Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent
1986-02-05
1987-09-15
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
52 86, 405124, 405151, E21D 500
Patent
active
046936343
DESCRIPTION:
BRIEF SUMMARY
The invention relates to prefabricated support and cover structures, particularly for making tunnels, bridges and the like. More precisely the invention relates to prefabricated structures including a number of modular bodies of polygonal sector shape disposed side-by-side in succession along the longitudinal axis of the structure.
The problem which arises in structures of the aforesaid kind is that of making modular bodies, at least partly prefabricated, which can be handled, which are easy to install on site and which are predisposed so as to form, when assembled, a solid and monolithic structure.
Some structures used in the field of construction of artificial tunnels, small bridges and the like envisage the prefabrication of only the roof panels, with the disadvantage of having to cast on site the piers, that is, the pillars and/or lateral support walls. Other structures envisage separate prefabrication of the roofs and piers; in this case it proves particularly difficult to achieve satisfactorily and economically a rigid connection between the roof and piers; more commonly, in fact, use is made of covers which simply rest on the piers, even though much greater thicknesses and reinforcements are needed. Apart from the above, other structures are also available in which the modular bodies are prefabricated in a single monolithic element and thus have smaller thicknesses; such modular bodies are, however, difficult to transport, so that it is practically impossible to use them to build structures of relatively large dimensions.
The object of the present invention is to provide a prefabricated support and covering structure, particularly for constructing artificial tunnels, small bridges and the like, which does not have substantially the disadvantages previously mentioned and allows the construction of very solid structures, of relatively large dimensions, using modular bodies which are almost completely prefabricated and at the same time easily transportable.
With a view to achieving this object the invention provides a prefabricated support and covering structure particularly for building artificial tunnels, small bridges and the like, comprising a plurality of modular bodies in the shape of polygonal sectors, arranged side-by-side in succession along the longitudinal axis of the structure, characterised in that each modular body is constituted by at least one prefabricated element comprising two or more panels of reinforced concrete disposed in succession along the polygonal line which defines the cross-section of the prefabricated structure, each panel being connected to the adjacent panel by articulation means and means for reciprocal positioning, the articulation means consisting of a plurality of connecting reinforcement rods extending from each panel to the adjacent panel.
The invention will now be described with reference to a preferred practical embodiment ilustrated in the appended drawings, supplied purely by way of non-limiting example, in which:
FIG. 1 is a perspective view of a prefabricated support and covering structure according to the invention;
FIG. 2 is a front view, partially in section, taken along the line II--II of the structure of FIG. 1;
FIG. 3 is a perspective view of a component of FIG. 1 illustrated on site, before erection;
FIG. 4 is a lateral view in the direction of the arrow IV in FIG. 3;
FIG. 5 is a view on an enlarged scale of a detail of FIG. 4;
FIG. 6 and FIG. 7 are sections taken along the lines VI--VI and VII--VII respectively in FIG. 4;
FIGS. 8, 9, 10, 11 are diagrammatic views of a device for lifting the component in FIG. 3, arranging it in its final assembly form and installing it on site, illustrated in various successive operational stages;
FIGS. 12 and 13 are sectional views taken along the lines XII--XII and XIII--XIII in FIG. 1, and
FIG. 14 is a variant of FIG. 2.
Indicated as 1 in its entirety is a prefabricated support and covering structure, particularly suitable for building artificial tunnels, small bridges and the like, such as, for example, undergroun
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Taylor Dennis L.
Tensiter S.p.A.
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