A kind of foam lightweight soil roadbed filling material and processing method

Abstract

The invention discloses a foam light soil subgrade filling material, which comprises the following components and weight: each cubic meter of foam light soil contains: 174-475 kg of ordinary Portland cement, 116-190 kg of stone powder, and fly ash 116-190 kg, sludge ash 116-190 kg, mineral powder 116-190 kg, gypsum 116-190 kg, water 87-285 kg, water reducing agent 0.87-2.85 kg, concrete reinforcing agent 0.87-1.43 kg, enhanced type 0.87-2.85 kg of water reducing agent, 0.3-1.2 kg of cement foaming agent, and 0.15-0.95 kg of fiber.

Description

technical field [0001] The invention belongs to the field of roadbed construction, and in particular relates to a foam light soil roadbed filling material and a processing method. Background technique [0002] In traditional subgrade construction, especially at the abutment back of the road-bridge junction, the soft connection under the lap slab between the main bridge and the approach bridge, soil with low compression ratio (such as graded gravel, pond slag, lime soil, etc.) For filling. During construction, every 20-1250px of soil needs to be rolled and compacted. After the compactness meets the design requirements, the next layer of filling, rolling and compacting will be carried out. After the filling reaches the design level, it will take a long time. The pavement structure layer can only be laid in the post-settlement period (a few months, half a year or more than a year). Due to the long post-construction settlement period, this conflicts with the timeliness and eco...

AI Technical Summary

Problems solved by technology

In transition sections such as the back of the abutment, after the pavement structural layer is laid and put into use, uneven settlement is likely to occur due to excessive filler load, rainwater infiltration, and insufficient bearing capacity of the foundation, resulting in vehicle jumping

The traditional treatment method is to increase the bearing capacity of the foundation, but this treatment method is not only difficult to solve the problem fundamentally, but also has problems such as long construction period and low economic efficiency.

At the same time, it is difficult to backfill and compact with traditional materials due to the narrow space on the outside of the basement, on both sides of the tunnel, and at places where pipelines are densely packed.

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