FR2573789A1

FR2573789A1 - Method for relevelling a construction which is no longer vertical

Info

Publication number: FR2573789A1
Application number: FR8413630A
Authority: FR
Original assignee: BOSSER JEAN
Current assignee: BOSSER JEAN
Priority date: 1984-09-03
Filing date: 1984-09-03
Publication date: 1986-05-30

Abstract

Method making it possible to right a construction which is no longer vertical as a result of differential settlement of its foundation. It consists in lifting part of the building in order to set it in a vertical position again, by bearing on the end of rigid girders positioned perpendicularly to the facades which have settled the most and themselves lying on the ground outside the building, at a level close to that of the foundations. A device comprising a metal clamp makes it possible to apply the lifting force supplied by a jack to the centre of gravity of the foundation pad. Once the righting operation has been completed, the building is connected to the ground outside it by a concrete slab, the structure of which lies on the girders.

Description

La présente invention concerne un procédé pour la remise à niveau d'une construction qui présente un défaut d'aplomb à la suite d'un affaissement du sol d'assise de sa fondation. The present invention relates to a method for upgrading a construction which has a defect in balance following a subsidence of the foundation soil of its foundation.

Un tel défaut se produit fréquemment à la suite de l'apport contre une façade du batiment, d'une importante quantité de remblais et lorsque le sol d'assise est assez compressible(fig.1)
Habituellement, on a recours, pour redresser le bâtiment à un procédé consistant à enfoncer des pieux à l'aplomb des façades. On glisse des poutres sous les fondations du bâtiment et on les applique sur la tête des pieux après interposition d'un vérin. A l'aide de ce vérin on relève alors la construction pour la remettre d'aplomb-.Such a defect frequently occurs following the addition of a large amount of fill against a building facade and when the seat floor is fairly compressible (fig. 1)
Usually, a method is used to straighten the building by driving piles in line with the facades. Beams are slid under the building foundations and applied to the pile heads after interposition of a jack. With the aid of this jack, the construction is then raised to restore its balance.

Il s'agit d'une méthode efficace et précise mais elle est très onéreuse. It is an efficient and precise method but it is very expensive.

L'originalité de la présente invention réside dans le fait qu'elle n'exige pas de rechercher un appui à grande profondeur, dans les couches résistantes du sous sol. The originality of the present invention lies in the fact that it does not require seeking support at great depth, in the resistant layers of the subsoil.

Elle consiste à découvrir les fondations de la façade à redresser, pour permettre d'introduire sous les semelles des étriers métalliques suivant les dispositions des figures 5 eut 6. It consists of discovering the foundations of the facade to be straightened, to allow metal stirrups to be introduced under the soles according to the provisions of Figures 5 had 6.

La partie supérieure des étriers prend appui sur la tete mobile des vérins dont la base repose à l'extremité de longrines en béton ou en acier, dont la section a la forme d'un T renversé. The upper part of the stirrups rests on the movable head of the cylinders, the base of which rests at the end of concrete or steel beams, the section of which has the shape of an inverted T.

Ces longrines sont disposées perpendiculairement à la façade à redresser et reposent sur un ballast afin de limiter la pression sur le sol(fig.3). These sills are arranged perpendicular to the facade to be straightened and rest on a ballast in order to limit the pressure on the ground (fig. 3).

Elles sont dimentionnées pour supporter, sans déformations excessives, l'effort de relèvement de la construction, exercé par la mise en action des vérins. They are dimensioned to support, without excessive deformation, the lifting effort of the construction, exerted by the actuation of the jacks.

Eventuellement on peut, pour diminuer la pression sur le sol ou diminuer le poids des longrines, mettre du lest à l'autre extrémité et éviter ainsi le soulèvement, lors de la mise en action des vérins. Optionally, to reduce the pressure on the ground or reduce the weight of the sills, put ballast at the other end and thus avoid lifting, when the actuators are actuated.

L'enlèvement préalable d'une certaine quantité de remblai permet de disposer d'sol d'assise plus résistant, car ayant été pré-consolidé par le poids des terres que l'on a ensuite enlevées. The prior removal of a certain amount of backfill makes it possible to have more resistant base soil, because having been preconsolidated by the weight of the earths which were then removed.

Quand l'opération de redressement est terminée, les vérins sont remplacés par des cales métalliques. When the straightening operation is complete, the cylinders are replaced by metal shims.

Le raccordement du bâtiment avec lesol extérieur est assuré par un plancher en beton armé dont les poteaux sont ancres dans les longrines. The building is connected to the outside floor by a reinforced concrete floor, the posts of which are anchored in the side rails.

Claims

PEVENDI CATIONS

1) Method for straightening an inclined building by means of jacks bearing on concrete or steel sills placed on the ground, perpendicular to the sides to be raised.

2) Method according to claim t characterized in that the sills have the shape of an inverted T and rest on the ground after interposition of a ballast (fig. 3).

3) Method according to claims 1 and 2 characterized in that the mass, the resistance, the surface bearing on the ground of the sills are studied so as to allow lifting without excessive deformation, the building to straighten.

4) A method characterized by the fact that a jack placed at the end of the sill produces the lifting effort.

5) A method characterized by the fact that a metal stirrup allows the lifting force produced by the jack to be transmitted, even under the sole of the building (fig. 5 and 6).

6) A method characterized by the fact that, in place of the soil removed, after reinforcement of the building is produced, a reinforced concrete floor resting on the side rails (fig 4).

7) Method according to claim 5, characterized in that the stirrup is held in a vertical position by a gougon fixed in the end of the sill (fig. 5). The tightening of this gougon makes it possible to immobilize the stirrup to remove the jack and place shims once the lifting operation is finished.

8) A method characterized by the fact that it is possible, if desired, to slide the sill directly under the foundation sole, reserving sufficient space to interpose the jack between the top of the sill and the bottom of the foundation.