Weak expansive soil roadbed construction process

A construction process and weak expansion technology, which is applied in the field of weak expansion soil subgrade construction technology to achieve the effect of reducing the possibility of separation

Inactive Publication Date: 2021-03-09
LANHAI CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: the underlying layer may be a weak expansive soil layer, and the above-mentioned construction technology is inconvenient to deal with the weak expansive soil layer

Method used

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  • Weak expansive soil roadbed construction process
  • Weak expansive soil roadbed construction process
  • Weak expansive soil roadbed construction process

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Embodiment Construction

[0038] The following is attached Figure 1-5 The application is described in further detail.

[0039] The embodiment of the present application discloses a weak expansive soil embankment construction process, including the following steps: S1, processing the weak expansive soil layer: first draw two road lines, and then excavate the weak expansive soil between the two road lines with an excavator to the mixing bin 1, then add lime or cement into the mixing bin 1, then use the stirring device 3 to mix the weak expansive soil and lime evenly, and then discharge the mixture of weak expansive soil and lime to the two road lines , then level and roll the mixture of weak expansive soil and lime;

[0040] S2, paving and leveling plain soil on the upper surface of the weak expansive soil layer;

[0041] S3, draw a neat standard area grid on the lower bearing layer of step 2, and manually spread the cement evenly in each grid by the amount of cement per square meter;

[0042] S4, ca...

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Abstract

The invention relates to a weak expansive soil roadbed construction process. The construction process comprises the following steps: S1, treating a weak expansive soil layer, namely drawing two road lines, digging weak expansive soil between the two road lines into a mixing bin, adding lime into the mixing bin, and uniformly mixing the weak expansive soil with the lime through a stirring device, then discharging the mixture of the weak expansive soil and the lime to the position between the two road lines, and then leveling and rolling the mixture of the weak expansive soil and the lime; S2, carrying out plain soil paving and leveling on the upper surface of the weak expansion soil layer; S3, drawing a neat square grid with a standard area on the lower bearing layer in step 2, and manuallyand uniformly spreading cement in each square grid according to the cement mixing amount per square meter; S4, using a road mixer to mix the plain soil and cement; and S5, leveling and rolling the plain soil cement mixture. The weak expansive soil layer can be conveniently treated.

Description

technical field [0001] The present application relates to the technical field of roadbed construction, in particular to a construction technology of weakly expansive soil roadbed. Background technique [0002] At present, expansive soil is also called "expansive soil", which belongs to cohesive soil. Because the soil contains more clay minerals such as montmorillonite and illite, it is very hydrophilic, and has the characteristics of violent volume expansion after soaking in water and significant volume shrinkage after dehydration. When the natural moisture content is high, the expansion amount and expansion force after immersion in water are small, while the shrinkage amount and shrinkage force after dehydration are large; when the natural pore ratio is larger, the expansion amount and expansion force are smaller, and the shrinkage is smaller. The volume and contraction force are larger. This kind of soil will cause serious damage to road subgrades, but in its natural sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04E01C19/48B28C3/00
CPCE01C3/04E01C19/4866B28C3/00E01C2301/02
Inventor 姜安张艳慧卞井贵
Owner LANHAI CONSTR GRP CO LTD
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