CN202202311U

CN202202311U - Superposed drainage and waterlogging-reduction structure for farmland

Info

Publication number: CN202202311U
Application number: CN2011203206718U
Authority: CN
Inventors: 吴玉柏; 纪建中; 陈凤; 张华�
Original assignee: Jiangsu Province Institute Of Hydro-Technical Research
Current assignee: Jiangsu Province Institute Of Hydro-Technical Research
Priority date: 2011-08-30
Filing date: 2011-08-30
Publication date: 2012-04-25
Anticipated expiration: 2021-08-30

Abstract

The utility model discloses a superposed drainage and waterlogging-reduction structure for farmland, which comprises an open drain and a waterlogging-reduction subdrain, wherein the waterlogging-reduction subdrain is arranged below the open drain in the same direction as the open drain. In the superposed drainage and waterlogging-reduction structure for farmland, a waterlogging-reduction system such as the subdrain, a closed conduit or the like is arranged below a drainage system such as a lateral canal, a field ditch or the like, which breaks through the spatial arrangement mode of the waterlogging-reduction system and the drainage system, greatly reduces the quantities and the occupied land of the open drain, effectively controls the ground water table, realizes quick waterlogging reduction and desalinization, and saves land; and the superposed drainage and waterlogging-reduction structure for farmland has the advantages of simple structure, low construction cost and wide adaptability, can satisfy the requirements for drainage, waterlogging reduction, desalinization and preventing secondary soil salinization in the immense farmland of China, particularly the tidal flat reclamation areas and the inland saline areas.

Description

Structure falls in farmland superposed type row

Technical field

The utility model relates to a kind of agricultural drain and falls the stain structure, and structure falls in the farmland superposed type row that stain covered conduit (pipe, moisture in the soil) draining falls in water drainage open drain, specifically a kind of employing top, bottom.

Background technology

Since the own agricultural production of human society, farmland irrigating drainage has just been arranged.China's farm field irrigation drainage is with a long history, and five periods in generation, Taihu Lake basin formed the Pu Tang network of waterways in Jiangsu, in order to draining, irrigation and shipping.Because the natural conditions of various places are different with waterlogging stain the condition of a disaster, thereby its corresponding drainage requirement is also inequality.Country fair district, the southern Plain drainage requirement that the waterlogging stain is more serious is urgent.The arterial drainage measure of south Plain Xu Qu is that at first lock is built in fill, joins country fair and protective embankment, casts aside flood, dams, the prerequisite of the resolving agricultural drain problem of promptly controlling flood; Next takes the water drainage of rational water logging control measure such as burst, contour interception, strives from arranging, be aided with the row of carrying, and stays the lake to hold stagnant, row and holds combination, and irrigation and drainage take into account, the comprehensive regulation etc.

Use more water discharge technology at present and can be divided into land drainage and underdrainage, INDOOR FLOOR WATER DRAINAGE TECHNOLOGY has drainage by open canal, hidden pipe (large-scale) draining; The underdrainage technology has water discharge technologies such as closed drainage, dark moisture in the soil draining, mole drainage.Drainage by open canal is traditional water discharge technology, develops comparative maturity, and the drainage by open canal system is by streams at different levels, discharge structure and hold and let out the district and forms, has shortcomings such as taking up an area of many, increase raceway groove desilting expense.The farmland underdrainage is divided into closed drainage and stain falls in hidden pipe.Closed drainage engineering in field generally is made up of suction water pipe, header (ditch), ancillary building and discharge outlet.Closed drainage began to take shape in mid-term in last century, and in recent years along with the development of ditching pipe-laying machine, states such as the many in the world countries such as the U.S., Japan, Egypt are used widely.

Han dynasty before 2000, Chinese have just grasped " salt comes with water, goes with water " rule, have begun the practice of alkaline land improving.At that time, our ancestors mainly adopt the water conservancy measure to improve.Hydraulic engineering measure improvement salination soil, the main employing digs trenches to drain the water away, and dewatering and fresh water flushing reduce measures such as arable layer salt content.China's systematic research starts from the 1950's; The design specifications in gutter, trend reach the relation with physical features; The relation of gutter and groundwater table, soil layer construction, all there is detailed research the aspects such as scope of the draining in gutter, salt discharge effect and draining, salt discharge.Since the twenties in 20th century, just the begin one's study relation of the groundwater table and the soil salinization of the Soviet Union and Hungary, and trench digging is got rid of underground water study; The U.S., Britain, India just study in 19th century and dig trenches to drain the water away and fresh water desalinization of soil by flooding or leaching measure; Countries such as Canada to dig trenches to drain the water away with fresh water desalinization of soil by flooding or leaching technical research all early.

Traditional sub lateral drainage ditch falls stain in order to take into account, and the degree of depth is about 1 ~ 1.5m, and section is very big, and the corresponding engineering amount is also very big, subsides easily, and maintenance cost is high.The secretly price-reduction system is arranged in the field mostly at present, discharges from farm ditch, and controlling depth is not enough, does not reach the effect that stain falls in salt discharge.

Summary of the invention

The purpose of the utility model provides a kind of farmland row and falls superposition mode, and this structure will be fallen the stain covered conduit and is arranged in the below, open drain, form the light and shade superposition mode.Water drainage with fall stain separately, bright row's secretly price-reduction, simple in structure, cheap, save the soil, reduce engineering quantity, improve the stain desalination level of falling.

The purpose of the utility model realizes through following technical scheme:

Structure falls in a kind of farmland superposed type row, it is characterized in that: this structure comprises the open drain and falls the stain covered conduit, and the said stain covered conduit that falls is arranged in the below of open drain, and it is identical with the arranged direction of open drain to fall the stain covered conduit.

In the utility model, said open drain is the bright row's ditch of farm ditch level.Said falling steeped the below that covered conduit is arranged in the bright row's ditch of farm ditch level.

The form of fracture of said open drain is a rectangle or trapezoidal.The said stain covered conduit that falls is that stain falls in covered conduit, hidden pipe, dark moisture in the soil, mouse road, and form of fracture be circle, rectangle or trapezoidal.

The utility model will fall stain system (falling the stain covered conduit) and be arranged in drainage system (open drain) below; Form the light and shade superposition mode, traditional drainage system has been carried out the improvement of novelty, will drain flooded fields and fall stain separately; Effectively control groundwater table; Improve and fall stain desalination level, also can save the soil simultaneously, reduce engineering quantity, in coastal reclamation area reclamation process, wide application prospect is arranged.

Description of drawings

Fig. 1 be the utility model transverse cross-sectional view;

Fig. 2 is the longitudinal sectional drawing of the utility model.

The specific embodiment

Structure falls in the described farmland of a kind of the utility model superposed type row, sees Fig. 1 and Fig. 2, and this structure comprises open drain 1 and will fall stain covered conduit 2, fall stain covered conduit 2 and be arranged in the below of open drain 1, and it is identical with the arranged direction of open drain 1 to fall stain covered conduit 2.Open drain 1 is the bright row's ditch of farm ditch level.Fall and steep the below that covered conduit 2 is arranged in the bright row's ditch of farm ditch level.The form of fracture of open drain 1 is a rectangle or trapezoidal.Fall stain covered conduit 2 and fall stain for covered conduit, hidden pipe, dark moisture in the soil, mouse road, form of fracture is circular, rectangle or trapezoidal.

The construction technology that superposition mode falls in farmland row is following:

It is more that the layout influence factor of superposition mode falls in farmland row, at first confirms parameters such as the suitable position that falls stain system (hidden pipe, dark moisture in the soil etc.), width, the degree of depth, spacing according to the soil types of locality, quality, groundwater table, field block specifications etc.Confirm the parameters such as width, the degree of depth of drainage system again.

Use ditching machine or ditching plow to fall the covered conduit (dark moisture in the soil) of stain or hidden pipe is installed then by standard according to fixed parameter excavation.

The parameter that last basis is confirmed is arranged bright row's ditch above drainage system, saved and partly excavated the stemming operation amount.

The utility model is through changing traditional arrangement of Drainage form; To fall the stain covered conduit and be arranged in the below, open drain, draining flooded fields and falling stain separately, bright row's secretly price-reduction; Simple in structure, minimizing engineering quantity; Improve and fall stain desalination level, effectively control groundwater table, also can save soil and construction simultaneously.

Claims

1. structure falls in a farmland superposed type row; It is characterized in that: this structure comprises open drain (1) and falls stain covered conduit (2); Said fall the stain covered conduit (2) be arranged in the below of open drain (1), and fall the stain covered conduit (2) identical with the arranged direction of open drain (1).

2. structure falls in farmland according to claim 1 superposed type row, it is characterized in that: said open drain (1) is the bright row's ditch of farming level.

3. structure falls in farmland according to claim 2 superposed type row, it is characterized in that: said falling steeped the below that covered conduit (2) is arranged in the bright row's ditch of farming level.

4. structure falls in farmland according to claim 1 superposed type row, and it is characterized in that: the form of fracture of said open drain (1) is a rectangle or trapezoidal.

5. structure falls in farmland according to claim 1 superposed type row, it is characterized in that: the said stain covered conduit (2) that falls falls stain for covered conduit, hidden pipe, dark moisture in the soil, mouse road, and form of fracture is circular, rectangle or trapezoidal.