Main function of self drilling rock bolt in concrete structure
The main function of self drilling rock bolt in concrete structure is bear tensile force to cover poor performance of tensile strength and shortage of ductility.
Structurally, self drilling rock bolt is divided into anchorage section in rock body, free section between rock body and free section in concrete. Intense water pressure between concrete and rock body may be transferred directly into acting force between self drilling rock bolt and concrete.
With the load increase on self drilling rock anchor, the maximum displacement of bond stress between self drilling rock bolt and slurry body moves down to the fixed segment, slides in gradual way and distributes in the way of changing bond stress. Initially, adhesive force has effect near anchoring segment. When adhesive force is overcome, slide will be produced and most bond stresses will be transmitted to the far side of anchoring segment, then friction force at near side has little effect.
Basing on the demands of slope engineering, geological condition, slope feature, scale, shape, deformation degree and construction condition, pre-stressed rock bolt or coalition of non-prestressed anchor bolt, support pile, retaining wall and sprayed concrete can be adopted to sustain slope stable.
Under condition of the same safety factor for slope stability, pre-streesed rock bolt is safer to provide supporting and resisting power, which can be used for slope reinforcement, slope earth- retaining, anchoring retaining wall, landslide prevention, etc.
Sinorock-the top grade anchor bolt manufacturer for construction
Sinorock ’s self drilling bolt is a sort of hollow bar that makes grouting and anchoring can be done simultaneously,it can also provide an excellent effect on various kinds of complex conditions,such as soft soils,loose rock,fractured zones and so on.
The Sinorock Self drilling bolt system is designed for use in various applications, including tunnel repair and refurbishment and also slope and cliff face reinforcement. It provides the optimal solution for nailing, bolting, micro piling and as ground anchors for use in difficult ground and rock conditions. The system comprises of high quality fittings matched to rope threaded seamless steel tube which is threaded to ISO 2008.The self drilling anchor bolt system enables drilling and grouting of the anchor in one operation, making a saving in on-site and project time.
Any civil engineering company worth working with should offer a variety of certified, quality products for use in foundation stabilization, repair, or any other commercial project at hand. The company should also be willing to work with you and the needs of your site and budget to acquire the necessary products through their partnership with product suppliers.Sinorock is the professional self drilling bolt supplier for the civil construction.
At present, self drilling anchor has good supporting effect in good geological conditions, while in soft and complex conditions, such ascrushing, high ground stress in tunnels with large deformation, the challenge of self drilling anchor support is quite difficult.
We specialise in the making of a variety of anchor bolt products and we are known to be the number one anchor bolt manufacturer in China.Sinorock is the top grade anchor bolt manufacturer, meeting clients’ exacting demands for critical applications in hostile environments.
R thread and T thread self drilling bolts from Sinorock is useful for civil constuction
The self drilling anchor supporting structure must have a good ductility,in other words,no doubt the destruction is inevitable occurs
if the self drilling anchor supporting system that has no the pressure and yield properties.
Self drilling anchor supply may sound like the least of your worries as a contractor or
construction supplier, but if you pass on quality
Self drilling anchors to stay under budget your whole project will be irreversibly
compromised. If you don’t know what to look and ask for you could easily end up with shoddy materials that will lessen the longevity of your project.
Self drilling anchors are widely used in Tunnels and underground excavations.Sinorock'self drilling anchor systems are built from top quality
materials guaranteeing high strength and durability to stand up to the toughest
environments.Sinorock'self drilling anchor systems are the unsung
heroes of most fall protection systems,often overlooked but critical components because they securely attach your system to the anchorage.
Sinorock is the leading and most innovative company in the self drilling bolts industry. Our broad range of R thread and T thread self drilling bolts includes unusually long lengths and large diameters. Our quality products and superior customer service have made Sinorock the supplier of choice to some of the most notable construction projects in the world.
Sinorock strives to meet your specific anchor bolt needs so you can compete in the anchoring industry. We offer a wide range of services that add value to your company. The company has modernised its plant with capability to produce its range of anchor bolts in any quantity to
meet the demand in the Domestic and in the International Market.
The SGS report of tensile test for self drilling hollow anchor bar of Sinorock
The following is a copy of SGS report which tells the result of tensile test for self drilling hollow anchor bar.
tensile test result of Sinorock self-drilling anchor hollow bar
The results fully achieve the client’s requirements:
- The test of anchor bars is performed full size.
- The minimum tensile strength is 237 MPa above the minimum yield strength. It is better than the specified 25 000 psi (172 MPa) at least by F432.
- Strength and ductility performance are up to the standards simultaneously.
In fact, Sinorock has a range of standard self-drilling anchor rods. These rods are special treated to gain high resistance capacity. That means:
- For a same cross section of steel, the load bearing capability of Sinorock anchor rods is up to 40% higher, allowing for a larger nailing grid or a smaller size (diameter) of bar rods. Project cost saving.
- For a same tensile strength, our rods are lighter. Labor cost saving.
In the end of tensile test, if the strain increased even more, eventually the object will neck. During elastic and plastic deformation the entire object’s cross-sectional area decreases slightly, but at the onset of necking the weakest part of the material suddenly becomes noticeably thinner. It takes less force to finish pulling the steel pipe apart.
Furthermore, you may notice the Ductility Agt parameter in the SGS report.
Sinorock has over five years of rich experience in manufacturing self drilling anchor bolts
It is our constant endeavour to upgrade our expertise and provide state of the art
infrastructure to clients. Sinorock has earned a reputation for its engineering and
construction excellence by providing minnovative and cost-effective solutions - self
drilling anchor bolts to critical projects. Backed by years of excellent construction
activity with a large fleet of modern construction equipment and motivated pool of manpower with proven procedures and work systems and unique databases, Sinorock is committed to provide quality construction solutions to its clients. It has been an exciting journey with several challenges, new milestones reached, many more peaks to conquer.
Sinorock has over five years of rich experience in executing worldwide projects across
diverse fields.
Sinorock SDA bolts are frequently used in structural repair and lateral restraint applications
Sinorock - We are proud to announce that we recently have been certified to the most recent ISO 9001:2008 Quality Management standard. We are physically and financially capable of handling even the largest of projects. From start to finish, Sinorock and our industry specialists can handle your projects needs.We do business the way it’s suppose to be done.
With the philosophy of continuous improvement and customer satisfaction,Sinorock has grown from a small anchor bolt manufacturer to become a reputable global player today. As we pursue our commitment for service excellence, we begin to expand our services from sales to assisting our customer resolve on-site problems. We believe that our success lies in prompt response and strong technical support, both highly critical attributes to our customers.
As a manufacturer of self drilling anchor system to major projects around the world,
Sinorock has proven its quality and reliability to its clients. The company enjoys serving the sector and works hard to constantly improve and develop its services.
The company provides services in the design and production of self drilling anchor system for mining,tunneling,hydroelectric&civil construction.
Sinorock is very experienced in the implementation of self drilling anchor bolts. These are frequently used in structural repair and lateral restraint applications where a fixing has to be made into weak substrates such as those filled with rubble.
Sinorock has successfully undertaken many such projects and can provide anchors of varied lengths and sizes to suit the specific requirements of the project.
Sinorock has been offering the anchor bolt concept as a unique, safe and reliable system of rock support.
Ongoing development of faster, safer and more exotic tunnelling techniques places a constant pressure on manufacturers to provide more efficient rock support solutions which will help the shortening of cycle time. As ground conditions get more and more demanding, emphasis is placed on flexible and intelligent support systems in which rock and soil reinforcement is expected to contribute to the productivity and safety of the operation. The trend has been
to provide rock support and reinforcement systems that are easy to install, assure
efficiency and provide safety. For the last 10 years,Sinorock has been offering the anchor bolt concept as a unique, safe and reliable system of rock support.
Sinorock's anchor bolt systems are the perfect solution for the most challenging projects
The range of Sinorock's rock bolt systems features various grades of high quality.With a
production range of Tthread to R thread, we will design the perfect engineering solution for your project.
To avoid occurrence of engineering accident, extend life of anchor bolts’ structure and
enhance projects’ reliability and security, we should not only adopt high-quality anchor
bolt products, but also develop the technology of rock bolt.
Years of experience have provided Sinorock with a wealth of information concerning anchoring types, applications, and systems. Technical advice is available at all times for the development of better ideas for anchoring. The sales staff is trained and experienced in recommending the proper anchoring application to fulfill the customers' needs.
