A kind of soft soil subgrade construction technology

Abstract

The invention discloses a soft soil roadbed construction process and relates to the technical field of road construction. The soft soil roadbed construction process includes the following steps that S1, sundries and barriers in a soft soil area are clear away, open water on the ground surface is manually removed, and the ground surface is leveled; S2, soft soil on the surface layer of ground is dug out, a rubble layer with the thickness being 20-30 cm is laid, and the particle size of rubble is 5-25 mm; S3, a 10-15 cm concrete layer is laid on the surface of the rubble layer; S4, a solidification agent is added into the dug-out soft soil and uniformly mixing, reactions is performed for 1-3 hours, and then backfilling soil is obtained; S5, before concrete solidification, a 20-30 cm backfilling soil layer is laid on the concrete layer, pavement is performed through a dust paver, and a paved roadbed is subjected to rolling compaction for 6-8 times; and S6, the rolled-compacted roadbed issubjected to curing for 10-15 days, and then construction is finished. According to the soft soil roadbed construction process, construction is easy, the soil solidification speed is high, the soil solidification strength is high, and the compressive strength of the roadbed is improved; and consumption of the solidification agent is low, local materials are used, the construction procedures are reduced, uniform dispersion of the solidification agent is facilitated by means of a penetrating agent, and then the structural strength of the backfilling soil layer is improved.

Description

technical field [0001] The invention relates to the technical field of road construction, more specifically, it relates to a soft soil roadbed construction technology. Background technique [0002] Expressway is a large linear structure, which has strict requirements on post-construction settlement and settlement difference of different road sections. Expressways generally cross different landform units, and will encounter various foundation conditions along the line. Deep soft soil strata are widely developed in the Yangtze River Delta, Pearl River Delta and other coastal areas of my country. Due to the high embankment and heavy load, the reinforcement treatment of these deep soft soil foundations is one of the technical difficulties in the construction of roads or expressways in soft soil areas. In the Chinese invention patent whose publication number is CN107245996A, a kind of soft soil subgrade cement mixing pile construction technology is disclosed, including the follo...

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Problems solved by technology

[0003] The above-mentioned patent uses the drill bit to input cement slurry into the soft soil foundation and stir it, it is difficult to control the uniformity of mixing, and the uniformity of the cement slurry in the soft soil is poor, resulting in low overall compressive strength after the soft soil foundation is cured

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