Do You Know What the Self-drilling Ahchor Bolt System Is? Let's figour it out together
Time:2022-01-12From:sinorock View:
The self-drilling anchor bolt system is a new technology developed in recent years, suitable for broken rock, loose soil and geological conditions where are difficult to drill holes. It helps to ensure anchoring effect in complex ground foundation and achieving best construction result.
The self-drilling anchor bolt system achieves the result of combining drilling, grouting, and anchoring into one step. When drilling in the loose rock or collapsing soil. It has three advantages compared to traditional methods: convenient to operating, high work efficiency, and good anchoring effect. can fill cracks, consolidate rock mass and soil layer through pressure grouting, and has good grouting spreading radius and reliable anchoring quality. That’s why I need to show you this product.
Thread
Two threads of self-drilling anchor bolt system are available. One is R thread, and another is T thread.
Components

A hollow bar, including variety of diameters, can be used as not only a drill pipe, but also a grout pipe and an anchor bolt;

Size | Outer Dia. (mm) |
Ultimate Load (kN) |
Yield Load (kN) |
Weight (Kg/m) |
SER25N | 25 | 200 | 150 | 2.35 |
SSR32L | 32 | 210 | 160 | 2.83 |
SSR32N | 32 | 280 | 230 | 3.50 |
SSR32S | 32 | 360 | 280 | 4.00 |
SER32L | 32 | 210 | 160 | 2.60 |
SER32N | 32 | 280 | 230 | 2.95 |
SER32S | 32 | 360 | 280 | 3.50 |
SER32S1 | 32 | 405 | 320 | 4.00 |
SCR32L1 | 32 | 250 | 190 | 2.60 |
SCR32N | 32 | 280 | 230 | 2.83 |
SSR38N | 38 | 500 | 400 | 5.50 |
SER38N | 38 | 500 | 400 | 4.95 |
SER38S | 38 | 550 | 450 | 5.90 |
SSR51L | 51 | 580 | 450 | 6.75 |
SSR51N | 51 | 800 | 630 | 9.00 |
SER51L | 51 | 550 | 450 | 6.20 |
SER51L1 | 51 | 660 | 540 | 6.75 |
SER51N | 51 | 800 | 630 | 8.20 |
SCR51S | 51 | 925 | 740 | 9.25 |
SST30L | 30 | 220 | 180 | 2.90 |
SST30N | 30 | 260 | 220 | 3.35 |
SST30S | 30 | 320 | 260 | 3.60 |
SST40N | 40 | 539 | 430 | 6.20 |
SST40S | 40 | 660 | 525 | 7.20 |
SET40N | 40 | 539 | 430 | 5.70 |
SET40S | 40 | 660 | 525 | 6.80 |
SST52N | 52 | 929 | 730 | 10.20 |
SET52N | 52 | 929 | 730 | 9.70 |
SET73L | 73 | 1160 | 970 | 13.20 |
SET73N | 73 | 1585 | 1270 | 17.80 |
SET73S | 40 | 1865 | 1430 | 21.20 |
SET76N | 76 | 1600 | 1200 | 16.50 |
SET76S | 76 | 1900 | 1500 | 19.70 |
SET103N | 103 | 2270 | 1800 | 23.50 |
SET103S | 103 | 3660 | 2670 | 44.60 |
SET111L | 111 | 2640 | 2000 | 25.00 |
SET111N | 111 | 3650 | 2750 | 34.50 |
SET127L | 127 | 2400 | 1810 | 30.50 |
SET130S | 130 | 7940 | 5250 | 78.00 |
SET130N | 130 | 6340 | 4200 | 78.00 |
SET150S | 150 | 8400 | 5600 | 108.00 |
SET200S | 200 | 14230 | 9500 | 183.00 |
A drill bit, which can be selected according to different geological condition, is made of steel or alloy;
A coupler, used to lengthen the hollow bar by connecting several ones together;
A bearing plate and a nut, which is forged with a center hole, is installed on the free segment of the hollow bar to transfer the pressure from the rock mass;
A centralizer, is used to ensure the hollow bar at the center of the drill hole when drilling.
Features and Advantages
Convenient to operate
Self drilling anchor bolt system combines drilling, grouting and anchoring together. Therefore, it is very convenient to operate for the broken rock and conditions which are difficult to drill holes. Casing pipe is omitted in construction, which greatly improves the construction efficiency.
Rich variety of drill bits
Self drilling anchor bolt system has a rich variety of drill bits, and the drill bits can be selected according to the properties of rock and soil, which can improve the drilling efficiency.
Reliable anchoring quality
Self drilling anchor bolt system can fill cracks, consolidate rock mass and soil layer through pressure grouting, and has good grouting spreading radius and reliable anchoring quality.
Work well in narrow space
The hollow anchor bar can be cut arbitrarily and lengthened by the coupler. Therefore, self drilling anchor bolt is suitable for the construction in the narrow space which the large equipment can not enter.
Construction process
Application
The self-drilling anchor bolt system is mainly used for tunnel and underground engineering, slope engineering, ground and foundation engineering. It can be used for pre-construction support and can effectively enhance the stability of soil and rock mass.
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