Heat preservation steel formwork device for pier column construction in low-temperature environment

Abstract

The utility model discloses a heat preservation steel formwork device for pier column construction in a low temperature environment, which comprises a steel formwork structure, a heating structure and a heat preservation structure, the heating structure and the heat preservation structure are arranged on the outer side of the steel formwork structure, and the heating structure is arranged between the steel formwork structure and the heat preservation structure; the heating structure comprises a fixing net and a heating wire, the fixing net is arranged on the outer side of the steel formwork structure, and the heating wire is laid on the fixing net. According to the utility model, the polyurethane polystyrene foam is used as a thermal insulation layer to be directly attached to the steel template, plays a role in covering, filling and fixing the heating structure, and forms an integral structure with the steel template, so that the heating and thermal insulation effects can be realized without additional operation during construction, and finally, the purpose of rapid construction in a low-temperature environment is realized; and the construction quality of the pier column is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a heat-insulating steel formwork device for pier column construction in a low-temperature environment. Background Art

[0002] When bridge piers are constructed in winter in high-latitude areas, in order to ensure the construction quality and progress, the conventional practice is to set up an insulation shed. The method is to set up a double-row frame around the pier, which serves as an operating frame and also as a support for the colored strips. Then, after covering it in place, an insulation shed is formed, and a hot air gun is placed in the shed to insulate the piers during the pouring process and after pouring, so that they can grow according to the conventional strength growth curve, thereby ensuring the quality of the piers. However, the above-mentioned approach has the problems of complex approach, high cost, and long cycle, which has a great impact on the construction progress and is no longer suitable for the current construction mode. Therefore, a template structure with a heating function such as CN210946520U has emerged, which provides heating and insulation functions during the pouring of concrete and improves construction efficiency. The utility model provides an insulation steel template device for pier construction in a low temperature environment to solve the above problems. Utility Model Content

[0003] The utility model provides a heat-insulating steel formwork device for pier column construction in a low-temperature environment, which has heating and heat-insulating functions and, as an integrated structure, simplifies construction operations and improves construction efficiency.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] An insulation steel formwork device for pier column construction in a low temperature environment comprises a steel formwork structure, a heating structure and an insulation structure, wherein the heating structure and the insulation structure are arranged outside the steel formwork structure, and the heating structure is located between the steel formwork structure and the insulation structure;

[0006] The heating structure comprises a fixed net and a heating wire, wherein the fixed net is arranged on the outer side of the steel formwork structure, and the heating wire is laid on the fixed net.

[0007] Furthermore, the steel formwork structure is composed of formwork units, adjacent formwork units are interconnected by screws, the formwork units include steel formwork and tension back ribs, the tension back ribs are spaced apart on the outside of the steel formwork, the insulation structure is filled in the steel formwork, and the tension back ribs are located on the outside of the insulation structure.

[0008] Furthermore, the steel formwork includes a panel, a connecting flange, ribs and stiffeners, the connecting flange is arranged on the end face of the panel, the ribs are arranged at intervals on the outside of the panel, the stiffeners are arranged at intervals on the outside of the arc position of the panel, and the tension back ribs are arranged on the ribs.

[0009] Furthermore, the fixing net is arranged on the outer surface of the panel, and the heat-insulating structure is filled between the ribs and the panel.

[0010] Furthermore, the back-pull ribs include back ribs and back-pull seats, the back ribs are arranged on the rib plates, and the back-pull seats are arranged at the ends of the back ribs.

[0011] Furthermore, the pulling seat and the back rib form an angle of 135°.

[0012] Preferably, the fixed mesh is a steel mesh, the heating wire is an alloy heating wire with a sheath, and the thermal insulation structure is a polyurethane foam layer.

[0013] Preferably, the fixed mesh is welded to the steel template, and the heating wire is tied to the fixed mesh.

[0014] The beneficial effects of the utility model are as follows:

[0015] Polyurethane foam is used as the insulation layer directly attached to the steel formwork, which covers, fills and fixes the heating structure, and forms an integrated structure with the steel formwork. No additional operation is required during construction to achieve heating and insulation effects, ultimately achieving the goal of rapid construction in a low-temperature environment and ensuring the construction quality of the pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic top view of the overall structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the heating structure setting state of the utility model;

[0019] Figure 4 This is a schematic diagram of the steel formwork assembly state of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of a template unit with arc edges of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of a template unit without arc edges of the utility model;

[0022] Figure 7 This is a schematic diagram of the back-pull structure of the utility model;

[0023] Figure 8 It is a schematic diagram of the heating structure of the utility model.

[0024] Figure numerals: 1. Steel formwork structure; 11. Steel formwork; 111. Panel; 112. Connecting flange; 113. Rib; 114. Rib plate; 12. Tie ribs; 121. Tie ribs; 122. Tie seat; 2. Heating structure; 21. Fixed net; 22. Heating wire; 3. Insulation structure. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings of the specification to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] 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 directions or positional relationships, are based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] like Figure 1 , 2 As shown in 3, an insulated steel formwork device for pier construction in a low-temperature environment includes a steel formwork structure 1, a heating structure 2 and an insulation structure 3, wherein the heating structure 2 and the insulation structure 3 are arranged on the outside of the steel formwork structure 1, and the heating structure 2 is located between the steel formwork structure 1 and the insulation structure 3.

[0028] The specific application condition of the utility model is to carry out the casting construction of bridge piers in a low temperature environment. A heating structure 2 and a heat preservation structure 3 are arranged on the outside of the steel formwork structure 1 of the formed pier. The heating structure 2 is used to realize the heating function, and the heat preservation structure 3 plays a heat preservation role after being heated to the required temperature.

[0029] like Figure 1 , 2As shown in , 3, 4, 5, and 6, the steel formwork structure 1 is composed of four formwork units. Adjacent formwork units are connected by screws to form a formwork structure. Each formwork unit includes a steel formwork 11 and a pair of back ribs 12. The back ribs 12 are arranged at intervals on the outside of the steel formwork 11 to tie adjacent formwork units. The steel formwork 11 includes a panel 111, a connecting flange 112, a rib plate 113, and a rib plate 114. The connecting flange 112 is arranged on the end face of the panel 111. The connecting flange 112 is used to connect the panels 111 on adjacent formwork units. The rib plates 113 are arranged at intervals on the outside of the steel formwork 11. The partition is arranged on the outside of the panel 111 to strengthen the structure of the panel 111, and forms a back groove together with the panel 111, so that the heating structure 2 can be placed in the groove, and the insulation structure 3 can be filled in the groove without interfering with the connection of adjacent template units. The rib plate 114 is arranged at intervals on the outside of the arc position of the panel 111 to strengthen the structure of the arc position of the panel 111. The back tension rib 12 is arranged on the rib plate 113, and a gap is reserved between the panel 111, which will not interfere with the filling of the insulation structure 3 and facilitate the oblique connection of the screw.

[0030] like Figure 1 , 3 As shown in Figures 5 and 7, the insulation structure 3 is filled in the steel formwork 11 and in the groove on the back of the panel 111, and the tension back rib 12 is located on the outside of the insulation structure 3; the tension back rib 12 includes a back rib 121 and a tension seat 122, and the back rib 121 is arranged on the rib 113 as a connecting structure of adjacent template units, and the tension seat 122 is arranged at the end of the back rib 121, and the two ends of the screw are respectively connected to the tension seat 122 on the adjacent template units to realize the connection of adjacent template units; the tension seat 122 and the back rib 121 form an angle of 135°, and the inclined tension seat 122 realizes the oblique connection of adjacent template units, which not only ensures the stability of the connection between adjacent template units and avoids structural interference, but also reduces the size of the entire template structure, which is convenient for installation and transportation.

[0031] like Figure 3 , 8 As shown, the heating structure 2 includes a fixed mesh 21 and a heating wire 22. The fixed mesh 21 is arranged on the outside of the steel formwork structure 1, is fitted on the outer surface of the panel 111, and is connected to the panel 111 by spot welding. The heating wire 22 is laid on the fixed mesh 21, is connected to the fixed mesh 21 by binding, and is fitted with the fixed mesh 21, and then fits on the outer surface of the panel 111.

[0032] Preferably, the panel 111 is a 6 mm thick steel plate, the connecting flange 112 is a 12*100 mm steel plate, the rib plate 113 is a 10# channel steel, the stiffener plate 114 is a 6-12 mm thick steel plate, the back rib 121 is a 20# channel steel, and two 20# channel steels are spliced ​​together. The bolts on the connecting flange 112 are M20*50 high-strength bolts, and the screws for diagonally tensioning adjacent template units are 25 fine-rolled threaded steel.

[0033] Preferably, the fixed mesh 21 is a steel mesh, the heating wire 22 is an alloy heating wire with a sheath, which is fully distributed on the back of the panel 111 according to the spacing requirements, and the thermal insulation structure 3 is a polyurethane foam layer. When the polyurethane foam is sprayed from an aerosol can, at room temperature of 20°C, the surface drying time is about 10 minutes, the full drying time is about 4-6 hours in summer, and it takes about 24 hours to be fully dry at about -10-0°C in winter.

[0034] The construction method of the utility model is as follows:

[0035] 1. Prefabricate the formwork unit. After prefabrication, transport it to the construction site together with the polyurethane foam and the heating structure 2;

[0036] 2. Weld steel bars on the template unit to form a fixed mesh 21, and tie the heating wires 22 to the fixed mesh. The spacing between the heating wires 22 is 100 mm.

[0037] 3. After checking the arrangement of the fixed net 21 and the heating wire 22, spray the polyurethane foam glue on the outside of the template unit to form the insulation structure 3, spray evenly and the effective insulation thickness is not less than 50mm;

[0038] 4. After the insulation structure 3 is completely dry, the processed formwork units are hoisted to the formwork position by a car crane and installed piece by piece. After all the formwork units are assembled, wait for concrete pouring;

[0039] 5. After the concrete strength meets the requirements, remove the formwork and transport it to the next construction site for reuse.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A heat-insulating steel formwork device for pier construction in a low-temperature environment, characterized in that: It comprises a steel formwork structure (1), a heating structure (2) and a thermal insulation structure (3), wherein the heating structure (2) and the thermal insulation structure (3) are arranged outside the steel formwork structure (1), and the heating structure (2) is located between the steel formwork structure (1) and the thermal insulation structure (3); The heating structure (2) comprises a fixed net (21) and a heating wire (22); the fixed net (21) is arranged outside the steel formwork structure (1), and the heating wire (22) is laid on the fixed net (21).

2. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 1 is characterized in that: The steel formwork structure (1) is composed of formwork units, adjacent formwork units are connected to each other via screws, the formwork units include a steel formwork (11) and a pair of back ribs (12), the pair of back ribs (12) are arranged at intervals on the outside of the steel formwork (11), the thermal insulation structure (3) is filled in the steel formwork (11), and the pair of back ribs (12) are located on the outside of the thermal insulation structure (3).

3. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 2 is characterized in that: The steel formwork (11) comprises a panel (111), a connecting flange (112), a rib plate (113) and a rib plate (114); the connecting flange (112) is arranged on the end surface of the panel (111); the rib plates (113) are arranged at intervals on the outside of the panel (111); the rib plates (114) are arranged at intervals on the outside of the arc position of the panel (111); and the back-tensioned ribs (12) are arranged on the rib plates (113).

4. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 3 is characterized in that: The fixing net (21) is arranged on the outer surface of the panel (111), and the heat-insulating structure (3) is filled between the rib plate (113) and the panel (111).

5. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 3 is characterized by: The back-pull rib (12) comprises a back rib (121) and a back-pull seat (122); the back rib (121) is arranged on the rib plate (113); and the back-pull seat (122) is arranged at the end of the back rib (121).

6. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 5 is characterized in that: The pulling seat (122) and the back rib (121) form an angle of 135°.

7. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 1 is characterized by: The fixed mesh (21) is a steel mesh, the heating wire (22) is an alloy heating wire with a sheath, and the thermal insulation structure (3) is a polyurethane foam layer.

8. The heat-insulating steel formwork device for pier construction in a low-temperature environment according to claim 1 is characterized by: The fixing net (21) is welded to the steel template (11), and the heating wire (22) is tied to the fixing net (21).

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