40Cr Self-drilling Hollow Grouting Anchor Bolt/Bar/Rod

40Cr Self-drilling Hollow Grouting Anchor Bolt/Bar/Rod

Name: Hollow Anchor Rod
Uploaded: 2024-07-01T06:24:02+08:00
Description: Hollow Anchor Rod

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Payment Type:	L/C,D/P,T/T
Incoterm:	CIF,CFR,FOB,EXW
Transportation:	Ocean,Land,Express
Port:	Tianjin,Qingdao,Shanghai

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Product Description

Product Attributes

Model No.: 40Cr

Standard: Bs, Gb, Astm, Jis, Din

Material: A53-A369, Q195-Q345, 10#-45#, 16mn, St35-St52, Cr-Mo Alloy

Section Shape: Round

Place Of Origin: China

Application: Fluid Pipe, Structure Pipe, Drill Pipe

Production Process: Cold Drawn

Certification: Ce

Whether Alloy: Non-Alloy

Tolerance: ±1%

Category: Seamless Steel Pipe

Processing Service: Bending, Welding, Decoiling, Punching, Cutting

Packaging & Delivery

Selling Units	:	Ton
Package Type	:	Standard marine packaging, or as required by the customer
Picture Example	:

Hollow Anchor Rod

Full Threaded Steel Self Drilling Anchor Bolt

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Product Description

Hollow anchor bar means a rod that transfers the structures or geotechnical load to a stable rock formations, anchor bolt consists of bar, drill bit, coupling, plate, grouting stopper and nut. Widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It’s irreplaceable in narrow construction environment. Hollow anchor bar is made of seamless tube with high strength.

Hollow Anchor Bar

Application scope:

1. Radial reinforcement: Hollow anchors replace traditional mortar anchors for radial reinforcement, which can completely solve many defects such as incomplete grouting and inability to achieve pressure grouting during the construction process of traditional mortar anchors, ensuring the quality of the project.

2. Slope reinforcement: Using hollow anchors to reinforce unstable slopes not only has a simple process and low cost, but also is convenient and quick to construct and has remarkable effects.

3. Foundation pit support: Hollow anchors are used to reinforce foundation pits of buildings, which not only has a simple process, but also can realize pressure grouting and improve the surrounding rock conditions of foundation pits.

Structure:

The hollow anchor consists of a hollow fully threaded rod body, anchor head, grout stopper, backing plate, nut, etc. Each part of it is designed to maximize the cost of filling and dense filling during grouting. The mortar can be up to dozens of times. Kilograms (specific parameters are subject to design) penetrate into surrounding rock cracks under pressure, and backing plates and nuts can be easily installed.

Features:

The hollow anchor combines the functions of the anchor and the grouting pipe into one. It is a grouting pipe during grouting, and it becomes an Anchor Rod without pulling it out after grouting. Compared with traditional anchoring technology.

1. The hollow design allows the anchor to function as a grouting pipe, avoiding the loss of mortar caused by pulling out the grouting pipe in traditional construction techniques.

2. The grouting is full and pressure grouting can be realized, which improves the quality of the project.

3. Due to the role of various accessories, the centering of the rod body is very good, and the mortar can wrap the entire length of the anchor rod, avoiding the risk of corrosion and achieving the purpose of long-term support.

4. Easy to install. Backing plates and nuts can be easily installed without on-site processing of threads.

5. Combined with the supporting special grouting pump and grouting technology for anchor rods, it is currently the only anchor system in China that has completely solved many problems of traditional solid support.

Self Drilling Anchor Bolt

Product Specification

R-Thread Anchor Rod Technial Data

	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Outside diameter (mm)	25	32	32	38	51	51	76	76
Internal diameter (mm)	14	19	16	19	36	33	52	45
Ultimate load capacity (KN)	200	280	360	500	550	800	1600	1900
Yield load capacity (KN)	150	230	280	400	450	630	1200	1500
Tensile strength, Rp0.2 (N/mm2)	800	800	800	800	800	800	800	800
Yield strength, Rp0.2 (N/mm2)	650	650	650	650	650	650	650	650
Weight (Kg/m)	2.3	3.2	3.6	5.5	6.5	8.0	16.0	19.7
Thread type (left-hand)	ISO 10208				ISO 1720		MAI T76 Standard
Steel grade	En10083-1 (Alloy structure steel)
Steel grade	Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical.

R thread anchor bar or called rock rod, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.

Thread size: R25, R32, R38, R51, T76.

Thread standard: ISO10208, ISO1720 etc.

T-Thread Anchor Rod Technial Data

Bar Type	Outside Diameter (mm)	Inside Diameter (mm)	Cross section (mm2)	Ultimate Load KN	Yield Point KN	Weight (kg/m)	Thread Left/ Right Hand
T30/11	30	11	446	320	260	3.3	Lift or right
T30/14	30	14	395	260	220	2.9	Lift or right
T30/16	30	16	382	220	180	2.7	Lift or right
T40/16	40	16	879	660	525	7.0	Lift or right
T40/20	40	20	726	539	430	5.6	Lift or right
T52/26	52	26	1337	929	730	10.0	Lift or right
T73/53	73	53	1160	1630	970	12.3	Lift or right
T73/56	73	56	1094	1414	785	11.1	Lift or right
T73/45	73	45	2265	1630	1180	17.8	Lift or right

T thread anchor bar surface with a trapezoidal thread, this design of connection is much stronger and reliable when compared with rope thread, we supply full sizes from T30 to T103.

Thread size: T30, T40, T52, T73, T103, T127, T130.

Thread standard: ISO10208, ISO1720 etc.

Product Display

We can produce different sizes, thicknesses, widths and materials according to your requirements

Hollow Anchor Bar

Quality first: production and inspection in strict accordance with production standards;

Price advantage: discounts based on real market prices;

Transaction security: There will be no loss of customer funds;

After-sales guarantee: the customer's problem is our problem;

Long-term cooperation: quality assurance, price advantage, sincere service can last for a long time.

Technology Process

The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc projects.

1. Connect the alloy drill and anchor rod one end, on the other end, connect the drill sleeve and shank adapter, then connect the drilling rig or hand-held drill. Then start drilling, fill the cooling water while drilling.( If you want to lengthen the anchor rod, can connect the coupling, and then drilling)

2. Take down the drill, put the stop-grouting plug into the rod, and insert it to the hole, then ready to grout. Special circumstances like surrounding rock grouting tension is over or surrounding rock is too broken, can use anchor agent to seal the hole.

3. Connect quick grouting coupling and anchor rod end, connect other end of grouting machine.

4. Start grouting, when grouting full and reach design value then power off. Grouting pressure according to the design parameters and grouting machine performance determine, Cement/sand reference values is 1:0 ~ 1:1, water/cement reference value is 0.45:1 ~ 0.5:1.

5. Install anchor plate and nuts, and tighten nuts.