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Sinorock hollow bar system always committed to supply low cost& high efficiency

Le 21 janvier 2017, 10:43 dans Humeurs 0

With the development of economy, the coal as main energy demand is becoming more and more huge, coal as the main production in the coal industry is also facing the deep development of the problem, with the increase of excavation depth, roadway supporting faces many difficulties, in order to improve the support strength, enhance security, we need to analyze the application of self drilling hollow bar support in coal mine internal. 

Self drilling hollow bar is a direct acting within the surrounding rock of roadway,it is different from the old ways such as wood beams , in other words, it is from the past passive support on the outside of the rock into the internal active support, so that we can reduce the deformation of roadway, improving the bearing capacity of self drilling hollow bar support. 

Sinorock hollow bar system always committed to supply low cost, high efficiency, energy saving and environment-friendly products for global customers. We are confident for new challenges of future development and we are keeping improve our quality and service as well as management for better serving our customers and payback to the society. 

The method of Sinorock stabilizes unstable slope surface using the combination of hollow bars and wire ropes. 

By tightening wire ropes, it is possible to hold back the loosened slope ground so that small scale surface sliding will be prevented.

Sinorock hollow bar system usually play the role of micro-piles

Le 17 septembre 2016, 11:52 dans Humeurs 0

When it comes to the application of Sinorock hollow bar system in bridge construction, it is usually play the role of micro-piles. Suitable for narrow working facilities, Sinorock hollow bar system can guarantee the normal operation and safety within the pit. Sinorock hollow bar system is small construction equipment, which can effectively prevent the deformation of foundation pit and the movement of the pit soil outside.

Sinorock Self Drilling hollow bar provides an effective permanent anchor that can be readily installed into loose or collapsing ground without the need for a casing. Rotary percussive drilling, combined with simultaneous grouting, ensures that the grout penetrates the surrounding ground to provide an increased level of bond. 

All Sinorock Self Drilling hollow bars should incorporate a fixed length (bonded in the stable zone) and a free length (debonded with a sleeve, in the wedge zone) to enable the anchor to be prestressed. The prestress provides an active restraint, enabling the anchor to resist service loadings without additional elongation. 

Sinorock Self Drilling hollow bar Systems (irrespective of threadform) are very suitable as permanent anchors. The ground anchor length is flexible, it can be lengthened. It adapts to several projects, such as railway, tunnel, hydro-junction, slope, dam, bridge base, high-rise building, construction reinforcement and so on. 

Grouting parameters and working principle of hollow bar anchor

Le 10 août 2016, 11:49 dans Humeurs 0

Hollow bar anchor can carry out drilling, grouting and anchoring integrally and will well improve surrounding rocks in various types of slope treatments so as to gain expected support results and solve hole forming difficulty problems in anchoring.

With increasing traffic, energy and other infrastructure constructions, anchoring technology has developed rapidly, which can give full play rock self-stability in tunnels, basements and slope. It shows broad prospects with the use level of hollow bar anchor. 

Given all that, the grouting parameters of hollow anchor bar are as follows:

⑴ Hollow anchor bar system

Grouting material: cement slurry

Water cement ratio: 0.4 ~ 0.5

Grouting pressure: 0.2 ~ 0.5Mpa

⑵ Expansion hollow anchor bar system

Grouting material: grout

Water cement ratio: 0.4 ~ 0.5

Grouting pressure: 0.35 ~ 0.45Mpa

The amount of 4.0m hollow anchor bar used crack repair is 240 and 10.0m expansion hollow anchor bar is 160. From the actually monitoring data, we can find hollow anchor bar has a obvious grouting reinforcement and achieves the desired effect. 

Hollow anchor bar which compared to previous anchor construction,improve the bolt grouting construction technology, effectively solved the problem which the anchor grouting is not full,after years of use, and it has been widely used in tunnel construction.

Here introduce the working principle of hollow anchor bar:

Mortar through a small section of the hollow anchor bar body from the connection on the set of pulp slurry mouth, bolt used in arch department, mortar filling anchor hole from bottom to top, anchor hole air vent, from the depth of the anchor hole at the top of the exhaust pipe and mortar grouting process, the inherent nature of air, to ensure the mortar and close-grained.

With our long history of manufacturing and constantly challenging ourselves to improve,Sinorock have become the one of professional hollow anchor bolt manufacturers in China. We are proudly manufacture using domestic steel and support other manufacturers when ever possible.

 

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