the box chamber of the box beam.

2. The concrete box structure with internal and external temperature difference regulation function according to claim 1, characterized in that: The plurality of reserved through holes on the side web are arranged in an array structure.

3. The concrete box structure with internal and external temperature difference regulation function according to claim 1, characterized in that: The shape and size of the reserved through hole 1 are the same as those of the tapered ventilation pipe.

4. The concrete box structure with internal and external temperature difference regulation function according to claim 1, characterized in that: A plurality of first bolts for anchoring with the side webs are welded on the outer surface of the tapered ventilation pipe.

5. The concrete box structure with internal and external temperature difference regulation function according to claim 4, characterized in that: A plurality of first pegs are evenly distributed on the outer surface of the tapered ventilation pipe at equal intervals, and each of the first pegs is arranged perpendicular to the outer surface of the tapered ventilation pipe.

6. The concrete box structure with internal and external temperature difference regulation function according to claim 1, characterized in that: When the box beam is a single-box multi-chamber box, a plurality of reserved through holes 2 are provided on the middle webs of two adjacent box chambers, and ventilation pipes of equal diameter are fixedly installed in the reserved through holes 2.

7. The concrete box structure with internal and external temperature difference regulation function according to claim 6, characterized in that: A plurality of the reserved through holes 2 are arranged in an array structure on the middle web.

8. The concrete box structure with internal and external temperature difference regulation function according to claim 6, characterized in that: The shape and size of the reserved through hole 2 are the same as those of the equal-diameter ventilation pipe.

9. The concrete box structure with internal and external temperature difference regulation function according to claim 6, characterized in that: A plurality of second bolts for anchoring to the middle web are welded on the outer surface of the constant diameter ventilation pipe.

10. The concrete box structure with internal and external temperature difference regulation function according to claim 9, characterized in that: A plurality of the second pegs are evenly distributed on the outer surface of the equal-diameter ventilation pipe at equal intervals, and each of the second pegs is arranged perpendicular to the outer surface of the equal-diameter ventilation pipe.

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