FR2503210A3 - PROCESS FOR ANCHORING A TUBE AS A NON-RIGID ANCHOR AND TUBE FOR PERFORMING THE PROCESS - Google Patents

PROCESS FOR ANCHORING A TUBE AS A NON-RIGID ANCHOR AND TUBE FOR PERFORMING THE PROCESS Download PDF

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Publication number
FR2503210A3
FR2503210A3 FR8205286A FR8205286A FR2503210A3 FR 2503210 A3 FR2503210 A3 FR 2503210A3 FR 8205286 A FR8205286 A FR 8205286A FR 8205286 A FR8205286 A FR 8205286A FR 2503210 A3 FR2503210 A3 FR 2503210A3
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France
Prior art keywords
tube
anchoring
drilled hole
pipe
wall
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
FR8205286A
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French (fr)
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FR2503210B3 (en
Inventor
Hans Thoma
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Schweizerische Industrie Gesellschaft
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Schweizerische Industrie Gesellschaft
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 Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Publication of FR2503210A3 publication Critical patent/FR2503210A3/en
Application granted granted Critical
Publication of FR2503210B3 publication Critical patent/FR2503210B3/fr
Granted legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/80Ground anchors
    • E02D5/808Ground anchors anchored by using exclusively a bonding material

Abstract

In the method of anchoring a pipe (2) serving as a slack anchor, the pipe (2) itself is used as a drill for producing the bore hole. For this purpose, it is equipped at its front end with cutting edges (3) which form a drill head. The pipe (2) then remains in the bore hole. A bonding medium, e.g. a two-component adhesive, is then injected into the pipe (2), which bonding medium comes out at the pipe orifice and fills the annular space (5) between the wall (6) of the bore hole and the pipe (2). In this way, slack anchors can be inserted more quickly and with less use of material.

Description

Il est décrit , dans le brevet suisse nO 620 496, un procédé pour l'ancrage d'un tube dans un trou foré, ce tube étant destiné a servir d'ancre dite non rigide, c'est-a-dire d'ancre qui n'est pas précontrainte. D'après ce procédé connu, on commence par forer un trou au moyen d'un fleuret a roches usuel, puis on retire le fleuret à roches et on insère dans le trou foré un tube dont le diamètre est un peu plus petit, on le centre et on le fixe. On injecte ensuite sous haute pression une colle å deux constituants-dans le tube, jusqu'S ce qu'elle jaillisse au fond du trou foré et qu'elle remplisse également l'intervalle entre le trou foré et la paroi extérieure du tube. There is described in Swiss Patent No. 620 496 a method for anchoring a tube in a drilled hole, this tube being intended to serve as a so-called non-rigid anchor, that is to say an anchor which is not prestressed. According to this known method, we start by drilling a hole using a standard rock foil, then we remove the rock foil and we insert into the drilled hole a tube whose diameter is a little smaller, we center and we fix it. A two-component glue is then injected under high pressure into the tube, until it spurts to the bottom of the drilled hole and also fills the gap between the drilled hole and the outer wall of the tube.

Après durcissement de la colle, l'ancre non rigide est prête à être utilisée.After the adhesive has hardened, the non-rigid anchor is ready to be used.

Ce procédé a fait ses preuves, mais il est quelque peu coûtent, dans le cas par exemple ou, pour la construction de tunnels, il faut mettre en place de très nombreuses ancres non rigides. L'extraction des tiges de sonde, effectuée chaque fois, et l'insertion des tubes prennent un certain temps qui se multiplie par sa répétition. This process has been proven, but it is somewhat costly, in the case for example or, for the construction of tunnels, it is necessary to place very many non-rigid anchors. The extraction of the probe rods, carried out each time, and the insertion of the tubes take a certain time which multiplies by its repetition.

Le but de l'invention est d'améliorer ce procédé connu, de telle manière qu'il prenne moins de temps et aussi que les frais de matériaux soient réduits. The object of the invention is to improve this known process, in such a way that it takes less time and also that the costs of materials are reduced.

L'invention concerne donc un procédé pour l'ancrage d'un tube servant d'ancre non rigide dans la roche ou la terre, en vue de son soutien ou de sa fixation, consistant à former un trou foré dont le diamètre est plus grand que celui du tube et a injecter, après l'achèvement du trou foré, un produit adhésif a travers le tube maintenu en position centrée dans le trou, jusqu'a ce que l'intervalle entre la paroi extérieuredu tube et la paroi du trou foré soit complètement rempli. Le but mentionné est atteint d'après l'invention par le fait qu'on munit de tranchants, à son extrémité antérieure, le tube destiné l'ancrage et qu'on l'utilise lui-meme pour former le trou foré, dans lequel il est laissé après l'achèvement de l'opération de forage, puis on introduit le produit adhésif dans le tube. The invention therefore relates to a method for anchoring a tube serving as a non-rigid anchor in rock or earth, with a view to supporting or fixing it, consisting in forming a drilled hole whose diameter is larger than that of the tube and to inject, after the completion of the drilled hole, an adhesive product through the tube maintained in position centered in the hole, until the interval between the outside wall of the tube and the wall of the drilled hole is completely filled. The object mentioned is achieved according to the invention by the fact that it is provided with cutting edges, at its anterior end, the tube intended for anchoring and that it itself is used to form the drilled hole, in which it is left after the completion of the drilling operation, then the adhesive product is introduced into the tube.

Du fait que l'on utilise en même temps comme fleuret le tube qui sert d'ancre et qui reste ensuite dans le trou foré, le temps nécessaire pour chaque extraction de la tige de sonde et pour l'insertion du tube peut être économisé. Du fait que les tranchants formés sur le tube pour servir de taillant ne sont destinés qu'a un seul usage, on peut se passer de matériaux pour outils tranchants, de haute qualité et croûteux. On n'utilise plus de tiges de sonde onéreuses, dont les tranchants doivent être réaffutés périodiquement. En outre, on peut donner a l'espace annulaire entre la paroi du tube et la paroi du trou foré des dimensions plus petites qu'en cas d'utilisation d'une tige de sonde usuelle. De ce fait, la Consommation de produit adhésif est également plus faible. Because the tube which serves as an anchor and which then remains in the drilled hole is used at the same time as a foil, the time required for each extraction of the probe rod and for the insertion of the tube can be saved. Because the cutting edges formed on the tube to serve as a cutter are for one use only, high-quality, crusty cutting tool materials can be dispensed with. No more expensive probe rods are used, the cutting edges of which must be re-sharpened periodically. In addition, it is possible to give the annular space between the wall of the tube and the wall of the drilled hole of smaller dimensions than when using a usual probe rod. As a result, the consumption of adhesive product is also lower.

L'invention concerne aussi un tube pour l'exécution du procédé ci-dessus défini, ce tube étant caractérisé par le fait qu'il est équipé de tranchants a son extrémités antérieure en vue du forage d'un trou d'ancrage. The invention also relates to a tube for carrying out the method defined above, this tube being characterized in that it is equipped with cutting edges at its anterior ends for drilling an anchor hole.

L'invention est expliquée ci-après de façon plus détaillée, en référence aux dessins annexes. Ceux-ci illustrent un exemple de réalisation d'un tube suivant l'invention pour l'exécution du procédé suivant l'invention. The invention is explained below in more detail, with reference to the accompanying drawings. These illustrate an embodiment of a tube according to the invention for carrying out the method according to the invention.

La figure 1 représente une ancre non rigide, constituée par un tube. Figure 1 shows a non-rigid anchor, consisting of a tube.

La figure 2 représente la partie avant du tube avec les tranchants rapportés. Figure 2 shows the front part of the tube with the cutting edges added.

La figure 3 est une vue du côté frontal antérieur du tube. Figure 3 is a view of the front front side of the tube.

L'ancre non rigide, destinée a être ancrée dans la roche ou dans la terre 1, est constituée par un tube 2 d'une matière résistante à la traction, par exemple l'acier. A son extrémité antérieure, le tube 2 est équipé de deux tranchants de métal dur 3 qui y sont soudés et qui font quelque peu saillie sur le diamètre extérieur du tube. A son extrémité arrière, le tube présente des moyens en soi connus, par exemple une encoche 4, pour son accouplement avec une perforatrice. Ainsi, le tube 2 sert tout d'abord de tige de sonde pour la formation du trou foré. Pendant le forage, un fluide de balayage (eau, air ou similaires) est injecté de façon connue en soi dans le tube 2 pour évacuer la roche détachée, parfois appelée menu de forage, par l'espace annulaire 5 entre la paroi du tube 2 et la paroi 6 du trou foré.Lorsque la profondeur de forage voulue a été atteinte, ce qui correspond pratiquement à la longueur du tube 2, un produit adhésif est injecté sous haute pression dans le tube 2. Ce produit jaillit a l'extrémité avant du tube et remplit l'espace annulaire 5. Le remplissage est achevé au moment où le produit adhésif apparait a la surface de la roche ou de la terre. The non-rigid anchor, intended to be anchored in rock or in the earth 1, consists of a tube 2 of a material resistant to traction, for example steel. At its anterior end, the tube 2 is equipped with two hard metal cutting edges 3 which are welded to it and which protrude somewhat from the outside diameter of the tube. At its rear end, the tube has means known per se, for example a notch 4, for its coupling with a perforator. Thus, the tube 2 first serves as a probe rod for the formation of the drilled hole. During drilling, a sweeping fluid (water, air or the like) is injected in a manner known per se into the tube 2 to evacuate the loose rock, sometimes called the drilling menu, through the annular space 5 between the wall of the tube 2 and the wall 6 of the drilled hole. When the desired drilling depth has been reached, which corresponds practically to the length of the tube 2, an adhesive product is injected under high pressure into the tube 2. This product spurts out at the front end of the tube and fills the annular space 5. The filling is completed when the adhesive product appears on the surface of the rock or the earth.

En tant que produit adhésif, on utilise de façon connue en soi une colle a deux constituants. Dans ce cas, il est opportun d'insérer dans le tube un dispositif mélangeur en soi connu, sous la forme d'un cylindre creux 7 comportant des chicanes 8 disposées en quinconce, dispositif qui assure un bon mélange intime des deux constituants de la colle. Mais on pourrait aussi utiliser du béton comme produit adhésif. As an adhesive product, a two-component adhesive is used in a manner known per se. In this case, it is advisable to insert into the tube a mixing device known per se, in the form of a hollow cylinder 7 comprising baffles 8 arranged in staggered rows, a device which ensures good intimate mixing of the two constituents of the adhesive. . But we could also use concrete as an adhesive product.

Pendant l'injection du produit adhésif, les tranchants 3 servent en même temps d'organes de centrage pour l'extrémité avant du tube 2, ce qui fait qu'il n'y a besoin de maintenir en position centree que l'extrémité arrière du tube, jusqu'a ce que le produit adhésif ait été completement injecté. During the injection of the adhesive product, the cutting edges 3 serve at the same time as centering members for the front end of the tube 2, so that there is no need to maintain in the centered position that the rear end of the tube, until the adhesive product has been completely injected.

Le tube 2, réalisé sous forme de fleuret a usage unique, peut être fabriqué dans des conditions relativement économiques, car on peut se passer de l'util-isation de matériaux de haute qualité pour les tranchants. et pour le tube. The tube 2, produced in the form of a single-use foil, can be manufactured under relatively economical conditions, because one can do without the use of high-quality materials for the cutting edges. and for the tube.

Le tube décrit, qui est beaucoup moins motteux qu'une tige de sonde usuelle, peut être également utilisé à d'autres fins. Par exemple, il convient bien pour le perçage de matières tendres, telles que le charbon. Si la paroi du tube 2 est munie de trous traversants, il peut également servir de tuyau de drainage, puisqu'il est capable de percer lui-même son trou foré, de même qu'en cas d'établissement d'une ancre non rigide.  The tube described, which is much less lumpy than a conventional probe rod, can also be used for other purposes. For example, it is well suited for drilling soft materials, such as coal. If the wall of the tube 2 is provided with through holes, it can also serve as a drainage pipe, since it is capable of drilling its own drilled hole, as well as in the event of the establishment of a non-rigid anchor .

Claims (4)

REVENDICATIONS 1. Procéde pour l'ancrage d'!un tube servant d'ancre non rigide dans la roche ou la terre, en vue de son soutien ou de sa fixation, consistant a former un trou foré dont le diamètre est plus grand que celui du tube et a injecter, après l'ache- vement du trou foré, un produit adhésif a travers le tube maintenu en position centrée dans le trou, jusqu'S ce que l'intervalle entre la paroi extérieure du tube et la paroi du trou foré soit completement rempli, caractérisé en ce qu'on munit de tranchants (3), a son extrémité antérieure, le tube (2) destiné a l'ancrage et on l'utilise lui-meme pour former le trou foré, dans lequel il est laissé après l'achèvement de l'opération de forage, puis on injecte le;produit adhésif dans le- tube. 1. Method for anchoring a tube serving as a non-rigid anchor in rock or soil, with a view to supporting or fixing it, consisting in forming a drilled hole whose diameter is larger than that of tube and to inject, after the completion of the drilled hole, an adhesive product through the tube maintained in position centered in the hole, until the interval between the external wall of the tube and the wall of the drilled hole is completely filled, characterized in that it is provided with cutting edges (3), at its anterior end, the tube (2) intended for anchoring and it is used itself to form the drilled hole, in which it is left after the completion of the drilling operation, then the adhesive product is injected into the tube. 2. Tube pour l'exécution du procédé selon la revendication 1, caractérisé en ce qu'il est équipé de tranchants (3) à son extrémité antérieure en vue du forage de son propre trou d'ancrage. 2. Tube for carrying out the method according to claim 1, characterized in that it is equipped with cutting edges (3) at its anterior end for the drilling of its own anchoring hole. 3. Utilisation du tube selon la revendication 2 comme tige de sonde pour le perçage de matiere tendres, par exemple de charbon. 3. Use of the tube according to claim 2 as a probe rod for drilling soft material, for example carbon. 4. Utilisation du tube selon la revendication 2, dont la paroi est munie de trous traversants, comme tuyau de drainage.  4. Use of the tube according to claim 2, the wall of which is provided with through holes, as a drainage pipe.
FR8205286A 1981-04-06 1982-03-29 PROCESS FOR ANCHORING A TUBE AS A NON-RIGID ANCHOR AND TUBE FOR PERFORMING THE PROCESS Granted FR2503210A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH232481 1981-04-06

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FR2503210A3 true FR2503210A3 (en) 1982-10-08
FR2503210B3 FR2503210B3 (en) 1983-03-11

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FR8205286A Granted FR2503210A3 (en) 1981-04-06 1982-03-29 PROCESS FOR ANCHORING A TUBE AS A NON-RIGID ANCHOR AND TUBE FOR PERFORMING THE PROCESS

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AU (1) AU8261882A (en)
DE (1) DE3210696A1 (en)
FR (1) FR2503210A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004101914A1 (en) * 2003-05-14 2004-11-25 Resin Systems Inc. Method of installing poles in a rock surface

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005647A1 (en) * 1986-03-17 1987-09-24 Norman Frederick Howell Improvements to ground anchors
GB2189829B (en) * 1986-04-25 1989-11-29 Shell Int Research Method for installing a hollow, closed bottom pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004101914A1 (en) * 2003-05-14 2004-11-25 Resin Systems Inc. Method of installing poles in a rock surface

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Publication number Publication date
DE3210696A1 (en) 1982-10-21
AU8261882A (en) 1982-10-14
FR2503210B3 (en) 1983-03-11

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