Weather-resistant hydrogel roadbed operation period water content and dense state regulation and control method

A hydrogel roadbed, hydrogel technology, applied in roads, roads, infrastructure engineering and other directions, can solve problems such as inconvenient automatic moisture regulation of roadbed, improve bearing capacity and slope stability, reduce damage, reduce water effect of stress

Active Publication Date: 2022-02-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of existing roadbeds that are not convenient for automatic regulation when there is too much water or too little water, and propose a method for regulating the moisture content and compactness of the roadbed based on weather-resistant hydrogel during the operation period

Method used

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  • Weather-resistant hydrogel roadbed operation period water content and dense state regulation and control method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1 , based on the weather-resistant hydrogel roadbed moisture content and compact state control method during the operation period, including the following steps:

[0037] S1: Foundation cleaning and compaction;

[0038] S2: Preparation of hydrogel roadbed raw materials. The hydrogel roadbed raw materials include the following percentages by weight: 0.3% hydrogel (20% ultrafine bentonite, 0.02% sodium hydroxide solution, 0.2% acrylic acid solution, 0.2% initiator, N, N methylene bisacrylamide 0.2%, hydroxyethyl methacrylate 5%), surfactant 0.2% and the rest required construction materials:

[0039] S3: laying the prepared hydrogel roadbed raw material on the surface of the foundation to form the first layer of improved roadbed;

[0040] S4: lay plain soil roadbed on the surface of the improved roadbed, and carry out mechanical compaction;

[0041] S5: Lay a layer of hydrogel roadbed raw material on the surface of plain soil roadbed to form a second lay...

Embodiment 2

[0057] refer to figure 1 , based on the weather-resistant hydrogel roadbed moisture content and compact state control method during the operation period, including the following steps:

[0058] S1: Foundation cleaning and compaction;

[0059] S2: Preparation of hydrogel roadbed raw materials. The hydrogel roadbed raw materials include the following percentages by weight: 0.4% hydrogel (21% superfine bentonite, 0.03% sodium hydroxide solution, 0.22% acrylic acid solution, 0.22% initiator, N, N methylenebisacrylamide 0.22%, hydroxyethyl methacrylate 6%), surfactant 0.3% and the rest required construction materials:

[0060] S3: laying the prepared hydrogel roadbed raw material on the surface of the foundation to form the first layer of improved roadbed;

[0061] S4: lay plain soil roadbed on the surface of the improved roadbed, and carry out mechanical compaction;

[0062] S5: Lay a layer of hydrogel roadbed raw material on the surface of plain soil roadbed to form a second l...

Embodiment 3

[0078] refer to figure 1 , based on the weather-resistant hydrogel roadbed moisture content and compact state control method during the operation period, including the following steps:

[0079] S1: Foundation cleaning and compaction;

[0080] S2: Preparation of hydrogel roadbed raw materials. The hydrogel roadbed raw materials include the following percentages by weight: 0.5% hydrogel (23% ultrafine bentonite, 0.04% sodium hydroxide solution, 0.3% acrylic acid solution, 0.3% initiator, N, N methylenebisacrylamide 0.3%, hydroxyethyl methacrylate 7%), surfactant 0.23% and the rest required construction materials:

[0081] S3: laying the prepared hydrogel roadbed raw material on the surface of the foundation to form the first layer of improved roadbed;

[0082] S4: lay plain soil roadbed on the surface of the improved roadbed, and carry out mechanical compaction;

[0083] S5: Lay a layer of hydrogel roadbed raw material on the surface of plain soil roadbed to form a second lay...

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Abstract

The invention belongs to the technical field of weather-resistant hydrogel roadbeds, particularly relates to a weather-resistant hydrogel roadbed operation period water content and dense state regulation and control method, and provides the following scheme aiming at the problem that an existing roadbed is inconvenient to automatically regulate and control when the water content is too much or too little: the method comprises the following steps: S1, cleaning and compacting the surface of a foundation; S2, preparing a hydrogel roadbed filler; S3, laying the prepared hydrogel roadbed raw material on the surface of the foundation to form a first layer of improved roadbed; and S4, laying a plurality of layers of plain soil roadbed on the surface of the improved roadbed. The water absorption and release functions of the modified resin and the characteristics of the gel state are combined for mixed use, the roadbed is laid and improved in a layered mode, when the water content in the roadbed is increased to a certain threshold value, the modified resin can absorb water and is slightly swelled, a strength and compactness protection layer can be formed on the connection section of the foundation and the roadbed and the connection section of the roadbed and the pavement, and the pot cover effect is prevented.

Description

technical field [0001] The invention relates to the technical field of weather-resistant hydrogel roadbed, in particular to a method for controlling the water content and compact state of the weather-resistant hydrogel roadbed during the operation period. Background technique [0002] During the construction period of the subgrade project, there are specific design requirements for the optimal moisture content, but after a certain period of time after completion and use, the internal moisture content of the subgrade is lower than the original design after many years of pot cover effect, freeze-thaw cycle, rainfall infiltration, groundwater level changes and other factors. The requirements have been greatly improved, which directly softens the subgrade and reduces the compactness and service strength of the subgrade, resulting in a large number of road diseases, prone to catastrophic engineering accidents and high maintenance costs. [0003] The existing subgrade is not conve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04E02D3/00C08F220/20C08F220/06C08F222/38
CPCE01C3/04E02D3/00C08F220/20C08F220/06C08F222/385Y02A30/60
Inventor 崔新壮张小宁杜业峰姜鹏包振昊郝建文牟启硕张圣琦李向阳路雨孙玉杰王帅孙华琛
Owner SHANDONG UNIV
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