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The Best Slope Reinforcement Method - Slope Reinforcement by Rock Anchoring

Slope is a very common terrain in highway and railway engineering. During the construction process, it needs to be reinforced and supported by various methods to prevent it from collapsing, falling rocks, uneven slope stress distribution and other problems, reducing safety. hidden danger. There are many methods for slope support, including gravity retaining wall, thin-wall retaining wall, spray anchor support and self-drilling rock bolt support. Today, Sinorock will introduce and analyze the following methods in detail. Advantages and disadvantages of four common slope support methods.

Supporting the slope by the self-gravity of the retaining wall

Gravity retaining wall slope support is a relatively traditional and common slope support method. Its principle is to use the gravity of the slope body or the wall itself to resist the side pressure of the slope. Gravity retaining walls can be made of concrete, block stone, rubble, etc. as masonry, or concrete can be directly poured on the slope surface, and are often used in highways, harbors, railways, mines and other projects.

Advantages: easy to obtain materials and construction, low cost.

Disadvantages: large volume and weight, and it is difficult for weak geology to bear its weight.

Applicable situation: the height of the slope is not large, and the materials can be obtained locally

Slope Support with Thin Wall Reinforced Concrete

That is, the thin-walled retaining wall belongs to the light retaining wall, which is divided into buttress type and cantilever type.

Advantages: simple structure, convenient construction, light weight

Disadvantages: It needs to consume a certain amount of steel and cement. If the slope height is relatively large, the amount of steel will be doubled and the cost will be higher.

Applicable situation: small slope height

Ordinary bolt support (bolt shotcrete support)

Slope shotcrete support is a support method in which concrete and ordinary hollow bolts are combined to bear the slope weight together with the surrounding rock of the slope. Shotcrete support is a more complicated support method, and the construction process is also more complicated. Shotcrete anchor support is to drill holes on the slope first, then insert the bolts, and then use high pressure to drive the cement slurry into the drilled holes through the bolts to reinforce the surrounding rock mass together with the bolts. Although this support method can effectively limit the deformation of the surrounding rock, adjust the stress distribution of the rock mass, and prevent the rock mass from collapsing and falling, the construction process is too complicated and the efficiency is extremely low.

Advantages: strong adhesion, strong penetration, firm and reliable support

Disadvantages: complex construction process, difficult construction, low efficiency

Applicable situation: can be used for temporary support of engineering slopes

Self-drilling Rock bolt for slope support

The self-drilling rock bolt slope support is similar to the shotcrete support, but the efficiency is much higher than that of the shotcrete support. Most ordinary hollow bolts need to be drilled with drill pipes first, then the bolts are inserted, and then connected with the grouting machine for grouting, while the self-drilling rock bolts are both drill pipes and bolts. After the rotary grouting adapter is connected to the grouting machine, grouting can be performed at the same time as drilling, realizing the integration of drilling, grouting and anchoring functions, simplifying the construction process and shortening the construction time.

Advantages: convenient construction, strong anchoring force, high efficiency

Disadvantages: It is necessary to use a special drilling rig for self-drilling rock bolts for construction. There are few domestic manufacturers of self-drilling rock bolts, and there are also fewer self-drilling rock bolting rigs.

Applicable situation: It is suitable for soft to medium hard rock formations, especially suitable for soft rock formations, easy to collapse holes and difficult to form holes.