rockanchoring

In order to ensure the construction safety and quality, ​self drilling anchor bolt​ is largely applied to the side wall and arch part of the tunnel excavation project. Self drilling anchor bolt can farthest ensure the grouting efficiency, completely solve the defects of traditional bolts. In the excavation process of Dongyangguan tunnel of Changhan highway, a large number of self drilling anchor bolts were used for supporting surrounding rocks and received good effect. It not only ensured the quality of the project, but also ensured the construction period of the tunnel.
​Self drilling rock anchor system​ is a new type of anchoring technology, which is used in foundation pit, highway, tunnel, slope support and other engineering fields. Self drilling anchor system integrates drilling, grouting, installing and anchoring processes in one operation. It has the advantages of simple process, high construction efficiency, good economic benefit, etc. This system will overcome the problems of narrow aperture, hole collapse and hole forming during drilling hole in loose broken rock and soil and sandy gravel layer and have a good anchoring effect. 
One open pit of iron mine had always been downward creep deformation. The upper landslide body was backfilled and sandy gravel layer of 24m thickness. While the lower was iron ore and gneiss of 56m thickness. The original design of the upper landslide body used 2m full-length bond anchor bolt and C20 shotcrete reinforcement. In the course of drilling hole by the full-length bond anchor bolt, it appeared hole shrinkage and hole collapse. After drilling, it’s hard to install and grout in anchor bolt, which caused that it was impossible to construct. Afterwards, self drilling anchor system is designed to replace full-length bond anchor bolt. The landslide body was effectively anchored and got obvious effect. 
Self drilling anchor system has solved the problems of hole shrinkage and hole collapse caused by drilling in sandy gravel layer, which played a good anchoring effect, achieved a purpose of supporting sandy gravel layer in the slope. It can be extensively applied in other loose rocks and soils.

Sinorock self drilling rock bolt system composes a total of six components including the anchor
body.They are drill bit, coupler, grout stopper, arch plate, and nut. Grout injection adapters and
steel shank can be included in the order upon request. These accessories are essential to the anchor
system’s overall functionality.Sinorock continues to provide both innovative and cost-effective
solutions in rock bolt industry.
Sinorock rock bolt system is a reliable and convenient anchoring system which is applied in
complicated geological conditions for rock support work. It is particularly applied in the following
geological conditions, such as weathered rock, gravel layer, backfill, hard conglomerate, etc. It is
widely used in tunneling, mine, slope stabilization and foundation support.
And Sinorock quality control system is the guarantee for our self drilling rock bolt.At Sinorock，we are proud of our quality program and the reputation that it has brought us.And our SDA bolt product is a guarantee for your project.As one of the important support in civil construction, underground project and slope stabilization. Self drilling bolts are extensively used on all types of projects, from standard buildings to dams and nuclear power plants.Close by, we deliver quality products, superior customer service, advanced technology, and real solutions to the mining and tunneling industries.
Sinorock has experienced significant growth over the past several years due to the acceptance and promotion of our products by well-respected engineering and contracting firms around the world. We have all seen how product quality plays a fundamental role in construction safety and structural performance. This is now all the more important during the period of rapid globalisation that we are seeing within our industry. Over decades of progress have consistently made us realize that more than products,it is understanding the client’s requirement and giving maximum services to the customer is what makes us stand apart from others.

Self drilling rock anchor has the following advantages for advanced support:

(1) Self drilling rock anchor and drill rod can be merged into one, with a small diameter drill bit and without eccentric block. It’s easy to drill;

(2) Drilling the hole directly, no need to be pulled out and no collapse and blockage phenomenon;

(3) The anchor bar is hollow, which can be effectively grouting and bear large load, ensuring the grouting diffusion radius and the anchoring effect of surrounding rocks;

(4) The pipe-shed is short and easy to install, easy to operate, and can work at multi-points simultaneously.

Sinorock is a dynamic emerging rock bolt manufacturer. In the development of several years, Sinorock gradually established its own positioning: geotechnical anchoring industry experts. We devote ourselves to create world-famous rock bolt manufacturer. We have a goal which is producing first-class anchoring products and serving world high-end customers.

As a professional rock bolt manufacturer, our main products include: self drilling anchor system, fiberglass anchor bolt, expansion shell, rock dill and eternal spacer.

Sinorock has passed the ISO 9001 quality management system certification and CE certification which are the authoritative standards for rock bolt manufacturer. We provide reliable quality and low-cost for global customers with advanced production equipment and strict quality control system. We have Tensile Testing Machine to test the bar quality to guarantee all of the products delivered to customers are qualified. Quality is the life of our company.

The reinforcement of expansive soil cutting slope has been a difficulty for the construction industry. And Sinorock carries a wide range of self drilling rock anchors to fit a variety of construction projects. You can choose among various lengths, load ratings and materials to find the perfect rock bolts to safely complete your project.
Self drilling rock anchors can be used in civil work and grouting in softer rocks, especially the loose ground and sections prone to collapse. Self drilling rock anchor stabilises the slopes which are highly weathered or broken. Self drilling rock anchor can also be used for rock pinning and rock dowel applications where localized reinforcing of the rock face is required.Self drilling rock anchors are typically regarded as lightly loaded, full bonded installations, for low risk applications.
Self drilling rock anchors are used in new construction to secure a structure’s walls to concrete slabs and foundation walls, to fasten steel columns to concrete piers and to anchor machinery to concrete pads.These rock bolts are sunk into the wet concrete by hand immediately after the concrete slab is poured. You can leave as much of the bolt sticking out of the slab as you need. The rock bolt can be straightened or plumbed as the concrete hardens.

With reliable products and great service, Sinorock has won good reputation from all over the world.Self drilling rock anchor bolts of Sinorock are usually used in civil construction, like micro pile, slope stabilization, bridge building.
Sinorock is growing to be the most professional supplier among self drilling rock anchor bolt manufacturers in geotechnical engineering and construction industries in Asia. We are proud to make good products that make the industries we serve safer and more efficient.Sinorock uses only high-quality, reliable self drilling rock anchor bolt products in combination with the most innovative and high-tech solutions. This means that aside from competitive prices, these changes are cost-effective because they protect your investment for years to come.We emphasize on quality products that cater for today’s competitive and demanding business environment. Coupled with advanced manufacturing technology and stringent quality control, we strive to ensure our products achieve high level of standards.

SDA bolt is a kind of prestressed anchor, which combines drilling, grouting and anchoring together; the maximum tensile force is up to 1950KN.
SDA bolt is a fully threaded steel bar which can be drilled and grouted into loose or collapsing soils without a casing. The bar features a hollow center for simultaneous drilling and grouting and a rope thread for connection to standard drill tooling. SDA forms a standard rope thread profile (R25 – R51, T76 has a trapezoidal thread). SDA can be installed into a variety of different soils and ground conditions ranging from sand and gravel to inconsistent fill, boulders, rubble and weathered rock, as well as through footings and base slabs.
Sinorock – Our company benefits from the dedication and combined strength of Technical & Commercial Staff.Today, we wish to be considered among manufacturers of self drilling anchor bolt system and special bolting as a reference, not only for precise and accurate manufacturing reliability but also for service performance.

Self drilling rock anchors of Sinorock are available in a wide selection of sizes to best meet your requirements. We maintain a fully stocked inventory so that we always have the products you need, when you need them. Complete your construction project with the best tools from a company you can rely on to deliver quality parts. When you are looking for the best, consider Sinorock to seamlessly handle all of your needs.

Sinorock was formed in 2011 by a group of experts from different sectors of the construction
rock bolt industry, each of them bring 20 years of civil engineering experiences to Sinorock. From the
very start Sinorock has been specializing in tunnelling and shaft construction projects.
From tunneling constructions to civil constructions, we are able to meet your needs.

To achieve and meets our clients requirement and expectation, Sinorock had acquired the best
equipments on the market to outfit our self drilling rock bolt. We have rock drill
Machines as well as Hydraulic Jumbo Drills. But more than just the machines, our team of
well-trained managers, supervisors and workers will see that the job gets done in a timely
manner.We count among our clients several government departments, such as DSI, TEL and Titan, as well as numerous developers.

Rock bolt support should be carried out according to rock soil survey report for design,
first should measure according to anchorage soil of rock bolt to determine which the soil is
suitable anchorage, second, according to the soil mechanical theory formula to determine the
anchorage length of rock bolt and anchor length,and determine anchor Angle, the number of
layout and arrangement, etc., while according to pit of important grade measuring related
data whether exceeded, such as being reinforced soil top horizontal displacement, etc.
Finally check the waist on the tension side beam tensile stress and to ensure that each item
can meet the requirements.
Self drilling rock bolts are widely used as an efficient anchoring means, for drilling,
grouting and anchoring in tunnel pre-support, slope anchor, mining, roadbed reinforcement
and other projects, and they can work well in narrow space. We also provide accessories of
drilling tools, like anchor bits, coupling, spherical nuts, plates, and stopper.
As the expert in self drilling bolt system field,Sinorock is outstanding.Here We will stated
how to install self drilling bolt in Concrete.
Self drilling bolts are an essential part of concrete construction. These are bolts, placed
in the concrete with the threaded side up. They allow you to secure wall forms or other
portions of the construction onto the concrete foundation slab. It’s important when placing
rock bolts to place them carefully and accurately, since moving them later will be extremely
difficult and will hold up your construction project significantly.

Sinorock carry a comprehensive range of various self drilling rock bolts,generally speaking,
we have two categories as below:
1,R25N, R32L, R32N, R32S, R38N,R51N, T76N, T76S, T111N, T111S
2,T30/16,T30/14,T40/16,T40/20,T52/26,T73/53,T73/45,T73/35,T103/78,T103/51
All self drilling rock bolts can be manufactured in different lengths, like 2 meters, 3
meters, 4 meters, 6 meters or 9 meters. Both left hand thread and right hand thread are
available upon customers request.
Besides, we also supply a complete range of accessories, including coupling sleeves, steel
plates, nuts, centralizers, and various anchor bits.
Sinorock has focused on creating self drilling rock bolt products that help people build
safer and stronger homes and buildings.
Considered a leader in rock bolt systems research, testing and innovation, Sinorock® is one
of the largest rock bolts suppliers in the world.
During construction, because of height differences between high-rise buildings, load and
distribution of structural rigidity are uneven, which maybe bring subsidence of different
parts’ foundation, cause inclination of inner structure or cracks, even threaten people’s
living security. So when designing and planning high-rise buildings, questions of foundation
subsidence need to be considered and preventive measures should be discussed to avoid the
emergence of danger.
1. Ensuring the accuracy and integrity of geological data.
Generally speaking, natural stratum has compressibility with different extents, such as rock
mass and soil layer. When received outer force or own gravity, compression will appear and
then phenomenon of subsidence will happen.
Before construction, project’s managers should strengthen supervision of geological
explosion work, make serious analysis to ensure the accuracy and integrity of geological
data. Geological environment should be also mastered well, such as property of soil layer,
distribution of underground water, etc. Also, education and training work should be carried
out for explorers.
2. Choosing self drilling rock bolt with good tensile and yield strength.
During the construction of high-rise buildings, self drilling anchor bolt has good
supporting effect and has played an important role. Under simple tension or compression, the
stress which plastic flow needs will increase with the deformation, that’s tension
strength. After the elastic deformation of self drilling anchor bolt reaching limitation,
its strength will occur fluctuation within a narrow range, then the plastic deformation
begins, that’s yield strength. Actually, tensile and yield strength are functions
determined by deformation speed, deformation temperature and deformation degree, these
functions influence each other and have relevance with property of self drilling anchor
bolt.
Generally speaking, self drilling rock bolt’s anchorage force is determined by stability
analysis, then the amount, form, size and length of self drilling rock bolt will be
confirmed.
3. Designing foundation height and decreasing precipitation processing.
During the foundation construction of high-rise buildings, reasonable foundation height
should be confirmed and precipitation processing should be decreased. Generally, the upper
structure of high-rise buildings is quite stable, to avoid uneven subsidence, the foundation
height should be confirmed reasonably. Researches show that precipitation processing has
certain influence on uneven subsidence, which will also increase the probability of uneven
subsidence.
4. Carrying out quality inspection work of foundation subsidence.
During the design process of high-rise buildings, the interaction between upper structure
and foundation should be analyzed and necessary measures should be adopted to enhance
buildings’ intensity, increase general bearing capacity and avoid deformation. Quality
inspectors should test design parameters, stability and depth of foundation, etc.

In all kinds of engineering construction of weak surrounding rock, fault fracture zone,high ground stress, the complex geological conditions, such as large deformation andso on complex conditions to bring huge difficulties for construction, especially inthe serious hole collapse condition and need to a lengthen bolt these circumstances , most of the short anchor rod ability, however,Sinorock rock bolt grouting in processing all kinds of slope can have a very good improvement of surrounding rock and achieve the ideal supporting effect.
Sinorock self drilling rock bolt system composes a total of six components including the
anchor body.They are drill bit, coupler, grout stopper, arch plate, and nut. Grout injection
adapters and steel shank can be included in the order upon request. These accessories are
essential to the anchor system’s overall functionality.
Sinorock’s self drilling rock bolt system are extensively used for connection applications within the construction, engineering and manufacturing industries. Our largest market is the construction industry where we offer our customers highly engineered anchoring products for precast concrete elements; curtain wall and building facades; structural connections within commercial, public and residential construction; as well as anchoring solutions for tunnels, civil engineering and transportation structures.

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The production of SDA bolt system from Sinorock has increased progressively to cover the national markets due to the competitiveness level reached by our company after both the metal treatment technology innovation and the experience made in the field during these past years.The updating of the production processes according to the quality assurance certification ISO 9001:2008, implemented since
long time now, guarantees very high standardslevels of our products.From restricted access ground anchoring to open field anchoring, our projects range from residential to large scale commercial works. Our self drilling anchor systems provide a range of structural benefits, including resisting uplift to transferring external forces to the ground for large structures,such as tunneling,mining,hydroelectric,slope foundation.

There are a number of reasons why Sinorock self drilling rock anchors and accessories are better than the rest – not just our products but our staff and services too.
We have been making and developing our ground anchoring system since 2011 which gives us a comprehensive understanding of installing our secure anchors in all types of soil and weather conditions throughout the Asia and beyond.
We pride ourselves on the quality of advice we provide to any and all customers. We have the designer and developer of the self drilling anchor range on site to provide customers with guidance and technical support on installing the full range of secure anchors.
Our extensive knowledge of ground anchoring comes from both developing the product range and installing them at many national events from
Glastonbury and Boomtown Fair to The Royal Welsh Show and many, many more. It’s this ‘hands on’ experience that gives our team superior
knowledge and understanding of how the product works in many different soil types and conditions.
We pride ourselves on our design and manufacturing expertise and we’ve helped many of our customers with bespoke brackets and fixings. Our self drilling anchors are easy to install and easy to remove – they provide superior load results and are a first class solution to most
outdoor anchoring challenges.