The Grouted Rock Anchor provides permanent anchoring in fractured rock where traditional screw or wedge anchors fail. A forged knob at one end creates an interference fit with grout, enhancing holding capacity through bond stress between rock and grout. The anchor installs inline with guy wires to optimize tensile load resistance and features hot-dip galvanized finishes per American Society for Testing and Materials (ASTM) A-153 for corrosion protection.
Applications include stabilizing utility poles, supporting foundations in rocky soils, and providing tiebacks for bridges and towers. The anchor also serves in slope stabilization, excavation support, and resisting uplift forces in permanent retaining walls across civil engineering and mining projects.
Installation begins with drilling a 6-inch diameter hole into solid rock. After inserting the anchor with any required round rod extensions and guy adapter, Portland-cement grout (ASTM C-150 types I, II, III, or V) fills the space around the anchor. Water-to-cement ratios between 0.4 and 0.45 ensure proper consistency, with grout requiring approximately five days to cure before tensioning. The grout must achieve 3000 psi compressive strength at stressing.
Specifications include rod diameters of 0.75 inch and 1.25 inch with ultimate tensile capacities ranging from 23,000 lbs to 70,000 lbs. Alignment within 5 degrees of guy load is critical, with minimum installation depth of 12 inches in solid rock recommended. Extensions and couplings enable customization for specific project depths and load conditions.
RaxPower Grouted Rock Anchor Wholesaler with 20+ Years of Expertise
RaxPower is an experienced manufacturing and trading company specializing in the research and development, production, and sales of grouted rock anchors and other pole line hardware. As a full-service partner, we provide turnkey solutions for rock stabilization and ground improvement. We are committed to offering outstanding customer service and competitive market prices, guided by a philosophy of quality first and customer satisfaction, aiming to exceed the most demanding international technical approvals.
Product Features
The Grouted Rock Anchor is designed for use in fractured rock conditions where other anchors are ineffective. It features hot-dip galvanizing per international standards, ensuring corrosion resistance and high tensile strength for reliable performance in earth tension anchoring applications.
Expertise
With over 20 years of experience, our team of professional engineers and technicians leverages advanced knowledge in geotechnical solutions to deliver innovative and cost-effective outcomes for projects worldwide.
Manufacturing
We utilize sophisticated hot forging technology and automated processes in our extensive production facilities, ensuring greater strength, accurate sizing, and uniform quality for every grouted rock anchor.
Quality
All products undergo strict quality control, including:
- raw material selection
- multi-stage testing
- validation through an independently accredited material testing laboratory certified to ISO-IEC17025
Our galvanizing processes adhere to ISO 1461, with mean coating thickness exceeding 85 microns for durability.
Consult us for more information on how our Grouted Rock Anchor can meet your specific project needs.
| Parameter | Value |
|---|---|
| Product Type | Grouted Rock Anchor |
| Application | Stabilizing utility poles, supporting foundations in rocky soils, tiebacks for bridges and towers, slope stabilization, excavation support, resisting uplift forces in permanent retaining walls |
| Material | Steel |
| Finish | Hot-dip galvanized per ASTM A-153 |
| Rod Diameter | 0.75 in, 1.25 in |
| Ultimate Tensile Load | 23,000 lbs to 70,000 lbs (depending on diameter and configuration) |
| Drilled Hole Size | 6 in diameter |
| Minimum Installation Depth | 12 in in solid rock |
| Alignment Tolerance | ±5 degrees from guy load |
| Grout Type | Portland-cement types I, II, III, or V per ASTM C-150 |
| Water-to-Cement Ratio | 0.4 to 0.45 |
| Grout Compressive Strength | 3000 psi at time of stressing |
| Curing Time | Approximately 5 days |
| Extension Couplings | Compatible with RR, SS5 types |
| Corrosion Protection | Hot-dip galvanized |
| Centralizers | Recommended for adequate grout cover |
Frequently Asked Questions
What is a grouted rock anchor and when should it be used?
A grouted rock anchor is a robust anchoring solution designed for fractured rock environments where traditional screw anchors are ineffective and wedge-style anchors cannot be used. It stabilizes utility poles and supports structures in rocky terrains by enhancing stability through grouting.
What are the key installation steps?
Installation involves drilling a 6-inch diameter hole into solid rock, inserting the anchor assembled with any necessary extensions (such as RR or SS5 couplings), and pumping Portland-cement grout to completely fill the hole around the anchor. The grout takes approximately five days to cure fully, ensuring optimal strength and performance.
What materials are recommended for grouting and what are the specifications?
A flowable neat cement grout is required, specifically Portland-cement Type I, II, III, or V conforming to ASTM C-150. The recommended water-to-cement ratio is between 0.4 and 0.45. The grout must achieve a compressive strength of 3000 psi at the time of stressing.
What are the standard sizes and load capacities?
Standard sizes include rod diameters of 3/4 inch and 1 inch, with ultimate strengths of 23,000 lbs and 36,000 lbs respectively. Specific models have tensile strengths up to 70,000 lbs. The drilled rock hole size is typically 2.00 inches for certain catalog numbers, and the minimum installation depth is 12 inches in solid rock.
How does alignment affect the anchor's strength?
The grouted rock anchor must be installed inline with the guy wire. Failure to install within 5 degrees of alignment with the guy load will significantly lower the strength. Proper alignment is crucial for maintaining the anchor's holding capacity, which depends on the bond stress between the rock and the grout.
What certifications and manufacturing standards do your anchors meet?
Our grouted rock anchors are hot-dip galvanized per ASTM A-153, feature a forged knob for enhanced interference fit with grout, and meet industry standards for durability and performance in critical infrastructure applications like utility grids.
Can you accommodate large orders with customization and distribution needs?
Yes, we offer grouted rock anchors in customizable lengths according to specific project requirements for large-scale applications. We provide various packing options including plywood pallet, steel pallet, and carton & plywood pallet/crate for safe and efficient distribution.
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