WO2020021390A1 - Ensemble d'équipement - Google Patents

Ensemble d'équipement Download PDF

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Publication number
WO2020021390A1
WO2020021390A1 PCT/IB2019/056096 IB2019056096W WO2020021390A1 WO 2020021390 A1 WO2020021390 A1 WO 2020021390A1 IB 2019056096 W IB2019056096 W IB 2019056096W WO 2020021390 A1 WO2020021390 A1 WO 2020021390A1
Authority
WO
WIPO (PCT)
Prior art keywords
main
tunnel
equipment assembly
accordance
centerings
Prior art date
Application number
PCT/IB2019/056096
Other languages
English (en)
Inventor
Elio GUERINI
Original Assignee
Vexa S.R.L.
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 Vexa S.R.L. filed Critical Vexa S.R.L.
Priority to EP19748604.6A priority Critical patent/EP3830393A1/fr
Publication of WO2020021390A1 publication Critical patent/WO2020021390A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/008—Driving transverse tunnels starting from existing tunnels
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E21D11/24—Knuckle joints or links between arch members
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries

Definitions

  • the present invention concerns an equipment assembly, a trailer for the transport and positioning of said equipment assembly, an operating system comprising said equipment assembly and said trailer, and a method for the construction of a by-pass tunnel.
  • the field of application wherein the present invention is placed is the construction of a "major civil work”, such as the construction of a tunnel for connecting a section of a road or railway.
  • the present invention is part of a specific phase in the construction of a civil work that provides for the construction of "twin tunnels", which extend in length parallel to each other, wherein in each respective tunnel there will be a respective direction of travel by road or rail.
  • the present invention is part of the construction phase of a by-pass tunnel necessary to connect the two twin tunnels.
  • it is known to put the two tunnels in communication approximately every five hundred meters by means of said by-pass tunnels.
  • the longer the tunnels the greater the number of by-pass tunnels.
  • the time of construction of twin tunnels includes the time of construction of the main tunnels to which is added the time of construction of the by-pass tunnels.
  • the construction of the by-pass tunnels provides for a first moment wherein a special support structure is mounted on the side walls of the tunnel, and a second moment wherein the excavation operations of the by-pass tunnel are carried out through a special opening delimited by said support structure.
  • the object of the present invention is to provide an equipment assembly, a trailer for the transport and the positioning of said equipment assembly and an operating system comprising said equipment assembly and said trailer by which the aforesaid requirement is fully resolved.
  • this object is achieved by the equipment assembly claimed in claim 1, by the trailer claimed in claim 9 and by the operating system in accordance with claim 14.
  • this object is also achieved by a method for constructing a by-pass tunnel in accordance with claim 15.
  • the claims dependent thereon show preferred variant embodiments involving further advantageous aspects.
  • FIG. 1 and la illustrate two schematic views of two twin tunnels and their related by-pass tunnels along a longitudinal cross-sectional plane and a transverse cross-sectional plane;
  • FIGS 2a and 2b represent an operating system comprising an equipment assembly and a trailer, respectively, wherein the equipment assembly is in a closed configuration and in an open configuration;
  • FIGS. 3a, 3b, 3c and 3d show cross-sectional views in a closed configuration, a first intermediate configuration, a second intermediate configuration and an open configuration of the operating system along a cross- sectional plane at a main centering;
  • FIGS. 4a, 4b, 4c and 4d illustrate cross-sectional views in a closed configuration, a first intermediate configuration, a second intermediate configuration and an open configuration of the operating system along a cross- sectional plane at an intermediate centering.
  • an equipment assembly in accordance with the present invention is indicated at reference number 1.
  • a trailer for transporting and positioning the equipment assembly 1 is indicated at reference number 700.
  • a tunnel wherein the equipment assembly 1 is intended to be positioned and is intended to operate is further indicated at number 900.
  • the tunnel 900 extends along a tunnel axis Z-Z, which is the axis along which the mole excavates.
  • the reference number 950 indicates the vault of the tunnel 950 defined by side walls 955 having a circumferential extension with respect to said tunnel axis Z-Z.
  • the vault 950 corresponds to the segmental liner of the tunnel 900.
  • the by-pass tunnel is indicated at the reference number 990. Said by-pass tunnel extends along the transverse axis Y-Y connecting two twin tunnels 900.
  • the equipment assembly 1 of the present invention extends along a main axis X-X. Said main axis X-X corresponds to the tunnel axis Z-Z when the equipment assembly 1 is inside the tunnel 900.
  • the equipment assembly 1 comprises a plurality of longitudinal members 2 that extend parallel to the main axis X-X and are suitable to engage the side walls 955 of the tunnel 900 parallel to said main axis X-X.
  • the longitudinal members 2 are suitable to extend along the tunnel 900.
  • the longitudinal members 2 have an open section, preferably the longitudinal members have an I-profile.
  • the equipment assembly 1 comprises a plurality of longitudinal members 2, spaced angularly from each other.
  • the equipment assembly 1 comprises four longitudinal members 2. In other embodiments, the equipment assembly 1 comprises a greater number of longitudinal members.
  • the equipment assembly 1 also comprises a plurality of centerings 3 that is positionable in an open configuration wherein they extend circumferentially with respect to the main axis X-X, connecting the longitudinal members 2 to each other.
  • the centerings 3 extend in a circumferential direction, along the entire circumference or along a single circumferential arc, to execute an action of engagement of the side wall 955 in a radial direction.
  • the centerings 3 engage the plurality of longitudinal members 2 in the circumferential direction, connecting them to each other.
  • the number of centerings 3 is variable.
  • embodiments are provided comprising a plurality of centerings 3, axially spaced from each other with respect to the main axis X-X.
  • the equipment assembly 1 comprises at least two main centerings 30 respectively at the two axial ends.
  • the equipment assembly 1 comprises at least two main centerings 30 for each axial end.
  • the main centerings 30, in an open configuration of the equipment assembly 1 extend entirely around the main axis X-X to engage the side wall 955 at 360°.
  • the main centerings 30, in the open configuration are annular, or O-shaped.
  • the equipment assembly 1 comprises at least one intermediate centering 35 positioned axially between the main centerings 30.
  • the equipment assembly 1 comprises at least two intermediate centerings 35.
  • the intermediate centerings 35 in an open configuration of the equipment assembly 1, extend around the main axis X-X for a circumferential arc.
  • the intermediate centerings 35 in open configuration have the shape of a circular segment with a base defining on said base a work opening 9 wherein the side wall 955 is accessible for the execution of the construction operations of a by-pass tunnel 990.
  • the intermediate centerings 35 extend along a circumferential arc of approximately 270°.
  • an intermediate centering 35, in the open configuration has an open, or C-shaped.
  • each centering is made up of a plurality of arch-shaped girder elements, respectively hinged to each other so as to be movable in rotation to be positionable along the circumferential direction.
  • Each girder element has, between one end and the other, a box-shaped cross section, preferably a square shaped cross section.
  • hinge portions which allow the mutual engagement are obtained on the ends .
  • the girder elements are characterized by uniform inertia.
  • the girder elements have high inertia, for example compared to the inertia of open section girder elements.
  • each main centering 30 comprises main girder elements 300 having an arched shape, mutually hinged to each other in such a way that they are positionable in mutual rotation in the shape of a circular segment on a base comprising a main tail end 301 and a main head end 302.
  • said main girder elements 300 are positionable, guiding their respective relative rotation, in the C-shaped tunnel 900.
  • each main centering 30 comprises an auxiliary girder element 300' engageable on the main tail end 301 and the main head end 302, so that the positioning of the main girder elements 300 and the engagement with the auxiliary girder element 300' make up the main circular-shaped centering 30 suitable to engage circularly the entire side wall 955.
  • the auxiliary girder element 300' is suitable to close the "base" of the circular segment at a base along which the main girder elements 300 extend in an open configuration.
  • the main girder elements 300 of each main centering 30 comprise a first main girder element 300a connecting two longitudinal members 2 and second main girder elements 300b positioned hinged at the ends of the first main girder element 300a and movable in rotation with respect thereto.
  • said first main girder element 300a is suitable to be positionable on the side wall 955 while the second main girder elements 300b are movable in rotation therefrom.
  • each main centering 30 comprises handling members 30m suitable to carry out an action of opening/closing in rotation between some main girder elements 300.
  • the handling members 30m comprise a hydraulic piston handling device having the ends connected to two consecutive main girder elements 300.
  • each auxiliary girder element 300' comprises a thrust member 300s' suitable to carry out a thrust action in a circumferential direction between the main tail end 301 and the main head end 302 to adjust and ensure the action of circumferential engagement of the respective main centering 30 with the side wall.
  • the thrust member 300s' carries out an action by which the correct (i.e. perfectly circumferential) engagement of the main centering 30 is achieved with the side wall portion 955. Due to the thrust member 300s', any dimensional discrepancies between the side wall 955 and the main centering 30 are recovered .
  • each thrust member 300s' is suitable to carry out a different thrust action depending on the needs of the respective main centering 30 and depending on the shape of the corresponding side wall portion 955.
  • each thrust member 300s' comprises a thrust piston device preferably having one end that engages the tail end 301 or head end 302 while the other end engages the auxiliary girder element 300' .
  • the thrust member 300s' comprises a mechanical stop suitable to lock the position reached, keeping it fixed and constant over time. In this way, the circumferential thrust action of the main centering 30 is maintained over time, avoiding the need to keep the hydraulic thrust action of the thrust member 300s' constant.
  • said mechanical stop is a threaded ring operating on the rod of the piston thrust device, wherein the positioning of the threaded ring prevents further displacement of the rod.
  • the piston thrust device is sized so as to be suitable to withstand the action of the tunnel walls in the same way in which the girders are suitable for doing so.
  • the rod and liner of the piston thrust device are suitable to support the same effort as the other components.
  • each intermediate centering 35 comprises arch-shaped intermediate girder elements 350.
  • the intermediate girder elements 350 are mutually hinged together in such a way that they is positionable in mutual rotation in the shape of a circular segment on a base comprising an intermediate tail end 351 and an intermediate head end 352.
  • the intermediate girder elements 350 are positionable, guiding their respective relative rotation, in the C-shaped tunnel 900.
  • the intermediate girder elements 350 thus circularly engage a section of the side wall 955. Between the intermediate tail end 351 and the intermediate head end 352 is defined the work opening 9 wherein the side wall 955 is accessible for the execution of the operations for constructing a by-pass tunnel 990.
  • respective longitudinal members 2 are found at the intermediate tail end 351 and the intermediate head end 352.
  • the intermediate girder elements 350 of each intermediate centering 35 comprise a first intermediate girder element 350a connecting in turn said two longitudinal members 2 and second intermediate girder elements 350b positioned hinged to the ends of the first intermediate girder element 350a, movable in rotation with respect thereto.
  • said first intermediate girder element 350a is suitable to be positioned on the side wall 955, while the second intermediate elements 350b are movable in rotation starting therefrom.
  • each intermediate centering 35 comprises handling members 35m suitable to execute an action of opening/closing in rotation between some intermediate girder elements 350.
  • the handling members 35m comprise a hydraulic piston handling device with the ends connected to two consecutive intermediate girder elements 350.
  • each movement of the respective axially aligned components is carried out at the same time.
  • the rotary movements of the main girder elements of the main centerings and the intermediate girder elements of the intermediate centerings described above are carried out simultaneously in such a way as to induce a planar translation movement in the respective longitudinal members 2 connected axially by said centerings .
  • the aforesaid movements are all hydraulically controlled.
  • the subject of the present invention is also a trailer 700 suitable to transport and position the equipment assembly 1 described above.
  • the trailer 700 comprises a support structure 750 whereon the equipment assembly 1 is houseable in a closed configuration.
  • the trailer 700 comprises handling groups 755 housed on the support structure and suitable to allow the handling thereof in the tunnel 900.
  • said handling groups 755 comprise multidirectional wheel groups.
  • said handling groups 755 are drive groups.
  • said handling groups 755 are electrically driven, each controlled by a respective electric motor comprised in the respective handling group 755.
  • the drive groups are controllable remotely, for example they are telecontrolled.
  • the support structure 750 comprises two axially spaced portal elements 751, preferably in the shape of an inverted U.
  • the handling groups 755 are located at the feet of said portal elements 751.
  • said portal elements 751 define a region of passage at the center, wherein, for example, vehicles and people may pass.
  • the support structure 750 comprises a lattice girder frame 752 suitable to join the two portal elements.
  • the support structure is positioned in a high position, not occupying or occupying as little as possible the region of passage.
  • the first positioning operations of the equipment assembly 1 are also carried out .
  • the trailer 700 comprises, in effect, positioning means 780, preferably comprising a plurality of hydraulic piston positioning devices, is houseable on the support structure 750 and engaging the equipment system 1 to move the main centerings 30 and the intermediate centerings 35 between a closed configuration and an open configuration
  • the positioning means 780 are suitable to move the main girder elements 300 and the intermediate girder elements 350.
  • the positioning means 780 comprise axial handling members 780a suitable to guide axially, in a radial direction with respect to the main axis X-X, the first main girder elements 300a and the first intermediate girder elements 350a.
  • the positioning means 780 comprise rotary handling members 780b suitable to guide the second main girder elements 300b and the second intermediate girder elements 350b in rotation.
  • the positioning means 780 are suitable to execute a first action in a radial direction wherein the main centerings 30 and the intermediate centerings 35 are brought to engage the side walls 955 of the tunnel 900, and a second action wherein some main girder elements 300 and some intermediate girder elements 350 are moved in mutual rotation in such a way as to obtain the engagement of the main centerings 30 and the intermediate centerings 35 with the side wall 955 along a circular segment on a base.
  • the auxiliary girder elements 300' may be assembled to complete the main centerings 30.
  • said positioning means 780 comprise specific hydraulic positioning devices, for example comprising telescopic arms or piston elements specifically engaging their respective components.
  • the trailer 700 also comprises a vehicle-accessible element 790 for the passage of work vehicles.
  • the trailer 700 is suitable to transport and position also said vehicle-accessible element 790 in the tunnel 900; said vehicle-accessible element comprises, at its axial ends, two ramp elements, and a walkway joining them.
  • the work vehicles may pass, for example in a situation wherein the assembly equipment 1 is in an open configuration avoiding contact with the components of the assembly equipment 1 engaging the side walls 955.
  • the subject of the present invention is an operating system comprising a trailer 700 as described above and an equipment assembly 1 as described above.
  • the assembly equipment 1 is transported, moved and positioned within the tunnel 900.
  • the equipment assembly 1 is easily moved and configured in its open configuration wherein the construction operations of the by-pass tunnel 900 may be carried out through the work opening 9.
  • the present invention also concerns a method for the construction of a by-pass tunnel 990 for connecting two twin tunnels 900 comprising the step of excavating a by-pass tunnel 990 at the same time as the operations, along the tunnel axis Z-Z, for the execution of the tunnel 900.
  • the method comprises the steps of inserting in a tunnel 900 an equipment assembly 1, in accordance with that which is described above, configuring it in an open configuration engaging the side walls 955 of said tunnel 900 and carrying out the excavation operations through the work opening 9 defined by the equipment assembly 1 in its engagement of the side wall 955.
  • the equipment assembly is insertable into the tunnel and positionable in an open configuration of engagement of the tunnel vault with simple and intuitive operations.
  • the equipment assembly in the closed configuration is housed on the trailer and is easily transportable .
  • the equipment assembly may be sized according to the size of the tunnel, however, advantageously, the operating principles described above are valid regardless of the size and measurements of the various components.
  • the equipment assembly remedies the need to mount special scaffolding or framing to be positioned in the tunnel.
  • the vault of the tunnel remains substantially intact and is not damaged: unlike what happens with the equipment of the state of the art that is in effect flanged and fixed to the wall of the tunnel by means of special pins inserted in the liner.
  • the equipment assembly is removable from the tunnel walls (i.e. it may be configured in a closed position) for reuse.
  • the equipment assembly may be used along the same tunnel for the construction of subsequent by-pass tunnels.
  • the equipment assembly has a positioning time (assembly) that is much shorter than the positioning time (assembly) of the equipment in the state of the art .
  • the box-shaped girder elements ensure a high inertia of said components combined with great lightness relative to girder elements of equal inertia .
  • the thrust member is suitable to carry out a thrust action suitable to ensure over time the burden of the action of the weight force supported by the tunnel walls (even during drilling operations of the by-pass tunnel) .
  • the open configuration of the equipment assembly is maintained mechanically; in other words, the open configuration of the equipment assembly is maintained safely over time.
  • the trailer comprises all the components and related systems that guide the handling of the equipment .

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Threshing Machine Elements (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention concerne un ensemble d'équipement (1), lequel ensemble est approprié pour venir en prise avec une voûte (950) d'un tunnel (900). L'ensemble d'équipement (1) s'étend le long d'un axe principal (X-X) comprenant une pluralité d'éléments longitudinaux (2) et une pluralité de centrages (3) pouvant être positionnés sous une configuration ouverte dans laquelle ils s'étendent de manière périphérique par la liaison des éléments longitudinaux (2) et la mise en prise avec la voûte (950). Les centrages (3) comprennent des centrages principaux (30) positionnés aux extrémités axiales de l'ensemble d'équipement (1), chacun comprenant des éléments de poutre principaux (300), articulés entre eux de manière à pouvoir être positionnés sous la forme d'un segment circulaire sur une base, et un élément de poutre auxiliaire (300'), de telle sorte que le positionnement des éléments de poutre principaux (300) et la mise en prise avec l'élément de poutre auxiliaire (300') constituent le centrage principal de forme circulaire (30). Les centrages (3) comprennent des centrages intermédiaires (35) positionnés de façon axiale entre les axes principaux (30), chaque centrage intermédiaire (35) comprenant des éléments de poutre intermédiaires (350) mutuellement articulés de telle sorte qu'ils peuvent être positionnés sous la forme d'un segment circulaire sur une base de façon à venir en prise de manière circulaire avec une section de la paroi latérale (955), définissant une ouverture de travail (9), la paroi latérale (955) étant accessible pour l'exécution des opérations pour la construction d'un tunnel de dérivation (990).
PCT/IB2019/056096 2018-07-27 2019-07-17 Ensemble d'équipement WO2020021390A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19748604.6A EP3830393A1 (fr) 2018-07-27 2019-07-17 Ensemble d'équipement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000007585 2018-07-27
IT102018000007585A IT201800007585A1 (it) 2018-07-27 2018-07-27 Assieme attrezzatura

Publications (1)

Publication Number Publication Date
WO2020021390A1 true WO2020021390A1 (fr) 2020-01-30

Family

ID=63965821

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/056096 WO2020021390A1 (fr) 2018-07-27 2019-07-17 Ensemble d'équipement

Country Status (3)

Country Link
EP (1) EP3830393A1 (fr)
IT (1) IT201800007585A1 (fr)
WO (1) WO2020021390A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113503174A (zh) * 2021-05-31 2021-10-15 中铁工程服务有限公司 一种山岭隧道二衬钢筋精准装配设备及施工方法
CN113697413A (zh) * 2021-09-14 2021-11-26 中铁工程装备集团有限公司 运输转移装置
IT202100028355A1 (it) * 2021-11-02 2023-05-02 Officine Maccaferri Italia S R L Centina perfezionata per il sostegno e consolidamento di uno scavo, e metodo per l'installazione di un tale centina all'interno di uno scavo

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136650A1 (fr) * 2000-03-24 2001-09-26 MECSIDER S.p.A. Chariot ajustable en taille pour coffrage de tunnel
JP2009121158A (ja) * 2007-11-16 2009-06-04 Shimizu Corp トンネル拡張用掘削装置
WO2015087311A2 (fr) * 2013-12-13 2015-06-18 Sws Engineering S.P.A. Procédures pour la construction d'infrastructures de transport souterraines
WO2015186029A2 (fr) * 2014-06-04 2015-12-10 Elas Geotecnica S.R.L. Dispositif de raccordement d'éléments structuraux de nervures et de structures réticulaires
EP3225778A1 (fr) * 2016-03-23 2017-10-04 CP Technology S.r.l. Appareil pour positionner un cadre de soutènement dans un tunnel
WO2018082714A1 (fr) * 2016-11-07 2018-05-11 中铁工程装备集团有限公司 Machine de percement à bouclier pour une galerie de liaison de tunnels et procédé de percement de galerie de liaison associé

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136650A1 (fr) * 2000-03-24 2001-09-26 MECSIDER S.p.A. Chariot ajustable en taille pour coffrage de tunnel
JP2009121158A (ja) * 2007-11-16 2009-06-04 Shimizu Corp トンネル拡張用掘削装置
WO2015087311A2 (fr) * 2013-12-13 2015-06-18 Sws Engineering S.P.A. Procédures pour la construction d'infrastructures de transport souterraines
WO2015186029A2 (fr) * 2014-06-04 2015-12-10 Elas Geotecnica S.R.L. Dispositif de raccordement d'éléments structuraux de nervures et de structures réticulaires
EP3225778A1 (fr) * 2016-03-23 2017-10-04 CP Technology S.r.l. Appareil pour positionner un cadre de soutènement dans un tunnel
WO2018082714A1 (fr) * 2016-11-07 2018-05-11 中铁工程装备集团有限公司 Machine de percement à bouclier pour une galerie de liaison de tunnels et procédé de percement de galerie de liaison associé

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113503174A (zh) * 2021-05-31 2021-10-15 中铁工程服务有限公司 一种山岭隧道二衬钢筋精准装配设备及施工方法
CN113503174B (zh) * 2021-05-31 2023-11-10 中铁工程服务有限公司 一种山岭隧道二衬钢筋精准装配设备及施工方法
CN113697413A (zh) * 2021-09-14 2021-11-26 中铁工程装备集团有限公司 运输转移装置
CN113697413B (zh) * 2021-09-14 2023-03-14 中铁工程装备集团有限公司 运输转移装置
IT202100028355A1 (it) * 2021-11-02 2023-05-02 Officine Maccaferri Italia S R L Centina perfezionata per il sostegno e consolidamento di uno scavo, e metodo per l'installazione di un tale centina all'interno di uno scavo

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Publication number Publication date
IT201800007585A1 (it) 2020-01-27
EP3830393A1 (fr) 2021-06-09

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