CN115029976A - Roadbed coverage effect combined prevention and control method based on soil body solidification and partition technology - Google Patents
Roadbed coverage effect combined prevention and control method based on soil body solidification and partition technology Download PDFInfo
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- CN115029976A CN115029976A CN202210672255.7A CN202210672255A CN115029976A CN 115029976 A CN115029976 A CN 115029976A CN 202210672255 A CN202210672255 A CN 202210672255A CN 115029976 A CN115029976 A CN 115029976A
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- 239000002689 soil Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005192 partition Methods 0.000 title claims abstract description 33
- 230000000694 effects Effects 0.000 title claims abstract description 31
- 238000007711 solidification Methods 0.000 title claims abstract description 24
- 230000008023 solidification Effects 0.000 title claims abstract description 24
- 238000005516 engineering process Methods 0.000 title claims abstract description 17
- 230000002265 prevention Effects 0.000 title description 6
- 230000008014 freezing Effects 0.000 claims abstract description 24
- 238000007710 freezing Methods 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000036541 health Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 230000003313 weakening effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002344 surface layer Substances 0.000 description 7
- 239000004746 geotextile Substances 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 229910052799 carbon Inorganic materials 0.000 description 2
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- 238000005054 agglomeration Methods 0.000 description 1
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- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a roadbed coverage effect combined control method based on soil solidification and partition technology, which relates to the technical field of roadbed disease control and comprises the steps of determining the position of a freezing frontal surface of a roadbed soil body; excavating the original roadbed soil body above the freezing frontal surface; laying a waterproof partition layer at the position of the freezing frontal surface; solidifying the excavated original roadbed soil body to obtain a roadbed improved soil body; and backfilling and rolling the roadbed improved soil body. The invention combines the original roadbed soil solidification treatment and soil partition treatment, thereby greatly weakening the influence of the coverage effect.
Description
Technical Field
The invention relates to the technical field of roadbed disease control, in particular to a roadbed coverage effect combined control method based on soil solidification and partition technologies.
Background
The development of the engineering needs to cover the roadbed surface layer partially or in a large area, and because of the waterproof and air-tight characteristics of the covering layer, the moisture in the roadbed cannot be freely evaporated into the air, so that a large amount of moisture is accumulated under the covering layer under the influence of the conditions of external environment, underground water and the like, and certain influence is caused on the safety of the engineering. The covering effect is the phenomenon that the water content of the soil body on the shallow layer of the roadbed is increased and the strength of the soil body is reduced because the water in the roadbed cannot be discharged due to the fact that the roadbed is closed. The coverage effect can lead to the increase of the water content of the soil body under the coverage layer, and then lead to the reduction of the soil body intensity, thereby inducing the uneven settlement of the soil body, even in autumn and winter the road bed soil layer can produce frost heaving under the influence of lower temperature, in spring and summer, the road bed soil body melts under the influence of high temperature and thus produces the slush, and the normal use of cold district road and infrastructure has been seriously influenced.
In the existing measures for preventing and treating the subgrade coverage effect, the subgrade soil body which is easy to form the coverage effect is usually replaced and filled with a soil body with better soil quality, or a layer of plastic film is only paved at the freezing frontal surface of the subgrade soil body to block the upward migration of water in the lower soil body. However, both of the above methods have their own disadvantages: for roadbed soil replacement, a large amount of original soil needs to be excavated, transported and processed, which increases economic cost and simultaneously causes great pressure on environmental protection, and deviates from the development strategy of carbon peak reaching and carbon neutralization actively promoted in China at present; although the disposal scheme for blocking the upward migration of the water in the soil body at the lower part can relieve the diseases generated by the roadbed covering effect to a certain extent, the soil body at the upper part of the freezing frontal surface is still the original roadbed soil body which is easy to form the covering effect, so the treatment method has great limitation on the effect.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a roadbed coverage effect combined prevention and control method based on a soil solidification and partition technology.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a roadbed coverage effect combined prevention and control method based on soil solidification and partition technology comprises,
determining the position of a freezing frontal surface of a roadbed soil body;
excavating the original roadbed soil body above the freezing frontal surface;
laying a waterproof partition layer at the position of the freezing frontal surface;
solidifying the excavated original roadbed soil body to obtain a roadbed improved soil body;
and backfilling and rolling the roadbed improved soil body.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: the determining the position of the freezing frontal surface of the subgrade soil body comprises,
and determining the 0 ℃ freezing line position of the roadbed soil body according to the temperature detection of the roadbed soil and the related hydrogeological conditions.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: the solidifying treatment of the excavated original roadbed soil body comprises the following steps,
mixing the excavated original roadbed soil body with a curing agent and an auxiliary curing agent according to a designed mixing proportion.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: the original roadbed soil body, the curing agent and the auxiliary curing agent are calculated by weight percent: 80-85% of original roadbed soil, 1-8% of curing agent and 7-15% of auxiliary curing agent.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: the curing agent comprises a road fluid.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: the auxiliary curing agent comprises one or more of fly ash, cement and lime.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: the waterproof partition layer comprises a waterproof geomembrane.
As a preferred scheme of the roadbed coverage effect combined control method based on the soil solidification and partition technology, the method comprises the following steps: after the original subgrade soil body after the solidification treatment is backfilled and rolled, the method also comprises the following steps,
and covering the roadbed improved soil body with geotextile and preserving health.
The invention has the beneficial effects that:
the invention combines the original roadbed soil solidification treatment and soil layer partition treatment. The original roadbed soil body solidification treatment is to carry out improvement treatment on the original roadbed soil body which is easy to form the covering effect by using a curing agent and an auxiliary curing agent, so that the compactness of the improved roadbed soil body is higher, the hydrophilic performance of soil particles is poor, the water accumulation amount in the soil body on the top of the roadbed is reduced, the influence on a road surface layer is reduced, and the covering effect is weakened. The soil layer partition treatment is to lay a partition layer at the freezing frontal surface position of the roadbed soil body, namely the 0 ℃ line position of the roadbed soil body, so as to prevent the water in the original soil body at the lower part of the roadbed from migrating upwards and accumulating in the soil layer at the upper part of the roadbed, thereby reducing the influence on the road surface layer and greatly weakening the influence of the coverage effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic flow chart of a roadbed coverage effect combined control method based on soil solidification and partition technology provided by the invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Fig. 1 is a schematic flow chart of a roadbed coverage effect combined control method based on a soil solidification and partition technology according to an embodiment of the present application. The method comprises the following steps of S101-S106, and the specific steps are as follows:
step S101: and determining the freezing frontal surface position of the roadbed soil body.
Specifically, the freezing frontal surface position of the roadbed soil body of the built area, namely the position of a 0 ℃ freezing line of the roadbed soil body, is determined according to the temperature detection of the roadbed soil body and the related hydrogeological conditions.
Step S102: and excavating the original roadbed soil body above the freezing frontal surface for subsequent solidification treatment.
Step S103: and laying a waterproof partition layer at the position of the freezing frontal surface.
Specifically, a waterproof geomembrane is laid at the position, close to the freezing frontal surface, of the roadbed to form a waterproof partition layer. The waterproof partition layer can partition the influence of the moisture migration in the original roadbed soil body below the freezing frontal surface on the upper soil layer. It should be noted that the laying pipe warehouse of the waterproof partition layer is determined according to the laying width of the roadbed.
Step S104: and solidifying the excavated original roadbed soil body to obtain the roadbed improved soil body.
Specifically, mixing the original roadbed soil body excavated on site by using a mobile mixer, and mixing the original roadbed soil body, a curing agent and an auxiliary curing agent strictly according to a design mixing ratio. The curing agent is road liquid, and the auxiliary curing agent comprises one or more of fly ash, cement and lime. The original roadbed soil body, the curing agent and the auxiliary curing agent are calculated by weight percentage as follows: 80-85% of original roadbed soil, 1-8% of curing agent and 7-15% of auxiliary curing agent.
The road fluid permanently solidifies the soil through a high molecular polymer particle technology, permanently changes the hydrophilicity of the soil into hydrophobicity, improves the bearing capacity and stability of a roadbed soil body, and prolongs the service life of the roadbed soil body. The auxiliary curing agent is selected according to the actual condition of a roadbed soil body, and lime is selected as an auxiliary curing component when a shallow roadbed soil layer is prevented and treated; for a roadbed soil body containing acidic and saline-alkali soil, the fly ash is used as an auxiliary curing component; for subgrade soil bodies containing soft soil, cement is used as an auxiliary curing component at the same time.
It should be noted that, during the blending process, the blending of the mixture should be ensured to be uniform and consistent, and no agglomeration phenomenon occurs.
Step S105: and backfilling and rolling the roadbed improved soil body. The backfilling and rolling processes should be performed strictly in compliance with relevant specifications.
Step S106: and covering the roadbed improved soil body with geotextile and preserving health.
Specifically, a certain humidity should be preserved after the roadbed improved soil body is compacted and formed, if no upper layer paving plan exists in a short period, the roadbed improved soil body after rolling is maintained by adopting geotextile, road surface layer paving is carried out after maintenance is completed, and if the surface layer is paved in time, maintenance can be avoided.
The invention combines the original roadbed soil solidification treatment and soil layer partition treatment. The original roadbed soil body solidification treatment is to carry out improvement treatment on the original roadbed soil body which is easy to form the covering effect by using a curing agent and an auxiliary curing agent, so that the compactness of the improved roadbed soil body is higher, the hydrophilic performance of soil particles is poor, the water accumulation amount in the soil body on the top of the roadbed is reduced, the influence on a road surface layer is reduced, and the covering effect is weakened. The soil layer partition treatment is to lay a partition layer at the freezing frontal surface position of the roadbed soil body, namely the 0 ℃ line position of the roadbed soil body, so as to prevent the water in the original soil body at the lower part of the roadbed from migrating upwards and gathering in the soil layer at the upper part of the roadbed, thereby reducing the influence on the road surface layer and weakening the coverage effect. Therefore, the prevention and treatment method is simple and convenient to operate, remarkable in prevention and treatment effect, high in construction speed and low in economic cost.
In addition to the above embodiments, the present invention may have other embodiments; all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.
Claims (8)
1. A roadbed coverage effect combined control method based on soil solidification and partition technology is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
determining the position of a freezing frontal surface of a roadbed soil body;
excavating the original roadbed soil body above the freezing frontal surface;
paving a waterproof partition layer at the position of the freezing frontal surface;
solidifying the excavated original roadbed soil body to obtain a roadbed improved soil body;
and backfilling and rolling the roadbed improved soil body.
2. The method of claim 1, wherein: the determining the position of the freezing frontal surface of the subgrade soil body comprises,
and determining the 0 ℃ freezing line position of the roadbed soil body according to the temperature detection of the roadbed soil and the related hydrogeological conditions.
3. The method of claim 1, wherein: the solidifying treatment of the excavated original roadbed soil body comprises the following steps of,
mixing the excavated original roadbed soil body with a curing agent and an auxiliary curing agent according to a designed mixing proportion.
4. The method of claim 3, wherein: the original roadbed soil body, the curing agent and the auxiliary curing agent are calculated by weight percent: 80-85% of original roadbed soil, 1-8% of curing agent and 7-15% of auxiliary curing agent.
5. The method of claim 3, wherein: the curing agent comprises a road fluid.
6. The method of claim 3, wherein: the auxiliary curing agent comprises one or more of fly ash, cement and lime.
7. The method of claim 1, wherein: the waterproof partition layer comprises a waterproof geomembrane.
8. The method of claim 1, wherein: after the original subgrade soil body after the solidification treatment is backfilled and rolled, the method also comprises the following steps,
and covering the roadbed improved soil body with geotechnical cloth and preserving health.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672255.7A CN115029976A (en) | 2022-06-15 | 2022-06-15 | Roadbed coverage effect combined prevention and control method based on soil body solidification and partition technology |
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| CN202210672255.7A CN115029976A (en) | 2022-06-15 | 2022-06-15 | Roadbed coverage effect combined prevention and control method based on soil body solidification and partition technology |
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|---|---|---|---|---|
| RU2198255C2 (en) * | 2001-01-11 | 2003-02-10 | Сибирский государственный технологический университет | Roadbed building method |
| JP2006037571A (en) * | 2004-07-28 | 2006-02-09 | Shiima Consultant:Kk | Paving structure |
| CN104047210A (en) * | 2014-06-26 | 2014-09-17 | 李社军 | Railway line roadbed |
| CN108049271A (en) * | 2017-12-09 | 2018-05-18 | 温州振东园林工程有限公司 | A kind of construction of soft soil treatment technique |
| CN207582195U (en) * | 2017-12-02 | 2018-07-06 | 哈尔滨工业大学 | A kind of novel damping-antifreeze compound high-speed railway subgrade |
| CN109811748A (en) * | 2019-01-09 | 2019-05-28 | 东南大学 | A kind of express highway roadbed processing method in Frozen Ground Area |
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| CN111501495A (en) * | 2020-05-08 | 2020-08-07 | 上海宝冶市政工程有限公司 | Road construction method |
-
2022
- 2022-06-15 CN CN202210672255.7A patent/CN115029976A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
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| CN207582195U (en) * | 2017-12-02 | 2018-07-06 | 哈尔滨工业大学 | A kind of novel damping-antifreeze compound high-speed railway subgrade |
| CN108049271A (en) * | 2017-12-09 | 2018-05-18 | 温州振东园林工程有限公司 | A kind of construction of soft soil treatment technique |
| CN109811748A (en) * | 2019-01-09 | 2019-05-28 | 东南大学 | A kind of express highway roadbed processing method in Frozen Ground Area |
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