Expansion Shell

Fine-rolled rebar is a special type of threaded steel bar, which is often used in construction, bridges and other projects to provide high-strength anchoring force. Expansion fittings are components used in conjunction with fine-rolled rebar. These fittings usually have an expansion function. During the installation process, they are expanded in a specific way so that they can be closely integrated with the surrounding structure, playing the role of fixing, connecting or enhancing the anchoring effect, ensuring that the fine-rolled rebar can stably perform its load-bearing and connection functions.

Expansion shell rock bolt anchors come in a wide variety of styles but the basic principle of operation is the same in all of these anchors. The components of a typical expansion shell anchor are a tapered cone with an internal thread and a pair of wedges held in place by a bail. The cone is screwed onto the threaded end of the bolt and the entire assembly is inserted into the hole that has been drilled to receive the rockbolt.

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ADVANTAGES

Expansion shell is an important part of expansion shell anchor bolt. expansion shell can provide prestressing to rock. It is very convenient and easy to install. It is suited temporary support and permanent support. It matches with domed plate, nut and domed washer. And they are suited for use in single or twin grout tube installation due to the minimal rotation the bar undergoes the setting process.

Expansion shells are used together with rock securing bolts, mounting bolts and combination bolts. It provides excellent grounding in hard and medium hard rock masses.

USE

They are widely used in jet grouting, water well-drilling, tunnel, slope pre-support and control, mining, coast, building foundation, soil nailing, micropile, road reinforcement, water conservancy projects, geological faulty treatment, deep excavation,railway system, metro projects, etc.

SPECIFICATIONS

Specifications：

1. size:32mm, 35mm, 38mm, 42mm, 48mm

2. process:casting, forged, stamping, welding ,assembling

3. type: three leaves

4. expansion shell include expansion shell anchor bolt, anchor plate and so on.

PACKAGE

We support customized packaging ways.