FR2691184A1 - Sheetpile driving process with guide and protective cap - uses excavator bucket for driving with cap of reinforced top centre Vee piece legs with slots and chained pins holding pile during driving - Google Patents

Abstract

A process, for constructing trenches protected by guide sheaths and protective caps for sheetpiles, uses a guide, vibrating bucket and sheetpile cap simultaneously. Mechanical excavators are used with the bucket acting as pile driver. The protective cap (1) has a reinforced top (2) with a V-shaped shell in the middle, lifting rings (4) and two legs (5) with slots (6) for chained pins (7) to hold the sheetpile during driving. USE/ADVANTAGES - Speeds up work and reduces costs.

Description

Method for making armored trenches by sheet pile guiding cages
and sheet pile protective helmets.

 It is currently known that the pallet guide cages are often used to drive in sheet piles by simply pushing on top with the bucket of the shovel. As soon as the grounds are not very homogeneous on the one hand, the head of the sheet pile is damaged, on the other hand, it is difficult to put these same sheet piles in sheet.

Under these conditions, the current technique has only the solution of replacing the bucket of the shovel with a vibrator, or of having a second shovel on the site with the same vibrator. In both cases, these operations are slow and very expensive.

The present process is based on the simultaneous use of two pieces of equipment known on the market, one being the sheet pile guide cages, with its sheet piles, the other a vibrating bucket, already imagined by the inventor in 1977, but meanwhile carried out in a different way, without this changing anything in the end.

These two pieces of equipment will be completed by the use of a third piece of equipment which is a sheet pile helmet, preferably surmounted by an imprint in which a shovel tooth can take a position or a shovel edge can take place to control the direction at as it is pushed in under vibration, this imprint is lined with anti-wear and anti-noise materials.

Therefore the working process becomes ultra simple, because as long as the ground allows the shovel terrace with its bucket without using the vibration. Reached at a certain depth of earthwork the shovel presses with the tooth or the edge of its bucket while activating the vibration on the top of the sheet pile.

For the installation of the pal boards, the helmet can be used as a gripping means, fixing itself on the sheet pile head on the ground with rings or lifting chains by which the shovel can lift it to slide it in the pockets of cages of guide pal boards or any other device. This helmet will stay in place with its tooth imprint well erected towards the sky.

The helmet is provided with lifting rings by which a ratchet lifting shackle controlled from the ground will be attached. As soon as the helmet + shackle + sheet pile assembly is raised and placed in the guide cage, the shackle opening pawl will be ordered from the ground, the shackle is removed and the helmet remains in place.

As the earthwork progresses, the helmet is pressed with a bucket with or without vibration to drive in the sheet pile guided by the cage.

Figure 1 shows a helmet (1) with a reinforced top (2), optionally provided with a tooth shell (3), lifting rings (4) with two ears (5) provided with lights (6 ), an axis (7) coming, through the lights (6), hold the sheet pile
Figure 2 shows a ratchet lifting shackle (8) in which the axis (9) will be fixed on the rings (4) for lifting, which axis (9) will retract by pulling the string (10) on the ratchet (11).

FIG. 3 shows a series of sheet piles (12) in place with a helmet (1) interposed between the bucket (14) and the sheet piles (12).

Figure 4 shows the relative position of the sheet pile (12) embedded in the helmet (13) (bottom view).

FIG. 5 shows the vibrating bucket (17) in the working position, the tooth (15) of the cutting kit (16) directed downwards with the vibration.

Claims (1)

 Claim Claim 1 Sheet pile protection helmet (12) characterized in that it is a protection of the sheet pile heads, used against the pressure of vibrating buckets or not, provided with fixing means (5), (6) and (7) to remain on the sheet pile continuously during driving in, a reinforced top (2), lifting handles (4) and a removable handling shackle (8).