Static structures (e.g. – buildings) – Processes – Filling preformed cavity
Patent
1987-11-11
1991-01-29
Safavi, Michael
Static structures (e.g., buildings)
Processes
Filling preformed cavity
52170, E04G 2304
Patent
active
049877186
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a pole reinforcement system.
More particularly, this invention relates to a pole reinforcement system which can be used to reinforce the buried ends of wooden poles.
The general object of the invention is to provide a simple yet effective technique which can be used to reinforce the buried ends of wooden poles such as utility poles. The structural properties of utility poles can be very seriously downgraded by rotting which usually occurs a short distance beneath the ground level. The technique of the invention provides a simple yet effective technique of reinforcing the poles so as to prolong their useful life.
According to the present invention there is provided a method of reinforcing a pole, the method comprising the steps of placing a first elongate reinforcing member adjacent to the pole, said elongate member being curved in transverse cross-section so as to partly surround the periphery of the pole, driving the member downwardly so that its lower portion is embedded in the ground adjacent to the buried end of the pole, placing a second elongate member adjacent to the pole, said second elongate member being curved in transverse cross-section so as to partly surround the periphery of the pole and being located so that one edge region thereof overlaps one edge region of the first member, driving the second elongate member so that its lower portion is embedded in the ground adjacent to the buried end of the pole and fixing the first and second members to the pole.
The invention will nor be further described with reference to the accompanying drawings, in which:
FIG. 1 is a side view of a reinforcing member of the invention,
FIG. 2 is an edge view of the member,
FIG. 3 is a plan view of the member,
FIG. 3, 4 and 4A show diagrammatically the positioning of the elongate member with respect to a pole to be reinforced,
FIG. 5 shows the final position of the member,
FIG. 6 is a diagrammatic cross-sectional view showing four reinforcing members surrounding the pole,
FIG. 7 shows a modified arrangement using three reinforcing members,
FIG. 8 illustrates a technique for boring through the pole.
FIG. 9 shows a cross-section through the reinforced pole, and
FIG. 10 shows the pole as reinforced in accordance with the invention.
FIGS. 1 to 3 show a preferred form of reinforcing member 2 constructed in accordance with the invention. The reinforcing member is typically three metres long and is fabricated from H.U. 280 steel and is preferably three millimetres in thickness. As seen in FIG. 2, the member 2 is curved in cross-section and the radius R is in the range from 120 to 250 mm. The member 2 subtends an angle A which is in the range 90.degree. to 180.degree. so that it will embrace about 20 to 40% of the periphery of a pole 4 to be reinforced. The member 2 inclues a driving lug 6 welded on the convex face 8 of the member substantially midway along the length of the member. The member has upper mounting holds 3 and 5 and central mounting holes 7 and 9.
FIGS. 4 and 5 diagrammatically illustrate driving the member 2 into the ground 10 adjacent to the buried end 12 of the pole 4. The buried end 12 may include rotted regions 14, as shown. The member 2 is placed adjacent to the pole 4 with its concave side 16 partly surrounding the pole. The lower end 18 of the member rests on the ground 10. A number of restraining bands 20 are used to hold the concave face 16 of the member adjacent to the pole whilst a driving force is applied to the lug 6. This ensures that the lower end 18 of the member penetrates the ground and remains adjacent to the surface of the buried end 12 of the pole. The restraining bands 20 may comprise rollers 22 mounted for rotation on curved shafts 24, the ends of the shafts 24 being connected to chains 26. Chain tensioning devices 28 are included so as to apply tension to the chains and thus cause the rollers 22 to very firmly hold the concave face 16 of the member 2 adjacent to the surface of the pole. As mentioned before, this ensures that the member 2 remains adjacent to th
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Eltek Holdings Pty., Ltd.
Safavi Michael
LandOfFree
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