EP2016229B1 - Clip-on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system - Google Patents

Clip-on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system Download PDF

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Publication number
EP2016229B1
EP2016229B1 EP07724977A EP07724977A EP2016229B1 EP 2016229 B1 EP2016229 B1 EP 2016229B1 EP 07724977 A EP07724977 A EP 07724977A EP 07724977 A EP07724977 A EP 07724977A EP 2016229 B1 EP2016229 B1 EP 2016229B1
Authority
EP
European Patent Office
Prior art keywords
connector
geogrid
clip
arms
blocks
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.)
Active
Application number
EP07724977A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2016229A1 (en
Inventor
Christopher Martin
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.)
MARTIN, CHRISTOPHER
Tenax International Bv Amsterdam Succursale Di
Original Assignee
Tenax International Amsterdam Succursale Di Lugano BV
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 Tenax International Amsterdam Succursale Di Lugano BV filed Critical Tenax International Amsterdam Succursale Di Lugano BV
Priority to PL07724977T priority Critical patent/PL2016229T3/pl
Publication of EP2016229A1 publication Critical patent/EP2016229A1/en
Application granted granted Critical
Publication of EP2016229B1 publication Critical patent/EP2016229B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements

Definitions

  • the present invention relates to a clip-on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system.
  • the invention relates to a clip-on connector that overcomes some of the outstanding problems in connecting dry laid segmental blocks to geogrids used for reinforced soil retaining structures, in particular achieving full pull out strength connection with the geogrids having high conjunction strength.
  • the connector also provides for the ability to be used with blocks having a connection profile in one bed face only or shared between both top and bottom bed faces or with hollow blocks.
  • Geogrids which have a high junction strength between the warp and weft elements of the grid are typically extruded HDPE or modified sheet HDPE materials. These are characterised by the large cross sectional differences between the thin strong tensile elements of the grid and the thicker junction areas of the grid. This type of grid needs careful attention to the connection with segmental blocks. The aim is to obtain a full strength connection between the two. That is to say the connection strength should be equal to the manufactured tensile strength of the geogrid usually taken over one metre width.
  • each tensile element of the grid must be supported by or connected to the blocks. This assumes any frictional connection between the grid and blocks is ignored since this is unreliable and dependant on the pressure between the blocks.
  • the grid has to be manually held in place on top of the blocks whilst further blocks are placed on top of the grid and means of connection.
  • pins per block are used to connect the upper and lower blocks and theses pins are the sole method of mechanical connection between the grid and blocks and hence can not provide a full strength connection, any other connection being frictional.
  • These pins are sometimes either a very good fit in the holes in the blocks or a very loose fit. In both cases they are disadvantageous because if they are a good fit, they restrict the freedom of the wall to take up uneven settlement and, when a bad fit, they do not provide a good location for the blocks or positive connection with the grid.
  • WO-94/13890 discloses a retaining wall block in combination with a geogrid, whereby a cavity is provided adjacent a rear wall of the block, such cavity being accessed by a longitudinal channel.
  • a trasverse rib of a sheet of geogrid material is slid and retained in the cavity.
  • a clip may be used to increase the thickness of the trasverse rib of the geogrid material.
  • the clip includes an elongate member arranged along the line of the transverse rib, and having planarly extending from one edge thereof a plurality of fingers, a number of which are bent around the transverse rib to crimp the clip into position on the geogrid material, and an alternative number remaining extending parallel to the longitudinal ribs of the geogrid material for easier handling of the geogrid.
  • the aim of the invention is to provide a connector that overcomes the drawbacks of the prior art, being able to be connected to a geogrid without the risk that the handling of the geogrid causes the connector to fall off the geogrid.
  • an object of the present invention is to provide a connector with a geogrid that can be used with different blocks.
  • Another object of the present invention is to provide a connector with a geogrid that is of easy manufacturing, highly reliable and at low cost.
  • the connector used in a combination "connector-geogrid" according to the present invention is a connector in the form of a clip.
  • the connector comprises a base 3 from which at least one finger 4 develops towards an edge of the base and defines with such edge a clip with arms 5 and 6, the arm 6 being part of the base 3 and the arm 5 being part of the finger 4.
  • the clip is adapted to passes over a thick transverse bar 7 of uni-axial HDPE/Polypropylene extruded or punched sheet geogrid 2 and provides fingers which occupy the ends of elliptical apertures 8 between high tensile ribs 9 which both extend at generally right angles between the transverse bars 7 of the geogrid 2.
  • the radius in the throat of the connector clip centres the thick transverse bar 7 of the geogrid 2 on the finger part 4 of the connector under load.
  • the cross section of the geogrid 2 varies with its tensile strength ans so the clip part of the connector has to accommodate this variation.
  • the finger part 4 of the connector 1 is designed to provide a mechanical connection with the geogrid 2 against pullout forces trying to separate the geogrid 2 from blocks 10.
  • the clip defined by the at least one finger portion and the edge of the base portion presents a spacing between the two arms that is smaller than the thickness of the portion of the geogrid whereon the connector has to be coupled, but such that said geogrid portion can be inserted between said two arms.
  • the connector has to be coupled to the geogrid so that the geogrid comes to be inserted between the two arms of the connector.
  • the connector In applications where the connector 1 is in a housing 11 shared between top and bottom bed faces of the blocks 10 ( figure 8 ), the connector also provides a shear key connection between these adjacent blocks 10 thus eliminating the need for any secondary block to block connection means.
  • the connector 1 provides the pull out resistance for the geogrid 2 only and some other means have to be provided for the block to block shear connection.
  • the clip-on connector 1 as a single piece would normally have a maximum of three fingers 4. However, different number of fingers could be provided.
  • connector 1 Alternatively to make the connector 1 fully universal and to ease its application on site, single fingers connectors strung together in groups of perhaps 10 or 20 can be used.
  • figure 11 shows single finger connectors strung together on two wires 15 that pass through holes 16 provided in the base 3 of the connectors.
  • wires 15 can be made of plastic, pultrusions or stainless steel and in this case the fingers 4 are free to float since the individual connector fingers 4 are narrower than the pitch of the apertures 8 of the geogrid.
  • Single finger connectors could also be used individually.
  • One leg or arm of the clip part of the connector can be straight, for example the arm 6 that is part of the base 3.
  • a further advantage of the present connector is that the path of the geogrid is undisturbed being in a straight line.
  • the applications can be one or both of these or a combination of the two depending on the particular hollow block design.
  • connection system The clip-on nature of this connection system is of benefit to the use with hollow blocks since they can be pitched along the geogrid 2.
  • This clip-on feature of the blocks is of advantage generally on site since the connectors 1 can not be missed or dislodged once placed on the geogrid 2.
  • the connectors 1 can also be used with woven or knitted geogrids 2 usually made from polyester fibres coated in PVC.
  • the strength of the pull out resistance of the connection will depend on the junction strength of the geogrids warp and weft fibres.
  • Figures 12a-12d illustrate a solid segmental block 20 with the connection profile shared between the upper and lower bed faces of the blocks and also the rib topped block used in the system for courses where there is no geogrid requirement.
  • Figure 13 shows a typical reinforced soil structure with the blocks and connectors shown in figures 12a-12d and 8 .
  • the connector of the combination "connector-geogrid" achieves the above aim and objects since it can be firmly coupled to a geogrid without any possibilities of accidental disconnection.
  • an injection moulded one or two or three finger clip is supplied which is inserted through the apertures of the geogrid and by its unique design clips over the thick transverse bar of the geogrid.
  • the two are connected together and can only be separated by deliberate manual intervention.
  • the connector can be accommodated inside recesses defined in the blocks between which the geogrid is placed.
  • connector-geogrid Another advantage of the connector of the combination "connector-geogrid" of the invention over the prior art is that it can be used in blocks where a groove can be placed at the top of the block, only the bottom of the mating block being substantially flat. In this case a method of providing shear connection between the blocks must be arranged.
  • a further advantage is that the connector of the combination "connector-geogrid" of the invention can be used with hollow blocks with a groove correctly placed in the top only.
  • a further advantage is that the present connector does not require a second groove in the top or bottom of the block to accommodate the thick transverse (warp) bar of the grid since it is housed within the connector itself.
  • the present clip-on connector can also act as an inter block shear connector by locating the top block to the bottom block.
  • the present connector also keeps the grid in a horizontal plane so that the pull out forces are kept horizontal and hence the disturbing forces between the blocks are at a minimum.
  • the connector is housed in grooves in the top and bottom of the blocks or in the top of the block only the thin tensile fingers of the grid can be carried forward to the front of the block as well as to the rear of the block so that the blocks remain parallel in both planes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Clamps And Clips (AREA)
  • Retaining Walls (AREA)
  • Connection Of Plates (AREA)
  • Housing For Livestock And Birds (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
EP07724977A 2006-05-10 2007-05-08 Clip-on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system Active EP2016229B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07724977T PL2016229T3 (pl) 2006-05-10 2007-05-08 Łącznik zatrzaskowy do geosiatki dla systemu połączenia mechanicznego dla muru oporowego z bloków segmentowych z gruntem zbrojonym

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0609204.3A GB0609204D0 (en) 2006-05-10 2006-05-10 Clip on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system
PCT/EP2007/004053 WO2007128566A1 (en) 2006-05-10 2007-05-08 Clip-on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system

Publications (2)

Publication Number Publication Date
EP2016229A1 EP2016229A1 (en) 2009-01-21
EP2016229B1 true EP2016229B1 (en) 2011-04-13

Family

ID=36637192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07724977A Active EP2016229B1 (en) 2006-05-10 2007-05-08 Clip-on connector to geogrid for segmental block reinforced soil retaining wall mechanical connection system

Country Status (12)

Country Link
US (1) US20090142145A1 (pl)
EP (1) EP2016229B1 (pl)
CN (1) CN101443519B (pl)
AT (1) ATE505592T1 (pl)
CA (1) CA2650620A1 (pl)
DE (1) DE602007013888D1 (pl)
ES (1) ES2365170T3 (pl)
GB (1) GB0609204D0 (pl)
MX (1) MX2008014360A (pl)
PL (1) PL2016229T3 (pl)
RU (2) RU65515U1 (pl)
WO (1) WO2007128566A1 (pl)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8413399B2 (en) 2010-02-10 2013-04-09 Michael L. Kelley, Jr. Block combinable with other similar blocks to form a wall, and related systems and methods
US8876438B2 (en) * 2010-07-30 2014-11-04 Redi-Rock International, Llc Process for casting concrete wall blocks for use with geogrid
CN102031792B (zh) * 2010-12-22 2013-01-09 杨杰 防倾挡土墙砌块
CN113006130B (zh) 2016-02-08 2023-08-18 坦萨国际公司 分段墙块、土壤增强系统和方法
US10753062B2 (en) * 2017-10-18 2020-08-25 Tetra Tech, Inc. Vertical manhole apparatus and method for providing access to leachate collection pipes in a landfill
CN109518675B (zh) * 2018-10-08 2024-04-30 山东正元冶达环境科技有限公司 一种钢塑土工格栅网连接装置
RU188961U1 (ru) * 2019-02-04 2019-04-30 Андрей Николаевич Путивский Узел соединения полотна георешетки с сеткой габионных конструкций
RU2756651C1 (ru) * 2021-03-10 2021-10-04 Федеральное государственное автономное образовательное учреждение высшего образования «Северный (Арктический) федеральный университет имени М. В. Ломоносова» Коннектор для плоской георешетки
USD1036385S1 (en) * 2021-09-17 2024-07-23 Coilcraft, Incorporated Electronic component
USD1036384S1 (en) 2021-09-17 2024-07-23 Coilcraft, Incorporated Electronic component

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GB2031833B (en) * 1978-10-16 1983-01-12 Plg Res Device for holding a number of containers
GB2199063B (en) * 1986-12-18 1990-09-26 Mccauley Corp Ltd Retaining wall system
US4993879A (en) * 1989-03-08 1991-02-19 Hilfiker William K Connector for securing soil reinforcing elements to retaining wall panels
GB9226143D0 (en) * 1992-12-15 1993-02-10 Martin Christopher Method of connecting geogrids to retaining walls or boundary structures
US5417523A (en) * 1993-10-29 1995-05-23 Scales; John Connector and method for engaging soil-reinforcing grid and earth retaining wall
US5568998A (en) * 1995-02-14 1996-10-29 The Tensar Corporation Precast wall panel and grid connection device
US5647695A (en) * 1995-04-11 1997-07-15 Hilfiker Pipe Company Soil filled wall
US5673530A (en) * 1996-01-25 1997-10-07 The Tensar Corporation Modular block retaining wall system
WO1997044533A1 (en) * 1996-05-21 1997-11-27 Netlon Limited Modular block retaining wall construction
US6113316A (en) * 1997-06-17 2000-09-05 Northern Stresswall Canada Ltd. Retaining wall system
US6827527B2 (en) * 1999-12-20 2004-12-07 The New Castle Group, Inc. Wall components and method
US6457911B1 (en) * 2000-10-25 2002-10-01 Geostar Corporation Blocks and connector for mechanically-stabilized earth retaining wall having soil-reinforcing sheets
US6854231B2 (en) * 2001-07-12 2005-02-15 Keystone Retaining Wall Systems, Inc. Multi-channel retaining wall block and system
US6792731B2 (en) * 2001-10-11 2004-09-21 Timothy A. Bott Reinforcing system for stackable retaining wall units
US6595726B1 (en) * 2002-01-14 2003-07-22 Atlantech International, Inc. Retaining wall system and method of making retaining wall
US7073983B2 (en) * 2003-11-28 2006-07-11 William K. Hilfiker Earthen retaining wall having flat soil reinforcing mats which may be variably spaced
KR20070004036A (ko) * 2004-04-29 2007-01-05 키스톤 리테이닝 월 시스템스, 아이엔씨 벽, 옹벽 및 그 외 유사한 것을 위한 베니어
RU2276230C1 (ru) * 2004-12-08 2006-05-10 Открытое акционерное общество "Научно-исследовательский институт транспортного строительства" (ОАО ЦНИИС) Дорожная насыпь с подпорной стенкой, способ ее сооружения и железобетонный блок для сооружения подпорной стенки
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Also Published As

Publication number Publication date
ATE505592T1 (de) 2011-04-15
EP2016229A1 (en) 2009-01-21
ES2365170T3 (es) 2011-09-23
CA2650620A1 (en) 2007-11-15
RU65515U1 (ru) 2007-08-10
US20090142145A1 (en) 2009-06-04
MX2008014360A (es) 2009-02-03
DE602007013888D1 (de) 2011-05-26
CN101443519A (zh) 2009-05-27
RU2006135860A (ru) 2008-04-20
GB0609204D0 (en) 2006-06-21
RU2353730C2 (ru) 2009-04-27
CN101443519B (zh) 2013-08-14
WO2007128566A1 (en) 2007-11-15
PL2016229T3 (pl) 2011-12-30

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