A Method for Preventing Erosion and Loss of Subgrade Slope Surface Soil

Abstract

The invention discloses a method for preventing a roadbed side slope surface soil mass from scouring loss. The method comprises the following steps of A, measuring the performance of the roadbed side slope surface soil mass, i.e. measuring the physical and mechanical properties of the roadbed side slope surface soil mass; B, casting to manufacture right-angled hexahedral hollow building blocks, i.e. determining the size of the right-angled hexahedral hollow building blocks, wherein the left inner angle and the right inner angle are 90 degrees, the other four inner angles are 135 degrees, the lengths l of the ridges on the two sides are equal to 10 to 24cm, the lengths l minute of the upper ridge and the lower ridge are equal to [1.2 1], the wall thickness b is equal to 0.251, the height h is obtained by performing mechanical analysis calculation on side slope angle, soil mass mechanical performance and the like, and performing die making, casting and maintenance formation according to the determined size of the right-angled hexahedral hollow building blocks; C, paving the right-angled hexahedral hollow building blocks, i.e. flattening and compacting a slope surface, paving from top to bottom, making sure that the 90-degree inner angles of the right-angled hexahedral hollow building blocks are positioned on the left side and the right side, and after paving is finished, filling soil and tamping. According to the method, the roadbed side slope surface soil mass can be better prevented from being lost by flushing during raining, and the stability of the whole roadbed side slope is guaranteed; waste of a building block material can also be prevented, and the material cost is reduced.

Description

technical field [0001] The invention relates to a method for preventing the scouring and loss of surface soil of roadbed side slopes, and belongs to the field of roadbed side slope slope surface protection engineering. Background technique [0002] The seepage effect caused by rainfall is one of the main factors that reduce the stability of the subgrade slope soil. Under the condition of continuous rainfall or heavy rainfall, the subgrade slope is often washed away by rainwater and the protective structure fails due to improper protection. The stability and water flow directly erode the subgrade fill, seriously affecting the stability of the subgrade slope. Hollow blocks are widely used in roadbed slope protection projects of railways and highways because of their simple structure and convenient laying to prevent the surface soil of the roadbed slope from being eroded and lost under the action of rainfall, thereby ensuring the stability of the entire roadbed slope. In actua...

AI Technical Summary

Problems solved by technology

However, the side length, wall thickness, and height of the regular hexagonal hollow blocks are determined based on experience, without considering the physical and mechanical properties of the soil inside the block, the slope gradient, and the seepage caused by rainfall on the stability of the soil inside the block. Impact

When the properties of the soil in the block are poor or the slope is steep and the height of the block is insufficient, the soil in the block will be eroded and damaged by the seepage of rainwater, which will lead to the hollowing out of the bottom of the block and the partial collapse of the protective structure. Meet the stability requirements of the soil in the block and the shallow layer of the embankment slope

Similarly, for the case where the soil quality in the hexagonal hollow block is good or the slope is relatively gentle and the block height is too large, it will increase the material cost of the construction block and cause unnecessary waste

Moreover, the planar shape of the regular hexagonal hollow block is a regular hexagon close to a circle. Under the same hydraulic slope condition, the seepage path of rainwater in the block is longer, and its seepage erosion effect is stronger, and the protective effect of the block is relatively strong. poor

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