Accurate variable-temperature combined template suitable for temperature control of 0 # concrete block of cable-stayed bridge

Abstract

The utility model relates to an accurate variable-temperature combined template suitable for temperature control of a 0 # concrete block of a cable-stayed bridge, which is characterized in that a variable-temperature layer and a heat preservation and insulation layer are sequentially fixed on the outer side surfaces of two flange plates of an inner die from inside to outside, and a water pipe in the variable-temperature layer is externally connected with a cold and hot water all-in-one machine through a guide pipe; the cold and hot water all-in-one machine is used for supplying cold / hot water to the water pipe in the variable temperature layer so as to cool and heat the 0 # concrete block in the inner mold forming cavity. The method has the beneficial effects that the surface temperature of the concrete is accurately controlled when the 0 # concrete block of the cable-stayed bridge is poured, the internal and external temperature difference is kept within 25 DEG C, the negative influence of high-temperature and low-temperature environments on the pouring period of the 0 # concrete block of the cable-stayed bridge is reduced, that is, temperature cracks caused by the internal and external temperature difference of the large-size 0 # concrete block are reduced, and the construction quality of bridge concrete is ensured; the device can also be used for heat preservation and maintenance of 0 # concrete blocks of a cable-stayed bridge in winter, and the fire risk caused by aging of a traditional electric heating wire is reduced by adopting a mode of cooling and heating the concrete with cold / hot water.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering technical field, concretely relates to a kind of precision temperature-variable combined formworks suitable for cable-stayed bridge 0# concrete block temperature control. BACKGROUND

[0002] Cable-stayed bridge has the advantages of large span capacity, material saving, beautiful shape, etc., and plays an important role in large-span bridge type. The 0# concrete block of the main girder of the cable-stayed bridge is mostly a mass concrete block. The hydration heat reaction of the concrete can cause internal and external temperature difference of the 0# concrete block. According to the relevant specification requirements, if the internal and external temperature difference of the concrete exceeds 25℃, temperature cracks are easy to occur, which affects the safety and service life of the bridge structure. Therefore, accurately controlling the internal and external temperature difference of the 0# concrete block of the cable-stayed bridge is an important problem faced in the concrete pouring process.

[0003] During winter construction, low environmental temperature can cause problems such as prolonged concrete hardening time, decreased strength, and poor impermeability. Therefore, during low-temperature weather construction, electric heating insulation boards are often used to maintain the temperature of the concrete. However, the existing insulation boards use electric heating wires to heat up. The aged electric heating wires have a fire risk when in use.

[0004] In addition, during summer high-temperature construction, the overall temperature of the concrete is high. Although the upper surface of the 0# concrete block can be watered to reduce the temperature, the lower surface of the 0# concrete block cannot be cooled and maintained.

[0005] Therefore, it is one of the urgent problems for bridge engineering construction personnel to provide a precision temperature-variable combined formwork that can improve the low and high temperatures of the concrete surface. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to provide a precision temperature-variable combined formwork suitable for cable-stayed bridge 0# concrete block temperature control. The formwork can adjust the temperature of the concrete in real time during concrete pouring and maintenance, so as to ensure that the concrete is always at a relatively suitable maintenance temperature, which is beneficial to ensure the maintenance quality of the concrete, so as to overcome the shortcomings of the prior art.

[0007] The technical solution for solving the above technical problem is as follows: a precision temperature-variable combined formwork suitable for cable-stayed bridge 0# concrete block temperature control, comprising: an inner mold for forming a 0# concrete block, the inner mold is a steel mold, the outer side surfaces of the two flange plates of the inner mold are sequentially fixed with a temperature-variable layer and a heat-insulating layer from inside to outside, a water pipe in the temperature-variable layer is connected to a cold / hot water all-in-one machine through a conduit, and the cold / hot water all-in-one machine is used to supply cold / hot water to the water pipe in the temperature-variable layer to cool and heat the 0# concrete block in the inner mold forming cavity.

[0008] On the basis of the above technical scheme, the utility model further can make improvement as follows.

[0009] Further, the two flange plates of the inner mold are provided with a plurality of temperature sensors at different positions.

[0010] Further, the temperature changing layer comprises a plurality of temperature changing plates, a water pipe embedded in each temperature changing plate, and the outlet and inlet of the water pipe embedded in each temperature changing plate are arranged on the side surface of the temperature changing plate.

[0011] Further, the temperature changing plate is covered with a temperature reflecting film, and the reflecting direction of the temperature reflecting film is towards the inner mold forming cavity.

[0012] Further, the water pipe embedded in the temperature changing plate is arranged in a bending type.

[0013] Further, the water pipe embedded in the temperature changing plate is arranged in a bending type.

[0014] Further, a plurality of first threaded holes are arranged on the two flange plates of the inner mold at different positions, a plurality of second threaded holes are arranged on the temperature changing layer and the heat insulation layer at positions corresponding to the first threaded holes, and the heat insulation layer, the temperature changing layer and the inner mold are fixed by using a screw rod or a bolt screwed with the first threaded holes and the second threaded holes.

[0015] Further, the two flange plates of the inner mold are provided with transverse stiffening ribs and longitudinal stiffening ribs on the outer side surfaces, and the temperature changing plates are arranged in the cavities formed by the transverse stiffening ribs and the longitudinal stiffening ribs.

[0016] Further, a plurality of telescopic support rods are arranged on the outer side surfaces of the two flange plates of the inner mold, the upper end of each telescopic support rod is fixedly connected with the flange plate, the lower end of each telescopic support rod is fixedly connected with the bottom of the inner mold, and the upper end of each telescopic support rod is fixedly connected with a displacement sensor for monitoring the deflection of the flange plate.

[0017] Further, the heat insulation layer is made of one or a combination of a plurality of heat insulation and fireproof rock wool, fireproof polyurethane board and fireproof polystyrene board.

[0018] The utility model discloses a beneficial effect is: can according to construction demand to the template is raised, the temperature is lowered, when the cable -stayed bridge 0 concrete block is poured, the concrete surface temperature is accurately controlled, and the internal and external temperature difference keeps within 25 DEG C, reduces the negative influence of high temperature and low temperature environment to the cable -stayed bridge 0 concrete block pouring period, namely reduces the temperature crack of the internal and external temperature difference of mass 0 concrete block, guarantees the construction quality of bridge concrete, can also be used to winter cable -stayed bridge 0 concrete block heat preservation, adopts the cold / hot water to the concrete and carries out the cooling and the heating mode, reduces the fire risk of traditional electric heating wire aging existence, improves the construction safety, in addition, the temperature change layer and the heat -preserving and heat -insulating layer can be integrally detached from the inner template surface, and the use in different construction environment is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is part structure diagram of the utility model discloses the precise temperature change combination template suitable for cable -stayed bridge 0 concrete block temperature control.

[0020] Figure 2 It is the combination diagram of temperature change layer and heat -preserving and heat -insulating layer of the utility model.

[0021] Figure 3 It is the structure diagram of temperature change plate of the utility model.

[0022] Figure 4 It is the series connection diagram of temperature change plate of the utility model.

[0023] In the drawings, the component list represented by each sign is as follows:

[0024] 1, inner mould, 110, first threaded hole, 120, transverse stiffening rib, 130, longitudinal stiffening rib, 2, temperature change layer, 210, temperature change plate, 211, water pipe, 2111, water outlet, 2112, water inlet, 220, temperature reflection film, 230, second threaded hole, 3, heat -preserving and heat -insulating layer, 4, cold and hot water all -in -one, 5, catheter, 6, telescopic support rod, 7, displacement sensor, 8, temperature sensor, 9, wire. DETAILED DESCRIPTION

[0025] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0026] Example 1

[0027] As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a precise temperature-changing composite template suitable for temperature control of #0 concrete blocks in cable-stayed bridges includes: an inner mold 1, used to form #0 concrete blocks, made of steel (though other materials with sufficient strength and thermal conductivity may also be used); a temperature-changing layer 2 and a thermal insulation layer 3 are fixed sequentially from the inside to the outside of the two flanges of the inner mold 1. This can be understood as follows: the temperature-changing layer 2 is located outside the inner mold 1, used for unidirectional heating and cooling of the #0 concrete blocks within the forming cavity of the inner mold 1; the thermal insulation layer 3 is located outside the temperature-changing layer 2, used to prevent ambient temperature from entering and affecting the temperature of the temperature-changing layer 2; and the temperature-changing layer 2 contains water... Pipe 211, water pipe 211 can carry cold or hot water to cool or heat the variable temperature layer 2. The water pipe 211 in the variable temperature layer 2 is connected to the external hot and cold water integrated machine 4 through the conduit 5. The hot and cold water integrated machine 4 is used to supply cold / hot water to the water pipe 211 in the variable temperature layer 2 to cool or heat the 0# concrete block in the molding cavity of the inner mold 1. The water temperature in the water pipe 211 is precisely controlled by the temperature control module in the hot and cold water integrated machine 4. The hot and cold water integrated machine 4 adopts existing technology. For example, supplying cold water is for cooling, thereby cooling the concrete in the inner mold 1, and supplying hot water is for heating, thereby heating the concrete in the inner mold 1. Of course, the use of other media is not excluded.

[0028] Example 2

[0029] like Figure 1 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0030] Multiple temperature sensors 8 are fixed at different positions on the outer sides of the two flanges of the inner mold 1. The temperature sensors 8 are electrically connected to the temperature control module of the hot and cold water unit 4. Specifically, the temperature sensors 8 are electrically connected to the temperature control module of the hot and cold water unit 4 through wires 9. The temperature sensors 8 can collect the temperature information of the surface of the inner mold 1, and thus indirectly obtain the concrete temperature information. The temperature sensors 8 send the temperature information to the temperature control module of the hot and cold water unit 4. According to the value of the temperature sensors 8, the temperature control module will automatically adjust the output water temperature of the hot and cold water unit 4 according to the preset concrete curing program, thereby ensuring the surface temperature of the concrete.

[0031] Example 3

[0032] like Figure 2 , Figure 3 , Figure 4 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0033] The temperature-variable layer 2 comprises a plurality of temperature-variable plates 210, a water pipe 211 embedded in the temperature-variable plates 210, and water outlets 2111 and water inlets 2112 of the water pipe 211 embedded in the temperature-variable plates 210, which are arranged outside the side surfaces of the temperature-variable plates 210, so as to facilitate the subsequent connection of the pipes 5. The water outlets 2111 and the water inlets 2112 of the plurality of temperature-variable plates 210 and the cold and hot water integrated machine 4 are connected in series through the pipes 5 to form a complete water circulation loop. For example, if there are two temperature-variable plates 210, the water inlet 2112 of the first temperature-variable plate 210 is connected to the water outlet of the cold and hot water integrated machine 4 through the pipe 5, the water outlet 2111 of the first temperature-variable plate 210 is connected to the water inlet 2112 of the second temperature-variable plate 210 through the pipe 5, and the water outlet 2111 of the second temperature-variable plate 210 is connected to the water return end of the cold and hot water integrated machine 4 through the pipe 5, thereby forming a complete water circulation loop. If there are other numbers of temperature-variable plates 210, they can also be connected in a similar manner. This is only an exemplary description.

[0034] Furthermore, the temperature-variable plates 210 are covered with temperature reflection films 220, and the reflection direction of the temperature reflection films 220 is towards the forming cavity of the inner mold 1, i.e. towards the 0# concrete block in the forming cavity of the inner mold 1.

[0035] In addition, the water pipe 211 embedded in the temperature-variable plates 210 is arranged in a bending type, which can effectively prolong the water flow time in the water pipe 211 embedded in the temperature-variable plates 210, so as to better cool and heat the 0# concrete block in the forming cavity of the inner mold 1. In this embodiment, the water pipe 211 embedded in the temperature-variable plates 210 is arranged in a bending type with multiple U-shaped sections. Of course, other arrangements are not excluded. This is only an exemplary description.

[0036] Embodiment 4

[0037] As shown in Figure 1 , Figure 3 , Figure 4 This embodiment is a further improvement based on any one of embodiments 1-3, and the specific improvements are as follows:

[0038] A plurality of first threaded holes 110 are formed on the two flange plates of the inner mold 1 at different positions, and a plurality of second threaded holes 230 are formed on the temperature-variable layer 2 and the heat-insulating layer 3 at positions corresponding to the first threaded holes 110. A screw rod or a bolt is sequentially screwed into the second threaded holes 230 of the heat-insulating layer 3 and the temperature-variable layer 2, and then screwed into the first threaded holes 110 of the inner mold 1, so as to assemble the heat-insulating layer 3, the temperature-variable layer 2 and the inner mold 1 together to form a whole, and the screw rod or the bolt is very convenient for disassembly and installation.

[0039] Embodiment 5

[0040] AsFigure 1 As shown in the drawings, the embodiment is a further improvement on the basis of embodiment 3, as follows:

[0041] The two flange plates of the inner mold 1 are fixed with transverse stiffening ribs 120 and longitudinal stiffening ribs 130 on the outer sides, which can effectively enhance the strength of the inner mold 1, and the temperature changing plate 210 is in the cavity formed by the transverse stiffening ribs 120 and the longitudinal stiffening ribs 130.

[0042] Embodiment 6

[0043] As shown in the drawings, the embodiment is a further improvement on the basis of any one of embodiments 1-5, as follows: Figure 1

[0044] The two flange plates of the inner mold 1 are respectively arranged with a plurality of telescopic support rods 6, which can freely extend in the length direction, the upper end of the telescopic support rod 6 is fixedly connected with the flange plate, the lower end of the telescopic support rod 6 is fixedly connected with the bottom of the inner mold 1, and the upper end of the telescopic support rod 6 is fixedly connected with the displacement sensor 7, so as to monitor the deflection of the flange plate, that is, to monitor the deformation of the flange plate.

[0045] Embodiment 7

[0046] As shown in the drawings, the embodiment is a further improvement on the basis of any one of embodiments 1-6, as follows: Figure 2

[0047] The heat preservation and insulation layer 3 adopts one or a combination of more than one of heat preservation and fireproof rock wool, fireproof polyurethane board and fireproof polystyrene board.

[0048] A method for using a precise temperature changing combined mold suitable for temperature control of 0# concrete blocks of cable-stayed bridges, as follows:

[0049] Step one, install the inner mold 1 and reinforce it with telescopic support rods 6, install temperature sensors 8 in the predetermined area of the inner mold 1, and connect all the temperature sensors 8 to the temperature control module of the cold and hot water all-in-one machine 4 with wires;

[0050] Step two, install the temperature changing plate 210 into the cavity formed by the transverse stiffening ribs 120 and the longitudinal stiffening ribs 130 of the inner mold 1, then install the heat preservation and insulation layer 3, and fix it by screwing or bolting through the second threaded hole 230 and the first threaded hole 110, and connect the water outlet 2111 and the water inlet 2112 of the plurality of temperature changing plates 210 of the temperature changing layer 2 and the cold and hot water all-in-one machine 4 through the conduit 5 to form a complete water circulation loop;

[0051] ​​Step three, according to the construction requirement, cold and hot water integrated machine 4 is used to carry out cold water or hot water to the pre-buried water pipe 211 of the temperature change plate 210, and according to the temperature information collected by the temperature sensor 8, the water temperature is adjusted by the cold and hot water integrated machine 4, so that the temperature of the surface of the 0# concrete block in the forming cavity of the inner mold 1 meets the construction requirement;

[0052] Step four, when the strength of the 0# concrete block meets the requirement, the cold and hot water integrated machine 4 stops water supply, and the temperature change layer 2 and the heat preservation and insulation layer 3 are removed.

[0053] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A precision temperature-controlled composite formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges, characterized in that, include: The inner mold (1) used to form 0# concrete blocks is made of steel template. The two flanges of the inner mold (1) are fixed with a temperature-changing layer (2) and a heat insulation layer (3) from the inside to the outside. The water pipe (211) in the temperature-changing layer (2) is connected to a hot and cold water integrated machine (4) through a conduit (5). The hot and cold water integrated machine (4) is used to supply cold / hot water to the water pipe (211) in the temperature-changing layer (2) to cool and heat up the 0# concrete blocks in the forming cavity of the inner mold (1).

2. The precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 1, characterized in that: Multiple temperature sensors (8) are fixed at different positions on the outer sides of the two flanges of the inner mold (1), and the temperature sensors (8) are electrically connected to the temperature control module of the hot and cold water integrated machine (4).

3. The precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 1, characterized in that: The variable temperature layer (2) includes: multiple variable temperature plates (210), water pipes (211) are pre-embedded in the variable temperature plates (210), the outlet (2111) and inlet (2112) of the water pipes (211) pre-embedded in the variable temperature plates (210) are respectively located on its side, and the outlet (2111) and inlet (2112) of the multiple variable temperature plates (210) of the variable temperature layer (2) and the hot and cold water integrated machine (4) are connected end to end through the conduit (5) to form a complete water circulation loop.

4. The precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 3, characterized in that: The temperature plate (210) is covered with a temperature reflective film (220), and the reflection direction of the temperature reflective film (220) is towards the forming cavity of the inner mold (1).

5. A precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 3, characterized in that: The water pipes (211) embedded in the temperature-changing plate (210) are arranged in a bent manner.

6. A precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 5, characterized in that: The water pipe (211) embedded in the temperature plate (210) is arranged in a multi-segment U-shape.

7. A precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 3, characterized in that: Multiple first threaded holes (110) are opened at different positions on the two flange plates of the inner mold (1). Second threaded holes (230) are opened at the corresponding positions of the first threaded holes (110) on the temperature-changing layer (2) and the heat insulation layer (3). The heat insulation layer (3), the temperature-changing layer (2) and the inner mold (1) are fixed by screws or bolts that are threaded to the first threaded holes (110) and the second threaded holes (230).

8. A precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 3, characterized in that: The inner mold (1) has transverse stiffening ribs (120) and longitudinal stiffening ribs (130) fixed on the outer surfaces of the two flanges. The temperature plate (210) is located in the cavity formed by the transverse stiffening ribs (120) and the longitudinal stiffening ribs (130).

9. A precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 1, characterized in that: Multiple telescopic support rods (6) are arranged on the outer sides of the two flanges of the inner mold (1). The upper end of the telescopic support rod (6) is fixedly connected to the flange, and the lower end of the telescopic support rod (6) is fixedly connected to the bottom of the inner mold (1). A displacement sensor (7) for monitoring the deflection of the flange is fixed to the upper end of the telescopic support rod (6).

10. A precise temperature-changing combined formwork for temperature control of No. 0 concrete blocks in cable-stayed bridges according to claim 1, characterized in that: The thermal insulation layer (3) is made of one or more of the following: thermal insulation and fireproof rock wool, fireproof polyurethane board, and fireproof polystyrene board.

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