FR2827887A1 - Micro-pile for building repair has larger diameter point and hydraulic drive to push into soil - Google Patents
Micro-pile for building repair has larger diameter point and hydraulic drive to push into soil Download PDFInfo
- Publication number
- FR2827887A1 FR2827887A1 FR0110049A FR0110049A FR2827887A1 FR 2827887 A1 FR2827887 A1 FR 2827887A1 FR 0110049 A FR0110049 A FR 0110049A FR 0110049 A FR0110049 A FR 0110049A FR 2827887 A1 FR2827887 A1 FR 2827887A1
- Authority
- FR
- France
- Prior art keywords
- micro
- pile
- soil
- larger diameter
- foundation
- 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
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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
- E02D27/48—Foundations inserted underneath existing buildings or constructions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
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- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Piles And Underground Anchors (AREA)
Abstract
Description
<Desc/Clms Page number 1> <Desc / Clms Page number 1>
La présente invention concerne un dispositif pour réaliser des micro-pieux afin de reprendre les fondations d'une structure existante. The present invention relates to a device for producing micro-piles in order to take up the foundations of an existing structure.
La réalisation de micro-pieux est traditionnellement effectuée à l'aide d'une machine de forage, qui permet de réaliser un trou cylindrique de faible diamètre et de plusieurs mètres de long dans le sol, dans lequel est disposée une armature, scellée d'une part dans le sol par un coulis de ciment, d'autre part dans la fondation de la structure à reprendre par des mortiers spéciaux. The making of micro-piles is traditionally carried out using a drilling machine, which makes it possible to produce a cylindrical hole of small diameter and several meters long in the ground, in which is placed a reinforcement, sealed with on the one hand in the ground by a cement grout, on the other hand in the foundation of the structure to be taken up by special mortars.
La réalisation du forage engendre des nuisances importantes pour l'environnement et les occupants de la structure à reprendre, notamment en termes de bruit (compresseur alimentant la machine, outils de forage), vibrations, de poussière ou de boue de forage. The completion of drilling generates significant nuisances for the environment and the occupants of the structure to be resumed, in particular in terms of noise (compressor powering the machine, drilling tools), vibrations, dust or drilling mud.
De plus, les capacités portantes des micro-pieux dépendent essentiellement de la qualité d'exécution du forage (risque de remaniement du terrain d'ancrage), et ne peuvent être testées qu'une fois le pieu exécuté. In addition, the bearing capacities of the micro-piles essentially depend on the quality of execution of the drilling (risk of reworking of the anchoring ground), and can only be tested once the pile has been executed.
Enfin les machines de forage ont des dimensions incompressibles, ce qui les empêchent, sauf terrassements importants, d'accéder dans les vides sanitaires de hauteurs inférieures à 1,5m. Finally, the drilling machines have incompressible dimensions, which prevent them, unless major earthworks, from entering the crawl spaces of heights less than 1.5m.
Le dispositif selon l'invention permet de foncer dans le sol par poussée hydraulique l'armature composant le micro-pieu. Cette armature est équipée d'une pointe d'un diamètre plus large que le sien propre, impliquant une réaction du terrain en cours de fonçage limitée à l'unique effort de pointe. The device according to the invention makes it possible to sink into the ground by hydraulic thrust the frame making up the micro-pile. This frame is equipped with a tip with a diameter larger than its own, implying a reaction of the ground during sinking limited to the single tip effort.
Le dispositif selon l'invention présente plusieurs avantages sur les machines de forages traditionnelles ; il permet de : - mettre l'armature en place dans le sol sans les nuisances décrites plus haut, soit sans bruit, sans vibrations, sans poussière ni boue ; éviter toute extraction de terrain ; - récupérer des données pénétrométriques des sols traversés au droit de chaque appui lors de l'exécution du micro-pieu ; - mobiliser, uniquement après injection du coulis, l'effort latéral, ce qui augmente considérablement la portance ; - vérifier in situ et en vraie grandeur la capacité portante de chaque appui ; - appliquer sur chaque micro-pieu la charge qu'il doit reprendre (mise en charge du micro-pieu) ; - équilibrer les charges entre les différents micro-pieux ; - vérifier le comportement et les réactions aux charges des éléments de la structure The device according to the invention has several advantages over traditional drilling machines; it allows: - to put the frame in place in the ground without the nuisance described above, ie without noise, without vibrations, without dust or mud; avoid any land extraction; - recover penetrometric data of the soils crossed to the right of each support during the execution of the micro-pile; - mobilize, only after injection of the grout, the lateral force, which considerably increases the lift; - check in situ and at full size the bearing capacity of each support; - apply the load to each micro-pile to be taken up (loading the micro-pile); - balance the loads between the different micro-piles; - check the behavior and the reactions to the loads of the elements of the structure
<Desc/Clms Page number 2><Desc / Clms Page number 2>
reprise ; réaliser des micro-pieux dans des endroits inaccessibles aux machines traditionnelles, grâce à son faible encombrement. reprise ; realize micro-piles in places inaccessible to traditional machines, thanks to its small footprint.
Le dispositif selon l'invention est composé d'une armature d'un diamètre donné, équipé d'une pointe d'un diamètre supérieur à celui de l'armature, foncée dans le sol par poussée hydraulique en prenant appui sous la fondation. The device according to the invention is composed of an armature of a given diameter, equipped with a tip of a diameter greater than that of the armature, dark in the ground by hydraulic thrust taking support under the foundation.
Une variante de ce dispositif est une armature d'un diamètre donné, équipée d'une pointe d'un diamètre supérieur à celui de l'armature, foncée dans le sol par poussée hydraulique en prenant appui sur les fondations, carottées sur leur hauteur au droit du micro-pieu, par l'intermédiaire d'un cadre ancré dans les fondations. A variant of this device is an armature of a given diameter, equipped with a point with a diameter greater than that of the armature, dark in the ground by hydraulic thrust bearing on the foundations, cored on their height at right of the micro-stake, through a frame anchored in the foundations.
Une fois le fonçage terminé, l'injection du coulis de ciment et le scellement de la tête du micro-pieu dans la fondation se font de la même façon que pour les micro-pieux traditionnels. Once the sinking is complete, the injection of the cement grout and the sealing of the head of the micro-pile in the foundation is done in the same way as for traditional micro-piles.
La figure 1 annexée illustre le dispositif selon l'invention, la figure 2 sa variante, avec lec repères 1 à 6 comme suit : - fondation de la structure à reprendre (1) armature du micro-pieu (2) - pointe équipant l'armature du micro-pieu (3) - système appliquant la poussée hydraulique (4) - cadre intermédiaire ancré dans les fondations (5) - carottage de la fondation existante (6). Figure 1 attached illustrates the device according to the invention, Figure 2 its variant, with marks 1 to 6 as follows: - foundation of the structure to be taken up (1) reinforcement of the micro-pile (2) - tip equipping the reinforcement of the micro-pile (3) - system applying the hydraulic thrust (4) - intermediate frame anchored in the foundations (5) - coring of the existing foundation (6).
La dimension des armatures (et donc de la pointe) varie en fonction des charges à reprendre par les micro-pieux.The size of the reinforcement (and therefore the point) varies according to the loads to be taken up by the micro-piles.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0110049A FR2827887B1 (en) | 2001-07-26 | 2001-07-26 | VERINE MICRO PILE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0110049A FR2827887B1 (en) | 2001-07-26 | 2001-07-26 | VERINE MICRO PILE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2827887A1 true FR2827887A1 (en) | 2003-01-31 |
| FR2827887B1 FR2827887B1 (en) | 2004-01-16 |
Family
ID=8865976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0110049A Expired - Fee Related FR2827887B1 (en) | 2001-07-26 | 2001-07-26 | VERINE MICRO PILE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2827887B1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985351A (en) * | 1963-01-29 | 1965-03-10 | Ludwig Muller | Method of and means for underpinning buildings |
| US3796055A (en) * | 1972-05-19 | 1974-03-12 | R Mahony | Method and apparatus for underpinning and raising a building foundation |
| FR2739405A1 (en) * | 1995-10-03 | 1997-04-04 | Labrue Jean Marie | Under=pinning method for existing structure exposed by river bed |
-
2001
- 2001-07-26 FR FR0110049A patent/FR2827887B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985351A (en) * | 1963-01-29 | 1965-03-10 | Ludwig Muller | Method of and means for underpinning buildings |
| US3796055A (en) * | 1972-05-19 | 1974-03-12 | R Mahony | Method and apparatus for underpinning and raising a building foundation |
| FR2739405A1 (en) * | 1995-10-03 | 1997-04-04 | Labrue Jean Marie | Under=pinning method for existing structure exposed by river bed |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2827887B1 (en) | 2004-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PLFP | Fee payment |
Year of fee payment: 16 |
|
| PLFP | Fee payment |
Year of fee payment: 17 |
|
| PLFP | Fee payment |
Year of fee payment: 18 |
|
| ST | Notification of lapse |
Effective date: 20200306 |