Self drilling bolt is mainly used in tunneling pre-support, which is widely used in mining, tunneling, railway, metro tunnel projects. T40 self drilling bolt takes a significant place in T-thread types for its superior reliability and extensive application in railway system and metro tunnel project. 
Sinorock self drilling anchor bolts have been devoting themselves to a large number of famous metro tunnels at home and abroad, such as Beijing Metro line 10, Harbin Metro and Santiago Metro Line 6, etc. Self drilling bolt has a significant advantage of reducing construction cost and shorten construction period due to the feature of simultaneous drilling, installation and grouting. 

Sinorock is an experienced manufacturer of anchoring products for both domestic and 
international market. Based on the pressure of market competition, recent years, we did some 
researches on anchor productions, counterparts, marketing environment and sustainable 
development. And then we make our new strategy, decision and project.

Sinorock is specialized in the development, production and sales of anchoring products. All 
the products delivered to customers have passed strict quality testing. We insist on the 
value of innovation, profession, responsibility and efficiency. We have passed the ISO9001 
quality management system certification and all we provided to the clients are reliable 
products.

Sinorock - - a leading anchor bolt manufacturer from China,it's anchor bolt products sell so hot in China.Sinorock anchor bolt systems can be used to stabilize slopes, support rocks at shallow or steep depths, prevent cave-ins, and offer tunnel support. With quick, efficient installation, it combines drilling, placing, and grouting all in one operation.And our anchor bolt system can be served as the an economical solution for challenging soil conditions where installing conventional micropiles may not be the best option.
The self drilling anchor bolt with high-intensity has higher safety factor.With great efficient grouting,the self drilling rock bolt is capable of filling the boreholes with sufficient cement that provides solid bonding stree between cavity and anchor rod.Self drilling bolt appears a sound quality in stablizing rocks and soils,controling underground water depending on the nice injection extended radius and reliable anchoring effect.

With the reliable brand, you are assured of product performance, strong marketing, and support programs that only Sinorock can provide. So as advantage of being seller of material of self drilling rock bolt, we have confidence to give you a better offer with competitive price and reliable quality. Put our heart into work to keep you be satisfactory forever.Sinorock recognized the industry leader, will be your first choice brand. Sinorock continue to insist consumers market-oriented, technological innovation be the core and best attitude to serve each clients.

With the increase communication and cooperation, Chinese enterprises also increase participation and investment to the overseas projects. Sinorock has many years of professional experience in the construction of hydropower projects and much knowledge of the construction requirements of the overseas projects.Sinorock has won great reputation owing to reliable products and excellent services.
Sinorock anchor bolt system can be used as stabilization of tunnel portals, fore-poling, face stabilization, spilling, root piling and radial systematic anchoring, which is the choice of most engineers for tunnel engineering construction.Sinorock stainless steel anchor bolt is often used in subsea tunnel which has certain resistance to air, water and chemical reagents. So it has longer life, generally it can reach about 120 years. 

SDA bolt has better properties than solid steel tube with the same cross section area due to the higher buckling and bending stability in the same tensile load and resistance.

When dynamic pressure grouting with cement suspension is used during drilling, the cement slurry and the surrounding soil form mechanical interlocking without casing. The mechanical interlocking effect enhances the shear adhesion. This means that the displacement of the non prestressed grouting pile head is only a few millimeters.

As a micropile, SDA bolt can be used as a tensile pile and also a compressible pile. It can be installed according to the certain angle of inclination to provide the solution of the mesh pile.
The use of self drilling anchor bar in the poor geological conditions for slope reinforcement will obviously speed up construction progress and save project cost. Moreover, self drilling anchor will successfully solve the problems of hole collapse encountered in the sand layer and weathered strata, and drilling difficulties of rock bolt and cable bolt. 

Because of its unique construction technology and lots of advantages, self drilling anchor is well worth popularizing and applying.

Currently,self drilling hollow bar support technology has been applied to many projects, but the project has a certain complexity and uncertainty, every concrete construction of geotechnical engineering, has its own particularity. 

As pile foundation, self drilling hollow bar not only has the properties of the same kind bored pile and steel-pipe pile, but also has its own properties. With disposable drill bit, self drilling hollow bar can drill faster and deeper.
Self drill anchors  are effective in a variety of ground conditions, including gravel, clay, rock, sand and made ground. This method of mini piling is used in a wide range of projects including rail related work and foundation upgrades, stabilisation and underpinning as well as facade retention, tension piles, road works and bridge works.

At Sinorock, we are a pioneer in this anchor bolt field in China. We have invested substantially in specialized construction equipment & machinery, which is operated by a team of experienced technical & operation staff from China & abroad. With our specialized equipment, experienced management and technical & operational staff, we aim to offer any ground engineering solutions which are unique, cost effective and time saving to meet present market needs. Our long term experience resulted in various cost deductions measure. 
Sinorock use its anchor bolt system for solving these problems which occurs in construction.
Sinorock has been known as a major source for construction materials used in civil and 

structural engineering.Sinorock offers vast range of technical products and total solutions 

to general contractors, as well as to consultants.

Sinorock is the recognised leader in providing rock and soil anchoring solutions to the civil engineering and construction markets.

Ground anchors are effectively restraining devices used in many different typesof structures including retaining walls, dams, wharves, bridge abutments and foundations for buildings. Ground anchors are stressed (active anchorage) to prevent structural movement and they typically transfer their load over a fixed length.

These are commonly referred to as tension anchors and are suited for strong rock conditions. For anchors founded in soil or weak rock, load distributive compressive (and tension) anchors are used as they rely on the succession of small successive bond lengths rather than one unique longer bond length.

http://selfdrillanchor.blogcu.com/self-drilling-anchors-are-tension-elements-for-construction/23524665

Urban deep foundation excavations are generally surrounded with dense buildings. So their working space is very narrow, especially when they are close to the foundations of adjacent buildings or structures in construction. Many scholars, engineers and technicians have already worked a lot in the displacement-controlling design of deep foundation excavations recent years, however, difficulty remains to be solved in correlation among the retaining structures, soil deformation around the excavations and the displacements of adjacent structures.
Self drilling bolt system is a flexible shoring system and is constructed from top to the bottom in steps parallel to excavation.
At Sinorock, we believe the result is innovative technology and solution-oriented products like our self drilling anchor system, soil nail and micropile systems and our environmentally conscious deep foundation system for wind turbine towers and transmission line towers. 
Sinorock has worked with very closely with our raw material producers in order to achieve SGS&CE compliance,and can guarantee the quality 

from source, as needed for those products which become part of the Supply Chain to our ultimate Customers.

http://www.imfaceplate.com/selfdrillinganchor/self-drilling-anchor-bolts-are-useful-elements-of-a-buildings-foundation-found-deep-in-the-ground

The main elements of the system are self drilling anchors, reinforced shotcrete surface cover and subhorizontal drains.The length and spacing of the self drilling anchors are variable depending on the depth of the excavation, environmental loads and soil conditions, etc.
In this self drilling anchor system, depending on the ground conditions after each excavation stage pre-shotconcrete is applied, followed by passive anchor drilling. Appropriate reinforcement is placed into the drill holes according to the design and the drill hole around the reinforcement is grouted with cement grout.
In this self drilling anchor system, depending on the ground conditions after each excavation stage pre-shotconcrete is applied, followed 

by passive anchor drilling. Appropriate reinforcement is placed into the drill holes according to the design and the drill hole around the reinforcement is grouted with cement grout.

Besides tunneling,mining,slope foundation,civil construction,

Sinorock's high quality self drilling anchor systems also work to stabilise foundations and support structures for excavation, making worksites safer. We work closely with geotechnical engineers to assist with project design and selection of anchor type after consideration of ground conditions, ensuring lasting integrity of all our self drilling anchor systems.

http://selfdrillinganchor.mihanblog.com/post/2

The broken loose surrounding rock is full of instability. It’s easy to collapse and lead to loose displacement. The pressure is relatively large. Therefore it needs that kind of rock bolt which can support the rock at once after installation, own sufficient prestress and whole-grouted, and even infiltrate surrounding rock fissures.
 
On one hand, the surrounding rock is broken, which makes the drilling holes are difficult to form. On the other hand, there are such special situations which require minimize vibration to avoid collapse.
As an important form of reinforcement in geotechnical engineering,rock bolt supporting is safe, effective, and economical, etc. 
Therefore, the rock bolt will have more and more application in the international geotechnical engineering fields.
Self drilling rock bolt is widely used in railway construction, Tunneling, mining, hydropower station, dam, bridge base, foundation reinforcement of buildings. Furthermore, it is workable for the repair of ground subsidence, hole collapse, crack,  landslip and other geological disaster. 
If you are in need of self drillling rock bolt system, Sinorock is your direct manufacturing source. Our in-house shop is able to produce all types of self drillling bolts for all applications. Cutting, bending, threading, or welding, we are capable of fulfilling your order requirements. Contact Sinorock today to have us quote on your next project that requires concrete anchor bolts of any size and quantity.

Sinorock supplies its products to a number of different industries, some of which are: marine, pre-cast concrete, railroad, electrical &hydro contractors, steel fabrication and bridge builders.Our attention to quality, service and timely deliveries make us the best choice for your self drilling bolt system needs.

"Russia, Spain, France, the United States, Brazil and Chile are expected to be our main markets."One of the managers of Sinorock said,as you know that the major type of self drillling bolt,like R32,R51,T40 self drilling hollow anchor,are the most popular subjects around our clients,they are capable of combining drilling,anchoring,grouting together in a single operation.

http://www.imfaceplate.com/selfdrillinganchor/sinorocks-self-drilling-ground-anchor-system-are-in-use-around-the-world

The self drilling anchor bar has a unique yielding behavior that can be achieved only with the proper steel manufacturing, which results in bolts that provide a high ultimate load with a large deformation capability.
Self drilling anchor support as a way of supporting, and there is a fundamental difference in traditional way of support.Traditional way of supporting is often caused by passive collapsed rock mass under loading, but anchor bolt supporting can actively strengthening rock and soil body, effectively control the deformation, prevents the occurrence of collapse.The main function of  self drilling anchor supporting is suspensory action, cut across function, and the roles of composite beams and extrusion strengthening effect.

The self drilling anchor of foundation support applied for other buildings or streets around the foundation pit, deep foundation pit or the poor soil stability conditions.Self drilling anchor bolt through the friction of  its soil and soil pressure on the bolt, and if necessary, also anchor pipe can be added when necessary for stronger support to deal with a large area of soft soil layer. For foundation support, anchor supporting has flexible, economic and easy to operate, safe and fast these features.And in the process of the installation of the self drilling anchor bolt, which won't generate a lot of noise and strict with construction site, even if it also can complete the set up in the narrow space.
For 5 years，Sinorock has been offering the self drilling anchor bolt as a unique, safe and reliable system of rock support. As the market leader in underground rock excavation technology,Sinorock has also been developing safer and more efficient rock reinforcement products such as the Manganese line anchor bolts, which are manufactured from a special type of steel. 

http://selfdrillanchor.hatenablog.com/entry/2016/07/18/161248