FR2546262A2 - Method for obtaining hollow structures, such as pipes, silos or shelters and structures obtained by this method - Google Patents

Method for obtaining hollow structures, such as pipes, silos or shelters and structures obtained by this method Download PDF

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Publication number
FR2546262A2
FR2546262A2 FR8308167A FR8308167A FR2546262A2 FR 2546262 A2 FR2546262 A2 FR 2546262A2 FR 8308167 A FR8308167 A FR 8308167A FR 8308167 A FR8308167 A FR 8308167A FR 2546262 A2 FR2546262 A2 FR 2546262A2
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France
Prior art keywords
supports
sections
rolling
elements
prestressing
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FR8308167A
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French (fr)
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FR2546262B2 (en
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Priority to FR8308167A priority Critical patent/FR2546262B2/en
Priority to PCT/FR1984/000132 priority patent/WO1984004573A1/en
Priority to EP84401003A priority patent/EP0126011B1/en
Priority to US07/700,885 priority patent/US4835936A/en
Priority to AT84401003T priority patent/ATE35449T1/en
Priority to DE8484401003T priority patent/DE3472439D1/en
Priority to AU29637/84A priority patent/AU2963784A/en
Publication of FR2546262A2 publication Critical patent/FR2546262A2/en
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Publication of FR2546262B2 publication Critical patent/FR2546262B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/22—Pipes composed of a plurality of segments

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

The invention relates to a method for obtaining hollow structures, such as pipes, silos or shelters, according to the main patent 81 21510. The method is characterised in that, when assembling a certain length of hollow structure, corresponding to several longitudinal sections placed end to end, these sections are placed on longitudinal supports intended to prevent friction of the ground against the base of the structure and the said structure is subjected to a prestressing operation with the aid of cables arranged longitudinally, with relative displacement of the sections of the hollow structure with respect to the said supports; rolling or sliding members, for example round concrete-reinforcing bars 6, 7, 8, 9 are interposed between the longitudinal supports L1, L2 and the sections T1, T2, T3 of the structure.

Description

La présente invention concerne un nouveau moyen de mi se en oeuvre du procédé d'obtention de structures creuses, telle que des conduits, silos ou abris, conforme au brevet ~principal No 81 21 510. The present invention relates to a new means of implementing the process for obtaining hollow structures, such as conduits, silos or shelters, according to the main patent No. 81 21 510.

Pour améliorer la résistance d'une telle structure creuse une fois qu'elle a été assemblée sur le chantier,il est judicieux de la soumettre à ue post-contrainte de maniè- re à solidariser plus étroitement les différentes coquilles constituant la structure, à améliorer l'étanchéité de l'en- semble et à rendre inutiles les butées à l'endroit des coudes. To improve the strength of such a hollow structure once it has been assembled on site, it is wise to subject it to a post-stress so as to more closely join the different shells constituting the structure, to be improved sealing the assembly and making the stops at the elbows pointless.

Le procédé selon L'invention est caractérisé en ce que, lors de l'assemblage d'une certaine Longueur de structure creuse,correspondant à plusieurs tronçons longitudinaux mis bout à bout,on dispose ces tronçons sur des supports longitu dinaux destinés à empêeher le frottement du sol contre la base de la structure et on soumet ladite structure à une opération de précontrainte à L'aide de câbles ou tiges disposés longitudinalement,avec dépLacement relatif de tronçons de la structure creuse par rapport auxdits supports. The method according to the invention is characterized in that, during the assembly of a certain length of hollow structure, corresponding to several longitudinal sections placed end to end, these sections are placed on longitudinal supports intended to prevent friction soil against the base of the structure and subjecting said structure to a prestressing operation using cables or rods arranged longitudinally, with relative displacement of sections of the hollow structure relative to said supports.

Selon d'autres particularités de l'invention
a) lesdits supports longitudinaux sont constitués par des masses de lestage ou d'ancrage ou par des longrines de pose,
b) après la mise en contrainte de la longueur de structu re creuse,les masses de lestage ou ancrage ou les longri- nes sont fixées de façon définitive à la base de la structure,en particulier par vissage d'organes filetés à partir de
L'intérieur de celle-ci.According to other features of the invention
a) said longitudinal supports consist of ballast or anchoring masses or by laying sills,
b) after the stressing of the hollow structure length, the ballast or anchoring masses or the beams are permanently fixed to the base of the structure, in particular by screwing threaded members from
The interior of it.

c) il est prévu entre les masses de lestage ou d'ancra ge et les tronçons de la structure,des organes roulants ou glissants,
d) les organes roulants ou glissants sont constitués par des fers à béton ronds ou des feuilles glissantes métalli- ques ou plastiques, graissées
D'autres caractéristiques et avantages de L'invention seront mis en évidence dans la suite de la description, donnée à titre d'exemple non limitatif, en référence aux des sins annexés parmi lesquels
Fig. 1 représente, en vue en perspective, une
longueur de la structure creuse qui est pLacée sur des supports permettant sa précontrainte conformément au procédé selon l'invention, et
Fig. 2 est une vue partielle agrandie de la figure 1.c) it is provided between the ballast or anchoring masses and the sections of the structure, of the rolling or sliding members,
d) the rolling or sliding members consist of round concrete irons or metallic or plastic sliding sheets, greased
Other characteristics and advantages of the invention will be highlighted in the following description, given by way of nonlimiting example, with reference to the appended figures among which
Fig. 1 shows, in perspective view, a
length of the hollow structure which is placed on supports allowing it to be prestressed in accordance with the process according to the invention, and
Fig. 2 is an enlarged partial view of FIG. 1.

Sur le dessin annexé, on a représenté en vue en perspective une structure creuse de grande sectionedésignee dans son ensemble par SC, se composant d'une pluralité de tronço ns tels que TI, TZ, T3, eux-mêmes formés de plusieurs éléments préfabriqués désignés par 1, 2, 3, 4, 5 pour l'élé- ment T1. In the accompanying drawing, there is shown in perspective view a hollow structure of large section designated as a whole by SC, consisting of a plurality of sections such as TI, TZ, T3, themselves formed of several prefabricated elements designated by 1, 2, 3, 4, 5 for the element T1.

Pour améliorer la résistance et la cohésion de la structure creuse et de ses tronçons composants, on opère selon l'invention de la façon suivante : après avoir assemblé une certaine Longueur de structure creuse, correspondant à plusieurs tronçons longitudinaux T18 T2, T3, etc. mis bout à bout, on soumet cette Longueur de structure à une pré
contrainte à l'aide des câbles C placés dans des canaux D dis posés longitudinalement, dans l'épaisseur des éléments, comme
indiqué sur la figure 2. Il est à noter que cette sollicitation de la structure est considérée comme une précontrainte avant la mise en service et comme une post-contrainte après
La mise en place. Cependant, si les tronçons étaient mis en place directement sur le sol, ils ne pourraient pas être déplacés relativement à cause du frottement exercé par le sol.To improve the strength and cohesion of the hollow structure and its component sections, the procedure is as follows: after assembling a certain length of hollow structure, corresponding to several longitudinal sections T18 T2, T3, etc. put end to end, we submit this Structure length to a pre
constraint using cables C placed in channels D arranged longitudinally, in the thickness of the elements, as
indicated on figure 2. It should be noted that this stress on the structure is considered as a pre-stress before commissioning and as a post-stress after
The establishment. However, if the sections were placed directly on the ground, they could not be moved relatively due to the friction exerted by the ground.

En conséquence, pour éviter que la tension des câbles ne soit rendue inefficace par le frottement du terrain, on dispose au préalable, sous La structure creuse, des supports longitudinaux, comme indiqué en L1 et L2 sur la figure. Consequently, in order to prevent the tension of the cables from being rendered ineffective by the friction of the ground, there are previously, under the hollow structure, longitudinal supports, as indicated in L1 and L2 in the figure.

Ces supports longitudinaux peuvent être constitués par des masses de lestage ou d'ancrage.These longitudinal supports can be constituted by ballast or anchoring masses.

Cependant, conformément à une autre caractéristi- que de L'invention, pour diminuer encore le frottement qui s'exerce entre la base de la structure creuse et Les supports
longitudinaux, on dispose entre Ladite base et lesdits sup
ports des organes glissants ou roulants, comme indiqué en 6,6'; 7,7'; 8,8', 9,9'. Par exemple, on peut utiliser comme organes roulants de simples fers à béton ronds. On peut aussi prévoir d'intercaler des feuilles métalliques ou plastique; graissées.However, in accordance with another characteristic of the invention, to further reduce the friction which is exerted between the base of the hollow structure and the supports
longitudinal, there is between said base and said sup
ports of sliding or rolling parts, as indicated in 6.6 '; 7.7 '; 8.8 ', 9.9'. For example, simple round concrete irons can be used as rolling members. It is also possible to insert metal or plastic sheets; greased.

Les câbles de précontrainte peuvent aussi être disposés longitudinalement à l'extérieur de La structure creuse, de préférence en dehors des masses de lestages ou d'ancrage et la structure proprement dite. Il est d'ailleurs à noter que les masses de lestage ou d'ancrage peuvent être remplacées oar des longrines de pose. The prestressing cables can also be arranged longitudinally outside the hollow structure, preferably outside the ballast or anchoring masses and the structure itself. It should also be noted that the ballast or anchor masses can be replaced by laying beams.

Après la mise en contrainte de la longueur de structure, les masses de lestage ou d'ancrage ou bien les longrines peuvent être fixées de façon définitive à la base de la structure et ou dans le sol en particulier à L'aide d'organes filetés qui sont vissés à partir de l'intérieur de la structure. A cet effet il est prévu, dans L'exemple des réalisations, des trous 10,11 , 10',11 de passage des organes filetés au travers de la structure, ces trous étant oblongs pour s'adapter au déplacement relatif des tronçons TI, T2, T3......  After stressing the length of the structure, the ballast or anchor masses or the sills can be permanently fixed to the base of the structure and or in the ground in particular using threaded members which are screwed from inside the structure. To this end, there are provided, in the example of the embodiments, holes 10, 11, 10 ′, 11 for passage of the threaded members through the structure, these holes being oblong to adapt to the relative displacement of the sections TI, T2, T3 ......

lors de la mise en contrainte.during stressing.

Dans tout ce qui précède, on a décrit l'assemblage de tronçons longitudinaux placés bout-à-bout et mis sous précontrainte à l'aide de câbles ou bar-res disposées longitu dinalement. L'invention peut aussi être appliquée au cas ou des structures de grande dimension formées de plusieurs ele ments pour une même section transversale sont mises sous précontraintes à l'aide de câbles ou barres disposées dans un plan transversal. Dans ce cas, les éléments formant la partie inférieure de la structure présentent des surfaces houri zonales de support, portees par exempLe par des épaulements en saillie, et qui reposent sur des supports destinés à empecher ou réduire le frottement sur le sol. In all of the above, we have described the assembly of longitudinal sections placed end-to-end and put under prestressing with cables or bars-res arranged longitu dinalement. The invention can also be applied to the case where large structures formed of several elements for the same cross section are put under prestressing using cables or bars arranged in a transverse plane. In this case, the elements forming the lower part of the structure have hourly zonal support surfaces, carried for example by projecting shoulders, and which rest on supports intended to prevent or reduce friction on the ground.

Les fers à béton, si on les utilise, sont alors disposes avec leur axe dirigé longitudinalement. Concrete bars, if used, are then arranged with their axes directed longitudinally.

Si on utilise des feuilles métaLliques ou plastiques, graissées, elles peuvent servir à faciliter la mise en précontrainte aussi bien dans une direction que dans l'autre.  If greased metallic or plastic sheets are used, they can be used to facilitate prestressing in one direction as well as in the other.

Claims (8)

REVENDICATIONS Sure et on soumet ladite structure à une opération de précontrainte à l'aide de cible CC), avec déplacement relatif des éléments de La structure creuse par rapport auxdits supports.Secure and subject said structure to a prestressing operation using target CC), with relative displacement of the elements of the hollow structure relative to said supports. l. Procédé d'obtention de structures treuses, telles que des conduits, silos ou abris selon l'une des revendications 1 à 6 du brevet principal No 8121 510, caractérisé en ce que,lors de liassem- blage cl'éléments adjacentslongitudinalenî@nt ou transversalement, on dispose ces éléments sur des supports (L1, L2) destinés à empêcher le frottement du sol contre la base de La Struco  l. Method for obtaining hollow structures, such as conduits, silos or shelters according to one of claims 1 to 6 of main patent No. 8121 510, characterized in that, when bundling adjacent elements, longitudinal or transversely or transversely , these elements are placed on supports (L1, L2) intended to prevent the friction of the ground against the base of La Struco 2. Procédé selon la revendication 10 caractérisé en ce que lesdits supports (L1, L2) sont constitués par des masses de lestage ou d'ancrage ou par dos longrines de po se. 2. Method according to claim 10 characterized in that said supports (L1, L2) are constituted by ballast or anchoring masses or by back beams of po se. 3. Procédé selon L'une des revendications 1 et 2, 6a- ractérisé en ce que, après la mise en contrainte de la lon- gueur de structure creuse, les supports sont fixés de façon définitive à la base de la structure, en particulier par vissage d'organes filetés à partir de l'intérieur de celle-ci. 3. Method according to one of claims 1 and 2, 6a- characterized in that, after the stressing of the length of the hollow structure, the supports are permanently fixed to the base of the structure, in particular by screwing in threaded members from the inside thereof. 4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il est prévu entre les supports et tes tronçons de la structure des organes roulants ou glissants (6, 6' à 9, 9'). 4. Method according to any one of claims 1 to 3, characterized in that it is provided between the supports and your sections of the structure of the rolling or sliding members (6, 6 'to 9, 9'). 5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les organes roulants ou glis- sants sont constitués par des fers à béton ronds. 5. Method according to any one of claims 1 to 4, characterized in that the rolling or sliding members consist of round concrete irons. 6. Procédé seLon l'une quelconque des revendications 9 à 4, caractérisé en ce que Les organes roulants ou glissants sont constitués par des feuilles métalliques ou en plastique , graissées. 6. Method according to any one of claims 9 to 4, characterized in that the rolling or sliding members consist of metallic or plastic sheets, greased. 7. Procédé selon lune quelconque des revendications 1 à 6, caractérisé en ce que la précontrainte est appliquée 7. Method according to any one of claims 1 to 6, characterized in that the prestressing is applied longitudinalement entre tronçons successifs. longitudinally between successive sections. 8. Procédé selon L'une queLconque des revendications 1 a 6, caractérisé en ce que la précontrainte est appliquée transversalement entre éLéments d'un meme tronçon.  8. Method according to one queLconque of claims 1 to 6, characterized in that the prestressing is applied transversely between elements of the same section.
FR8308167A 1983-05-17 1983-05-17 PROCESS FOR OBTAINING HOLLOW STRUCTURES, SUCH AS DUCTS, SILOS OR SHELTERS AND STRUCTURES OBTAINED BY THIS PROCESS Expired FR2546262B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR8308167A FR2546262B2 (en) 1983-05-17 1983-05-17 PROCESS FOR OBTAINING HOLLOW STRUCTURES, SUCH AS DUCTS, SILOS OR SHELTERS AND STRUCTURES OBTAINED BY THIS PROCESS
PCT/FR1984/000132 WO1984004573A1 (en) 1983-05-17 1984-05-16 Method for obtaining hollow structures such as conduits, silos or shelters
EP84401003A EP0126011B1 (en) 1983-05-17 1984-05-16 Process for obtaining hollow structures such as ducts, silos or shelters
US07/700,885 US4835936A (en) 1983-05-17 1984-05-16 Process for obtaining hollow structures such as conduits, silos or shelters
AT84401003T ATE35449T1 (en) 1983-05-17 1984-05-16 PROCESSES FOR THE MANUFACTURE OF HOLLOW ELEMENTS SUCH AS PIPES, SILOS OR BUNKER.
DE8484401003T DE3472439D1 (en) 1983-05-17 1984-05-16 Process for obtaining hollow structures such as ducts, silos or shelters
AU29637/84A AU2963784A (en) 1983-05-17 1984-05-16 Procede d'obtention de structures creuses telles que conduitssilos ou abris

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8308167A FR2546262B2 (en) 1983-05-17 1983-05-17 PROCESS FOR OBTAINING HOLLOW STRUCTURES, SUCH AS DUCTS, SILOS OR SHELTERS AND STRUCTURES OBTAINED BY THIS PROCESS

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Publication Number Publication Date
FR2546262A2 true FR2546262A2 (en) 1984-11-23
FR2546262B2 FR2546262B2 (en) 1986-07-25

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FR8308167A Expired FR2546262B2 (en) 1983-05-17 1983-05-17 PROCESS FOR OBTAINING HOLLOW STRUCTURES, SUCH AS DUCTS, SILOS OR SHELTERS AND STRUCTURES OBTAINED BY THIS PROCESS

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FR (1) FR2546262B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936431A (en) * 2010-09-17 2011-01-05 苏州华越金属有限公司 Connecting pipe and connecting pipe assembly with same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1191640B (en) * 1962-01-02 1965-04-22 Dyckerhoff & Widmann Ag Composite pipe made of stoneware and concrete
FR1597170A (en) * 1968-12-26 1970-06-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1191640B (en) * 1962-01-02 1965-04-22 Dyckerhoff & Widmann Ag Composite pipe made of stoneware and concrete
FR1597170A (en) * 1968-12-26 1970-06-22

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DR. ING. F. LEONHARDT: "Spannbeton f}r die Praxis", 2ème édition, Berlin, 1962, Verlag von Wilhelm Ernst & Sohn, page 530-533. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936431A (en) * 2010-09-17 2011-01-05 苏州华越金属有限公司 Connecting pipe and connecting pipe assembly with same

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Publication number Publication date
FR2546262B2 (en) 1986-07-25

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