CN215977107U

CN215977107U - Ecological revetment suitable for slightly polluted river

Info

Publication number: CN215977107U
Application number: CN202121336838.XU
Authority: CN
Inventors: 王洪杰; 王汝健; 刘玲; 申世刚; 张圣琦; 李梦祥
Original assignee: Hebei University
Current assignee: Hebei University
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-03-08
Anticipated expiration: 2031-06-16

Abstract

The utility model relates to an ecological revetment suitable for a slightly polluted river, which structurally comprises a plurality of layers of gabion net cages which are stacked up and down close to a river bed, wherein the top surface of the uppermost gabion net cage is lower than the water surface of river water, vertical pine piles penetrate through the uppermost gabion net cage, the lower ends of the pine piles are rammed into the river bed, the upper ends of the pine piles are higher than the water surface of the river water, the side surfaces of the lower gabion net cage are attached to the surfaces of the pine piles, and vegetation is arranged on the river bed. And one side of the plurality of gabion net cages far away from the river bank is step-shaped. The gabion net cage comprises a gabion iron net, gravels with the particle size of 100-200 mm are filled in the gabion iron net, and a backfill part is arranged between the pine pile and a river bed. The gabion net cage has three layers. The utility model combines the gabion ecological bank protection with the pine pile ecological bank protection, and greatly improves the stability and the ecological property of the river bank protection belt by a relatively cheap method.

Description

Ecological revetment suitable for slightly polluted river

Technical Field

The utility model relates to an ecological bank protection, in particular to an ecological bank protection suitable for micro-polluted rivers.

Background

Aiming at the problem that the water quality of micro-polluted rivers does not reach the standard, people develop a plurality of ecological bank protection structures in recent years, and pine pile bank protection and gabion bank protection are two common ecological bank protection types. Experiments show that the nitrogen and phosphorus removal capability of the nearby soil is greatly improved by the construction of the pine pile ecological bank protection, the plant growth condition is good, but the stability and the scouring resistance are not greatly improved, and the phenomenon of water and soil loss caused by river scouring can also happen occasionally; the stability of gabion revetment has great promotion to the revetment, but the performance in this aspect of denitrogenation ability is relatively poor to because the not good reason of gabion revetment water permeability, the vegetation condition of the near soil of revetment is relatively poor. However, no ecological bank protection capable of simultaneously and greatly improving the stability, the scour resistance and the ecological performance of the bank protection zone exists at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an ecological revetment suitable for micro-polluted rivers, and aims to solve the problem that the existing ecological revetment cannot have stability, scouring resistance and ecological property at the same time.

The utility model is realized by the following steps: the utility model provides an ecological bank protection suitable for slightly pollute river, includes a plurality of layers of gabion box with a net that stack from top to bottom near the riverbed, and the top surface that is located the gabion box with a net of top is less than the river water surface, and it has vertical pine stake to cross-under on the gabion box that is located the top, in the riverbed is tamped into to pine stake lower extreme, the upper end of pine stake is higher than the surface of water of river, and the side of the gabion box with a net of below pastes the surface of leaning on at the pine stake, is provided with the vegetation on the riverbed.

And one side of the plurality of gabion net cages far away from the river bank is step-shaped.

The gabion net cage comprises a gabion iron net, and gravels with the particle size of 100-200 mm are filled in the gabion iron net.

And a backfilling part is arranged between the pine pile and the river bed.

The gabion net cage has three layers.

The stone cage revetment and the pine pile revetment are combined, so that the ecological revetment has good stability, can resist scouring of river water and prevent water and soil loss of the ecological revetment, and meanwhile, the pine pile enables the ecological revetment to have good ecological performance, has excellent nitrogen and phosphorus removal capability and can effectively improve the water quality of slightly polluted river water.

During construction, firstly planning an area range, cleaning weeds, large broken stones, garbage and the like in a river bank protection belt, then excavating a ditch, changing the flow direction of river water, enabling no interference of the river water around the bank protection belt, and dredging the dike feet to keep the dike feet flat. Excavating the soil of the revetment zone, backfilling and compacting the soil at the lower part of the river bed after the integral excavation is finished, reserving a certain space beside the river bed to build a bottommost gabion net cage, stacking a plurality of gabion net cages above the bottommost gabion net cage, inserting the pine pile into the space reserved by the topmost gabion net cage, enabling the lower end of the pine pile to contact the river bed, and tamping the pine pile into the river bed after the insertion is finished, so that the distance between the top end of the pine pile and the upper surface of the uppermost gabion net cage is 0.5 m. After the ecological bank protection is built, river water is guided into a normal flow direction, the contact between the river water and the bank is recovered, and vegetation such as shrubs and the like is planted on the soil of the bank.

The utility model combines the gabion ecological bank protection with the pine pile ecological bank protection, and greatly improves the stability and the ecological property of the river bank protection belt by a relatively cheap method.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. a gabion cage; 2. pine piles; 3. a backfill section; 4. river water; 5. a water surface; 6. a riverbed; 7. river banks; 8. and (4) vegetation.

Detailed Description

As shown in fig. 1, the utility model comprises a plurality of layers of gabion net cages 1 which are stacked up and down close to a river bed 6, the top surface of the uppermost gabion net cage 1 is lower than the water surface 5 of river water 4, vertical pine piles 2 penetrate through the uppermost gabion net cage 1, the lower ends of the pine piles 2 are rammed into the river bed 6, the upper ends of the pine piles 2 are higher than the water surface 5 of the river water 4, the side surfaces of the lower gabion net cage 1 are attached to the surfaces of the pine piles 2, and vegetation 8 is arranged on a river bank 7.

The top gabion net cage 1 is fixed through the pine pile 2, all the gabion net cages 1 are fixed, the gabion net cage 1 is made of gravel-filled gabion iron nets, the quality of the gabion net cage 1 is large, the gabion net cage can be stably placed in river water 4, erosion of the river water 4 can be borne, and water and soil loss of a revetment is prevented.

The width of each layer of gabion net cage 1 is inconsistent, one side of the gabion net cage 1 far away from the river bank 7 is step-shaped, and except the gabion net cage 1 at the top layer, one sides of other layers of gabion net cages 1 near the river bank 7 are mutually aligned and used for being attached to the pine piles 2.

The gabion net cage 1 comprises a gabion iron net, and gravels with the particle size of 100-200 mm are filled in the gabion iron net. The gabion cage 1 has three layers. The width of the bottom layer gabion net cage 1 is approximately the same as that of the top layer gabion net cage 1, and the widths of the bottom layer gabion net cage 1 and the top layer gabion net cage are larger than that of the middle layer gabion net cage 1. One side of the middle gabion net cage 1 is aligned with one side of the lower gabion net cage 1, the other side of the middle gabion net cage 1 forms a ladder shape, the gabion net cage 1 on the top layer deviates to one side of a river bank 7, one side of the middle gabion net cage 1 and the lower gabion net cage 1 form the ladder shape, and the other side of the middle gabion net cage 1 is in contact with the river bank 7.

A gap is formed between the lower part of the top-layer gabion net cage 1 and the pine wood pile 2, so that the gap needs to be filled, and soil is backfilled between the pine wood pile 2 and a river bed 6 to form a backfilling part 3.

According to the utility model, the gabion revetment and the pine pile 2 revetment are combined, so that the ecological revetment has good stability, can resist the scouring of river water 4 and prevent the water and soil loss of the ecological revetment, and meanwhile, the pine pile 2 enables the ecological revetment to have good ecological performance, has excellent nitrogen and phosphorus removal capability and can effectively improve the water quality of slightly polluted river water 4.

During construction, firstly planning an area range, cleaning weeds, large broken stones, garbage and the like in a river bank protection belt, then excavating a ditch, changing the flow direction of river water 4, enabling no interference of the river water 4 around the bank protection belt, and dredging the dike feet to keep the dike feet flat. Excavating the soil of the revetment zone, backfilling and tamping the soil at the lower part of the river bed 6 after the integral excavation is finished, reserving a certain space beside the river bed 6 to build a bottommost gabion net cage 1, stacking a plurality of gabion net cages 1 above the bottommost gabion net cage 1, inserting the pine pile 2 into the space reserved in the topmost gabion net cage 1, enabling the lower end of the pine pile 2 to contact the river bed 6, and tamping the pine pile 2 into the river bed 6 integrally after the insertion is finished, so that the distance between the top end of the pine pile 2 and the upper surface of the uppermost gabion net cage 1 is 0.5 m. After the ecological bank protection is built, river water 4 is guided into a normal flow direction, the water surface 5 of the river water 4 is higher than the upper-layer gabion net cage 1, the contact between the river water 4 and the bank 7 is recovered, and vegetation 8 such as shrubs and the like are planted on the soil of the bank 7.

The vegetation 8 is selected from shrubs such as Hibiscus Mutabilis and Ligustrum lucidum ait, and ground cover such as Bermuda grass.

The utility model combines the gabion ecological bank protection with the pine pile 2 ecological bank protection, and greatly improves the stability and the ecology of the river bank protection belt by a relatively cheap method.

Claims

1. The utility model provides an ecological revetment suitable for slightly polluting river which characterized in that, includes a plurality of layers of gabion box with a net that stack from top to bottom near the riverbed, and the top surface that lies in the gabion box of the top is less than the river surface of water, has worn to connect vertical pine stake on the gabion box that lies in the top, pine stake lower extreme tamps into the riverbed, the upper end of pine stake is higher than the surface of water of river, and the side of the gabion box with a net of below pastes and leans on the surface at the pine stake, is provided with the vegetation on the riverbed.

2. The ecological bank protection suitable for the slightly polluted rivers according to claim 1, wherein one side, far away from the river bank, of a plurality of the gabion cages is stepped.

3. The ecological revetment suitable for the micro-polluted river according to claim 1, wherein the gabion net cage comprises a gabion iron net, and gravels with the particle size of 100-200 mm are filled in the gabion iron net.

4. The ecological bank protection suitable for the micro-polluted river as claimed in claim 1, wherein a backfill portion is provided between the pine pile and the river bed.

5. The ecological bank protection suitable for the micro-polluted rivers according to claim 1, wherein the gabion mesh cage has three layers.