Articles
Influence of Bolt Length and Slope Ratio on Optimal Anchoring Angle
by Simone S. sinorockcoIn
recent years, accidents occur frequently due to slope collapse, open-pit mine landslides,
and high slopes of highway engineering. So how to maintain the stability of the
slope is becoming more and more important. What’s more, it is related to the
safety of human life and property as well as the safety of the project itself.
At
present, there are many ways of strengthening slopes, such as retaining walls, anti-slide
piles, Reinforcing rock and soil slopes with bolts, etc. The latter is an
important branch in the field of geotechnical engineering and has been widely applied
to a number of projects, which can give full play to the stability of the rock
and soil mass, improve the stress state and mechanical parameters of rock and
soil to maintain stability.
The
optimal anchoring angle is an important parameter in anchoring engineering
design and plays a vital role in the anchoring quality of the entire
engineering. So, what is the effect of bolt length and slope ratio on the
optimal anchoring angle? Through the calculation, it is found that the length
of the rock bolt and the slope ratio of the slope has a great influence on the
optimal anchoring angle, as follows:
The
safety factor of the slope increases first and then remains basically unchanged
with the increase of the length of the anchor rod. There is an effective
anchorage length. The larger the inclination angle of the anchor rod, the
smaller the effective anchorage length.
The
safety factor of the slope increases first and then decreases with the increase
of the inclination angle of the rock bolt, and there is an optimal anchoring
angle, and the optimal anchoring angle decreases linearly with the increase of
the length of the bolt.
When
the inclination angle of the rock bolt does not reach the optimal anchoring
angle, the slope ratio has little effect on the safety factor. However, when
the inclination angle of the anchor rod reaches or exceeds the optimal
anchoring angle, the influence of the slope ratio gradually appears. The higher
the slope ratio is, the larger the corresponding optimal anchoring angle.
There
are many types of rock bolts. Among these rock bolts, the self-drilling hollow
rock bolts are the best with the advantages of less disturbance to the original
rock, faster construction speed, lower cost, and safer.
The
self-drilling hollow rock bolt system is composed of a hollow anchor bar,
coupler, nut, drill bit, plate, and centralizer. It can combine drilling,
grouting, and anchoring in one process. It is suitable for broken rock, loose
soil, and geological conditions where is difficult to drill holes. It helps to
ensure the anchoring effect in complex ground conditions and achieve the best
construction result.
Sinorock
divides the rock bolts into R thread and T thread systems. The sizes of the self-drilling
hollow rock bolt include R25, R32, R38, R51, T30, T40, T52, T73, T76, T103,
T111, T127, T130, T150, and T200. We can choose different product sizes and types
according to different engineering requirements.
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About Simone S. 
sinorockco
8 connections, 0 recommendations, 106 honor points.Joined APSense since, November 28th, 2019, From LuoYang, China.
Created on Jun 24th 2022 22:56. Viewed 154 times.
