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Soft soil roadbed construction process

A construction technology and technology of soft soil subgrade, which is applied in basic structural engineering, roads, roads, etc., can solve the problems of difficult to control mixing uniformity, poor uniformity of cement slurry, low compressive strength, etc. The effect of caking speed and reducing moisture content

Active Publication Date: 2018-05-04
WENZHOU ZHENDONG LANDSCAPE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Soft soil roadbed construction process
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  • Soft soil roadbed construction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: A kind of soft soil subgrade construction technology, prepares and obtains through following steps:

[0046] S1. Remove sundries and obstacles in the soft soil area, manually remove ground surface water, and level the ground surface;

[0047] S2, dig out the soft soil on the surface of the ground, lay a layer of 20cm gravel, and the particle size of the gravel is 5mm;

[0048] S3, laying a 10cm concrete layer on the surface of the crushed stone layer, the material of the concrete layer is selected from the impermeable concrete in the prior art;

[0049] S4. Add a curing agent to the excavated soft soil and mix evenly, react for 1 hour, the water content of the soft soil before adding the curing agent is 20%, and the weight ratio of the curing agent to the soft soil is 3:100, and the backfill soil is obtained;

[0050] S5, before the concrete is solidified, lay a layer of 20cm backfill soil layer on the concrete layer, use a lime-soil paver to spread, and ...

Embodiment 2-5

[0054] Embodiment 2-5: A soft soil subgrade construction process. The difference from Embodiment 1 is that the components of the curing agent and their corresponding parts by weight are shown in Table 1.

[0055] Each component of curing agent and parts by weight thereof in table 1 embodiment 1-5

[0056] Curing agent component

Embodiment 6

[0057]Embodiment 6: A soft soil subgrade construction process, the difference from Embodiment 1 is that the weight ratio of curing agent to soft soil is 5:100.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E01C3/04
CPCE01C3/04E02D3/12E02D3/123
Inventor 詹振光蔡海雪詹益超林蓓蓓谢盈盈邵利云
Owner WENZHOU ZHENDONG LANDSCAPE ENG CO LTD