EP1123447A1 - Structure de fondation situee sur un sol faiblement resistant - Google Patents

Structure de fondation situee sur un sol faiblement resistant

Info

Publication number
EP1123447A1
EP1123447A1 EP99953763A EP99953763A EP1123447A1 EP 1123447 A1 EP1123447 A1 EP 1123447A1 EP 99953763 A EP99953763 A EP 99953763A EP 99953763 A EP99953763 A EP 99953763A EP 1123447 A1 EP1123447 A1 EP 1123447A1
Authority
EP
European Patent Office
Prior art keywords
caps
reinforcement
columns
foundation structure
structure according
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.)
Granted
Application number
EP99953763A
Other languages
German (de)
English (en)
Other versions
EP1123447B1 (fr
Inventor
Dimiter Alexiew
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.)
Huesker Synthetic GmbH and Co
Original Assignee
Huesker Synthetic GmbH and Co
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 Huesker Synthetic GmbH and Co filed Critical Huesker Synthetic GmbH and Co
Publication of EP1123447A1 publication Critical patent/EP1123447A1/fr
Application granted granted Critical
Publication of EP1123447B1 publication Critical patent/EP1123447B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/36—Foundations formed in moors or bogs
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00—General structure of permanent way
    • E01B2/006—Deep foundation of tracks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E02D27/14—Pile framings, i.e. piles assembled to form the substructure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
    • E01B1/001—Track with ballast
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/08—Deep or vertical foundation

Definitions

  • the invention relates to a foundation structure on a low load-bearing building ground, in which columns are arranged at regular intervals for the transmission of loads in the low-lying, load-bearing building ground, which tower above the low-loadable building ground and a geosynthetic reinforcement is laid over the heads of the columns that is burdened with a fill.
  • a flat, essentially horizontal geosynthetic reinforcement is laid over the heads of the columns or piles.
  • the columns or foundation piles can be concrete columns or mortar columns, darning columns, ballast columns or the like. It is also known to arrange so-called head plates on the columns in order to reduce the clear span of the geosynthetic reinforcement.
  • the full-surface and level or flat geo-plastic reinforcement is so heavily loaded during the expansion of the foundation structure and the compaction of the fill that it sags between the pillars or the head plates, giving in to the low load-bearing ground.
  • the forces acting on the geoplastic reinforcement are converted into large tensile forces in the reinforcement, which cause the geoplastic reinforcement to expand.
  • An equilibrium state arises as a result of the interaction of load, elongation, sag, tensile force or membrane load-bearing capacity and any counterpressure of the subsoil.
  • the invention has for its object to provide a foundation structure in which the resilience of the geosynthetic reinforcement is increased under the same general conditions or the reinforcement acts more efficiently.
  • the object underlying the invention can also be achieved in that an arched bar is placed on at least two columns arranged at regular intervals and in parallel rows, the thickness of which decreases steadily from the center line to the two edges of the bar and that a flexible geosynthetic reinforcement is laid at a distance from each other around bars arranged parallel to one another so that it follows the bulges in the area of the bars and the troughs between the bars.
  • the domed caps or the arched bars the underside of which is approximately at the level of the low-load building ground, result in troughs or valleys between the caps or bars, into which the flexible geosynthetic reinforcement lies.
  • the domed caps or bars have a maximum height of 15 to 50 cm above their underside.
  • the prefabricated caps or bars can preferably consist of concrete, reinforced concrete, plastic or cast iron.
  • the caps or bolts can also be designed as a sheet steel-concrete composite body, with a curved steel sheet cap or a curved steel sheet shell serving as a molded wall for the concrete to be filled.
  • the steel sheet spherical caps and the steel sheet shells are provided with punchings, welds, embossings or the like which protrude into the cavity to be filled with concrete, in order to ensure a reliable bond with the concrete to be filled.
  • the caps can also be formed from high-strength, closed textile casings, which are preferably filled with sand or concrete and thereby obtain their curved shape.
  • the flexible, flexible geosynthetic reinforcement can be applied in the form of mats or strips.
  • the geomats can be woven over the entire surface or as a grid or as a layer of thread rustled onto a fleece.
  • the Geosynthetic reinforcement can consist of only one geomat, provided that the load-bearing threads are biaxially oriented. However, if the reinforcement mat is only provided with unidirectional load-bearing threads, the geosynthetic reinforcement consists of at least two mats that are laid so that their load-bearing threads are perpendicular to each other.
  • the reinforcement mats can be installed with or without an intermediate floor layer.
  • FIG. 1 is a sectional view of a foundation structure according to the invention, 2 the upper end of a column with a cap attached, FIG. 3 diagrammatic view of a cap which is round in plan.
  • Fig. 4 perspective view of a square cap in plan
  • Fig. 5 perspective view of an arched latch
  • FIG. 6 a diagrammatic view of a geosynthetic reinforcement mat with orthogonally extending, load-bearing threads in the state laid over the domed caps
  • FIG. 7 a view corresponding to FIG. 6 of two geosynthetic reinforcement mats with load-bearing threads running in only one direction in the state laid over the domed caps
  • Fig. 8 is a view along the section line VIII-VIII in Fig. 7, Fig. 9 a the Fig. 6 and 7 corresponding view of geoplastic reinforcement tapes laid over the domed caps
  • FIG. 10 perspective view of a cushion-like domed cap, which consists of a textile shell filled with sand or concrete.
  • FIG. 1 shows a sectional view of a foundation structure for a railway line, which is led over a building ground 1 which is not or only slightly load-bearing.
  • building ground 1 which is not or only slightly load-bearing.
  • foundation piles or columns 3 are arranged at regular intervals, which support the low-loadable building ground 1 with their Towering over heads.
  • a geoplastic reinforcement 5 is laid over the heads of the columns 3 and is loaded with a fill 6.
  • the heads of the columns 3 are formed by curved caps 4, the cross-sectional area of which extends beyond the cross-sectional area of the columns 3 on all sides and the thickness of which continuously decreases from their center towards the edge.
  • FIG. 2 shows a cap 4 placed on a column 3, which on its underside has a downwardly widening conical recess 9, into which an upwardly tapering projection of the support 3 projects.
  • the height of the caps 4 from the bottom to the summit is essentially dependent on the distance between the columns 3 and can be 15 to 50 cm.
  • the domed cap 4 can be circular or square in plan view. In any case, the curved cap 4 is designed so that no wrinkles and no major changes in direction arise when laying the geosynthetic reinforcement 5.
  • arched caps 4, 4 ', 4 " it may be advantageous to provide arched bars 14 which are placed on at least two columns 3.
  • the columns 3 are advantageously arranged in parallel rows, so that the arched bars 14 are transverse or longitudinal run to the traffic route and the geoplastic reinforcement 5 runs in the other direction in a wave shape.
  • the arched caps 4, 4 ', 4 "and the arched bolts 14 can in particular consist of concrete or reinforced concrete.
  • the arched caps 4, 4 ', 4 " can also be made of plastic or cast iron.
  • a further embodiment of the caps 4, 4', 4" or bars 14 can consist in that they are composed of a curved sheet metal dome or sheet metal shell which is connected to a hardening material like concrete is poured out.
  • the curved sheet metal dome or sheet metal shell serves as a molded wall. On this mold wall, inwardly projecting punchings, impressions or welded-on tabs or the like can be attached, which bring about a reliable bond between the sheet metal cap or sheet metal shell and the hardening material.
  • FIG. 7 and 8 show a geoplastic reinforcement 5 laid over curved caps 4, which is composed of two reinforcement mats 8 and 8 ', the load-bearing threads 10 of which run in only one direction.
  • the two reinforcement mats 8, 8 ' are laid with or without an intermediate layer of sand or soil in such a way that their load-bearing threads 10 run at right angles to one another.
  • Fig. 9 shows that part of the geosynthetic reinforcement can also consist of heavy-duty reinforcement bands 11, 12.
  • These reinforcement bands 11, 12 have the advantage that the reinforcement can be better adapted to the requirements and, for example, the strength of the reinforcement can be made larger in one direction than in the direction perpendicular to it.
  • a full-surface geosynthetic mat can be laid over these reinforcement bands 11, 12, the load capacity of which is reduced and only serves to distribute the load on the reinforcement bands.
  • the foundation piles or columns 3 are usually arranged in a square grid. In some cases, however, a triangular arrangement of the columns 3 is more advantageous. In such cases, the geosynthetic reinforcement 5 must also be designed triaxially. With the help of reinforcement bands 11, 12, the An efficient tensile geosynthetic reinforcement is possible via the domed caps 4 of the triaxially arranged columns 3.
  • the arched cap 4 ′′ is formed by a cushion-like cover 13 filled with sand or concrete.
  • This textile cover 13 is a double fabric made of plastic threads, in which the two fabric layers are woven together on four edge strips 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Foundations (AREA)
  • Building Environments (AREA)

Abstract

Structure de fondation située sur un sol (1) faiblement résistant, qui comporte des colonnes (3) placées dans le sol résistant plus profond et destinées au transfert des charges, les têtes desdites colonnes dépassant de la couche de sol (1) faiblement résistant, ainsi qu'une armature (5) en matériau géosynthétique qui est chargée de matière de remblais (6). Pour que l'armature puisse supporter un poids plus élevé et régulièrement réparti, les têtes des colonnes (3) sont constituées de calottes voûtées (4) dont la superficie dépasse de tous les côtés la superficie de la section des colonnes et dont l'épaisseur décroît progressivement du milieu vers le bord. L'armature (5) souple en matériau géosynthétique est installée sur ces calottes de manière telle qu'elle épouse les bosses formées par les calottes (4) et les dépressions situées entre lesdites calottes (4).
EP99953763A 1998-10-22 1999-10-09 Structure de fondation situee sur un sol faiblement resistant Expired - Lifetime EP1123447B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19848846A DE19848846A1 (de) 1998-10-22 1998-10-22 Gründungsbauwerk auf gering tragfähigem Grund
DE19848846 1998-10-22
PCT/EP1999/007584 WO2000024973A1 (fr) 1998-10-22 1999-10-09 Structure de fondation situee sur un sol faiblement resistant

Publications (2)

Publication Number Publication Date
EP1123447A1 true EP1123447A1 (fr) 2001-08-16
EP1123447B1 EP1123447B1 (fr) 2002-06-12

Family

ID=7885364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99953763A Expired - Lifetime EP1123447B1 (fr) 1998-10-22 1999-10-09 Structure de fondation situee sur un sol faiblement resistant

Country Status (5)

Country Link
EP (1) EP1123447B1 (fr)
AU (1) AU1034400A (fr)
DE (2) DE19848846A1 (fr)
ES (1) ES2178486T3 (fr)
WO (1) WO2000024973A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2493731A (en) * 2011-08-16 2013-02-20 Aspins Foundations Ltd Railway Track Support System
EP3049571B1 (fr) * 2013-09-05 2020-10-21 Geopier Foundation Company, Inc. Système et procédé pour stabiliser des structures de voie ferrée à l'aide d'un appareil de transfert de charge

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20216387U1 (de) 2002-10-24 2002-12-19 Grötz, Georg, 76597 Loffenau Gleisanlage für schienengebundene Fahrzeuge
DE10333613B4 (de) * 2003-07-24 2011-06-30 Keller Grundbau GmbH, 63067 Verbesserung einer Weichschicht
CN102102362A (zh) * 2011-03-09 2011-06-22 夏力农 一种直接加固软弱下卧土层地基的方法
CN106638168A (zh) * 2017-01-17 2017-05-10 马鞍山钢铁股份有限公司 加固注浆整治冶金铁路路基病害装置及施工方法
IT201800004163A1 (it) * 2018-04-03 2019-10-03 Metodo di stabilizzazione, per alleggerimento, di un rilevato ferroviario o stradale
CN110777569A (zh) * 2019-10-09 2020-02-11 中铁第四勘察设计院集团有限公司 膨胀土有限变形防上拱的地基结构和地基结构的施工方法
WO2022094728A1 (fr) * 2020-11-09 2022-05-12 Tbt Engineering Limited Système de drain résistant au cisaillement pour améliorer les sols de fondation faibles
CN114908618B (zh) * 2022-05-11 2023-06-20 中南大学 一种铁路基翻浆冒泥病害治理的施工装置及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938429A (ja) * 1982-07-26 1984-03-02 Hasegawa Komuten Co Ltd 埋設コンクリ−ト杭の杭頭処理工法
JP2679235B2 (ja) * 1989-04-07 1997-11-19 東洋紡績株式会社 軟弱地盤埋立工法
JPH0565716A (ja) * 1991-09-06 1993-03-19 Asahi Chem Ind Co Ltd 鋼杭基礎
DE4407747C2 (de) * 1994-03-08 1996-04-04 Porr Technobau Ag Gleis für den schienengeleiteten Verkehr sowie Verfahren zum Ertüchtigen von Gleisen
JPH08218391A (ja) * 1995-02-15 1996-08-27 Kajima Corp レベル調整可能な土間スラブ工法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0024973A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2493731A (en) * 2011-08-16 2013-02-20 Aspins Foundations Ltd Railway Track Support System
EP3049571B1 (fr) * 2013-09-05 2020-10-21 Geopier Foundation Company, Inc. Système et procédé pour stabiliser des structures de voie ferrée à l'aide d'un appareil de transfert de charge

Also Published As

Publication number Publication date
DE19848846A1 (de) 2000-04-27
WO2000024973A1 (fr) 2000-05-04
DE59901767D1 (de) 2002-07-18
ES2178486T3 (es) 2002-12-16
AU1034400A (en) 2000-05-15
EP1123447B1 (fr) 2002-06-12

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