EP3317461A1 - Schutz - Google Patents

Schutz

Info

Publication number
EP3317461A1
EP3317461A1 EP16738873.5A EP16738873A EP3317461A1 EP 3317461 A1 EP3317461 A1 EP 3317461A1 EP 16738873 A EP16738873 A EP 16738873A EP 3317461 A1 EP3317461 A1 EP 3317461A1
Authority
EP
European Patent Office
Prior art keywords
thermal protection
layer
sheath
cylindrical
cable
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.)
Granted
Application number
EP16738873.5A
Other languages
English (en)
French (fr)
Other versions
EP3317461B1 (de
Inventor
Mark REBENTROST
Daniel Knight
Thorsten HAUK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VSL International Ltd
Original Assignee
VSL International Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=61767972&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3317461(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US14/945,146 external-priority patent/US10751968B2/en
Application filed by VSL International Ltd filed Critical VSL International Ltd
Priority claimed from PCT/IB2016/053919 external-priority patent/WO2017002056A1/en
Publication of EP3317461A1 publication Critical patent/EP3317461A1/de
Application granted granted Critical
Publication of EP3317461B1 publication Critical patent/EP3317461B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Definitions

  • encapsulation in bonded post-tensioning tendons tends to reduce the consequences of localised thermal loading on the high tensile steel tendon made of strands or wires due to the developed bond between the strands/wires and surrounding concrete.
  • the consequences of anchorage movement and relaxation on unbonded tendons tends to be more severe due to an overall loss of member integrity as the ability to transfer forces between the tendon and concrete through the developed grout bond is removed.
  • WO2012052796 provides a thermally insulating rigid tube arranged around a stay cable with a thermally insulating material having a minimum thickness requiring an air channel between the insulating tube and the cable and a significant height difference to achieve heat
  • said sandwich-like composite insulation system has a thermal conductivity at 800°C lower than or equal to 0.10 W/m.°C and preferably lower than or equal to 0.09 W/m.°C.
  • a thermal protection sheath forms a thin multi- layered composite construction developed for the extreme extended thermal protection of length of elongated structural elements, such as external post-tensioning cables, cable stays, roof suspension elements, steel profiles and pipe ends, and in particular post-tensioning tendons and cable stay end anchorages.
  • insulating layer are preferably inter-stitched, and are overlapped with respect to each other in order to provide extensive coverage of the protected system (elongated element such as a tensioned cable end anchorage) and increase overall system efficacy.
  • Each composite layer spans the circumference of the cylindrical protection cap and consists of various potential insulating materials, of low thermal conductivity, in order to provide both added strength and reduced thermal conduction.
  • the third layer comprises numerous thermal insulating materials of both the fibrous and porous types.
  • Fig. 1 A shows an isometric view of an embodiment of a section of a cylindrical thermal protection sheath according to the invention.
  • Fig. 1 B shows an isometric view of an alternative embodiment of the cylindrical thermal protection sheath of Fig. 1A
  • the first layer 10 can be omitted: this can
  • the second layer 12 forms the layer below the first layer 10 (or this second layer 12 constitutes a first outer layer when there is no layer 10).
  • the second layer 12 is covering the inner side surface of the first layer 10. This second layer 12 is placed directly against the inner side of the first layer 10.
  • the second layer 12 is bi-axially inter-stitched to the first layer 10 with stitching 14.
  • said fourth layer 18 comprises an envelope defining separate compartments filled with said micro-porous thermal insulation material.
  • said compartments are cross-stitched pockets of a predefined size based on the dimensional requirements of the thermal protection sheath 1.
  • said micro-porous thermal insulation material comprises a silica and/or calcium silicate and/or alumina silicate.
  • said micro-porous thermal insulation material comprises pyrogenic silica.
  • the cylindrical thermal protection sheath 1 and more generally the composite insulation system, also serves for protection against other thermal source such as environmental impacts: direct sunlight exposure, any change in ambient temperature from other sources than fire.
  • the composite insulation system forming the first portion 61 comprises four layers which are the second layer 12, the third layer 16, the fourth layer 18 and the fifth layer 20 as previously described. In that case, preferably, the first portion 61 is preferably covered by said outer cover 73.
  • the second portion 62 is an envelope surrounding a section of the cable 50 installed with the guide or damping means: the second portion 62 is dimensioned such that it does not impede the guide system 70. This is achieved by providing an annular space 62a between the inner face of the second portion 62 and the outer face of the guide system 70.
  • the second portion has a variable internal diameter increasing from the internal diameter of the first portion 61 (first diameter) to the internal diameter of the third portion 63 (third diameter).
  • the composite insulation system forming the second portion 62 comprises four layers which are the second layer 12, the third layer 16, the fourth layer 18 and the fifth layer 20 as previously described.
  • this third portion 63 can have a small or large length, ranging preferably up to 50 meters, and more preferably up to 20 meters and ranging preferably up to 10 meters, notably about from 1 to 10 meters. Important lengths are therefore achieved by subsequent connection of multiple portion units.
  • Such a configuration, and notably the flexibility of the sandwichlike composite insulation system and materials, allows a possible flexural deformation of the thermal protection sheath 60, and in particular its third portion 63 to follow the variation of sag of the cable 50 due to changes in axial cable force or changes of its deformed alignment due to changing lateral loads, such as wind drag forces, or due to vibrations caused by excitation of the cable due to wind effects or by excitation through coupling with vibrations of the structure caused by fluctuating loads or other external effects.
  • Additional flexural deformation of the sheath 60 can be achieved by providing flexible joints between individual elements of the third portion 63.
  • the composite insulation system according to the invention allows a thermal conductivity lower than or equal to 0.1 1 W/m.°C at 800°C for a thickness lower than 50 millimeters, and notably a thickness between 20 and 40 millimeters.
  • the composite insulation system according to the invention allows a thermal conductivity lower than or equal to 0.022 W/m.°C, lower than or equal to 0.02 W/m.°C and even lower than or equal to
  • D the smallest inner diameter of said sheath 60 (in m), W max in kg/m and Factor K between 20 to 30, preferably between 22 to 27, and which can be 25.
  • D corresponds also sensibly to the outer diameter of the cable 50 (see Fig. 6).
  • said sheath 60 (or sheath 1 ) can accommodate a transverse movement being equal to D, where D is the internal diameter of the sheath 60 (or of sheath 1 ), or D is the smallest internal diameter of the sheath.
  • the sheath 60 forms a thermal protection device 90 which, in terms of flexibility, can be defined as having a fixed part 91 (first portion 61 of the sheath), a flexible part 92 for transverse movement (second portion 62 of the sheath 60) and a flexible part 93 for bending.
  • Fig. 4 shows the end part of the anchorage 52 of the cable 50 located on the side of the concrete panel 51 opposite to the running part of the cable 50.
  • the end part of the anchorage 52 is fitted with an end cap 53 providing mechanical protection and sealing. This end cap 53 is comprised in the fixed part 91.
  • said cylindrical thermal protection cap 5 is used with a closure band 28 able to be strapped around the opening 8 of said cylindrical thermal protection cap 5.
  • Fig. 9 illustrates a removable band 28 that fills the void at the end of the thermal protection device post- installation. More precisely, the space formed between the open end of the sleeve (formed by the thermal composition system) and the extremities of the frame (connection elements 22) is closed post-installation with the closure band 28.
  • the third layer 16 and the fifth layer 20 form the composition of the removable band 28. 26 is an attachment means forming a connection detail such that the removable band 28 is held in place on the thermal protection cap 5 post-installation through
  • the thermal protection device for the end part of an elongated structural element comprises said cylindrical thermal protection cap 5, and preferably comprises further an insulation board 40 with a machined hole. Said insulation board 40 is able to be placed against the opening 8 of said cylindrical thermal protection cap 5, with the hole facing said opening 8.
  • an elongated structural device comprising an elongated structural element such as a tensioned cable 50 with at least one anchorage part 52 (including possibly two anchorage parts) at the end(s) of the cable 50, and at least one thermal protection sheath 60, wherein said cylindrical thermal protection sheath 60 covers a length of the cable 50 extending from the anchorage part 52.
  • an elongated structural element such as a tensioned cable 50 with at least one anchorage part 52 (including possibly two anchorage parts) at the end(s) of the cable 50, and at least one thermal protection sheath 60, wherein said cylindrical thermal protection sheath 60 covers a length of the cable 50 extending from the anchorage part 52.
  • first and second layers are stitched together.
  • first and second layers are stitched together as a pair.
  • the stitching between the first and second layers is bi-axially inter-stitched to form a robust outer envelope for the thermal protection cap.
  • said composite insulation system further comprises a fifth layer covering the inner side of the fourth layer.
  • this fifth layer is attached to the fourth layer.
  • this fifth layer comprises a structural layer.
  • said cylindrical thermal protection cap may further comprises a frame placed within said composite insulation system and attached to said composite insulation system.
  • the invention relates to the use of such a thermal protection cap for thermal protection of the end part of a post-tensioning cable anchorage or of a stay cable anchorage or of a ground anchor.
  • thermal protection cap in nuclear power plants. Given the importance of the pre-stressing cables for the overall structural safety of such containment structures, regular inspections or force measurements are often carried out requiring the removal of the thermal protection cap. Access to the location of the anchor elements is often difficult due to their height above ground or confined spaces. It is hence desirable for such thermal protection caps 5 to be light weight to allow their manual handling. In such cases the thermal protection cap is required for example to protect the anchorages against fires caused during maintenance interventions involving electrical equipment, welding or other heat sources which can develop quickly very high temperatures due to the confined conditions and the possible presence of hydrocarbons in the form of fuel, greases or other products used during maintenance interventions.
  • the thermal protection cap 5 covers an anchor element of a tensioned cable, or more generally an elongated tensile element, which's end part is embedded in soil and in a concrete element covering a portion of the soil.
  • This arrangement forms a ground anchor.
  • the ground anchor is on one end anchored in the soil or rock, for example by means of mechanical interlocking or bond through a cementitious injection, and its anchor element on the opposite end is resting against a concrete structure.
  • This arrangement allows to pre-stress the ground anchor against the structure and the movement of the structure is hence restrained and controlled by the introduced anchoring force. Due to the consolidation or movement of the soil such ground anchors require regular interventions at the anchor element for the purpose of inspection or measurement of remaining anchor force.
  • Attachment means (ribbon sections)

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Bridges Or Land Bridges (AREA)
  • Thermal Insulation (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Electronic Switches (AREA)
  • Magnetic Heads (AREA)
EP16738873.5A 2015-06-30 2016-06-30 Protektor Active EP3317461B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH9402015 2015-06-30
CH9412015 2015-06-30
US14/945,146 US10751968B2 (en) 2015-06-30 2015-11-18 Cylindrical thermal protection sheath
PCT/IB2016/053919 WO2017002056A1 (en) 2015-06-30 2016-06-30 Protector

Publications (2)

Publication Number Publication Date
EP3317461A1 true EP3317461A1 (de) 2018-05-09
EP3317461B1 EP3317461B1 (de) 2022-11-30

Family

ID=61767972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16738873.5A Active EP3317461B1 (de) 2015-06-30 2016-06-30 Protektor

Country Status (6)

Country Link
EP (1) EP3317461B1 (de)
JP (1) JP2018529858A (de)
CN (1) CN107889513B (de)
ES (1) ES2938233T3 (de)
HK (1) HK1249154A1 (de)
RU (1) RU2017140418A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109403204A (zh) * 2018-11-14 2019-03-01 中交第二航务工程局有限公司 适用于索结构体系的索管套、含有该索管套的多功能外套管和拉索结构
CN109944157A (zh) * 2019-03-18 2019-06-28 江阴法尔胜住电新材料有限公司 一种对斜拉索设置防火保护的装置及安装方法
CN112211790B (zh) * 2019-07-10 2022-12-27 北京金风科创风电设备有限公司 地锚装置、拉索塔架、风力发电机组以及施工方法
CN110904839A (zh) * 2019-12-12 2020-03-24 江苏法尔胜缆索有限公司 一种斜拉桥用防火烧、抗结冰耐久型拉索
CN112523085B (zh) * 2020-12-01 2022-08-16 柳州欧维姆机械股份有限公司 一种带有功能元件的拉索护套管及其施工方法
CN113605234B (zh) * 2021-08-31 2022-12-06 江苏中矿大正表面工程技术有限公司 一种用于桥梁斜拉索的防火外层隔离体系
CN217815712U (zh) * 2022-04-19 2022-11-15 宁德时代新能源科技股份有限公司 防护套管、电池热管理系统及电池

Family Cites Families (12)

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DE2928695C2 (de) 1979-07-16 1984-05-30 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Wärmeisolierkörper sowie Verfahren zu seiner Herstellung
DE29518473U1 (de) 1995-11-21 1996-01-25 Promat Gmbh Plattenförmiges Hochtemperatur-Wärmedämmelement
DE29600455U1 (de) 1996-01-12 1996-02-29 Foliplast Gmbh Wärmedämmendes Element für Körper, insbesondere für Warmwasserspeicher
CA2196366C (en) 1996-02-13 2004-12-14 John Thomas Hughes Flexible insulation panel and method of manufacture
DE19750564A1 (de) 1997-11-14 1999-05-20 Missel Gmbh & Co E Dämmaterial
DE102004018040A1 (de) 2004-04-08 2005-11-03 Steinbrunn, Marc Boris, Dr. Dämmaterial mit integrierter Schutzummantelung
FR2897623B1 (fr) 2006-02-17 2008-04-11 Eiffage Tp Sa Dispositif de protection au feu d'un cable ou analogue d'ouvrage d'art ou de genie civil
FR2907189A1 (fr) 2006-10-16 2008-04-18 Saint Gobain Isover Sa Isolant mince pour isolation thermique
FR2930623B1 (fr) 2008-04-29 2012-12-28 Saint Gobain Isover Produit pour isolation thermique
EP2180104A1 (de) 2008-10-21 2010-04-28 Rockwool International A/S Fassadenisolierungssystem
WO2012052796A1 (en) 2010-10-19 2012-04-26 Soletanche Freyssinet Structural cable with fire protection
KR20180026383A (ko) 2015-06-30 2018-03-12 파우에스엘 인터나치오날 아게 실린더형 열보호 외피 및 캡

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Title
JUNG HOLGER: "FPB 1200 Fire Protection Blanket", PES.TEC PE SPECIALISTEN TECHNOLOGY, 1 May 2010 (2010-05-01), XP055800405

Also Published As

Publication number Publication date
EP3317461B1 (de) 2022-11-30
ES2938233T3 (es) 2023-04-05
RU2017140418A (ru) 2019-07-30
HK1249154A1 (zh) 2018-10-26
CN107889513B (zh) 2021-03-19
JP2018529858A (ja) 2018-10-11
CN107889513A (zh) 2018-04-06

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