Geosense Quick Joint User manual

V1.4 March 15
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INCLINOMETER
CASING
QUICK JOINT (QJ)

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V1.4 March 15

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V1.4 March 15
CONTENTS
Page
1.0 INTRODUCTION 5
1.1 Applications 5
1.2 Advantages 5
2.0CONFORMITY 6
3.0 MARKINGS 6
4.0DELIVERY 7
4.1 Packaging
4.2 Handling
4.3 Inspection
4.4 Storage
5.0 COMPONENTS & ASSEMBLY 8
5.1 QJ Casing sections 8
5.2 End caps 10
5.2.1 Standard cap 10
5.2.2 Grout valve cap 10
5.2.3 Grout anchor cap 11
5.2.4 Grout anchor with valve cap 11
5.2.5 Top cap 12
5.2.6 Protection 12
5.3 Telescopic joint 13
5.4 Repair coupling 14
5.5 GXM 300I Combined settlement system 15
6.0 INSTALLATION PLANNING 16
6.1 Installation considerations - all install types 17
6.2 Alignment
7.0 INSTALLATION - VERTICAL BOREHOLE 17
7.1 Borehole depth & cleanliness 17
7.2 Installation overview 18
7.3 Buoyancy 19
7.4 Grouting 19
7.5 Grouting methods 21
7.5.1 Pre-grouting with external grout pipe 21
7.5.2 Post-grouting with external grout pipe 22
7.5.3 Post-grouting with a grout valve 23
7.6 Installation procedure 24
7.6.1 First section 24
7.6.2 Subsequent sections 26
7.7 Orientation 28
7.8 Removing temporary casing 28
7.9 Protection 28

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CONTENTS
Page
8.0 INSTALLATION - VERTICAL FILL 29
9.0 INSTALLATION - HORIZONTAL 30
9.1 Preparation for installation 30
9.2 Within re-bar cage 31
9.3 Dead-end pulley 33
9.4 Within trench 33
10.0 SPECIFICATION 34
11.0 SPARE PARTS 35
12.0 RETURN OF GOODS 36
13.0 LIMITED WARRANTY 37

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It is VITAL that personnel responsible for the
installation and use of Inclinometer Casing READ and
UNDERSTAND the manual, prior to working with the
equipment.
1.1 Applications
Geosense®QJ (Quick Joint) Inclinometer Casing is for use with inclinometer
systems for monitoring stability & movement of:-
• Slopes
• Embankments
• Diaphragm & sheet piled walls
• Deep foundations
• Tunnelling operations
• Piles
• Pre-loads
• Deep excavations
Manufactured from high impact virgin ABS material, it has four internal grooves formed at
90 degrees into the internal surface into which inclinometer probes (Portable or In-Place)
can be inserted to carry out profile monitoring of the casing which will deform with any
ground movement.
It is available in standard 3 & 1.5 metre lengths with QJ (Quick Joint) flush couplings at
each end which can be easily pushed together to provide a watertight self locking joint
while maintaining precise groove alignment and high collapse resistance.
Geosense®QJ Inclinometer Casing can be installed vertically, inclined or horizontally in
boreholes, embedded in fill material, cast into concrete or attached to structures.
1.2 Advantages
QJ Inclinometer Casing requires no special tools, glues or rivets for installation resulting
in much faster installation, especially in deeper installations.
As it is flush coupled it can be installed in smaller boreholes and utilised in combination
with magnetic settlement systems.
1.0 INTRODUCTION
This manual is intended for all users of Quick Joint (QJ) Inclinometer Casing
manufactured by Geosense®and provides information on installation, operation and
maintenance.

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2.0 CONFORMITY
This product is NOT covered by any CE directives and therefore CANNOT be CE marked.
3.0 MARKINGS
QJ Inclinometer Casing is labelled with the following information:-
• Manufacturers website address
• Manufacturers telephone number
• Direction of installation arrows
• Batch number

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4.3 Inspection
It is important to check all the equipment in the shipment as soon as possible after
taking delivery and well before installation is to be carried out. Check that all the
components detailed on the documents are included in the shipment. Check that the
equipment has not been physically damaged.
IF COMPONENTS ARE MISSING OR DAMAGED, CONTACT
THE DELIVERY COMPANY, THE SUPPLIER AND GEOSENSE®.
4.4 Storage
QJ inclinometer Casing should be stored in the protective cardboard boxes in an
environment that is protected from weather and direct sunlight.
Boxes may be stacked up to a maximum of six high.
4.0 DELIVERY
This section should be carefully read by all users of Geosense®QJ Inclinometer
Casing.
4.2 Handling
Whilst QJ inclinometer Casing is tough and durable, care should be taken when
handling so as not to damage it by dropping it or dragging the machined ends on
hard surfaces.
The female end is fitted with an O-ring and care should be taken when handling to
ensure that this is not removed or disturbed.
4.1 Packaging
QJ Inclinometer Casing is packed in protective cardboard boxes for transportation
to site. Packaging is suitably robust to allow normal handling by transportation
companies. Inappropriate handling techniques may cause damage to the packaging
and the enclosed equipment. The packaging should be carefully inspected upon
delivery and any damage MUST be reported to both the transportation company and
Geosense.

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It is VITAL that personnel responsible for the installation and
use of the QJ Casing READ and UNDERSTAND the manual,
prior to working with the equipment.
**********
As stated before, it is vital to check all the equipment in the shipment soon after
taking delivery and well before installation is to be carried out. Check that all
components that are detailed on the shipping documents are included.
5.0 COMPONENTS & ASSEMBLY
This section of the manual is intended for all users of Geosense®QJ Inclinometer
Casing and is intended to provide guidance with respect to its installation.
It must be remembered that no two installations will be the same and it is inevitable
that some ‘fine tuning’ of the following procedures will be required to suit specific site
conditions.
5.1 QJ Casing sections
Each section of the QJ Inclinometer Casing has a male end with a locating peg and
a locking ring and a female end with a keyway, O-ring and locking groove.
1. Locating peg
2. Alignment slot
3. External locking ring
4. Internal locking groove
5. Internal O-ring
6. Installation direction arrow
1
3
2
5
4
6

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5.0 QJ sectios contd..
QJ INCLINOMETER CASING SHOULD BE
INSTALLED WITH THE MALE END
DOWNWARDS
Lengths of Casing should be joined together as follows:-
STEP 1
Place male end into female end with locating peg on the
male end aligned with the keyway on the female end.
THE FEMALE END HAS A FACTORY
GREASED O-RING. CARE SHOULD BE
TAKEN TO PREVENT EITHER END OF THE
CASING BECOMING CONAMINATED WITH
DEBRIS WHICH WILL AFFECT THE SEAL
STEP 2
Push home the male joint into the female until it has
“snapped” together (the load required to snap together is
approximately 37 KgF)
ONCE QJ INCLINOMETER CASING IS
“SNAPPED” TOGETHER IT
CANNOT BE UNDONE

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5.2 End caps
Before installing the QJ Inclinometer Casing a bottom
cap should be fitted. Various options are available as
follows:-
5.2.1 QJ standard end cap (A)
To be used where no problems with uplift are expected
and a separate external Tremie tube is to be used.
5.2.2 QJ grout valve cap (B)
Used in small boreholes where there is no room for
external Tremie pipes.
The cap has a non-return valve and perforated pipe
fitted to the end cap (1).
The grout pipe fitted on the bottom with a female
Quick-Connect coupling (2) is lowered through the
inclinometer Casing and couples to a male
Quick-Connect coupling (3) in the cap.
Grout is pumped through the pipe into the base of the
borehole filling it from the base.
The grout pipe is removed after grouting completed.
A
B
B
1
2
3

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5.2 End caps contd..
As an alternative to steel rods or drill Casing being in-
stalled to the base of the Casing to counteract buoyancy,
anchors can be used.
They can be either a standard anchor which can be used
with external grout pipes or a combination anchor/grout
valve.
Installation of the Casing procedures are the same as pre-
viously described.
5.2.3 QJ anchor cap (C)
Used to control uplift due to buoyancy of water and grout.
The anchor is fitted with sprung loaded arms which grip to
the side of the borehole and prevent uplift.
5.2.4 QJ anchor cap with grout valve (D)
As 5.2.3 above but fitted with an integral grout valve as in
5.2.2
THE APPROPRIATE END CAP TYPE
SHOULD BE CHOSEN ACCORDING TO THE
APPLICATION
IF IN DOUBT PLEASE
CONTACT GEOSENSE FOR ADVICE
JOIN TOGETHER AS DESCRIBED ON PAGE 7
C
C

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5.2.5 Top cap
Once all the inclinometer Casing sections have been
installed it is recommended that a removable push fit top
cap be fitted to protect the installation from the ingress of
debris.
5.2.6 Protection
In order to protect the complete installation from damage
it is recommended that a steel protective steel cover be
placed over the top and concreted in.

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5.3 Telescopic joint
Telescopic joints are generally used in situations where man made fills are constructed such
as embankments and dams and should be used where settlements of over 2% are
expected. Total settlement up to 30% can be accommodated.
Each telescopic joint allows for 150mm vertical movement thus avoiding any buckling of the
Casing due to excessive axial loading.
Positions and quantities of telescopic couplers should be calculated in accordance with the
ground conditions of each installation.
Telescopic joints are 700mm long and can accommodate
150mm of compression (settlement) or extension (heave).
They are usually supplied in the fully extended version
(see right) to allow for settlement but can be altered on site
by loosening the four screws and re-positioning the ends.
Telescopic joints are installed using the same method of
installation as Casing lengths. Please see the installation
section for installation methods.
75mm
travel
75mm
travel

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5.4 Repair coupling
In the event that a section or end joint becomes damaged
it can be repaired using a special repair coupling as
Follows:-
STEP 1 - cut off the damaged part of the Casing as square
as possible and remove all burrs.
STEP 2 - apply ABS solvent cement to the outside of the
Casing and slide the repair coupling onto the Casing and
allow the solvent cement to fully cure.
ENSURE THAT THE EXTERNAL RIBS ON
THE CASING AND REPAIR COUPLING ARE
ALIGNED AS WELL AS THE INTERNAL
GROOVES
Align external ribs

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5.5 GEO-XM 300I settlement
Geosense®QJ inclinometer Casing can also be used
as part of the GEO-XM 300I magnetic settlement
system.
An outer corrugated sleeve is used to isolate the
inclinometer Casing from any settlement in the
surrounding ground so eliminating ay axial loading onto
the
inclinometer Casing (see GEO-XM 300I manual for
installation details).

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BEFORE STARTING INSTALLATION CHECK TO ENSURE CASING HAS
NOT BEEN DAMAGED DURING TRANSIT OR STORAGE
DO NOT PRE-ASSEMBLE CASING LENGTHS BEFORE INSTALLING
6.0 INSTALLATION PLANING
6.1 Installation considerations - all types
Prior to installation of Geosense®QJ Inclinometer Casing it is essential to establish
and confirm details of the installation to be carried out. Some of the main considerations
are listed below :-
1. Intended elevation and depth
2. Installation type (borehole, fill, horizontal)
3. Grouting method (pre-grout, post grout, internal tremie tube etc.)
4. Borehole/location
5. Tools
Obtain any tools necessary to carry out the installation. The following is a brief list of
tools typically used during the installation of QJ Inclinometer Casing.
• Shovel for placing and levelling fill by hand
• Duct tape
• Hand Saw
• Chain or Casing Clamps
• Drill rods
• Grout Tremie Line
• High shear grout mixer and pump
6. Equipment Needed
• QJ Inclinometer Casing
• Relevant bottom cap
• Push on top cap
• Clean Water Supply (to ballast Casing)
• Repair Coupling
• Casing Collar Protection (if needed)
• Spare Casing/caps

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7.0 INSTALLATION - Vertical borehole
7.1 Borehole depth & cleanliness
The borehole should be drilled as vertical as possible, preferably within 1 degree.
Once drilled to final depth the borehole should be flushed out with clean water and checked
that it is open to the bottom.
CHECK THE DEPTH BEFORE INSTALLING
ENSURE DEPTH ALLOWANCE FOR GROUT VALVES IF USED
6.2 Alignment
One set of grooves should be aligned with the expected direction of movement as below.
NEVER TRY TO TWIST OR PUSH THE CASING FROM THE TOP AS THIS
WILL CAUSE TORSION, TWIST AND SPIRALLING OF THE GROOVES
Direction of expected
ground movement
Groove alignment

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7.2 Installation overview
It is recommended when installing into a vertical borehole, to use pipe clamps to install QJ
Inclinometer Casing as there may be a risk of loosing the Casing down the borehole.
In dry boreholes (particularly deep ones) a safety line should be attached to the base of the
Casing to provide additional security and a way to retrieve the Casing if necessary.
Install the Casing as follows:-
1.) Attach clamp A to the first section of the Casing and lower into the borehole until the
clamp rests on the top of the borehole.
2.) Attach clamp B to a suitable location on the next section of the Casing so it can be used
to push down and “snap” together the two sections. Reposition the clamp to the top of the
Casing.
3.) Remove clamp A and lower the new section into the borehole until clamp B rests on the
top of the borehole.
4.) Remove clamp A and repeat as per step 2. Repeat alternating clamps A & B until
installation is complete.
ONCE THE CASING IS INSTALLED TO DEPTH IT IS SUGGESTED TO USE A
DUMMY/INCLINOMETER PROBE TO CONFIRM THE CASING IS FREE
FROM OBSTRUCTION.
QJ Casing
Bottom cap Casing clamp
Top cap

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7.3 Buoyancy
QJ Inclinometer Casing will be buoyant if the borehole is filled with water or grout and
should therefore be filled with water to counteract this. The addition of grout to the borehole
will however make the Casing become buoyant again as grout is denser than water and
becomes worse the denser the grout used.
If buoyancy is expected to be a major problem casing anchors can be used or weight can be
applied at the base of the casing by installing a steel pipe or drill rods.
DO NOT APPLY WEIGHT TO THE TOP OF THE CASING AS THIS WILL
PUT THE CASING UNDER COMPRESSION AND DISTORT ITS PROFILE.
PLACE ANY WIEGHT INSIDE THE CASING AND AT THE BASE.
7.4 Grouting
Grouting is required to connect the surrounding ground to the inclinometer Casing and the
grout mixture should be mixed to match the strength and deformation properties of the
ground. The design of the grout is the responsibility of the Site Engineer.
Grout equipment should comprise of the following:-
• Grout mixer
• Grout pump
• Pipe or hose for Tremie or grout valve method
DO NOT MIX GROUT MANUALLY
USE A PROPER HIGH SHEAR GROUT MIXER AND PUMP
Correctly mixed grout must be of a “just pump able” consistency but thick enough to set in a
reasonable time and be free of lumps. If the mixture is too watery excessive shrinkage will
occur leaving the upper part of the borehole un-grouted.
During the grouting process care should be taken to balance the differential pressures
between the inside and outside of the Casing and it is also important to monitor the water
level in the Casing.
When mixing the grout add the cement to the water first and then add the Bentonite to the
correct consistency. If the grout is too thin the solids and the water will separate. If too thick
it will be difficult to pump.

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7.4 Grouting contd…
Grout strength decreases with water-cement ratio and controlling this ratio is the most
important factor for grouting and it is therefore recommended that the water and cement is
mixed first. Water and cement ratios greater than 0.7 - 1.0 by weight will segregate without
the addition of Bentonite or other filler to keep the cement in suspension and it is
recommended that Bentonite normally be used as it is readily available.
The tables below provide guidelines for typical mixes that may be adopted for varying soil
types but are only a guideline and the installer should request the project specification from
the Engineer.
Other compounds can be added to the grout mixture to alter its characteristics:-
• Expanding agents are added to introduce small bubbles into a cement and water mix
as it cures to prevent it from shrinking.
• Plasticisers can be added to a mixture to allow it to flow more freely through small
bore pipe work.
• Fillers are added to provide weight and / or bulk to the mixture for use where grout
may have a tendency to flow through the borehole walls.
Materials Unit Weight ratio Unit
Cement (OPC) 50Kg 1 50 Kg
Bentonite 15 Kg 0.3 15 Kg
Water 125 Lit 2.5 225 Lit
Weight ratio
1
0.3
4.5
Unit Weight ratio
50 Kg 1
20 Kg 0.4
325 Lit 6.5
HARD SOILS MEDIUM SOILS SOFT SOILS