Fire protection device for a structural cable

Patent metadata

Field	Value
Publication number	US-10000899-B1
Application number	US-201715837284-A
Country	US
Kind code	B1
Filing date	Dec 11, 2017
Priority date	Dec 19, 2016
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A fire protection device for a structural cable is proposed including taught metal reinforcements (32) and having a first stretch (41), a second stretch (42) and a connection zone (40) of a collar (30) located between the first and second stretches. The fire protection device comprises a protective mat (34) surrounding the structural cable (16) in the first and second stretches (41, 42) and interrupted in the connection zone (40), and a thermally insulating ring (36) more rigid than the protective mat (34), arranged between the reinforcements (32) and the collar (30) in the connection zone (40) and cooperating with the protective mat in order to provide the reinforcements with a continuous thermal protection along the first stretch (41), of the connection zone (40) and of the second stretch (42).

First claim

The invention claimed is:

1. A fire protection device for a structural cable of a construction work, with the structural cable comprising taught metal reinforcements and having a first stretch, a second stretch and a connection zone of a collar located between the first and second stretches, with the fire protection device including:
a protective mat surrounding the structural cable at least in the first and second stretches and interrupted in the connection zone; and
a thermally insulating ring more rigid than the protective mat, arranged between the reinforcements and the collar in the connection zone and cooperating with the protective mat in order to provide the reinforcements with a continuous thermal protection along the first stretch, of the connection zone and of the second stretch.

2. The fire protection device according to claim 1 , wherein the insulating ring comprises several elements assembled around reinforcements, in mutual contact along surfaces lined with a firebreak seal.

3. The fire protection device according to claim 1 , wherein a deviator tube made of plastic material is placed between, the insulating ring and the reinforcements in the connection zone.

4. The fire protection device according to claim 1 , wherein the insulating ring is made from a fibre-reinforced concrete.

5. The fire protection device according to claim 4 , wherein the fibre-reinforced concrete includes metal fibres and polypropylene fibres.

6. The fire protection device according to claim 1 , wherein the protective mat is comprised of several segments arranged end-to-end in at least one of the first and second stretches of the structural cable, with an overlay mat being placed around two adjacent segments in order to pride the continuity of the thermal protection.

7. The fire protection device according to claim 1 , wherein the protective mat is placed longitudinally in contact with the insulating ring on the side of the first stretch and on the side of the second stretch.

8. The fire protection device according to claim 1 , wherein the protective mat has a portion that has a longitudinal overlay with the thermally insulating ring, between the reinforcements and the thermally insulating ring.

9. The fire protection device according to claim 1 , wherein an intumescent material is arranged at the interface between the protective mat and the insulating ring on the side of the first stretch and on the side of the second stretch.

10. The fire protection device according to claim 1 , further comprising, in at least one of the first and second stretches, a tube wherein are housed the reinforcements of the structural cable, with the protective mat being arranged around said tube.

11. The fire protection device according to claim 1 , wherein the insulating ring has a rigidity at least 100 times greater than that of the protective mat.

12. A constuction work comprising at least one structural cable and a collar connected to the structural cable in a connection zone, the structural cable comprising taught metal reinforcements and having a first stretch and a second stretch on either side of the connection zone of the collar, with the construction work further comprising a fire protection device including:
a protective mat surrounding the structural cable at least in the first and second stretches; and
a thermally insulating ring more rigid than the protective mat, arranged between the reinforcements and the collar in the connection zone and cooperating with the protective mat in order to provide the reinforcements with a continuous thermal protection along the first stretch, from the connection zone and of the second stretch.

13. The construction work according to claim 12 , wherein the structural cable further comprises an outer sheath surrounding the reinforcements and the protective mat in at least one of the first and second stretches.

14. The construction work according to claim 12 , wherein the collar provides a connection of at least one damper element to the structural cable in order to dampen vibrations of the structural cable.

15. The construction work according to claim 12 , comprised of a cable-stayed bridge, an extradosed bridge, a suspension bridge or a cable-stayed tower.

Assignees

• Soletanche Freyssinet

Inventors

• Fabry Nicolas
• Guicheteau Romain

Classifications

• D07B1/06

  Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core · CPC title

• D07B2201/2088

  having multiple layers · CPC title

• E04B1/944

  covered with fire-proofing material · CPC title

• E01D11/04

  Cable-stayed bridges · CPC title

• E01D19/16 Primary

  Suspension cables; Cable clamps for suspension cables {; Pre- or post-stressed cables} · CPC title