Drilling rock anchor bolts can overcome the difficulties that was brought by complex ground conditions

Drilling rock anchor bolts have played a crucial role in high slope of hydroelectric station. They have obvious features, such as single anchor bolt has big tensile pulling force, great depth and small project amount, it is suitable for different geological conditions. Adopting drilling rock anchor bolts to construct project can control or reduce the occurrence of rock burst, enhance ability of anti-seismic and control deformation effectively. It combines drilling, grouting and anchoring together, several processes can be done at the same time, which is time-saving and high-efficient. When encountering loose and broken surrounding rocks, it is difficult to drill holes and easy to collapse, while drilling rock anchor bolts can overcome this situation. After drilling hole, the anchor bolt still stays in the hole, which ignores collapse, saves time and reduce construction difficulties. In order to gain better support effect, you can also choose large diameter anchor bolt according to the ground condition, whose supporting effect is much better.

Sinorock is an anchor bolt manufacturer that concentrates on service and quality. Our international services department will source assemblies or finished goods in a variety of quantities or price ranges. Our engineered services are used by customers who need advice or help on implementation of Sinorock products and make the project more efficiency.

Self drilling hollow anchor bolt is a widely used anchoring method

Self drilling hollow anchor bolt is extensively applied in structure of foundation pit support, which mainly make use of anchor-hold in the layer of soil in order to maintain the stability of structure. While based on complex geological conditions, the security and supporting effect are more important, so the self drilling hollow anchor bar is quite necessary. Currently, anchor bolt 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. 

Sinorock self drilling hollow anchor bolt has historically been accepted as a widely used self-drilling anchoring method due to the hollow fully threaded bar can be used as both the drill tooling and the grouted anchor rod, thus installation is operated in a single procedure. We are committed to drive our sustainable development as part of our offering, our research, development and our attractiveness as an employer. Our objective is to contribute to global sustainable development, with products and solutions that support the creation of a more sustainable world. We show respect for people, the environment and the communities in which we are active.

Maximum tensile force of self drilling anchor is up to 1950KN

Self drilling anchor bolt is a kind of prestressed anchor, which combines drilling, grouting and anchoring together; the maximum tensile force is up to 1950KN.
Self drilling anchor bolt - Most commonly used in tunnel building and reinforcement, these long bolts work to increase a structure's stability. With a unique physical appearance and three specific anchoring types, a SDA bolt is one of the most commonly used anchoring techniques around the world.
All Sinorock Self drilling Anchor utilise a small diameter greased filled high density polyethylene sheathing, allowing for a greater number of individual strands to be contained in a given drill hole size.
Sinorock's Self drilling Anchor consists of continuous thread anchor bar, coupler, drill bit, nut and plate. It can make drilling, grouting and anchoring simultaneously without using casing pipe and drill rod.It's capable of being used in weak surrounding rock, crumbly strata and loose soil.
Our 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.

The Sinorock self drilling anchor system facilitates your work to a great extent, as it is capable of performing drilling, anchoring and injecting procedures all at once. The self drilling anchor system has a hollow interior, a threaded exterior and a drill bit that is used for drilling. The hollow interior of the self drilling anchor system allows air and water freely pass through the drilling process, flushing the particles. It also facilitates immediate injection following completion of the drilling process.
The self drilling anchor in Sinorock is an advanced anchor system which is composed of hollow anchor bar, nut, plate, coupler, drill bit and centralizer. If we want to be the most professional self drilling bolt manufacturer, we must do some innovation and reform on our products.

With strong penetrating drill bits,self drilling hollow anchor bolt can drill all kinds of rock

High-effect grouting fills cracks, solidifies rock and soil, and controls underground water, which has good grouting diffusion radius and reliable anchoring quality.
With strong penetrating drill bits,self drilling hollow anchor bolt can drill all kinds of rock.
Hollow anchor bolt doesn’t need to pull out, it can be used as grouting channel and grouts slurry.
Plug can keep strong grouting pressure, fill cracks adequately and fix broken rocks. Plate and nut can transmit stress to surrounding rocks evenly and achieve the goal of surrounding rocks and hollow anchor bolt support each other.

A majority of self drilling anchor system of Sinorock had positive effects on constructions includes mine,tunnel,foundation support project and anchoring performance over four years since established, echoing results from last year in a sample that is nearly three times as large.

Sinorock - self drilling anchor provide the optimal solution for nailing, bolting, micro piling and as ground anchors in difficult ground and rock conditions. The self drilling anchor system is manufactured with a cold deformed full length rolled thread as per standard and acts as the drill rod during the drilling operation. Once installed and grouted it converts into a very effective anchor. The use of this technology has the advantage that there is no need for cased drilling systems, which result in a simple installation method and economical savings on the project.

The self drilling anchor system of Sinorock has become an established tool in the industry for mining.Through innovation we have developed the simple and very effective self drilling anchor bolt system for supporting the mine in inaccessible places. Our expertise has stood us in well stead in a number of major long-term research projects.

SDA bolt has advantages in soil nailing wall

SDA bolt is the most basic constituent part of tunnel support. It reinforces tunnel with surrounding rocks, realizing self-support. Now, SDA bolt can not only applied in tunnel, but also in engineering technology, having reinforcement for slope, mine, dam and infrastructure construction. Especially in fractured rock mass, the function of rock bolt is obvious.
In the short term, from perspective of dominant benefit and taking tunnel for example, anchor bolt’s unit price is high. Compared with common supporting method, tunnel’s composite cost and total cost has got increased.
In the long term, from perspective of recessive benefit, anchor bolt can be anchored overall length sufficiently, it can also provide certain supporting resistance immediately after excavation to control surrounding rock’s looseness and deformation, ignore deceleration of engineering construction and occurrence of collapse or other accidents. Through grouting, SDA bolt can provide enough and even protective layer, enhance anchor bolt’s durability largely. These recessive economic benefits of anchor bolt cannot be matched by common supporting method.
SDA bolts applied in composite soil nailing wall in soft soil area can effectively solve the
problems of shrinkage, liquefaction, piping, quicksand, drilling, etc. Compared with steel pipe and rebar, SDA bolt has the following advantages in soft soil area of soil nailing wall engineering:
(1) It’s suitable for all kinds of soil layers, especially in silty soil and sandy soil which are
hard to construct in the conventional soil nailing wall.
(2) The length of the soil nail is not limited. Despite the restrictions of the existing soil nailing materials and construction equipment, the drilling length of anchor bolt is much longer than the conventional soil nailing wall due to small drilling resistance.
(3) It can be easily applied prestress and conducive to displacement control.
(4) It will save workload. Anchor bolts combine drilling, grouting, installing and anchoring in a process, simplifying the construction process.
(5) It’s suitable for construction in the narrow place. Anchor bolt has the characteristics of
cutting and lengthening, which can be used for the small drilling machine and narrow space.
(6) Using cement slurry to stabilize the hole wall. While supplying water slurry, the slurry can be quickly absorbed in the non - sticky soil layer and ensure the stability of the hole wall.

High quality self-drilling rock anchor for globe customers

The self drilling anchor system of Sinorock has a widely application, It is usually used to broken rock,loose soil and conditions which difficult to drill holes,such as fracture zones,decayed rock,gravel ect.Especially in the sand gravel stratum, using the traditional method of anchoring, the low probability of pore formation makes it difficult to grout and anchor lately and also increases construction costs.
Sinorock self drilling rock anchor engineering products provide a service life in excess of 10 years based on research which has been
accepted by both Railtrack and the Highways Agency.Our commitment to providing you with the optimum in ground engineering solutions is
illustrated by our investment in independent research programmes, which enable us to develop and refine the performance and quality of our
products for a wide variety of ground conditions.

Sinorock has been striving to manufacture high quality self-drilling rock anchor for globe customers in mineral exploration, underground mining in soft and hard rock, surface mining and construction, tunneling, slope stabilization industry and etc. And we gradually become one of the most credible Chinese manufacturers in the industry.
Sinorock is built upon its values of excellence.The reliability of our performance and the enduring quality of our self drilling rock anchor products, are evidenced in all works we have done for our customers. We never rest and continually strive to improve our performance through our standard ISO systems and other initiatives.With testing laboratory inhouse,from the beginning of raw materials to finished products deliveried to our clients,our inspection department will gurantee everything runnig as per standard.

Maintaining construction specs need Sinorock self drilling anchors

Maintaining construction specs can be an arduous task when custom self drilling anchors are needed. Our specialty is being able to create the exact size and measurement of rock bolts for your construction project.
When a steel-framed structure is built, it usually features a steel frame that rests on concrete foundations. The structural steel must be connected to the foundation or the building will collapse before it is completed. The traditional way to set anchor bolts in concrete is to embed large diameter anchor bolts in the concrete foundation while it is being poured. When the concrete has set and cured, these anchor bolts cannot be pulled out of the concrete without destroying the foundation.
The structural engineer designs the concrete foundation's dimensions and the length, diameter, and spacing of the bolts; he also specifies the size of the steel columns, flanges, and bolt holes.
This anchor bolt system provides a strong connection between column and foundation. Its disadvantage is that it leaves little room for error.
Sinorock is proud to offer only the most durable, high-quality materials for any type of construction project. Our specialty is self
drilling anchors,including coupler,anchor nut,centralizer,drill bit,anchor plate and hollow bar,etc.we are committed to providing our
customers with the self drilling anchors they need for any project. We also make sure that our self drilling anchors meet any/all plating requirements, so our customers can be confident that the products they purchase from us will
really last!