CN112252294A - Seepage-proofing treatment method for different land block heights in saline-alkali land paddy field - Google Patents
Seepage-proofing treatment method for different land block heights in saline-alkali land paddy field Download PDFInfo
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- CN112252294A CN112252294A CN202011335359.6A CN202011335359A CN112252294A CN 112252294 A CN112252294 A CN 112252294A CN 202011335359 A CN202011335359 A CN 202011335359A CN 112252294 A CN112252294 A CN 112252294A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- Soil Sciences (AREA)
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Abstract
The invention relates to an anti-seepage treatment method for different height differences of plots in saline-alkali land paddy fields, wherein an anti-seepage film is arranged on one side with high terrain to prevent a high-elevation plot from crossing water to a low-elevation plot; meanwhile, the laying method can prevent the impermeable membrane from displacing so as to avoid influencing the impermeable effect.
Description
Technical Field
The invention relates to the technical field of saline-alkali soil reformation, in particular to an anti-seepage treatment method for different height differences of land blocks in a saline-alkali soil paddy field.
Background
In the process of improving the saline-alkali soil, due to the fact that the land flatness is different, the height difference between adjacent field blocks is too large, the field blocks with large heights are enabled to flow water to the field blocks with low heights, salt accumulation on the field blocks at the low positions of the terrain is caused to be too much, and crops cannot grow.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an anti-seepage treatment method for saline-alkali land paddy fields with different land height differences, wherein an anti-seepage film is arranged on one side with high terrain to prevent a high-elevation field from seeping into a low-elevation field, and the specific method comprises the following steps:
(1) excavated soil body
Digging soil bodies on the half side of the field road close to the field block with large elevation and the field block with large elevation close to the field road, and sequentially forming a first groove part, a flat ridge part and a second groove part from the field road to the field block with large elevation;
the horizontal height of the flat ridge part is higher than the horizontal height of the groove bottoms of the first groove part and the second groove part; the horizontal height of the groove bottom of the first groove part is higher than that of the second groove part;
the first groove part is positioned below the field pavement;
the flat ridge part is positioned below the field road, one side of the flat ridge part is adjacent to the first groove part, and the other side of the flat ridge part is adjacent to the second groove part;
a slope is arranged between the groove bottom of the first groove part and the adjacent edge of the flat ridge part, and the gradient of the slope is 1:0.33-1: 1; because the excavation depth is deep, the depth of the foundation pit is mostly below the water level, and if the slope is too small, the slope collapse can not be constructed during excavation; and when the gradient is larger than 1:1, the excavation area is increased, and construction and materials are wasted.
A slope is arranged between the groove bottom of the second groove part and the adjacent edge of the flat ridge part, and the gradient of the slope is 1:0.33-1: 1;
the height of the flat ridge part is more than or equal to the height of the production water level of the elevation field block; the production water level refers to the maximum height of the field supplement water surface in the rice planting process, and is usually 20cm, and the water level is usually the water level in the field soaking period and lasts for 7 days.
The depth of the second groove part is lower than 80cm below the underground water line; (ii) a If the excavation depth is too small or is above the water level line, the depth of the water-resisting layer is insufficient, the underground water flows among the fields, and the anti-seepage effect is lost.
The width of the flat ridge part is preferably 50cm-100cm, and the seepage-proofing film at the flat ridge part and the flat ridge part can move to the position below the water level along with backfill construction and foundation settlement and lose the seepage-proofing effect when the width is too small.
The depth of the first groove part is not less than 50 cm. Less than 50cm will result in the friction force of the first groove part and the flat ridge part on the impermeable membrane after backfilling being insufficient to support the downward pulling force of the backfilled soil of the second groove part on the impermeable membrane, and finally the impermeable material will move downwards integrally and lose the impermeable effect.
(2) Paving impermeable membrane
Paving anti-seepage films on the horizontal groove bottom of the first groove part, the flat ridge part, the horizontal groove bottom of the second groove part and slopes on two sides of the flat ridge part; the anti-seepage film is an HDPE anti-seepage film;
the width of the anti-seepage film laid at the bottom of the second groove part is not less than 50 cm; the anti-seepage film plays a role in integrally fixing the feet of the anti-seepage film at the bottom of the second groove part, and the feet are fixed to lose effect along with factors such as construction backfill or foundation settlement, water level rise, foundation disturbance and the like if the width of the part is less than 50cm, so that the anti-seepage film integrally moves upwards.
The width of the anti-seepage film laid at the bottom of the first groove part is not less than 30 cm; the anti-seepage film plays a role in integrally pressing the anti-seepage film at the bottom of the first groove part, construction backfilling or foundation settlement, water level rising, foundation disturbance and other factors are carried out at any time, if the width of the part is less than 30cm, the pressing part loses effect, and the anti-seepage film integrally moves downwards.
When the anti-seepage film is laid, the whole anti-seepage film is vertically laid, namely, the whole anti-seepage film starts from the bottom of the first groove part, passes through the upper slope, the flat ridge part and the lower slope and finally reaches the bottom of the second groove part; the adjacent anti-seepage films are connected by adopting a hot melting welding method;
(3) tamping of plain soil backfill
And (3) backfilling the soil excavated in the step (1) and tamping.
During backfilling, if silt soil, sand powder, impurity soil or humus soil with the organic matter content more than 8 percent dug in site excavation cannot be used as backfilling soil.
On the basis of the scheme, the planting soil needs to be backfilled within 50cm below the field surface of the second groove part; and when the depth of the backfilled soil is more than 50cm, performing layered filling, wherein the thickness of the layered filling is 25cm-30 cm.
On the basis of the scheme, the compaction degree of the backfill soil of the second groove part is not less than 0.92, and the backfill soil of the first groove part is not less than 0.96. The area above the second groove part is a planting area, the requirement on soil compaction degree is low, and therefore the setting is not less than 0.92; more than the first groove part is a field roadbed, so that the roadbed compactness requirement is high, the compactness is not less than 0.96, and the compactness can meet the soil requirements of different functional areas.
The anti-seepage treatment method can effectively prevent the field with large elevation from seeping into the field with low elevation, avoid excessive salt accumulated in the field with low terrain and be beneficial to the growth of crops; meanwhile, the laying method can prevent the impermeable membrane from displacing so as to avoid influencing the impermeable effect.
Description of the drawings:
FIG. 1 is a high and low differential schematic view of adjacent plots before modification;
FIG. 2 is a schematic diagram of soil excavation and HDPE impermeable membrane laying;
fig. 3 is a schematic diagram of backfilling after the impermeable membrane is laid, wherein the oblique line part in the diagram is a backfilled soil body.
Detailed Description
Terms used in the present invention have generally meanings as commonly understood by one of ordinary skill in the art, unless otherwise specified.
The present invention will be described in further detail with reference to the following data in conjunction with specific examples. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
An anti-seepage treatment method for different land block height differences in saline-alkali land paddy fields is characterized in that an anti-seepage film is arranged on one side with high land topography to prevent a high-elevation field block from crossing water with a low-elevation field block, and the specific method comprises the following steps:
(1) excavated soil body
Digging soil bodies on the half side of the field road close to the field block with large elevation and the field block with large elevation close to the field road, and sequentially forming a first groove part 1, a flat ridge part 2 and a second groove part 3 from the field road to the field block with large elevation;
the level of the flat ridge part 2 is higher than the level of the bottoms of the first groove part 1 and the second groove part 3; the horizontal height of the groove bottom of the first groove part 1 is higher than that of the second groove part 3;
the first groove part 1 is positioned below the field pavement;
the flat ridge part 2 is positioned below the field road, one side of the flat ridge part is adjacent to the first groove part 1, and the other side of the flat ridge part is adjacent to the second groove part 3;
a slope is arranged between the groove bottom of the first groove part 1 and the adjacent edge of the flat ridge part 2, and the gradient of the slope is 1:0.33-1: 1;
a slope is arranged between the groove bottom of the second groove part 3 and the adjacent edge of the flat ridge part 2, and the gradient of the slope is 1:0.33-1: 1;
the height of the flat ridge part 2 is more than or equal to the height of the production water level of the elevation field block;
the depth of the second groove part 3 is lower than 80cm below the underground water line;
the width of the ridge part 2 is preferably 50cm-100cm, and the width is too small, so that the parts 4 and 3 move to the position below the production water level along with backfill construction and foundation settlement, and the seepage-proofing effect is lost.
The depth of the first groove portion 1 is not less than 50 cm. Less than 50cm will result in that the friction force of the backfilled first groove part 1 and the ridge part 2 on the impermeable membrane is not enough to support the downward pulling force of the backfilled soil of the second groove part on the impermeable membrane, and finally the impermeable material moves downwards integrally to lose the impermeable effect.
(2) Paving impermeable membrane
Paving anti-seepage films 4 on the horizontal groove bottom of the first groove part 1, the horizontal ridge part 2, the horizontal groove bottom of the second groove part 3 and slopes on two sides of the horizontal ridge part 2; the impermeable membrane 4 is an HDPE impermeable membrane;
the width of the anti-seepage film laid at the bottom of the second groove part is not less than 50 cm;
the width of the anti-seepage film laid at the bottom of the first groove part is not less than 30 cm;
(3) tamping of plain soil backfill
And (3) backfilling the soil excavated in the step (1) and tamping.
During backfilling, if silt soil, sand powder, impurity soil or humus soil with the organic matter content more than 8 percent dug in site excavation cannot be used as backfilling soil.
On the basis of the scheme, the planting soil needs to be backfilled within 50cm below the field surface of the second groove part 3; and when the depth of the backfilled soil is more than 50cm, performing layered filling, wherein the thickness of the layered filling is 25cm-30 cm.
On the basis of the scheme, the backfill compactness of the first groove part 1 is not less than 0.92, and the backfill of the second groove part is not less than 0.96.
Example 2
In the project of improving saline-alkali soil rice in urban and sunny areas of Qingdao city, because the saline-alkali content of the soil in the field is not uniformly distributed, the anti-seepage treatment is carried out on the field with different height differences and heavier saline-alkali content, and the effect of the water quality and the soil of the adjacent field subjected to the anti-seepage treatment in the whole growth period is compared as shown in the following table.
Table of soil salt content and pH variation
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (8)
1. An anti-seepage treatment method for different land block heights in saline-alkali land paddy fields is characterized by comprising the following steps: the method is characterized in that an impermeable film is arranged on one side with high terrain to prevent a field with large elevation from crossing water to a field with low elevation, and the method comprises the following steps:
(1) excavated soil body
Digging soil bodies on the half side of the field road close to the field block with large elevation and the field block with large elevation close to the field road, and sequentially forming a first groove part (1), a flat ridge part (2) and a second groove part (3) from the field road to the field block with large elevation;
the horizontal height of the flat ridge part (2) is higher than the horizontal height of the groove bottoms of the first groove part (1) and the second groove part (3); the horizontal height of the groove bottom of the first groove part (1) is higher than that of the second groove part (3);
the first groove part (1) is positioned below the field pavement;
the flat ridge part (2) is positioned below the field road, one side of the flat ridge part is adjacent to the first groove part (1), and the other side of the flat ridge part is adjacent to the second groove part (3);
a slope is arranged between the groove bottom of the first groove part (1) and the adjacent edge of the flat ridge part (2), and the gradient of the slope is 1:0.33-1: 1;
a slope is arranged between the groove bottom of the second groove part (3) and the adjacent edge of the flat ridge part (2), and the gradient of the slope is 1:0.33-1: 1;
the height of the flat ridge part (2) is more than or equal to the height of the production water level of the elevation field block;
the depth of the second groove part (3) is lower than 80cm below the underground water line;
(2) paving impermeable membrane
Paving anti-seepage films (4) on the horizontal groove bottom of the first groove part (1), the horizontal ridge part (2), the horizontal groove bottom of the second groove part (3) and slopes on two sides of the horizontal ridge part (2); the impermeable membrane (4) is an HDPE impermeable membrane;
(3) tamping of plain soil backfill
Backfilling the soil body excavated in the step (1) and tamping.
2. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: the width of the flat ridge part (2) is 50-100 cm.
3. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: the depth of the first groove part (1) is not less than 50 cm.
4. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: the width of the anti-seepage film (4) laid at the bottom of the second groove part (3) is not less than 50 cm.
5. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: the width of the anti-seepage film (4) laid at the bottom of the first groove part (1) is not less than 30 cm.
6. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: in the step of backfilling and tamping the plain soil, if silt soil, sand powder, impurity soil or humus soil with the organic matter content more than 8 percent dug out in site excavation cannot be used as backfilling soil.
7. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: the planting soil is required to be backfilled within 50cm below the field surface of the second groove part (3); and when the depth of the backfilled soil is more than 50cm, performing layered filling, wherein the thickness of the layered filling is 25cm-30 cm.
8. The method for the impermeable treatment of the difference of the height of the plots in the saline-alkali soil fields according to claim 1, which is characterized in that: the compaction degree of the backfill soil of the first groove part (1) is not less than 0.92, and the backfill soil of the second groove part is not less than 0.96.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011335359.6A CN112252294A (en) | 2020-11-25 | 2020-11-25 | Seepage-proofing treatment method for different land block heights in saline-alkali land paddy field |
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| CN202011335359.6A CN112252294A (en) | 2020-11-25 | 2020-11-25 | Seepage-proofing treatment method for different land block heights in saline-alkali land paddy field |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463657A (en) * | 2007-12-17 | 2009-06-24 | 贵阳铝镁设计研究院 | Manufacturing method of industrial impounding reservoir |
| CN103270930A (en) * | 2013-06-14 | 2013-09-04 | 扬州大学 | Vegetable paddy-upland rotation cultivation device and cultivation method |
| CN206143717U (en) * | 2016-11-02 | 2017-05-03 | 中国电建集团成都勘测设计研究院有限公司 | Residual material soil layer discontinuous segment antiseepage of dam body structure |
| CN106836123A (en) * | 2017-03-28 | 2017-06-13 | 阮文森 | Geomembrane anti-seepage drainage system for newly-built earth dam and for effecting a radical cure disease danger earth dam |
| CN208445984U (en) * | 2018-05-28 | 2019-02-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Earth and rocky ridge seepage-proofing treatment structure |
| CN211406790U (en) * | 2019-11-04 | 2020-09-04 | 王营杰 | Saline-alkali soil radical treatment device by membrane isolation pool method |
-
2020
- 2020-11-25 CN CN202011335359.6A patent/CN112252294A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463657A (en) * | 2007-12-17 | 2009-06-24 | 贵阳铝镁设计研究院 | Manufacturing method of industrial impounding reservoir |
| CN103270930A (en) * | 2013-06-14 | 2013-09-04 | 扬州大学 | Vegetable paddy-upland rotation cultivation device and cultivation method |
| CN206143717U (en) * | 2016-11-02 | 2017-05-03 | 中国电建集团成都勘测设计研究院有限公司 | Residual material soil layer discontinuous segment antiseepage of dam body structure |
| CN106836123A (en) * | 2017-03-28 | 2017-06-13 | 阮文森 | Geomembrane anti-seepage drainage system for newly-built earth dam and for effecting a radical cure disease danger earth dam |
| CN208445984U (en) * | 2018-05-28 | 2019-02-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Earth and rocky ridge seepage-proofing treatment structure |
| CN211406790U (en) * | 2019-11-04 | 2020-09-04 | 王营杰 | Saline-alkali soil radical treatment device by membrane isolation pool method |
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Application publication date: 20210122 |