CN211621501U

CN211621501U - Saline-alkali region water resource collecting and utilizing system with overflow pipe

Info

Publication number: CN211621501U
Application number: CN201920592660.1U
Authority: CN
Inventors: 周国华; 王志刚; 李忠锋; 张勇; 任娜; 卢立波; 刘玮; 马莎莎
Original assignee: Tianjin Shengtaicheng Municipal Landscape Co ltd
Current assignee: Tianjin Shengtaicheng Municipal Landscape Co ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-10-02
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a saline-alkali region water resource collecting and utilizing system with an overflow pipe, which comprises a soil body and a storage and discharge well; the soil body comprises a planting soil layer, a permeable film layer, a water storage layer, a waterproof layer and a saline-alkali soil layer which are sequentially arranged from top to bottom; the lower surface of the water storage layer is provided with a groove protruding into the saline-alkali soil layer, and a concealed pipe is arranged in the groove; the underground pipe is connected and communicated with the storage and discharge well in a slope direction; the storage and drainage wells are arranged in the soil body at intervals, the depth of the storage and drainage wells extends to the lower part of the groove from top to bottom, the well wall of the part of the storage and drainage wells, which is in contact with the aquifer, is of a seepage pipe structure, the well wall of the other part of the storage and drainage wells is of a watertight structure, and overflow drainage pipes are arranged on the storage and drainage well wall and are horizontally arranged at the depth of 20-50cm in the planting soil layer; adopting a lateral waterproof layer at the joint of the system and the surrounding building or structure for reverse wrapping; the utility model discloses can effectively collect and permeate the intraformational rainwater of planting soil after the rainfall to can not lead to saline and alkaline soil layer to return salt to planting soil layer.

Description

Saline-alkali region water resource collecting and utilizing system with overflow pipe

Technical Field

The utility model belongs to saline and alkaline land water resource processing field especially relates to a salt and alkali region water resource collection utilizes system containing overflow pipe.

Background

The water resource occupation of the per capita in China is only 30% of the world level, most regions are lack of water or severely lack of water, and in recent years, along with the further deepening of the urbanization process, the demand of the water resource is more and more large, and how to efficiently develop and utilize the water resource becomes a common challenge facing the social needs.

In order to explore the construction paths of sponge cities under different natural environments and urban forms, the country develops two sets of 30 sponge city pilot constructions, the sponge city construction is actively developed nationwide at present, and different rainwater collection, purification and utilization technologies and products are adopted for different underlying surfaces. Rainwater is a precious fresh water resource, and is particularly precious for collecting and utilizing rainwater in coastal saline-alkali soil which is a serious water shortage area. Due to water shortage of saline-alkali soil, the salt concentration in the soil exceeds the bearing capacity of plants, and salt damage is formed. The salt comes with the water and goes with the water, so sufficient fresh water resource supply must be ensured, and the saline-alkali land resource can be continuously utilized.

The total area of coastal saline-alkali soil in China reaches 500 × 10⁴hm²,. With the development of economy and industry in the years, saline-alkali areas become new sites for economic development, and in order to meet the requirements of construction and development, the method for treating saline-alkali soil by 'stone chip leaching layers' and 'concealed pipe salt discharge' is widely applied. The method for treating the saline-alkali soil by the 'stone chip sprinkling layer' and the 'concealed pipe salt elimination' comprises the steps of changing the soil of the saline-alkali soil into good or replacing the soil with planting soil, laying stone chips below the planting soil to isolate the saline-alkali soil, preventing capillary water with high salt from entering the good soil, arranging a drainage blind ditch below the stone chip layer, and timely draining capillary high salt water and water drained from the good soil into a municipal pipe network. Meanwhile, in order to prevent the water level of underground water from exceeding the drenching layer to cause the failure of the drenching layer, the elevation of the green land is raised by earthwork, the elevation is generally raised by at least more than 1.5 meters higher than the highest value of the underground water level, the further distance from the underground high-salinity water is realized, the influence of the high-salinity capillary water is reduced, the improved soil is ensured not to be salinized any more, the greening can be normally carried out, and various plants are planted. However, the existing method for treating saline-alkali soil by adding 'hidden pipe salt removal' to the 'stone chip leaching layer' has the defects that: rainwater after rainfall permeates into soil, enters a salt-alkali layer through a stone chip layer to be lost, or is directly discharged into a municipal drainage pipe network, so that the rainwater cannot be effectively utilized, and meanwhile, in the fertilization process, a large amount of nutrient substances such as nitrogen, phosphorus, potassium and the like are discharged into a municipal rainwater system, and eutrophication of a downstream water body is also caused; the surface runoff rainwater which cannot seep in time when raining flows into low-lying areas such as peripheral roads, the drainage pressure and waterlogging risk of the roads are increased, and meanwhile, the green soil scours the road surface along with the runoff, so that the problem of runoff pollution such as mud left after the road rains is caused; the greening earthwork amount is large and uneconomical.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a saline and alkaline region water resource collection utilizes system that contains the overflow pipe. The system can effectively collect rainwater permeating into the planting soil layer after rainfall, and can not cause salt return of a saline-alkali soil layer to the planting soil layer; furthermore, the utility model discloses can also make saline and alkaline land afforestation elevation reduce, reduce the earthwork volume, reduce the runoff pollution to peripheral facilities such as road simultaneously.

For solving the first technical problem, the utility model adopts the following technical scheme:

a saline-alkali region water resource collecting and utilizing system with an overflow pipe comprises a soil body and a storage and drainage well; the soil body comprises a planting soil layer, a permeable film layer, a water storage layer, a waterproof layer and a saline-alkali soil layer which are sequentially arranged from top to bottom; the lower surface of the water storage layer is provided with a groove protruding into the saline-alkali soil layer, and a concealed pipe is arranged in the groove; the underground pipe is connected and communicated with the storage and discharge well in a slope direction; the storage and drainage wells are arranged in the soil body at intervals, the depth of the storage and drainage wells extends to the lower part of the groove from top to bottom, the well wall of the part of the storage and drainage wells, which is in contact with the aquifer, is of a seepage pipe structure, the well wall of the other part of the storage and drainage wells is of a watertight structure, and overflow drainage pipes are arranged on the storage and drainage well wall and are horizontally arranged at the depth of 20-50cm in the planting soil layer; the joint of the system and the surrounding building or structure adopts a lateral waterproof layer to reversely wrap.

Preferably, the thickness of the planting soil layer is 60-140 cm.

Preferably, the water permeable film layer is a water permeable nonwoven fabric.

Preferably, the aquifer is large-pore material such as 18-60cm thick stone chips or broken stones or pp modules.

Preferably, the waterproof layer comprises an upper waterproof geotextile layer, a waterproof membrane layer and a lower waterproof geotextile layer, and extends to the bottom of the well at the overflow drainage well.

Preferably, the concealed pipes are arranged at intervals of 6-8 meters; the concealed pipe is a PVC (polyvinyl chloride) seepage pipe, 2% of the concealed pipe is communicated with the storage and discharge well in the slope direction, and the concealed pipe can be coated with permeable geotextile.

Preferably, an overflow drain pipe is arranged on the storage and drainage well wall and is flush with the lower surface of the planting soil layer; the bottom of the storage and drainage well is provided with a water taking pit, and a water taking pipe is arranged at the wellhead of the storage and drainage well and extends into the water taking pit.

Preferably, when the area of the green land is very large, the saline-alkali region water resource collection and utilization system with the overflow pipe can be divided into a plurality of catchment areas for convenience of management and control, and different catchment areas can be separated by reverse wrapping with waterproof geotextile; the height of the turn-up is typically more than 50cm above the aquifer.

Any range recited in the present invention includes any numerical value between the endpoints and any sub-range comprised of any numerical value between the endpoints or any numerical value between the endpoints.

Unless otherwise specified, the raw materials of the present invention can be purchased commercially, and the equipment used in the present invention can be implemented by conventional equipment in the related art or by referring to the prior art in the related art.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model relates to a saline-alkali soil region water resource collecting and utilizing system containing an overflow pipe, which can effectively collect rainwater permeating into a planting soil layer after rainfall, and can not lead the saline-alkali soil layer to return salt to the planting soil layer, and the collected rainwater can be used for greening irrigation, road watering and the like; furthermore, the utility model discloses can also make saline and alkaline land afforestation elevation reduce, reduce the earthwork volume, reduce the runoff pollution to peripheral facilities such as road simultaneously.

Drawings

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is the schematic view of the cross-sectional structure of the soil body of the present invention

Detailed Description

In order to illustrate the invention more clearly, the invention is further described below with reference to preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1-2, the system for collecting and utilizing water resources in saline-alkali regions with overflow pipes of the present invention comprises a soil body 100 and a storage and drainage well 200; the soil body 100 comprises a planting soil layer 1, a permeable membrane layer 2, a water storage layer 3, a waterproof layer 4 and a saline-alkali soil layer 5 which are arranged in sequence from top to bottom; the lower surface of the water storage layer 3 is provided with a groove 6 which protrudes into the saline-alkali soil layer 5, and a hidden pipe 7 is arranged in the groove; the hidden pipe 7 is connected and communicated with the storage and discharge well 200 in the slope direction; the storage and drainage wells 200 are arranged in the soil body 100 at intervals, the depth of each storage and drainage well extends to at least 1m below the groove 6 from top to bottom, the well wall of the part, in contact with the aquifer 3, of each storage and drainage well 200 is of a seepage pipe structure, the well wall of the other part of the well wall is of a waterproof structure, the walls of the storage and drainage wells 200 are provided with overflow drainage pipes 8, and the horizontal height of each overflow drainage pipe 8 is 20-50cm deep in the planting soil layer; the method aims to ensure that the planted plants on the surface of a planting soil layer have enough moisture to nourish, but the plants are not drowned due to excessive water.

According to a preferred embodiment of the present invention, the planting soil layer 1 has a thickness of 60-140 cm.

According to the preferred embodiment of the present invention, the permeable membrane layer 2 is a permeable nonwoven fabric.

According to a preferred embodiment of the invention, the aquifer 3 is a large-pore material such as rock chips or gravel or pp modules with a thickness of 18-60 cm.

According to the preferred embodiment of the present invention, the waterproof layer 4 comprises an upper waterproof geotextile layer, a waterproof membrane layer and a lower waterproof geotextile layer, and extends to the bottom of the well at the overflow water taking and draining well 200; the waterproof layer 4 is arranged, so that rainwater can be prevented from directly permeating into a saline-alkali soil layer below and flowing away after permeating into the water storage layer 3 and then being discharged into the storage and drainage well 200 through the concealed pipe 7; the saline water in the saline-alkali soil layer 5 can be ensured not to reversely permeate into the water storage layer 3, even reversely permeate into the planting soil layer 1, so that the planting soil layer 1 is damaged; the waterproof layer 4 also isolates the mutual water seepage problem between the water storage layer 3 and the saline-alkali soil layer 5 at the position of the storage and drainage well. In addition, the upper waterproof geotextile layer is also helpful for enhancing the toughness and strength of the waterproof layer and preventing the waterproof membrane layer from being damaged by broken stones and the like on the upper layer; also, the lower waterproof geotechnical layer helps to prevent damage to the waterproofing membrane layer from the lower saline-alkali soil layer 5.

According to a preferred embodiment of the present invention, the concealed pipes 7 are arranged at intervals of 6-8 meters; the concealed pipe 7 is a PVC seepage pipe and is communicated with the storage and discharge well 200 in a 2% slope direction; in order to prevent the blind pipe from being blocked by the seepage hole, the blind pipe is coated with a permeable geotextile; the utility model discloses can open out the narrow shape infiltration hole of multirow on the hidden pipe 7 circumference, can be through controlling the aperture ratio, satisfy different ring rigidity and permeability requirement; the underground pipe 7 is coated with the permeable geotextile, so that the water permeating effect can be achieved, and the blockage caused by the silt entering the underground pipe 7 can be avoided.

According to the utility model discloses preferred embodiment, the shaft bottom that holds row well 200 is equipped with the nest of fetching water 9, and in the well head that holds row well 200 was equipped with water intaking pipe 10 and extends to the nest of fetching water 9 always, the rainwater that the convenient extraction was assembled.

According to the utility model discloses preferred embodiment, in this salt alkali territory water resource collection utilization system that contains the overflow pipe and handing-over department such as peripheral building or structure, for preventing rivers and to the influence of infiltration to other structures etc., adopt the side direction waterproof layer to turn over the package and carry out water conservation and prevention of seepage at this system border.

According to the preferred embodiment of the present invention, when the green space is very large, the system for collecting and utilizing water resources in saline-alkali regions with overflow pipes can be divided into a plurality of catchment areas for easy management and control, and the different catchment areas can be separated by reverse wrapping with waterproof geotextile; the height of the turn-up is typically more than 50cm above the aquifer (not shown).

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. Saline-alkali region water resource collection and utilization system who contains overflow pipe, its characterized in that: comprises a soil body and a storage and discharge well; the soil body comprises a planting soil layer, a permeable film layer, a water storage layer, a waterproof layer and a saline-alkali soil layer which are sequentially arranged from top to bottom; the lower surface of the water storage layer is provided with a groove protruding into the saline-alkali soil layer, and a concealed pipe is arranged in the groove; the underground pipe is connected and communicated with the storage and discharge well in a slope direction; the storage and drainage wells are arranged in the soil body at intervals, the depth of the storage and drainage wells extends to the lower part of the groove from top to bottom, the part of the well wall, in contact with the aquifer, of the storage and drainage well wall is of a seepage pipe structure, the other part of the well wall is of a waterproof structure, and overflow drainage pipes are arranged on the storage and drainage well wall and are horizontally arranged at the depth of 20-50cm in the planting soil layer; the joint of the system and the surrounding building or structure adopts a lateral waterproof layer to reversely wrap.

2. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the thickness of the planting soil layer is 60-140 cm.

3. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the permeable film layer is a permeable non-woven fabric.

4. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the aquifer is 18-60cm thick stone chips or broken stones or pp modules.

5. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the waterproof layer comprises an upper waterproof geotextile layer, a waterproof film layer and a lower waterproof geotextile layer, and extends to the bottom of the well at the overflow drainage well.

6. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the concealed pipes are arranged at intervals of 6-8 meters; the concealed pipe is a PVC (polyvinyl chloride) seepage pipe, 2% of the concealed pipe is communicated with the storage and discharge well in the slope direction, and the concealed pipe can be coated with permeable geotextile.

7. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the bottom of the storage and drainage well is provided with a water taking pit, and a water taking pipe is arranged at the wellhead of the storage and drainage well and extends into the water taking pit.

8. The system for collecting and utilizing the water resources of the saline-alkali soil region with the overflow pipe, as claimed in claim 1, wherein: the system for collecting and utilizing the water resources of the saline-alkali region containing the overflow pipe is divided into a plurality of catchment areas, and different catchment areas can be separated by reverse wrapping of waterproof geotextile; the height of the turn-up is typically more than 50cm above the aquifer.