Characteristics of back bolt type without keel dry anchoring system

The use of rain curtain principle: “multi-cavity decompression, isobaric waterproof, decompression and elimination.” With ventilation function, insulation, sound insulation, energy saving and environmental protection. According to the experts pointed out: horizontal seam open – 5.1% into the ventilation chamber, only 0.3% of the rain reaches the insulation layer; all slit open – 16.6% into the ventilation chamber, only 0.4% of the rain reaches the insulation layer; system drying time – There is light 24 hours dry.

L-type plug using the principle of planting bars and wall connection, but also to the insulation layer to play a reinforcement role.

Back bolt type anchor special self-test function, at the same time can be applied in the thin decorative panels, but also reduce the load on the wall.

To avoid the traditional keel frame shape, greatly reducing the cost, while the construction speed for the traditional 2 to 3 times.

System structure is simple, decorative panel removable replacement, low maintenance costs.

Application of back – bolt type without keel plate dry – hanging anchoring system

Back bolt type without keel Porcelain plate dry anchoring system applied chemical bonding (planting bar) principle and back bolt principle, developed a new technology without keel. The use of back bolt type of anchor, the development of the anchor, embedded in the decorative panels, the screw into the bottom of the expansion, and the unique drill in the back of the decorative panel of the extension of the hole to form a stress-free fastening mode.

The use of expansion bolts in conventional processes can only be used in the compression zone of concrete and can not be used in the cracking zone. It is difficult to determine whether the facade of a building surface is a compression zone or a cracked area. It is limited in construction and is generally not suitable for permanent construction. The use of expansion bolts if not long stainless steel may be corroded, resulting in expansion bolts loose, or even fall off. Friction type expansion bolt safety is poor, in the repeated winds easily loose. There are also embedded parts in concrete. The shortcomings of embedded parts is trouble, requiring the design position of the deviation within ± 10mm, so there is a certain degree of difficulty. The anchorage is the use of structural adhesive to bond steel and concrete, the use of colloid adhesion to form surface-surface contact with the full length of the anchor, the substrate without extrusion pressure, can be used in the concrete crack area. Chemical anchors are composed of chemical agents (resin anchors) and metal rods. Pull strength, anti-vibration, anti-fatigue, no shrinkage, anti-aging, fast carrying, easy installation, low cost, and concrete wall is commonly used in connection with the base.

Anchorage for PC strand anchor

The characteristics of YJM anchors are as the following:

  1. Wide application: it is adaptable for stand with diameters of Φ’8, Φ’9, Φ’11, Φ’12.7, Φ’15.2 and Φ’18 with various strength from 1570Mpa to 2000Mpa as well as for high tensile steel wires with diameters of Φ’5, Φ’7 with the standard strength from 1570Mpa to 1860Mpa.
  2. YJM anchoring system is available for full range of tendon sizes (1-55 strands). In addition, our company can produce anchorages of any type of arbitrary holes in accordance with demands of customers.
  3. Good in terms of self-anchoring and easy operation;
  4. High anchoring efficiency factor, stable and reliable;
  5. Be capable of repetitive stretching and strong in terms of anti-interference capability.

(This article comes from edit released)

Application of Anchoring System in External Insulation of Exterior Wall

At present, in various parts of the promotion and application of a variety of exterior insulation system technology and products in the process of building walls more or less hollowing, cracks or shedding, etc., not only affect the energy efficiency of buildings, but also directly affect To the community’s recognition and application of this technology. Therefore, the external wall insulation reliability and safety issues must be brought to our attention, need to take effective measures to solve.

In order to ensure the external insulation system reliability and security, in the use of adhesive fixed basis, and then through the mechanical anchor reinforcement is necessary. As early as July 1, 2003 implementation of the “expansion of polystyrene board thin plaster external insulation system,” the national standard, the external wall insulation system used in the development of anchors have strict performance requirements, from which it is easy to see the role of anchors.

As we all know, the external wall insulation is a system, it is not by a single category of products. Currently there are two commonly used systems, one kind of bolt with the entire system, the other is connected with the bracket insulation system. Select insulation anchors to be involved in the substrate, the thickness of insulation, insulation materials, as well as system applications. The anchor bolt into the substrate after the main friction, convex combination (mechanical locking), chemical bonding three forces to bear the load. Domestic use is the most after the two. In the European countries, the application of anchors for many years, there are strict standards, such as the use of the substrate, how to plaster layer or finishes in the existing surface insulation layer are provided. China draws on foreign standards, in the relevant provisions of the provisions of more than a certain height of the building through the anchor bolts to connect to the foundation of the above part of the insulation surface must also be used insulation anchor.

On the installation of insulation anchor, there are two main ways. One is a percussive installation, convenient and quick, do not need additional installation tools. The other is screw-in installation, the need to use special installation tools and the appropriate installation techniques. But screw-in mounting can provide higher bearing capacity and safety. In the installation process, will be screwed into the disc inside the insulation cap position (insulation cap and the disc is flat), can be a good way to avoid heat loss. In addition, we have to consider the thickness of the insulation board, but also consider the plaster layer thickness. Because it involves some of the actual installation, installation of anchors must pay attention to playing the hole, the hole must be longer than the length of the insulation anchor. It is worth noting that the installation of the nail and the disc to install separately, first knock down the disc, then nail into. Currently on the market there are already in the design of the screw to play with the role of the safety foot to prevent disc cracking products, nails and discs are nailed together.

From the perspective of the structure of the building, the composite wall insulation system along the wall thickness direction is composed of a variety of different materials, and these have different thermal conductivity of the materials were in different temperature fields, thermal expansion and contraction degree and direction Are not the same, the resulting stress load is very complex. In addition, these materials in different wind and negative pressure field, the force size and direction will change due to changes in the outside world. Therefore, the composite wall insulation system load characteristics of non-linear, three-dimensional, time-varying, if not take feasible measures, problems will inevitably arise. Therefore, the implementation of insulation measures on the building, the increase in the anchor is an essential process, the only way to ensure the system safe and reliable.


Scotrenewables Tidal Power has completed the deployment of its advanced modular anchoring system at the European Marine Energy Centre, Orkney in preparation for the installation of its SR2000 2MW floating tidal turbine.

The anchor deployment formed part of a novel tidal anchors project for floating technologies, which was carried out in partnership with McLaughlin & Harvey, SeaRoc and Scotmarine. The aim of the project was to develop an innovative low cost anchoring system for floating tidal energy converters which could be readily installed and decommissioned utilising low cost vessels and to demonstrate the anchors on the Scotrenewables SR2000 2MW turbine installation, the largest floating tidal turbine in the world.

The project was supported by the Scottish Government’s Marine Renewables Commercialisation Fund, which was established to support the development of enabling technology for marine energy arrays and by Invest NI.

Scotrenewables’ aim is to reduce the levelised cost of energy for tidal energy generation by engineering out expensive, highly specialised vessels in preference for lower cost workboat style vessels for all major aspects of installation, maintenance and decommissioning of its floating tidal turbine and anchors. The engineering challenge has been to maintain this design approach as the company’s technology and its anchoring requirements have increased in scale.

To achieve this, Scotrenewables, in collaboration with our partners McLaughlin & Harvey and Scotmarine developed a novel installation methodology where locally cast, modular interlocking anchor blocks, could be transported to the quayside and placed on the sea-bed where they would be picked up for deployment on site using specially designed, remotely operated lifting equipment mounted on readily available work boats. Manufactured by McLaughlin & Harvey, the pre-cast fibre reinforced concrete anchor modules were placed on the sea-bed adjacent to the quayside at Hatston using local heavy lifting engineers Heddle Construction. From there, the anchor modules (each in excess of 64 tonnes) were transported to the EMEC tidal test site at the Fall of Warness, off Eday, some 30km away by Scotmarine’s MV Orcadia II workboat with the use of the bespoke deployment frame.

The system, approach, installation and decommissioning procedures were developed from initial concept through to full-scale demonstration and deployment over the course of the two-year project, with the last module being installed last week.

Final tests will come when the SR2000 is connected onsite in the coming months.

Andrew Scott, Scotrenewables CEO said:

“The floating tidal anchors project has demonstrated how inexpensive gravity anchor materials can be utilised in conjunction with a highly innovative deployment approach towards a low cost anchoring solution for floating tidal installations. The entire anchoring system was fabricated within Orkney and installed using a locally based workboat vessel, further illustrating how this approach can make full use of the local supply chain for tidal energy installations.”

(This article comes from EMEC editor released)