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1. WO2009055389 - METHOD AND APPARATUS FOR BUILDING SUPPORT PIERS FROM ONE OR MORE SUCCESSIVE LIFTS FORMED IN A SOIL MATRIX

Publication Number WO/2009/055389
Publication Date 30.04.2009
International Application No. PCT/US2008/080644
International Filing Date 21.10.2008
IPC
E02D 3/12 2006.01
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
3Improving or preserving soil or rock, e.g. preserving permafrost soil
12Consolidating by placing solidifying or pore-filling substances in the soil
E02D 5/46 2006.01
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
5Bulkheads, piles, or other structural elements specially adapted to foundation engineering
22Piles
34Concrete or concrete-like piles cast in position
46making in situ by forcing bonding agents into gravel fillings or the soil
CPC
E02D 3/08
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS
3Improving or preserving soil or rock, e.g. preserving permafrost soil
02Improving by compacting
08by inserting stones or lost bodies, e.g. compaction piles
E02D 5/44
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS
5Bulkheads, piles, or other structural elements specially adapted to foundation engineering
22Piles
34Concrete or concrete-like piles cast in position ; ; Apparatus for making same
38making by use of mould-pipes or other moulds
44with enlarged footing or enlargements at the bottom of the pile
Applicants
  • GEOPIER FOUNDATION COMPANY, INC. [US]/[US] (AllExceptUS)
  • FOX, Nathaniel S. [US]/[US] (UsOnly)
  • WEPPLER, Lorenz [US]/[DE] (UsOnly)
Inventors
  • FOX, Nathaniel S.
  • WEPPLER, Lorenz
Agents
  • E. ERIC MILLS
Priority Data
11/876,55622.10.2007US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR BUILDING SUPPORT PIERS FROM ONE OR MORE SUCCESSIVE LIFTS FORMED IN A SOIL MATRIX
(FR) PROCÉDÉ ET APPAREIL POUR CONSTRUIRE PILIERS DE SUPPORT À PARTIR D'UN OU DE PLUSIEURS LEVAGES SUCCESSIFS FORMÉS DANS UNE MATRICE DE SOL
Abstract
(EN)
A method and apparatus for forming a support aggregate pier having compacted aggregate lifts in a soil matrix, includes an elongate, hollow tube with a bulbous leading end bottom head element that is forced or lowered into the soil matrix. The hollow tube includes a mechanism for releasing aggregate from the lower head element of the tube as the tube is lifted in predetermined increments. The same hollow tube is then lowered or pushed in predetermined increments to vertically compact the released aggregate in thin aggregate lifts, while forcing a portion of the compacted aggregate transaxially into the soil matrix at the sidewalls of the cavity. The process may be repeated to form a series of compacted aggregate lifts comprising an aggregate pier or the process may include forming only a single lift for the aggregate pier while densifying adjacent matrix soils and imparting lateral stress in these soils.
(FR)
La présente invention concerne un procédé et un appareil pour former un pilier d'agrégat de support qui possède des levages d'agrégat compacté dans une matrice de sol, qui comprennent un tube creux oblong avec un élément tête inférieur d'extrémité avant bulbeux qui est formé ou abaissé dans la matrice de sol. Le tube creux comprend un mécanisme pour libérer l'agrégat de l'élément tête inférieur du tube lorsque le tube est levé selon des incréments prédéterminés. Le même tube creux est alors abaissé ou poussé selon des incréments prédéterminés pour compacter verticalement l'agrégat libéré dans des levages d'agrégat minces, tout en forçant une partie de l'agrégat compacté de façon transaxiale dans la matrice du sol sur les parois latérales de la cavité. Le procédé peut être répété pour former une série de levages d'agrégat compacté qui comprennent un pilier d'agrégat ou le procédé peut consister à former seulement un levage unique pour le pilier d'agrégat tout en densifiant des sols de matrice adjacents et en transmettant une contrainte latérale dans ces sols.
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