NZ756050B2 - Anchor device for prestressed diaphragm wall - Google Patents
Anchor device for prestressed diaphragm wallInfo
- Publication number
- NZ756050B2 NZ756050B2 NZ756050A NZ75605018A NZ756050B2 NZ 756050 B2 NZ756050 B2 NZ 756050B2 NZ 756050 A NZ756050 A NZ 756050A NZ 75605018 A NZ75605018 A NZ 75605018A NZ 756050 B2 NZ756050 B2 NZ 756050B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- prestressing reinforcement
- anchor
- sleeve
- anchor device
- reinforcement
- Prior art date
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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
Abstract
The invention relates to an anchor device for a prestressed cast wall (2), comprising at least one prestressing reinforcement (3) and a sleeve (5) surrounding said at least one prestressing reinforcement (3) and forming an anchor for said at least one prestressing reinforcement (3) in the cast wall (2), a length (Ld) of the anchor sleeve (5) being strictly less than a length (La) of said at least one prestressing reinforcement (3), the anchoring sleeve (5) comprising a sealing material arranged in such a way as to coat each prestressing reinforcement (3), the anchor device (1) comprising an anti-corrosion coating of each prestressing reinforcement (3). The invention relates to an anchor device for a prestressed cast wall (2), comprising at least one prestressing reinforcement (3) and a sleeve (5) surrounding said at least one prestressing reinforcement (3) and forming an anchor for said at least one prestressing reinforcement (3) in the cast wall (2), a length (Ld) of the anchor sleeve (5) being strictly less than a length (La) of said at least one prestressing reinforcement (3), the anchoring sleeve (5) comprising a sealing material arranged in such a way as to coat each prestressing reinforcement (3), the anchor device (1) comprising an anti-corrosion coating of each prestressing reinforcement (3). The inventive concept is that each prestressing reinforcement to comprise an individual protecting duct provided around the part of each prestressing reinforcement only in the part of each prestressing reinforcement disposed above the anchor sleeve. By doing this this prevents corrosion of the tendons while the concrete hardens.
Claims (11)
1. An anchor device for a prestressed diaphragm wall, comprising at least one prestressing reinforcement and a sleeve encasing said at least one prestressing reinforcement and forming an anchorage for said at least one 5 prestressing reinforcement in the diaphragm wall, a length (Ld) of the anchor sleeve being strictly less than a length (La) of said at least one prestressing reinforcement, the anchor sleeve comprising a sealing material disposed in such a way as to coat each prestressing reinforcement, the anchor device comprising a corrosion-resistant coating of each prestressing reinforcement 10 over all the length of each prestressing reinforcement, the anchor device further comprising a first sealed plug in an overlap zone between a part of said at least one prestressing reinforcement in the anchor sleeve and a part of said at least one prestressing reinforcement above the anchor sleeve, wherein each prestressing reinforcement comprises an individual protecting 15 duct provided around the part of each prestressing reinforcement above the anchor sleeve, and wherein the anchor device further comprises a second sealed plug positioned beneath a first base forming a bottom of the sleeve, wherein the corrosion-resistant coating comprises the individual protecting duct, said individual protecting duct protecting individually each prestressing 20 reinforcement only in the part of each prestressing reinforcement disposed above the sleeve.
2. The anchor device according to the preceding claim, wherein the corrosion-resistant coating comprises a material for coating the prestressing reinforcement in a part of the prestressing reinforcement disposed outside of 25 the sleeve.
3. The anchor device according to the preceding claim, wherein the corrosion-resistant coating of the sealing part comprises the sealing material disposed in contact with the prestressing reinforcement in the sleeve.
4. The anchor device according to one of the preceding claims, comprising 30 a duct for encapsulating a sheath of the anchor sleeve. 1005911740
5. The anchor device according to the preceding claim, wherein the duct comprises an outer surface provided with rough areas.
6. The anchor device according to the preceding claim, wherein the rough areas are formed by ringed ridges and/or ribs. 5
7. The anchor device according to one of the preceding claims, wherein said at least one prestressing reinforcement comprises a plurality of wires spread out and bent back on themselves in the anchor sleeve.
8. The anchor device according to one of the preceding claims, wherein the sealing material is a mortar, for example of the ultra-high performance 10 fibre-reinforced concrete type or a cement grout.
9. The anchor device according to one of the preceding claims, wherein the length of the anchor sleeve lies in the range 2% to 50% of the length of said at least one prestressing reinforcement, preferably in the range 2% to 15
10. A prestressed diaphragm wall comprising at least one anchor device according to one of the preceding claims, wherein the anchor sleeve is sealed in a portion of the diaphragm wall.
11. A method of manufacturing a diaphragm wall, comprising: - a step of excavating in the ground, 20 - a step of inserting, into the excavation, a reinforcement cage provided with at least one anchor device according to one of claims 1 to 9, - a step of pouring concrete into the excavation provided with the reinforcement cage and with said at least one anchor device, - a step of tensioning each prestressing reinforcement of said at least one 25 anchor device. 1005911740
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1751164A FR3062862B1 (en) | 2017-02-13 | 2017-02-13 | ANCHORING DEVICE FOR PRECONTROLLED MOLDED WALL |
| PCT/FR2018/050337 WO2018146431A1 (en) | 2017-02-13 | 2018-02-13 | Anchor device for pre-stressed cast wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ756050A NZ756050A (en) | 2025-05-30 |
| NZ756050B2 true NZ756050B2 (en) | 2025-09-02 |
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