With time, the evolution of anchors have led to different designs More than one anchor type may be suitable for a particular purpose Thus there are

Transcription

1 Supreme range of Soil & rock anchors

2 Introduction Used to anchor into concrete, masonry, stone With time, the evolution of anchors have led to different designs More than one anchor type may be suitable for a particular purpose Thus there are some salient features which need to be examined before choosing any anchor

3 Salient features while choosing an anchor Base material Design Load

4 Base Material Material being anchored to Can be concrete, brick, tile block, stone etc The type of fastener for the application is determined by it Stone & concrete has high load carrying ability (due to its strength and mass) Other base material, has much less mass to anchor to, thus much less strength Note: The holding power and the strength of the base material need to be known for proper anchoring

5 Type of Base Material Cohesive Fine grained soil. E.g. clay Non-cohesive Coarse grained soil. E.g. sand Each type can be further subdivided into 3 categories 1. Based on the origin of the soil 2. Method of deposition 3. Structure

6 Design Proper size hole for maximum efficiency of the mechanical anchor Proper spacing between the anchors Compressive strength of the base material Distance of the surface from the embedded end of the anchor

7 Loads Load types depending on the direction Tension applied parallel to the length of the anchor loads stress the fastener and the base material Shear perpendicular to the length of the anchor the depends on the anchor strength Complicated Combination of tension and shear Resultant load in some other direction

8 Loads Load Types depending on load movement Static Non moving loads Dynamic Vibration etc Causes the loosening of the anchor The load bearing of the anchor depends on Expansion force of the anchor Strength of the base material

9 Types of Anchors manufactured by us Helical Anchor Rock Anchor Expanding Anchors Cross Plate Anchors

10 Helical Anchor/ Helical Piers Design Features Application Advantages

11 Design features Design features Consist of central shaft made up of square or round rod transmits torque during installation transfers axial loads to the helical plates. also provide the resistance to lateral loading Helical shaped circular steel plate welded to the shaft Helical plates constructed with controlled pitch Causes more soil resistance during normal loading

12 Round Rod and Square Rod Round Rod Helix Anchor/ No- Wrench Screw Anchor Can be installed by hand or machine Much be installed at greater depth to reach firm soil Square Shaft / Wrench Type Screw Anchor Designed for heavy guy loading Extension Shaft is coupled for installation at proper depth

13 Applications Used as soil anchors for retaining walls to resist wind loads for tall structures Used for building foundations for new structures under pins for existing structures as support for broad walks, light posts etc

14 Advantages rapid installation immediate loading capability and resistance to both uplift and bearing loads high capacity application limited access installation

15 Rock Anchor Design Application Advantages

16 Design Designed of a threaded rod with turn buckle and two opposing wedge The rotation of the turn buckle forces the wedge against the sides of the rock, locking the anchor in place. Load increases the wedging force and the holding power.

17 Applications Used in bare solid rocks Used in thin soil with solid rock near the surface The anchor expands and wedges against the solid wall of the rock

18 Advantages Provide easy and efficient means of installation the greater the pull on the rod, the harder the anchor becomes wedged No concrete needed. Saves time Reduces labor Cost -effective

19 Expanding Anchor Design features Application Advantages

20 Design Features The multi-blade, one-piece top plated expands upon impact to form a cone shaped square distributes the anchor's holding power over a wide area builds up compression against an inverted pyramid of earth Base plate Supports the blades at the center Distributes the load uniformly over the blades Rib Provides additional reinforcement and strength

21 Application Compacted clay and gravel mixed, shale, broken rock, hardpan Compacted sand, clay pan, compacted gravel. Loose sand, gravel and clay, compacted coarse sand

22 Advantages Can be used in a variety of base materials Provide efficient and easy installation Cost -effective

23 Cross Plate Anchor Design Application Design

24 Design Simple design 2 plates made up of structural steel Welded at perpendicular to each other Plate edges are flanged to resist creeping. Rib for reinforcement provides extra strength

25 Application Compacted clay and gravel mixed broken rock Compacted sand, compacted gravel Loose sand, gravel and clay Clay loam, damp clay, loose coarse sand Silt loam, loose sand fines

26 Advantages Can be used in a variety of base materials Provide efficient and easy installation Cost -effective

27 Conclusions Further research are being carried out for better performance of the anchors Extensive tests are carried out to deliver quality products Installation manual for each of the anchors are also supplied for easy and efficient installation For details regarding the tests, installation, research or anything concerning the anchors, do contact us.