US20110170950A1 - Monolithic foundation system with homopolymer/ressistannt aggregate pavement with a semi-continuous configuration - Google Patents

Monolithic foundation system with homopolymer/ressistannt aggregate pavement with a semi-continuous configuration Download PDF

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Publication number
US20110170950A1
US20110170950A1 US13/002,560 US200913002560A US2011170950A1 US 20110170950 A1 US20110170950 A1 US 20110170950A1 US 200913002560 A US200913002560 A US 200913002560A US 2011170950 A1 US2011170950 A1 US 2011170950A1
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US
United States
Prior art keywords
foundation
pavement
load transfer
joint
polystyrene 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.)
Abandoned
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US13/002,560
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English (en)
Inventor
Manuel Filipe Ramos Lopes Leonardo
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SCIENTIFIC PAVEMENT WORLD SYSTEMS Lda
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SCIENTIFIC PAVEMENT WORLD SYSTEMS Lda
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Assigned to SCIENTIFIC PAVEMENT WORLD SYSTEMS, LDA reassignment SCIENTIFIC PAVEMENT WORLD SYSTEMS, LDA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOURENCO SERRO, MANUEL FILIPE, RAMOS LOPES LEONARDO, CARLOS MANUEL
Publication of US20110170950A1 publication Critical patent/US20110170950A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations

Definitions

  • This invention relates to a monolithic foundation system with homopolymer/resistant aggregate pavement with a semi-continuous configuration, more specifically to a semi-continuous cement concrete pavement having joints formed by load transfer plates, with a structural strength which, by itself, absorbs, degrades and transmit loads, while withstanding the forces exerted thereon as well as the abrasion caused thereby, without differential settlements on the joint axis, also serving as a wearing course, the said pavement being laid on a foundation which is independent of the natural soil and acting as both a base and a sub-base.
  • rigid pavements also comply with well-established rules.
  • the standards usually considered for determining the pavement characteristics are closely related to aspects such as traffic, loads, sub-bed support and drainage.
  • One of the main problems to be solved is the differential settlements between adjacent concrete slabs in pavements laid on elastic soils.
  • load transfer elements are considered which minimize the loads projected on the foundation and prevent the settlement of the slabs.
  • Another problem to be solved in the design of a rigid cement concrete pavement concerns the sealing of the joints between slabs.
  • the basic function of the sealing of the induction slot in the joints of a concrete pavement is to prevent the intrusion of water and incompressible solid materials, such as sand, small stones and other foreign substances.
  • Water infiltration through the joint has damaging effects on the durability of a pavement, essentially because it is the main cause of pumping, which consists of the deterioration of the foundation layer by expulsion of the grindings of which it is constituted, meaning that the board becomes unprotected and thus subject to degradation (this being known as the pumping phenomenon).
  • an object of the invention is the use of a semi-continuous cement concrete pavement having joints formed by load transfer plates, with a structural strength which, by itself, absorbs, degrades and transmits loads, while withstanding the forces exerted thereon as well as the abrasion caused thereby, without differential settlements on the joint axis, also serving as a wearing course, the said pavement being laid on a foundation which is independent of the natural soil and acting as both a base and a sub-base for supporting the said semi-continuous concrete pavement.
  • the load transfer elements used by the system of the invention are basically the elements of prior art disclosed in Portuguese patent no. 102947, to which improvements have been made so that the use of polystyrene blocks in the foundations is permitted.
  • Patent PT 102947 is herein incorporated for reference purposes.
  • FIG. 1 is a schematic illustration of the system of the invention
  • FIG. 2 is a schematic illustration of an expansion and contraction joint
  • FIG. 3 is a schematic illustration of a construction joint
  • FIG. 4 is another schematic illustration of the system of the invention.
  • FIG. 5 is a perspective view of the load transfer plate of the system of the invention.
  • FIG. 6 is a main elevation of the load transfer plate of the system of the invention.
  • an appropriate foundation Prior to pavement concreting, an appropriate foundation is built to receive the area of the pavement to be concreted, being comprised of several strips, each of them being formed by a sequence of slabs. In turn, the slabs must be confined by a formwork. Finally, the concreting of the slabs is carried out.
  • the foundation ( 1 ) is obtained by the application of high-density expanded polystyrene blocks which, as a homopolymer, remains stable throughout the useful life of the system and, in terms of its technical specifications (density, deformation modulus), has a steady behaviour without modification of the Westergaard modulus: K/cm 3 .
  • the foundation ( 1 ) ensures the carrying capacity of the overall structure and must be designed to that end.
  • the polystyrene blocks having densities and dimensions according to the design are laid over the natural soil ( 2 ). Surface levelling errors should not exceed 5 mm in a 3 m ruler.
  • base and sub-base foundation ( 1 ) used in the system of the invention since it is formed by high-density expanded polystyrene, it has specific technical characteristics which remain unaltered throughout the useful life of this material and which are essentially the following:
  • polystyrene blocks replaces the base and sub-base of conventional foundations. These blocks also provide a formwork which is suitable for a continuous concreting.
  • the level of the formworks will be according to the initial design elevation. Horizontal tolerance will be between 1 and 2 cm in length. The length of the formwork elements is limited in order to allow levelling and layout according to the design elevation.
  • the pavement ( 3 ) After the laying of the foundation ( 1 ) and consequently the formwork, the pavement ( 3 ) can be concreted according to the established work specification.
  • the concreting process comprises the following steps:
  • the layout of the longitudinal profile will be realized on site with the aid of topographic precision instruments.
  • the prescribed levels are verified by stakes placed solidly in the ground, outside the concreting corridor, at maximum intervals of 50 m, so that a rigorous longitudinal profile is formed parallel to the final elevation of the slab to be executed. In the case of curves, the distance between the stakes is reduced in order to exactly follow the profile of the design.
  • the placing of the stakes must be carried out at least one day before the concreting operation. Unless there is a local impediment, to be recognized by the inspection authority, the preparation of the joints and the placement of the load transfer plates should precede the concreting by a distance of around 50 m, in order to ensure continuous implementation.
  • the foundation In order to prevent any water absorption from the concrete to the foundation ( 1 ), the foundation should be always covered with a sliding complex of approximately 0.2 mm and coverings of 20 cm.
  • composition of the concrete will be sent to the inspection authority to be approved thereby. It must be in compliance with the pre-established conditions for each specific project.
  • Manufacturing will preferably take place at the construction site and the equipment will have sufficient capacity to ensure a continuous laying operation.
  • the type of transport will be subject to approval by the inspection authority, whether in a cement truck mixer or in a dump truck.
  • the concrete may be laid and hand vibrated with a vibrating needle.
  • All the edges of the slabs along the formworks will have to be vibrated using a needle vibrator.
  • the surface treatment of the coating will be made by brushing the fresh concrete with brushes previously approved by the inspection authority.
  • Contraction and expansion joints are according to FIG. 2 .
  • the sawing depth is of at least 2 cm.
  • the construction joints are established at the end of each daily production or in the case of interruption of the concreting operation. As can be observed, the face of the joint must be flat and perpendicular to the surface of the coating. As soon as the concreting operation is restarted, the said joints are placed concrete against concrete, the face of the preceding slab being bathed with an anti-adherent agent, such as Antisol, in order to provide an effective separation.
  • an anti-adherent agent such as Antisol
  • the pavement generically illustrated as ( 3 ) is formed by several slabs ( 4 ) which are provided with load transfer plates ( 5 ).
  • the said plates ( 5 ) are comprised of two anchors ( 6 ) with two rebars ( 7 ) for alignment of a joint inductor ( 8 ), and a ball joint ( 9 ) which, at the load support moment, rotates anticlockwise and, at the support moment generated by the load transfer plates ( 5 ), performs a clockwise movement.
  • This ball joint ( 9 ) is positioned under the joint inductor ( 8 ) and its centre is aligned with the vertical axis of the joint formed by the said inductor ( 8 ).
  • the said ball joint ( 9 ) releases the concrete slabs ( 4 ) from stress caused by bending/traction at the moment of load transfer, allowing the foundation ( 1 ) to be unaffected by bending moments resulting from the load and thus making the slab ( 4 ) work essentially with compression stress, thereby ensuring a safety coefficient much higher than the normal one and a long life of the foundation ( 1 ) of the slab ( 4 ).
  • the ball joint ( 9 ) releasing the concrete slabs ( 4 ) from stress caused by bending/traction at the moment of load transfer will thus allow the said concrete slabs ( 4 ) to work for a longer period of time with compression, i.e. releasing them from permanent stress and filtering most of the vibrations caused by rolling loads.
  • the said slabs ( 4 ) will be subject to:
  • this invention relates to a pavement ( 3 ) which has been successfully tested in all kinds of adverse conditions, having now a new conception of supports for joints, which consists of providing the load transfer plates ( 5 ) with ball joints ( 9 ) which, as previously mentioned, release the concrete slabs ( 4 ) from stress caused by bending/traction at the moment of load transfer, allowing the foundation ( 1 ) to remain unaffected by bending moments resulting from the load and thus making the slab ( 4 ) work essentially with compression stress.
  • Joint sealing is required for protecting the foundation ( 1 ) against chemical agents/diluents. This sealing is guaranteed by placement of the joint inductor ( 8 ), which has a certain slope for water (liquid) runoff, together with the use of a silicone-type insulating material (with two components) injected on the joint over the inductor ( 8 ) in order to provide complete insulation.
  • the foundation ( 1 ) must be coated along its upper and lateral parts with a plastic material. This material allows a reduction from about 2.5 to 0.5 in the friction coefficient of the slab ( 4 ) concrete when contracting and it also insulates the polystyrene blocks against any chemical attack resulting from spillages on the pavement surface ( 3 ).

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Foundations (AREA)
  • Building Environments (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
US13/002,560 2008-07-04 2009-07-03 Monolithic foundation system with homopolymer/ressistannt aggregate pavement with a semi-continuous configuration Abandoned US20110170950A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PTPT104125 2008-07-04
PT104125A PT104125B (pt) 2008-07-04 2008-07-04 Sistema monolítico de fundação em homopolímero/pavimento em agregados resistentes em configuração semi-contínua
PCT/PT2009/000039 WO2010002285A2 (en) 2008-07-04 2009-07-03 Monolithic foundation system with homopolymer/resistan aggregate pavement with a semi -continuous configuration

Publications (1)

Publication Number Publication Date
US20110170950A1 true US20110170950A1 (en) 2011-07-14

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US13/002,560 Abandoned US20110170950A1 (en) 2008-07-04 2009-07-03 Monolithic foundation system with homopolymer/ressistannt aggregate pavement with a semi-continuous configuration

Country Status (18)

Country Link
US (1) US20110170950A1 (es)
EP (1) EP2356287B1 (es)
JP (1) JP2012503112A (es)
KR (1) KR20110038669A (es)
CN (1) CN102388189B (es)
AU (1) AU2009266512A1 (es)
BR (1) BRPI0915370B1 (es)
CA (1) CA2729779A1 (es)
CL (1) CL2011000003A1 (es)
CO (1) CO6341497A2 (es)
EC (1) ECSP11010799A (es)
IL (1) IL210422A (es)
MA (1) MA32430B1 (es)
PE (1) PE20110234A1 (es)
PT (2) PT104125B (es)
RU (1) RU2509841C2 (es)
UA (1) UA101505C2 (es)
WO (1) WO2010002285A2 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108642986A (zh) * 2018-07-25 2018-10-12 辽宁工程技术大学 一种控制半堤半堑路基不均匀沉降的锚索结构和施工方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10352004B2 (en) * 2014-05-28 2019-07-16 MOREIRA SERRO, Afonso Load transmission device

Citations (21)

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US1874589A (en) * 1929-06-07 1932-08-30 Older Clifford Joint for pavements or the like
US2045089A (en) * 1933-08-30 1936-06-23 Charles E Kyte Expansion joint
US2093718A (en) * 1935-12-04 1937-09-21 Fremont Wynne Oscar Joint construction
US2108393A (en) * 1935-07-01 1938-02-15 Truscon Steel Co Dowel means for roadway expansion joints
US2125857A (en) * 1934-06-02 1938-08-02 Albert C Fischer Paving and expansion joint structure
US2201824A (en) * 1938-01-15 1940-05-21 American Steel & Wire Co Pavement joint
US2355771A (en) * 1939-11-27 1944-08-15 Texas Foundries Inc Load transfer device and tie bar
US2482836A (en) * 1945-09-28 1949-09-27 American Steel & Wire Co Transload device
US2509663A (en) * 1945-03-28 1950-05-30 Texas Foundries Inc Load transfer device
US3194350A (en) * 1963-05-21 1965-07-13 Kelsey Hayes Co Automatic adjuster for disk brakes
US3403754A (en) * 1967-04-27 1968-10-01 Int Harvester Co Brake return and automatic adjustment means
US4648739A (en) * 1985-03-20 1987-03-10 Thomsen Bernard D Load transfer cell assembly for concrete pavement transverse joints
US4784516A (en) * 1988-02-10 1988-11-15 Harco Research, Inc. Traffic bearing expansion joint cover and method of preparing same
US5366319A (en) * 1993-02-04 1994-11-22 Kansas State University Research Foundation Expansion joint assembly having load transfer capacity
US6146054A (en) * 1996-04-18 2000-11-14 Screg Lightweight embankment
US6367591B1 (en) * 1999-12-21 2002-04-09 Caterpillar Inc. Automatic brake clearance adjuster
US6460214B1 (en) * 2001-03-27 2002-10-08 Ming-Huang Chang Vibration resistive instant responding roadway or bridge expansion joint and construction method of the same
US20050036835A1 (en) * 2003-08-13 2005-02-17 Shaw Lee A. Disk plate concrete dowel system
US20060013653A1 (en) * 2004-07-19 2006-01-19 Bend Industries, Inc. Method for installing paving blocks
US7806624B2 (en) * 2000-09-29 2010-10-05 Tripstop Technologies Pty Ltd Pavement joint
US8206059B1 (en) * 2011-09-14 2012-06-26 Southgate Herbert F Load transfer assembly

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JPS60178006U (ja) * 1984-04-28 1985-11-26 澤田　三郎 コンクリ−ト構造物用スリツプバ−
SU1414913A1 (ru) * 1987-01-21 1988-08-07 А.В.Ярмолинска , О.М.Табачник и М.Ю.Барбанель Шов дорожного или аэродромного покрыти
JPH0452274Y2 (es) * 1987-05-21 1992-12-09
JPH01105602U (es) * 1988-01-08 1989-07-17
RU2164976C1 (ru) * 1999-08-23 2001-04-10 Открытое акционерное общество "Научно-исследовательский институт транспортного строительства (ЦНИИС)" Деформационный шов проезжей части моста
JP2001207401A (ja) * 2000-01-21 2001-08-03 Taisei Corp 立体交差の構築方法
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JP4192255B2 (ja) * 2003-07-23 2008-12-10 株式会社カネカ 拡幅盛土構造
GB0325813D0 (en) * 2003-11-05 2003-12-10 Winter William Sacrificial shutter
JP4506316B2 (ja) * 2004-07-13 2010-07-21 ナラサキ産業株式会社 道路の段差解消構造
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JP4528266B2 (ja) * 2006-02-03 2010-08-18 ダウ化工株式会社 軽量片盛土構造
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Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1874589A (en) * 1929-06-07 1932-08-30 Older Clifford Joint for pavements or the like
US2045089A (en) * 1933-08-30 1936-06-23 Charles E Kyte Expansion joint
US2125857A (en) * 1934-06-02 1938-08-02 Albert C Fischer Paving and expansion joint structure
US2108393A (en) * 1935-07-01 1938-02-15 Truscon Steel Co Dowel means for roadway expansion joints
US2093718A (en) * 1935-12-04 1937-09-21 Fremont Wynne Oscar Joint construction
US2201824A (en) * 1938-01-15 1940-05-21 American Steel & Wire Co Pavement joint
US2355771A (en) * 1939-11-27 1944-08-15 Texas Foundries Inc Load transfer device and tie bar
US2509663A (en) * 1945-03-28 1950-05-30 Texas Foundries Inc Load transfer device
US2482836A (en) * 1945-09-28 1949-09-27 American Steel & Wire Co Transload device
US3194350A (en) * 1963-05-21 1965-07-13 Kelsey Hayes Co Automatic adjuster for disk brakes
US3403754A (en) * 1967-04-27 1968-10-01 Int Harvester Co Brake return and automatic adjustment means
US4648739A (en) * 1985-03-20 1987-03-10 Thomsen Bernard D Load transfer cell assembly for concrete pavement transverse joints
US4784516A (en) * 1988-02-10 1988-11-15 Harco Research, Inc. Traffic bearing expansion joint cover and method of preparing same
US5366319A (en) * 1993-02-04 1994-11-22 Kansas State University Research Foundation Expansion joint assembly having load transfer capacity
US6146054A (en) * 1996-04-18 2000-11-14 Screg Lightweight embankment
US6367591B1 (en) * 1999-12-21 2002-04-09 Caterpillar Inc. Automatic brake clearance adjuster
US7806624B2 (en) * 2000-09-29 2010-10-05 Tripstop Technologies Pty Ltd Pavement joint
US6460214B1 (en) * 2001-03-27 2002-10-08 Ming-Huang Chang Vibration resistive instant responding roadway or bridge expansion joint and construction method of the same
US20050036835A1 (en) * 2003-08-13 2005-02-17 Shaw Lee A. Disk plate concrete dowel system
US20060013653A1 (en) * 2004-07-19 2006-01-19 Bend Industries, Inc. Method for installing paving blocks
US7244076B2 (en) * 2004-07-19 2007-07-17 Bend Industries, Inc. Method for installing paving blocks
US8206059B1 (en) * 2011-09-14 2012-06-26 Southgate Herbert F Load transfer assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108642986A (zh) * 2018-07-25 2018-10-12 辽宁工程技术大学 一种控制半堤半堑路基不均匀沉降的锚索结构和施工方法

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BRPI0915370A2 (pt) 2015-11-03
PE20110234A1 (es) 2011-04-11
IL210422A0 (en) 2011-03-31
AU2009266512A1 (en) 2010-01-07
JP2012503112A (ja) 2012-02-02
PT104125A (pt) 2010-01-04
CA2729779A1 (en) 2010-01-07
CN102388189B (zh) 2014-08-06
WO2010002285A3 (en) 2012-03-08
KR20110038669A (ko) 2011-04-14
BRPI0915370B1 (pt) 2018-11-21
MA32430B1 (fr) 2011-06-01
PT2356287E (pt) 2015-10-14
EP2356287B1 (en) 2015-06-03
PT104125B (pt) 2010-05-28
CL2011000003A1 (es) 2011-09-16
CO6341497A2 (es) 2011-11-21
RU2509841C2 (ru) 2014-03-20
WO2010002285A2 (en) 2010-01-07
UA101505C2 (ru) 2013-04-10
CN102388189A (zh) 2012-03-21
EP2356287A2 (en) 2011-08-17
ECSP11010799A (es) 2011-07-29
IL210422A (en) 2013-11-28
RU2010154175A (ru) 2012-08-10

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AS Assignment

Owner name: SCIENTIFIC PAVEMENT WORLD SYSTEMS, LDA, PORTUGAL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LOURENCO SERRO, MANUEL FILIPE;RAMOS LOPES LEONARDO, CARLOS MANUEL;REEL/FRAME:026131/0049

Effective date: 20101230

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION