CN219660337U - Foundation section structure based on concealed pipe improved mucilage saline-alkali soil - Google Patents
Foundation section structure based on concealed pipe improved mucilage saline-alkali soil Download PDFInfo
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- CN219660337U CN219660337U CN202223428288.1U CN202223428288U CN219660337U CN 219660337 U CN219660337 U CN 219660337U CN 202223428288 U CN202223428288 U CN 202223428288U CN 219660337 U CN219660337 U CN 219660337U
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- saline
- pipe
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- alkali soil
- clay
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- 239000002689 soil Substances 0.000 title claims abstract description 64
- 239000003513 alkali Substances 0.000 title claims abstract description 43
- 229920000715 Mucilage Polymers 0.000 title description 4
- 239000000853 adhesive Substances 0.000 title description 4
- 239000004927 clay Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims description 12
- 210000003608 fece Anatomy 0.000 claims description 8
- 241001494479 Pecora Species 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims 2
- 238000009933 burial Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 11
- 230000035699 permeability Effects 0.000 abstract description 9
- 150000003839 salts Chemical class 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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Abstract
The utility model discloses a foundation section structure of improved clay saline-alkali soil based on an concealed pipe, wherein the saline-alkali soil sequentially comprises a cultivation layer, a permeable layer and a clay layer from top to bottom, a plurality of grooves are excavated on the saline-alkali soil at intervals, and the depth of each groove is below the clay layer; a buried pipe is paved at the bottom of the groove, a water filtering hole is formed in the buried pipe, and the buried pipe is communicated with the water collecting pipe; the periphery of the concealed pipe is filled with a filter material layer which is not higher than the clay layer; a filler layer is paved above the filter material layer, and fills the residual space of the groove. The clay saline-alkali soil can effectively solve the problems of poor permeability, unsmooth drainage and short duration of improvement effect of clay saline-alkali soil under the condition of utilizing the existing agricultural machinery and cultivation habit. By innovating the improvement method of the clay saline-alkali soil, the improvement cost is effectively reduced, and the stability and durability of the improvement effect are improved.
Description
Technical Field
The utility model belongs to the technical field of saline-alkali soil treatment, and relates to a basic section structure of improved mucilaginous saline-alkali soil based on a concealed pipe.
Background
The saline-alkali soil in northwest areas is widely distributed, has complex causes and various types, and concentrates nearly half of saline-alkali soil in China. Due to the high salinization degree, large-area land resources are idle. Improving saline-alkali soil in northwest inland arid regions is an important way to promote sustainable development and protect vulnerable ecosystems in northwest regions.
Saline-alkali soil in northwest areas is mainly distributed in areas with alluvial plain and low topography. Due to the influence of soil forming factors and agricultural cultivation, in areas with clay layers with hard textures and poor permeability in soil sections, due to shallower groundwater level and difficult drainage, moderately severe saline-alkali soil is wide in distribution area, and soil salinity cannot be discharged, so that crops are difficult to emerge and grow. The existing saline-alkali soil improvement method mainly comprises physical, chemical, hydraulic engineering, agricultural measures and biological improvement, but the purposes, measures and effects of different improvement methods are different.
At present, methods for improving a water-impermeable soil layer with poor permeability mainly comprise deep ploughing, deep scarification, sand doping and other methods, mechanical ditching and the like. The method has a certain effect on improving the clay saline-alkali soil, but the adoption of deep ploughing, deep scarification and other technologies requires additional funds to purchase special machinery, and the consumption of a large amount of fuel, sand doping and other measures are limited by sand sources, transportation and the like, and especially the existing improvement technology is not only high in cost or short in duration of the improvement effect, but also the problems of poor permeability of the clay layer and unsmooth water and salt discharge are not fundamentally solved, so that the method is not beneficial to large-scale reconstruction of the clay saline-alkali soil. Therefore, by innovating the improvement method of the clay saline-alkali soil, the improvement cost is effectively reduced, and the stability and the durability of the improvement effect are improved, so that the improvement method of the clay saline-alkali soil has become an important point and a difficult point of the improvement work of the clay saline-alkali soil.
Disclosure of Invention
The utility model aims to provide a basic section structure of improved clay saline-alkali soil based on a concealed pipe, which solves the problem of poor permeability of a clay layer in the prior art.
The technical scheme adopted by the utility model is that the foundation section structure of the clay saline-alkali soil is improved based on a concealed pipe, the saline-alkali soil sequentially comprises a cultivation layer, a permeable layer and a clay layer from top to bottom, a plurality of grooves are excavated on the saline-alkali soil at intervals, and the depth of each groove is below the clay layer; a buried pipe is paved at the bottom of the groove, a water filtering hole is formed in the buried pipe, and the buried pipe is communicated with the water collecting pipe; the periphery of the concealed pipe is filled with a filter material layer which is not higher than the clay layer; a filler layer is paved above the filter material layer, and fills the residual space of the groove.
The utility model is also characterized in that:
the thickness of the plough layer is not more than 25cm.
The filter material layer comprises fine sand and broken stone.
The thickness of the filter material layer is not less than 20cm.
When the filling layer is a trench, the soil of the cultivated layer collected in advance is mixed with coarse sand, straw powder and cow dung or sheep dung, and the filled soil volume weight is close to the soil volume weight before trench excavation.
The mixing ratio of the plough layer soil to coarse sand, straw powder and cow dung or sheep dung is 3:3:2:2.
The hidden pipes are uniformly arranged.
The hidden pipe is a PVC or PE pipe, the inner diameter is 5-30cm, the embedded depth is 60-140cm, and the cross section is circular.
The buried depth of the buried pipe is 60-140cm, and the buried distance of the buried pipe is 10-50m.
The longitudinal slope of the concealed pipe is reduced to 0.3-0.4%.
The cultivation and planting directions of the cultivation layer are consistent with the buried direction of the concealed pipe.
The utility model is based on the foundation section structure of the improved clay saline-alkali soil by the concealed pipe, and can effectively solve the problems of poor permeability of the clay layer, unsmooth drainage and short duration of the improvement effect of the clay saline-alkali soil under the condition of utilizing the existing agricultural machinery and cultivation habit. By innovating the improvement method of the clay saline-alkali soil, the improvement cost is effectively reduced, and the stability and durability of the improvement effect are improved.
Drawings
FIG. 1 is a schematic diagram of the basic cross-sectional structure of the present utility model based on a blind pipe modified clay saline-alkali soil;
FIG. 2 is a graph showing the planting effect of the basic cross-sectional structure of the improved clay saline-alkali soil based on the concealed pipe.
In the figure, a cultivation layer 1, a water permeable layer 2, a clay layer 3, a concealed pipe 4, a filter material layer 5, a filler layer 6 and crops 7.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
As shown in figure 1, the utility model is based on the basic section structure of the concealed pipe modified mucilage salt-alkali soil, and the salt-alkali soil sequentially comprises a cultivation layer 1, a permeable layer 2 and a clay layer 3 from top to bottom, and also comprises a concealed pipe 4, a filter material layer 5 and a filler layer 6.
The thickness of the cultivation layer 1 is not more than 25cm, and a traditional cultivation mode is adopted.
The clay layer 3 is located above the blind pipe 4 and the filter layer 5.
The buried pipe 4 is a PVC or PE pipe with a water filtering hole which is manually or mechanically excavated in the field, the inner diameter is 5-30cm, the buried depth is 60-140cm, and the cross section is circular. The filter material layer 5 is paved at the bottom and around the hidden pipe 4, the longitudinal slope drop of the hidden pipe 4 with the water filtering holes is generally 0.3-0.4% when the hidden pipe is paved, and the top and the bottom of the hidden pipe 4 are ensured to be at least 12cm away from the top and the bottom of the filter material layer 5 when the filter material layer 5 is buried; the embedding distance of the concealed pipe 4 is generally 10-50m.
When the packing layer 6 is used for digging grooves in the field, the soil of the cultivation layer collected in advance is mixed with coarse sand, straw powder and cow dung or sheep dung, the mixing ratio is 3:3:2:2, and the volume weight of the packed soil is the same as the volume weight of the soil before the grooves are dug.
A filter material layer 5 composed of fine sand, broken stone and the like is paved at the bottom and around the concealed pipe 4, and functions to allow soil moisture, salt and the like to enter the concealed pipe 4, but prevent sediment and the like from entering the concealed pipe 4 along with water.
As shown in fig. 2, the cultivation and planting direction of the crops 7 on the cultivation layer 1 are kept identical with the burying direction of the concealed pipe 4.
The concrete implementation mode of the basic section structure of the improved mucilage saline-alkali soil based on the concealed pipe is as follows:
step 1, digging grooves in the field manually or mechanically, digging out and collecting soil of the cultivated layer 1, and continuously digging the soil below the clay layer 2, wherein the digging depth of the grooves is set to be 60-140cm according to the depth of the clay layer 2 and the change of the groundwater level.
Step 2, firstly paving a filter material layer 5 at the bottom of the groove, wherein the thickness of the filter material layer is not less than 10cm; laying a buried pipe 4, wherein the longitudinal slope of the buried pipe 4 is reduced to 0.4%, and the bottom of the buried pipe 4 is connected with a water collecting pipe; after the concealed pipe 4 is installed and buried, the filter material layer 5 is continuously backfilled.
And 3, filling the filler layer 6 in the groove in a layered manner, wherein the layered filling height is not higher than 15cm, and the filling soil volume weight is the same as the soil volume weight before the groove is excavated.
And 4, keeping the cultivation and planting directions of the cultivation layer 1 consistent with the embedding direction of the concealed pipe 4.
The filler layer 6 has larger pores, is favorable for infiltration of water, dissolved salt and the like of the clay layer 3 and an upper layer of the clay layer, enters the concealed pipe 4 through the filter layer 5 and then is discharged out of the soil body, thereby fundamentally solving the problems of increasing the permeability of the clay layer 3 and unsmooth water and salt discharge.
Aiming at the problems that the technology of deep ploughing, deep scarification and the like is adopted to improve the viscous saline-alkali soil, additional funds are needed to purchase special machinery, a large amount of fuel is needed to be consumed, measures such as sand mixing and the like are limited by sand sources, transportation and the like, and the cost is too high; the improvement effect duration is too short, and the problem that the permeability of the impervious soil layer is poor, the salt is not smoothly discharged is not fundamentally solved, under the condition of utilizing the existing agricultural machinery and cultivation habit, the concealed pipe 4 is buried under the clay layer 3 in a mode of digging a groove and burying the concealed pipe 4 in the field, the permeability of the clay layer 3 is effectively improved through the filler layer 6, the filter material layer 5 and the concealed pipe 4, the salt discharging and discharging process is promoted, and the method has the characteristics of simplicity and convenience in operation, low improvement cost, long duration of improvement effect and the like.
Claims (9)
1. The method is characterized in that a plurality of grooves are excavated at intervals on the saline-alkali soil, and the depth of the grooves is below the clay layer (3); a concealed pipe (4) is laid at the bottom of the groove, a water filtering hole is formed in the concealed pipe (4), and the concealed pipe (4) is communicated with a water collecting pipe; the periphery of the concealed pipe (4) is filled with a filter material layer (5), and the filter material layer (5) is not higher than the clay layer (3); a packing layer (6) is paved above the filter material layer (5), and the packing layer (6) fills the residual space of the groove.
2. The basic cross-sectional structure of a pipe-based modified viscose saline-alkali soil according to claim 1, characterized in that the thickness of the plough layer (1) is not more than 25cm.
3. A basic cross-sectional structure based on a pipe-in-pipe modified viscose saline-alkali soil according to claim 1, characterized in that the filter layer (5) comprises fine sand and crushed stone.
4. The basic cross-sectional structure of an improved viscosity saline-alkali soil based on a concealed pipe according to claim 1, wherein the thickness of the filter material layer (5) is not less than 20cm.
5. The underground pipe-based improved clay saline-alkali soil foundation section structure according to claim 1, wherein when the filler layer (6) is a trench, the soil of the cultivated layer collected in advance is mixed with coarse sand, straw powder and cow dung or sheep dung, and the filled soil has the same volume weight as the soil before trench excavation.
6. The basic cross-sectional structure of an improved viscous saline-alkali soil based on a concealed pipe according to claim 1, wherein the concealed pipes (4) are uniformly arranged.
7. The foundation section structure based on the improved viscous saline-alkali soil of the concealed pipe according to claim 1, wherein the concealed pipe (4) is a PVC or PE pipe, the inner diameter of the concealed pipe (4) is 5-30cm, the burial depth of the concealed pipe (4) is 60-140cm, and the cross section of the concealed pipe (4) is circular.
8. The foundation section structure based on the improved viscous saline-alkali soil of the concealed pipe according to claim 1, wherein the burying depth of the concealed pipe (4) is 60-140cm, and the burying interval of the concealed pipe (4) is 10-50m.
9. The basic cross-sectional structure of an improved viscosity saline-alkali soil based on a concealed pipe according to claim 1, wherein the longitudinal slope of the concealed pipe (4) is reduced by 0.3-0.4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223428288.1U CN219660337U (en) | 2022-12-19 | 2022-12-19 | Foundation section structure based on concealed pipe improved mucilage saline-alkali soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223428288.1U CN219660337U (en) | 2022-12-19 | 2022-12-19 | Foundation section structure based on concealed pipe improved mucilage saline-alkali soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219660337U true CN219660337U (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223428288.1U Active CN219660337U (en) | 2022-12-19 | 2022-12-19 | Foundation section structure based on concealed pipe improved mucilage saline-alkali soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219660337U (en) |
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2022
- 2022-12-19 CN CN202223428288.1U patent/CN219660337U/en active Active
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