CN101429758A

CN101429758A - Construction method for wet land artificial ecological island

Info

Publication number: CN101429758A
Application number: CNA2008102380052A
Authority: CN
Inventors: 王曙光; 张成禄; 刘菲菲; 赵立健; 卢磊; 石义静; 宋瑞红
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2009-05-13
Anticipated expiration: 2028-12-03
Also published as: CN101429758B

Abstract

The invention provides a method for constructing an artificial ecological island in wetland, which is to stack building waste and river mud or pond sludge into an island body according to the volume ratio of 2 to 3 on the basis of the prior natural island or a hard foundation in the wetland, and level and grind the island body layer by layer during the stacking; the circumference on the top of the island body is placed by stone and cement mortar, and xerophytes and hygrophytes are planted in the middle on the top of the island body; the stone and the cement mortar are used for placing vertically and horizontally frame bodies on the circumferential island slope of the surface of the island body; waste concrete bodies or gravel is filled into spaces of the frame bodies; slurry is sprayed or poured on the waste concrete bodies or the gravel, and the thickness of the slurry can cover the gravel or rubble; hygrophytes, emergent aquatic plants and submerged plants are planted on a slurry layer; and larger plants are planted before the waste concrete bodies or the gravel is filled. The method has low cost, is convenient to construct, is favorable for conserving water and soil, reduces the gradation degree of the island body, and makes a wetland ecosystem maintain stable.

Description

The construction method of wet land artificial ecological island

Technical field

The present invention relates to a kind of construction method of wet land artificial ecological island, belong to water body purification recovery technique field.

Background technology

The island be meant in rivers and lakes by water ring around land, it plays important effect in wetland, especially under the situation that current wetland environment suffers to destroy in various degree.Island in the wetland can change the direction of current, does not cause the dry cutout of wetland when the water yield reduces; Island slope is the media that the island contacts with water, and it provides the place of procreation for microorganism in the absorption suspended material; The existence on island also provides wide living space for amphibious wetland animal and different types of plant, and this is beneficial to the sustainable development of wetland with regard to making the ecosystem on the island be in stable equilibrium state; And adhering to of wetland plant can directly absorb and to organic pollutant degradation nutriments such as nitrogen, phosphorus.

But present island is that nature forms basically, and its composition mainly is naturally occurring clay mineral, is easy to by current scour when the water yield is big, will cause the disappearance on nature island if this process goes on for a long time.Natural island bank protecting method commonly used now has stone masonry method and dry stone wall method.But the solid sloping weak effect of dry stone wall method caves in easily; Stone masonry method Gu Po has stoped the exchange of island and water body, is unfavorable for the protection of wetland.

Man-made island all is to be based upon on the ocean mostly, is used for placing therein oil/gas production and refining equipment.The wetland man-made island is more rare, and the wetland man-made island that has formed also is to construct by the mode of filling deposit, the cost height, and labour intensity is big, and is washed away erosion by flowing water easily after forming, and fastness is poor, and is less to the protective effect of ecological environment.

The Chinese patent of publication number CN2535443 discloses a kind of " steel framework cofferdam type man-made island ", and belong to sea, beach oil field prospecting and develop supporting maritime works's facility, be to can be used as the steel framework cofferdam type man-made island that use in the mud oil well site.The Chinese patent of notification number CN1025230C discloses a kind of " hollow man-made island construction method and monomer structure ", this method comprises the treatment of soft foundation in the marine site of constructing,, delivery prefabricated by the land monomer structure goes into that destination, marine site, installation in place, piling and joint sealing, plate fill out that sand increases the weight of, an internal drainage, drainage trenching, completion are paid a few step operations and formed, the monomer whose structure is made of base plate, panel, counterfort and wave wall, and some monomer structures promptly form artificial hollow island through combine and assemble.These two kinds of man-made islands all are marine man-made islands, float on the sea, and bigger with the difference of man-made island in the wetland, its method and structure is not suitable for constructing of wetland man-made island, does not have the ecological environmental protection effect yet.

Summary of the invention

The present invention is directed to island slope that existing wetland nature island exists and easily wash away the deficiency that problem and existing wetland man-made island are constructed technology, provide that a kind of cost is low, sound construction, be beneficial to the construction method of the wet land artificial ecological island of environmental protection.

The construction method of wet land artificial ecological island of the present invention is:

In wetland, have now on the basis of hard place base in nature island or the wetland, with building castoff (mixture of masonry and concrete body) and river silt or pond sludge is that the ratio of 2:3 piles the island body with the volume ratio, successively smooth in the banking process, roll, use stone and masonry of cement mortar around at body top, island, crown center plantation drought is given birth to and hygrophyte, on the island slope of surface, island periphery, be built into the frame body that links to each other in length and breadth with stone and cement mortar, space area occupied in the frame body is 3:2 with the ratio of frame body area occupied, inner useless concrete body or the gravel of filling in the space of frame body, on useless concrete body or gravel, spray or perfusion mud, the thickness of mud can cover gravel or rubble is degree, on mud layer, plant plant then, the plant of planting plant hygrophyte from top to bottom respectively along island slope branch gradient, emergent aquactic plant and submerged plant are planted before filling useless concrete body or gravel for bigger plant (as shrub and arbor).

The particle diameter of building castoff is 8cm-12cm.

Frame body can be made up of single cross-shape frame.

The present invention utilizes the building castoff structure, reinforces and the plantation plant with frame body, and cost is low, simple in structure, easy construction helps conserving water and soil, reduce the degree that the island body is washed away, for animals and plants and microorganism provide living environment, increased moist floristic diversity, help pollution abatement, the effect of strengthened purification water quality, make wetlands ecosystems keep stable, and have the effect of beautifying the environment, also have regulating flow simultaneously, prevent the function that stops.

Description of drawings

Fig. 1 is the overall structure schematic diagram that adopts the wet land artificial ecological island that the present invention constructs;

Fig. 2 is the partial structurtes schematic diagram of frame body.

Fig. 3 is the polygonal frame schematic diagram.

Wherein: 1, stone, 2, useless concrete body or gravel, 3, mud, 4, hygrophyte, 5, emergent aquactic plant (or taking root fluitante), 6, submerged plant, 7, reinforce buttress.

The specific embodiment

Embodiment

As shown in Figure 1, constructing of wet land artificial ecological island of the present invention is to be that building castoff (mixture of masonry and concrete body) and river, the pond sludge of 8-12cm is that the ratio of 2:3 piles the island body with the volume ratio by particle diameter on the basis of hard place base in existing nature island or the wetland in wetland earlier, successively smooth in the banking process, roll, island height degree can be set according to actual environment.Adopt cement mortar to grout periphery with stone 1 around the top of island body, middle plantation drought is given birth to or hygrophyte (as weeping willow, locust tree etc.).On island slope, add cement mortar with stone 1 and be built into framework and be cured, the structure of framework is made up of single cross-shape frame as shown in Figure 2.The shape of framework also can be polygon as shown in Figure 3 and reinforcing buttress 7 is set that the shape of framework also can be circle, rhombus or other shape on framework.Fill useless concrete body or gravel 2 in the framework space, on useless concrete body or gravel 2, spray afterwards or mud 3 that perfusion is mixed in the ratio of mass ratio 1:1.4-1.6 by soil and water.Space (area of uncured is concrete body or the shared area of the gravel) area occupied in the frame body and the ratio of frame body (area of curing) area occupied are 3:2.Divide gradient plantation plant along island slope, hypomere kind planting submerged plant 6 (as eel grass, golden algae etc.), the stage casing plantation is water water plant 5 (as reed, lotus, nutgrass flatsedge, cattail etc.) very, epimere plantation hygrophyte 4 (as Chinese tamarisk etc.).

Current are during through the island body, and the existence of framework makes the island body be not easy to be washed away by water, play the effect of Gu Po protection.Island slope upper branch ladder degree is planted heavy water-based, is endured water-based, hygrophyte, can prevent erosion; Simultaneously, because inside of frame is filled useless concrete body or gravel 2 is cured, help the water exchange between water body and the island body, the effect of play purifying water body, beautifying the environment.Biodegradation of the microorganism that the island body adheres to and island slope plant make water body be purified to the absorption of nutriments such as nitrogen phosphorus with to the degradation of organic pollution.

The present invention has the following advantages:

1. eliminate the drawback of loose stone method and stone masonry method, be conducive to conserve water and soil, reduced the degree that the island body is washed away.

2. provide living environment for animals and plants and microorganism, made wetlands ecosystems keep stable, had the effect of beautifying the environment.

3. island slope upper branch ladder degree kind is implanted with heavy water-based, swimming property, the dissimilar plant such as moist, has increased floristic many Sample is conducive to pollution abatement, the effect of strengthened purification water quality.

4. change the direction of advance of current, simultaneously so that the upper pond level lifting, regulating flow prevents cutout.

5. construction cost is low, and is simple in structure, and easy construction also can be used for the reinforcing on nature island.

Claims

1. the construction method of a wet land artificial ecological island, it is characterized in that: in wetland, have now on the basis of hard place base in nature island or the wetland, with building castoff and river silt or pond sludge is that the ratio of 2:3 piles the island body with the volume ratio, successively smooth in the banking process, roll, use stone and masonry of cement mortar around at body top, island, crown center plantation drought is given birth to and hygrophyte, on the island slope of surface, island periphery, be built into the frame body that links to each other in length and breadth with stone and cement mortar, space area occupied in the frame body is 3:2 with the ratio of frame body area occupied, inner useless concrete body or the gravel of filling in the space of frame body, on useless concrete body or gravel, spray or perfusion mud, the thickness of mud can cover gravel or rubble is degree, on mud layer, plant plant then, the plant of planting plant hygrophyte from top to bottom respectively along island slope branch gradient, emergent aquactic plant and submerged plant are planted before filling useless concrete body or gravel for bigger plant.

2. according to the construction method of the described wet land artificial ecological island of claim 1, it is characterized in that the particle diameter of described building castoff is 8cm-12cm.

3. the construction method of wet land artificial ecological island according to claim 1 is characterized in that, described frame body can be made up of single cross-shape frame.

4. according to the construction method of the described wet land artificial ecological island of claim 1, it is characterized in that the mud of described injection or perfusion is mixed in the ratio of mass ratio 1:1.4-1.6 by soil and water.