Pre-buried channel (AH anti-skid anti-slip groove)

Pre-buried tank product introduction

The pre-embedded channel technology was first applied in many fields such as concrete anchoring system and curtain wall supporting system in the developed countries in the 1920s. Later, it has gradually developed into other fields. It has been used for nearly 100 years and is in good condition. With the development of China's national economy and the construction of urbanization, the rapid development of urban rail transit construction, coupled with the construction of urban underground integrated pipe network tunnels, more and more functional facilities installed in the interval tunnels. The addition of fire evacuation platforms, civil communication facilities and existing contact networks, communications and signals, fire water supply and drainage pipeline installations have become an important part of rail transit system engineering, and have become an important link affecting the construction period and project quality. In the past, manual drilling installation, chemical anchor bolts or post-expansion anchor bolts were usually used to fix the equipment brackets. The environmental pollution problems such as low work efficiency, large dust and noise were serious. If the drilling position is not properly selected, the structure of the tube will be damaged, causing operational hazards.

In recent years, the company has organized technical strength to research and develop the anti-vibration anti-skid pre-embedded parts of subway, rail transit and underground integrated pipe network tunnels, and combines advanced foreign technology and concept to produce a series of concrete embedded parts, including embedded. Channel series, pre-embedded screw sleeve external channel series and deck external channel series. The products have been tested by the national authoritative testing institutions, and the technical performance indicators have reached or exceeded those of similar foreign products. Such as anti-fatigue load test, tensile strength, tensile shear performance are better than similar foreign products. The introduction of domestically produced concrete embedded parts has broken the situation of relying entirely on imports. The development and application of this product has greatly reduced the difficulty of construction and installation in subway tunnels, solved environmental pollution problems such as noise and dust, protected the original structure of prefabricated components such as tunnel segments, and improved the quality of the entire project and shortened. The construction period. Compared with similar foreign products, not only the quality is reliable, but also the cost is greatly reduced, and the project investment cost is reduced. This product series is also widely used in bridges, buildings, major public facilities, factories and mines, etc., with broad application prospects.

1. AH anti-shock anti-slip groove pre-buried channel series

1. Features: AH series pre-buried channel installation and adjustment is convenient ★ Save installation time and speed up construction progress; ★ Energy-saving construction costs.
AH series pre-buried channels are available in various forms and materials ★ The toothed channel is matched with the toothed T-bolt for reliable fixing performance; ★ Carbon steel and stainless steel materials meet the needs.
Safe and reliable ★ The concrete structure has a longer service life without damaging the concrete structure; ★ Can be installed in concrete tensile and compression areas; ★ Certified, can be used for refractory structural components; ★ Carbon steel is highly resistant to corrosion on the surface; ★ Can withstand dynamic loads and seismic loads; ★ It is used for various building load installations; ★ Safe to install, no noise, no vibration, no pollution.
Fast and economical ★ Adjustable anchor points; ★ Use bolt connection, no need to weld; ★ Installation tools are simple and cost-effective; ★ Adopt prefabricated design components to reduce construction time; ★ A wide range of options is available for a variety of different requirements.

2. Model marking method for channels and anchors

The model number of the embedded channel is expressed in the following form depending on its material and cross section.

3. Structure of AH pre-buried channel

★ The AH pre-buried channel consists of channel steel with internal teeth and anchor bolts anchored on the back of the channel. It is pre-buried in concrete and the required equipment is fixed by T-bolts.

★ The channel with internal tooth shape is matched with the toothed T-bolt for fastening various metal brackets or components, which is excellent in shock resistance, anti-skid and fixing performance.

★The carbon steel channel is made of Q345B material or customer-specified material, which is hot-rolled into special C-shaped channel steel. The inner and outer surfaces are hot-dip galvanized and shot blasted to form a uniform roughness on the surface of the galvanized layer. The epoxy resin is electrostatically coated with hot-melt treatment, and the surface water-repellent alkali-resistant layer finally forms a high-strength, corrosion-resistant, alkali-resistant surface layer on the surface.

★Stainless steel channel is made of 316L and 316 (material according to user's requirements) and hot rolled into special C-shaped channel steel, and the surface is shot blasted.

★ The end of the channel is sealed by a plastic head. The inside of the channel is filled with elastic and environmentally-friendly filling strips. The surface of the groove is sealed with high-viscosity elastic tape to prevent the concrete slurry from leaking into the channel.

★ The lower layer of elastic tape is a high-viscosity cloth-based material, and the upper layer is elastic tape, which has high bonding strength.

4. Comprehensive technical performance of AHC pre-buried channel series

The AHC pre-buried channel products are tested by the National Construction Engineering Quality Supervision and Inspection Center. The results are shown in the following table.

AHC pre-buried channel technical performance indicators test results table

The position distribution of common bolts on the channel:

25(35) 200(250) 200(250) n×200(250) 200(250) 200(250) 25(35)

■Bolt spacing ≤250mm ■h is the end spacing ■H is the bolt spacing ■n is the number of bolts

7. T-bolt

The AH T-bolt has an S-shaped T-head that prevents bolt rotation and ensures ease of assembly and reliability.

	Name	T-type bolt
	power level	8.8, 10.9
	Applicable channel	AHC52/34		AHC 40/22 AHC 38/23			AHC 30/20 AHC 30/26
	Bolt specification	M16	M20	M10	M12	M16	M12	M10
	Bolt length	50-200	50-200	40-100		50-200	40-100
	Bolt material	1 low alloy steel hot dip galvanizing treatment, 2 stainless steel passivation treatment
	Surface treatment	Hot dip zinc, Dacromet, zinc-aluminum alloy