Temporary support based on electrofusion removal

Abstract

A plurality of temporary supports are used for bridge supporting cast-in-place construction, each temporary support comprises a thermoplastic cushion block, a cast-in-place concrete block, a heating plate and an electric melting assembly, the heating plate is arranged in the cushion block, the electric melting assembly is electrically connected with the heating plate, the electric melting assembly enables the heating plate 2 to emit heat after being electrified, and the heating plate 2 emits heat after being electrified. The thermoplastic cushion block is softened and loses strength, and the effect of dismantling the temporary support is achieved. The problem that in the cast-in-place construction of the temporary support of the bridge, particularly after cast-in-place bridge forming, the lower support cannot be smoothly unloaded and unloaded is solved, and the device has the advantages of being simple, convenient, rapid in unloading, capable of being recycled and capable of avoiding waste.

Description

Technical Field

[0001] The utility model relates to the technical field of rapid force unloading of temporary supports after bridge completion, in particular to a temporary support based on electric melting removal. Background Art

[0002] In the cast-in-place construction of bridge bearings, the temporary bearings at the bottom of the bridge have large support reaction forces after the bridge is cast in place, and it is difficult to unload the force and remove the bearings smoothly. In this case, destructive methods such as oxy-acetylene gas cutting are usually used to cut them, resulting in material waste and greatly increased costs. How to provide a non-destructive, low-cost, simple and convenient method and device for rapid unloading and bearing removal is an urgent problem that scientific researchers need to solve. Utility Model Content

[0003] The purpose of the utility model is to propose a temporary support based on electric melting removal in view of the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a temporary support based on electric fusion dismantling, wherein a plurality of the temporary supports are used for cast-in-place construction of bridge supports, each of the temporary supports comprises a thermoplastic pad, a heating plate and an electric fusion assembly, wherein the heating plate is arranged in the pad, and the electric fusion assembly is electrically connected to the heating plate, and when the electric fusion assembly is energized, the heating plate is heated, so that the thermoplastic pad is softened and loses strength, thereby achieving the effect of dismantling the temporary support.

[0006] Furthermore, the electric fusion assembly includes a copper wire connecting tube, a heat shrinkable insulating tube and multiple strands of conductive wires, the multiple strands of conductive wires pass through the copper wire connecting tube, and the heat shrinkable insulating tube is arranged on the outer periphery of the copper wire connecting tube.

[0007] Furthermore, one end of the wire is electrically connected to the heating plate, and the other end of the wire is electrically connected to a power source.

[0008] Furthermore, the conductor is a copper wire conductor.

[0009] Furthermore, the power of the heating plate is not less than 50W.

[0010] Furthermore, the thermoplastic pad is a thermoplastic crystal soil pad.

[0011] Furthermore, the thermoplastic pad is in the shape of a cuboid.

[0012] Furthermore, the thermoplastic pad is in the shape of a cylinder.

[0013] Furthermore, during the cast-in-place construction of the bridge support, temporary supports are provided above and below the cast-in-place concrete blocks, the upper portion of the temporary support located above is provided with a prefabricated T-beam, and the lower portion of the temporary support located below is provided on a pad stone.

[0014] Furthermore, a plurality of the temporary supports are arranged along the transverse bridge direction, and the heating plates of the plurality of the temporary supports are connected in series through the wires.

[0015] The beneficial effects brought by the technical solution provided by the utility model are:

[0016] The utility model provides a temporary support based on electric melting removal, and multiple temporary supports are used for cast-in-place construction of bridge supports. Each temporary support includes a thermoplastic pad 1, a heating plate 2 and an electric melting assembly 3. The pad 1 is provided with a heating plate 2, and the electric melting assembly 3 is electrically connected to the heating plate 2. After the electric melting assembly 3 is powered on, the heating plate 2 is heated, so that the thermoplastic pad 1 softens and loses its strength, achieving the effect of removing the temporary support. The utility model solves the problem that in the cast-in-place construction of temporary bridge supports, especially the lower support after the bridge is cast in place, the force cannot be unloaded and the seat cannot be removed smoothly. It has the advantages of being simple and convenient, quickly unloading, and being recyclable to avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a temporary support based on electric melting removal of the utility model;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of a temporary support based on electric melting removal of the utility model;

[0019] Figure 3 This is a schematic diagram of the location of temporary bearings in the cast-in-place construction of bridge supports;

[0020] Figure 4 This is a schematic diagram of the electrical connections of multiple temporary bearings during cast-in-place construction of bridge supports.

[0021] In the figure: 1. Thermoplastic pad; 2. Heating plate; 3. Capacitor assembly; 31. Copper wire connecting tube; 32. Heat shrinkable insulating tube; 33. Wire; 4. Pad stone; 5. Prefabricated T-beam; 6. Temporary support; 7. Cast-in-place concrete block. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1-3As shown, the utility model provides a temporary support based on electric melting removal, multiple temporary supports 6 are used for cast-in-place construction of bridge supports, each temporary support includes a thermoplastic pad 1, a heating plate 2 and an electric melting assembly 3, a heating plate 2 is arranged in the pad 1, and the electric melting assembly 3 is electrically connected to the heating plate 2. When the electric melting assembly 3 is powered on, the heating plate 2 is heated, so that the thermoplastic pad 1 softens and loses strength, achieving the effect of removing the temporary support. The utility model solves the problem that in the cast-in-place construction of temporary bridge supports, especially the lower support after the bridge is cast-in-place, the force cannot be unloaded and the seat cannot be removed smoothly, and has the advantages of being simple and convenient, fast unloading, and recyclable to avoid waste.

[0024] In some embodiments, in order to achieve electrical connection between temporary supports, the electric fusion assembly 3 may include a copper wire connecting tube 31, a heat shrinkable insulating tube 32 and a multi-strand conductor 33, the multi-strand conductor 33 runs through the copper wire connecting tube 31, and a heat shrinkable insulating tube 32 is arranged on the outer periphery of the copper wire connecting tube 31.

[0025] In some embodiments, to ensure that the electrically connected circuit is not short-circuited, the wire 33 may be a copper wire, and the copper wire is selected to be no less than 4 square centimeters.

[0026] In some embodiments, in order to achieve insulation protection of the electrical connection, a heat shrinkable insulation tube 32 is sleeved on the outside of the copper wire connection tube 31 and is wrapped and insulated by flame heat shrinking.

[0027] In some embodiments, in order to obtain good thermoplasticity and condensation recoverable properties, and to have sufficient strength to support the superstructure under normal temperature conditions, the thermoplastic pad 1 can be a thermoplastic crystal soil pad. The preparation method of the thermoplastic crystal soil pad is as follows: heating the crystal soil is to put the crystal soil into a heating container for heating, and the heating time is 10-20 minutes, to avoid heating too long so that the crystal soil turns black and denatures, affecting the strength. In terms of mass content, when the crystal soil melts and is close to liquid, the crystal soil and coarse sand are poured into the crystal soil container at a mass ratio of 1:1.4, and the crystal soil and fine sand are poured into the crystal soil container at a mass ratio of 1:1.67, and stirred, and stir-fried to fry out impurities and bubbles, and then poured into the container for cooling. A crystal soil and sand mixed material is obtained. For further reference, Figure 1 The structure shown is to introduce the prepared crystal soil material into the lower part of the rectangular or elliptical cylinder mold, put in a heating plate, extend the heating plate wire from the reserved position of the template, and then pour the upper part of the crystal soil sand mixed material, and obtain a temporary support after solidification.

[0028] In some embodiments, in order to ensure that the heating temperature of the thermoplastic pad reaches the melting point and melts evenly, the power of the heating plate 2 is not less than 50W, the temperature is controlled between 105°C and 110°C, and the heating plate is placed in the center of the thermoplastic pad 1.

[0029] In some embodiments, in order to adapt to different working conditions and application scenarios, the shape of the thermoplastic pad 1 can be a cuboid or a cylinder.

[0030] In some embodiments, during the cast-in-place construction of different supports, temporary pads 1 are arranged above and below the cast-in-place concrete block 4, the upper part of the temporary pad 1 located above is provided with a prefabricated T-beam 5, and the lower part of the temporary pad 1 located below is provided on a pad stone 6.

[0031] In some embodiments, the transverse arrangement of the temporary supports is determined according to the construction and dismantling conditions, and the heating plates 2 of the temporary supports are connected in series through the wires (33), and the temporary supports can be connected in series in a single row or in multiple rows.

[0032] The working principle of the utility model is: using thermoplastic crystal soil material as the raw material for reaction (thermoplasticity refers to the property that a substance can flow and deform when heated, and can maintain a certain shape after cooling. Within a certain temperature range, it can be repeatedly heated to soften and cooled to harden), and preparing an ideal molecular structure and performance cubic mixture by continuously adjusting the amount of each functional monomer, so that the composite material prepared by the invention has better compression resistance, deformability, and temperature-adaptable deformability. After arranging heating and temperature-raising devices such as electric heating plates in the mold, the thermoplastic crystal soil is poured into the mold to prepare an electric fusion pad. Then, the electric fusion pad is arranged on the support at the larger support reaction force as shown in the bridge monitoring data. When the support is demoulded and removed after the bridge is completed, the power is turned on to heat and melt the thermoplastic crystal soil pad, and the sinking data of the melting pad is monitored at the same time, finally achieving the effect of quickly removing the support and avoiding the waste of damage due to the inability to unload the force. The method solves the problem that in the cast-in-place construction of bridges, especially after the bridge is cast-in-place, the lower support has a large support reaction force, which cannot be smoothly unloaded and removed, and can only be removed by destructive methods such as oxygen-acetylene gas cutting. The method has the advantages of being simple and convenient, quickly unloading, and recyclable to avoid waste.

[0033] The temporary support based on electric melting removal of the utility model is used for operation. The specific process is: arrange the thermoplastic crystal soil pad 6 above the pad stone 4 and below the prefabricated T-beam 5, with cast-in-place concrete 7 in the middle, arranged in the horizontal direction of the bridge. The temporary supports 6 at the same position are connected in series with a conductor 33, and multiple strands of copper wires are connected with a copper wire connecting tube and clamped with electrician pliers, and a heat shrink tube 32 is covered on the outside for insulation. The total power of the circuit in the series connection is the sum of the powers of each part. The selected wire should be determined according to the power to avoid overload and short circuit. Figure 4 As shown, the conductor 33 is arranged along the transverse bridge direction of the support and fixed on the steel frame. The specific arrangement method is: the conductor is first connected and arranged along the transverse bridge direction, and then the second row of test pieces are connected in series to form a "U"-shaped loop and finally connected to the voltage stabilizer, gate switch and power supply.

[0034] After all units have determined the monitoring data of the bridge superstructure construction and all parties have verified and calculated to ensure safety, the lower support demoulding will begin. After the site is cleared, the power supply is connected. No one is allowed to enter within ten meters of the power-on area. Two rows of thermoplastic crystal soil test blocks of temporary supports 6 are symmetrically melted and demoulded each time. Keep the site dry during the power-on process, and it is strictly forbidden to power on and dismantle the support in rainy weather. A special person is assigned to monitor the current and voltage data in the on-site area, and never exceed the rated maximum power of each part. A special person is assigned to monitor the electric fusion pads on the temporary supports in each power-on area outside the safe area. After the rows of electric fusion pads in the power-on area are melted and emptied, the power is turned off in time and the row of supports is dismantled.

[0035] For matters not mentioned above, the prior art applies.

[0036] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the utility model or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modification, equivalent replacement, improvement, etc. made to the above implementation methods based on the technical essence of the utility model should be included in the protection scope of the utility model.

Claims

1. A temporary support based on electric melting removal, wherein a plurality of said temporary supports (6) are used for cast-in-place construction of bridge supports, characterized in that: Each temporary support comprises a thermoplastic pad (1), a heating plate (2) and an electric fusion assembly (3); the pad (1) is provided with the heating plate (2); the electric fusion assembly (3) is electrically connected to the heating plate (2); when the electric fusion assembly (3) is energized, the heating plate (2) generates heat, causing the thermoplastic pad (1) to soften and lose strength, thereby achieving the effect of removing the temporary support.

2. The temporary support based on electric melting removal as claimed in claim 1, characterized in that: The electric fusion assembly (3) comprises a copper wire connection tube (31), a heat shrinkable insulation tube (32) and a plurality of wires (33); the plurality of wires (33) penetrate through the copper wire connection tube (31); and the heat shrinkable insulation tube (32) is arranged on the outer periphery of the copper wire connection tube (31).

3. The temporary support based on electric melting removal as claimed in claim 2, characterized in that: One end of the wire (33) is electrically connected to the heating plate (2), and the other end of the wire (33) is electrically connected to a power source.

4. The temporary support based on electric melting removal as claimed in claim 3 is characterized in that: The conductor is a copper wire conductor.

5. The temporary support based on electric melting removal as claimed in claim 3, characterized in that: The power of the heating plate (2) is not less than 50W.

6. The temporary support based on electric melting removal as claimed in claim 1, characterized in that: The thermoplastic cushion block (1) is a thermoplastic crystal soil cushion block.

7. The temporary support based on electric melting removal as claimed in claim 6, characterized in that: The thermoplastic pad (1) is in the shape of a cuboid.

8. The temporary support based on electric melting removal as claimed in claim 6, characterized in that: The thermoplastic pad (1) is in the shape of a cylinder.

9. The temporary support based on electric melting removal as claimed in claim 1, characterized in that: During the cast-in-place construction of bridge supports, the thermoplastic pads (1) are arranged above and below the cast-in-place concrete blocks (7), the upper portion of the thermoplastic pad (1) being provided with a prefabricated T-beam (5), and the lower portion of the thermoplastic pad (1) being provided on a cushion stone (4).

10. The temporary support based on electric melting removal as claimed in claim 2, characterized in that: A plurality of the temporary supports are arranged along the transverse bridge direction, and the heating plates (2) of a plurality of the thermoplastic pads (1) are connected in series via the conductive wires (33).

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