Construction technology for reducing post-construction settlement of collapsible loess

Abstract

The invention discloses a construction technology for reducing post-construction settlement of collapsible loess. The construction technology comprises the steps that after a roadbed is backfilled toa certain height, a first layer ramming surface of a high-speed hydraulic rammer is reinforced by the high-speed hydraulic rammer, when the backfill thickness reaches a second layer ramming surface ofthe high-speed hydraulic rammer, and the high-speed hydraulic rammer is used for reinforcing again; spacing and first time ramming points of the first layer ramming surface of the high-speed hydraulic rammer are arranged according to tamping points, and then the high-speed hydraulic rammer is used for ramming and reinforcing according to the arranged ramming points; and after the first time ramming is finished, the ramming surface is flattened and rolled, after rolling is completed, spacing and second time ramming points are arranged according to the ramming points, then the high-speed hydraulic rammer is used for ramming and reinforcing according to the arranged ramming points, after the second time ramming is overall completed, the second time ramming points are flattened and rolled, and backfilling is resumed after completion of construction. The construction technology adopts the high-speed hydraulic rammer to reinforce backfilling soil, and the effect is remarkable.

Description

technical field [0001] The invention relates to a construction method for collapsible loess treatment, in particular to a construction technique for reducing post-construction settlement of collapsible loess. Background technique [0002] Collapsible loess refers to the soil that undergoes significant additional deformation due to the structural damage of the soil after flooding under the action of the self-weight stress of the overlying soil layer, or under the joint action of the self-weight stress and additional stress, and belongs to special soil. The soil is relatively uniform, loose in structure and well-developed in pores. When not wetted by water, it generally has higher strength and less compressibility. When soaked by water under a certain pressure, the soil structure will be destroyed rapidly, resulting in a large additional subsidence, and the strength will decrease rapidly. The northwestern region is all collapsible loess. In the process of backfilling with th...

AI Technical Summary

Problems solved by technology

When soaked by water under a certain pressure, the soil structure will be destroyed rapidly, resulting in a large additional subsidence, and the strength will decrease rapidly

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