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April 2013DateTemporary Single Sided Sheet Pile Retaining WallsTitle

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Contents

1. IntroductionThis user information provides basic information for simple temporary single sided sheet pile retaining walls and is not intended for other purposes. Refer to Appendix A for details of our site demonstrator service.

2. DesignNo information on design is included in this user guide.Customers are strongly advised to employ a competent Engineer to provide a suitable design for this type of scheme. One particular point to consider when designing schemes is to take into account the twisting effects at the prop to rail connection point. In many situations it will not be possible to work the raking props to their full capacity. Designers should consult with Mabey Hire for further guidance. Mabey Hire offer a design service and can on request, also provide information on the strengths of components for Customers undertaking their own designs.3. Typical Arrangement

Page 1 :Page 2 :

Pages 3-5 :Page 6 :

Introduction, Design, Typical ArrangementSheet Piles, RailsRaking PropsRestraint Chains, Cleats, Thrust Blocks

Toe-

in

Sheet piles (Ref. section 4)

Restraint Chains (Ref. section 7)

Cleat (Ref. section 8)

TBC by Customer

Sides battered back at a safe angle Required Excavation Width

ELEVATION B-B

Thrust blocks (Ref. section 9)

Cleat Denotes raking prop connection point.

ELEVATION A-A

Sheet Piles

Dep

th o

f dig

Rail

B

Raking prop (Ref. section 6)

Rail (Ref. section 5)

PLAN

A B A

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Appendix A :

Typical Installation and Removal SequenceStacking and Handling, Do’s and Do Not’s, GeneralProvision of a Mabey Hire Site Demonstrator

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4. Sheet Piles4.1 Types of Sheet PilesTypically, the M12 and Multisheet 500/6 sheet piles are used for this type of scheme.

The piles MUST be installed in the orentation shown in the diagrams below. This ensures the cleats can be welded to the widest pan.

It is anticipated that Mabey Hire’s Heavy Duty Shaftbrace (254 UC x 107 kg/m) will be utilised for this type of scheme.

4.2 Installation MethodThe user and the designer shall decide on the method that will be used to install the sheet piles. The designer must consider how the adopted installation method will affect the design.It is important to select an installation method that will enable the sheet piles to be installed to their final toe-in depth prior to any excavating taking place i.e. ‘pre-drive’ or ‘slit trench’.It is the user’s responsibility to determine whether the specified sheet piles will drive to the required depth using their choice of plant.

Care should be taken to achieve a reasonably straight line of piles as a non-linear arrangement may result in the cleats not projecting far enough to restrain the rail’s flanges. The piles need to be driven within +/- 50mm of the theoretical wall line (see below):

4.3 Pile Orientation

5. Rails

rail

denotes fillet weld

Cleat

M12 Pile Multisheet 500/6

Heavy Duty Shaftbrace Rail - 254 x 254 x 107 kg/m UC

Theoretical wall line50

50

Type Length (m) Weight (kg) Code H. Duty Shaftbrace 5.0 570 SHBP-178 H. Duty Shaftbrace 7.25 807 SHBP-192 H. Duty Shaftbrace 8.7 965 SHBP-183 H. Duty Shaftbrace 9.0 975 SHBP-167 H. Duty Shaftbrace 10.2 1125 SHBP-184 H. Duty Shaftbrace 10.5 1150 SHBP-163 H. Duty Shaftbrace 12.0 1460 SHBP-166

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6. Raking Props6.1 Components

6.2 Recommended Prop Angles / Head Arrangements

The raking props utilise components from Mabey Hire’s ‘Mechanical Bracing Strut’ and ‘Light Mechanical Bracing Strut’ product ranges in combination with some special components. For further information on the general com-ponents (e.g. available extension lengths, screw extensions & product weights) used in the make-up of the raking props, refer to Mabey Hire’s ‘User Information for Standard Mechanical Bracing Strut’ and/or ‘User Information for Light Mechanical Bracing Strut’.

Special Components for Raking Props

Ø48

200

Ø22

Modified Raking Male Connector (MBSP-021M) - Weight = 17.3kg

660275275

385

275

Ø48

300

120

Ø3522

020

0

Ø22

200

Modified Raking Female Baseplate Assembly (MBSP-020M) - Weight = 62.8kg

120

Female Tilt Plate(LMBSP-083) - Weight = 22kg

300

Ø48

170 20

30

180

20

180

170

170

346

346

20Ø48

Ø22

170 20

Female Tilt Plate(MBSP-015) - Weight = 27.5kg

Connector Plate 0 - 35 Degrees(MBSP-029) - Weight = 26.8kg

120

250

360

Male Tilt Plate H.D. Shaftbrace(MBSP-016M) - Weight = 24.7kg

Ø48

100

20 150 19

150

125

Flange Stiffener (MBSP-028) - Weight = 7.3kg

250

Ø22

20

115

Clamp Plate (MBSP-027) - Weight = 2.6kg

250

80

Ø48

375

20

19

175

Prop Angle 18 - 25o

Max Prop Load 300kNWith Flange Sti�ener

Prop Angle 0 - 32o

Max Prop Load 400kNNo Flange Sti�ener

Prop Angle 32 - 35o

Max Prop Load 400kNWith Flange Sti�ener

When using the MBSP-016M When using the MBSP-029

Prop Angle 0 - 18o

Max Prop Load 300kNNo Flange Sti�ener

Strut Type ‘A’

Strut Type ‘B’

Strut Type ‘A’

Strut Type ‘B’

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6.3 Typical Prop Make-ups

6.4 Connection Details

6.3.1 Based on the ‘Standard Mechnical Bracing Strut (MBS)’

6.3.2 Based on the ‘Light Mechnical Bracing Strut (LMBS)’

MBSP-021MMBSP-020M

Screw Unit (MBSP-001)(1125 - 1725 long) Extensions to suit (MBSP)

MBSP-015MBSP-016MMBSP-027

MBSP-028

MBSP-021MMBSP-020M

Screw Unit (MBSP-001)(1125 - 1725 long) Extensions to suit (MBSP)

MBSP-015MBSP-029

MBSP-027

MBSP-028

Screw unit (LMBSP-075)(925 - 1325 long) Extensions to suit (LMBSP)

LMBSP-083

MBSP-027MBSP-016M

MBSP-020MMBSP-021M

MBSP-028

Screw unit (LMBSP-075)(925 - 1325 long) Extensions to suit (LMBSP)

LMBSP-083

MBSP-027MBSP-029

MBSP-020MMBSP-021M

MBSP-028

Connection Location Type of Connection Item Code Quantity (Per connection)

i. MBSP-020M to foundation By Customer By Customer N/A By Customer

ii. MBSP-020M to MBSP-021M iii. MBSP-015 to MBSP-016M iv. LMBSP-083 to MBSP-016M v. MBSP-015 to MBSP-029 vi. LMBSP-083 to MBSP-029

Pinned Bailey Pin

47mm∅ x 200 long

TB-05 1

vii. MBSP-021M to MBSP-001 viii. MBSP-021M to LMBSP-075 Bolted M20 x 75

(Gr. 8.8) SHBP-M20x75 4

ix. MBSP-001 to MBS Extension x. MBS Extension to MBS Extension xi. MBS Extension to MBSP-015

Bolted M20 x 75 (Gr. 8.8) SHBP-M20x75 12

xii. LMBSP-075 to LMBS Extension xiii. LMBS Extension to LMBS Ext. xiv. LMBS Extension to LMBSP-083

Bolted M20 x 75 (Gr. 8.8) SHBP-M20x75 8

xv. MBSP-016M to MBSP-027 xvi. MBSP-029 to MBSP-027 Bolted M20 x 90

(Gr. 8.8) MBSP-011 2

Struts should always be assembled as indicated in the tables above.

*NOTE Use Suffix A for a strut type ‘A’ - Use Suffix B for a strut type ‘B’

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6.5 Standard Strut Assembly Tables

120 L (Pin to Pin)

#

# = 387mm when using the MBSP-016M (as shown)# = 367mm when using the MBSP-029

Code No. Strut Configuration

(Excluding Special Components) Length ‘L’ (mm)

(Pin to pin) Weight (kg)

Extension Length (mm) Min. Max. RMBS-00* Screw Unit 2250 + 750 + 375 4790 5390 689 RMBS-01* Screw Unit 2250 + 1500 5165 5765 690 RMBS-02* Screw Unit 375 + 2250 + 1500 5540 6140 746 RMBS-03* Screw Unit 4500 5915 6515 712 RMBS-04* Screw Unit 4500 + 375 6290 6890 768 RMBS-05* Screw Unit 4500 + 750 6665 7265 803 RMBS-06* Screw Unit 4500 + 750 + 375 7040 7640 859 RMBS-07* Screw Unit 4500 + 1500 7415 8015 860 RMBS-08* Screw Unit 375 + 4500 + 1500 7790 8390 916 RMBS-09* Screw Unit 4500 + 2250 8165 8765 916 RMBS-10* Screw Unit 375 + 4500 + 2250 8540 9140 972 RMBS-11* Screw Unit 750 + 4500 + 2250 8915 9515 1007 RMBS-12* Screw Unit 375 + 750 + 4500 + 2250 9290 9890 1064

Code No. Strut Configuration

(Excluding Special Components) Length ‘L’ (mm)

(pin to pin) Weight (kg)

Extension Length (mm) Min. Max. RLMBS-00* Screw Unit 500 + 2000 + 1000 4715 5115 514 RLMBS-01* Screw Unit 250 + 500 + 2000 + 1000 4965 5365 549 RLMBS-02* Screw Unit 4000 5215 5615 482 RLMBS-03* Screw Unit 4000 + 250 5465 5865 518 RLMBS-04* Screw Unit 4000 + 500 5715 6115 533 RLMBS-05* Screw Unit 4000 + 500 + 250 5965 6365 569 RLMBS-06* Screw Unit 4000 + 1000 6215 6615 553 RLMBS-07* Screw Unit 4000 + 1000 + 250 6465 6865 589 RLMBS-08* Screw Unit 4000 + 1000 + 500 6715 7115 604 RLMBS-09* Screw Unit 250 + 4000 + 1000 +500 6965 7365 639 RLMBS-10* Screw Unit 4000 + 2000 7215 7615 593 RLMBS-11* Screw Unit 250 + 4000 + 2000 7465 7865 629 RLMBS-12* Screw Unit 500 + 4000 + 2000 7715 8115 644

6.5.1 Based on the ‘Standard Mechnical Bracing Strut (MBS)’

6.5.2 Based on the ‘Light Mechnical Bracing Strut (LMBS)’

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Restraint chains are provided as a means of suspending the rail from the sheet piles, particularly during the installation and removal operations. N.B. they are NOT to be used as lifting chains.Users should always ensure that all of the restraint chains are fitted as per the scheme arrangement, or if no scheme has been prepared 1 No. chain at every attachment point, and that as much slack as possible is removed by repositioning the ‘D’ shackle.

Cleats are required to prevent the rail from being pushed upwards and rotated by the raking props. The cleats are welded to the sheet piles and the rail butts against them.Users should always ensure that the cleats are fitted as per the scheme arrangement. Mabey Hire are unable to offer any ‘Rule of thumb’ guidance regarding the number of cleats required.Mabey Hire can supply the cleats (see below), or alternatively, the Customer may provide his own.

Welding the cleats to the sheet pilesIt is the Customer’s responsibility to weld the cleats to the piles.If Mabey Hire have prepared a working scheme then the package should include a suggested weld arrange-ment and procedure for the cleat to pile connection. If the equipment is hired on a ‘supply only’ basis then the Customer will need to arrange his own weld arrangement and procedure.

Removing the cleats from the sheet pilesThe Customer is responsible for arranging for the cleats to be removed from the sheets. Options are:Return the sheets to Mabey Hire with the cleats attached – in which case a charge will be applicable, This option may be preferable if the requisite skills are not available on site.Remove the cleats on site by cutting through the welds, taking care not to cut into either the sheet piles or the cleats, and then dressing back any residual weld left on the sheets or brackets.

Mabey Hire do not design the thrust blocks required to transfer the prop loads into the adjacent ground. If Mabey Hire are providing equipment on a ‘design and supply’ basis then the Customer will be provided with the prop loads.Mabey Hire strongly recommend that the Customer appoints a competent person to design the thrust blocks as their size is often underestimated.Due to the large magnitude of the prop loads, it is unlikely that proprietary fixings will be able to transfer prop loads into a flat concrete base, therefore, additional measures may need to be taken. Examples of good and bad practice are shown below:

7. Restraint ChainsType : SHBP-189 : (Weight = 5.8KG)Detail 1 (Preferred) - Allowable chain capacity 2000kgDetail 2 (Substitute) - Allowable chain capacity 1600kg

Detail 1. Chainconnected to

lifting lug.

Detail 2. Chainwrapped aroundrail.

8. Cleats

9. Thrust Blocks

Forged hook for hanging over top of sheet piles.(not required if restraint chain is being used between frames)

2.0m chain length

'D' shackle'D' shackle for connecting to lifting lug

on waling or wrapping around rail

Cleat for Single Sided Excavation(SSBP-019) - Weight =23kg

450

120

450

Inclined face Shear Key Cantilever Dividag barBolted to flat base

XX

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Typical Installation and Removal Sequence for Schemes Similar to the One Shown in ‘Section 3. Typical Arrangement’ (Sheets Piles Pre-Driven) - (Other methods may be safe to adopt.)

Note : This method involves operatives working in an excavated area and the Customer must ensure safe work-ing conditions at all times.

10.

xiii. Remove raking props, rail, sheet piles and thrust blocks.

xiv. Complete backfill operation.

xi. Construct permanent works.

xii. Backfill with suitable fill and compact to the underside of the rail and the raking props.

vi. Cast thrust block of adequate size in position. (Refer to section 9)

Thrust block

x. Excavate to required level. (Ensuring no over dig.)

vii. Lift rail into position. Suspend rail using the restraint chains hooked onto the top of the sheet piles.

viii. Install the raking props and base fixings.

ix. Weld the cleats to the sheet piles.(Refer to section 8)

iv. Excavate to the reduced slope profile.

v. Excavate the pockets for the rail, the raking props and the thrust blocks. Ensure thrust block excavations are stable, this may require additional shoring equipment.

Reduced slope profile

i. Dig the rail in to the ground.

ii. Using the rail as a guide, drive the sheet piles to their final toe-in level (ensure correct orientation - refer to section 4.3)

iii. Remove the rail when driving is complete.

Existing Slope

Pocket for thrust block

Pocket for rail Pocket for

raking prop

PLAN VIEW OF EXCAVATION

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Suitable firm level dry areas should be made available on site for stacking and pre-assembly work.

Suitable lifting equipment of adequate capacity should be provided for off-loading, pre-assembly work, installa-tion and dismantling.

Slinging should always be carried out by suitably experienced and competent personnel.

Equipment weights are either provided in this user information or in other referenced user informations.

Return pre-assembled struts as supplied by Mabey Hire’s depot.

Stack all items in single layers wherever possible. If space does not permit this, the rails should be stacked on suitable 3” x 4” timbers in rows of 4 No. (max. height 3 rows.)

Important – Some of the special components are designed to pivot. Great care should be taken when handling pivot blocks in order to avoid trapped fingers.

Do…………………… ensure safe working conditions at all times.Do…………………… ensure lifting equipment and plant of adequate capacity are available for assembly & installation.Do…………………… use restraint chains between rail and top of sheets.Do…………………… install rails as level as possible with raking props square to the rail.Do…………………… ensure all bolts are fitted and tight – check regularly.Do…………………… ensure the raking props are securely anchored to the thrust blocks.Do Not……………… use restraint chains for lifting purposes.Do Not……………… use damaged equipment.Do Not……………... laterally load the raking props, either by hanging or propping from them or by acciden- tally striking them with site plant.Do Not……………… leave a gap equal to or greater than one sheet width between adjacent waler rails.Do Not……………… lift a rail from the excavation until backfilling/compaction has been carried out and the raking props have been removed.

Since our policy is one of continual improvement, components may vary in detail from the descriptions given in this publication.

11. Stacking and Handling

12. Do’s and Do Not’s

13. General