A flexible umbrella-shaped support bolt and its method for supporting soil slopes

Abstract

The invention relates to a flexible umbrella supporting anchor bolt and a method for supporting a soil slope thereby. An end ring and an end circular connector are fixedly disposed at one end of a round anchor bolt. A spring circular connector and a middle ring are fixedly disposed in the middle of the round anchor bolt. A lower circular connector adjacent to the right side of the middle ring movably sleeves the round anchor bolt. A drag umbrella surrounding the round anchor bolt comprises reacting plates evenly arranged, pull rods and compression springs. One end of a flexible pull rope is fixed to a round hole arranged in the other end of the round anchor bolt. More than one flexible umbrella supporting anchor bolt is connected with a soil high slope protective structure, composed of a geogrid mesh, a vegetation protective layer and a retaining wall, through the flexible pull ropes, and a whole for firmly and reliably anchoring and protecting the soil high slope is formed. The umbrella reacting plates are connected with the protective structural mesh through the flexible pull rope, anchoring force is greatly higher than that of a traditional anchor bolt, anchoring effect is more reliable, and engineering cost can be decreased by 50-60%.

Description

technical field [0001] The invention relates to the field of geotechnical engineering slope protection, in particular to a flexible umbrella-shaped support bolt and a method for supporting soil layer slopes. Background technique [0002] Since 1912, Germany was the first to use bolts to support underground roadways. Bolts have been widely used in civil engineering because of their simple structure, convenient construction, low cost and strong adaptability to engineering. The anchors can be divided into soil anchors and rock anchors according to their different reinforcement objects. The soil anchors and rock anchors are somewhat similar in name, but their purposes and functions are very different. The rock bolt is mainly through the suspension effect of the anchor rod, the effect of the composite beam, the effect of the composite arch, the effect of reducing the span, and the reinforcement effect to stabilize the broken and weak rock formation itself. The soil anchor is mai...

AI Technical Summary

Problems solved by technology

At present, the traditional anchor rods in the flexible vegetation protection structure used in soil slopes have the following deficiencies: 1. The anchoring capacity of the anchor rods is insufficient, and the phenomenon that the slope protection structure takes out the anchor rods and the slope collapses often occurs

2. In the slope flexible vegetation protection structure, the connection and fixation between the traditional steel anchor rod and the flexible net is not reliable, and it is easy to cause the detachment of the anchor rod and the protective flexible net, resulting in local collapse

3. Since the steel anchor bolt needs to be grouted for protection to prevent the corrosion of the steel bar, which increases the project cost

If the anti-corrosion treatment of steel bars is not in place, the service life of the anchor will be greatly reduced, thereby reducing the service life of the slope protection

4. For large soil high slopes, flexible vegetation protection requires a large number of steel anchors, which makes the project cost very high

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