Sewn into the ground to prevent collapse
Rock bolt
Rock Bolt for NATM Method
Rock bolts used in the NATM method. Rock bolts can be selected according to the design and ground conditions.
Product Description
商品説明
Overview
Rock bolts used in the NATM method allow selection of rock bolts according to design and geotechnical conditions.
Types of Rock Bolts
UN bolts (180 kN proof twist)”, ‘deformed bar steel rock bolts’, ‘high proof rock bolts (297 kN proof)’, and ‘UND self-drilling rock bolts’ are lined up according to the geological conditions and applications. We also offer an assortment of accessory materials and propose the optimal installation method.
UN Rock Bolt (180kN proof stress twist)
High-strength locking bolt made of high-tensile deformed steel bar with torsion processing.
Deformed Steel Bar Rock Bolts
Rock bolt using high tensile deformed steel bar SD345 or SD390.
High Strength Rock Bolt (297 kN bearing capacity)
High bearing capacity rock bolt applicable to cases where soil pressure is high, such as expansive ground or large soil cover.
UN Mortar (Premix mortar for rock bolt anchorage)
UN Mortar has excellent adhesion and quick-strength required for rock bolt anchorage, and provides sufficient initial strength with no sagging after injection.
Stable mortar can be supplied continuously by using MY PUMP M400J.
Accessories for Rock Bolts
In addition to the standard standard, we also have a variety of special standards such as hemispherical face washers.
UND Self-drilling Rock Bolt
◆Suitable for ground with non-self-supporting borehole walls. (Gravel mixed with sediment, hardened rock, etc.)
◆The drilling rod is used as it is as a rock bolt, so there is no need to retrieve the rod and it is easy to work with.
◆The drilling rod is hollow, so it can be filled afterwards and the entire length of the bolt can be grouted securely.
◆Various fixing materials such as cement and urethane can be injected.