6 Methods to Support Slopes of Railway, Highway, or Foundation

Most of the slopes on both sides of expressways, railways, and high-speed railways, need to be supported to ensure normal railway transportation. There are many common slope support methods, which need to be selected according to the soil conditions of the construction site and the support requirements. Here, Sinorock will introduce the common slope support methods for you.

Anchor bolt support

1. Traditional anchor bolt support

Generally, the concrete is used in combination with ordinary hollow bolts. First, drill holes on the slope, then insert the bolts, and then use high pressure to drive the cement slurry through the bolts into the holes to reinforce the surrounding rock mass together with the bolts. It is suitable for temporary support of engineering slopes. The construction process is too complicated and the efficiency is extremely low.

2. Self-drilling anchor bolt support

The self-drilling anchor rod itself is both a drill rod and an anchor rod. After installing the drill bit and connecting it with the grouting machine through the rotary grouting adapter, it can be grouted while drilling to realize the integration of drilling, grouting and anchoring functions. It simplifies the construction process, shortens the construction time, and has a good anchoring effect. It is suitable for soft to medium hard rock formations, especially suitable for soft rock formations, easy to collapse holes and difficult pore formation.

Retaining wall support

1. Gravity retaining wall

Gravity retaining wall uses the gravity of the slope body or the wall itself to resist the side pressure of the slope, and uses concrete, block stone, rubble, etc. as the masonry, or uses concrete to directly pour the slope surface. The material and construction are convenient and the cost is low, but the volume and weight are large, and it is difficult for the weak geology to bear its weight. It is often used in highways, harbors, railways, mines and other projects with small slope heights.

2. Cantilever retaining wall

Cantilever retaining wall, also known as buttress retaining wall, is a kind of reinforced concrete retaining wall, which mainly relies on the weight of the wall and the weight of the fill above the bottom plate to maintain its own balance. The advantages of the cantilever retaining wall are mainly reflected in the small size of the structure, the light weight, and the convenience of being used in the filling area where the stone is lacking and the bearing capacity of the foundation is low, but it costs more steel bars and is less economical.

3. Shotcrete support

When the soil of the slope is loose and slips, the method of shotcrete can be used for protection. It is suitable for rock slopes with poor lithology, low strength, easily weathered or hard rock layers with weathered and broken, joints developed, and the surface layer is weathered and peeled off. Cannot withstand mountain pressure and has limited stability. The bolt support and shotcrete protection can be combined, and the anchoring effect of shotcrete support is better.

4. Plant protection

By planting grass on the slope, laying turf, planting trees and other methods to achieve the effect of strengthening the slope. There are seed sowing method, spray sowing method, hole-pointing method, trenching method, etc., which are suitable for different slope soil quality. It is necessary to consider the soil quality and thickness, and comprehensively consider the local rainfall.

The above is the answer to the question of what are the methods of slope support. Several common slope support methods are listed in detail for everyone. It should be noted that when carrying out slope protection, the protection of the natural environment should be taken into account, so that the slope project has the function of support or protection, and also has good economic, social and ecological benefits.