Underground pipe water drainage and alkali reduction system for saline-alkali land garden green land and use method of underground pipe water drainage and alkali reduction system

Abstract

The invention discloses a concealed pipe drainage and alkali reduction system for a saline-alkali land garden green land and a use method thereof, and relates to the technical field of garden transformation. Comprising a drainage pipe network and a drainage inspection well, the drainage pipe network comprises a water suction pipe and a water collection pipe which are made of polyethylene double-wall corrugated pipes, the water suction pipe can be wrapped by a filter layer, and the drainage inspection well is of a waterproof circular prefabricated concrete assembly type structure. The underground water level can be effectively controlled, soil salinization is reduced, a good growth environment is created for plants, the survival rate of the plants is increased, and meanwhile the maintenance cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of landscape renovation technology, and in particular to a subsurface drainage and descaling system for saline-alkali land gardens and its application method. Background Technology

[0002] In the saline-alkali areas of Northwest China, especially in landscaping construction with high groundwater levels and adverse geological conditions such as albic soil, soil salinization and waterlogging can lead to weak plant growth or even death, severely impacting the overall aesthetic appeal. Existing renovation measures lack specific solutions for complex geological issues such as high water levels and high salinity. Furthermore, incomplete drainage and saline-alkali accumulation result in plants dying every year despite planting. Traditional drainage systems suffer from problems such as easy leakage, high maintenance costs, and poor adaptability to specific environments, failing to achieve long-term, economical, and ecological comprehensive management. Therefore, a targeted technical solution to address these issues is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a submerged drainage desalination system for saline-alkali landscaping and green spaces that can effectively control water levels and reduce salinity, as well as its usage method.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A subsurface drainage and desalization system for saline-alkali land gardens includes a drainage network, which includes several suction pipes laid underground in the target area. The suction pipes are perforated polyethylene double-wall corrugated pipes. The drainage network also includes a collection pipe connected to the first end of the suction pipes. The collection pipe is a polyethylene pipe with a larger diameter than the suction pipes.

[0006] It also includes drainage inspection wells, with the water collection pipe connected in series through these wells to the final drainage inspection well; the drainage inspection wells are waterproof, circular, precast concrete assembly structures; each drainage inspection well is equipped with a sedimentation zone and a forced drainage device; the water suction pipe is surrounded by a filter layer.

[0007] Preferably, the drainage inspection well includes a concrete well base, a well cylinder, and a well ring and a well cover arranged from bottom to top; the inner wall of the well cylinder is provided with steps, and the top of the well is provided with a tapering section.

[0008] Preferably, the closing section is a structure constructed using a brick vaulting method.

[0009] Preferably, the depth of the sedimentation area at the bottom of the drainage inspection well is 300mm to 500mm, and the forced drainage device is a submersible sewage pump installed inside the well.

[0010] Preferably, the diameter of the water suction pipe is De110, the laying slope is 7‰ with a spacing of 10 meters, and the burial depth is 500mm to 1430mm.

[0011] Preferably, the diameter of the water collection pipe is De200 or De250, the laying slope is 1%, and the burial depth is 1070mm to 1480mm.

[0012] Preferably, the filter layer comprises a polyester nonwoven fabric wrapping the tube body and graded filter media filling the outside, the filter media layer having a thickness of 250 mm and a curvature coefficient of 1-3.

[0013] A method for using a submerged drainage and desalization system for saline-alkali land gardens includes the following steps:

[0014] S1. First, conduct geological exploration to measure the groundwater level and soil salinity distribution in the target area, and identify heavily treated areas with high water levels and high salinity.

[0015] S2. Based on the survey results of S1, densely lay water intake pipes and water collection pipes in the heavily treated area. The burial depth and slope of the pipes are designed according to the measured water level.

[0016] S3. Connect the laid pipes to the drainage inspection well to form a drainage network.

[0017] Beneficial effects

[0018] This invention lowers the water level and salinity by laying underground pipes, which can solve the problems of excessively high groundwater levels and salinity, as well as the problems of saline-alkali land and alkaline soil affecting plant growth. It can significantly improve the survival rate of plants, reduce maintenance costs in terms of labor and materials, and gradually improve the landscape effect and ecological function of gardens and green spaces.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the drainage inspection well structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the measured water level in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the distribution of the white clay zone in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the planar distribution of soil salinity sampling points according to an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the concealed pipe arrangement of the present invention;

[0025] In the diagram: 1-Drainage inspection well; 2-Well base; 3-Well ring; 4-Well cover; 5-Well shaft; 6-Steps; 7-Closing section; 8-Brick vault. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1 A subsurface drainage and desalization system for saline-alkali landscaping includes a drainage network comprising several suction pipes laid underground in the target area. The suction pipes are perforated double-walled corrugated polyethylene pipes, primarily serving as preliminary filters and collecting soil moisture within the area. The moisture is then discharged through the suction pipes into a collection pipe.

[0031] The drainage network also includes a collection pipe, which is connected to the first end of the suction pipe. It uses a polyethylene pipe with a larger diameter than the suction pipe to collect water flow. It mainly serves to connect the drainage pipelines in series and collect and drain water.

[0032] It also includes a drainage inspection well 1. Each water collection pipe is connected in series through the drainage inspection well 1 and then connected to the end drainage inspection well 1, which directly discharges into the landscape water system in the park. The drainage inspection well 1 is a waterproof circular precast concrete assembly structure. The drainage inspection well 1 is equipped with a sedimentation area and a strong drainage device.

[0033] The water suction pipe is covered with a filter layer.

[0034] Specifically, the drainage inspection well 1 includes a concrete well base 2, a well cylinder 5, and a well ring 3 and a well cover 4 arranged from bottom to top; the well base 2 is paved with C15 concrete; the well ring 3 is paved with C30 concrete; the inner wall of the well cylinder 5 is provided with steps 6, and the top of it is provided with a closing section 7.

[0035] Specifically, the closing section 7 is a structure constructed using the brick vault method, with a vault height of 125mm.

[0036] Specifically, the sedimentation area at the bottom of drainage inspection well 1 is 300mm to 500mm deep, and the forced drainage device is a 100QW110-10-5.5 submersible sewage pump installed in the well, which can directly discharge the water in the collection pipe to the nearest municipal rainwater pipe.

[0037] Specifically, the diameter of the water suction pipe is De110, the spacing is 10 meters, the slope is 7‰, and the burial depth is 500mm to 1430mm.

[0038] Specifically, the diameter of the water collection pipe is De200 or De250, the laying slope is 1%, and the burial depth is 1070mm to 1480mm.

[0039] Specifically, the filter layer consists of a polyester nonwoven fabric wrapped around the tube and graded filter media filling it. The filter media layer is 250mm thick and has a curvature coefficient of 1-3. Natural sand and gravel must be mechanically screened before use.

[0040] A method for using a submerged drainage and desalization system for saline-alkali land gardens includes the following steps:

[0041] S1. First, conduct geological exploration to measure the groundwater level and soil salinity distribution in the target area, and identify heavily treated areas with high water levels and high salinity.

[0042] S2. Based on the survey results of S1, densely lay water intake pipes and water collection pipes in the heavily treated area. The burial depth and slope of the pipes are designed according to the measured water level.

[0043] S3. Connect the laid pipes to the drainage inspection well 1 to form a drainage pipe network.

[0044] Specifically, in step S1, the distribution location of the white soil zone is also surveyed; in step S2, the laying path of the water suction pipe is preferentially arranged to pass through or along the white soil zone.

[0045] This embodiment uses the drainage, alkali reduction, and greening improvement project of Huian Park in Huinong District, Shizuishan City, Ningxia as the specific implementation scenario.

[0046] The park covers a total area of ​​approximately 250,000 square meters. Since its construction in 2006, due to the influence of different geological conditions such as high groundwater levels, severely saline-alkali soil, and a north-south running belt of albic soil, the soil salinization level is high, which seriously affects the growth of landscape plants. According to the analysis of the data from the monitoring points, the salinization level in the area is unevenly distributed, resulting in a large number of plant deaths every year, with an average annual plant mortality rate as high as 20%-35%. There is a situation where replanting is done every year, but the plants still die every year. Dead trees, trees with unbalanced crowns, and trees with weak crowns are common in the park, and the landscape effect and ecological function are seriously degraded.

[0047] Firstly, a geological survey was conducted. The survey data shows that the water level is high in some areas of the park, as shown in Table 1 below:

[0048]

[0049] The soil salinity test results are shown in Table 2 below:

[0050]

[0051] Table 2 shows the soil salinity and electrical conductivity of this park.

[0052]

[0053] Based on Table 3, this park has moderate to severe saline soil. The presence of albic soil also hinders root development and the exchange of nutrients and water, making the soil neither drought-resistant nor flood-resistant.

[0054] This embodiment first involves laying an underground drainage network beneath the park. The suction pipes are perforated polyethylene double-wall corrugated pipes with a diameter of De110, laid at a slope of 7‰ and a depth of 500 mm to 1430 mm, specifically for collecting soil moisture in this area. The suction pipes are wrapped with a layer of polyester non-woven fabric, and then backfilled with a 250 mm thick layer of gravel filter media with a curvature coefficient of 1-3. Subsequently, water from each pipe is collected in one location via a larger diameter collection pipe with a 1% slope.

[0055] Then, a drainage inspection well 1 is installed. The drainage inspection well 1 is a circular precast concrete assembly structure, which includes, from bottom to top, a concrete well base 2, a precast well cylinder 5, and a well ring 3 and a well cover 4 on top. The bottom of the drainage inspection well 1 is equipped with a sedimentation area of ​​300 to 500 mm, and there is also a 100QW110-10-5.5 type submersible sewage pump forced drainage device.

[0056] In summary

[0057] By using the system and method of this invention, geological problems in parks can be solved. After the project is completed, the groundwater level can be effectively controlled, soil salinization can be reduced, a good growth environment for plants can be created, the survival rate of plants can be improved, and the annual labor and material costs incurred due to maintenance can be reduced.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A concealed pipe drainage and desalization system for saline-alkali land gardens, characterized in that, The system includes a drainage network, which includes several suction pipes laid underground in the target area. The suction pipes are perforated polyethylene double-wall corrugated pipes. The drainage network also includes a collection pipe connected to the beginning of the suction pipes. The collection pipe is a polyethylene pipe with a larger diameter than the suction pipes. It also includes drainage inspection wells, and the water collection pipe is connected to the end drainage inspection well after being connected in series through the drainage inspection wells; the drainage inspection wells are waterproof circular precast concrete assembled structures; the drainage inspection wells are equipped with a sedimentation area and a strong drainage device; the water suction pipe is covered with a filter layer.

2. A concealed drainage and desalination system for saline-alkali land gardens as described in claim 1, characterized in that, The drainage inspection well includes a concrete well base, a well cylinder, and a well ring and a well cover arranged from bottom to top; the inner wall of the well cylinder is provided with steps, and the top is provided with a tapering section.

3. A subsurface drainage and desalization system for saline-alkali land gardens as described in claim 2, characterized in that, The closing section is a structure constructed using the brick vaulting method.

4. A subsurface drainage and desalination system for saline-alkali land gardens as described in claim 1, characterized in that, The depth of the sedimentation area at the bottom of the drainage inspection well is 300mm to 500mm, and the forced drainage device is a submersible sewage pump installed inside the well.

5. A concealed drainage and desalization system for saline-alkali land gardens as described in claim 1, characterized in that, The water suction pipe has a diameter of De110, is laid at 10-meter intervals with a slope of 7‰, and has a burial depth of 500mm to 1430mm.

6. A concealed pipe drainage and desalization system for saline-alkali land gardens as described in claim 1, characterized in that, The diameter of the water collection pipe is De200 or De250, the laying slope is 1%, and the burial depth is 1070mm to 1480mm.

7. A subsurface drainage and desalination system for saline-alkali land gardens as described in claim 1, characterized in that, The filter layer comprises a polyester nonwoven fabric wrapping the tube body and graded filter media filling the outside. The filter media layer has a thickness of 250 mm and a curvature coefficient of 1-3.

8. A method for using a concealed pipe drainage and desalization system for saline-alkali land gardens, characterized in that, Includes the following steps: S1. First, conduct geological exploration to measure the groundwater level and soil salinity distribution in the target area, and identify heavily treated areas with high water levels and high salinity. S2. Based on the survey results of S1, densely lay water intake pipes and water collection pipes in the heavily treated area. The burial depth and slope of the pipes are designed according to the measured water level. S3. Connect the laid pipes to the drainage inspection well to form a drainage network.

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