CN114960724A - Magnetic drive control adjustable bearing platform steel formwork and construction method thereof - Google Patents

Magnetic drive control adjustable bearing platform steel formwork and construction method thereof Download PDF

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Publication number
CN114960724A
CN114960724A CN202210598448.2A CN202210598448A CN114960724A CN 114960724 A CN114960724 A CN 114960724A CN 202210598448 A CN202210598448 A CN 202210598448A CN 114960724 A CN114960724 A CN 114960724A
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Prior art keywords
steel plate
steel
side steel
electromagnet
magnetic
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黄家辉
朱翔
何宗成
张瑞松
黄亮
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Zhejiang Titan Design & Engineering Co ltd
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Zhejiang Titan Design & Engineering Co ltd
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E02D27/14—Pile framings, i.e. piles assembled to form the substructure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The invention discloses a magnetic force drive control adjustable bearing platform steel template and a construction method thereof, and the magnetic force drive control adjustable bearing platform steel template comprises a magnetic force drive control device, a combined side steel plate and a long side steel plate, wherein the magnetic force drive control device comprises an electromagnet, the combined side steel plate and the long side steel plate are combined to form the bearing platform steel template, the electromagnet is arranged on the bearing platform steel template, the electromagnet is used as a main control center, the combined side steel plate and the long side steel plate are integrally formed into a closed magnetic loop by controlling the current of the electromagnet, and then the connecting force between the steel templates is controlled, so that the templates are effectively connected. The invention adopts electromagnetic force as connecting force, the connection operation is simple, and the power supply is turned off during the form removal period to eliminate the electromagnetic connecting force and achieve the purpose of quickly removing the form of the steel form; the overall size of the bearing platform is adjusted by adopting a combined connection mode of a combined steel plate and a strip steel plate, so that the purpose of adapting to multiple sizes of the bearing platform is achieved; the method is simple and convenient, has low cost and good stability, and can make up the defects of the traditional steel die.

Description

Magnetic drive control adjustable bearing platform steel formwork and construction method thereof
Technical Field
The invention belongs to the technical field of template design and construction in constructional engineering, and particularly relates to a magnetic drive control adjustable cushion cap steel template and a construction method thereof.
Background
In the basic design of construction engineering projects, a cap pile foundation is one of the most common foundation forms. In the traditional form of the bearing platform template, the wood template and the traditional steel template are the most common: the wood pattern is a template made of wood, and has the advantages of relatively light weight, relatively low price, no modulus limitation during use, capability of being processed as required, and low reusability; the steel mould is a template made of steel plates, section steel and the like, has the advantages of multiple turnover times, high strength and good quality, obviously reduces the removal of pore water pressure and air bubbles in concrete pressure with the traditional sealing templates such as wood, plywood or steel plates and the like, and forms an ideal rough interface after the concrete in the steel template structure is poured and formed, but has the defects of difficult template erection, higher template customization cost, complex template removal technology and the like.
On the premise, how to overcome various defects of the traditional cushion cap steel template has great significance to the cushion cap template construction technology.
Chinese patent CN206883869U provides a method for splicing a bottom plate and a side plate in a combined manner, but does not improve the characteristic of complicated mold construction technology; chinese patent CN215279768U discloses a reinforced steel mold, which is reinforced and assembled by arranging a reinforcing structure, and although the assembling strength of the steel mold is enhanced, it lacks adjustable and multiple utilization characteristics; chinese patent CN210857999U discloses an adjustable turnover type steel mould for column pier, which is provided with an adjusting plate, and the mould is adaptive to multiple sizes, but the adjusting plate of the mould is added, and the difficulty of mould removal and the defect of high cost are added.
In conclusion, the design of the steel die related to the above patents has the characteristics of inconvenient die removal, incapability of adjustment, incapability of adapting to multiple sizes or higher cost and the like.
Disclosure of Invention
Aiming at the defects of unchanged disassembly, unadjustability, high cost and the like of a cushion cap steel template in the prior art, the invention aims to provide a magnetic drive control adjustable cushion cap steel template and a construction method thereof.
In order to achieve the purpose, the following technical scheme is provided:
the utility model provides an adjustable cushion cap steel form of magnetic drive control, includes magnetic drive controlling means, combination side steel sheet and rectangular side steel sheet, and magnetic drive controlling means includes the electro-magnet, and combination side steel sheet and rectangular side steel sheet combination constitute the cushion cap steel form, and the electro-magnet is installed on the cushion cap steel form, uses the electro-magnet as the main control center, through controlling the electro-magnet electric current size, makes combination side steel sheet and rectangular side steel sheet whole formation closed magnetic circuit, and then controls the connecting force between the steel form, makes the template effectively connect.
Furthermore, the magnetic drive control device also comprises a direct current power supply and a lead, wherein the direct current power supply is connected with the electromagnet through the lead, an electromagnet preformed hole and a preformed wire hole are formed in the outer side of the combined side steel plate and used for installing the electromagnet, and the preformed wire hole is used for penetrating through the lead.
Furthermore, the magnetic core of the electromagnet is made of silicon steel and has good magnetic conductivity, the packaging shell is arranged outside the electromagnet and made of plastic and used for electric field insulation and leakage prevention, more coils are required to be wound inside the electromagnet, and when the current controls the magnetic field, the electromagnet can be characterized by small current, multiple turns and high magnetic field.
Furthermore, the long-strip side steel plate is an integrated steel plate, the length of the integrated steel plate is greater than the actual size of the bearing platform, so that the combined side steel plate can be connected to any position in the middle of the integrated steel plate, and the purpose of transverse extension of the whole die is achieved; the combined side steel plate comprises a plurality of combined steel plates, and the purpose of longitudinal extension of the whole die is achieved by connecting the steel plates with different numbers.
Furthermore, scales are arranged on the long side steel plates.
A construction method for controlling an adjustable cushion cap steel template through magnetic drive comprises the following steps:
1) connecting the magnetic core with a coil, packaging the magnetic core by using a packaging shell, connecting the coil with a direct current power supply after the coil passes through a reserved line hole through a wire, and fixing the electromagnet on a reserved hole of the electromagnet of the combined side steel plate;
2) erecting and fixing the long side steel plates at two sides;
3) determining the number of the combined side steel plates according to the required size, and finishing erection;
4) turning on a direct current power supply to connect the magnetic circuits, forming a magnetic closed loop between the steel plates, and magnetically connecting the steel plates on each side;
5) laying a plastic film on the inner side of the steel plate for current insulation;
6) pouring concrete, and leveling on the designated scales;
7) and (5) maintaining, then disconnecting the circuit, enabling the long side steel plate and the combined side steel plate to lose magnetic connection and to topple outwards, and automatically completing form removal.
Further, the present invention can be characterized as using Maxwell's suction formula
Figure BDA0003669025140000021
In the formula, mu is the vacuum magnetic permeability and is taken as 4 pi x10 -7 S is the sectional area of the joint of the sectional areas of the long side steel plates or the combined side steel plates, and the unit is m 2 Kf is a magnetic leakage coefficient, 1.5 is taken, delta is an air gap length, the air gap length of a magnetic loop formed by the method is mainly expressed as an assembly error between the pre-buried electromagnet and the side steel plate, the assembly error is 1.5mm, N is the number of turns of a coil, the unit is turns, I is a coil current, and the unit is A, and the formula can find that when the number and the height of the combined side steel plate are increased, the electromagnetic force can be increased by controlling the current or the number of turns of the coil, so that the connecting force between the templates is increased, and the side wall overturn of the whole steel template is limited; meanwhile, after the combined side steel plate and the long-strip side steel plate are connected through electromagnetic force, no air gap exists, only the assembly error between the electromagnet and the side steel plate exists, the magnetic conductivity of iron is hundreds times of that of air, the loss of the electromagnetic force can be effectively reduced, and the purpose of closed loop of the whole magnetic circuit is achieved.
When there is no top load, the cohesion is 0, and the internal friction angle is 30 degrees, the lateral pressure of the concrete can be expressed as FN ═ α pbch
In the formula, alpha is the active pressure coefficient of concrete, and 1/3 is taken
P is the volume weight of the concrete, and is 25KN/m 3
h is the height of the bearing platform
b is the length of the bearing platform steel plate
C is the width of the bearing platform steel plate.
When the concrete lateral pressure FN and the electromagnetic acting force F act together, namely 2F is larger than or equal to FN, the steel template cannot overturn, and bc/L is smaller than or equal to 0.0003(NI) through simplification 2
I.e. I ≧ (bc/L/0.0003) 0.5 /N
That is, the number of turns N of the coil of the electromagnetic field and the energizing current I are mainly related to the length and width of the bearing platform template and the thickness of the connecting part.
The invention has the beneficial effects that:
1) the electromagnet is pre-embedded on the combined side steel plate of the steel mould, during the use of the mould, the electromagnet is used as a main control center, the combined side steel plate and the long side steel plate are integrally formed into a closed magnetic loop by controlling the current of the electromagnet, and the connection force between the steel mould plates is controlled by current drive so as to adapt to the connection of the side mould plates with different sizes; meanwhile, the power supply is turned off during the form removal period to eliminate the electromagnetic connecting force and achieve the purpose of quickly removing the form of the steel form;
2) the overall size of the bearing platform is adjusted by adopting a combined connection mode of the combined steel plate and the strip steel plate, so that the purpose of adapting to multiple sizes of the bearing platform is achieved, and the method has the advantages of simplicity, convenience, low cost, good stability in form removal and the like, and can make up for the defects of the traditional steel mold.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the electromagnet of the present invention;
fig. 3 is a schematic view of the opening of the combination side steel plate of the present invention.
In the figure: 1. combining side steel plates; 2. a long side steel plate; 3. an electromagnet; 4. a direct current power supply; 5. a wire; 11. reserving a hole in the electromagnet; 12. and reserving wire holes.
Detailed Description
The invention will be further described with reference to the following examples and the accompanying drawings, without limiting the scope of the invention thereto.
As shown in fig. 1, a magnetic force drive control adjustable bearing platform steel template comprises a combined side steel plate 1, a strip side steel plate 2, an electromagnet 3, a direct current power supply 4 and a lead 5, wherein the combined side steel plate 1 is formed by combining a plurality of steel plates, the combined side steel plate 1 and the strip side steel plate 2 enclose the bearing platform steel template, the strip side steel plate 2 is an integrated steel plate, the length of the integrated steel plate is greater than the actual size of a bearing platform, so that the combined side steel plate 1 can be connected to any position in the middle of the integrated steel plate to achieve the purpose of transverse extension of the whole die; as shown in fig. 3, electromagnet preformed hole 11 and preformed hole 12 have all been seted up to the outside portion of every steel sheet of combination side steel sheet 1, electromagnet preformed hole 11 is used for installing electromagnet 3, as shown in fig. 2, the magnetic core of electromagnet 3 is the silicon steel, the outside of electromagnet 3 is equipped with the encapsulation shell, the encapsulation shell is the plastics material, electromagnet 3 is connected with wire 5, wire 5 passes preformed hole 12 and is connected with dc power supply 4, be equipped with the scale on rectangular side steel sheet 2, use electromagnet 3 as the main control center, through controlling the 3 electric currents of electromagnet size, make combination side steel sheet 1 and rectangular side steel sheet 2 whole form closed magnetic circuit, and then the connecting force between the control steel template, make the template carry out effective connection.
Example 1
1) Connecting the magnetic core with a coil, packaging the magnetic core by using a packaging shell, connecting the coil with a direct current power supply 4 after passing through a reserved line hole 12 through a lead 5, and fixing the electromagnet 3 on an electromagnet reserved hole 11 of the combined side steel plate 1;
2) the long side steel plates 2 at both sides are erected and fixed, and the size of the long side steel plate 2 is 10mmx1200mmx1000mm
3) The size of the concrete bearing platform needing to be poured is 1000mmx1000mmx1000mm, the number of the combined side steel plates 1 is determined to be 4, the size is 10mmx250mmx1000mm, and erection is completed;
4) the dc power supply 4 is turned on, the number of turns of the coil is 500, the current is 1.5A, and the calculated value of I is greater than (1x1/0.01/0.0003) 0.5 1.15A (200 mm of the long side steel plate 2 is most taken out and does not participate in the magnetic circuit), the magnetic circuits are connected, a magnetic closed circuit is formed between the steel plates, and the side steel plates are connected by magnetic force;
5) laying a plastic film on the inner side of the steel plate;
6) pouring concrete, and leveling on the designated scales;
7) and (5) maintaining, then disconnecting the circuit, enabling the long side steel plate 2 and the combined side steel plate 1 to lose magnetic connection and tilt outwards, and automatically completing form removal.
Example 2
1) Connecting the magnetic core with a coil, packaging the magnetic core by using a packaging shell, connecting the coil with a direct current power supply 4 after passing through a reserved line hole 12 through a lead 5, and fixing the electromagnet 3 on an electromagnet reserved hole 11 of the combined side steel plate 1;
2) erecting and fixing the long side steel plates 2 at two sides, wherein the size of each long side steel plate 2 is 10mmx1700mmx1500 mm;
3) the size of the concrete bearing platform to be poured is 1500mmx1500mmx1500mm, the number of the combined side steel plates 1 is determined to be 5, the size is 10mmx300mmx1000mm, and erection is completed;
4) the dc power supply 4 is turned on, the number of turns of the coil is 500 turns, the current is 2A, and the calculated value of the current I is greater than (1.5 × 1.5/0.01/0.0003) 0.5 1.73A (200 mm of the long side steel plate 2 is most taken out and does not participate in the magnetic loop), the magnetic paths are connected, a magnetic closed loop is formed between the steel plates, and the side steel plates are connected by magnetic force;
5) laying a plastic film on the inner side of the steel plate;
6) pouring concrete, and leveling on the designated scales;
7) and (4) maintaining, then disconnecting the circuit, enabling the long side steel plate 2 and the combined side steel plate 1 to lose magnetic connection and to topple outwards, and automatically completing form removal.
Example 3
1) Connecting the magnetic core with a coil, packaging the magnetic core by using a packaging shell, connecting the coil with a direct current power supply 4 after passing through a reserved line hole 12 through a lead 5, and fixing the electromagnet 3 on an electromagnet reserved hole 11 of the combined side steel plate 1;
2) erecting and fixing the long side steel plates 2 at two sides, wherein the size of the long side steel plates 2 is 10mmx2200mmx2000 mm;
3) the size of the concrete bearing platform to be poured is 2000mmx2000mmx2000mm, the number of the combined side steel plates 1 is determined to be 4, the size is 10mmx500mmx1000mm, and erection is completed;
4) the DC power supply 4 is turned on, the number of turns of the coil is 500 turns, the current is 2.5A, and the larger than calculated value I is (2x2/0.01/0.0003) 0.5 2.3A (200 mm of the long side steel plate 2 is mostly picked out and does not participate in a magnetic loop), connecting magnetic circuits, forming a magnetic closed loop between the steel plates, and magnetically connecting the side steel plates;
5) laying a plastic film on the inner side of the steel plate;
6) pouring concrete, and leveling on the designated scales;
7) and (5) maintaining, then disconnecting the circuit, enabling the long side steel plate 2 and the combined side steel plate 1 to lose magnetic connection and tilt outwards, and automatically completing form removal.
Example 4
1) Connecting the magnetic core with a coil, packaging the magnetic core by using a packaging shell, connecting the coil with a direct current power supply 4 after passing through a reserved line hole 12 through a lead 5, and fixing the electromagnet 3 on an electromagnet reserved hole 11 of the combined side steel plate 1;
2) erecting and fixing the long side steel plates 2 at two sides, wherein the size of each long side steel plate 2 is 10mmx1200mmx2000 mm;
3) the size of the concrete bearing platform to be poured is 1000mmx1000mmx2000mm, the number of the combined side steel plates 1 is determined to be 2, the size is 10mmx500mmx2000mm, and erection is completed;
4) the dc power supply 4 is turned on, the number of turns of the coil is 500, the current is 1.5A, and the calculated value of I is greater than (1x1/0.01/0.0003) 0.5 1.15A (200 mm of the long side steel plate 2 is most taken out and does not participate in the magnetic circuit), the magnetic circuits are connected, a magnetic closed circuit is formed between the steel plates, and the side steel plates are connected by magnetic force;
5) laying a plastic film on the inner side of the steel plate;
6) pouring concrete, and leveling on the designated scales;
7) and (5) maintaining, then disconnecting the circuit, enabling the long side steel plate 2 and the combined side steel plate 1 to lose magnetic connection and tilt outwards, and automatically completing form removal.

Claims (7)

1. The utility model provides an adjustable cushion cap steel form of magnetic drive control, a serial communication port includes magnetic drive controlling means, combination side steel sheet (1) and rectangular side steel sheet (2), magnetic drive controlling means includes electro-magnet (3), combination side steel sheet (1) and rectangular side steel sheet (2) combination constitute the cushion cap steel form, electro-magnet (3) are installed on the cushion cap steel form, use electro-magnet (3) as the main control center, through control electro-magnet (3) electric current size, make combination side steel sheet (1) and rectangular side steel sheet (2) whole closed magnetic circuit that forms, and then control the engaging force between the steel form, make the template carry out effective connection.
2. The steel formwork of claim 1, wherein the magnetic drive control device further comprises a direct current power supply (4) and a lead (5), an electromagnet preformed hole (11) and a preformed line hole (12) are formed in the outer side of the combined side steel plate (1), the electromagnet preformed hole (11) is used for installing the electromagnet (3), the preformed line hole (12) is used for penetrating through the lead (5), and the direct current power supply (4) is connected with the electromagnet (3) through the lead (5).
3. The steel moulding plate for the magnetic force driven control adjustable bearing platform according to claim 2, wherein the magnetic core of the electromagnet (3) is silicon steel, and the outer part of the electromagnet (3) is provided with a packaging shell which is made of plastic.
4. The magnetic force drive control adjustable cushion cap steel form as claimed in claim 1, characterized in that the long side steel plate (2) is an integrated steel plate, the length of which is larger than the actual size of the cushion cap, so that the combined side steel plate (1) can be connected at any position in the middle of the integrated steel plate to achieve the purpose of the overall transverse extension of the form; the combined side steel plate (1) comprises a plurality of combined steel plates, and the purpose of longitudinal extension of the whole die is achieved through connection of different numbers of steel plates.
5. A magnetically actuated controlled adjustable platform steel form according to claim 4 characterised in that the elongate side steel plates (2) are provided with graduations.
6. A construction method of a magnetic force drive control adjustable cushion cap steel form as claimed in claim 4, characterized by comprising the following steps:
1) connecting a magnetic core with a coil, packaging the magnetic core by using a packaging shell, connecting the coil with a direct current power supply (4) after the coil passes through a reserved line hole (12) through a lead (5), and fixing an electromagnet (3) in an electromagnet reserved hole (11) of a combined side steel plate (1);
2) erecting and fixing the long side steel plates (2) at two sides;
3) according to the required size, determining the number of the combined side steel plates (1) and the connecting position of the combined side steel plates (1) and the long side steel plates (2), and completing erection;
4) turning on a direct current power supply (4) to connect the magnetic circuits, forming a magnetic closed loop between the steel plates, and magnetically connecting the steel plates on each side to complete the erection of the steel template of the bearing platform;
5) laying a plastic film on the inner side of the steel plate;
6) pouring concrete, and leveling according to the specified scales;
7) and (5) maintaining, then disconnecting the circuit, so that the long side steel plate (2) and the combined side steel plate (1) lose magnetic connection and tilt outwards, and automatically completing form removal.
7. The construction method according to claim 6, wherein when the current level satisfies I ≧ (bc/L/0.0003) 0.5 And in the/N, the bearing platform steel template cannot overturn, wherein I represents the current magnitude, the unit is A, b represents the length of the bearing platform steel template, the unit is m, c represents the width of the bearing platform steel template, the unit is m, L represents the thickness of the joint of the long side steel plate (2) and the combined side steel plate (1), the unit is m, and N represents the number of turns of the coil, and the unit is turns.
CN202210598448.2A 2022-05-30 2022-05-30 Magnetic drive control adjustable bearing platform steel formwork and construction method thereof Pending CN114960724A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001129815A (en) * 1999-11-04 2001-05-15 Ando Corp Magnet fixing form for molding prefabricated concrete rectangular parallelepiped
CN201915633U (en) * 2010-11-19 2011-08-03 青岛理工大学 Electromagnetic large template
CN204080844U (en) * 2014-09-16 2015-01-07 中建五局第三建设有限公司 Assembled steel mould for foundation bearing platform of house building engineering
CN112814375A (en) * 2021-01-15 2021-05-18 中国建筑第二工程局有限公司 Structure and method for quickly mounting and dismounting special-shaped beam template by utilizing electromagnetic force

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001129815A (en) * 1999-11-04 2001-05-15 Ando Corp Magnet fixing form for molding prefabricated concrete rectangular parallelepiped
CN201915633U (en) * 2010-11-19 2011-08-03 青岛理工大学 Electromagnetic large template
CN204080844U (en) * 2014-09-16 2015-01-07 中建五局第三建设有限公司 Assembled steel mould for foundation bearing platform of house building engineering
CN112814375A (en) * 2021-01-15 2021-05-18 中国建筑第二工程局有限公司 Structure and method for quickly mounting and dismounting special-shaped beam template by utilizing electromagnetic force

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