CN208039146U - A kind of Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body - Google Patents

Abstract

The utility model is related to a kind of Eco-hydrological connectivity structures for wetland both sides of the road shallow-layer water body, including gravel gabion collecting gutter, concrete walls, first metalling, the midline position of adjacent two stifled concrete walls is equipped with corrugated steel tube access along the cross section of wetland road on first metalling, the corrugated steel tube access is axially that oblique L-shaped is connected to wetland both sides of the road shallow-layer water body, gravel is laid on the corrugated steel tube access into second metalling contour with concrete walls, second metalling is fixed on the honeycomb steel structural layer on concrete walls top surface equipped with bottom, the honeycomb steel structural layer is equipped with rubber grain concrete layer, the rubber grain concrete layer is equipped with upper subbase, it states upper subbase both sides and is laid with scree formation gravel substrate.The utility model can effective guarantee wetland both sides of the road water body connectivity, while having the function of that wetland ecotourism migrates channel, can ensure the stability of wetlands ecosystems.

Description

A kind of Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body

Technical field

The utility model is related to ecological environment fields, more particularly to a kind of life for wetland both sides of the road shallow-layer water body State hydrology connectivity structure is particularly suitable for the water ecology hydrology connection of wetland park garden road both sides.

Background technology

Wetland waterbird situation is one of most important factor in Wetland Environment, and wetland is between land and water body, thus Wetlands ecosystems are especially sensitive to the change of water and its motion mode, if external force directly act on wetland insulated stream and Subsurface flow will hinder Wetland waterbird cycle and connectivity, and then influence the stabilization of wetlands ecosystems.And wetland roadbed Build has seriously blocked the water-based connection of roadbed both sides wetland shallow-layer, causes plant growth area upstream water level to rise, the level of tail water It reduces, destroys the original balance of wetland water system, compromise the growth of wetland plants on both sides, while migrating to the region wetland ecotourism It causes to obstruct, serious negative effect is brought to wetlands ecosystems.

In order to solve the above problem, people mostly use the method for setting culvert or corrugated steel tube to increase surface drainage connection. But the use of culvert or corrugated steel tube is only capable of providing limited water system access in wide range and biology migrates channel, can not Complete incidence graph wetlands ecosystems are blocked the ecological nuclear sterile barley brought.And if culvert or corrugated steel tube setting are overstocked, The stability that can influence roadbed again, is unfavorable for the maintenance of wetland road.

Utility model content

The purpose of this utility model is moved for caused both sides of the road hydrology connectivity after wetland road construction and biology Move channel blocking the problems such as, propose that a kind of low influence that the Eco-hydrological for wetland both sides of the road shallow-layer water body is connected to is developed Structure, the structure structure hydrology connectivity layer and wetland ecotourism can migrate access under conditions of ensureing that road foundation is stablized, prevent Wetland waterbird and ecological connectivity generation after road construction largely decline, and ensure the stabilization of wetlands ecosystems.

To achieve the above object, the utility model provides a kind of Eco-hydrological for wetland both sides of the road shallow-layer water body Connectivity structure, including it is disposed longitudinally on the gravel gabion collecting gutter of the roadbed slot both sides after dredging, at least two stifled horizontal along roadbed slot The concrete walls of section setting, the first metalling being arranged between the gabion collecting gutter and concrete walls, described arbitrary The first metalling upper surface midline position between two adjacent stifled concrete walls is equipped with corrugated steel tube access along road cross section, The corrugated steel tube access is axially that oblique L-shaped is connected to wetland both sides of the road shallow-layer water body, the corrugated steel tube access and first broken Gravel is laid in rock layers into second metalling contour with concrete walls, second metalling is fixed on mixed equipped with bottom Honeycomb steel structural layer on solidifying cob wall top surface, the honeycomb steel structural layer are equipped with rubber grain concrete layer, the rubber Grain concrete layer, which is equipped with, is laid with upper subbase, and the upper subbase both sides are laid with scree and form gravel substrate.

Preferably, the gravel gabion collecting gutter is equal with wetland link length, width 50cm, the gravel gabion collection The top surface in ditch is identical as the wetland substrate level of homonymy, and the grain size of gravel in the gravel gabion collecting gutter is 10~15cm.

Preferably, between the concrete walls between be divided into 150~250cm, the thickness of the concrete walls is 30~ The height of 50cm, the concrete walls are higher 50cm than the wetland substrate in wetland road downstream side.

Preferably, first metalling upper surface is contour with wetland original substrate and the gradient is identical；Second metalling Upper surface and concrete walls upper surface are contour, and upper surface ensures level；Rubble in first metalling, the second metalling Grain size is 3~5cm.

Preferably, the corrugated steel tube access is wrapped in the second metalling, and position is arranged by adjacent two stifled coagulation Each section of the first rubble interval midline position that cob wall separates.

Preferably, the corrugated steel tube access by corrugated steel tube obliquely and the transverse wave fastener for connection of water intake end and At the downstream of the corrugated steel tube access exceeds roadbed slot, and the upstream end nozzle of the corrugated steel tube access is withered higher than wetland The upstream end nozzle of water level water surface elevation, the corrugated steel tube access is equipped with steel grid double-edged fine-toothed comb.

Preferably, camber, the corrugated steel after the completion of ground residual settlement is axially arranged in the corrugated steel tube access The transverse wave lengths of steel pipes tube bottom of pipe access is identical as wetland original substrate absolute altitude and the gradient is identical.

Preferably, the honeycomb steel structural layer is the steel framework rack-layer with cellular porosity, the honeycomb steel structural layer Surface and the carbon steel sheet that bottom surface is 3cm thickness, the honeycomb steel structural layer centre are the honeycomb ceramics knot that multilayer corrugated steel plate is constituted Structure；The thickness of the honeycomb steel structural layer is 30~50cm, and the hole of the honeycomb steel structural layer is 3~5cm.

Preferably, the thickness of the rubber grain concrete layer is 50~80cm；Institute in the rubber grain concrete layer It is 2~3cm with rubber grain grain size, and the rubber grain is impregnated through 1% silane coupling agent and is modified.

Preferably, the rubber grain concrete preparation process of the rubber grain concrete layer includes：

According to concrete strength standard, by rubber grain with 15% it is isometric for sand volume incorporation mass ratio for 7:3 The concrete that is mixed to form of cement and flyash in.

Preferably, the ballast grain sizes in the gravel substrate are 5~10cm；The aperture of the steel grid double-edged fine-toothed comb is 10cm.

The another object of the utility model is to provide a kind of Eco-hydrological company for wetland both sides of the road shallow-layer water body The construction method of logical structure, including the Eco-hydrological connectivity structure is built as follows：

A, it intercepts Flow in Wetland in wetland both sides of the road and drains, lower digging mud to good ground, form roadbed slot, and press Roadbed laying specification laying bottom roadbed is simultaneously smooth；

B, the interval setting concrete walls above roadbed slot, and the first metalling is laid between adjacent concrete wall, Each section of the midline position that first metalling is divided by concrete walls buries corrugated steel tube access, and the corrugated steel tube is logical The corrugated steel tube obliquely and transverse wave steel pipe for routeing water intake end are constituted, the inside and outside tube wall pitching of the corrugated steel tube access Layer, 0.8~1.2% camber is axially arranged in the corrugated steel tube access, broken in the corrugated steel tube access and first later Rock layers top is laid with rubble, forms the second metalling, and ensure that second metalling is contour and horizontal with concrete walls；

C, gabion collecting gutter is built in the roadbed slot substrate of lower layer's roadbed both sides, on the upside of the second metalling and concrete walls It is laid with honeycomb steel structural layer, the honeycomb steel structural layer is fixed on concrete walls, is equipped on the upside of the honeycomb steel structural layer Rubber grain concrete layer (5), and on the rubber grain concrete layer upper subbase is laid with by construction requirement.

D, gabion collecting gutter, the first metalling, the second metalling, honeycomb steel structural layer, rubber grain concrete layer and On the outside of upper subbase gravel substrate is formed by the scree that foundation construction specification laying depth is gradually reduced from down to up.

Based on the above-mentioned technical proposal, the utility model has the advantages that：

The Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body of the utility model can effective guarantee wetland The connectivity of both sides of the road water body, while having the function of that wetland ecotourism migrates channel.Steel double-edged fine-toothed comb, rubble gabion and scree can To stop plant residue and silt in wetland water body etc., ensure connectivity structure long-time steady operation.Honeycomb steel construction simultaneously Layer and rubber grain concrete layer have stronger anti-pressure ability and preferable elastic deformation ability, can significantly improve be laid on it is wet Road stability in ground ensures road safety.In addition, rubber grain concrete layer has preferably resistance compared with general concrete layer It is aqueous, it can prevent the water in water stream channel from moving up destruction road foundation.

Description of the drawings

Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application, The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model It limits.In the accompanying drawings：

Fig. 1 is Eco-hydrological connectivity structure situation map；

Fig. 2 is Eco-hydrological connectivity structure Longitudinal cross section schematic；

Fig. 3 is Eco-hydrological connectivity structure cross-sectional view；

Fig. 4 is Eco-hydrological connectivity structure structure on two sides schematic diagram；

Specific implementation mode

Below by drawings and examples, the technical solution of the utility model is described in further detail.

The utility model provides a kind of Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body, such as Fig. 1 Shown in~Fig. 4, a kind of preferred embodiment of the utility model is shown.The utility model is in the roadbed of wetland road The Eco-hydrological connectivity structure layer that addition contacts passage layers by the hydrology and protective layer is constituted allows Flow in Wetland and biology relatively certainly By by roadbed blacked-out areas, ensure wetland water body hydrology connectivity as a whole and ecosystem integrity.

Specifically, the Eco-hydrological connectivity structure includes the gravel gabion of the roadbed slot both sides after being disposed longitudinally on dredging Collecting gutter 2, is filled in the gabion collecting gutter 2 and coagulation at least two stifled concrete walls 6 being arranged along roadbed slot cross section The first metalling 8 between cob wall 6, the midline position of adjacent two stifled concrete walls 6 is along wetland road on first metalling 8 Corrugated steel tube access 7 is buried in 1 cross section, and the access of the corrugated steel tube access 7 is axially that oblique L-shaped is connected to 1 liang of wetland road Side shallow-layer water body is laid with gravel on 7 and first metalling 8 of the corrugated steel tube access at contour with concrete walls 6 second Metalling 9, second metalling 9 are fixed on the honeycomb steel structural layer 4 on 6 top surface of concrete walls, the bee equipped with bottom Nest steel structural layer 4 is equipped with rubber grain concrete layer 5, and the rubber grain concrete layer 5 is equipped with upper subbase 3, above-mentioned All structure both sides are laid with scree and form gravel substrate 10.

As shown in Figure 1, determining what needs arranged according to width of subgrade planning within the scope of the proposed wetland Region for setting road Wetland is divided into wetland upstream region A and wetland downstream area B by wetland range, wetland road 1, in 80~150cm of roadbed both sides In the range of cleaning underwater mud formed roadbed slot.According to wetland bottom earth formation, determine mud cutting depth until stabilization Ground layer, to ensure road foundation overall stability.After mud cleaning, as shown in figure 4, longitudinally being set along planning roadbed both sides Set gravel gabion collecting gutter 2.Preferably, the gravel gabion collecting gutter 2 and 1 equal length of wetland road, width 50cm, institute The top surface for stating gravel gabion collecting gutter 2 is identical as 11 height of wetland substrate of homonymy, the gravel in the gravel gabion collecting gutter 2 Stone grain diameter is 10~15cm.

As shown in Fig. 2, wetland substrate upper edge roadbed slot cross section after the cleaning pours no less than two stifled concrete walls 6, The quantity of concrete walls 6 determines that the interval between two walls is advisable with 150~250cm according to link length, the concrete walls 6 thickness is 30~50cm, the 11 high 50cm of wetland substrate of the height of the concrete walls 6 than 1 downstream side of wetland road.It is described After the completion of concrete walls 6 pour, it is laid with the backfilled roadbed supported slot of specification according to road foundation, backfill thickness is by road downstream side wetland Substrate level determines, ensures at the top of backfill layer than 11 low 30~50cm of downstream side wetland substrate.In gabion collecting gutter 2 and concrete Rubble is filled in the region that wall 6 surrounds, forms the first metalling 8, and ballast grain sizes are advisable with 3~5cm, arrange the first metalling 8, keep its upper surface and wetland original substrate contour.

As shown in figure 3, the midline position of 8 upper surface of the first metalling between two stifled concrete walls 6 of arbitrary neighborhood The corrugated steel tube access 7 of a diameter of 40cm is buried along the cross section of wetland road 1.Preferably, the axis of the corrugated steel tube access 7 To setting camber, the tube bottom of the corrugated steel tube access 7 is identical as 11 absolute altitude of wetland substrate after the completion of ground residual settlement, The gradient is identical as the wetland original substrate gradient.The axial corrugated steel tube access 7 is oblique L-shaped, and the corrugated steel tube access 7 is by entering The corrugated steel tube obliquely of water end (W.E.) is formed with transverse wave fastener for connection, and the downstream of the corrugated steel tube access 7 exceeds roadbed Slot, the upstream end nozzle of the corrugated steel tube access 7 are higher than wetland low water level water surface elevation, the corrugated steel tube access 7 it is upper It swims end pipe mouth and is equipped with steel grid double-edged fine-toothed comb, the aperture of the steel grid double-edged fine-toothed comb is 10cm.After the completion of corrugated steel tube access 7 is embedded, profit It will be filled and led up to contour with concrete walls 6 with rubble, the second metalling 9 is formed on corrugated steel tube access 7 and the first metalling 8.

Preferably, it sets up cellular steel structure sheaf 4 on first metalling 8 and is fixed in the top surface of concrete walls 6 On.The honeycomb steel structural layer 4 is the steel framework rack-layer with cellular porosity, the surface and bottom surface of the honeycomb steel structural layer 4 For the carbon steel sheet of 3cm thickness, 4 centre of the honeycomb steel structural layer is the honeycomb body structure that multilayer corrugated steel plate is constituted.The bee The thickness of nest steel structural layer 4 is 30~50cm, and the hole of the honeycomb steel structural layer 4 is 3~5cm.Honeycomb steel structural layer 4 is conducted oneself with dignity Gently, intensity is high, has good covering rigidity, while its waterproof and anti-seismic performance are good, while ensureing roadbed integral strength, Access can be provided for flow by honeycomb hole, ensure Eco-hydrological connectivity.

Further, rubber grain concrete layer 5, the rubber grain coagulation are equipped on the honeycomb steel structural layer 4 The thickness of soil layer 5 is advisable with 50~80cm.Continue to be laid with upper layer by subgrade construction specification on the rubber grain concrete layer 5 Roadbed 3.

Preferably, the rubber grain concrete preparation process of the rubber grain concrete layer 5 includes：

According to concrete strength standard by rubber grain with 15% it is isometric for sand volume incorporation mass ratio be 7:3 In the concrete of cement and flyash.Rubber grain grain size used in the rubber grain concrete layer 5 is 2~3cm, and institute It states rubber grain and impregnates modification through 1% silane coupling agent.The rubber grain concrete prepared with this condition, compression strength Can be more than C30 close to C40 grades, flexural strength is slightly below C30 grades.Since rubber grain concrete is with waterproof, close The features such as small, toughness is high, cracking resistance is good, deformability is strong, mechanical property can be restored is spent, so it has the preferable energy that blocks water Power can prevent Flow in Wetland from moving up damage upper subbase 3, at the same can mitigate pressure that upper subbase 3 transmits with Impact force protects understructure.

As shown in figure 3, in above-mentioned all structure both sides laying screes formation gravel substrates 10, in the gravel substrate 10 Ballast grain sizes be 5~10cm, form the road structure of complete wetland road 1.In the present invention, gabion collecting gutter 2, The hydrology that first metalling 8, the second metalling 9, corrugated steel tube access 7 collectively form ground with honeycomb steel structural layer 4 is connected to work( Ergosphere, the 10 common structure of gravel substrate of concrete walls 6, rubber grain concrete layer 5, upper subbase 3 and surrounding in roadbed slot At accessory structure.

To further illustrate the Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body of the utility model Structure and its building mode are chosen illustrate for certain Wetland Park road to be built below, the width of subgrade on the Wetland Park road For 5m, road is forthright, and length 250m, road upstream side substrate is higher than downstream side substrate 10cm concrete structures and construction step It is as follows：

1), scene prepares.

Flow in Wetland is intercepted in both sides of the road and is drained, lower digging mud 100cm to good ground, and ground foundation trench is formed；By road The base laying specification laying bottom roadbed extremely substrate 30cm away from road downstream side wetland is simultaneously smooth.

2) connectivity structure, is built.

Concrete walls 6 are set every 200cm above soil matrix, wall is higher by 50cm than wetland downstream side substrate.Each coagulation The first metalling 8 is laid between cob wall 6, the 8 upper surface gradient of the first metalling is identical as the wetland original substrate gradient, i.e., upstream side is thick 40cm, downstream side thickness 30cm.Each section of the midline position divided by concrete walls 6 on each first metalling 8 buries ripple Steel pipe access 7, corrugated steel tube access 7 are made of the corrugated steel tube obliquely that caliber is 40cm and transverse wave steel pipe, the wave The inside and outside tube wall pitching layer of line steel pipe access 7.The water intake end of corrugated steel tube access 7 is oblique corrugated steel tube, inclined tube center line Equal with water intake end wetland ordinary water level, water intake end constant aperture is the steel grid double-edged fine-toothed comb of 10cm or so.The corrugated steel tube is logical 0.8% camber of the axial setting in road 7, after the completion of ground residual settlement, the tube bottom of 7 water outlet of corrugated steel tube access and water outlet Wetland bottom surface absolute altitude is held to keep identical, the traversing section steel pipe gradient is identical as the wetland original substrate gradient.Later in the corrugated steel Pipe access 7 and 8 top of the first metalling are laid with rubble, form the second metalling 9, and ensure the second metalling 9 and concrete walls 6 It is contour.

3) accessory structure, is built.

Gabion collecting gutter 2, thickness 50cm, top surface and its homonymy are built in the roadbed slot substrate of lower layer's roadbed both sides The height of former wetland substrate 11 it is identical, the grain size of gravel in the gabion collecting gutter 2 is 10~15cm.

The honeycomb steel structural layer 4 of 30cm thickness, honeycomb steel structural layer 4 are laid with 6 upside of concrete walls in the second metalling 8 It is fixed on concrete walls 6, honeycomb hole is advisable with 3~5cm.It is laid with the rubber of 50cm thickness in 4 upside of honeycomb steel structural layer Grain concrete layer 5, and on rubber grain concrete layer 5 upper subbase 3 is laid with by construction requirement.

Gabion collecting gutter 2, the first metalling 8, the second metalling 9, honeycomb steel structural layer 4,5 and of rubber grain concrete layer 3 outside of upper subbase forms gravel substrate 10 by the scree that foundation construction specification laying depth is gradually reduced from down to up, with Each layer of roadbed and connectivity structure are protected.

The Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body of the utility model adds in common roadbed Eco-hydrological connectivity capabilities layer is entered, has ensured that roadbed has the function of that certain discharge capacity and biology are migrated, each structure is specific Function is as follows：

Concrete walls are the stable frame to provide the foundation in roadbed, while can be by honeycomb steel structural layer and rubber grain The pressure that concrete layer is subject to is transmitted downwards, and the safety and stability of honeycomb steel structural layer and rubber grain concrete layer is protected.

First metalling can be connected to the phreatic water and earth's surface of both sides of the road wetland upstream and downstream with the second metalling Water has the function of hydrology unicom.

The biology that corrugated steel tube access may be constructed both sides of the road wetland upstream and downstream migrates channel, while having flow logical The function in road.

Honeycomb steel structural layer has the function of to contact the surface water of both sides of the road wetland upstream and downstream, while honeycomb has Higher anti-pressure ability, can be protected while ensureing wetland subgrade stability the first metalling below, the second metalling and Corrugated steel tube access structure.

Rubber grain concrete has the characteristics such as preferable elasticity and water preventing ability, water preventing ability compared with normal concrete It can prevent the water on the downside of roadbed from moving up and being damaged to roadbed, and preferable elasticity can make the layer with good Buffer capacity ensures that the structure on the downside of it is not damaged.

The concrete operating principle of the Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body of the utility model It is as follows：

Wetland upstream water intake end, wetland phreatic water and wetland superficial water flow through underground or gabion filtering enters gabion collection Ditch simultaneously flows to water outlet end by the first metalling of underground, the second metalling.When wetland upstream water is larger, flow By there is the honeycomb steel structural layer of the corrugated steel tube access of steel double-edged fine-toothed comb structure and its upper layer to flow to water outlet end.Wetland water simultaneously Biology also can downstream be migrated by corrugated steel tube access or the cellular porosity on its upper layer.When water reaches water outlet end, The gravel substrate seepage flow formed by rubble gabion and the scree of rear side enters Downstream Wetland region.And lead to when water is larger The flow of the honeycomb steel structural layer outflow on corrugated steel tube access and its upper layer is crossed due to water exit end rubble gabion and gravel substrate Blocking flows into Downstream Wetland region with relatively slow flow velocity.Ensure the company of the Wetland waterbird connection and the ecosystem of wetland both sides of the road It is logical, while reducing flow and downstream soil matrix is washed away.

The Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body of the utility model can effective guarantee wetland The connectivity of both sides of the road water body, while having the function of that wetland ecotourism migrates channel.Steel double-edged fine-toothed comb, rubble gabion and scree can To stop plant residue and silt in wetland water body etc., ensure connectivity structure long-time steady operation.Honeycomb steel construction simultaneously Layer and rubber grain concrete layer have stronger anti-pressure ability and preferable elastic deformation ability, can significantly improve be laid on it is wet Road stability in ground ensures road safety.In addition, rubber grain concrete layer has preferably resistance compared with normal concrete layer It is aqueous, it can prevent the water in water stream channel from moving up destruction road foundation.

Finally it should be noted that:Above example is only to illustrate the technical solution of the utility model rather than limits it System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should Understand：It can still modify to specific embodiment of the present utility model or some technical characteristics are equally replaced It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model In range.

Claims (10)

1. a kind of Eco-hydrological connectivity structure for wetland both sides of the road shallow-layer water body, it is characterised in that：Including longitudinally disposed The gravel gabion collecting gutter (2) of roadbed slot both sides after dredging, at least two stifled concrete walls being arranged along roadbed slot cross section (6), the first metalling (8) being filled between the gabion collecting gutter (2) and concrete walls (6), first rubble The midline position of layer (8) upper adjacent two stifled concrete walls (6) is equipped with corrugated steel tube access (7) along the cross section of wetland road (1), The access of the corrugated steel tube access (7) is axially that oblique L-shaped is connected to wetland road (1) both sides shallow-layer water body, the corrugated steel tube Gravel is laid on access (7) into second metalling (9) contour with concrete walls (6), second metalling (9) is equipped with Bottom is fixed on the honeycomb steel structural layer (4) on concrete walls (6) top surface, and the honeycomb steel structural layer (4) is equipped with rubber Grain concrete layer (5), the rubber grain concrete layer (5) are equipped with upper subbase (3), upper subbase (3) the both sides paving If scree forms gravel substrate (10).

2. Eco-hydrological connectivity structure according to claim 1, it is characterised in that：The gravel gabion collecting gutter (2) with Wetland road (1) equal length, width 50cm, the wetland substrate of the top surface and homonymy of the gravel gabion collecting gutter (2) (11) height is identical, and the grain size of gravel in the gravel gabion collecting gutter (2) is 10~15cm.

3. Eco-hydrological connectivity structure according to claim 1, it is characterised in that：Between between the concrete walls (6) It is divided into 150~250cm, the thickness of the concrete walls (6) is 30~50cm, and the height of the concrete walls (6) is than wetland road Wetland substrate (11) the high 50cm in road (1) downstream side.

4. Eco-hydrological connectivity structure according to claim 1, it is characterised in that：The upper table of first metalling (8) Face and wetland original substrate are contour, and the gradient is identical；Ballast grain sizes in second metalling (9) are 3~5cm.

5. Eco-hydrological connectivity structure according to claim 1, it is characterised in that：The corrugated steel tube access (7) is by entering The corrugated steel tube obliquely of water end (W.E.) is formed with transverse wave fastener for connection, and the downstream of the corrugated steel tube access (7) exceeds road The upstream end nozzle of foundation trench, the corrugated steel tube access (7) is higher than wetland low water level water surface elevation.

6. Eco-hydrological connectivity structure according to claim 5, it is characterised in that：The corrugated steel tube access (7) is axial Camber, the transverse wave lengths of steel pipes tube bottom and wetland of the corrugated steel tube access (7) after the completion of ground residual settlement are set Original substrate absolute altitude is identical and the gradient is identical.

7. Eco-hydrological connectivity structure according to claim 1, it is characterised in that：The honeycomb steel structural layer (4) is tool It is the carbon steel sheet of 3cm thickness, the bee to have the steel framework rack-layer of cellular porosity, the surface and bottom surface of the honeycomb steel structural layer (4) It is the honeycomb body structure that multilayer corrugated steel plate is constituted among nest steel structural layer (4).

8. Eco-hydrological connectivity structure according to claim 1, it is characterised in that：The rubber grain concrete layer (5) Thickness be 50~80cm.

9. Eco-hydrological connectivity structure according to claim 5, it is characterised in that：The corrugated steel tube access (7) it is upper It swims end pipe mouth and is equipped with steel grid double-edged fine-toothed comb, the aperture of the steel grid double-edged fine-toothed comb is 10cm；Rubble grain in the gravel substrate (10) Diameter is 5~10cm.

10. Eco-hydrological connectivity structure according to claim 7, it is characterised in that：The thickness of the honeycomb steel structural layer (4) Degree is 30~50cm, and the hole of the honeycomb steel structural layer (4) is 3~5cm.