CN211113444U - Ecological protective structure of riverway bank slope under unfavorable geological conditions - Google Patents
Ecological protective structure of riverway bank slope under unfavorable geological conditions Download PDFInfo
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- CN211113444U CN211113444U CN201921351251.9U CN201921351251U CN211113444U CN 211113444 U CN211113444 U CN 211113444U CN 201921351251 U CN201921351251 U CN 201921351251U CN 211113444 U CN211113444 U CN 211113444U
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Abstract
The utility model provides a river course bank slope ecological protection structure under unfavorable geological conditions, which comprises a bank slope protection area and an ecological improvement area; the bank slope protection area is composed of supporting piles, backfill block stones and backfill grading stones, and the ecological improvement area is composed of an ecological plant planting bed and ecological plants. The utility model discloses can guarantee that the bank slope is stable, improve the local water ecology in river course, improve river self-purification ability, prolong sewage treatment cycle, reduce sewage treatment cost.
Description
Technical Field
The utility model relates to an ecological protective structure of river course bank slope under unfavorable geological conditions.
Background
The urban river channel is not only a channel for flood control and drainage, but also an important component of urban landscape and an ecological system, and is also an important link for realizing water and harmony of people. The normal urban river course is along with the development of time and city economy, because the emission of industrial waste water, municipal sewage and the non-point source pollutant of river course both sides during the rainfall to and the people are emptyd rubbish or the exogenous pollutant that naturally drifts off in the river course constantly deposits, lead to the silt layer of urban river course bottom pollution constantly thickening, the turbidity of the water body in the river course becomes dark gradually simultaneously, has produced black and odorous silt and black and odorous water body promptly. On one hand, the black and odorous water can poison aquatic organisms, and on the other hand, the black and odorous water can pollute air around a river channel. In addition, silt siltation can also cause river channel water sections to decrease, resulting in a decrease in river channel flood control capacity. Therefore, after the black and odorous sludge generated in the urban river is deposited, the river is required to be subjected to environment-friendly dredging in time, and the normal function of the river is recovered.
If the soil quality of the urban river bank slope foundation is unfavorable geological conditions such as sludge or mucky soil layer and the like, when black and odorous sludge in the river is removed, the bank slopes on the two banks of the river are easily damaged such as instability, collapse, settlement and the like. The main factors of the damage such as instability, collapse, subsidence and the like of bank slopes on two sides of the river channel caused by the dredging process are as follows:
(1) the foundations of river channels and bank slopes on both sides in coastal cities and river cities are mostly marine environment sedimentary facies and continental environment sedimentary facies, and geological layers are mostly unfavorable geological soil layers such as silt or mucky soil. The silt or the mucky soil has poor permeability, high compressibility, low shear strength and strong thixotropy, and can easily generate thixotropy or liquefaction when being disturbed by the outside to cause damages such as instability, collapse, subsidence and the like of bank slopes on two sides of the river channel.
(2) The barricade basis of the river course both sides bank slope in coastal, the river city district is weak, mostly mound build dyke or rock-fill build wall and build, and the basis of a lot of barricades is in on the riprap body, and the lower part soil layer of the riprap body is silt texture layer, and the factor of safety of the river course both sides barricade is low, at river course desilting in-process, receives the exogenic action, and the easy destruction such as unstability, collapse, subsidence of taking place of river course both sides bank slope.
(3) The foundation soil of the river channel bottom and the bank slopes on the two sides of the river channel is mucky soil, and in the process of drainage and desilting operation, the mud flowing at the slope foot of the bank slope can take away the earthwork with the stable and anti-slip effect on the bank slope, so that the anti-slip safety coefficient of the bank slopes on the two sides of the river channel is reduced, and the bank slopes on the two sides of the river channel are easy to lose stability, collapse, sink and the like.
(4) When the urban river adopts a dry dredging method, cofferdams need to be built at the upstream and the downstream of a dredging river section, and river water between the cofferdams needs to be dried side by side. In the drainage process, the water level in the river channel is reduced, so that the seepage force in the slope soil bodies of the two banks of the river channel is increased, the downward sliding force acting on the bank slope is increased, the anti-sliding force is reduced, the anti-sliding safety coefficient is gradually reduced, and the damages such as instability, collapse, subsidence and the like of the bank slope of the river channel are easily caused.
(5) In the mechanical dredging process, the insertion and lifting of a mechanical bucket in sludge or the hydraulic impact of a high-pressure water gun can cause the fluctuation and fall of the thin sludge, the bank slopes on the two sides of the river channel can be subjected to the impact force of sludge slurry and the action of negative-pressure dragging force, and the bank slopes on the two sides of the river channel can be damaged by instability, collapse, settlement and the like.
The above factors can cause instability, collapse, subsidence and other phenomena of bank slopes on two sides of the river channel, and the bank slope collapse can cause unsafe phenomena such as cracking and the like of buildings on the two sides of the river channel due to dense arrangement of the buildings on the two sides of the urban river channel, so that the safety of personnel and property is endangered, and great economic loss is caused. Therefore, aiming at the urban river channel with unfavorable geological conditions, a reliable supporting structure is reasonably arranged before dredging, and the stability of bank slopes on two sides of the river channel is ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a river course bank slope ecological protection structure under unfavorable geological conditions can guarantee that the bank slope is stable, improves the local water ecology in river course, improves river self-purification ability, prolongs sewage treatment cycle, reduces sewage treatment cost. Therefore, the utility model adopts the following technical scheme:
a river course bank slope ecological protection structure under unfavorable geological conditions is characterized by comprising a bank slope protection area and an ecological improvement area;
the bank slope protection area is composed of supporting piles, backfill block stones and backfill grading stones, and the ecological improvement area is composed of an ecological plant planting bed and ecological plants.
Further, the supporting piles are driven into the river channel by the walking type pile driving equipment. The support piles are driven into the river channel at the normal water level, so that the anti-sliding force is provided for the bank slope of the river channel, and the bank slope of the river channel is prevented from being damaged by instability, collapse, settlement and the like.
Furthermore, backfill rock block is located between a support pile and a bank slope, backfill thickness is not less than 30cm, the slope is in the river channel direction, and with the cooperation of the support pile, damage such as instability, collapse and settlement of the river channel bank slope is prevented, and the backfill rock block is also used for providing a planting platform of ecological plants.
Further, the ecological plant planting bed layer is paved on the surface layer of the planting platform provided by the backfilled rock blocks.
Furthermore, the ecological plants are planted in an ecological plant planting bed arranged on the surface layer of the backfilled rock block.
Furthermore, the ecological plant is used for improving the local water ecology of the river channel, improving the self-purification capacity of river water, prolonging the dredging period of the river channel and reducing the later dredging cost.
The utility model has the advantages that:
(1) the utility model can reasonably utilize the support piles and the backfilling block stones to carry out safety protection on the bank slope; the slow drainage is adopted to provide a dry dredging condition, so that damages such as instability, collapse, settlement and the like of bank slopes on two sides of the river channel in the dredging construction process are avoided.
(2) And an ecological plant planting bed is arranged on the surface layer of the backfilling block stone, and ecological plants are planted, so that the local water ecology of the river channel is improved, the self-purification capacity of river water is improved, the sewage treatment period of the river channel is prolonged, the later-stage sewage treatment cost is reduced, and the landscape benefit is realized.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a schematic view of a support pile construction.
Fig. 3 is a schematic diagram of water pumping of a foundation pit after the construction of the support piles is completed.
FIG. 4 is a schematic view of backfilling block stones and retaining wall foundation void reinforcement.
Fig. 5 is a typical schematic diagram of the ecological supporting structure after implementation and dredging.
The reference numbers indicate that 1-1 of an upstream cofferdam, 1-2 of a downstream cofferdam, 2 of a supporting pile, 3 of a backfilling block stone, 4 of a backfilling graded stone, 5 of a bank slope retaining wall, 6 of an ecological plant planting bed, 7 of an ecological plant, 8 of a black and odorous sludge layer, 9 of a bad geological layer, 10 of an isolation layer, 11 of miscellaneous fill soil, 12 of walking type pile driving equipment, 13 of pumping and drainage equipment, 14 of left bank and right bank house buildings, B of the distance from the supporting pile to the bank slope retaining wall, and L of the driving depth of the supporting pile.
Detailed Description
The following combines the utility model discloses a work progress, right the utility model discloses carry out detailed description.
As shown in fig. 1 to 5, the utility model discloses an ecological protective structure of riverway bank slope under unfavorable geological conditions includes left bank, right bank fender pile 2, and rock block 3 is backfilled to left bank, right bank, and the backfill gradation stone material 4 at the position of coming to nothing under left bank, the right bank barricade, and left bank, right bank are backfilled rock block top layer ecological plant seedbed 6, ecological plant 7, the isolation layer 10 of backfilling behind the river course desilting.
The fender pile 2 can adopt pine stake, concrete side's stake, imitative stake of concrete or plastic steel sheet pile etc. and fender pile 2 is squeezed into the river course and is apart from bank slope barricade B position, runs through black smelly silt layer 8 to deepen the certain degree of depth of inferior part bad geological stratification 9, for providing the holding power for river course both sides bank slope, improve the stability of antiskid of river course both sides bank slope, prevent that river course bank slope from taking place the unstability, collapse, destruction such as subside, the fender pile is squeezed into the degree of depth and is calculated according to planning desilting river course both sides bank slope stability analysis and confirm.
The isolation layer 10 can be made of graded sand stone, clay and other materials and compacted, and the isolation layer 10 can isolate uncleaned black and odorous sludge from river water to prevent the bottom black and odorous sludge from polluting the river water.
Ecological improvement district includes ecological plant planting bed 6 and ecological plant 7, and ecological plant planting bed 6 sets up in backfilling stone 3 top layer, and ecological plant 7 is planted on ecological plant planting bed 6, and ecological plant 7 planted on ecological plant planting bed 6 above can improve the local water ecology of river course, improves river self-purification ability, prolongs river course sewage treatment cycle, reduces later stage sewage treatment cost to have the view benefit concurrently.
The ecological plant planting bed 6 can adopt the forms of artificial floating islands, floating beds, anti-scour treated nutrient soil layers and the like.
The ecological plant 7 can adopt emergent aquatic plants, floating leaf plants, submerged plants, water plants and the like.
As shown in fig. 2 to 5, the construction method using the ecological protection structure of the river bank slope includes the following steps:
a. constructing cofferdams 1-1 and 1-2 at the upstream and the downstream of the dredging river section, and driving a support pile 2 into the river channel at a position 3m away from the 5 butts of the retaining wall under a normal water level, wherein preferably, the construction mechanical load of the left bank and the right bank cannot exceed 15kPa during the construction of the support pile.
b. And (3) draining river water in the river reach between the cofferdams 1-1 and 1-2 to provide a dry dredging condition, wherein the drainage time is longer than 24 hours when the preferable dredging and drainage is carried out, and draining is carried out at a constant speed.
c. And removing surface sludge between the retaining wall 5 and the support piles 2, wherein the thickness of the surface sludge is preferably not more than 10 cm. And (3) backfilling the graded stone material 4 at the position of the wall foundation of the retaining wall 5 which is vacated, and backfilling block stones between the retaining wall 5 and the support piles 2, wherein the preferable thickness of the backfilling block is 30cm, when dry-type dredging is carried out after drainage of a dredging river section, a construction machine is not placed in the range of 5m away from the retaining wall on the shore top, and the road surface load beyond 5m cannot exceed 10 kPa.
d. And (3) removing the black and odorous sludge 8 between the support piles 2 to a designed height by adopting a dredging machine. During dredging construction, over-excavation is strictly forbidden, and preferably, if the over-excavation is caused by inevitable construction errors, the over-excavation is not more than 10 cm; and (4) implementing layering step by step, and performing reinforced observation on buildings on two sides of the river channel, and if the buildings are abnormal, immediately stopping construction.
f. Backfilling an isolation area 10 in the desilted river channel and compacting;
g. arranging an ecological plant planting bed 6 on the surface layer of the backfilling block stone 3 between the supporting pile 2 and the bank slope retaining wall 5, and planting ecological plants 7;
h. removing the upstream cofferdam 1-1, removing black and odorous sludge at the bottom of the upstream cofferdam 1-1, and slowly discharging water into the desilted river channel to restore the water level in the river reach to a normal water level;
i. and (4) reserving the downstream cofferdam 1-2 as an upstream cofferdam of the next dredging river reach, and then repeating the steps a-h to carry out dredging on the next river reach.
The dredging operation is carried out after the support piles are driven into the riverway to be dredged and the stone block protection feet are backfilled, so that the dredging effect and safety can be greatly improved, meanwhile, the ecological plant planting bed is arranged on the surface layer of the backfilled stone block and ecological plants are planted, the local water ecology of the riverway is improved, the self-purification capacity of river water is improved, the sewage treatment period of the riverway is prolonged, the later-stage sewage treatment cost is reduced, the economic benefit is improved, and the landscape benefit is realized. The method is particularly suitable for urban river dredging engineering with dense buildings on both sides and poor geological conditions. The method has the advantages of more thorough dredging and high safety, avoids damages such as instability, collapse, settlement and the like of bank slopes on two sides of the river channel in the dredging construction process, and reduces adverse effects on buildings on the two sides of the urban river channel.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, i.e. all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention, which is not illustrated herein.
Claims (7)
1. A river course bank slope ecological protection structure under unfavorable geological conditions is characterized by comprising a bank slope protection area and an ecological improvement area;
the bank slope protection area is composed of supporting piles, backfill block stones and backfill grading stones, and the ecological improvement area is composed of an ecological plant planting bed and ecological plants.
2. The ecological protection structure of the bank slope of the riverway under the unfavorable geological condition as recited in claim 1, wherein the supporting piles are driven into the riverway by a walking type pile driving device.
3. The ecological protection structure of the bank slope of the riverway under the unfavorable geological condition as recited in claim 1, wherein the backfill rock is located between the support piles and the bank slope, the backfill thickness is not less than 30cm, and the backfill rock slopes towards the riverway direction.
4. The ecological protection structure of the riverway bank slope under the unfavorable geological condition as claimed in claim 1, wherein the backfill rock surface layer is used for providing a planting platform for ecological plants.
5. The ecological protection structure of the riverway bank slope under the unfavorable geological condition as claimed in claim 1, wherein the ecological plant planting bed layer is paved on the surface layer of a planting platform provided by backfilled rock blocks.
6. The ecological protection structure of the riverway bank slope under the unfavorable geological condition as claimed in claim 5, wherein the ecological plants are planted in an ecological plant planting bed arranged on the surface layer of the backfill rock block.
7. The ecological protection structure of the river bank slope under the unfavorable geological condition as claimed in claim 5, wherein the ecological plants are used for improving the local water ecology of the river, improving the self-cleaning capability of river water, prolonging the dredging period of the river and reducing the later dredging cost.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921351251.9U CN211113444U (en) | 2019-08-20 | 2019-08-20 | Ecological protective structure of riverway bank slope under unfavorable geological conditions |
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| CN201921351251.9U CN211113444U (en) | 2019-08-20 | 2019-08-20 | Ecological protective structure of riverway bank slope under unfavorable geological conditions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644427A (en) * | 2019-08-20 | 2020-01-03 | 中国电建集团华东勘测设计研究院有限公司 | Ecological protection structure of river bank slope under unfavorable geological conditions and dredging method |
| CN112942411A (en) * | 2021-02-04 | 2021-06-11 | 中国水利水电建设工程咨询渤海有限公司 | Reinforcing construction method for dredging retaining wall of urban landscape river |
| CN113323060A (en) * | 2021-06-09 | 2021-08-31 | 中国水利水电第一工程局有限公司 | Floating dock type dredging platform and dredging method for narrow space |
-
2019
- 2019-08-20 CN CN201921351251.9U patent/CN211113444U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644427A (en) * | 2019-08-20 | 2020-01-03 | 中国电建集团华东勘测设计研究院有限公司 | Ecological protection structure of river bank slope under unfavorable geological conditions and dredging method |
| CN110644427B (en) * | 2019-08-20 | 2021-06-08 | 中国电建集团华东勘测设计研究院有限公司 | Ecological protection structure of river bank slope under unfavorable geological conditions and dredging method |
| CN112942411A (en) * | 2021-02-04 | 2021-06-11 | 中国水利水电建设工程咨询渤海有限公司 | Reinforcing construction method for dredging retaining wall of urban landscape river |
| CN113323060A (en) * | 2021-06-09 | 2021-08-31 | 中国水利水电第一工程局有限公司 | Floating dock type dredging platform and dredging method for narrow space |
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