KR20100085709A - Multitube tubular construction - Google Patents

Abstract

The present invention discloses a tubular structure consisting of sections arranged in longitudinal connection seated on a horizontal and compacted laying surface (S). The tubular structure comprises at least two juxtaposed conduits C ₁ , C ₁₁ and each section has two outer members 2, 2 each bearing on a laying surface S. '), At least one intermediate member 2 ₁ and at least two vaulted members 5 ₁ , 5 ₂ . Each outer member 2, 2 ′ has a bottom plate that includes at least one flange 3i that extends horizontally in the manner of a bracket from the side wall 20 of the member 2, 2 ′ at its base. (4) is provided, two adjacent side members define a range of conduits C ₁ , C ₂ , C ₁₁ , and the vault members 5 ₁ , 5 ₂ have corresponding conduits C ₁ at the top. , C ₂ ) seats in each joint 6 of the upper edges of two adjacent side members 2, 2 ₁ , 2 ′.

Description

Multitube Tubular Structures {MULTITUBE TUBULAR CONSTRUCTION}

FIELD OF THE INVENTION The present invention relates to the field of tubular structures having flat bottoms seated on a leveled and compacted laying surface, which structures are arranged in sections and are formed of sections each formed of juxtaposed wall members. Is done.

As methods for the construction of liquid circulation conduits, for example for the construction of drainage networks, a section in which the conduits are arranged in a longitudinal connection, each formed of prefabricated concrete members bearing against each other at their longitudinal edges. The methods that consist of these are already well known. In this way, such devices are provided so that they generally do not exceed 1 to 2 m ² in cross section.

In addition, construction systems are known for the formation of conduits with much larger cross sections, even cross sections exceeding 100 m ² , resulting in the use of underground passages for river bypass under underground passages, embankments, etc. for vehicle circulation. It is possible.

The conduits obtained by this system may each include at least one substantially flat concrete slab member on the ground or in situ injected, two side members disposed on both sides of the concrete slab, and in the case of an embedded conduit Consisting of tubular sections arranged in terminations comprising a vaulted member seated at the upper edges of the side members. Each side member is a generally longitudinally oriented curved wall that is tangentially connected to the vault member at the top and horizontally connected to the concrete slab member at the bottom to form a smooth wall where the curvature changes continuously. Include. Moreover, the side members are connected to the concrete slabs, which ensure their stability and absorb the load on them.

Such structures are suitable for the production of monotube structures that form a single or single conduit.

However, when it is necessary to fabricate a multitube structure, employing several conventionally arranged tubular structures has resulted in a large footprint that is not always compatible with the constraints of placement.

Thus, a need has emerged for a new type of tubular structure for producing multitubes or multiconduits with less ground plane than juxtaposing several conventional monotube tubular structures for a given aperture section.

To achieve this object, the present invention relates to a tubular structure consisting of sections arranged in terminations which rest on a leveled and compacted laying surface. According to the invention, this tubular structure comprises at least two juxtaposed conduits and each section is

Two outer members and at least one intermediate member, each of which is supported on the laying surface, each outer member being provided with an extended bottom plate capable of allowing each outer member to stand without a foot in its base; At least one intermediate member and at least one intermediate member comprising at least one flange extending horizontally in the manner of a bracket from the member, wherein two adjacent side members define a range of conduits;

At least two vaulted members seated at each joint of the upper edges of the two adjacent side members to close the corresponding conduit at the top.

The present invention thus produces a multitube structure with a footprint that is less than occupied by being in close contact and juxtaposing several monotube tubular structures for the same number of tubes.

In one possible embodiment, the bottom plate of each outer member can be extended such that each outer member can stand without scaffolding.

According to one feature of the invention, each outer member has at its base an expanded bottom plate comprising an inner flange and an outer flange extending horizontally in the manner of a bracket on either side of the side wall of the member. The outer flange of the bearing bottom plate of each outer member extends beyond the width sufficient to ensure the stability of the member against the thrust force of the side applied by the vault member, assuming the forces applied to the bottom plate. . Although this is not strictly necessary, the outer flange preferably has a width larger than the width of the inner flange.

According to another feature of the invention, each intermediate member is provided with an extended bottom plate comprising two flanges extending horizontally in the manner of brackets on both sides of the member at its base.

Although this is not strictly necessary, the flanges of the supporting bottom plate of each intermediate member ensure the stability of the intermediate member against the lateral thrust exerted by a single vault member assuming the forces applied to the bottom plate. It extends beyond the width sufficient to.

In one embodiment of the tubular structure of the present invention, the joint between the vault member and each side member is articulated and on a concave rounded portion to define a longitudinal articulation axis. And a supporting projecting round.

In a variant of the present embodiment which allows the tubular structure of the invention to be implemented in seismic areas, the structure is characterized in that the seismic locking means for fixing the movement of the knuckled joint at each knuckled joint. It includes.

Seismic protection locking means according to the present invention can be produced by any suitable method.

Thus, according to one aspect of the invention, the seismic protection locking means comprises two exterior beads each attached to the side member and the vault member, one bead lengthwise tongue formed by the other bead. Defines the longitudinal groove engaged with the (longitudinal tongue).

According to another feature of the invention, the seismic protection locking means comprises at least one tie-rod connecting the two opposing parts of the vault member and the side member, the tie-rod being vaulted. It extends in two opposing channels formed in the member and the side member. Although this is not strictly necessary, it is desirable that the tie-rods and the channels bend so that the tie-rods pass through the longitudinal knuckle joints of the joint.

According to one feature of the invention, the vault member may comprise at least one transverse stiffener rib on the inner surface of the vault member. Using this kind of transverse ribs makes it possible to manufacture covered roads or conduits with very large passage sections.

In a preferred embodiment, each transverse rib forms an undeformed monoblock assembly molded in one piece from reinforced or prestressed concrete with a vaulted member.

In one embodiment, each conduit section includes a raft member extending between the bottoms of the two side members of the corresponding conduit. According to the invention, each raft member consists of a prefabricated member or the raft of each section of the conduit is made or injected in place. It should be noted that using a raft is not always essential for the fabrication of the tubular structure of the present invention.

Of course, various features, forms, and variations of the present invention may be associated with each other in various combinations unless they are mutually incompatible or exclusive.

Moreover, various other features of the invention emerge from the description given below with reference to the accompanying drawings showing non-limiting embodiments of the tubular structures of the invention. In the drawings, various members in common with the various embodiments and modifications carry the same references.

The tubular structure of the invention as shown in FIG. 1 comprises (1) at least two, exactly two juxtaposed conduits C ₁ and C ₂ in this example shown. Such conduits C ₁ and C ₂ may form underground passages or liquid circulation conduits for circulation of vehicles or pedestrians.

The tubular structure 1 is produced by joining tubular sections disposed on a horizontal and compacted laying surface S. Each section comprises two outer members 2 and 2 'and at least one separating the conduits C ₁ and C ₂ , in the example shown exactly one intermediate member 2 ₁ . Depending on the type of structure to be produced, the intermediate member 2 ₁ can be apertured or opened, for example for pedestrians to pass through. Each side member 2, 2 ₁ , 2 ′ comprises a base 3 which forms an extended bottom plate 4 whose bottom surface is substantially flat and bears on a leveled surface S. FIG. . Each base 3 preferably coincides so that the bottom plate 4 extends sufficiently to ensure the stability of the corresponding side member when at least the side member is placed on the ground without external load.

In the illustrated example, the base 3 includes a base ₍₃₁₎ of the inner flange (flange) (3 _i), but a substantially L-shape with the intermediate side member ₍₂₁₎ of each outer member (2, 2 ') Is T-shaped with two side flanges 3 _L.

Since each section of the tubular structure includes as many vaulted members as there are conduits C ₁ , C ₂ , in the example shown two at the top each closing the corresponding conduits C ₁ and C ₂ . Vault members 5 ₁ and 5 ₂ .

Each vault member 5 ₁ and 5 ₂ is seated through these lower parts on the tops of the corresponding side members 2, 2 ₁ and 2 ₂ . Thus, the first vault member 5 ₁ is seated on the left outer side member 2 and the middle side member 2 ₁ , while the second vault member 5 ₂ is the middle side member 2 ₁ and It rests on the right outer side member 2 '.

The connections 6 between the vault members 5 ₁ and 5 ₂ and the corresponding side members 2, 2 ₁ and 2 ′ are preferably corresponding side members 2, 2 ₁ and 2 ′. Are connected jointly to allow some movements of the vault members 5 ₁ , 5 _{2 relative to} ).

In the example shown, each conduit C ₁ , C ₂ comprises a raft member 7 ₁ and 7 _{2 at} its bottom.

To build the section, the raft members may first be placed in place and either prefabricated or in situ injected. The side members 2, 2 ₁ and 2 ₂ are then arranged and then fixed to the corresponding raft members 7 ₁ and 7 ₂ by mortar joints 9. Then the vault members 5 ₁ and 5 ₂ are arranged. In the case of rafts injected in situ, it may be derived to arrange the side members and then to manufacture them.

In order to avoid obstacles of the various sections constituting the tubular structure of the present invention and to ensure good alignment, the raft members 7 ₁ and 7 ₂ can be arranged to be common to two consecutive sections. In the same way round ceiling members 5 ₂ and 5 ₁ can be arranged so that they are offset relative to the side members 2, 2 ′ as shown in FIG. 2. Each vault member except the vault members at the ends is common to two consecutive sections, thereby straddling the connecting joint between the corresponding side members.

As mentioned above, at the interface of the vault members 5 ₁ , 5 ₂ and the side members 2, 2 ₁ , 2 ′ each joint 6 is formed of the respective vault member and side members. It is an articulated joint that extends the entire length of the corresponding edges. Each joint 6 includes a protruding round 10 which bears on the recess 11 as shown in FIG. 3. The protruding rounds 10 and the recesses 11 define a longitudinal articulation axis.

In the example shown, the protruding round portion 10 is made at each edge of each vault member 5 ₁ , 5 ₂ while the concave round portion 11 is formed on each side member 2, 2 ₁ and. 2 ') at the top. The opposite arrangement can also be derived under the condition that the two edges of the vault member preferably have the same arrangement for the symmetry in the force distribution.

Each intermediate member 2 ₁ is intended to receive the corresponding edges of the two vault members in a bearing engagement, so that the top of each intermediate member 2 ₁ has a respective joint ( It is noteworthy that the corresponding portions of 6) are Y-shaped or triangles with points at the bottom, with two branches 12, 13 at the ends being manufactured. Thus, in the example shown, each branch 12, 13 has a concave round portion 11 intended to receive the protruding round portion 10 of the corresponding vault member as shown in FIG. 4.

In the case of using the tubular structure of the present invention in an area at risk of some earthquake, paraseismic locking means 15 at the jointed joints 6, as shown in Figs. ) Can be derived to prevent the occurrence of structural obstacles in the tubular structure 1 of the present invention caused by the earth's fines.

In the example shown, the seismic protection locking means 15 has at least one and preferably a plurality of tie-rods, in which only one is shown for each joint 6 in FIGS. 6 and 7. (16). Each tie-rod 16 connects the facing portions of the vault members 5 ₁ , 5 ₂ and the corresponding side members 2, 2 ₁ , 2 ′. Each tie-rod 16 is located in two channels 17 and 18 formed at respective corresponding edges of the side member and the vault member. Thereby, the channels 17 and 18 are opened opposite each other at the joint 6. The channels 17 and 18 are also open on the side facing the joint 6, each to allow for tightening of the tie-rods and compression of the corresponding knuckled joint 6. It opens to the chamber 19 which provides access to the corresponding head 20 of the tie-rod 16. In the example shown, the tie-rod 16 and the channels 17 and 18 are bent so that the tie-rod 7 passes through the joint connecting axis Δ of the joint 6. Of course, according to the invention, the channels can be made identical so that they are straight. It should be noted that the passage through the axis DELTA provides an improved distribution of the compressive forces on the opposite parts of the knuckled joint 6.

According to the invention, the seismic protection locking means 15 need not necessarily be in the form of tie-rods. 8 shows that the seismic protection locking means 15 is attached to the side members 2, 2 ₁ , 2 ′ and the corresponding vault members 5 ₁ and 5 ₂ , respectively, at each knot-connected joint 6. Another embodiment of the multi-conduit tubular structure of the present invention including two outer beads 22 and 25 is shown. Beads 22 and 25 extend beyond at least a portion of the length of the corresponding member. In the case of the side members, the beads 22 extend their entire length. Where the vault members are concerned, the beads 25 extend the entire length of the side intended for bearing engagement on the outer members 2, 2 ′. On the other hand, the beads 25 extend beyond just a portion of the length of the edge of the vault member intended to bear on the intermediate member. Beads 25 of the adjacent edges of the two juxtaposed vault members are offset in the longitudinal direction to prevent them from interfering with each other during assembly.

One of the beads, in this example shown, bead 22 attached to the side member is a longitudinal tongue 26 which engages with a corresponding groove 27 formed in the bead 25 attached to the vault member. ). The opposite arrangement is of course also derivable.

According to this example, the vault members 5 ₁ and 5 ₂ have at least one and preferably a plurality of transverse ribs 30 which increase its strength and which correspond to the vault member 5 ₁ . It should be noted that it is included in the lower surface of the. In particular the use of ribs 30 of this kind enables the production of tubular structures according to the invention with conduits having an open section of about 145 m ² or less.

The transverse ribs 30 are molded during the fabrication of the vaulted members so that they form an undeformable monobloc assembly with the vaulted members.

According to the examples described previously, the tubular structure of the invention comprises only two conduits. Nevertheless, as shown in FIG. 9, the tubular structure may include two or more conduits.

FIG. 9 thus shows the tubular structure 1 of the invention comprising _n conduits C ₁ , C ₂ ,... C _n . Each section is:

Two outer members 2 and 2 ' _n-1

n-1 intermediate members 2 ₁ to 2 _n-1

n vault members 5 ₁ to 5 _n and

n raft members 7 ₁ to 7 _n .

10 shows a modification of the tubular structure with n conduits without the use of a raft. In this example, the outer members 2 and 2 ′ comprise at their base 3 an inner flange 3 _i and an outer flange 3 _e which give their base a common T-shape. It imparts very good stability to each outer member 2, 2 'and absorbs the thrusts exerted by the vault members without the need to stay or backfill the outer members 2, 2'. The length of the outer flange 3 _e is preferably greater than the width of the inner flange 3 _i .

In the same way, the intermediate members 2 _e to 2 _n-1 have side flanges 3 _L having a width selected to ensure the stability of the intermediate member when only one vault member is holding on it. Have It should be noted that in the example shown the expanded base of the side members provides a better distribution of stresses exerted on the ground by the tubular structure of the invention covering it so that it can be derived that no backfill is used.

Of course, various other embodiments may be made for the tubular structure of the invention within the scope of the claims.

1 is a cross-sectional view of the tubular structure of the present invention with two conduits;

2 is a perspective view illustrating one embodiment of the tubular structure from FIG. 1;

FIG. 3 is a detailed view of III in FIG. 1 at a larger ratio; FIG.

FIG. 4 is a detailed view of the IV of FIG. 1 at a larger ratio; FIG.

5 is a cross-sectional view of another embodiment of the tubular structure of the present invention comprising two conduits and using seismic protection locking means;

FIG. 6 is a detailed view of the VI of FIG. 5 at a larger ratio; FIG.

FIG. 7 is a detail view of VII of FIG. 5 at a larger ratio; FIG.

8 is a cross-sectional view of the tubular structure of the present invention comprising two or more conduits;

9 is a cross-sectional view of a variant of the tubular structure of the present invention comprising two or more conduits; And,

10 is a cross-sectional view of a modification of the tubular structure with n conduits without the use of a raft.

Claims (15)

A tubular structure consisting of sections arranged in terminations seated on a horizontal and compacted laying surface S, said tubular structure comprising at least two juxtaposed conduits C ₁ , C _11. ) And each section, As the outer members 2, 2 ′ and at least one intermediate member 2 ₁ , each of which is supported on the laying surface S, each outer member 2, 2 ′ has its members at its base. A bottom plate 4 is provided comprising at least one flange 3i extending horizontally in the manner of a bracket from the side wall 20 of (2, 2 '), and two adjacent side members are provided with conduits C ₁ ,. Two outer members 2, 2 ′ and at least one intermediate member 2 ₁ defining a range of C ₂ , C ₁₁ ; And At least two vault members seating at each joint 6 of the upper edges of the two adjacent side members 2, 2 ₁ , 2 ′ to close the corresponding conduits C ₁ , C _{2 at} the top. Tubular structure, characterized in that it comprises (5 ₁ , 5 ₂ ). The method of claim 1, Each outer member 2, 2 ′ has an inner flange 3 _i and an outer flange 3 extending horizontally in the manner of a bracket at its base and on both sides of the member 2, 2 ′. An expanded bottom plate 4 is provided comprising _e ) and the outer flange 3 _e of the bearing bottom plate 7 of each side member 2, 2 ′ is applied to the bottom plate 7. A tubular structure characterized in that it extends beyond a width sufficient to ensure the stability of the member (2, 2 ') against the propulsion of the side applied by the vault member (3). The method of claim 2, The outer flange (3 _e ) is a tubular structure, characterized in that it has a width (3 _i ) greater than the width (a ₁ ) of the inner flange (3 _i ). The method of claim 1, Each intermediate member 2 ₁ has an extended base comprising two flanges 3 _L horizontally extending in the manner of a bracket at its base and on both sides of the members 2, 2 ′. Tubular structure, characterized in that the bottom plate (△) is provided. The method of claim 4, wherein The flanges 3 _L of the bearing bottom plate 4 of each intermediate member 2 ₁ are of the side applied by the single vault member 3 assuming the forces applied to the bottom plate 4. A tubular structure characterized in that it extends beyond a width sufficient to ensure the stability of the intermediate member (2 ₁ ) against propulsion. The method of claim 1, The joint 6 between each vault member and each side member 2, 2 ′, 2 ₁ is articulated and concave to define a longitudinal articulation axis Δ. Tubular structure, characterized in that it comprises a protruding round portion (10) to bear on the round portion (11). The method of claim 6, Tubular structure characterized in that at each node-joined joint (6), it comprises paraseismic locking means (15) for locking the movement of the node-joined joint (6). The method of claim 7, wherein The seismic protection means comprises two exterior beads 22, 25 attached to the side members 2, 2 'and the vault member 3, respectively, one bead 25 A tubular structure characterized in that it defines a longitudinal groove (27) that engages a longitudinal tongue (26) formed by another bead (22). The method of claim 7, wherein The seismic protection locking means 15 includes at least one tie-rod 16 connecting the facing portions of the vault member 3 and the side or middle side members 2, 2 ', the tie The rod (16) is characterized in that it extends in two opposing channels (17 and 18) formed in the vault member (3) and the side member (2, 2 '). The method of claim 9, The tie-rod (16) and the channels (17 and 18) are characterized in that the tie-rod (6) is curved such that it passes through the longitudinal knuckle connecting axis (Δ) of the joint (6). The method of claim 1, Tubular structure characterized in that each vault member (5 ₁ , 5 _n ) comprises at least one transverse stiffener rib (30) on the inner surface of the vault member (5 _n ). The method of claim 11, Each transverse rib (30) is a tubular structure, characterized in that together with the vault member (5 _n ) forms an undeformed monoblock assembly molded into one piece from reinforced or compressive stressed concrete. The method of claim 1, Each conduit section is characterized in that it is closed by a raft member (7 _n ) extending between the bottoms of the two side members (2, 2 ′, 2 ₁ ) of the corresponding conduit at the bottom. The method of claim 13, Tubular structure, characterized in that each raft member 7 _n consists of a prefabricated member. The method of claim 13, The raft (7 _n ) of each section of the conduit is characterized in that the tubular structure is produced or injected in place.

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