US3545213A - Structure for lining underground spaces - Google Patents
Structure for lining underground spaces Download PDFInfo
- Publication number
- US3545213A US3545213A US720235A US3545213DA US3545213A US 3545213 A US3545213 A US 3545213A US 720235 A US720235 A US 720235A US 3545213D A US3545213D A US 3545213DA US 3545213 A US3545213 A US 3545213A
- Authority
- US
- United States
- Prior art keywords
- layer
- concrete
- layers
- lining
- elastic
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 239000010410 layer Substances 0.000 description 85
- 239000004567 concrete Substances 0.000 description 33
- 239000011387 rubberized asphalt concrete Substances 0.000 description 12
- 238000009412 basement excavation Methods 0.000 description 10
- 230000002787 reinforcement Effects 0.000 description 8
- 239000011378 shotcrete Substances 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 230000001788 irregular Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- ZBMRKNMTMPPMMK-UHFFFAOYSA-N 2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid;azane Chemical compound [NH4+].CP(O)(=O)CCC(N)C([O-])=O ZBMRKNMTMPPMMK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
- E21D11/04—Lining with building materials
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Definitions
- the structure engages the underground surface which defines the underground space and includes a number of layers made up of elastic and concrete layers which engage each other.
- the elastic layers are preferably asphalt rubber while the concrete layers are preferably Gunite, and they are alternately arranged in engagement with each other to form a strong elastic multilayer crust body.
- the present invention relates to structures for lining underground spaces.
- the present invention relates to lining structures for reinforcing underground installations, particularly by providing a strong lining for an underground surface which defines an underground space.
- Structures of this type have been used, for example in tunnels or mine galleries, and the lining structures can extend horizontally, or they may be inclined or even vertical. In general such structures are intended to distribute uniformly the pressure of the ground which surrounds the underground space.
- Gunite which forms a concrete which can be delivered in uent form to the required location where it sets.
- this particular type of reinforcement enables an exceedingly good bond to be achieved with rock in the event that the excavation surface is formed of rock.
- the space of the excavation is used in this case to the maximum extent, the air resistance is reduced, and the possibility of settling of harmful dust is also reduced.
- a reinforcement of this type has refractory properties.
- Such Gunite reinforcing structures have also been used in combination with reinforcements for roof bolts.
- the structure for lining the underground space includes a number of layers made of elastic and concrete layers engaging each other. These layers alternate with each other so that except for the innermost and outermost layers, each elastic layer is sandwiched between a pair of concrete layers and each concrete layer is sandwiched between a pair of elastic layers.
- the innermost layer can take the form of a concrete layer, while the outermost layer can be either elastic or concrete, the thickness of the several layers and the choice as to whether the outer layer is elastic or concrete depending upon the particular conditions which are encountered in the underground cavity.
- FIG. 1 is a schematic transverse section of a lining structure of the invention which in the illustrated example is composed of cylindrical layers;
- FIG. 2 is a partial section on an enlarged scale of the structure illustrated in FIG. 1.
- the structure illustrated in the drawing forms a lining structure for an underground space which may be any tunnel, pit, well, mine gallery, etc., such excavations in general having either a circular or an elliptical cross section-
- the outermost layer 2 is an elastic insulating layer applied directly against the surface of the excavation which is, in the illustrated example, formed in rock 1, and preferably the elastic layer 2 is made of asphalt rubber.
- the thickness of the layer 2 and of the subsequent layers described below will be determined by the geological structure of the rock where the excavation is situated.
- the outermost layer 2 will constitute an elastic base for the next layer, which is a layer of concrete, this latter layer preferably being a layer 3 of Gunite.
- the outer elastic Vlayer 2 also seals the concrete layer 3 so as to protect it against water or other fiuids which might attack the concrete, and in addition the interior space is sealed so that gases will not escape therefrom into the ground.
- the elastic insulating layer 2 which is preferably of asphalt rubber
- the layer 3 has a uniform thickness along its entire circumferential prole, so that the entire wall which forms the layer 3 is of a uniform thickness.
- the prole of the underground excavation is of a different shape, which is not circular as illustrated, then the thickness of the concrete can be varied so as to be adapted to the individual pressure conditions which may be encountered at different parts of the excavation.
- this first concrete layer 3 has set and hardened, there is applied to the exposed inner surface of this layer a second elastic insulating layer 21, which also is preferably of asphalt rubber and which serves to provide a uniform transmission of pressure, particularly in the case of irregular loads, over the maximum possible area of the next load-carrying layer 31, which is also of concrete.
- this next layer 31 will be placed against the exposed inner surface of the second elastic layer 21.
- this second elastic insulating layer 21 eliminates undesirable stresses derived4 from the first load-carrying layer 3 of concrete, particularly bending stresses, and at the same time tangential tensions are also eliminated.
- the second concrete layer 31 is made in the same manner as the first layer 3.
- this second layer 31 has set and hardened, there is applied to its exposed inner surface a third insulating layer 22 also preferably made of asphalt rubber.
- the purpose of this third elastic layer is to further transmit the pressure and to protect the reinforcing lining against undesirable effects of aggressive uids.
- this third elastic insulating layer 22 has applied to its inner surface the innermost concrete layer 32 illustrated in the drawing, so that with the structure of the invention as illustrated in the drawing the outermost layer is elastic, the innermost layer is concrete, and except for these outermost and innermost layers, each elastic layer is sandwiched between a pair of concrete layers and each concrete layer is sandwiched between a pair of elastic layers.
- the innermost layer it is also possible to use a layer of a different material to form the inner protective layer of the lining structure of the invention.
- the number and sequence of the elastic and concrete layers, with the latter being made of Gunite with a suitable plastic addition, can be modified in accordance with the pressure conditions of the rock. While the outermost layer is shown in the illustrated example as being elastic, in many cases it may be preferable to provide an outermost layer of concrete, particularly where it will form a good bond with rock so as to give in this way an outer equalizer layer for the lining structure of Thus, by bonding together the several layers of the linthe invention.
- the reinforcing structure of the invention has highly advantageous elastic properties, and particularly where the elastic layers are made of asphalt rubber the concrete is very reliably protected against liquids or other fluids which might otherwise attack the concrete, and in addition the lining structure of the invention is -both gas-proof and water-proof.
- the structure of the invention can be used in the building industry as inserts, particularly where the Gunite is combined with elastic insulating layers of asphalt rubber, this construction being especially suitable in those cases where there is a danger of movement of the foundation of a structure or where it is required to create an exceedingly heavy insulation and to provide protection against mechanical damage.
- the structure of the invention is particularly suitable in all cases where it is required to equalize irregular loads and to provide protection against uids such as streaming liquids or gases which might otherwise attack the structure.
- a structure for lining a surface which defines at least part of an underground space comprising a plurality of layers of asphalt rubber and layers of concrete engaging each other including an outer ground-engaging layer directly engaging said surface which defines at least part of said underground space, and an inner layer of material different from said outer layer having an inner exposed surface directed toward the interior of said space, said layers including, except for said outer and inner layers, at least one layer of concrete sandwiched between a pair of layers of asphalt rubber, and at least one layer of asphalt rubber sandwiched between a pair of layers of concrete.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS211567 | 1967-03-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3545213A true US3545213A (en) | 1970-12-08 |
Family
ID=5357306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US720235A Expired - Lifetime US3545213A (en) | 1967-03-22 | 1968-04-10 | Structure for lining underground spaces |
Country Status (9)
Country | Link |
---|---|
US (1) | US3545213A (zh) |
BE (1) | BE712437A (zh) |
CH (1) | CH499690A (zh) |
DE (1) | DE1758013B1 (zh) |
ES (1) | ES351846A1 (zh) |
FR (1) | FR1557434A (zh) |
GB (1) | GB1209329A (zh) |
NL (1) | NL6804108A (zh) |
SE (1) | SE329412B (zh) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3698066A (en) * | 1970-12-21 | 1972-10-17 | Jennings Bailey Jr | Method of producing tunnel or like structure |
US4695188A (en) * | 1984-03-13 | 1987-09-22 | Neste Oy | Lined rock cistern or tunnel |
US4915545A (en) * | 1988-01-29 | 1990-04-10 | Nino Ferrari USA Inc. | Large sized underground storage tank with structural stability |
US4934122A (en) * | 1986-12-01 | 1990-06-19 | Convault, Inc. | Storage vault and method |
US5157888A (en) * | 1986-12-01 | 1992-10-27 | Convault, Inc. | Storage vault and method for manufacture |
US5174079A (en) * | 1986-12-01 | 1992-12-29 | Convault, Inc. | Fluid containment vault with homogeneous concrete-entombed tank |
US5234191A (en) * | 1986-12-01 | 1993-08-10 | Convault, Inc. | Apparatus for forming a fluid containment vault |
US5261766A (en) * | 1991-09-06 | 1993-11-16 | Anderson James S | Vertical bore hole system and method for waste storage and energy recovery |
US5439319A (en) * | 1993-08-12 | 1995-08-08 | Carlisle Coatings & Water Proofing, Incorporated | Tunnel barrier system and method of installing the same |
US5495695A (en) * | 1993-01-21 | 1996-03-05 | Dalworth Concrete Products, Inc. | Vaulted underground storage tank |
US5778608A (en) * | 1995-01-31 | 1998-07-14 | Dalworth Concrete Products, Inc. | Vaulted underground storage tank |
US6193439B1 (en) * | 1996-01-08 | 2001-02-27 | Mbt Holding Ag | Process for cladding substrates and constructions produced thereby |
WO2001096709A1 (en) * | 2000-06-12 | 2001-12-20 | W.R. Grace & Co.-Conn. | A tunnel waterproofing method |
US6761504B1 (en) * | 1998-07-20 | 2004-07-13 | Mbt Holding Ag | Waterproof cladding construction and method of providing the same |
US6767164B2 (en) | 2000-06-12 | 2004-07-27 | W. R. Grace & Co.-Conn. | Tunnel waterproofing construction method |
US6793441B2 (en) | 2000-06-12 | 2004-09-21 | W. R. Grace & Co.-Conn. | Tunnel waterproofing method |
EP1290313A4 (en) * | 2000-06-12 | 2005-04-27 | Grace W R & Co | METHOD FOR CONSTRUCTING TUNNEL SEALING |
CN103924987A (zh) * | 2014-04-24 | 2014-07-16 | 中铁十一局集团城市轨道工程有限公司 | 一种smw工法桩盾构洞门防渗水结构及其施工方法 |
CN104373138A (zh) * | 2014-10-13 | 2015-02-25 | 中南大学 | 一种隧道衬砌结构修复时防水层重塑的施工方法 |
US20160097278A1 (en) * | 2014-10-07 | 2016-04-07 | John Huh | Waterproofing system for exposed rock surfaces |
US20160326759A1 (en) * | 2015-05-08 | 2016-11-10 | John Huh | Restorative waterproofing membrane and method of forming the same |
US20170167261A1 (en) * | 2014-05-21 | 2017-06-15 | Constructions Mécaniques Consultants | Construction element for creating a tunnel, tunnel comprising such an element and methods for constructing such an element and such a tunnel |
US10519772B2 (en) * | 2015-04-03 | 2019-12-31 | Agence Nationale Pour La Gestion Des Dechets Radioactifs | Construction element for creating a tunnel, tunnel comprising such an element and methods for constructing such an element and such a tunnel |
US11572787B2 (en) * | 2018-04-10 | 2023-02-07 | S&P Clever Reinforcement Company Ag | Method for renovating, repairing, reinforcing, protecting or newly creating corrugated metal-sheet tunnels, and corrugated metal-sheet tunnels of this type |
US20230258085A1 (en) * | 2022-02-14 | 2023-08-17 | Shandong Jianzu University | Composite support system based on steel-concrete support and shotcrete arch and construction process thereof |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2523627A1 (fr) * | 1982-03-22 | 1983-09-23 | Campenon Bernard | Procede pour conforter des arches ou des constructions analogues |
DE3332242A1 (de) * | 1983-09-07 | 1985-03-28 | Dyckerhoff & Widmann AG, 8000 München | Roehrenfoermiger unterirdischer hohlraum, wie verkehrstunnel, rohrleitung oder dergleichen |
DE3407384A1 (de) * | 1983-09-07 | 1985-08-29 | Dyckerhoff & Widmann AG, 8000 München | Verfahren zum herstellen eines roehrenfoermigen unterirdischen hohlraums, z.b. eines verkehrstunnels, und vorrichtung zum durchfuehren des verfahrens |
DE3404111A1 (de) * | 1984-02-07 | 1985-08-14 | Bergwerksverband Gmbh, 4300 Essen | Verfahren zur herstellung und zum ausbau von nicht begehbaren langgestreckten hohlraeumen in geschlossener bauweise |
NL191096C (nl) * | 1984-02-29 | 1995-01-16 | Dyckerhoff & Widmann Ag | Pijpvormige ondergrondse holle ruimte. |
DE4133577A1 (de) * | 1991-10-10 | 1992-06-17 | Gbm Ges Fuer Baugeologie Und M | Ausbau dynamisch beanspruchter untertaegiger hohlraeume mit daempfender zwischenschicht |
CN111287754A (zh) * | 2020-03-16 | 2020-06-16 | 华北电力大学 | 一种功能梯度混凝土复合井壁及制作方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2136390A (en) * | 1937-04-16 | 1938-11-15 | Raybestos Manhattan Inc | Liquid tank |
US3106227A (en) * | 1962-06-20 | 1963-10-08 | Crowley Hession Engineers | Foam insulated prestressed concrete wall |
US3111811A (en) * | 1956-12-15 | 1963-11-26 | Nederlanden Staat | Method for the construction of a tunnel or tunnel-part and a tunnel or tunnel-part obtained by pursuing said method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE283891C (zh) * | ||||
DE512630C (de) * | 1924-03-02 | 1930-11-13 | Siemens Bauunion G M B H Komm | Wasserdichte und druckfeste Stollenauskleidung |
DE526167C (de) * | 1924-05-24 | 1931-06-03 | A F Malchow Akt Ges | Verfahren zum Abdichten von Gebirgsstollen gegen Grundwasser |
GB864646A (en) * | 1956-12-15 | 1961-04-06 | Chief Engineer Director Of The | Improvements relating to the construction of tunnels or tunnel-parts |
DE1170351B (de) * | 1959-04-20 | 1964-05-21 | Bergwerksverband Gmbh | Verfahren zum Auskleiden von Grubenbauen mit einem filmbildenden Kunstharz |
DE1229962B (de) * | 1960-06-11 | 1966-12-08 | Bergwerksverband Gmbh | Verfahren zur Erhaltung der Anfangseigenschaften der Wandungen von Grubenbauen |
-
1968
- 1968-03-19 BE BE712437D patent/BE712437A/xx unknown
- 1968-03-19 CH CH403268A patent/CH499690A/de not_active IP Right Cessation
- 1968-03-20 GB GB03518/68A patent/GB1209329A/en not_active Expired
- 1968-03-20 DE DE19681758013 patent/DE1758013B1/de not_active Withdrawn
- 1968-03-21 ES ES351846A patent/ES351846A1/es not_active Expired
- 1968-03-22 SE SE03844/68A patent/SE329412B/xx unknown
- 1968-03-22 FR FR1557434D patent/FR1557434A/fr not_active Expired
- 1968-03-22 NL NL6804108A patent/NL6804108A/xx unknown
- 1968-04-10 US US720235A patent/US3545213A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2136390A (en) * | 1937-04-16 | 1938-11-15 | Raybestos Manhattan Inc | Liquid tank |
US3111811A (en) * | 1956-12-15 | 1963-11-26 | Nederlanden Staat | Method for the construction of a tunnel or tunnel-part and a tunnel or tunnel-part obtained by pursuing said method |
US3106227A (en) * | 1962-06-20 | 1963-10-08 | Crowley Hession Engineers | Foam insulated prestressed concrete wall |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3698066A (en) * | 1970-12-21 | 1972-10-17 | Jennings Bailey Jr | Method of producing tunnel or like structure |
US4695188A (en) * | 1984-03-13 | 1987-09-22 | Neste Oy | Lined rock cistern or tunnel |
US5234191A (en) * | 1986-12-01 | 1993-08-10 | Convault, Inc. | Apparatus for forming a fluid containment vault |
US4934122A (en) * | 1986-12-01 | 1990-06-19 | Convault, Inc. | Storage vault and method |
US5157888A (en) * | 1986-12-01 | 1992-10-27 | Convault, Inc. | Storage vault and method for manufacture |
US5174079A (en) * | 1986-12-01 | 1992-12-29 | Convault, Inc. | Fluid containment vault with homogeneous concrete-entombed tank |
US4915545A (en) * | 1988-01-29 | 1990-04-10 | Nino Ferrari USA Inc. | Large sized underground storage tank with structural stability |
US5261766A (en) * | 1991-09-06 | 1993-11-16 | Anderson James S | Vertical bore hole system and method for waste storage and energy recovery |
US5495695A (en) * | 1993-01-21 | 1996-03-05 | Dalworth Concrete Products, Inc. | Vaulted underground storage tank |
US5439319A (en) * | 1993-08-12 | 1995-08-08 | Carlisle Coatings & Water Proofing, Incorporated | Tunnel barrier system and method of installing the same |
US5778608A (en) * | 1995-01-31 | 1998-07-14 | Dalworth Concrete Products, Inc. | Vaulted underground storage tank |
US6193439B1 (en) * | 1996-01-08 | 2001-02-27 | Mbt Holding Ag | Process for cladding substrates and constructions produced thereby |
US6761504B1 (en) * | 1998-07-20 | 2004-07-13 | Mbt Holding Ag | Waterproof cladding construction and method of providing the same |
US6793441B2 (en) | 2000-06-12 | 2004-09-21 | W. R. Grace & Co.-Conn. | Tunnel waterproofing method |
US6767164B2 (en) | 2000-06-12 | 2004-07-27 | W. R. Grace & Co.-Conn. | Tunnel waterproofing construction method |
WO2001096709A1 (en) * | 2000-06-12 | 2001-12-20 | W.R. Grace & Co.-Conn. | A tunnel waterproofing method |
EP1290313A4 (en) * | 2000-06-12 | 2005-04-27 | Grace W R & Co | METHOD FOR CONSTRUCTING TUNNEL SEALING |
EP1290312A4 (en) * | 2000-06-12 | 2005-05-04 | Grace W R & Co | METHOD FOR WATER SEALING TUNNELS |
AU2001272936B2 (en) * | 2000-06-12 | 2005-06-30 | W.R. Grace & Co.-Conn. | A tunnel waterproofing construction method |
CN1328475C (zh) * | 2000-06-12 | 2007-07-25 | 格雷斯公司 | 隧道防水方法 |
EP1290312A1 (en) * | 2000-06-12 | 2003-03-12 | W.R. Grace & Co.-Conn. | A tunnel waterproofing method |
CN103924987B (zh) * | 2014-04-24 | 2015-12-09 | 中铁十一局集团城市轨道工程有限公司 | 一种smw工法桩盾构洞门防渗水结构及其施工方法 |
CN103924987A (zh) * | 2014-04-24 | 2014-07-16 | 中铁十一局集团城市轨道工程有限公司 | 一种smw工法桩盾构洞门防渗水结构及其施工方法 |
US20170167261A1 (en) * | 2014-05-21 | 2017-06-15 | Constructions Mécaniques Consultants | Construction element for creating a tunnel, tunnel comprising such an element and methods for constructing such an element and such a tunnel |
US10774640B2 (en) * | 2014-05-21 | 2020-09-15 | Agence Nationale Pour La Gestion Des Dechets Radioactifs | Construction element for creating a tunnel, tunnel comprising such an element and methods for constructing such an element and such a tunnel |
US20160097278A1 (en) * | 2014-10-07 | 2016-04-07 | John Huh | Waterproofing system for exposed rock surfaces |
CN104373138A (zh) * | 2014-10-13 | 2015-02-25 | 中南大学 | 一种隧道衬砌结构修复时防水层重塑的施工方法 |
US10519772B2 (en) * | 2015-04-03 | 2019-12-31 | Agence Nationale Pour La Gestion Des Dechets Radioactifs | Construction element for creating a tunnel, tunnel comprising such an element and methods for constructing such an element and such a tunnel |
US20160326759A1 (en) * | 2015-05-08 | 2016-11-10 | John Huh | Restorative waterproofing membrane and method of forming the same |
US9725917B2 (en) * | 2015-05-08 | 2017-08-08 | John Huh | Restorative waterproofing membrane and method of forming the same |
US11572787B2 (en) * | 2018-04-10 | 2023-02-07 | S&P Clever Reinforcement Company Ag | Method for renovating, repairing, reinforcing, protecting or newly creating corrugated metal-sheet tunnels, and corrugated metal-sheet tunnels of this type |
US20230258085A1 (en) * | 2022-02-14 | 2023-08-17 | Shandong Jianzu University | Composite support system based on steel-concrete support and shotcrete arch and construction process thereof |
US11753936B2 (en) * | 2022-02-14 | 2023-09-12 | Shandong Jianzu University | Composite support system based on steel-concrete support and shotcrete arch and construction process thereof |
Also Published As
Publication number | Publication date |
---|---|
ES351846A1 (es) | 1969-06-16 |
DE1758013B1 (de) | 1971-11-11 |
GB1209329A (en) | 1970-10-21 |
FR1557434A (zh) | 1969-02-14 |
NL6804108A (zh) | 1968-09-23 |
CH499690A (de) | 1970-11-30 |
BE712437A (zh) | 1968-07-31 |
SE329412B (zh) | 1970-10-12 |
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