EP0085681B1 - A concrete foot-structure for posts or a concrete-post plinth having a fracture mechanism cast therein; and a method for manufacturing such a foot structure or plinth - Google Patents

A concrete foot-structure for posts or a concrete-post plinth having a fracture mechanism cast therein; and a method for manufacturing such a foot structure or plinth Download PDF

Info

Publication number
EP0085681B1
EP0085681B1 EP82901032A EP82901032A EP0085681B1 EP 0085681 B1 EP0085681 B1 EP 0085681B1 EP 82901032 A EP82901032 A EP 82901032A EP 82901032 A EP82901032 A EP 82901032A EP 0085681 B1 EP0085681 B1 EP 0085681B1
Authority
EP
European Patent Office
Prior art keywords
foot structure
plinth
concrete
fracture mechanism
post
Prior art date
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.)
Expired
Application number
EP82901032A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0085681A1 (en
Inventor
Stig Thim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A-BETONG AB/SABEMA MATERIAL AB
Sabema Material AB
Abetong AB
Original Assignee
A-BETONG AB/SABEMA MATERIAL AB
Sabema Material AB
Abetong AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by A-BETONG AB/SABEMA MATERIAL AB, Sabema Material AB, Abetong AB filed Critical A-BETONG AB/SABEMA MATERIAL AB
Priority to AT82901032T priority Critical patent/ATE14772T1/de
Publication of EP0085681A1 publication Critical patent/EP0085681A1/en
Application granted granted Critical
Publication of EP0085681B1 publication Critical patent/EP0085681B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
    • E01F9/631—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection specially adapted for breaking, disengaging, collapsing or permanently deforming when deflected or displaced, e.g. by vehicle impact
    • E01F9/635—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection specially adapted for breaking, disengaging, collapsing or permanently deforming when deflected or displaced, e.g. by vehicle impact by shearing or tearing, e.g. having weakened zones

Definitions

  • the present invention relates to a concrete foot structure for posts or a concrete-post plinth having a fracture mechanism cast therein.
  • the foot structure or plinth is intended to reinforce a wooden post or column erected in the ground, and to eliminate the disadvantages created by the rotting of the post at ground level.
  • a foot structure or plinth according to the invention can also be used as a foundation element for concrete posts, or posts made of some other material, it not being necessary for the post to have previously been in contact with the ground.
  • a prime object of the present invention is to provide a concrete foot structure for posts or a concrete plinth with which the risk of injurytothe occupants of a vehicle colliding therewith is far less than would previously have been the case.
  • a further object of the invention is to provide a foot structure or plinth of the aforementioned kind which can be readily manufactured and mounted to an existing post or pole in the ground and/or which can serve as a separate or integral foundation element.
  • a foot structure or plinth according to the invention is mainly characterized in that the fracture mechanism comprises a plate which is cast in the central region of the foot structure or the plinth and which is arranged to facilitate shearing of the foot structure or plinth when they are subjected to horizontally acting impact forces.
  • a foreign body of the aforementioned kind made, for example of a plastics material or metal, which will not adhere to the concrete when cast therein will weaken the foot structure or plinth to the extent desired, so that said foot structure or plinth will shear when subjected to impact forces.
  • the fracture plate is preferably placed in the region of the largest cross-sectional area of the foot structure or plinth, approximately on a level with the surface of the ground or at a location somewhat above the ground surface.
  • the concrete will crack around the plate, particularly in the region of the reinforcing rods when such rods are included in the foot structure or plinth.
  • the concrete will break up causing the foot structure to shear.
  • the foot structure or plinth incorporate reinforcing rods, the rods will bend under impact in regions above and beneath the fracture plate, and probably cause the concrete to crack in these regions.
  • a wooden post or pole is normally weakened by rotting of that part of the post located within the ground, and hence is readily broken off at said part when subjected to impact.
  • a foot structure according to the invention greatly stiffens the post or pole with which it is used, the shear strength is considerably reduced because of the inventive design of said foot structure, thereby enabling the extent of damage to a vehicle colliding with a wooden or concrete post to be greatly reduced.
  • the configuration of the fracture mechanism is suitably adapted to the cross-sectional shape of the foot structure, and said mechanism is suitably provided with holes or openings through which reinforcing rods can extend in the longitudinal direction of the foot structure.
  • this adaptation of the configuration of the fracture mechanism to the cross-sectional shape of the foot structure enables the fracture mechanism to be correctly positioned and reliably held within the foot structure.
  • the openings provided in the fractured plate are arranged to accommodate sleeve-like holder means for reinforcing rods, permitting said rods to move relative to the plate. This facilitates the aforementioned desired formation of cracks in the foot structure when the post is subjected to impact forces.
  • the formation of cracks is further facilitated when, in accordance with a preferred embodiment of the invention, the plate is slotted or grooved in the region of said openings, such as to promote the formation of cracks when the post or foot structure is subjected to impact forces.
  • the configuration of the fracture plate is suitably adapted to the cross-sectional shape of the foot structure.
  • the fracture plate may have a substantially triangular shape with a corresponding opening in the region of the side thereof located adjacent that part of the foot structure intended to lie against the periphery of the wooden post.
  • the fracture plate may have substantially the shape of the letter Y, whereat the foot structure itself can also be given an aesthetic Y-profile.
  • the foot structure may include three fracture mechanisms, namely one in its central part and one in the region of each end of the structure.
  • the foot structure may have a length of about 1.5m and can be driven into the ground adjacent a wooden post or pole, using suitable tools, whereafter the foot structure can be connected to the post by means of, for example, iron strip, iron hoops or like securing elements, using tools suitable herefor.
  • the foot structure may be placed in a hole and optionally arranged to support the post.
  • the invention also relates to a method of manufacturing a concrete foot structure, said method being mainly characterized by the steps of arranging reinforcing rods in a horizontal mould and passing said rods through respective openings in at least one plate-like fracture mechanism having a shape adapted to the cross-sectional shape of the mould, such that the fracture mechanism supports the reinforcing rods in the mould; and casting concrete into the mould and allowing said concrete to set, whereafter the finished foot structure obtains a weakened part in the region of the plate-like fracture element which will yield when subjected to shear forces.
  • Manufacture is facilitated by using one or more plate-like fracture elements as jigs, which ensure that the reinforcing rods are correctly positioned in the mould.
  • Simple means are used at the same time to ensure that the plate-like fracture mechanism or mechanisms used is or are also correctly positioned.
  • a wooden post 1 having a rotten base portion 1a is shown positioned in the ground 2 and joined to a foot structure 4 by means of clamps 3, comprising, for example, iron hoops mounted by means of a suitable tool (not shown).
  • clamps 3 comprising, for example, iron hoops mounted by means of a suitable tool (not shown).
  • the foot structure 4 will be described initially with reference to Figures 1-4.
  • the illustrated foot structure has a substantially Y-shaped configuration with a longitudinally extending receiving portion 4a arranged to abut the periphery of the wooden post 1.
  • the thickest part of the foot structure 4 lies approximately centrally of said structure, or slightly above said centre, the foot structure tapers slightly towards the ends thereof.
  • the lower end of the foot structure is somewhat pointed, enabling the foot structure to be driven into the ground using a suitable percussion tool, and then connected to the wooden post 1.
  • the foot structure 4 Extending through the foot structure 4 are three reinforcing rods 5, which between them support a Y-shaped fracture mechanism 6.
  • the fracture element 6 is provided with slots or recesses 6a and with slotted sleeves 6b, in which the reinforcing rods 5 are inserted.
  • the cross-sectional view in Figure 3 also contributes to illustrating the design of sleeves 6b.
  • the fracture element 6 is suitably made of a polyethylene plastics material and may have a thickness of about 3mm.
  • the fracture element weakens the foot structure so that said structure will shear when the wooden post 1 is subjected to powerful impact forces, for example when a vehicle is in collision with the post.
  • Figure 4 is intended to illustrate what happens inside the foot structure when the post or said foot structure are subjected to impact forces.
  • the reinforcing rods 5 are able to move freely through the plastic sleeves 6b to a certain extent, which sleeves also exhibit crack-promoting means in the form of slots 6a.
  • the reinforcing rods are able to deform to a certain extent, causing a greater amount of concrete to break up.
  • the amount of concrete which is broken up is so great that the whole of the post can be compressed on one side thereof.
  • the reinforcing rods are bent outwardly instead. This breaking up of the concrete causes the kinetic energy of the vehicle to be progressively absorbed, while slowing the vehicle down.
  • Figures 5 and 6 illustrate a modified foot structure 4, provided with a triangular fracture mechanism 6 provided with holes and recesses for accommodating four reinforcing rods 5.
  • a triangular fracture mechanism 6 provided with holes and recesses for accommodating four reinforcing rods 5.
  • two plastics, fracture elements 6 are welded together to form a single unit.
  • the fracture mechanism of this embodiment is also provided with slots 6a accommodating sleeves 6b which surround the reinforcing rods 5.
  • the foot structure 4 according to the invention includes four fracture mechanisms 6 of the kind illustrated in Figure 2 and Figure 5 respectively.
  • a fracture mechanism can be arranged in the region of each end of said structure.
  • the fracture mechanisms 6 can also facilitate the manufacture of a foot structure.
  • reinforcing rods 5 of adjusted lengths are passed through the sleeves 6b of a respective fracture mechanism 6, whereafter the fracture mechanism, which may optionally include three fracture plates, is placed in a horizontal mould. This ensures that both the reinforcing rods 5 and the fracture mechanisms 6 are correctly positioned in the mould. Concrete is then poured into the mould and allowed to harden, whereafter the foot structure is ready for use. In this way, the foot structure will have a weakened portion in the region of the central fracture mechanism 6, which causes the foot structure to shear off when subjected to forces of the kind beforementioned.
  • the foot structure may be used as a foundation element or plinth, for example, for a concrete or wooden post.
  • the foot structure can then be accommodated, either completely or partially, in, for example, a hole dug in the ground to anchor the post.
  • the foot structure may comprise a part separate from the post arranged to support the major part of the post in some suitable fashion, or may also be an integral part of the post itself. In all cases the foot structure has a weakened portion which facilitates shearing of the post when said post is subjected to impact forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Floor Finish (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
EP82901032A 1981-03-20 1982-03-19 A concrete foot-structure for posts or a concrete-post plinth having a fracture mechanism cast therein; and a method for manufacturing such a foot structure or plinth Expired EP0085681B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82901032T ATE14772T1 (de) 1981-03-20 1982-03-19 Fussteil aus beton fuer pfosten oder saeulensockel aus beton mit einem darin eingegossenen bruchmechanismus; sowie ein verfahren zur herstellung solch eines fussteils oder sockels.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8101798 1981-03-20
SE8101798A SE8101798L (sv) 1981-03-20 1981-03-20 Stolpfot av betong samt sett att tillverka sadan

Publications (2)

Publication Number Publication Date
EP0085681A1 EP0085681A1 (en) 1983-08-17
EP0085681B1 true EP0085681B1 (en) 1985-08-07

Family

ID=20343387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901032A Expired EP0085681B1 (en) 1981-03-20 1982-03-19 A concrete foot-structure for posts or a concrete-post plinth having a fracture mechanism cast therein; and a method for manufacturing such a foot structure or plinth

Country Status (6)

Country Link
EP (1) EP0085681B1 ( )
DE (1) DE3265158D1 ( )
DK (1) DK513082A ( )
NO (1) NO823857L ( )
SE (1) SE8101798L ( )
WO (1) WO1982003241A1 ( )

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4697396A (en) * 1983-05-04 1987-10-06 R.F.D. Consultants Pty. Ltd. Utility pole support
CA2097339A1 (en) * 1993-05-31 1994-12-01 Steve Legler Distribution pole
FR2925078B1 (fr) * 2007-12-18 2009-11-27 Nadia Signalisation Dispositif de fixation d'un poteau sur un massif en beton
IT1403797B1 (it) * 2011-01-13 2013-10-31 Eurocap S P A Sistema di fondazione prefabbricata per plinto isolato e procedimento di posa di tale sistema
FR3033804B1 (fr) * 2015-03-18 2019-07-26 Lacroix Signalisation Dispositif de securite pour fixer un mat au sol
KR102119595B1 (ko) * 2018-05-31 2020-06-08 충남대학교산학협력단 방호벽

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002167A1 (en) * 1988-08-23 1990-03-08 Anidral S.R.L. Kit for the reactivation of dehydrated microbial cultures, particularly of bacteria

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2121365B1 ( ) * 1971-01-06 1977-06-17 Colombier Marc
US3837752A (en) * 1973-01-26 1974-09-24 J Shewchuk Coupling for break away pole bases
CH572131A5 (en) * 1973-11-23 1976-01-30 Porticus Patent Ag Roadside post with fracture point - ground level adaptor sleeve for interchangeability
AU507790B2 (en) * 1977-08-29 1980-02-28 Blanchard Chisholm Douglas Pole support
JPS56500385A ( ) * 1979-04-06 1981-03-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990002167A1 (en) * 1988-08-23 1990-03-08 Anidral S.R.L. Kit for the reactivation of dehydrated microbial cultures, particularly of bacteria

Also Published As

Publication number Publication date
WO1982003241A1 (en) 1982-09-30
EP0085681A1 (en) 1983-08-17
NO823857L (no) 1982-11-18
DK513082A (da) 1982-11-18
SE8101798L (sv) 1982-09-21
DE3265158D1 (en) 1985-09-12

Similar Documents

Publication Publication Date Title
US5636482A (en) Wood fence post repair device and method
EP0085681B1 (en) A concrete foot-structure for posts or a concrete-post plinth having a fracture mechanism cast therein; and a method for manufacturing such a foot structure or plinth
US20020166302A1 (en) Footing for sound-barrier walls
US6918567B2 (en) Concrete panel with gripping ribs and method of use
EP0244261B1 (en) Piling
KR102120647B1 (ko) 가공석재와 콘크리트의 합성블록 및 그 제작방법
JP3094369B2 (ja) プラスチック製型枠
KR100583879B1 (ko) 기초공사용 파일의 캡 조립체
KR100583880B1 (ko) 콘크리트 파일을 이용한 기초공사 구축 공법
JP2912554B2 (ja) ガードフェンス
JPS6122088B2 ( )
JP3029343U (ja) 露出型弾性固定柱脚工法におけるモルタル材注入用型枠具
JP2504578B2 (ja) 鉄骨基礎の施工方法
JP3156197B2 (ja) 既製コンクリート杭と基礎スラブコンクリートとの杭頭接合構造
WO1982000170A1 (en) Fence construction
JP4036411B2 (ja) 吹き付け法枠
JP2536742Y2 (ja) コンクリート打設工事用箱抜き管材の取付具
JPH0714433Y2 (ja) コンクリート杭頭とフーティングとの連結構造
JP2001020296A (ja) 鉄骨鉄筋コンクリート造の非埋め込み型柱脚部
JPH0647969Y2 (ja) 鉄筋アンカー
JPH06129102A (ja) 柱型枠
JP2006138068A (ja) 土留め壁を備えたｌ型側溝
JP2003013502A (ja) 柱接合金物、基礎と柱との接合構造、柱接合金物の製造方法、柱接合金物の設置方法、設置用治具、建築用鋼材
JP2643760B2 (ja) 基礎梁の構築方法
KR20220027415A (ko) 가드레일 지주의 지지력 보강구조

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830412

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19850807

Ref country code: LI

Effective date: 19850807

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19850807

Ref country code: CH

Effective date: 19850807

Ref country code: BE

Effective date: 19850807

Ref country code: AT

Effective date: 19850807

REF Corresponds to:

Ref document number: 14772

Country of ref document: AT

Date of ref document: 19850815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3265158

Country of ref document: DE

Date of ref document: 19850912

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

EN Fr: translation not filed
26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19861202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881122

EUG Se: european patent has lapsed

Ref document number: 82901032.1

Effective date: 19880215