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Engineering application of geocell

更新时间:2019-05-21 点击数:91

1. Treatment of semi-filled and semi-excavated roadbed

When building embankments on slopes with a natural gradient of 1:5 on the ground, the embankment foundation should dig steps. When the width of the steps is not less than 1M, the joint of the new and old embankment filling slopes should be excavated when the highway is widened by stages. The width of the high-grade highway steps is generally 2M. Geotechnical cells should be laid on the horizontal surface of each step, and the side limit of the geocell itself should be increased. The reinforcement effect can better solve the problem of uneven subsidence.

2. Roadbed in Sandstorm Area

The roadbed in windy sand area should be mainly low embankment, and the filling height is not less than 0.3M. Because of the special requirements of low roadbed and heavy load-bearing in windy sand area, the use of geocell can play a side-limiting role in loose filling, and ensure that the roadbed has high stiffness and strength in a limited height to withstand the load stress of large vehicles.

3. Reinforcement of abutment backfill

Geotechnical compartment can better achieve the purpose of reinforcing abutment back. It can produce enough friction between geocell and filler, effectively reduce the uneven settlement between subgrade and structure, and ultimately effectively alleviate the early impact damage of "abutment jumping" disease on bridge deck.

4. Roadbed in Permafrost Area

In permafrost regions, the filling roadbed should reach the minimum filling height to prevent frost boiling or lowering the upper limit of the frozen layer, resulting in excessive settlement of the embankment. The unique vertical reinforcement effect of geocell and the effective implementation of the overall lateral limit can ensure the minimum filling height in some special areas to the greatest extent, and make the filling have high quality strength and stiffness.

5. Treatment of collapsible loess roadbed

When Expressway and first-class highway pass collapsible loess and loess section with better compressibility, or when the allowable bearing capacity of high embankment is lower than the pressure of vehicle's cooperative load and embankment's dead weight, the subgrade should also be treated according to the bearing capacity requirement, then the advantages of geocell will undoubtedly be revealed.

6. Saline soil and expansive soil

Highway, first-class highway, shoulder and slope constructed with saline soil and expansive soil all adopt reinforcement measures. The reinforcement effect of the elevation of the cell is the best of all reinforcement materials, and it has excellent corrosion resistance and can fully meet the requirements of constructing highway in saline soil and expansive soil.

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