Ground Anchoring Complete solutions for HPTRM, Geotextiles, Transition Matting, Erosion Blankets and Landscaping Fabrics
- Time & Labour Saving - Immediate Performance - Lightweight and Flexible - Eliminates time-consuming crimping
“The Terra-Lock™ System has been developed for fast, easy installation and immediate security”
Gripple is renowned for providing innovative, cost-effective solutions for erosion control and soil stabilisation applications. The Terra-Lock™ System is provided in ready-to-use kits with combinations of Terra-Lock™ Anchors, Terra-Lock™ terminations and wire lengths specific to the project requirements and geotechnical conditions. The system provides immediate stabilisation, requires no crimping and is accompanied by a range of installation tools.
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5
4
6
2 1
1
HPTRM, with TL-100 & TL-A2
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2
HPTRM, utilising TL-P1
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HPTRM, with TL-406 & TL-A4
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Transition Matting, TL-304 & TL-A3
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ACBM, secured with TL-40A & TL-A4
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Terra-Lock anchor available in sizes: TL-A2, TL-A3 and TL-A4
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Terra-Lock™ System TL-100
TL-304
Secures TRM and HPTRM whilst promoting vegetation regrowth in erosion control and soil stabilisation applications
Two-piece design incorporating patented Gripple technology with a multi-purpose injection moulded load bearing plate
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Open face promotes vegetation regrowth 100 mm head size Accepts 3mm wire Zinc die-cast, one-piece housing Pre-assembled kit ensures time and labour savings Wire can be cut below grade
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Terra-Lock™ Anchors are designed to provide drive efficiency and maximum load capacity across a wide range of applications.
Terra-Lock™ Anchors are designed to provide drive efficiency and maximum load capacity across a wide range of applications.
TL-100 is available with the following Terra-Lock™ Anchors to suit your project specification:
TL-304 is available with the following Terra-Lock™ Anchors to suit your project specification:
TL-A2
TL-A2
TL-A3
TL-A4
Surface Area 1,940 mm² 225 kg
3,870 mm²
7,740 mm²
1,940 mm²
3,870 mm²
System Working Load 450 kg
450 kg
Ultimate Load 500 kg
TL-A3
Surface Area
System Working Load
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100 mm GF Nylon, UV stabilised, injection moulded plastic disc Accepts 3 mm wire Zinc die-cast housing Low profile design Pre-assembled kit ensures time and labour savings
225 kg
450 kg
Ultimate Load 800 kg
800 kg
500 kg
800 kg 5
TL-406
TL-40A
Two piece design incorporating a rubber coated steel bearing plate and a 4 mm wire tendon for higher load applications
Bespoke high load design for use with Articulate Concrete Block (ACB) installations
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High load rubber coated steel bearing plate 150 mm head size Accepts 4mm wire Zinc die-cast housing Pre-assembled kit ensures time and labour savings Wire can be cut below grade
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Terra-Lock™ Anchors are designed to provide drive efficiency and maximum load capacity across a wide range of applications.
Terra-Lock™ Anchors are designed to provide drive efficiency and maximum load capacity across a wide range of applications.
TL-406 is available with the following Terra-Lock™ Anchors to suit your project specification:
TL-40A is available with the following Terra-Lock™ Anchors to suit your project specification:
TL-A3
TL-A3
TL-A4
Surface Area 3,870 mm² 450 kg
7,740 mm²
3,870 mm²
7,740 mm²
System Working Load 680 kg
Ultimate Load 1200 kg
TL-A4
Surface Area
System Working Load
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Low-profile rubber coated steel bearing plate Accepts 4 mm wire Zinc die-cast housing Fits most common ACB appertures Pre-assembled kit ensures time and labour savings
450 kg
680 kg
Ultimate Load 1200 kg
1200 kg
1200 kg 7
Installation Tools TL-P1™
Anchoring
The high load anchoring pin is designed to hold all types of turf reinforcement matting, erosion blankets, geotextiles and landscaping fabrics.
We offer a range of tools to ensure that the Gripple Terra-Lock™ System is installed with ease and efficiency.
GPD
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• Gas-Powered Driver with proven reliability • No generators, compressors, air hoses or extension cords required • Lightweight & portable at only 15 kg (32 lbs) • Saves time, money, and energy
Up to ten times quicker to install Reduces labour costs associated with reworking loose pins Superior pull out performance compared to traditional pins and stakes Ensures close contact between the matting and soil Designed to eliminate damage to the mat Removes the need for a separate washer Easy installation with standard electric drill and bespoke chuck
JackJaw®
• Multi-tool functionality: extracts Drive Rods and load locks • Jaw and lever mechanism ensures ease of extraction • Smooth extraction without bending • Available with load cell for immediate testing
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• Purpose engineered for toughness and durability • Capable of penetrating the toughest soil • Features specific head profiles to match anchors
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Size (in)
8
Wire Cutters • Wire cutters for all diameters of wire supplied with our systems • Hardened jaws for durability
TL-P1™
B
Dimension
Drive Rod
A
B
C
35 mm
200 mm
50 mm
Standard Chuck
Extended Chuck
• For use when working close to the mat • Installs pins to full depth without damaging the mat • Fits general purpose 18v combi drill • Automatically disengages when TL-P1™ reaches full depth
• Designed for use where longer reach is required • Installs pins to full depth without damaging the mat • Fits general purpose 18v combi drill • Automatically disengages when TL-P1™ reaches full depth
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How It Works
The Terra-Lock™ System gains its stability through the creation of a truncated cone of soil. This consolidated mass provides the resistive securing body and is formed in two steps: Step One: After driving to the correct depth, the wire is tightened; this rotates the anchor so that the load bearing surface is parallel to the ground surface. Step Two: The wire is further tightened to compress the soil above the anchor’s bearing surface. The compression transfers towards the surface to form a cone of soil which prevents further anchor movement. The load bearing capacity of the system is determined by: anchor size, anchor depth and soil shear angle. Due to the complex interaction between these factors, it is advisable that a geotechnical report is utilised as part of the engineering plans to ensure the appropriate anchor size and drive depth are selected.
Step One: Step Two:
Installation
Technical Support Gripple provides engineering design support to ensure you specify the optimum Terra-Lock™ system to meet your project requirements. Once ground characteristics have been established, our technical team can calculate anchor loads and design performance; Whether through inititial site evaluation, preparation of technical drawings, supporting submittals or onsite testing to validate designs. The Gripple Technical Support Team can work with you at every stage of a project to realise the complete turn-key solution.
Step One:
Insert Drive Rod through the anchor and place against surface. 10
Step Two:
Use GPD to install the anchor at the required depth.
Step Three:
Use JackJaw to remove Drive Rod and load lock system. ®
Step Four:
Use Gripple Wire Cutter to cut wire below grade if required.
Submittals
CAD
Specifications
Testing
On-Site 11
Case Study
Case Study
Loyn Bridge, Lancashire
Cobnor Point, West Sussex
Client
Lancashire County Council
Client
ABP and Natural England
Contractor
LCC Operations
Contractor
Land & Water
Gripple Terra-Lock™ System
TL-100 & TL-A3 - Installed with Gripple Petrol Driver and JackJaw™. TL-P1 Installed With Drill & Chuck.
Gripple Terra-Lock™ System
TL-100 & TL-A3 - Installed with Gripple Petrol Driver and JackJaw™.
Application
Securing HPTRM for Slope Reinforcement
Application
Securing HPTRM for Slope Reinforcement
No. of Systems
150 TL systems, TL-100 & TL-A3 and 600 TL-P1
No. of Systems
-
Start to Completion
March 2015
Start to Completion
October 2014
Loyn Bridge, a three span narrow masonry arch bridging the river Lune between Hornby and Gressingham was at risk of damage due to erosion of the bank of the River Lune upstream. To armour the bank and ensure the continued structural integrity of the bridge whilst providing a finish in keeping with the stunning natural environment, the Terra-Lock™ System was installed by LCC Operations in conjunction with an erosion control geotextile. This was secured by an anchor trench at the crest of the slope and rock rolls at its toe. Cuttings from willow trees further upstream were planted through the geotextile to complete the installation. The Terra-Lock™ Anchor was installed quickly and easily using the Gripple Petrol Driver, and then instantly load-locked by the JackJaw™. The erosion control geotextile was secured in place with the integral TL-100 top termination, specifically selected as vegetation re-growth was a primary objective. Using the Terra-Lock™ System eliminated the need to crimp at the surface to secure the mat in place, reducing the contractor’s time on site. To improve intimacy between the geotextile and the newly seeded soil below, as well as to further aid re-establishment of natural vegetation, the patented TL-P1 high load pins were specified and deployed around the anchors. These were installed with a general purpose 18v combi-drill and bespoke chuck in less than half the time normally taken to install rebar pins or stakes, and provided superior pull-out loads. 12
Cobnor Point was identified as an area that suffered heavily from erosion. It could have been at risk of flooding, which would have affected the agricultural land and heritage features. In the past, the shoreline was defended using several different methods including large stones, sandbags full of cement and rip-rap. However, the area remained at risk from tidal flooding, providing reason to find an alternative and more secure solution. As a result, a new northern embankment was constructed and armoured using the Terra-Lock™ System and a type of erosion control mat. The matting extended across both sides of the embankment and terminated in a clay-filled trench at the toe of the wet side. The Terra-Lock™ Anchor enabled straightforward penetration of the mat without tearing or otherwise damaging it. The installation of the Terra-Lock™ Anchor provided immediate and effective stabilisation of the mat. This was further reinforced by the TL-100, helping to maintain intimate contact between the mat and subgrade surface. Similarly, the open face of the TL-100 allowed for vegetation re-growth and presented an ideal solution to preserving the natural appearance of the eroding shoreline. The project benefited from the wide range of installation tools including the Drive Rod, JackJaw® and the Gripple Petrol Driver. Paired with the TerraLock™ System, the overall install time was reduced to a minimum. 13
Case Study
Case Study
Blackmoss Reservoirs
Hillsboro Canal, Package 2
Client
Askam Construction - Civil Engineering Division on behalf of United Utilities
Contractor
GHA Livigunn
Gripple Terra-Lock™ System
TL-100 TL-A3
Application
Securing HPTRM for Slope Reinforcement
No. of Systems
420 Systems (TL-100, TL-A3) Area equal to 2100 m
Start to Completion
February 2013
Two dwellings situated below the Blackmoss Reservoirs in Barley, Lancashire were identified as at risk from flooding should either or both reservoirs burst their banks after heavy rainfall. The Terra-Lock™ System was installed in conjunction with an erosion control mat to reinforce the slope that was situated in the new flood water path. The objective of the project was to create a new emergency spillway below the reservoirs. Any flood waters would be directed away from the dwellings and in to an existing waterway, so they could drain safely. The site included an area significantly steeper than the surrounding land and formed part of the route for diverted flood water. Due to the severe incline, passing flood water could reach speeds of approximately 6 m3 per second. The area could not be reinforced by planting trees, as this method would impede water flow and take an unacceptable amount of time to become effective. The specification required the mat to be mechanically anchored and the Terra-Lock™ System was selected to prevent uplift, protect the subsoil and withstand the high flows in the event of a breach. The ease and speed of installing the Terra-Lock™ System provided a quick and secure solution. The open face of the TL-100 would allow vegetation to grow through over the course of the product’s 50 year design life, so that when the root systems began to establish themselves, the Terra-Lock™ System would support rather than compete with natural securing methods. 14
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Client
South Florida Water Management District
Contractor
Metro (Prime), B&Z (Sub)
Gripple Terra-Lock™ System
TL-A2, 3 mm (1/8”) Stainless Steel Wire, TL-100 (HPTRM) TL-A4, 4 mm (5/32”) Stainless Steel Wire, D4 & TL-40A (25 ft ACBM) TL-A4, 4 mm (5/32”) Stainless Steel Wire, D4 (12 ft ACBM)
Application
Securing ACBM and HPTRM
No. of Systems
8,500 Systems (4,000 with D4, 1,500 with TL-40A, 3,000 with TL-100)
Start to Completion
Oct 2013 - Nov 2014
The Hillsboro canal is managed by the South Florida Water Management District and forms one of the local flood control system’s main arteries. Following regular inspection, a 10.5 mile reach was identified as being in need of significant repair where sections of the bank had eroded and fallen into the canal. This presented problems to local infrastructure and homes which run parallel to the eroding banks. A solution was chosen to ensure functionality of the canal for decades into the future. It was decided that the lower portion of the slope was to be armoured using ACBMs which extend below the waterline. Above the ACBM, where turf alone provides insufficient erosion protection, HPTRM was used. In both instances, the Gripple Terra-Lock™ System was chosen to provide ease of install and a high factor of safety. Owing to the specific requirements of the two matting products, a broad Gripple Terra-Lock™ System was employed utilising: TL-100, D4 and TL-40A (ACBM Plate) as terminations. The hard, underlying soil contained coral rocks and presented tough driving conditions. However, use of the Gripple Petrol Driver (GPD) eased installation and allowed a drive depth of 1.2 m (4 ft) to be achieved. Each of the anchors was subjected to a load test requiring at least 80 kg (180 lbs) of pullout. The Terra-Lock™ System passed all tests as part of this process and provided the safety required even under tough conditions. The broad system used on site benefited from a wide range of install tools including: GPD, JackJaw®, Drive Rod, D4 Tensioner and Wire Cutters. 15
Case Study
Case Study
Five Mile Creek
C-41A Repair, Okeechobee
Client
County of St. Lucie
Client
South Florida Water Management District
Contractor
Murray Logan (Prime), TNT Construction (Sub)
Contractor
Dickerson (Prime), B&Z (Sub)
Gripple Terra-Lock™ System
TL-100 3 mm (1/8”) Zinc Aluminium Wire TL-A2
Gripple Terra-Lock™ System
TL-100 3 mm (1/8”) Stainless Steel Wire TL-A2
Application
Securing HPTRM
Application
Securing HPTRM
No. of Systems
5,000
No. of Systems
5,000
Start to Completion
Jan 2014 - May 2014
Start to Completion
May 2014 ‐ June 2014
Five Mile Creek is a water management canal which protects local homes by acting as a vital flood defence. Previously the banks had been armoured with HPTRM, however this was secured using only straight pins with a low pullout resistance. Following an intense rainfall event in which 457 mm (18”) of rain fell over 12 hours, the river level rose dramatically, broke its banks and flowed into homes. During this event, the armoured slopes had sloughed and lost much of their integrity. Clearly a system with a higher factor of safety was required. To correct the failed slopes and provide protection into the future, the banks were first re-graded, then armoured with rip rap at the toe and HPTRM up to the head. The high flow velocity of the channel necessitated increased pullout resistance of securing methods. As a result, the Gripple Terra-Lock™ System was chosen to secure the HPTRM and provide an additional factor of safety. This system has subsequently been proven to be effective, holding under a 203 mm (8”) rainfall event. The sandy soil meant that the TLA-2 anchors were easily drivable to a depth of 1.2 - 1.8 m (4 - 6 ft) and comfortably met the required 70 kg (150 lb) pullout resistance. The installation process was eased through use of Gripple installation tools including; GPD, JackJaw®, Drive Rod and Wire Cutters. On
this site the JackJaw® was of particular importance, allowing for straightforward extraction of the Drive Rod.
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C-41A, Okeechobee, Florida, is a major waterway managed by the local water management district. The local soil is extremely soft and consists mainly of very fine sand and silt. As a result, erosion is a constant issue as it causes major damage to the banks of the waterway as well as heavy siltation of the channel which could damage local habitats and infrastructure. As part of a previous conservation project, the banks were protected using HPTRM. The mat on this occasion was laid using only rock ballast at the head and toe. This was then overlaid with turf. Subsequent to the work, the rocks at the bottom of the slope had been washed away, which then led to the HPTRM floating up and losing any effectiveness by exposing the toe to undermining. A more secure solution was provided by the Gripple Terra-Lock™ System. This time when the HPTRM was installed, anchors were placed underwater at the toe and all along the slope to the head. This ensured the HPTRM maintained intimate contact with the subgrade surface, thus providing the erosion protection required. The system makes use of the time saving, purpose-designed TL-100 which provides security, aids the ease of installation and has minimal impact on vegetation growth. This component coupled with the range of Gripple Installation Tools ensures a swift, straightforward and correct set up is achieved every time. 17
Other Gripple Products In addition to Civil Construction, we cater for Industrial Construction and Agricultural applications. Components from these ranges have been found to complement and further broaden our system, including:
Rock Anchor
Case Study
• Stand alone anchor incorporating top termination • For use in rock or hard soil • 750 kg Ulitmate load
Prima Feeder Canal, Arizona Client
Gila River Indian Community
Contractor
Weeminuche Construction Authority
Gripple Terra-Lock™ System
TL-100 3 mm (1/8”) Zinc Aluminium Wire TL-A2
Application
Securing HPTRM
No. of Systems
350
Start to Completion
December 9 -12, 2013
Rootball Kit • Simple and fast installation • Allows tree to naturally establish itself • Aesthetically pleasing • Reduced trip hazard - anchoring is underground • Deters vandals - no sign that tree is newly planted • Can be installed using Gripple Petrol Driver or manually • Available in ready-to-use kits
The Central Arizona Project directs water through a number of canals extending from the Colorado River into particularly arid regions within the state. Canal realignment construction was completed in 2011. Since the completion of the project, graded slope areas around the perimeter of the outlet structure of the Prima Canal have experienced substantial erosion. As a result, the area was designated for repair and protection using erosion control matting. Although degradable short term rolled erosion control products were initially discussed, it was suggested that an anchor reinforced vegetation system utilising HPTRM was to be used to extend design life. As part of this solution, the Gripple Terra-Lock™ System was used as a method to add security to the matting. The System employs a number of elements which aid installation ease, reduce installation time and provide a bespoke solution for the securing of HPTRM. Central to this system is the Terra-Lock™ Anchor (TLA-2), the design of which enables straightforward penetration of the mat without tearing or otherwise damaging it. On this project the required 0.9 m (3 ft) drive depth was reached with ease through use of the GPD and Drive Rod. The TL-100 top termination secures the matting in place and by utilising patented Gripple technology, is able to secure the wire under load without the need for time consuming crimping.
Tensioning tool
Dynamic range
• Eases tensioning and re-
• A fast-locking wire tensioner with push-fit technology • Easy and secure method of anchoring and bracing • One action locks both wires simultaneously
tensioning of wires • Contractor grade tool with an all-metal construction for added durability and strength
The open face of the TL-100 allows vegetation to grow through, so that when the root systems begin to establish themselves, the Gripple Terra-Lock™ System supports rather than competes with natural securing methods. 18
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