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پرونده های شرکت در مورد Self Drilling Hollow Grouting Anchors for Cobblestone Tunnel Support

Self Drilling Hollow Grouting Anchors for Cobblestone Tunnel Support

2026-10-22

Tunneling through cobblestone and loose ground has long been a tough challenge for geotechnical contractors. Traditional anchors struggle in unstable, collapsing formations. Self-drilling hollow grouting bars offer a practical, all-in-one anchoring solution that works well not only in intact stable rock but also in loose gravel and cobblestone layers.

The hollow bar acts as a drill rod and built-in grout pipe. Resin cartridges, structural grout or rapid-hardening cement can be pumped through its central bore. Its hollow threaded design delivers superior rigidity and shear performance versus solid anchor rods. The external large-pitch thread increases bonding contact with grout, raising overall anchoring capacity. Threaded segments can be easily cut and coupled on-site to match project depth requirements.

Core Advantages

Fast installation, allows timely prestress application
Active tensioning, up to 50KN prestress with controlled over-tension
Single-worker tensioning with standard site tools
High-pressure grouting via the hollow core to consolidate surrounding loose ground
Full production-to-installation quality traceability

Assembly

This anchor system consists of expansion shell anchor head, hollow grouting bar, grout stop, bearing plate and lock nut.

On-Site Quality Specifications

Borehole diameter follows design drawings
Hole depth must exceed anchor length
Hole spacing tolerance: ±150mm
Minimum insertion depth: 95% of designed length
Anchor plate sits flush against rock/soil surface; bars stay straight, free from cracks, oil and rust flaking

Standard pre-job briefings and training are mandatory for crews. Engineers must mark anchor layout points precisely. Site supervisors monitor mortar water-cement ratio, grout pressure and injected volume to guarantee stable ground reinforcement.

Sofia1206818363

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تماس سریع

آدرس

ساختمان 4F، 6#، شماره 19 جاده هونان، شهر لیاوچنگ، استان شاندونگ، چین

تلفن

86-0635-8278268

ایمیل

sofia-ge@drillbuttonbit.com

Sofia1206818363

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سیاست حفظ حریم خصوصی | نقشه سایت | چین کیفیت خوب بیت دکمه عرضه کننده. حقوق چاپ 2026 Yanggu Henglong Construction Machinery Co., Ltd. تمام حقوق محفوظ است

بیت دکمه

چوب حفاری

آداپتورهای ساق پا

آستین کوپلینگ

لقمه اسکنه

کراس بيت

فولادهای مته یکپارچه

مته گشادکن

قطعات حفاری TMT

کج شکسته

سنگ ذغال سنگ

جک چکش دستی

"روک بولت"

ابزار چکش DTH

لوله حفاری سنگ

محافظ سوراخ

امکانات سخت افزاری