A Jetplus Inde

Single JET + Jet grouting solution

Date : 17/05/13 V1

Page 1 sur 13

Rev E

Marketing & Development page 1 This document and the information contained are confidential and intended solely for the use of the addresses. Dissemination, copying or disclosure of this document, either wholly or partially, is strictly prohibited without express approval.

1.

1.1.

Position of the technique

JET+ is a system to do jet grouting columns, using a special patented monitor with optimized flow (so with more focused jet).

What is JET+ ?

JET+ allows doing the same column with less energy than conventional jetting system. The table bellow gives the dynamic pressure (in bar) at distance varying from 0.5 to 2 m measured in air :

1.2.

The single JET+ allows pushing away the limits of the jet single. In some conditions, it can replace the double Jet.

Scope of application

The scope of soil for JET+ is the same than for standard Jet (sand, gravels, marl, peat, clay, silt). The scope of use for JET+ is equivalent to the normal jet (underpinning, break in/ break out, small retaining wall, jetted cut off...). It can be implemented particularly for jetted slab, doing bigger diameter.

Single JET+

Standard single Jet

Single JET+

Standard single Jet


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1.3.

Strength - weakness

Compressive layer

Soil improvement Umbrella vault

Underpinning Small retaining wall

Cut off Jet Grouting slab

Stan

dard

sin

gle

jet

Strengths- more efficient (less energy for same diameter) even with lower pressure (300 bars).- Less pressure losses in the monitor.- Better productivity (output)- Less cement consumption and less spoil production.

Weaknesses- Thicker spoil in clay (lower substitution ratio).- Too efficient for small columns in soft or loose soils.- Expensive monitor difficult to amortize on a small site- Monitor to be cleaned after each column (need of 2 monitors at least).

Sing

le J

ET +

Strengths- Almost as efficient for small diameter columns either in soft or stiff soils (no real improvement of efficiency with the air)- No use of pressured air (cleaner site, single jet rods, less risk of building or structure heave, less risk of pressured air pocket into the ground).- No spoil "drying effect" due to the air (especially when jetting above the water table).- More fluid spoil (higher substitution ratio).- Higher achievable strength.

Weaknesses- Less efficient for big diameter columns => lower productivity.- No air to ease the spoil return in case of deep columns.- Impossible to perform V-check in single rods (compared to SB double jet rods).- Expensive monitor.- Monitor to be cleaned after each column.

Stan

dard

dou

ble

jet


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Rev E


2.

2.1.

Site organization

The team is the same than for standard Jetting.

Team

2.2.

The installation for JET + (single / double) is the same than for standard Jet (single / double).

Installation

2.3.

Equipment single Jet+

Connection at top in 23/8 IF Connection at bottom in 23/8 API REG, possibility of 27/8 or 31/2. Usual nozzles from 4.5 to 6.5 mm (step of 0.5 mm). Maximum pressure : 40 MPa.

monitor body

bottom connection top connection

nut

nozzle monitor counter nut

674 mm dia 88.9 mm 28 kg

300 mm


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2.4.

2.4.1 drilling method for JET + :

Method statement single JET+

During drilling operation, the drilling fluid comes out through the tool at bottom, and a little through the nozzle. The injection fluid can be water, or bentonite or cement grout. During the jetting operation, the flow increases and closes the pressure valve (see picture) and all the flow comes out through the nozzle.

2.4.2 drilling tools : Drilling tools are the same than conventional drilling (nozzle bit, tricone etc).

2.4.3 controls : Diameter control can be done with CYLJET or with coring.

3.

All the shift costs, fixed costs and subsidiary costs are the same than for standard jet grouting site. The only monitor is different.

Cost elements

Jet + single monitor with the top and bottom connections # 5 600 Nozzle for Jet # 150

It is necessary to have 2 monitors on site (1 for work, 1 for cleaning/maintenance).

4.

The examples below are done with a maximum of data to help the understanding of the JET + process.

References

Drilling mode Jetting mode

nozzle

pressure valve

check valve


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France, Paris Louvre museum, - 2009

Presentation of work373 columns JET+ single

:

for retaining wall under piles built on XIXth

Drilling 2650 m / Jetting 2450 ml c.

Diameter 1400 / 1600 mm Average depth 6.55 m

Geotechnical data0 1.50 m : backfills

:

1.50 5.60 m : Alluviums Pl # 1.2 MPa at top Pl # 3.5 MPa at bottom 5.60 6.60 m : gravelly marl Water table is at 4.80 m from plate-form

Used techniqueEquipment : Beretta T46 & SM401 + pump SM7T450

:

Method : drilling downward with cement grout and jetting upward C/W Grout : 0.76 (600 kg/m3

Required strength : 5 MPa, ),

Jet parameters : Jet pressure 31 MPa nozzle 5.5 mm

Diameter (mm) 1400 1600 Top alluvium Bottom alluvium Bottom alluvium Flow (l/mn) 300 300 300 Up Speed (cm/mn) 22.5 22.5 13.8 Up step (cm) 3 3 3 Tempo (s) 6 9 13 Rotation speed (rpm) 10 7 9 Jet energy (MJ/m) 31 44 67

Obtained dataIndustrial production : 2.8 m/h or 3.3 columns/8h

:

Cement consumption : 880 kg / th jetted m 760 kg / column th m

3

Spoils : 162% / th jetted m

3

140% / column th m3

3


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UK, Birmingham - 2010

Presentation of work44 columns single JET+ & 30 columns double JET+

:

(test 1) for a jetted slab inside a shaft global overlapping between columns of 75% treatment between 17.50 m and 12.50 m

Geotechnical data0 17.50 m : silty gravely fine sand

:

STP : 20 to 30 Water table is at 2 m from plate-form

Used techniqueEquipment :klemm + SM 7T500J

:

Method : drilling downward with water and jetting upward Required strength : 8 MPa Jet parameters : nozzle 5.5 mm

Diameter (mm) 1650 2200 2750 Jetting system Single Double Double Grout cement content (kg/m3 800 ) 900 900 Grout C/W 1.08 1.26 1.26 Grout density 1.55 1.61 1.61 Grout flow (l/mn) 300 300 300 Grout pressure (MPa) 342 357 357 Step (cm) 3 3 3 Tempo (s) 28 14 20 Up Speed (mn/m) 15.56 7.78 11.11 Rotation speed (rpm) 9 10 9 Jet energy (MJ/m) 160 83 119

Obtained dataIndustrial production : 3.5 columns / 11 h

:

(drilling 60 m / 11 h & jetting 20 m / 11 h), Cement consumption : 1260 kg / th jetted m3 860 kg / column th m

, 3

Spoils : 236 % / th jetted m,

3

145 % / column th m,

3

On this site, the monitor has suffered excessive breakdown in JET+ double.

.


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Rev E


France, Strasbourg - 2011

Presentation of work22 columns JET+ single diameter 1200 mm

:

79 columns JET+ single diameter 1400 mm for foundation underpinning (existing and new foundations) Drilling up to 7.50 m, jetting on 6.30 m

Geotechnical data0 7.50 m : silty backfills

:

Pl # 0.1 MPa No water table

Used techniqueEquipment : Beretta T46 + SM 7T450

:

Method : drilling at down operation with water and jetting at up operation Required strength : 4 MPa Jet parameters : nozzle 5.5 mm

Diameter (mm) 1200 1400 Jetting system Single Single Grout cement content (kg/m3 550 ) 550 Grout C/W 0.69 0.69 Grout flow (l/mn) 305 305 Grout pressure (MPa) 315 315 Step (cm) 3 3 Tempo (s) 5 8 Up Speed (mn/m) 2.80 4.44 Rotation speed (rpm) 12 15 Jet energy (MJ/m) 27 43

Obtained dataIndustrial production : 3.5 columns / 8 h

:

Cement consumption : 1550 kg / th jetted m 1360 kg / column th m

3

Spoils : 165 % / th jetted m

3

155 % / column th m3

3


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Viet Nam, Ho Chi Minh M&C - 2010

Presentation of workDiaphragm wall joint treatment with JET + single columns

:

Maximum depth 30 m drilling & 10/12 m jetting

Geotechnical data0 30 m : clayey silty sand

:

SPT 30 to 35 Water table is at 4 m from plate-form

Used techniqueEquipment : local drilling rig + SM 5T302

:

Method : drilling downward and jetting upward Required strength : 5 MPa, Jet parameters : nozzle 5 mm

Diameter (mm) 800 1300 Jetting system Single Single Grout cement content (kg/m3 650 ) 650 Grout C/W 0.84 0.84 Grout flow (l/mn) 235 235 Grout pressure (MPa) 285 285 Step (cm) 4 3 Tempo (s) 4 11 Up Speed (mn/m) 1.70 6 Rotation speed (rpm) 15 11 Jet energy (MJ/m) 12 40


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France, Le Havre - 2011

Presentation of work171 half columns JET+ single diameter 1800 mm

:

for soil improvement near diaphragm wall in harbour Maximum depth 9 m drilling & 8 m jetting

Geotechnical data0 7 m : fine sand (no compact)

:

7 9 m : gravels Water table is at 7 m from plate-form

Used techniqueEquipment : PX1200A + SM7T450

:

Method : drilling downward and jetting upward Required strength : 1 MPa, Jet parameters : nozzle 5.5 mm

Diameter (mm) 1800 Jetting system Single, alternative Grout cement content (kg/m3 430 ) Grout C/W 0.5 Grout flow (l/mn) 260 Grout pressure (MPa) 220 Step (cm) 3 Tempo (s) 8 Up Speed (mn/m) 4.44 Rotation speed (rpm) 11 Jet energy (MJ/m) 25

Obtained dataIndustrial production : 5.9 columns / 8 h (7.5 m

: 3

Cement consumption : 580 kg / th jetted m jet /h)

260 kg / column th m3

Spoils : 130 % / th jetted m

3

104 % / column th m3

3


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USA, Manhattan 2010 Test 2

Presentation of work40 columns diameter 1500 in JET+ double

:

for building underpinning Maximum depth 36 m drilling & 31 m jetting

Geotechnical data0 5 m : backfills,

:

SPT 3 to 9, Qt 0.8 to 1 MPa 5 8.50 m : organics, SPT 0 to 3, Qt 0.8 to 1 MPa 8.5 18.5 m : silty sand, SPT 6 to 15, Qt 5 to 14 MPa 18.5 36 m : silty clay, SPT 4 to 14, Qt 4 to 10 MPa

Used techniqueEquipment : C14 + metax MP7

:

Method : drilling downward and jetting upward Requested strength resistance : 3.5 MPa, Jet parameters : nozzle 5.5 mm

Soil layers 5 to 8.50 m 8.50 to 18.50 m 18.50 to 36 m Grout cement content (kg/m3 650 ) 650 650 Grout C/W 0.83 0.83 0.83 Grout flow (l/mn) 210 290 320 Grout pressure (MPa) 160 300 365 Step (cm) 4 4 4 Tempo (s) 41 15 23 Up Speed (mn/m) 17.1 6.25 9.6 Rotation speed (rpm) 1.5 4 Jet energy (MJ/m) 56 54 111

Obtained dataIndustrial production : 1 column / 11 h

:

On this site, the monitor has suffered excessive breakdown in JET+ double.


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5.

Following the test on Birmingham and Manathan of double JET+, with a lot of breakdown of the monitor, a new elbow has been designed and manufactured, with improved sealing (tested at 450 b). This new monitor can be used for single or double JET+. A single JET+ monitor can be converted to a double JET+ monitor. Two new monitors have been successfully tested in the site of Lee tunnel. It seems that the problem is solved. It needs more sites to check with time now.

Opportunities

A removable rubber plate can be fitted on nozzle (or other system), to avoid plugging the nozzle.

6.

General sale approach :

Sale arguments

Focus the discussion with the customer around his need, argue of our differences and put forward his value creation.

Product : Jet grouting process.

Price : Cheaper than standard jet grouting, on large sites.

Position : CAB

Characteristic Advantage Benefit (customer) No air use in JET+ single No stress on the soil No risk of building heave

Less jetting energy for same diameter

Less fuel consumption Less human risk

More ecologic Quieter client

Bigger diameter with same energy Less columns Faster work

Less equipment for same target Less fuel consumption Less human risk Softer site Safety site


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Rev E


EnvironmentMore ecologic technology of single Jet+ in front of double Jet :

:

CO2 energy

,

transport, water waste spoil material

Promotion : Your large safe Jetting solution.

People : This product can be built for :

Small building promoters, Infrastructure directions, Industries, mines, Dam administrators.

In front of a buyer customer typology, refocus all time the discussion on technical matters and ask for a technical person during the meeting. Make the buyer worrying about existing buildings, resident problems, quality of the work. In front of a hitech customer typology, focus on the hitech patented monitor with good environment matters (less energy, less noise etc...), flatter his pride. In front of family customer typology, focus on the safety of the process, his quietness with residents (we will take care of them, less noise, less pollution, less vibration, no risk of uprising), the better quality, the environment.

Place : This product can be used for :

Underpinning Soil improvement between two strong layers Slope reinforcement Small retaining wall Cut off Umbrella vault

This technology is particularly adapted to replace double jet with single JET+.

SINGLE JET+ DOUBLE JET


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Rev E


7.

Business development : Bertrand Steff de Verninac

To go further

bertrand.steffdeverninac @soletanche-bachy.com Methods : Basile Leconte basile.leconte @soletanche-bachy.com, Equipment purchase : DMG, [email protected] Complete documentation : preventive maintenance, corrective maintenance, spare part book.

Support for jobsite : according to Groups conditions.

UPosition of the techniqueUWhat is JET+ ?/UScope of applicationUStrength - weakness

USite organizationUTeamThe team is the same than for standard Jetting.UInstallationUEquipment single Jet+UMethod statement single JET+2.4.1 drilling method for JET + :2.4.2 drilling tools :

UCost elementsAll the shift costs, fixed costs and subsidiary costs are the same than for standard jet grouting site. The only monitor is different.It is necessary to have 2 monitors on site (1 for work, 1 for cleaning/maintenance).

UReferencesThe examples below are done with a maximum of data to help the understanding of the JET + process./ France, Paris Louvre museum, - 2009UPresentation of workU :373 columns JET+ singlefor retaining wall under piles built on XIXPthP c.Drilling 2650 m / Jetting 2450 ml/Diameter 1400 / 1600 mmAverage depth 6.55 mUGeotechnical dataU :0 1.50 m : backfills1.50 5.60 m : AlluviumsPl # 1.2 MPa at topPl # 3.5 MPa at bottom5.60 6.60 m : gravelly marlWater table is at 4.80 m from plate-formUUsed techniqueU :Equipment : Beretta T46 & SM401 + pump SM7T450Method : drilling downward with cement grout and jetting upwardC/W Grout : 0.76 (600 kg/mP3P),Required strength : 5 MPa,Jet parameters : Jet pressure 31 MPa nozzle 5.5 mm/UObtained dataU :Industrial production : 2.8 m/h or 3.3 columns/8hCement consumption : 880 kg / th jetted mP3760 kg / column th mP3Spoils : 162% / th jetted mP3140% / column th mP3/ UK, Birmingham - 2010UPresentation of workU :44 columns single JET+ & 30 columns double JET+(test 1) for a jetted slab inside a shaftglobal overlapping between columns of 75%treatment between 17.50 m and 12.50 mUGeotechnical dataU :0 17.50 m : silty gravely fine sandSTP : 20 to 30Water table is at 2 m from plate-formUUsed techniqueU :Equipment :klemm + SM 7T500JMethod : drilling downward with water and jetting upwardRequired strength : 8 MPaJet parameters : nozzle 5.5 mm/UObtained dataU :Industrial production : 3.5 columns / 11 h(drilling 60 m / 11 h & jetting 20 m / 11 h),Cement consumption : 1260 kg / th jetted mP3P,860 kg / column th mP3P,Spoils : 236 % / th jetted mP3P,145 % / column th mP3P.On this site, the monitor has suffered excessive breakdown in JET+ double./France, Strasbourg - 2011UPresentation of workU :22 columns JET+ single diameter 1200 mm79 columns JET+ single diameter 1400 mmfor foundation underpinning(existing and new foundations)Drilling up to 7.50 m, jetting on 6.30 mUGeotechnical dataU :0 7.50 m : silty backfillsPl # 0.1 MPaNo water tableUUsed techniqueU :Equipment : Beretta T46 + SM 7T450Method : drilling at down operation with water and jetting at up operationRequired strength : 4 MPaJet parameters : nozzle 5.5 mm/UObtained dataU :Industrial production : 3.5 columns / 8 hCement consumption : 1550 kg / th jetted mP31360 kg / column th mP3Spoils : 165 % / th jetted mP3155 % / column th mP3/Viet Nam, Ho Chi Minh M&C - 2010UPresentation of workU :Diaphragm wall joint treatment with JET + single columnsMaximum depth 30 m drilling & 10/12 m jettingUGeotechnical dataU :0 30 m : clayey silty sandSPT 30 to 35Water table is at 4 m from plate-formUUsed techniqueU :Equipment : local drilling rig + SM 5T302Method : drilling downward and jetting upwardRequired strength : 5 MPa,Jet parameters : nozzle 5 mm/France, Le Havre - 2011UPresentation of workU :171 half columns JET+ single diameter 1800 mmfor soil improvement near diaphragm wall in harbourMaximum depth 9 m drilling & 8 m jettingUGeotechnical dataU :0 7 m : fine sand (no compact)7 9 m : gravelsWater table is at 7 m from plate-formUUsed techniqueU :Equipment : PX1200A + SM7T450Method : drilling downward and jetting upwardRequired strength : 1 MPa,Jet parameters : nozzle 5.5 mmUObtained dataU :Industrial production : 5.9 columns / 8 h (7.5 mP3P jet /h)Cement consumption : 580 kg / th jetted mP3260 kg / column th mP3Spoils : 130 % / th jetted mP3104 % / column th mP3/ USA, Manhattan 2010Test 2UPresentation of workU :40 columns diameter 1500 in JET+ doublefor building underpinningMaximum depth 36 m drilling & 31 m jettingUGeotechnical dataU :0 5 m : backfills,SPT 3 to 9, Qt 0.8 to 1 MPa5 8.50 m : organics,SPT 0 to 3, Qt 0.8 to 1 MPa8.5 18.5 m : silty sand,SPT 6 to 15, Qt 5 to 14 MPa18.5 36 m : silty clay,SPT 4 to 14, Qt 4 to 10 MPaUUsed techniqueU :Equipment : C14 + metax MP7Method : drilling downward and jetting upwardRequested strength resistance : 3.5 MPa,Jet parameters : nozzle 5.5 mm/UObtained dataU :Industrial production : 1 column / 11 hOn this site, the monitor has suffered excessive breakdown in JET+ double.

UOpportunitiesA removable rubber plate can be fitted on nozzle (or other system), to avoid plugging the nozzle.

USale argumentsPlace :

UTo go furtherBusiness development : Bertrand Steff de Verninacbertrand.steffdeverninac @soletanche-bachy.comMethods : Basile Lecontebasile.leconte @soletanche-bachy.com,Equipment purchase : DMG,[email protected] documentation : preventive maintenance, corrective maintenance, spare part book.Support for jobsite : according to Groups conditions.

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