CN114164722A - Water retention method for sand dune zone subgrade - Google Patents
Water retention method for sand dune zone subgrade Download PDFInfo
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- CN114164722A CN114164722A CN202111366901.9A CN202111366901A CN114164722A CN 114164722 A CN114164722 A CN 114164722A CN 202111366901 A CN202111366901 A CN 202111366901A CN 114164722 A CN114164722 A CN 114164722A
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- Prior art keywords
- cofferdam
- roadbed
- longitudinal slope
- zone
- water
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- 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
Abstract
The invention discloses a sand dune zone roadbed water retention method, and belongs to the technical field of roadbed compaction construction. The sand dune zone roadbed water retention method comprises the following steps: determining parameters of an inner cofferdam of a road section area according to the size of a roadbed longitudinal slope of an actual road on site; according to the determined cofferdam parameters, lofting the surface of the roadbed, and carrying out cofferdam construction on the longitudinal slope of the roadbed; checking the quality of the cofferdam, and performing sprinkling operation to enable water to permeate in the cofferdam; and after the moisture is permeated in the cofferdam, flattening the cofferdam, and performing rolling construction. The sand dune area roadbed water retention method effectively solves the technical problem that the water content of the roadbed at the large scale section of the longitudinal slope of the sand dune area is insufficient, can effectively improve the compaction quality of the roadbed at the section at the large longitudinal slope, can prevent the loss of water, avoids the secondary water supplement and sprinkling, and can save a large amount of water sources for the arid desert area lacking water.
Description
Technical Field
The invention relates to the technical field of roadbed compaction construction, in particular to a sand dune zone roadbed water retention method.
Background
In the construction of dune zone road bed, the road bed shaping back, carry out even watering through the watering lorry on the surface of aeolian sand filler, treat that moisture permeates the road bed completely after, carry out the compaction afterwards, water has certain lubrication action, under the external force compaction effect, can accelerate the displacement of soil granule, rearrange and be close to each other, simultaneously, increase the quantity of solid particle in the unit volume, reduce the void fraction, and then improve the closely knit degree bulk strength of the deep soil body. Therefore, ensuring sufficient water content in roadbed construction is one of important factors for ensuring roadbed compaction quality. However, the process has the following disadvantages: when the longitudinal slope of the roadbed is small, the sprinkling truck can directly sprinkle water on the road surface, and the water penetrates into the roadbed soil body under the action of gravity; however, when the longitudinal slope of the roadbed is large, the water sprayed to the surface tends to flow from the high position to the ground along the longitudinal slope of the roadbed, which directly results in insufficient water content of the roadbed at the top of the slope and excessive water content at the bottom of the slope, thereby causing the reduction of the compaction quality of the roadbed; secondly, to the high slope department that moisture content does not meet the requirements, can mend and spill usually, and in desert area, the water resource is in short supply, and the construction is mended and is spilt and to cause huge pressure for the water source of job site.
Disclosure of Invention
The invention aims to provide a sand dune zone roadbed water retention method, which can effectively solve the problem of ensuring the water content of a roadbed at a large scale section of a longitudinal slope in a sand dune zone and can effectively improve the compaction quality of the roadbed at a section with a large longitudinal slope.
The invention solves the problems and adopts the technical scheme that:
the invention provides a sand dune zone roadbed water retention method, which comprises the following steps:
s1, determining parameters of an inner cofferdam of a road section area according to the size of a roadbed longitudinal slope of an actual road on site;
s2, lofting the surface of the roadbed according to the determined cofferdam parameters, and performing cofferdam construction on the longitudinal slope of the roadbed;
s3, checking the quality of the cofferdam, performing watering operation, and allowing water to permeate in the cofferdam;
and S4, after the moisture is permeated in the cofferdam, flattening the cofferdam, and performing rolling construction.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
the invention provides a water retention method for a roadbed in a dune area, which can effectively solve the technical problem of insufficient water content of the roadbed in a large scale section of a longitudinal slope in the dune area and ensure the water content of the roadbed in the large scale section of the longitudinal slope; secondly, the compaction quality of the roadbed at the section with a larger longitudinal slope can be effectively improved by improving the roadbed construction process of the sand dune zone, thirdly, water can seep along the gradient of the roadbed in the roadbed construction, the loss of water is prevented, the secondary supplement and sprinkling of water are avoided, and a large amount of water sources can be saved for arid and water-deficient desert areas.
Preferably, the further technical scheme of the invention is as follows:
the cofferdam parameters in the step S1 include the height of the cofferdam, the size of the cofferdam, the position distribution of the cofferdam and the number of the cofferdams.
The S1 specifically includes the following steps:
s11, for a road section with a larger longitudinal slope of the roadbed, the height of the determined cofferdam is higher as much as possible, and the size of the determined cofferdam is smaller as much as possible.
S12, for the road section with the smaller longitudinal slope of the roadbed, the height of the determined cofferdam is reduced as much as possible, and the size of the set cofferdam is a little larger.
The cofferdam is formed by enclosing square sandy soil, and a plurality of cofferdams are uniformly distributed on the longitudinal slope of the roadbed.
The S2 includes the steps of:
s21, determining the height of cofferdams, the size of the cofferdams, the position distribution of the cofferdams and the number of the cofferdams, and lofting on the surface of the roadbed;
s22, carrying out cofferdam construction on the longitudinal slope of the roadbed by using a special tool;
s23, reserving wheel tracks at two sides of the longitudinal slope of the roadbed for the watering cart to pass through.
The S3 specifically includes the following steps:
s31, after the cofferdam construction is finished, checking whether gaps exist in key areas of the cofferdam, and ensuring that the quality of the cofferdam is qualified;
and S32, after the quality inspection of the cofferdam is qualified, the watering operation of the watering cart is started, and the moisture in the cofferdam uniformly permeates into the roadbed.
Drawings
FIG. 1 is a schematic diagram of the distribution of cofferdams at the larger longitudinal slopes of the roadbed;
FIG. 2 is a schematic structural view of a cofferdam at a larger part of a longitudinal slope of the roadbed;
FIG. 3 is a schematic diagram of the distribution of cofferdams at the smaller longitudinal slopes of the roadbed according to the invention;
fig. 4 is a schematic structural view of a cofferdam at a smaller longitudinal slope of the roadbed.
Labeled as: 101, cofferdams at sections with larger longitudinal slopes of the roadbed; 102. a roadbed at a section with a large longitudinal slope; 201. cofferdams at the sections with smaller longitudinal slopes of the roadbed; 202. and the roadbed at the road section with the smaller longitudinal slope.
Detailed Description
The invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
A sand dune zone roadbed water retention method comprises the following steps:
s1, determining parameters of an inner cofferdam of a road section area according to the size of a roadbed longitudinal slope of an actual road on site;
the cofferdam parameters comprise the height of the cofferdam, the size of the cofferdam, the position distribution of the cofferdam and the number of the cofferdams.
FIG. 1 is a schematic diagram showing the distribution of cofferdams at large longitudinal slopes of the roadbed; FIG. 2 is a schematic structural diagram of a cofferdam at a larger longitudinal slope of the roadbed; FIG. 3 is a schematic diagram showing the distribution of cofferdams at smaller longitudinal slopes of the roadbed according to the invention; fig. 4 shows a structural schematic diagram of a cofferdam at a smaller longitudinal slope of the roadbed.
And determining the height of the cofferdam of the road section according to the size of the longitudinal slope of the roadbed, wherein the height of the cofferdam is not too high or too low.
S1 specifically includes the following steps:
s11, for a road section with a larger longitudinal slope of the roadbed, the height of the determined cofferdam is higher as much as possible, and the size of the determined cofferdam is smaller as much as possible. In a specific embodiment, the cofferdam 101 is formed by enclosing square sand and soil, as shown in fig. 2, and 18 cofferdams are uniformly arranged on a section of the roadbed 102 with a larger longitudinal slope, as shown in fig. 1.
S12, for the road section with the smaller longitudinal slope of the roadbed, the height of the determined cofferdam is reduced as much as possible, and the size of the set cofferdam is slightly larger so as to increase the uniform permeation degree and the uniform permeation roadbed area. In a specific embodiment, the cofferdam 201 is formed by enclosing square sand, as shown in fig. 4, and 32 cofferdams are uniformly arranged on a section of the roadbed 202 with a smaller longitudinal slope, as shown in fig. 3.
S2, lofting the surface of the roadbed according to the determined cofferdam parameters, and performing cofferdam construction on the longitudinal slope of the roadbed;
s2 specifically includes the following steps:
s21, determining the height of cofferdams, the size of the cofferdams, the position distribution of the cofferdams and the number of the cofferdams, and lofting on the surface of the roadbed;
s22, carrying out cofferdam construction on the longitudinal slope of the roadbed by using a special tool;
s23, when constructing the cofferdam, reserving wheel tracks at two sides of the longitudinal slope of the roadbed for the sprinkler to pass through.
S3, checking the quality of the cofferdam, performing watering operation, and allowing water to permeate in the cofferdam;
s3 specifically includes the following steps:
s31, after the cofferdam construction is finished, checking whether gaps exist in key areas of the cofferdam, and ensuring that the quality of the cofferdam is qualified;
s32, after the quality inspection of the cofferdam is qualified, the watering operation of the watering cart is started, the water entering the cofferdam is blocked by the soil body of the cofferdam, the water in the cofferdam uniformly permeates into the roadbed, the problem that the water permeates into the roadbed along the slope in a longitudinal slope zone can be solved, and the effect of preventing the water loss is achieved.
And S4, after the moisture permeates into the cofferdam, flattening the cofferdam by using tools such as a bulldozer and the like, and then starting rolling construction.
The invention provides a water retention method for a roadbed in a dune area, which can effectively solve the technical problem of insufficient water content of the roadbed in a large scale section of a longitudinal slope in the dune area and ensure the water content of the roadbed in the large scale section of the longitudinal slope; secondly, the compaction quality of the roadbed at the section with a larger longitudinal slope can be effectively improved by improving the roadbed construction process of the sand dune zone, thirdly, water can seep along the gradient of the roadbed in the roadbed construction, the loss of water is prevented, the secondary supplement and sprinkling of water are avoided, and a large amount of water sources can be saved for arid and water-deficient desert areas.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (6)
1. A sand dune zone roadbed water retention method is characterized by comprising the following steps:
s1, determining parameters of an inner cofferdam of a road section area according to the size of a roadbed longitudinal slope of an actual road on site;
s2, lofting the surface of the roadbed according to the determined cofferdam parameters, and performing cofferdam construction on the longitudinal slope of the roadbed;
s3, checking the quality of the cofferdam, performing watering operation, and allowing water to permeate in the cofferdam;
and S4, after the moisture is permeated in the cofferdam, flattening the cofferdam, and performing rolling construction.
2. The dune zone subgrade water retention method according to claim 1, wherein the cofferdam parameters in S1 include the height of cofferdam, the size of cofferdam, the position distribution of cofferdam and the number of cofferdams.
3. The sand dune zone subgrade water retention method according to claim 2, wherein said S1 specifically comprises the following steps:
s11, for a road section with a larger longitudinal slope of the roadbed, the height of the determined cofferdam is higher as much as possible, and the size of the determined cofferdam is smaller as much as possible.
S12, for the road section with the smaller longitudinal slope of the roadbed, the height of the determined cofferdam is reduced as much as possible, and the size of the set cofferdam is a little larger.
4. The sand dune zone subgrade water retention method according to claim 3, characterized in that said cofferdam is surrounded by square sand and soil, and a plurality of said cofferdams are uniformly arranged on the longitudinal slope of the subgrade.
5. The sand dune zone subgrade water retention method according to claim 4, wherein said S2 includes the following steps:
s21, determining the height of cofferdams, the size of the cofferdams, the position distribution of the cofferdams and the number of the cofferdams, and lofting on the surface of the roadbed;
s22, carrying out cofferdam construction on the longitudinal slope of the roadbed by using a special tool;
s23, reserving wheel tracks at two sides of the longitudinal slope of the roadbed for the watering cart to pass through.
6. The sand dune zone subgrade water retention method according to claim 1, wherein said S3 specifically comprises the following steps:
s31, after the cofferdam construction is finished, checking whether gaps exist in key areas of the cofferdam, and ensuring that the quality of the cofferdam is qualified;
and S32, after the quality inspection of the cofferdam is qualified, the watering operation of the watering cart is started, and the moisture in the cofferdam uniformly permeates into the roadbed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366901.9A CN114164722A (en) | 2021-11-18 | 2021-11-18 | Water retention method for sand dune zone subgrade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366901.9A CN114164722A (en) | 2021-11-18 | 2021-11-18 | Water retention method for sand dune zone subgrade |
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| CN114164722A true CN114164722A (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111366901.9A Withdrawn CN114164722A (en) | 2021-11-18 | 2021-11-18 | Water retention method for sand dune zone subgrade |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608419A (en) * | 2009-07-21 | 2009-12-23 | 中铁二十一局集团有限公司 | Desert area migratory dune land railway bed construction method |
| CN105178125A (en) * | 2015-10-15 | 2015-12-23 | 中交第一公路工程局有限公司 | Lake region high filling road base sand blowing embankment construction method and embankment structure |
| CN205062597U (en) * | 2015-10-15 | 2016-03-02 | 中交第一公路工程局有限公司 | Road bed embankment structure of blowing sand is filled out to lake region height |
| CN107012755A (en) * | 2017-04-19 | 2017-08-04 | 中铁七局集团第四工程有限公司 | Aeolian sand subgrade construction method |
| CN107587414A (en) * | 2017-08-18 | 2018-01-16 | 国网上海市电力公司 | A kind of wind-blown sand fill subgrade construction method |
-
2021
- 2021-11-18 CN CN202111366901.9A patent/CN114164722A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608419A (en) * | 2009-07-21 | 2009-12-23 | 中铁二十一局集团有限公司 | Desert area migratory dune land railway bed construction method |
| CN105178125A (en) * | 2015-10-15 | 2015-12-23 | 中交第一公路工程局有限公司 | Lake region high filling road base sand blowing embankment construction method and embankment structure |
| CN205062597U (en) * | 2015-10-15 | 2016-03-02 | 中交第一公路工程局有限公司 | Road bed embankment structure of blowing sand is filled out to lake region height |
| CN107012755A (en) * | 2017-04-19 | 2017-08-04 | 中铁七局集团第四工程有限公司 | Aeolian sand subgrade construction method |
| CN107587414A (en) * | 2017-08-18 | 2018-01-16 | 国网上海市电力公司 | A kind of wind-blown sand fill subgrade construction method |
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Application publication date: 20220311 |
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