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AU, PU,GU sheet piles.

AU sheet piling proposed for the Main Wall was a custom designed pile specifically suited to this project. AU14, AU16, AU18, AU20, AU23, AU25 types sheet piles are all from Acelor. Full calculations of the derivation of section modulus for thecustom pile, and the standard pile were supplied to the Client and their Engineers. Backfill in the anchor zone should be compacted to achieve the desired resistance. Near the wall, however, the material should be sufficient porous to allow adequate drainage. Table 3 shows the segment of the GU sheet piles prior to corrosion loss.

The PU sheet pile was built in a modular style which allows the thickness of the plate to be varied to accommodate different stress levels and corrosion zones. The following table gives the approximate minimum diameters of circular cofferdam which can be constructed using various sheet pile sections. Drain holes should be tapped on the wall with adequate frequency.PU12,PU12 10/10, PU18, PU22, PU28, PU32 sheet piles are normally for HZ and OZ steel sheet pile.

For seawall of inadequate elevation, it is advisable to install a drain field using pebbles or gravel field. The diameters are only intended to be for guidance as the actual interlock deviation achieved will be a function of the pile length, the pile section, the penetration required. Table 3 shows the section modulus and moment capacity of each segment of the GU sheet piles prior to corrosion loss. All calculations were performed in accordance with the guidelines set out in BS 5950 Part 5. Smaller diameters can be achieved by introducing bent corner piles, but
larger diameters will result if pairs of piles that have been crimped or welded are used.
GU6N, GU8N,GU16N,GU18N,GU16-400, GU18-400 types are better than sheet piling Thyssen and Thyssenkrupp.

A hard surface made of reinforced concrete also could prove to be effective against erosion caused by overtopping. It can be driven to form a complete circle without the need for corner piles. AZ piles have a maximum angle of deviation of 5°. Such hard surface must be constructed on adequate and well-drained foundation to be effective.

 

 

Section Dimensions Mass Moment of inertia Modulus of section
Width Height Thickness Per pile Wall
b h t s        
mm mm mm mm kg/m kg/m2 cm4/m cm3/m
AU
AU14 750 408 10 8.3 77.9 103.8 28710 1410
AU 16 750 411 11.5 9.3 86.3 115 32850 1600
AU 18 750 441 10.5 9.1 88.5 118 39300 1780
AU 20 750 444 12 10 96.9 129.2 44440 2000
AU 23 750 447 13 9.5 102.1 136.1 50700 2270
AU 25 750 450 14.5 10.2 110.4 147.2 56240 2500
PU
PU 12 600 360 9.8 9 66.1 110.1 21600 1200
PU1210/10 600 360 10 10 69.6 116 22580 1255
PU 18 600 430 11.2 9 76.9 128.2 38650 1800
PU 22 600 450 12.1 9.5 86.1 143.6 49460 2200
PU 28 600 454 15.2 10.1 101.8 169.6 64460 2840
PU 32 600 452 19.5 11 114.1 190.2 72320 3200
GU
G6N 600 309 6 6 41.9 69.9 9670 625
GU7N 600 310 6.5 6.4 44.1 73.5 10450 675
GU7S 600 311 7.2 6.9 46.3 77.1 11540 740
GU8N 600 312 7.5 7.1 48.5 80.9 12010 770
GU8S 600 313 8 7.5 50.8 84.6 12800 820
GU13N 600 418 9 7.4 59.9 99.8 26590 1270
GU14N 600 420 10 8 64.3 107.1 29410 1400
GU15N 600 422 11 8.6 68.7 114.5 32260 1530
GU16N 600 430 10.2 8.4 72.6 121 35950 1670
GU18N 600 430 11.2 9 76.9 128.2 38650 1800
GU20N 600 430 12.2 9.5 81.1 135.2 41320 1920
GU21N 600 450 11.1 9 81.9 136.5 46380 2060
GU22N 600 450 12.1 9.5 86.1 143.6 49460 2200
GU23N 600 450 13.1 10 90.4 150.7 52510 2335
GU16-400 400 290 12.7 9.4 62 154.9 22580 1560
GU18-400 400 292 15 9.7 69.3 173.3 26090 1785