FIRE RESISTANT TUNNEL EXPANSION JOINT SYSTEMS

• US 20170226733A1
• Filed: 04/24/2017
• Published: 08/10/2017
• Est. Priority Date: 11/20/2008
• Status: Active Grant

• Current Assignee: Sika Technology Ag (Compagnie de Saint-Gobain SA)
• Original Assignee: Emseal Joint Systems Limited
• Inventors: Witherspoon, William, Hensley, Lester
• Granted Patent: US 10,519,651 B2
• Time in Patent Office: Days
• CPC Class Codes: E02D 29/045 Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
• CPC Class Codes: E04B 1/6812 Compressable seals of solid form
• CPC Class Codes: E04B 1/6815 Expansion elements specially adapted for wall or ceiling parts
• CPC Class Codes: E04B 1/948 Fire-proof sealings or joints for doors or windows E06B5/164
• CPC Class Codes: E04B 2001/6818 Joints with swellable parts
• CPC Class Codes: E21D 11/385 Sealing means positioned between adjacent lining members for joints in foundation structures E02D29/16; for sewers E03F3/04; for building structures in general E04B1/68

Abstract

A fire resistant tunnel expansion joint system for installation between substrates of a tunnel. The system includes a fire protection barrier applied at a predetermined thickness to the substrates and a fire resistant tunnel expansion joint. The tunnel expansion joint includes a core and a fire retardant infused into the core. The core is configured to define a profile to facilitate the compression of the tunnel expansion joint when installed between the substrates. The fire protection barrier and the fire resistant tunnel expansion joint are each capable of withstanding exposure to a temperature of at least about 540° C. or greater for about five minutes.

Claims

1. A fire resistant tunnel expansion joint system, comprising:

a fire protection barrier applied at a predetermined thickness to substrates of a tunnel; and

a fire resistant tunnel expansion joint including;

a core; and

a fire retardant infused into the core, the core configured to facilitate compression of the tunnel expansion joint when installed in a gap between the substrates, and the fire retardant infused core has a density of about 160 kg/m³ to about 800 kg/m³;

wherein the fire protection barrier and the fire resistant tunnel expansion joint are capable of meeting Rijkswaterstaat (RWS) tunnel fire standard.

2. The fire resistant tunnel expansion joint system of claim 1, wherein the fire protection barrier and the fire resistant tunnel expansion joint are capable of meeting the Rijkswaterstaat (RWS) tunnel fire standard by being capable of keeping an interface between the tunnel expansion joint system and the substrates below about 380°

C. for about two hours upon exposure to temperatures reaching about 1100°

C. after about five minutes and peaking at about 1350°

C. with a fire burn duration of about two hours.

3. The fire resistant tunnel expansion joint system of claim 1, wherein the fire protection barrier is applied to the substrates, which are concrete, by at least one of spraying and troweling.

4. The fire resistant tunnel expansion joint system of claim 1, wherein the fire resistant tunnel expansion joint fills the gap in at least one of a tunnel floor, a tunnel wall and a tunnel roof, provides movement and supports RWS fire rating by performing to the RWS tunnel fire standard.

5. The fire resistant tunnel expansion joint system of claim 1, wherein the core comprises a plurality of individual laminations assembled to construct a laminate, one or more of the laminations being infused with at least one of the fire retardant and a water-based acrylic chemistry.

6. The fire resistant tunnel expansion joint system of claim 1, wherein the core comprises foam.

7. The fire resistant tunnel expansion joint system of claim 1, wherein the core comprises open celled polyurethane foam.

8. The fire resistant tunnel expansion joint system of claim 1, wherein a first layer of a water resistant material is disposed on the core, the water resistant material comprising a silicone.

9. The fire resistant tunnel expansion joint system of claim 8, wherein the water resistant material disposed on the core is selected from the group consisting of polysulfides, acrylics, polyurethanes, poly-epoxides, silyl-terminated polyethers, and combinations of one or more of the foregoing.

10. The fire resistant tunnel expansion joint system of claim 8, further comprising a second layer disposed on the first layer of the water resistant material, wherein the second layer is selected from the group consisting of another water resistant material, a fire barrier layer and combinations thereof.

11. The fire resistant tunnel expansion joint system of claim 1, wherein the core is tooled to define at least one of a bellows profile and a bullet profile.

12. The fire resistant tunnel expansion joint system of claim 1, wherein the ratio of the fire retardant infused into the core is in a range of about 3.5:

1 to about 4;

1 by weight.

13. The fire resistant tunnel expansion joint system of claim 1, wherein a layer comprising the fire retardant is sandwiched between the material of the core.

14. The fire resistant tunnel expansion joint system of claim 1, wherein the fire retardant infused into the core is selected from the group consisting of water-based alumina tri-hydrate, metal oxides, metal hydroxides, aluminum oxides, antimony oxides and hydroxides, iron compounds, ferrocene, molybdenum trioxide, nitrogen-based compounds, phosphorus based compounds, halogen based compounds, halogens, and combinations of the foregoing materials.

15. The fire resistant tunnel expansion joint system of claim 1, wherein the core uncompressed has a density of about 50 kg/m³ to about 250 kg/m³.

16. The fire resistant tunnel expansion joint system of claim 1, wherein the fire protection barrier is applied at the predetermined thickness to achieve a substantially uniform layer on the substrates of the tunnel.

17. The fire resistant tunnel expansion joint system of claim 16, wherein the fire and water resistant expansion joint is positioned in the gap between the substrates of the tunnel, an edge of the gap is chamfered as the edge abuts the expansion joint and the fire protection barrier is applied to fill the chamfer.

18. The fire resistant tunnel expansion joint system of claim 1, wherein the fire protection barrier is applied at the predetermined thickness to achieve a substantially uniform layer on the substrates of the tunnel to a predetermined distance away from the gap between the substrates, and at a second predetermined thickness from the predetermined distance until an edge of the gap.

19. The fire resistant tunnel expansion joint system of claim 18, wherein the fire protection barrier is applied in an increasingly tapered manner from the predetermined thickness at the predetermined distance away from the gap until reaching the second predetermined thickness at the edge of the gap.

20. A fire resistant tunnel expansion joint system, comprising:

a fire protection barrier applied at a predetermined thickness to substrates of a tunnel; and

a fire resistant tunnel expansion joint including;

a core; and

a fire retardant infused into the core, the core configured to facilitate compression of the fire resistant tunnel expansion joint when installed in a gap between the substrates, and the fire retardant infused core compressed has a density of about 160 kg/m³ to about 800 kg/m³; and

wherein the fire protection barrier and the fire resistant tunnel expansion joint are capable of withstanding exposure to a temperature of about 540°

C. at about five minutes.

21. A fire resistant tunnel expansion joint system, comprising:

a core; and

a fire retardant infused into the core, the core configured to facilitate compression of the fire resistant tunnel expansion joint system when installed in a gap between tunnel substrates, and the fire retardant infused core compressed has a density of about 160 kg/m³ to about 800 kg/m³; and

wherein the fire resistant tunnel expansion joint system is capable of withstanding exposure to a temperature of about 540°

C. at about five minutes, and the fire resistant tunnel expansion joint system is configured to transition in at least one of;

curved sections, straight sections, coiled sections and angled sections.

22. The fire resistant tunnel expansion joint system of claim 21, further comprising a fire protection barrier applied to the tunnel substrates.