US20140339486A1 - Security barrier - Google Patents
Security barrier Download PDFInfo
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- US20140339486A1 US20140339486A1 US14/237,125 US201214237125A US2014339486A1 US 20140339486 A1 US20140339486 A1 US 20140339486A1 US 201214237125 A US201214237125 A US 201214237125A US 2014339486 A1 US2014339486 A1 US 2014339486A1
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- United States
- Prior art keywords
- fence
- barrier
- post
- fences
- posts
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0476—Foundations
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0461—Supports, e.g. posts
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
- E01F13/12—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions for forcibly arresting or disabling vehicles, e.g. spiked mats
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/06—Continuous barriers extending along roads or between traffic lanes essentially made of cables, nettings or the like
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2253—Mounting poles or posts to the holder
- E04H12/2269—Mounting poles or posts to the holder in a socket
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/009—Footing elements for fence posts or fence sections
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/1413—Post-and-rail fences, e.g. without vertical cross-members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
- E04H17/161—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames using wire panels
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
- E04H17/22—Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like
Definitions
- This invention relates to security barriers and, in particular but not exclusively, to barriers that provide an effective perimeter protection against wilful intrusion into high security installations such as airports.
- a known anti-vehicle barrier is described in the Applicant's co-pending patent application number GB2447783.
- This document discloses a perimeter security barrier for restraining a vehicle impacting the barrier from a direction substantially perpendicular thereto or between 25 and 90 degrees relative to the barrier.
- the barrier comprises a plurality of wire ropes supported by a series of posts configured to restrain heavy impacting vehicles.
- the present invention has been devised with the problem of how to effectively protect against breaches by both persons and vehicles.
- a security barrier comprising a first fence and a second fence, the first fence comprising a first series of posts and the second fence comprising a second series of posts, the first and second fences being provided adjacent to each other with the first fence being coupled below ground level with the second fence, wherein the barrier further comprises a footing having a first post socket for receiving a first post from the first fence and a second post socket for receiving a first post from the second fence.
- the coupling between the first and second fences is provided between the first post socket and the second post socket.
- the footing is formed of concrete.
- the first and second post sockets may be of different dimensions.
- the sockets may be of the same dimensions.
- One or both post sockets may comprise separate inserts—e.g. a liner, preferably of metal—provided within correspondingly sized apertures within the footing. This enables easy replacement of the sockets and/or posts in the event of damage due to an impact. Alternatively, the posts may be fixed directly within the footing etc.
- the common footing provided for posts of the first and second fences provides a secure foundation and adds strength to the barrier, which may be subjected to a high energy impact from an oncoming vehicle.
- the common footing also helps to dissipate energy from the impact through the posts to the footing and ground thus assists in arresting the vehicle.
- the barrier further comprises connecting means for connecting the first post of the first fence to the first post of the second fence below ground level.
- the connecting means may comprise one or more bolts connecting the first and second posts and/or sockets. This further strengthens the foundation and aids energy dissipation in the event of an impact by a vehicle.
- first and second sockets are separated by a spacing means.
- the posts are separated by a distance of between 2 and 20 cm.
- the separation is less than 10 cm.
- the first and second sockets are separated by a distance of 5.0 or 5.5 cm.
- the two fences are preferably provided as close together as possible, just leaving space therebetween to allow maintenance access—e.g. for rope tensioning or replacement/re-hanging of ropes following an impact.
- Mounting the two fences close together advantageously reduces the footprint required on the land. It furthermore facilitates maintenance of the surrounding land and/or environment as maximum access is provided to the land near the barrier without the need to interfere with the barrier itself (which may be dangerous due to the threat of attack of the installation). Furthermore, if the two fences were separated further with a ‘no-man's land’ therebetween, it would be visually more obtrusive.
- the barrier comprises a plurality of footings, each for coupling a first fence with a second fence such that the first and second fences extend substantially in the same direction as one another.
- the first fence may be an anti-personnel fence configured to prevent access from pedestrian intruders and the second fence may be a vehicle mitigating fence configured to withstand and absorb energy from an impact by a vehicle.
- the anti-personnel fence is disposed with respect to the vehicle mitigating fence such that the anti-personnel fence will be impacted first by an oncoming vehicle.
- the vehicle mitigating fence is thus provided on the opposite side of the barrier (i.e. the side immediately adjacent the area to be protected).
- This arrangement helps to minimise the damage to the barrier as collapse of the anti-personnel fence into the vehicle mitigating fence has less of an effect on the vehicle mitigating fence than if the vehicle mitigating fence was disposed on the impact side of the barrier with the antipersonnel fence being provided on the installation side thereof.
- Mounting the two fences close together advantageously controls damage to the antipersonnel fence since, in the event of a vehicle impact, the vehicle engages with the anti-personnel fence first and then with the vehicle mitigating fence shortly thereafter.
- the closeness of the fences and the effectiveness of the vehicle mitigating fence in arresting the vehicle means that minimal damage to the anti-personnel fence occurs. If the anti-personnel fence were provided at a greater distance from the vehicle mitigating fence, it would be more susceptible to damage over a greater length since it is inherently not as strong or resistant to damage as the vehicle mitigating fence.
- the vehicle mitigating fence is disposed on the impact side of the barrier with the antipersonnel fence being provided on the installation side thereof.
- the vehicle mitigating fence comprises a plurality of wire ropes supported by the second series of posts, and the anti-personnel fence comprises a series of meshed panels supported on the first series of posts. This advantageously allows a clear line of sight through the fence, enabling visual security checks to be performed.
- the vehicle mitigating fence may comprise one or more ropes woven with respect to the posts and/or one or more unwoven ropes disposed on one side of the series of posts.
- One or each end of the plurality of ropes of the vehicle mitigating fence may terminate in a terminal, preferably a terminal provided on or in the ground.
- the last post in the series of posts of the vehicle mitigating fence may comprise means on or within the post for supporting the ropes. It is preferable for the ropes to enter the terminal from the end post at an angle that enables the separation of the vehicle mitigating fence and the anti-personnel fence to remain substantially constant. That is to say, even though a terminal for receiving the ends of the ropes of the vehicle mitigating fence is provided, this does not alter the line of the anti-vehicle or anti-personnel fence and no interruption or deviation thereof is required.
- the damage to the anti-personnel fence is localised such as to only affect a single or a small number of panels. Panels away from the vicinity of the impact remain intact or at least in a condition to withstand further impacts.
- the vehicle mitigating fence also remains in place with only a small number of posts in the area local to the impact itself being bent/deformed. The combined fence thus remains operable allowing time for repairs to be made thereto whilst still providing a good degree of security.
- a post footing for use with a security barrier is provided, as described above.
- FIG. 1 shows a perspective view of a security barrier according to an embodiment of the invention
- FIGS. 2 a to 2 c show front elevational views of sections of the security barrier according to an embodiment of the invention
- FIGS. 3 a and 3 b are end views of the security barrier of FIGS. 2 a to 2 c;
- FIG. 4 a is a top plan view of an end post and terminal according to an embodiment of the invention.
- FIG. 4 b is a top plan view of an end post and terminal according to another embodiment of the invention.
- FIG. 4 c is a top plan view of an end post and terminal according to a further embodiment of the invention.
- FIG. 5 a is a front perspective view of the end post of the embodiment of FIG. 4 a;
- FIG. 5 b is a rear perspective view of an end post
- FIGS. 6 to 8 show the security barrier of FIG. 1 before and after an impact by a vehicle.
- FIG. 1 shows a security barrier 10 .
- the barrier 10 comprises a vehicle mitigating fence 20 for protecting an installation (not shown) against otherwise penetrative vehicular attacks.
- the barrier 10 further comprises an anti-personnel fence 40 designed to keep pedestrian intruders out of the installation.
- the anti-vehicle fence 20 e.g. Bristorm® manufactured by Hill & Smith Limited, is intended to restrain heavy vehicles impacting from a direction that is substantially perpendicular, or at an angle of between 25 and 90 degrees, to the line of the barrier. Breach of the barrier by a heavy goods vehicle in the order of 7500 kg inertial mass impacting the barrier at speeds of about 64-80 km/hr is prevented.
- the vehicle mitigating fence 20 comprises a series of posts 22 mounted in the ground.
- a plurality of ropes 24 are supported on the posts 22 .
- the ropes 24 may be plastic coated, high tensile steel ropes or cables that are pre-tensioned between the posts 22 .
- the ropes 24 may be disposed at a height of between 300 mm and 2 metres above the ground.
- the height position of at least some of the ropes 24 is selected to be such that the engine of an impacting vehicle will impact them.
- Ropes 24 may be provided at varying heights above the ground, for absorbing energy from a range of vehicles of varying sizes.
- a pair of wire ropes 24 a , 24 b is provided at or approximately at the midpoint of the posts 22 (i.e. approximately halfway from the ground level to the top of the posts 22 ).
- the ropes 24 a , 24 b are sinuously woven with respect to the posts such that a first rope 24 a of the pair passes on a first side of a first post 22 , and on an opposite, second side of an adjacent post 22 , and so on.
- the second rope 24 b of the pair passes on a corresponding second side of the first post 22 , and on a first side of the adjacent post, etc.
- An additional rope 24 c is sinuously woven between the posts 22 at a vertical position lower than the rope pair 24 a , 24 b
- a further rope 24 d is sinuously woven between the posts 22 at a vertical position higher than the rope pair 24 a , 24 b
- These additional ropes 24 c , 24 d are oppositely woven with respect to each other such that one passes on a first side of one post and the other passes on the opposite, second side thereof.
- a further rope 24 e is provided within a slot 26 in the top of the posts 22 .
- Other configurations are envisaged, e.g. a different combination of woven and unwoven ropes, or with further woven rope pairs or additional woven or unwoven ropes.
- the ropes 24 are supported on the posts 22 using one or more hooks 28 e.g. formed/angled from a stainless steel bar and fixed within corresponding apertures provided within the posts 22 e.g. with bolts.
- the design parameters of the barrier are such that, on impact, the intermediate posts are pushed back to incline away from the impact direction by up to 40 degrees.
- the angle of the hook 28 is such that the ropes 24 will tend to separate from the hook 28 when the posts 22 are pushed back during impact.
- the intermediate posts may be inclined relative to the vertical towards the predetermined direction, that is, towards the oncoming vehicle.
- the inclination of the intermediate post(s) to the vertical may be between 0 and 45 degrees, preferably between 0 and 20 degrees, and more preferably 10 degrees.
- the barrier 10 may be provided as a perimeter security barrier—i.e. extending around and enclosing an installation, or a length thereof may be provided to e.g. span the distance between two buildings, walls or other solid structures.
- the ropes 24 pass around, or are supported by an end post 30 .
- the end post 30 is vertical and anchored in the ground.
- a rope support device is provided on the end post 30 .
- the rope support device is a tab 31 welded or integrally formed with the post 30 .
- One or more apertures 31 a are provided within the tab 31 for receiving one or more ropes 24 .
- each of the five ropes 24 pass through and are thus supported by a separate tab aperture 31 a .
- the ropes may be supported by other means e.g. apertures or grooves/notches provided directly within the post 30 , or hooks or provided on the post 30 .
- the ropes 24 are anchored at each end thereof and terminate in a rope terminal 32 .
- the terminal 32 is provided on or in the ground.
- the ground terminal 32 may be in the form of bolts or another suitable mechanical rope gripping device.
- the terminal 32 also holds the ropes in tension.
- the ropes may be tensioned after hanging on the posts 22 , and the terminal 32 then acts to maintain the tension therein.
- a load or energy-absorbing device (not shown) may be provided between respective ends of the ropes 24 and the posts 30 /terminal 32 . This device may be in the form of a hot rolled channel section or hollow tube that is configured to absorb energy transmitted from the impacting vehicle by the ropes.
- the energy-absorption means is designed to deform under the increased tension load in the ropes during impact by a vehicle. This limits the peak rope loads to tolerable levels and restrains the ropes in order that they develop tension to resist penetration or breach of the barrier by the impacting vehicle.
- FIG. 4 a shows an example of termination of the vehicle mitigating fence 20 earlier than the anti-personnel fence 40 .
- FIG. 4 b shows an alternative embodiment wherein two runs of vehicle-mitigating fence 20 , 20 ′ are terminated using a common end post 30 .
- the ropes 24 of a first vehicle mitigating fence 20 pass around the end post 30 as described above and terminate in a terminal 32 .
- the ropes 24 ′ of a second vehicle mitigating fence 20 ′ pass around the end post 30 as described above and terminate in a second terminal 32 ′.
- the ropes 24 , 24 ′ pass through tab apertures 31 a as described above. Separate or common apertures 31 a may be provided for the ropes of each of the two fences 20 , 20 ′.
- the terminals 32 are inset from the line of the barrier 10 a little such that the ropes 24 of the vehicle mitigating fence 20 , 20 ′ enter the terminals 32 , 32 ′ at an angle slightly greater than 90° relative to the original direction of the fence 20 .
- This enables the vehicle mitigating fence 20 , 20 ′ and the anti-personnel fence 40 to be situated close together, at substantially the same separation along the length of the barrier 10 (apart from in the vicinity of where the ropes 24 pass around the end post 30 —as can be seen in FIGS. 4 a , 4 b ).
- FIGS. 4 a , 4 b In the embodiments of FIGS.
- this enables the barrier 10 to be provided with a 90° change of direction. If the terminals 32 , 32 ′ were provided at 90° to the original line of the vehicle mitigating fence 20 , this would necessitate a change in the line of the anti-personnel fence 20 e.g. by flaring it out around the terminals 32 . Similarly, in some known wire rope barriers used for other purposes, the ropes thereof terminate in the end post itself (i.e. a ground terminal is not used) which, if incorporated in embodiments of the present invention, would also require flaring out of an adjacent anti-personnel fence.
- terminals 32 , 32 ′ could be provided at different locations in order to provide a different change of angle (i.e. other than 90°) at which lengths of vehicle mitigating fence 20 , 20 ′ are provided.
- Posts similar to the end posts 30 shown in FIGS. 4 a and 5 a could also be utilised in directing the ropes 24 of a single fence 20 to continue at a different angle—90° or otherwise—e.g. as would be required if the barrier 10 is employed as a perimeter barrier.
- FIG. 4 c shows an alternative embodiment wherein termination of two runs of vehicle mitigating fence 20 , 20 ′ is required without any change of angle.
- the ropes 24 , 24 ′ pass through tab apertures 31 a on the post 30 and exit at an angle to terminate in respective terminals 32 , 32 ′ such that the vehicle mitigating fences 20 , 20 ′ are provided substantially in line with each other with no change of angle therebetween. This enables the vehicle mitigating fence 20 , 20 ′ to run substantially in a straight line parallel to the anti-personnel fence 40 .
- the fences 20 , 40 are thus arranged to extend substantially in the same direction as one another and, when a change in direction is required they remain close together and continue to extend in substantially the same direction after the change in angle.
- the fences 20 , 40 may run in a straight line, approximately parallel to one another, at least over a length thereof. Depending on the nature of the installation to be protected, the fences 20 , 40 may be required to change direction at certain locations along the length thereof.
- the ropes 24 can be anchored at any angle relative to the original direction of a length of fence 20 , or in line therewith, depending on the site topography and/or installation requirements.
- the fences 20 , 40 may also be terminated in different locations. This provides flexibility to protect a variety of areas of land/installations.
- the anti-personnel fence 40 e.g. SecureguardTM provided by Barkers Fencing, provides protection against wilful intrusion by people and is designed to mitigate against intruders climbing over and cutting through the fence.
- a series of posts 42 are mounted in the ground.
- a plurality of mesh panels 44 are secured to the posts 42 e.g. with tamper-proof bolts 45 (shown in FIG. 3 b ).
- the anti-personnel fence may be of the chain link or palisade type.
- the mesh size is small (e.g. 75 mm ⁇ 12.5 mm produced with 4.00 mm+/ ⁇ 0.10 mm wire).
- the posts 42 are taller than those 22 of the anti-vehicle fence 20 , e.g.
- the anti-personnel fence 40 extends vertically beyond the vehicle mitigating fence 20 .
- the anti-personnel fence 40 is required to be tall in order to keep intruders out of the installation.
- the anti-personnel fence can be provided with or without strainer posts 46 e.g. as shown in FIGS. 4 b , 4 c .
- strainer posts are used at corners and intermediate posts of the anti-personnel fence 40 where tensioned line wires are used to support the mesh (not shown).
- the strainer post has a “leg” bolted to the side of the post at an angle of about 45 degrees.
- the vehicle mitigating fence 20 and the anti-personnel fence 40 are mounted in the ground in close proximity to one another.
- the minimum spacing required therebetween is determined by the diameter of the rope 24 plus space to allow access for installing/rehanging ropes etc.
- a typical rope diameter used is 15.7 mm (excluding the plastic coating that is preferably provided on the rope).
- the gap between adjacent faces on the posts 22 , 42 may be within approximately 2-15 cm, and preferably substantially at a separation of 5.5 cm. Larger spacings e.g. 20 cm or more are envisaged, but this would compromise the benefit of the barrier 10 occupying only a small footprint on the land. This spacing allows for the fitting or removal of one of the ropes 24 without the need to dismantle the entire fence 20 . This is particularly important when repairing the barrier 10 following an impact.
- the vehicle mitigating fence 20 and the anti-personnel fence 40 are mounted in the ground in a common footing or foundation 50 .
- the footing 50 is provided entirely within the ground.
- a first channel 52 is sized to receive the lower end of post 22 of the anti-vehicle fence 20 .
- a second channel 54 is sized to receive the lower end of post 42 of the anti-intruder fence 40 .
- the channel 52 for the vehicle mitigating barrier post 22 is wider and shallower than the channel 54 for the anti-personnel barrier post 42 . It will, however, be appreciated that each channel 52 , 54 may be of any width, depth and height to accommodate different sized posts 22 , 42 .
- FIG. 3 b shows the footing 50 and details of how the ends of the posts 22 , 42 are provided therein.
- a socket 53 a is provided within the channel 52 , the end of the post 22 being received therein.
- a similar socket 53 b is provided within the channel 54 with the end of post 42 being received therein.
- Each socket 53 a , 53 b is a metal insert or sleeve corresponding in size externally to the internal dimensions of the channels 52 , 54 .
- the internal size of the socket 53 a , 53 b correspond to the external dimensions of the end of the posts 22 , 42 .
- the depth of the sockets 53 a , 53 b define the height of the posts 22 , 42 of the vehicle-mitigating fence 20 and the anti-personnel fence 40 above ground and can vary from post to post and for different installations.
- One or more spacer blocks 55 are provided within the footing 50 between the socket 53 a for the vehicle-mitigating fence post 22 and the socket 53 b for the anti-personnel fence post 42 .
- two spacer blocks 55 are provided, welded or otherwise secured to the anti-vehicle post socket 53 a .
- the spacer blocks 55 can be of any size chosen to define the desired spacing between the posts 22 , 42 —e.g. 5.5 cm in width as discussed above.
- the socket 53 b for the anti-personnel fence post 42 is provided with one or more apertures (corresponding to the number of spacer blocks 55 being used) through which a bolt 57 is provided.
- the bolt 57 couples the socket 53 b of the anti-personnel fence post 42 to the socket 53 a and thus to the vehicle-mitigating fence post 22 .
- the anti-personnel fence post 42 is provided with one or more apertures corresponding to the apertures in the socket 53 b .
- the bolt 57 can therefore pass through the apertures of the anti-personnel fence post 42 to couple the socket 53 b and the anti-personnel fence post 42 .
- the position of the apertures in the socket 53 b , anti-personnel posts 42 and thus the position of the spacer blocks 55 can be chosen relative to the socket 53 a for the post 22 of the vehicle-mitigating fence 20 to control the height of the anti-personnel fence 40 above the ground.
- the post 42 of the anti-personnel fence 40 could be provided in a sleeve (not shown) such that one or both posts 22 , 42 are mounted in a sleeve in the footing 50 .
- the spacer block 55 could be welded or bolted (for example) to either or both sleeves.
- a footplate 56 may be provided on the base of one or each of the posts 22 , 42 .
- the footplate 56 helps to secure the post 22 , 42 in the footing 50 , especially since the post 22 , 42 may be subject to a high-energy impact from a colliding vehicle.
- the two fences 20 , 40 are thus coupled together underground via the coupling between the sockets 53 a , 53 b but remain independent of each other above ground level.
- the footing 50 is a concrete footing such that the ends of the posts 22 , 42 are embedded within the concrete.
- the coupled sockets 53 a , 53 b and anti-personnel fence post 42 are positioned and suspended within a hole in the ground at the desired height within the hole (defined by the predetermined height of the sockets 53 a , 53 b ). Concrete is then poured into the hole in order to secure the sockets 53 a , 53 b and post 42 therein.
- the mesh panels 44 are then attached to the posts 42 of the anti-personnel fence, and the ropes 24 are mounted on the posts 22 of the vehicle-mitigating fence 20 , terminating at the end posts 30 and terminals 32 .
- a larger common footing 60 is provided in which an end post 30 and one or more adjacent fence posts 22 , 22 ′, 42 are mounted.
- the common footing 60 preferably concrete, can be of any size to accommodate the required number of posts 22 , 22 ′, 42 , 60 .
- the ground terminals 32 , 32 ′ can also be mounted on/within the footing 60 .
- FIG. 6 shows a security fence 10 according to embodiments of the invention just prior to a collision by an oncoming vehicle.
- the fence 10 is constructed so that an impacting vehicle will first make contact with the anti-personnel fence 40 , and then with the vehicle mitigating fence 20 .
- the majority of the ropes 24 of the vehicle mitigating fence 20 are provided at a height that corresponds to the front/bumper of the vehicle.
- An impacting vehicle makes contact with the ropes 24 which push back on the posts 22 . This transmits energy to the posts 22 adjacent to the impact zone, thereby spreading the impact load along the length of the fence 20 . Impact energy is also dissipated through the posts into the common footing 50 and into the ground.
- FIGS. 7 and 8 show the security barrier 10 after an impact has occurred. It can be seen that the posts 22 of the vehicle mitigating fence 20 in the vicinity of the impact have been bent or deformed, but are still standing with at least some of the ropes 24 being maintained in position with respect to the posts 22 . Away from the impact zone, the posts 22 remain upright with the ropes 24 substantially in their original positions. Although damaged, the anti-vehicle fence 20 is still capable of withstanding further impacts from vehicles along its length, and especially away from the point of impact.
- Embodiments of the invention employ separate anti-personnel and anti-vehicle fences, independent above ground, which advantageously provide great flexibility in that the design can be adapted to match an existing perimeter or to provide whatever level of perimeter protection is desired.
Abstract
A security barrier (10) comprises a first fence (20) and a second fence (40). The first fence comprises a first series of posts (22) and the second fence comprises a second series of posts (42). The first and second fences are provided adjacent to each other with the first fence being coupled below ground level with a the second fence. A footing having first and second post sockets is also provided for receiving a first post from each of the first and second fences respectively.
Description
- This invention relates to security barriers and, in particular but not exclusively, to barriers that provide an effective perimeter protection against wilful intrusion into high security installations such as airports.
- A known anti-vehicle barrier is described in the Applicant's co-pending patent application number GB2447783. This document discloses a perimeter security barrier for restraining a vehicle impacting the barrier from a direction substantially perpendicular thereto or between 25 and 90 degrees relative to the barrier. The barrier comprises a plurality of wire ropes supported by a series of posts configured to restrain heavy impacting vehicles.
- High security installations such as airports, defence installations etc are, however, not only prone to attacks by vehicles but also by pedestrians wishing to gain access thereto. The anti-vehicle fence discussed above would be ineffective against intrusion by persons who could simply climb over or through the wire ropes. Specialist anti-personnel fences, comprising panels of small mesh spacing, are known in the art that are resistant to cutting and climb-over.
- The present invention has been devised with the problem of how to effectively protect against breaches by both persons and vehicles.
- According to the present invention, there is provided a security barrier comprising a first fence and a second fence, the first fence comprising a first series of posts and the second fence comprising a second series of posts, the first and second fences being provided adjacent to each other with the first fence being coupled below ground level with the second fence, wherein the barrier further comprises a footing having a first post socket for receiving a first post from the first fence and a second post socket for receiving a first post from the second fence.
- It is an advantage that two separate fences are used for the purpose of preventing access by both vehicles and persons since this avoids providing a single dual-purpose barrier that is more complex to manufacture and expensive to repair in the event of a vehicle impact or other damage. However, coupling the fences together underground provides the further advantage of strengthening the foundations of the barrier and therefore the barrier itself. It is a further advantage in providing sockets for each fence post as, in the event of damage to one of the fences, such as by a vehicle impact, the sockets allow easier and quicker repair of the damaged fence post and therefore the barrier. Furthermore, by providing both sockets in the same footing, the strength of the barrier footing is increased relative to providing separate footings for each socket. Manufacture of the footing for the barrier is also easier with a single footing.
- In an embodiment, the coupling between the first and second fences is provided between the first post socket and the second post socket. By coupling the fences in this way, the energy from any impact with one of the fences is at least partially insulated from the second fence. This is advantageous as it minimises the area of the barrier damaged thus minimising the area of any breach in the fence that may require guarding.
- Preferably, the footing is formed of concrete. The first and second post sockets may be of different dimensions. Alternatively, the sockets may be of the same dimensions.
- One or both post sockets may comprise separate inserts—e.g. a liner, preferably of metal—provided within correspondingly sized apertures within the footing. This enables easy replacement of the sockets and/or posts in the event of damage due to an impact. Alternatively, the posts may be fixed directly within the footing etc.
- The common footing provided for posts of the first and second fences provides a secure foundation and adds strength to the barrier, which may be subjected to a high energy impact from an oncoming vehicle. The common footing also helps to dissipate energy from the impact through the posts to the footing and ground thus assists in arresting the vehicle.
- In an embodiment, the barrier further comprises connecting means for connecting the first post of the first fence to the first post of the second fence below ground level. The connecting means may comprise one or more bolts connecting the first and second posts and/or sockets. This further strengthens the foundation and aids energy dissipation in the event of an impact by a vehicle.
- In an embodiment the first and second sockets are separated by a spacing means. Preferably, the posts are separated by a distance of between 2 and 20 cm. Preferably the separation is less than 10 cm. Desirably, the first and second sockets are separated by a distance of 5.0 or 5.5 cm. The two fences are preferably provided as close together as possible, just leaving space therebetween to allow maintenance access—e.g. for rope tensioning or replacement/re-hanging of ropes following an impact.
- Mounting the two fences close together advantageously reduces the footprint required on the land. It furthermore facilitates maintenance of the surrounding land and/or environment as maximum access is provided to the land near the barrier without the need to interfere with the barrier itself (which may be dangerous due to the threat of attack of the installation). Furthermore, if the two fences were separated further with a ‘no-man's land’ therebetween, it would be visually more obtrusive.
- In a preferred embodiment the barrier comprises a plurality of footings, each for coupling a first fence with a second fence such that the first and second fences extend substantially in the same direction as one another.
- The first fence may be an anti-personnel fence configured to prevent access from pedestrian intruders and the second fence may be a vehicle mitigating fence configured to withstand and absorb energy from an impact by a vehicle. Preferably, the anti-personnel fence is disposed with respect to the vehicle mitigating fence such that the anti-personnel fence will be impacted first by an oncoming vehicle. The vehicle mitigating fence is thus provided on the opposite side of the barrier (i.e. the side immediately adjacent the area to be protected). This arrangement helps to minimise the damage to the barrier as collapse of the anti-personnel fence into the vehicle mitigating fence has less of an effect on the vehicle mitigating fence than if the vehicle mitigating fence was disposed on the impact side of the barrier with the antipersonnel fence being provided on the installation side thereof.
- Mounting the two fences close together advantageously controls damage to the antipersonnel fence since, in the event of a vehicle impact, the vehicle engages with the anti-personnel fence first and then with the vehicle mitigating fence shortly thereafter. The closeness of the fences and the effectiveness of the vehicle mitigating fence in arresting the vehicle means that minimal damage to the anti-personnel fence occurs. If the anti-personnel fence were provided at a greater distance from the vehicle mitigating fence, it would be more susceptible to damage over a greater length since it is inherently not as strong or resistant to damage as the vehicle mitigating fence. If the two fences were separated at a distance approximately equal to or less than the height of the anti-personnel fence, a vehicle impacting the anti-personnel fence could force it down onto the vehicle mitigating fence such that the former acts as a ramp for a vehicle to breach the latter.
- Alternatively, the vehicle mitigating fence is disposed on the impact side of the barrier with the antipersonnel fence being provided on the installation side thereof.
- In an embodiment, the vehicle mitigating fence comprises a plurality of wire ropes supported by the second series of posts, and the anti-personnel fence comprises a series of meshed panels supported on the first series of posts. This advantageously allows a clear line of sight through the fence, enabling visual security checks to be performed. The vehicle mitigating fence may comprise one or more ropes woven with respect to the posts and/or one or more unwoven ropes disposed on one side of the series of posts.
- One or each end of the plurality of ropes of the vehicle mitigating fence may terminate in a terminal, preferably a terminal provided on or in the ground. The last post in the series of posts of the vehicle mitigating fence may comprise means on or within the post for supporting the ropes. It is preferable for the ropes to enter the terminal from the end post at an angle that enables the separation of the vehicle mitigating fence and the anti-personnel fence to remain substantially constant. That is to say, even though a terminal for receiving the ends of the ropes of the vehicle mitigating fence is provided, this does not alter the line of the anti-vehicle or anti-personnel fence and no interruption or deviation thereof is required.
- It is a further advantage that, in the event of an impact to the combined barrier, the damage to the anti-personnel fence is localised such as to only affect a single or a small number of panels. Panels away from the vicinity of the impact remain intact or at least in a condition to withstand further impacts. The vehicle mitigating fence also remains in place with only a small number of posts in the area local to the impact itself being bent/deformed. The combined fence thus remains operable allowing time for repairs to be made thereto whilst still providing a good degree of security.
- In another aspect, a post footing for use with a security barrier is provided, as described above.
-
FIG. 1 shows a perspective view of a security barrier according to an embodiment of the invention; -
FIGS. 2 a to 2 c show front elevational views of sections of the security barrier according to an embodiment of the invention; -
FIGS. 3 a and 3 b are end views of the security barrier ofFIGS. 2 a to 2 c; -
FIG. 4 a is a top plan view of an end post and terminal according to an embodiment of the invention; -
FIG. 4 b is a top plan view of an end post and terminal according to another embodiment of the invention; -
FIG. 4 c is a top plan view of an end post and terminal according to a further embodiment of the invention; -
FIG. 5 a is a front perspective view of the end post of the embodiment ofFIG. 4 a; -
FIG. 5 b is a rear perspective view of an end post; -
FIGS. 6 to 8 show the security barrier ofFIG. 1 before and after an impact by a vehicle. -
FIG. 1 shows asecurity barrier 10. Thebarrier 10 comprises avehicle mitigating fence 20 for protecting an installation (not shown) against otherwise penetrative vehicular attacks. Thebarrier 10 further comprises ananti-personnel fence 40 designed to keep pedestrian intruders out of the installation. - The
anti-vehicle fence 20, e.g. Bristorm® manufactured by Hill & Smith Limited, is intended to restrain heavy vehicles impacting from a direction that is substantially perpendicular, or at an angle of between 25 and 90 degrees, to the line of the barrier. Breach of the barrier by a heavy goods vehicle in the order of 7500 kg inertial mass impacting the barrier at speeds of about 64-80 km/hr is prevented. - The
vehicle mitigating fence 20 comprises a series ofposts 22 mounted in the ground. A plurality ofropes 24 are supported on theposts 22. Theropes 24 may be plastic coated, high tensile steel ropes or cables that are pre-tensioned between theposts 22. - The
ropes 24 may be disposed at a height of between 300 mm and 2 metres above the ground. The height position of at least some of theropes 24 is selected to be such that the engine of an impacting vehicle will impact them.Ropes 24 may be provided at varying heights above the ground, for absorbing energy from a range of vehicles of varying sizes. - In the embodiment of
FIGS. 1 , 2 a-c, 3 a and 5 a-8, a pair ofwire ropes ropes first rope 24 a of the pair passes on a first side of afirst post 22, and on an opposite, second side of anadjacent post 22, and so on. Thesecond rope 24 b of the pair passes on a corresponding second side of thefirst post 22, and on a first side of the adjacent post, etc. Anadditional rope 24 c is sinuously woven between theposts 22 at a vertical position lower than therope pair further rope 24 d is sinuously woven between theposts 22 at a vertical position higher than therope pair additional ropes further rope 24 e is provided within aslot 26 in the top of theposts 22. Other configurations are envisaged, e.g. a different combination of woven and unwoven ropes, or with further woven rope pairs or additional woven or unwoven ropes. - As shown in
FIGS. 1 , 3 a and 5 b, theropes 24 are supported on theposts 22 using one ormore hooks 28 e.g. formed/angled from a stainless steel bar and fixed within corresponding apertures provided within theposts 22 e.g. with bolts. The design parameters of the barrier are such that, on impact, the intermediate posts are pushed back to incline away from the impact direction by up to 40 degrees. The angle of thehook 28 is such that theropes 24 will tend to separate from thehook 28 when theposts 22 are pushed back during impact. - The intermediate posts may be inclined relative to the vertical towards the predetermined direction, that is, towards the oncoming vehicle. The inclination of the intermediate post(s) to the vertical may be between 0 and 45 degrees, preferably between 0 and 20 degrees, and more preferably 10 degrees.
- The
barrier 10 may be provided as a perimeter security barrier—i.e. extending around and enclosing an installation, or a length thereof may be provided to e.g. span the distance between two buildings, walls or other solid structures. - Referring to
FIGS. 4 a-c and 5 a-b, at an end of thevehicle mitigating fence 20, theropes 24 pass around, or are supported by anend post 30. Theend post 30 is vertical and anchored in the ground. A rope support device is provided on theend post 30. In the embodiment ofFIG. 5 b, the rope support device is atab 31 welded or integrally formed with thepost 30. One or more apertures 31 a are provided within thetab 31 for receiving one ormore ropes 24. In the embodiment shown inFIG. 5 b, each of the fiveropes 24 pass through and are thus supported by a separate tab aperture 31 a. In alternative embodiments (not shown), the ropes may be supported by other means e.g. apertures or grooves/notches provided directly within thepost 30, or hooks or provided on thepost 30. - The
ropes 24 are anchored at each end thereof and terminate in arope terminal 32. In the embodiments ofFIGS. 4 a, 4 b, 4 c and 5 a, the terminal 32 is provided on or in the ground. Theground terminal 32 may be in the form of bolts or another suitable mechanical rope gripping device. The terminal 32 also holds the ropes in tension. The ropes may be tensioned after hanging on theposts 22, and the terminal 32 then acts to maintain the tension therein. A load or energy-absorbing device (not shown) may be provided between respective ends of theropes 24 and theposts 30/terminal 32. This device may be in the form of a hot rolled channel section or hollow tube that is configured to absorb energy transmitted from the impacting vehicle by the ropes. The energy-absorption means is designed to deform under the increased tension load in the ropes during impact by a vehicle. This limits the peak rope loads to tolerable levels and restrains the ropes in order that they develop tension to resist penetration or breach of the barrier by the impacting vehicle. - In the embodiment shown in
FIG. 4 a, the ropes pass around theend post 30 and are fed into the terminal 32 at an angle that is, generally speaking, approximately equal to or slightly greater than 90° relative to the initial direction of thefences ropes 24 pass through tab apertures 31 a as described above.FIG. 4 a shows an example of termination of thevehicle mitigating fence 20 earlier than theanti-personnel fence 40. -
FIG. 4 b shows an alternative embodiment wherein two runs of vehicle-mitigatingfence common end post 30. Theropes 24 of a firstvehicle mitigating fence 20 pass around theend post 30 as described above and terminate in a terminal 32. Theropes 24′ of a secondvehicle mitigating fence 20′ pass around theend post 30 as described above and terminate in asecond terminal 32′. Theropes fences - In each of the embodiments of
FIGS. 4 a and 4 b, theterminals 32 are inset from the line of the barrier 10 a little such that theropes 24 of thevehicle mitigating fence terminals fence 20. This enables thevehicle mitigating fence anti-personnel fence 40 to be situated close together, at substantially the same separation along the length of the barrier 10 (apart from in the vicinity of where theropes 24 pass around theend post 30—as can be seen inFIGS. 4 a, 4 b). In the embodiments ofFIGS. 4 a and 4 b, this enables thebarrier 10 to be provided with a 90° change of direction. If theterminals vehicle mitigating fence 20, this would necessitate a change in the line of theanti-personnel fence 20 e.g. by flaring it out around theterminals 32. Similarly, in some known wire rope barriers used for other purposes, the ropes thereof terminate in the end post itself (i.e. a ground terminal is not used) which, if incorporated in embodiments of the present invention, would also require flaring out of an adjacent anti-personnel fence. - It will also be appreciated that the
terminals vehicle mitigating fence FIGS. 4 a and 5 a could also be utilised in directing theropes 24 of asingle fence 20 to continue at a different angle—90° or otherwise—e.g. as would be required if thebarrier 10 is employed as a perimeter barrier. -
FIG. 4 c shows an alternative embodiment wherein termination of two runs ofvehicle mitigating fence ropes post 30 and exit at an angle to terminate inrespective terminals vehicle mitigating fences vehicle mitigating fence anti-personnel fence 40. - The
fences fences fences ropes 24 can be anchored at any angle relative to the original direction of a length offence 20, or in line therewith, depending on the site topography and/or installation requirements. Thefences - The
anti-personnel fence 40, e.g. Secureguard™ provided by Barkers Fencing, provides protection against wilful intrusion by people and is designed to mitigate against intruders climbing over and cutting through the fence. A series ofposts 42 are mounted in the ground. A plurality ofmesh panels 44 are secured to theposts 42 e.g. with tamper-proof bolts 45 (shown inFIG. 3 b). Alternatively, the anti-personnel fence may be of the chain link or palisade type. The mesh size is small (e.g. 75 mm×12.5 mm produced with 4.00 mm+/−0.10 mm wire). Theposts 42 are taller than those 22 of theanti-vehicle fence 20, e.g. by approximately a factor of 2, such that theanti-personnel fence 40 extends vertically beyond thevehicle mitigating fence 20. Theanti-personnel fence 40 is required to be tall in order to keep intruders out of the installation. The anti-personnel fence can be provided with or without strainer posts 46 e.g. as shown inFIGS. 4 b, 4 c. In an embodiment, strainer posts are used at corners and intermediate posts of theanti-personnel fence 40 where tensioned line wires are used to support the mesh (not shown). The strainer post has a “leg” bolted to the side of the post at an angle of about 45 degrees. - The
vehicle mitigating fence 20 and theanti-personnel fence 40 are mounted in the ground in close proximity to one another. Typically, the minimum spacing required therebetween is determined by the diameter of therope 24 plus space to allow access for installing/rehanging ropes etc. A typical rope diameter used is 15.7 mm (excluding the plastic coating that is preferably provided on the rope). Based on this, plus a small margin for tolerances plus allowing space for fitting/maintenance access, the gap between adjacent faces on theposts barrier 10 occupying only a small footprint on the land. This spacing allows for the fitting or removal of one of theropes 24 without the need to dismantle theentire fence 20. This is particularly important when repairing thebarrier 10 following an impact. - Referring again to
FIGS. 3 a and 3 b, thevehicle mitigating fence 20 and theanti-personnel fence 40 are mounted in the ground in a common footing orfoundation 50. Thefooting 50 is provided entirely within the ground. Afirst channel 52 is sized to receive the lower end ofpost 22 of theanti-vehicle fence 20. Asecond channel 54 is sized to receive the lower end ofpost 42 of theanti-intruder fence 40. In the embodiment shown, thechannel 52 for the vehicle mitigatingbarrier post 22 is wider and shallower than thechannel 54 for theanti-personnel barrier post 42. It will, however, be appreciated that eachchannel sized posts -
FIG. 3 b shows thefooting 50 and details of how the ends of theposts socket 53 a is provided within thechannel 52, the end of thepost 22 being received therein. Asimilar socket 53 b is provided within thechannel 54 with the end ofpost 42 being received therein. Eachsocket channels socket posts sockets posts fence 20 and theanti-personnel fence 40 above ground and can vary from post to post and for different installations. - One or more spacer blocks 55 are provided within the
footing 50 between thesocket 53 a for the vehicle-mitigatingfence post 22 and thesocket 53 b for theanti-personnel fence post 42. In the embodiment shown, two spacer blocks 55 are provided, welded or otherwise secured to theanti-vehicle post socket 53 a. The spacer blocks 55 can be of any size chosen to define the desired spacing between theposts socket 53 b for theanti-personnel fence post 42 is provided with one or more apertures (corresponding to the number of spacer blocks 55 being used) through which abolt 57 is provided. Thebolt 57 couples thesocket 53 b of theanti-personnel fence post 42 to thesocket 53 a and thus to the vehicle-mitigatingfence post 22. Additionally, theanti-personnel fence post 42 is provided with one or more apertures corresponding to the apertures in thesocket 53 b. Thebolt 57 can therefore pass through the apertures of theanti-personnel fence post 42 to couple thesocket 53 b and theanti-personnel fence post 42. The position of the apertures in thesocket 53 b,anti-personnel posts 42 and thus the position of the spacer blocks 55 can be chosen relative to thesocket 53 a for thepost 22 of the vehicle-mitigatingfence 20 to control the height of theanti-personnel fence 40 above the ground. It will be appreciated that thepost 42 of theanti-personnel fence 40 could be provided in a sleeve (not shown) such that one or bothposts footing 50. Thespacer block 55 could be welded or bolted (for example) to either or both sleeves. - A footplate 56 may be provided on the base of one or each of the
posts footplate 56 helps to secure thepost footing 50, especially since thepost - The two
fences sockets footing 50 is a concrete footing such that the ends of theposts - In order to erect the
barrier 10, the coupledsockets anti-personnel fence post 42 are positioned and suspended within a hole in the ground at the desired height within the hole (defined by the predetermined height of thesockets sockets mesh panels 44 are then attached to theposts 42 of the anti-personnel fence, and theropes 24 are mounted on theposts 22 of the vehicle-mitigatingfence 20, terminating at the end posts 30 andterminals 32. - As can be seen in
FIGS. 2 , 4 a, 4 b and 4 c a largercommon footing 60 is provided in which anend post 30 and one or moreadjacent fence posts common footing 60, preferably concrete, can be of any size to accommodate the required number ofposts ground terminals footing 60. -
FIG. 6 shows asecurity fence 10 according to embodiments of the invention just prior to a collision by an oncoming vehicle. Thefence 10 is constructed so that an impacting vehicle will first make contact with theanti-personnel fence 40, and then with thevehicle mitigating fence 20. As discussed above, the majority of theropes 24 of thevehicle mitigating fence 20 are provided at a height that corresponds to the front/bumper of the vehicle. An impacting vehicle makes contact with theropes 24 which push back on theposts 22. This transmits energy to theposts 22 adjacent to the impact zone, thereby spreading the impact load along the length of thefence 20. Impact energy is also dissipated through the posts into thecommon footing 50 and into the ground. -
FIGS. 7 and 8 show thesecurity barrier 10 after an impact has occurred. It can be seen that theposts 22 of thevehicle mitigating fence 20 in the vicinity of the impact have been bent or deformed, but are still standing with at least some of theropes 24 being maintained in position with respect to theposts 22. Away from the impact zone, theposts 22 remain upright with theropes 24 substantially in their original positions. Although damaged, theanti-vehicle fence 20 is still capable of withstanding further impacts from vehicles along its length, and especially away from the point of impact. - Directly in the vicinity of the impact the
panels 44 of theanti-personnel fence 40 have been damaged. The construction of thefence 40, wherebymesh panels 44 are bolted to theposts 42, means that in the event of an impact thepanels 44 in the impact area are stripped from theposts 42, shown clearly inFIG. 8 . Since thefence 40 more easily succumbs to damage under impact, the degree of damage away from the point of impact is less such that only one, two or threepanels 44 andposts 42 may be damaged. The remainder of thefence 40 remains substantially undamaged. - It is therefore easy and inexpensive to replace damaged
panels 44 andposts security barrier 10 to full containment. - Embodiments of the invention employ separate anti-personnel and anti-vehicle fences, independent above ground, which advantageously provide great flexibility in that the design can be adapted to match an existing perimeter or to provide whatever level of perimeter protection is desired.
Claims (21)
1-17. (canceled)
18. A security barrier comprising:
a first fence having a first series of posts;
a second fence having a second series of posts, the first and second fences being adjacent to each other; and
a plurality of common footings, each footing having a first post socket for receiving a first post from the first fence and a second post socket for receiving a first post from the second fence, the first and second post sockets separated from one another by a distance,
wherein, for at least a portion of the security barrier, the common footings couple the first and second fences to one another below ground level and the first and second fences extend in substantially a same direction as each other.
19. The barrier of claim 18 , wherein the coupling between the first and second fences is provided between the first post socket and the second post socket.
20. The barrier of claim 18 wherein the footing is formed of concrete.
21. The barrier of claim 18 , wherein the first post socket and/or the second post socket is a liner provided within the footing.
22. The barrier of claim 18 , wherein the first and second post sockets are of different dimensions.
23. The barrier of claim 18 , further comprising a connector for connecting the first post of the first fence with the first post of the second fence within the footing.
24. The barrier of claim 23 , wherein the connector comprises one or more bolts connecting the respective posts of the first fence and the second fence.
25. The barrier of claim 18 , further comprising a spacer for separating the first post socket from the second post socket within the footing.
26. The barrier of claim 18 , wherein the first posts of the first and second fences are separated by a distance of about 2 cm to 10 cm.
27. The barrier of claim 26 , wherein the first posts of the first and second fences are separated by a distance of about 5.5 cm.
28. The barrier of claim 18 wherein the first fence is an anti-personnel fence configured to prevent access from personnel and the second fence is a vehicle mitigating fence configured to withstand an impact from a vehicle.
29. The barrier of claim 28 , wherein the anti-personnel fence is situated with respect to the vehicle mitigating fence such that the anti-personnel fence will be impacted first in the event of an impact by a vehicle.
30. The barrier of claim 18 , wherein the second fence comprises a plurality of wire ropes supported on the second series of posts.
31. The barrier of claim 30 , wherein at least one of the plurality of ropes terminates in a ground terminal.
32. The barrier of claim 31 , wherein a last post in the second series of posts comprises a support provided on or within the post for supporting at least one of the plurality of ropes.
33. The barrier of claim 32 , wherein the ropes of the second fence enter the ground terminal from an end post at an angle that such that a separation of the first and second fences remains substantially constant.
34. A security barrier comprising:
first and second spaced apart fences, at least a portion of the first and second fences extending in substantially the same direction as one another, the first and second fences each defined, in part by posts,
wherein at least some of the respective posts of the first and second fences are coupled to one another below a ground level.
35. The security barrier of claim 34 wherein one of the fences is an anti-personnel barrier and the other fence is a vehicle mitigating fence.
36. The security barrier of claim 34 wherein the first and second fences are coupled to one another by footings disposed so as to secure respective posts of the first and second fences to each other in a spaced relationship.
37. The security barrier of claim 36 wherein the footings include sleeves for receiving the respective posts of the first and second fences, the sleeves being formed from a material different from a material of the footings.
Applications Claiming Priority (3)
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GB1113601.7 | 2011-08-05 | ||
GBGB1113601.7A GB201113601D0 (en) | 2011-08-05 | 2011-08-05 | Security barrier |
PCT/GB2012/051904 WO2013021189A1 (en) | 2011-08-05 | 2012-08-06 | Security barrier |
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US20140339486A1 true US20140339486A1 (en) | 2014-11-20 |
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AU (1) | AU2012293507A1 (en) |
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US20150299968A1 (en) * | 2012-11-27 | 2015-10-22 | Highway Care Limited | Barrier System |
US20170138535A1 (en) * | 2015-11-13 | 2017-05-18 | Joseph Edward Jill | Safety guard |
US20180044983A1 (en) * | 2016-08-12 | 2018-02-15 | Rajiv R. Prasad | Fence opening and fence system |
USD877932S1 (en) | 2018-03-27 | 2020-03-10 | Industrial Fence, Inc. | Security fence |
USD886325S1 (en) | 2018-04-04 | 2020-06-02 | Industrial Fence, Inc. | Security fence |
US10889977B1 (en) * | 2019-11-26 | 2021-01-12 | A.H. Beck Foundation Co. Inc. | Border security barrier |
CN112610068A (en) * | 2021-01-14 | 2021-04-06 | 深圳市开而美科技有限公司 | Lifting fence |
US11021843B2 (en) * | 2018-12-18 | 2021-06-01 | Korea Institute Of Civil Engineering And Building Technology | Energy absorbing post having sliding rail assembly |
USD945015S1 (en) | 2020-01-16 | 2022-03-01 | Industrial Fence, Inc. | Fence post with rails |
US20220136275A1 (en) * | 2020-08-14 | 2022-05-05 | Jeffrey Julian | Temporary shelter |
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US8905671B2 (en) * | 2013-03-08 | 2014-12-09 | John Weatherwax | High speed raceway barrier |
GB2519788B (en) * | 2013-10-30 | 2020-06-10 | Hill & Smith Ltd | Safety Barrier |
CH714271A2 (en) * | 2017-10-27 | 2019-04-30 | Scandic Staal Ab | Road safety barriers. |
RU191852U1 (en) * | 2019-04-30 | 2019-08-26 | Закрытое акционерное общество "Центр специальных инженерных сооружений научно-исследовательского и конструкторского института радиоэлектронной техники" (ЗАО "ЦеСИС НИКИРЭТ") | ANTI-BAR |
GB2622766A (en) * | 2022-07-19 | 2024-04-03 | Barkers Eng Ltd | Crash fence assembly |
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JPS6011137Y2 (en) * | 1982-02-01 | 1985-04-13 | 株式会社新潟フエンス工業 | Intermediate terminal support for guard cable |
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-
2011
- 2011-08-05 GB GBGB1113601.7A patent/GB201113601D0/en not_active Ceased
-
2012
- 2012-08-06 AU AU2012293507A patent/AU2012293507A1/en not_active Abandoned
- 2012-08-06 WO PCT/GB2012/051904 patent/WO2013021189A1/en active Application Filing
- 2012-08-06 US US14/237,125 patent/US20140339486A1/en not_active Abandoned
- 2012-08-06 EP EP12753208.3A patent/EP2739789A1/en not_active Withdrawn
- 2012-08-06 GB GB1213952.3A patent/GB2493829A/en not_active Withdrawn
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150299968A1 (en) * | 2012-11-27 | 2015-10-22 | Highway Care Limited | Barrier System |
US20170138535A1 (en) * | 2015-11-13 | 2017-05-18 | Joseph Edward Jill | Safety guard |
US20180044983A1 (en) * | 2016-08-12 | 2018-02-15 | Rajiv R. Prasad | Fence opening and fence system |
US10202804B2 (en) * | 2016-08-12 | 2019-02-12 | Rajiv R. Prasad | Fence opening and fence system |
USD877932S1 (en) | 2018-03-27 | 2020-03-10 | Industrial Fence, Inc. | Security fence |
USD886325S1 (en) | 2018-04-04 | 2020-06-02 | Industrial Fence, Inc. | Security fence |
US11021843B2 (en) * | 2018-12-18 | 2021-06-01 | Korea Institute Of Civil Engineering And Building Technology | Energy absorbing post having sliding rail assembly |
US10889977B1 (en) * | 2019-11-26 | 2021-01-12 | A.H. Beck Foundation Co. Inc. | Border security barrier |
USD945015S1 (en) | 2020-01-16 | 2022-03-01 | Industrial Fence, Inc. | Fence post with rails |
US20220136275A1 (en) * | 2020-08-14 | 2022-05-05 | Jeffrey Julian | Temporary shelter |
CN112610068A (en) * | 2021-01-14 | 2021-04-06 | 深圳市开而美科技有限公司 | Lifting fence |
Also Published As
Publication number | Publication date |
---|---|
WO2013021189A1 (en) | 2013-02-14 |
GB2493829A (en) | 2013-02-20 |
GB201113601D0 (en) | 2011-09-21 |
EP2739789A1 (en) | 2014-06-11 |
GB201213952D0 (en) | 2012-09-19 |
AU2012293507A1 (en) | 2013-05-02 |
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Legal Events
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