JP2007006583A - Equipotential bonding construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an equipotential bonding (single-point concentrated ground) construction method which electrically connects a metallic tank/metallic piping and foundational reinforcement which are used in a plant or a combustible combinat, all steel frames and reinforcement which constitute a steel frame building/a structure made of reinforced concrete within the premise of a radio base station, a highway, dam, airport runway, high level railway, warehouse, port facility, etc., and all steel frames and reinforcement (including metal pipings) which build a steel frame construction building/a building made of reinforced concrete adjacent to the structure, with each other. <P>SOLUTION: A steel frame 2 buried in reinforced concrete 1 and a metallic separator 4 for formwork fixation are connected electrically with each other via a conductive metallic body 5, and this steel frame 2 is connected electrically to the foundational steel frame 5 of a foundation pile 7 buried in the ground, and noise current due to thunder, static electricity, and electromagnetic waves are made to flow from this foundation pile 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes, for example, a plant surrounded by a fence, a metal tank used in a combustible complex, a metal pipe and a basic rebar, a radio base, a highway, a dam, an airport runway, a railway elevated road Steel structure buildings and foundations such as warehouses, harbor facilities, etc., or structures and foundations made of reinforced concrete, and general houses and buildings and temporary and earthquake-resistant buildings including temporary offices for construction built in the nearby site It relates to a method for equipotential bonding (single point concentrated grounding) of basic reinforcing bars.

  Currently, metal tanks and pipes and basic rebars used in plants and combustible complexes, as well as reinforced concrete structures such as radio bases, expressways, dams, airport runways, railway elevated roads, warehouses, and port facilities. When building a reinforced concrete building in an adjacent site, a metal outer fence is fixed on a foundation frame made of concrete that has been reinforced with reinforcement, and the power receiving facility is installed on the foundation frame,・ Communication routes are generally secured using telephone poles or pipes buried in the ground.

  For example, in combustibles and industrial plants that handle combustible materials, combustible material tanks, basic rebars, equipment buildings, management buildings, and residential buildings are often placed next to each other, especially public facilities (administrative buildings, disaster prevention radio, Factories, control towers and runways, dams, descending roads, highways, hospitals, etc.) are usually placed next to the same building, where the equipment building and management building are not separated by several meters. ing.

  For buildings made of reinforced concrete, for each building, foundation piles with reinforcing bars solidified with concrete are buried in the ground, the ground is solidified with concrete, and a foundation frame is built on the foundation piles with reinforcing bars. A construction method in which the ceiling floor is solidified with reinforcing bars and concrete is generally used. In high-rise buildings, a method is used in which a steel frame is assembled on a foundation that has undergone foundation work, and a wall board that has been previously solidified with reinforcing bars and concrete is welded or bolted between column bars. In addition, the seismic isolation building is provided with a laminated rubber and a vertical swing damper or a rollable metal sphere between the foundation frame and the building.

  In Japan, it is obliged to attach a lightning rod to the top of a tower or high-rise building, connect this lightning rod to a ground plate via a conductor, and let lightning current generated by lightning strike to the ground. A lightning rod is attached to the building. In addition to the above-mentioned technology, in 2003 AD, all the reinforcing bars and steel frames of the building were connected and the foundation was established as a European IEC standard in order to provide electrical continuity to the reinforcing bars and steel frames used in building construction. It is stipulated that it should be connected to the reinforcing bars of the pile (equipotential bonding), and it has been increasingly recognized as a common construction method worldwide as a new technology for measures against direct lightning strikes on buildings.

  For lightning, a lightning rod or lightning arrester has been used. For example, a vertical lightning conductor is fixed to the wall of a high-rise building, and this vertical lightning conductor is electrically connected to the building's reinforcing bar or steel frame via anchor bolts. A technique for releasing the gas from the water has also been proposed (see Patent Document 1).

Japanese Patent No. 3251828 (page 2 to page 3, FIG. 5)

  In general, a reinforced concrete structure is constructed by assembling reinforcing bars as a foundation base on the upper part of a foundation pile, surrounding the assembled reinforcing bars with a formwork, and placing concrete in the formwork. At that time, the mold plates are fastened using separators (metal support bolts) so that the mold does not come off due to the weight of the concrete.

  However, in the above-mentioned formwork method, the formwork plate is built after assembling the reinforcing bars, the gap is penetrated so that the separator does not come into contact with the reinforcing bars, and the concrete is placed after tightening this. Cannot be connected to the separator. For this reason, bolts and bolts for fixing signboards, coolers, water tanks, elevator machine rooms, parking facilities, etc. installed on the outer walls and rooftops of buildings that are not electrically connected to the foundation rebar Naturally, the nut becomes an independent metal body that is not grounded, and there is a risk of causing a fire due to discharge ignition or destruction of the impacted concrete.

  Normally, the floor concrete on each floor of the building is provided with inserts (non-conductive resin bolts and nuts) that support hanging bolts for hanging down the ceiling of the downstairs. -There is a problem similar to the above in that electrical appliance hanging brackets, sprinkler piping for fire-fighting equipment, electric wire / communication line piping, racks, etc. are not electrically connected to the reinforcing bars of the building.

  In addition, in a building to which earthquake-proofing and seismic isolation means have been applied, the foundation frame and the building are separated by laminated rubber due to the structure thereof, so that the metal of the entire building is not electrically connected. Even if you try to connect the conductor and ground wire from the pillar of the building and try to pass lightning current, the current of millions of volts caused by lightning will not flow through the conductor with high resistance, but will discharge to the basic rebar. For this reason, the laminated rubber is dissolved, causing a building collapse and a fire.

  Therefore, in such a construction method in which the reinforcing bars, separators and inserts are insulated from the ground, for example, when a lightning strike occurs in one building on the site, a discharge is also generated in the reinforcing bars in the adjacent building, In addition to destroying the board in the electrical equipment using the communication cable, there is a risk of fire and collapse of the building.

  In other words, in the method of electrically connecting reinforcing bars and steel frames as a method of preventing lightning strikes, lightning strikes occur at one building in multiple buildings on the same site, regardless of whether the building is completed or not. It is conceivable to discharge to anchor bolts such as signboards attached to the outside and the outer wall of the building, and this causes the following phenomenon.

  The concrete in the upper layer of the building peels off and falls, or discharge is ignited from the metal used in the building floor. Excess current flows through pipes including ground cables and metal rods that hang ceilings, anchor bolts are destroyed, antennas for radio wave reception / transmitters are used, and all IC boards used for the entire building on the site are used The electrical appliances are destroyed by electromagnetically induced electromagnetic waves. Also, if a lightning strike occurs during construction work, it may ignite from the reinforcing bars in the concrete and ignite the formwork. Furthermore, the conventional method cannot confirm that a current during a lightning strike has passed through a foundation pile or foundation base rebar buried in the ground, and cannot see whether the foundation pile has been destroyed.

  For this reason, the present invention is a steel tank and piping used in a plant, a combustible complex, a radio base, a highway, a dam, an airport runway, a railway elevated road, a warehouse, a port facility, etc., or a reinforced concrete product. This is an equipotential bonding method that electrically connects all the steel frames and reinforcing bars that make up the steel structure and all the steel frames and reinforcing bars that make up the steel structure building adjacent to the structure or the building made of reinforced concrete. In addition, the reinforcing bar embedded in the reinforced concrete is electrically connected to the metal separator for fixing the formwork through a conductive metal body, and the reinforcing bar is electrically connected to the foundation reinforcing bar of the foundation pile embedded in the ground. The first feature is that a noise current caused by lightning, static electricity, and electromagnetic waves flows from the foundation pile to the ground. In addition, the building's foundation rebar and steel column are electrically connected via a conductive metal body, cubicles, distribution boards, rooftop signs, water tank stands, wall signs, building floors, ceiling piping, electric wire racks, The second feature is to electrically connect the ceiling hanging bracket and the device arranged in the building floor to the foundation rebar through the conductive metal angle and the conductive metal body. Furthermore, tourmaline rocks or natural reki rocks (containing 90% or more of silicon dioxide) are used as aggregates for reinforced concrete, and applied to floor partitions or ceiling boards and metal boxes using paint mixed with the rock powder. The third feature is that electromagnetic waves are absorbed in the concrete wall and negative ions are generated in the building or the building floor. Furthermore, current sensors are attached to foundation piles, reinforcing bars, steel frames, and ground cables to monitor whether direct lightning noise current, electrostatic noise current, electromagnetic wave noise current, and leakage current flow, and in the internal cavity of the foundation pile. A TV camera is installed, the situation inside the foundation pile and the noise situation are monitored at the monitoring center in the building, the monitoring data is monitored in real time using a communication line, and it is monitored in remote areas in real time. The fourth feature is to repair equipment and signal equipment and cracks and cracks generated in building structures and foundation piles.

  According to the construction method of the present invention, all the reinforced concrete buildings and steel buildings including the foundation piles and foundations in the site are connected, and the connected foundation piles, foundation base bars, column bars, beam bars, steel columns The sensor is attached to the beam for monitoring, and the excess current is also monitored for all the ground cables for electric wires, communication and signal lines, and the center pile embedded in the ground is in the space above, below and below the foundation pile. It can be improved by attaching a lighted camera or hanging it so that the lighted camera can move in the foundation pile.

  Also, as a ground terminal for each floor, connect the ground plate with a metal insert embedded in the ceiling and a bolt and nut, or use this terminal and bolt and nut to connect to a seismic angle, so that each floor Earthquake countermeasures for metal equipment installed in the building, ground piles and foundation base bars used in the site, and reinforcing bars and steel frames used in the building, all metals become equipotential bonding, By making the cable the minimum cable length, it will prevent reception and transmission of radio waves and lead to cost reduction of the cable.

  Furthermore, according to the present invention, the cubicles, centralized monitoring panels, distribution boards, information boxes, server racks, surveillance cameras, TVs, office automation equipment used in buildings, substrates in precision equipment, power supplies / communications / Not only noise current such as direct lightning, lightning surge current, radio waves, electromagnetic waves, static electricity, etc. that penetrates electronic devices connected to TV / wireless device / surveillance camera cables etc. from the outside, but also wireless that occurs indoors It can also protect against noise currents such as radio waves, electromagnetic waves and static electricity.

Next, embodiments of the present invention will be described based on examples shown in the drawings.
FIG. 1 is a perspective view schematically showing a method of electrically connecting a reinforcing bar embedded in reinforced concrete and a metal separator for fixing a formwork via a conductive metal body, and FIG. 2 schematically showing the separator. FIG. 3 is an explanatory view schematically showing a building according to the present invention, FIG. 4 is a perspective view of a main part schematically showing the inside of the floor ceiling according to the present invention, and FIG. 5 is a building floor according to the present invention. FIG. 6 is an explanatory view schematically showing a building according to the present invention, FIG. 7 is an explanatory view schematically showing a multistory parking lot according to the present invention, and FIG. 8 is a foundation pile according to the present invention. FIG. 9 is a perspective view schematically showing an earthquake-proof / base-isolation foundation of a building according to the present invention, FIG. 10 is an explanatory diagram schematically showing highway parking according to the present invention, and FIG. These are explanatory drawings which show typically the airport which concerns on this invention.

  The present invention is a structure made of steel buildings and reinforced concrete in a site such as a plant, a metal tank and piping used in a combustible complex, a radio base, an expressway, a dam, an airport runway, a railway elevated road, a warehouse, a basic port facility, etc. Equipotential bonding that electrically connects all the steel frames and reinforcing bars that make up the object and all the steel frames and reinforcing bars (including metal pipes) that make up the steel structure building and reinforced concrete building adjacent to the structure It is a construction method. Specifically, the steel bar embedded in the reinforced concrete including the foundation frame and the metal separator for formwork are electrically connected through the conductive metal body, and the foundation embedded in the ground. It is electrically connected to the foundation rebar of the pile and is configured to flow noise currents from lightning, static electricity, and electromagnetic waves from the foundation base or foundation pile to the ground.

  FIGS. 1 and 2 show that a vertical reinforcing bar 2 and a beam reinforcing bar 3 embedded in a reinforced concrete 1 and a metal separator (metal supporting bolt) 4 for fixing a formwork are electrically connected through a conductive metal body 5. Shows how to connect. That is, in general, a reinforced concrete structure is constructed by assembling the vertical rebar 2 and the beam rebar 3 as the foundation base on the upper part of the foundation pile, surrounding the assembled vertical rebar 2 and the beam rebar 3 with a formwork, and placing concrete in this formwork. Constructed by casting. At that time, the formwork plates 1a are fastened together with the separator 4 so that the formwork does not come off due to the weight of the concrete. The separator 4 is fastened and electrically connected.

  As shown in FIGS. 3 to 7, the lightning rod 11 (antenna 12) provided on the rooftop is electrically connected to the foundation rebar 35 and the steel column 47 of the reinforced concrete building constructed as described above. , Rooftop and wall signs 9, water tank 10 and its mount 10a, cooler 7 and cubicle (substation equipment) 8, smoke exhaust duct 13 and metal pipe 25 provided in the ceiling, electric wire rack 46 and suspension bolt 18, building Various equipment such as desks, centralized monitoring panels, distribution boards, information boxes and server racks, TVs, OA equipment, etc., placed on the floor, insert bolts 29 and conductive metal angles (seismic brackets) 36 And a ground bar (conductive metal body) 37 to be electrically connected to the foundation rebar 35. Moreover, normally, the floor concrete on each floor of the building is provided with ceiling plate suspension bolts 44 for hanging the ceiling plate 43 below the floor, but the support bar for the fire alarm 15, the floor signboard 16, and the surveillance camera 28. 28a, lighting fixture (negative ion generating illumination) 26, patrol light 20a, support bar 27a of speaker 27, pipe 17a of sprinkler 17 of fire fighting equipment, pipe of electric wire / communication line 45, suspension rack 46, etc. It is electrically connected to the building's rebar.

  Further, a free access floor 21 is provided on the floor via a floor support bundle 22, and an antistatic mat 19 is laid on the floor 21. A ground cable 24 is connected to the floor support bundle 22 to be connected to a reinforcing bar in a reinforced concrete wall, and a current sensor 6 is attached so that the noise counter 20 can monitor whether an electrostatic noise current flows. ing. The free access column 39, the grounded outlet box 40, and the like are also connected to the ceiling board suspension bolt 44. In FIG. 3, 30 is an elevator, 31 is a rail thereof, and a rail support fitting 32 is electrically connected to the reinforced concrete 1 via an insert bolt 29. The messenger wire 34 for the outdoor cable is also electrically connected to the reinforced concrete 1 through the cable support angle 33. For example, as shown in FIG. 4, in the floor ceiling, a floor rebar binding metal fitting 41 that is clamped and fixed in a state where the floor rebar 23 is crossed is connected to the suspension bolt 18, and the suspension bolt 18 is connected to the suspension bolt connection metal 18a. Connect with it.

  As shown in FIG. 5 to FIG. 7, the structural foundation steel frame or foundation pile 35 in the underground portion of the building is usually a spiral line connected to the foundation, and a bottom plate (ground plate) made of a copper plate or an iron plate is formed in the bottom layer and the intermediate layer. ) 36 is welded so that an excess current can be quickly passed through the ground layers having low earth resistance values. Further, as the aggregate of the reinforced concrete 1, tourmaline rock or natural rock (containing 90% or more of silicon dioxide) 42 is used, and the floor partition 67, the ceiling board 43, and various devices are made using a paint mixed with the rock powder. Is applied to a metal box in which is stored, thereby absorbing electromagnetic waves and generating negative ions in the building or building floor. In addition, the current sensor 6 is attached to the foundation pile 35, the reinforcing bar 3, the steel frame 47, the ground cable 24, and the hanging metal fitting 18, and whether or not the direct lightning noise current, electrostatic noise current, electromagnetic wave noise current has flowed or the electric leakage has been detected. As shown in FIG. 8, a television camera (illuminated CCD camera) 53 is attached to the internal cavity of the foundation pile 35 via an optical cable 54 to monitor the situation inside the foundation pile, as shown in FIG. By monitoring at, cracks and cracks generated in the foundation pile 35 can be repaired appropriately. In addition, an unmanned building or facility without an administrator can monitor the above system remotely using a telephone line or the like.

  Normally, in a building made of reinforced concrete, a foundation pile 35 in which reinforcing bars are hardened with concrete is buried in the ground for each building, the ground is hardened with concrete, and a foundation frame 1b is made on the foundation pile 35 with reinforcing bars. In general, a method of fixing columns, beams and ceiling floors with reinforcing bars and concrete is generally used. This foundation frame 1b is equipotentially bonded to the outdoor lighting tower 52 and the like with a foundation rebar. In addition, for example, this construction method can be applied to poles and foundations of power poles, transmission towers and foundations, and the like. Moreover, in a high-rise building, a construction method is used in which a steel frame is assembled on a base 1b that has been subjected to foundation work, and a wall board that has been previously solidified with reinforcing bars and concrete is welded or bolted between column bars. Moreover, as shown in FIG. 9, in the seismic isolation building, a laminated rubber 50 and a damper 49 for preventing pitching or a rollable metal ball 51 are installed between the foundation frame 1b and the building. The bolts and nuts for fixing them are connected to the bolts and nuts of the foundation frame 1b by a metal plate or a mesh copper wire so that a noise current can be quickly passed to the ground.

  FIG. 10 shows highway parking according to the present invention. The management building 56 of the reinforced concrete structure adjacent to the gas station 57 and the toll booth 58 is subjected to earthquake resistance and seismic isolation measures. The fuel tank 71 and the piping are equipotentially bonded, and the current sensor 6 is disposed at a key point. In addition, a noise concentration monitoring center 59 is provided in the management building 56. The electrostatic sensor monitoring device 60, the communication / net cable monitoring device 61, the distribution board / power supply sensor monitoring device 62, and the building steel frame sensor monitoring device. 63 is installed. The noise current flowing in the distribution board 64, the antistatic floor mat 65, the free access 66, and the partition 67 installed on each floor can be monitored.

  FIG. 11 shows an airport according to the present invention. Lightning rods 11 are installed around the airport site, and all the steel frames and reinforcing bars that make up the runway 68 of the airplane 69, as well as the adjacent management building (steel structure building and reinforced concrete building) 56 and government tower 70 are installed. All steel frames and reinforcing bars (including metal pipes) to be constructed are electrically connected. That is, all steel frames and reinforcing bars that construct steel frame buildings and reinforced concrete structures in the airport premises, and metal fuel tanks 71 adjacent to these structures, all steel frames that construct steel structure buildings and reinforced concrete buildings And rebar (including metal pipes) are electrically connected and equipotentially bonded, and the rebar embedded in the reinforced concrete including the foundation frame 1a is electrically connected to the foundation rebar of the foundation pile 35 embedded in the ground In addition, a noise current caused by lightning, static electricity, and electromagnetic waves can flow from the foundation pile 35 to the ground.

It is a perspective view which shows typically the method of electrically connecting the reinforcement embed | buried in a reinforced concrete and the metal separator for a formwork via a conductive metal body. It is a perspective view which shows a separator typically. It is explanatory drawing which shows the building concerning this invention typically. It is a principal part perspective view which shows the inside of the floor ceiling which concerns on this invention typically. It is explanatory drawing which shows the building floor which concerns on this invention typically. It is explanatory drawing which shows the building concerning this invention typically. It is explanatory drawing which shows typically the multistory parking lot which concerns on this invention. It is explanatory drawing which shows the foundation pile which concerns on this invention typically. It is a perspective view which shows typically the earthquake-proof and seismic isolation base of the building concerning this invention. It is explanatory drawing which shows typically the highway parking which concerns on this invention. It is explanatory drawing which shows typically the airport which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforced concrete 1a Formwork board 1b Foundation stand 2 Vertical reinforcement 3 Beam reinforcement 4 Separator 5 Conductive metal plate (conductive metal body)
6 Current sensor 7 Cooler 8 Cubicle (Substation equipment)
9 Signboard 10 Water tank 10a Water tank stand (Angle)
11 Lightning rod 12 Antenna 13 Smoke duct 14 Smoke duct hanging bracket 15 Fire alarm 16 Electronic bulletin board 17 Sprinkler 17a Sprinkler piping 18 Suspension bolt 18a Suspension bolt coupling bracket 19 Antistatic mat 20 Noise counter 20a Alarm (patlight)
21 Free access 22 Floor support bundle 23 Floor rebar 24 Ground cable 25 Metal piping 26 Negative ion generation illuminator 27 Speaker 27a Speaker support bar 28 Monitoring camera 28a Monitoring camera support bar 29 Insert 30 Elevator 31 Rail 32 Rail support bracket 33 Cable support angle 34 Messenger wire for outdoor cable 35 Foundation steel frame or foundation pile (spiral muscle)
36 Bottom plate 37 Ground bar 38 Seismic bracket 39 Free access support 40 Grounded outlet box 41 Floor rebar binding bracket 42 Concrete aggregate (tourmaline ore or repellent rock)
43 Ceiling plate 44 Ceiling plate support bolt 45 Electric wire 46 Electric wire suspension rack 47 Steel column 48 Noise monitoring panel 49 Anti-seismic and seismic isolation damper 50 Seismic and seismic isolation laminated rubber 51 Seismic and seismic isolation ball 52 Outdoor lighting tower 53 TV camera (Lighting CCD camera)
54 Optical cable 55 Television (general television or monitor television for monitoring)
56 Management Building (Seismic / Seismic Isolation Building)
57 Gas station 58 Toll booth 59 Noise concentration monitoring center 60 Monitoring device for static electricity sensor 61 Monitoring device for communication / net cable 62 Monitoring device for distribution panel / power supply sensor 63 Monitoring device for building steel sensor 64 Distribution board 65 Static electricity countermeasure floor Mat 66 Free access 67 Partition 68 Runway 69 Airplane 70 Government tower 71 Metal fuel tank

Claims (4)

  Metal tanks and pipes and basic rebars used in plants, combustibles complexes, radio bases, expressways, dams, airport runways, railway elevated roads, warehouses, harbor facilities, etc. An equipotential that electrically connects all the steel frames and reinforcing bars that make up the structure and all the steel frames and reinforcing bars (including metal pipes) that make up the steel structure building and reinforced concrete building adjacent to the structure. This is a bonding method, in which the reinforcing bars embedded in the reinforced concrete including the foundation frame are electrically connected to the metal separator for fixing the formwork via a conductive metal body, and the reinforcing bars are embedded in the ground. An equipotential bonder characterized in that it is electrically connected to the foundation rebar of the foundation pile, and noise current caused by lightning, static electricity, and electromagnetic waves flows from the foundation base or foundation pile to the ground. Packaging method.   The building's foundation rebar and steel column are electrically connected via a conductive metal body, as well as cubicles, distribution boards, rooftop signs, aquarium stands, wall signs, building floors, ceiling piping, electric wire racks, and ceiling suspensions. 2. The equipotential bonding method according to claim 1, wherein the metal fitting and the device arranged in the building floor are electrically connected to the foundation rebar through the conductive metal angle and the conductive metal body.   As aggregate of reinforced concrete, tourmaline rock or natural reki rock (containing 90% or more of silicon dioxide) is used, and in the concrete wall and floor partition, ceiling board, metal box using paint mixed with rock powder. The equipotential bonding method according to claim 1 or 2, wherein by applying, the electromagnetic wave is absorbed and negative ions are generated in a building or a floor.   A current sensor is attached to the foundation pile, rebar, steel frame and ground cable to monitor whether direct lightning noise current, electrostatic noise current, electromagnetic noise current has flowed or leaked, and in the internal cavity of the foundation pile, Install the camera, monitor the situation inside the foundation pile and the noise status at the monitoring center in the building, monitor the monitoring data in the remote area in real time, and influence the electrical / communication equipment / The equipotential bonding method according to any one of claims 1 to 3, wherein repair work is performed on signal equipment and cracks or cracks generated in the building structure and foundation pile.

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