Construction method of soft soil roadbed

A construction method and technology of soft soil subgrade, applied to roads, roads, building components, etc., to reduce settlement, improve stability, and achieve good results

Active Publication Date: 2019-08-06
福建星原建设工程发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the moisture-proof effect, improves the stability of the soft soil roadbed, and enhances the supporting force of the soft soil roadbed, but there is still a certain room for improvement

Method used

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  • Construction method of soft soil roadbed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A construction method for a soft soil subgrade, comprising the steps of:

[0045] (1) Ground garbage cleaning, cleaning thickness 15cm, leveling the ground to form a roadbed;

[0046] (2) Set-out positioning, press-fitting, and pile fixing of prestressed pipe piles;

[0047] (3) Excavate the roadbed to the target depth of 10cm, backfill with fly ash, and roll compactly;

[0048] (4) Pave a mixture of crushed stone and slag, the particle size of the crushed stone is 5mm, the particle size of the slag is 3mm, the mass ratio of the crushed stone and the slag is 3:1, and the paving thickness is 8cm;

[0049] (5) Pouring modified asphalt, pouring in 2 times, each pouring 4cm;

[0050] (6) Roadbed compaction, use a road roller to roll both sides of the roadbed first, then roll the middle of the roadbed, the rolling overlap distance is 35cm, use small gravel to fill the gaps in the roadbed, the degree of compaction and flatness of the roadbed is 85%;

[0051](7) Drainage pr...

Embodiment 2

[0056] A construction method for a soft soil subgrade, comprising the steps of:

[0057] (1) Ground garbage cleaning, cleaning thickness 35cm, leveling the ground, forming a roadbed;

[0058] (2) Set-out positioning, press-fitting, and pile fixing of prestressed pipe piles;

[0059] (3) Excavate the roadbed to the target depth of 15cm, backfill with rocky soil and sandy soil, the mass ratio of rocky soil to sandy soil is 1:2, and roll compactly;

[0060] (4) Pave a mixture of gravel, slag and lime soil, the mass ratio of the three is 2:1:1, the particle size of the gravel is 15mm, the particle size of the slag is 3mm, the particle size of lime soil is 10mm, and the paving thickness is 12cm ;

[0061] (5) Pouring modified asphalt, pouring in 3 times, each pouring 5cm;

[0062] (6) Roadbed compaction, use a road roller to roll both sides of the roadbed first, then roll the middle of the roadbed, the rolling overlap distance is 50cm, use stone chips to fill the gaps in the roa...

Embodiment 3

[0068] A construction method for a soft soil subgrade, comprising the steps of:

[0069] (1) Ground garbage cleaning, cleaning thickness 25cm, leveling the ground, forming roadbed;

[0070] (2) Set-out positioning, press-fitting, and pile fixing of prestressed pipe piles;

[0071] (3) Excavate the roadbed to the target depth of 12cm, backfill with rocky soil and sandy soil, the mass ratio of rocky soil to sandy soil is 2:1, and roll compactly;

[0072] (4) Pave a mixture of gravel, slag and lime soil, the mass ratio of the three is 3:2:1, the particle size of the gravel is 10mm, the particle size of the slag is 6mm, the particle size of lime soil is 8mm, and the paving thickness is 10cm ;

[0073] (5) Pouring modified asphalt, pouring in 3 times, each pouring 4cm;

[0074] (6) Roadbed compaction, use a road roller to roll both sides of the roadbed first, then roll the middle of the roadbed, the rolling overlap distance is 40cm, use stone chips to fill the gaps in the roadbe...

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Abstract

The invention relates to the field of road construction, in particular to a construction method of a soft soil roadbed. The construction method of the soft soil roadbed comprises the following steps of (1) clearing ground garbage, leveling the ground, and forming the roadbed; (2) line discharging positioning, press fitting and pile fixing of a prestressed pipe pile; (3) excavating the roadbed to atarget depth, carrying out backfilling by using a filler, and rolling and compacting; (4) paving a sand cushion layer; (5) pouring an asphalt layer; (6) compacting the roadbed: rolling two sides of the roadbed by using a road roller, and then rolling the middle position of the roadbed; and (7) drainage protection treatment: excavating drainage grooves in two sides of the roadbed. The soft soil roadbed construction method has the advantages of being good in stability, capable of reducing settling volume, high in strength and good in drainage effects.

Description

technical field [0001] The invention relates to the field of road construction, in particular to a construction method for a soft soil roadbed. Background technique [0002] Soft soil roadbed refers to a common special area roadbed, which requires special design and treatment, and is mostly distributed in rivers, rivers, ocean coasts, inland lakes, ponds, basins and rainy mountain depressions. Soft soil has the characteristics of high water content, poor permeability, low natural strength and high compressibility; if the critical height is exceeded, the foundation will lose stability. The cause of soft soil is generally believed to be the sediment formed by surface water in the late Quaternary period, which is mostly distributed in low-lying areas such as seashores, lakesides, and river banks, where the surface is wet or waterlogged all year round. Therefore, there are often a large number of water-loving plants on the surface. Due to the growth and death of these plants, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/02E01C3/06C08L95/00C08L9/08
CPCC08L95/00E01C3/02E01C3/06C08L9/08Y02A30/60
Inventor 江闽洋董振东祝军
Owner 福建星原建设工程发展有限公司
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