GB2251207A - Piledriver pad - Google Patents
Piledriver pad Download PDFInfo
- Publication number
- GB2251207A GB2251207A GB9028174A GB9028174A GB2251207A GB 2251207 A GB2251207 A GB 2251207A GB 9028174 A GB9028174 A GB 9028174A GB 9028174 A GB9028174 A GB 9028174A GB 2251207 A GB2251207 A GB 2251207A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piledriver
- metal
- pad according
- strip
- pad
- 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.)
- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000010814 metallic waste Substances 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004760 aramid Substances 0.000 abstract description 3
- 229920003235 aromatic polyamide Polymers 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 3
- 239000011521 glass Substances 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 3
- 239000011707 mineral Substances 0.000 abstract description 3
- 229920002239 polyacrylonitrile Polymers 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000013536 elastomeric material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/10—Follow-blocks of pile-drivers or like devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/103—Metal fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
A piledriver pad comprises strip (2) spirally wound from cured elastomeric sheet which is internally reinforced, as with metal gauze or fibres of glass, metal, ceramic material, mineral silicate, aramid or polyacrylonitrile and facing plates (5, 6) of metal to protect the strip. The spirally wound strip may enclose a core (7) such as of subdivided metal (e.g. metal waste) or of superimposed metal discs. The construction avoids that waste of reinforced cured elastomeric sheet which is entailed when the disc-forms customary for piledriver pads are cut from it. <IMAGE>
Description
PILEDRIVER PADS
This invention relates to piledriver pads, that is to say the cushions employed in piledriving in order to limit, in both the pile and the hammer, the very high impact stresses that occur during operation.
One form of pad in present use is made by laminating composite sheet that comprises resilient facings which are of cured elastomeric material (eg natural rubber, styrene butadiene rubber, acrylonitrile bu-tadiene rubber, polychloroprene) which is internally reinforced, as by fibres of asbestos or certain non-asbestos fibres eg of ceramic material, mineral silicate, glass, aramid or polyacrylonitrile. The manufacture of one form of elastomeric sheet suitable as resilient Lacing is described in our British Patent 2 094 821. The facings may enclose and be bonded to a flexible coe of metal: see our GB-A-2- 208 62s. In cutting the reinforced cueed elastomeric sheet material to the disc-form that is customary for piledriver pads, a considerabie amount of the material is wasted.
According to the present invention, a piledriver pad comprises strip spirally wound from fibres or other internally-reinforced cured elastomeric sheet, and facing plates of metal to protect the strip. Such a pad can be made without substantial waste of the elastomeric sheet because practically nothing is lost when the sheet is cut into the strip that is wound into spiral form.
-To improve the resilience of the pad, the strip may be corrugated. Corrugation is conveniently carried out during the winding operation.
As already indicated, the internal reinforcement of the elastomeric sheet material from which the strip is cut will usually be fibrous in nature, such as fibres of ceramic material, mineral silicate, glass, aramid or polyacrylonitrile. It may, however, be of reinforcing gauze, such as wire gauze. Fibres and gauze may even be employed together. The saving that results from avoidance of the was-te consequent on cutting the cured elastomeric sheet into disc-form will, of course, vary with the cost of tile sheet itself.Particularly good savings ctn be nl > de by applying the invention to pads in which the internal reinforcement of the sheet comprises metal fibres, especially loosely interconnected metal fibres, such as those in steel wool, as described in our copending unpublished GB 9016383.3 filed 26 July 1990.
To improve the ability of the pad to conduct away the heat generated by impact of the hammer, the spirally wound strip may enclose a core of subdivided mental, "subdivided" being a term we employ to exclude a monolithic metal core.
Thus, although the core preferably comprises- the metal waste that results from the cutting or like operation by which the protective facing plates of the pad are formed, it may alternatively comprise a number of superimposed metal discs, suitably of aluminium.
Preferably, the facing plates are themselves of aluminium, and the metal waste just referred to will then also be of aluminium.
The mechanical stability of the structure can be improved by a keeper ring encircling the spirally wound strip.
The invention is further described with eference to the acconpanying drawing, which is a diagrammatic representation of a piledriver pad in vertical section.
The pad 1 comprises corrugated strip 2 of internally reinforced cured elastomeric material in the form -of a wound spiral whose plane, horizontal surfaces 3 (upper) and- 4 (lower) are formed by the aligned, originally vertical, sides of strip cut from a flat sheet 1.8rim thick of the elastomeric material.
Secured to the surfaces 3 and 4, as by gluing, are discform protective aluminium plates 5 and 6 respectively
The spirally wound strip 2 encloses a core 7, made up of the compacted coarse-cut waste aluminium resulting from the operation by which the protective plates 5 and 6 are cut or stamped into disc-form from aluminium sheet
A keeper ring 8 encircles the wound strip 2.
Claims (12)
1 A piledriver pad which comprises strip spirally wound
from internally reinforced cured elastomeric sheet,
and facing plates of metal to protect the strip.
2 Piledriver pad according to claim 1, in which the
strip is corrugated.
3 Piledriver pad according to claim 1 or 2, in which
said sheet is internally reinforced with metal fibres.
4 Piledriver pad according to claim 3, in which the
metal fibres are loosely interconnected.
5 Piledriver pad according to claim 1 or 2, in which
said sheet is internally reinforced with metal gauze.
6 Piledriver pad according to any of claims l to 5, in
which the spirally wound strip encloses a core of
subdivided metal.
7 Piledriver pad according to claim 6, in which said
core comprises a number of superimposed metal discs.
8 Piledriver pad according to claim 7 in which the core
discs are of aluminium.
9 Piledriver pad according to claim 6, in which the said
core comprises the metal waste that results from the
-cutting or like operation by which the protective
facing plates of the pad are formed.
10 Piledriver pad according to any of claims 1 to 9, in
which the facing plates are of aluminiuin.
11 Piledriver pad according to any of claims 1 to 10. in
which the spirally wound strip is encircled by a
keeper ring.
12 Piledriver pad according to claim 1, substantially as
described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9028174A GB2251207A (en) | 1990-12-28 | 1990-12-28 | Piledriver pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9028174A GB2251207A (en) | 1990-12-28 | 1990-12-28 | Piledriver pad |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9028174D0 GB9028174D0 (en) | 1991-02-13 |
| GB2251207A true GB2251207A (en) | 1992-07-01 |
Family
ID=10687666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9028174A Withdrawn GB2251207A (en) | 1990-12-28 | 1990-12-28 | Piledriver pad |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2251207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132524A (en) * | 2011-11-24 | 2013-06-05 | 五冶集团上海有限公司 | Pile head crash pad of hammering pile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340210A (en) * | 1980-01-25 | 1982-07-20 | Metex Corporation | Pile driver cushion |
| US4457499A (en) * | 1980-01-25 | 1984-07-03 | Metex Corporation | Pile driver cushion |
-
1990
- 1990-12-28 GB GB9028174A patent/GB2251207A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340210A (en) * | 1980-01-25 | 1982-07-20 | Metex Corporation | Pile driver cushion |
| US4457499A (en) * | 1980-01-25 | 1984-07-03 | Metex Corporation | Pile driver cushion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132524A (en) * | 2011-11-24 | 2013-06-05 | 五冶集团上海有限公司 | Pile head crash pad of hammering pile |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9028174D0 (en) | 1991-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |