CN210827356U - Non-clogging ecological permeable dam - Google Patents
Non-clogging ecological permeable dam Download PDFInfo
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- CN210827356U CN210827356U CN201921363157.5U CN201921363157U CN210827356U CN 210827356 U CN210827356 U CN 210827356U CN 201921363157 U CN201921363157 U CN 201921363157U CN 210827356 U CN210827356 U CN 210827356U
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Abstract
The utility model relates to a stifled ecological permeable dam of not silting up, include: the device comprises a trapezoidal ecological permeable dam, a sludge discharge channel, a sludge conveying gallery, a sludge discharge well, a sludge discharge gate, a river channel density flow control gate and a sludge discharge pool; the dam body construction base surface of the trapezoidal ecological permeable dam is built into a V shape, and a sludge discharge channel is arranged at the bottom of the V shape; the mud conveying gallery is arranged on the bank side of the downstream side of the ecological permeable dam, one end of the mud conveying gallery is connected with the mud discharging channel, and the other end of the mud conveying gallery is connected with the mud discharging well; the mud discharging well is arranged at the outlet of the mud conveying gallery, the mud discharging gate is arranged on the downstream side face of the bottom of the mud discharging well, the river channel density flow control gate is arranged on the middle upper portion of the mud discharging well, and the mud discharging pool is arranged on the downstream side of the outlet of the mud discharging gate. The utility model discloses an utilize river course abnormal gravity flow phenomenon to continuously discharge silt, make ecological permeable dam can continuously discharge mud, reduce mud and stifled to the silting up of permeable dam, reach a satisfied service life.
Description
Technical Field
The utility model relates to an ecological permeable dam construction field among the leading storehouse quality of water clean system in lake storehouse, concretely relates to stifled ecological permeable dam of not silting up.
Background
The density flow is a relative movement of two or more fluids which have different specific gravities and can be mixed with each other, and the relative movement is caused by the difference of the specific gravities. I.e. a flow that does not undergo global intermixing with other fluids during flow if one fluid flows in the direction of the interface. For water flow, the main factors causing density differences are: sand content, water temperature, solute content. The density flow formed by the water flow carrying silt is called muddy water density flow, the muddy river water flowing into the reservoir forms tongue-shaped water flow and submerges into the reservoir bottom, and the muddy river water moves forwards along the reservoir bottom under the reservoir clear water to form reservoir density flow; the two rivers are intersected, and when the sand content of the water flow is different, the layered movement phenomenon can be generated at the junction to form river channel density flow.
According to the analysis of the measured data, the internal motion characteristics of the river water flow and the space-time distribution of motion elements are quite complex, and the change rule of the elements such as the thickness, the average flow velocity, the average sand content and the like of the density flow along the river shows that when the river becomes narrow, the thickness, the flow velocity, the sand content and the particle size of the density flow are increased; and conversely exhibits a gradual decrease. Under proper conditions, the movement law of the density flow silt of the river channel is controlled by regulating and controlling the layered flow velocity and flow of the river channel, so that a better effect of separating the silt and other pollutants in the river water is obtained.
In the lake and reservoir preposition reservoir sewage treatment and water quality purification system, the ecological permeable dam controls the seepage velocity of the water, the upstream water level is blocked up by the permeable dam, the river channel basic flow quantity is stored in front of the dam to reach a certain height, the hydraulic retention time of the upstream incoming water is prolonged, and the water quality is purified by the action of sedimentation, aquatic organism absorption, microbial degradation and the like of pollutants in the water.
The permeable dam is built by one or more strong permeable materials such as rockfill, gravel pebble or gravel reverse filtration, biological matrix and the like, and the damming material is compacted after being filled and paved in a sub-division and layered mode, wherein the compaction degree generally reaches 0.65-0.75, so that the dam body keeps the permeability stability.
Practice shows that the ecological permeable dam has the advantages of simple structure, locally available materials, low construction cost and obvious water purification effect, but the clogging problem of the ecological permeable dam is not solved all the time, and the application of the ecological permeable dam technology is disturbed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the method has the advantages that silt is continuously discharged by utilizing the phenomenon of channel density flow, the damming structure and the construction method of the ecological permeable dam are improved, the occurrence of silting is reduced, the percolation function period of the permeable dam is prolonged, and the silting problem of the permeable dam is thoroughly solved.
The technical scheme of the utility model:
an ecological permeable dike without silting up, comprising: the device comprises a trapezoidal ecological permeable dam, a sludge discharge channel, a sludge conveying gallery, a sludge discharge well, a sludge discharge gate, a river channel density flow control gate and a sludge discharge pool;
the dam body construction base surface of the trapezoidal ecological permeable dam is built into a V shape, and a sludge discharge channel is arranged at the bottom of the V shape; the mud conveying gallery is arranged on the bank side of the downstream side of the ecological permeable dam, one end of the mud conveying gallery is connected with the mud discharging channel, and the other end of the mud conveying gallery is connected with the mud discharging well; the mud discharging well is arranged at the outlet of the mud conveying gallery, the mud discharging gate is arranged on the downstream side face of the bottom of the mud discharging well, the river channel density flow control gate is arranged on the middle upper portion of the mud discharging well, and the mud discharging pool is arranged on the downstream side of the outlet of the mud discharging gate.
Furthermore, the dam body of the trapezoidal ecological permeable dam adopts one or more than two strong permeable materials such as rockfill, gravel pebble or gravel reverse filtration, biological matrix and the like, and is compacted after being filled and paved in a partition and layering way, and the compaction degree reaches 0.65-0.75, so that the dam body keeps the permeability stability.
Furthermore, a trapezoidal ecological permeable dam foundation surface is built into a V shape, an excavated foundation surface is compacted by rolling, concrete protection is adopted to facilitate flowing mud to flow, a mud discharge channel is arranged at the bottom of the V shape, a sieve-hole-shaped mud inlet hole is arranged at the top of the mud discharge channel, and the aperture is not less than 50 mm; the longitudinal slope of the sludge discharge channel is not less than 1.0%; the size of the section of the sludge discharge channel meets the requirements of sludge conveying, overhauling and maintenance.
Furthermore, the longitudinal slope of the mud conveying gallery is determined according to the topographic longitudinal slope at the axis of the mud conveying gallery, and is not less than 5.0% or steeper, and the section size of the mud conveying gallery meets the requirements of mud conveying, overhauling and maintenance.
Furthermore, the mud discharge gate is arranged on the downstream side face of the bottom of the mud discharge well, and the mud discharge gate is opened to discharge silt in the mud discharge channel and the mud discharge gallery to a mud discharge pool.
Furthermore, the outlet of the river channel density flow control gate faces the river channel main groove, and the flow velocity and the flow of the river channel density flow through the dam are adjusted.
Furthermore, the size of the sludge discharge tank is determined according to the sludge discharge amount, the sludge discharge period, the sludge-water consolidation, the dredging transfer period and the like, and a sludge discharge tank overflow weir is arranged on the sludge discharge tank so as to discharge supernatant water in the sediment.
Furthermore, the trapezoidal ecological permeable dam consists of a dam shell rockfill area, a dam body reverse filtration area and a dam body filtration material area.
A construction method of an ecological permeable dam without clogging comprises the following steps:
the method comprises the following steps of firstly, selecting a position with a narrow riverbed at the tail end of a riverway and a large topographic height difference as a dam site of an ecological permeable dam;
secondly, excavating the base plane of the trapezoidal ecological permeable dam into a V shape, rolling and compacting the foundation surface of the foundation rock soil to meet the requirements of bearing capacity and stability of the foundation, and protecting the V-shaped slope surface with concrete to facilitate flowing mud to flow;
thirdly, arranging a sludge discharge channel at the bottom of the V shape, wherein the section size of the channel meets the requirements of sludge conveying, overhauling and maintenance, and the longitudinal slope of the sludge discharge channel is not less than 1.0%; the top of the channel is provided with a sieve-hole-shaped mud inlet, and the aperture is not less than 60 mm;
fourthly, building a permeable dam by adopting one or more than two strong permeable materials such as rockfill, gravel and cobble reverse filtration, biological matrix and the like, wherein the building materials are compacted after being subjected to partition and layered filling and paving, and the compaction degree reaches 0.65-0.75, so that the dam body keeps the permeability stability;
fifthly, constructing a mud conveying gallery on the bank side of the downstream side of the trapezoidal ecological permeable dam, wherein one end of the mud conveying gallery is connected with a mud discharging channel at the bottom of the ecological permeable dam, and the other end of the mud conveying gallery is connected with a mud discharging well;
sixthly, constructing a sludge discharge gate at the downstream side of the bottom of the sludge discharge well, arranging a sludge discharge pool at the outlet of the sludge discharge gate, and arranging a sludge discharge pool overflow weir on the sludge discharge pool;
and seventhly, building a river channel density flow control gate at the middle upper part of the sludge discharge well, and adjusting the flow velocity and flow of the river channel density flow in front of the dam to obtain the optimal sludge discharge timeliness.
The utility model discloses the positive effect who has is:
the utility model aims at providing a non-silting ecological permeable dam and a construction method thereof; the ecological permeable dam can continuously discharge sludge by utilizing the phenomenon of channel density flow, thereby reducing the sludge blockage of the permeable dam and achieving a satisfactory service life.
At present, a sludge discharge process is not considered in the construction of the permeable dam, pollutants in a river water body are continuously accumulated in the dam body while being percolated and purified by the permeable dam, and the permeable passage is blocked by the pollutants as long as the day, so that the percolation function of the permeable dam is lost. The service life of the constructed permeable dam is more than 4-5 years, the service life is longer and can be prolonged to 6-7 years, and the design service life of more than 10 years is far from being reached. The utility model discloses an improve the structure of damming and the construction technology of ecological permeable dam, utilize river course density flow phenomenon to continuously discharge silt, reduce the emergence of silting up, the infiltration functional phase of extension permeable dam can thoroughly solve the stifled problem of silting up of permeable dam.
Drawings
FIG. 1 is a plan view of an ecological permeable dam construction process;
FIG. 2 is a view of an elevation of an ecological permeable dam construction process;
in the figure: 1-ecological permeable dam; 1-1 dam rock-fill body, 1-2 dam body inverted filter body and 1-3 dam body filter material; 2-a sludge discharge channel; 2-1, a mud inlet hole; 3-a mud conveying gallery; 4-a mud draining well; 5-a mud discharge gate; 6-river channel density flow control gate; 7-a sludge discharge tank; and 7-1, arranging a mud pool overflow weir.
Detailed Description
In order to further understand the contents, features and functions of the present invention, some contents are shown, and specific implementation methods (not limited to the above) are illustrated, and the following detailed descriptions are given:
as shown in fig. 1-2, a certain reservoir basin has 4 main riverways, wherein the east branch has heavy surface source pollution, in order to solve the problem that the surface source pollutants in the reservoir basin directly enter the reservoir, the end of the branch basin, namely the inlet of the riverway, is planned to be arranged at the inlet of the riverway, an ecological permeable dam is built by utilizing a reservoir water level falling zone, the upstream water level is blocked by the permeable dam to form a preposed reservoir, the base flow of the riverway is stored in front of the dam to reach a certain height, the hydraulic retention time is prolonged, and the pollutants in the water purify the water quality through the actions of sedimentation, aquatic organism absorption, microbial degradation and the like.
River channel base flow water quality index: river channel base flow 0.15m3And/s, the daily average SS content is 55mg/L, the annual bed load sand conveying amount is 0.6 ten thousand t/a, and the bed load is not conveyed to a warehouse at ordinary times during the flood period flood warehousing period.
The method comprises the steps of topographic and geological conditions that two sides of a riverbed at a warehousing river mouth are asymmetric U-shaped bealock, a mountain body on a left side is weakly weathered amphibole, a rock body is relatively complete, a right side is gentle, the surface layer is generally soil and coarse sand of 30-50 cm, completely weathered granite is arranged below the bealock, a main riverbed is close to the mountain body on the left side of the riverbed, a flood plain is a sand extraction processing plant, the surface layer is fine sand and loam of 1-2 m, the lower part is a sand gravel layer, pebbles are grey, the content of the pebbles is 40-70%, the particle size is generally 3-15 cm, the mill circle is medium, the sand is mainly coarse sand, the permeability coefficients of dense, gravel sand, coarse sand and sandy pebbles are respectively 2 × 10-4cm/s、5×10-2cm/s、8×10-2cm/s、1.3×10-1cm/s. The gravel pebble reserves in the local river channel are rich, and the project construction requirements can be met.
And (3) analysis: the design of the ecological permeable dam comprises site selection, dam building material selection, hydraulic retention time determination, seepage water quantity determination, aquatic plant construction, permeable dam anti-clogging, sludge disposal and the like, and the contents of plane and vertical surface structure arrangement, process flow and the like are completed according to the topographic conditions of a field area. The following describes the specific implementation method of the present embodiment, only in terms of the present invention.
Firstly, determining the dam site of an ecological permeable dam 1. The annual average water storage level of the reservoir is 50.5m, the normal water storage level of the reservoir is 58.5m, the fall is 8.0m, the river reach is 1.5km, two banks of a riverbed at a riverentrance are asymmetric U-shaped beaks, and the elevation is about 50.5 m. In order to fully utilize the water level drop of the reservoir water level change area, the landform condition of the bealock is scientifically and reasonably utilized, and the upstream side of the bealock is selected as the dam address of the ecological permeable dam.
And secondly, a treatment process of the base surface of the ecological permeable dam 1 is built. And (3) compacting the whole dam foundation, wherein the compactness is not less than 0.7, so that the dam foundation meets the requirements of bearing capacity and stability of the foundation. The center line or the side close to the upstream of the ecological permeable dam 1 is used as an axis, the base plane of the ecological permeable dam 1 is excavated into a V-shaped slope (asymmetric), the slope gradient is about 1:10, so that the sludge is favorably flushed to the downstream by the seepage water flow of the dam body, and the V-shaped slope is protected by concrete so as to be favorable for flowing sludge.
And thirdly, arranging a process for the sludge discharge channel 2. Arranging a sludge discharge channel 2 at the bottom of the V-shaped dam foundation, ensuring that people do not enter the sludge discharge channel 2, determining the section size of the channel according to the requirement of dredging equipment, and ensuring that the longitudinal slope of the sludge discharge channel 2 is not less than 1.0%; the top of the sludge discharge channel 2 is provided with a sieve-mesh sludge inlet 2-1 with the aperture not less than 60 mm. When water flows through the ecological permeable dam 1, the intercepted sludge continuously enters the sludge discharge channel 2 through the sludge inlet holes 2-1.
And fourthly, building the dam body of the ecological permeable dam 1. One or two or more than two strong water permeable materials of piled stones, gravel and pebble or broken stones are filtered reversely, and biological matrixes are used as the damming materials, the damming materials are compacted after being filled and paved in a sub-division and layered mode, and the compaction degree reaches 0.65-0.75. When the river channel is subjected to over-standard flood, in order to prevent the dam crest of the ecological permeable dam 1 from overflowing and scouring the dam body, lead wire mesh gabion protection is arranged in a certain range at the dam crest, the downstream dam slope and the downstream dam foot of the ecological permeable dam 1, so that the dam body keeps stable permeation. The trapezoidal ecological permeable dam 1 is composed of a dam shell rockfill body 1-1, a dam body inverse filter body 1-2 and a dam body filter body 1-3, and is filled in a partitioned mode and compacted in a layered rolling mode.
And fifthly, setting a sludge conveying corridor. A river-oriented mud conveying gallery 3 is built at one end (or two ends) of a mud discharging channel at the bottom of the ecological permeable dam 1, one end of the river-oriented mud conveying gallery is connected with a mud discharging channel 2 at the bottom of the ecological permeable dam 1, the other end of the river-oriented mud conveying gallery is connected with a mud discharging well 4, the section size of the river-oriented mud conveying gallery 3 is slightly larger than that of the mud discharging channel 2 at the bottom of the ecological permeable dam 1, so that mud can be discharged conveniently, and a longitudinal slope can be determined according to a riverbed longitudinal slope and is generally steep.
And sixthly, setting a process for the sludge discharge gate 5. The bottom of the mud discharging well 4 is provided with a mud discharging gate 5, the mud discharging gate 5 is timely opened to discharge mud according to the accumulation condition of the mud in the mud conveying gallery 3 and the mud discharging channel 2, and a mud discharging pool 7 for treating a mud pool is arranged at the outlet of the mud discharging gate 5.
And seventhly, setting a process for the river channel density flow control gate 6. And (3) building a river channel density flow control gate 6 at the middle upper part of the mud discharging well 4, and adjusting the flow velocity and flow of the river channel density flow in front of the dam.
In order to enable the density flow control gate to achieve automatic and intelligent response, a river density flow state monitor and observation devices such as water level, flow, water quality and the like are arranged at the upstream river channel, a front-end reservoir and the like of the ecological permeable dam 1; sludge accumulation observing devices are arranged at proper positions of the sludge discharge channel 2 and the sludge conveying gallery 3; arranging observation devices for water level, seepage water quantity, water quality and the like at the downstream of the backwater dam; and the ecological permeable dam 1 is internally provided with appearance devices such as seepage infiltration lines, seepage deformation, dam stress strain and the like, and the surface of the ecological permeable dam 1 is provided with appearance devices such as horizontal displacement, sedimentation and the like. Automatically acquiring related data, transmitting the data to a central cloud control platform, and accurately controlling the seepage speed and the seepage water quantity of the ecological permeable dam 1 by using the opening degree of the density flow control gate through cloud computing analysis to acquire the optimal sludge discharge timeliness.
After the ecological permeable dam 1 is built according to the process, the river water flow and the flow velocity of the ecological permeable dam 1 are adjusted through the river channel density flow control gate 6, which substantially adjusts the dam-crossing seepage capability of river channel density flow silt, pollutants and the like, so that the pollutants such as the silt in the river water body continuously enter the sludge discharge channel 2, the pollutants are greatly reduced and even are not accumulated in the dam body of the ecological permeable dam 1, and the sustainable operation of the ecological permeable dam 1 is ensured.
Other construction contents of ecological permeable dam 1, for example, hydraulic retention time, aquatic plant, mud are dealt with and set up conventional design and construction technology such as observation wellhole on mud discharging channel 2 and mud conveying corridor 3, the utility model discloses no longer describe repeatedly.
The above-mentioned examples are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention should not be limited by the examples, i.e. all equivalent changes or modifications made by the spirit of the present invention are still within the scope of the present invention.
Claims (6)
1. An ecological permeable dam without silting up, comprising: the device comprises a trapezoidal ecological permeable dam (1), a sludge discharge channel (2), a sludge conveying gallery (3), a sludge discharge well (4), a sludge discharge gate (5), a river channel density flow control gate (6) and a sludge discharge pool (7);
the dam body of the trapezoidal ecological permeable dam (1) is built into a V-shaped base surface, and a sludge discharge channel (2) is arranged at the bottom of the V-shaped base surface; the mud conveying gallery (3) is arranged on the bank side of the downstream side surface of the ecological permeable dam (1), one end of the mud conveying gallery is connected with the mud discharging channel (2), and the other end of the mud conveying gallery is connected with the mud discharging well (4); the mud discharging well (4) is arranged at the outlet of the mud conveying gallery (3), the mud discharging gate (5) is arranged on the downstream side face of the bottom of the mud discharging well (4), the river channel density flow control gate (6) is arranged on the middle upper portion of the mud discharging well (4), and the mud discharging pool (7) is arranged on the outlet downstream side of the mud discharging gate (5).
2. The non-clogging ecological permeable dam according to claim 1, characterized in that the trapezoidal ecological permeable dam (1) is protected by concrete, the top of the sludge discharge channel (2) is provided with a sieve-hole-shaped sludge inlet hole (2-1), and the diameter of the hole is not less than 50 mm; the longitudinal slope of the sludge discharge channel (2) is not less than 1.0 percent.
3. The non-clogging ecological permeable dam according to claim 1, characterized in that the longitudinal slope of the mud conveying corridor (3) is determined by the topographic longitudinal slope at the axis of the mud conveying corridor, not less than 5.0%.
4. The non-clogging ecological permeable dam according to claim 1, characterized in that the outlet of said river channel density flow control gate (6) faces the main channel of the river channel.
5. The non-clogging ecological permeable dam according to claim 1, characterized in that said sludge discharge tank (7) is provided with a sludge discharge tank overflow weir (7-1).
6. The non-clogging ecological permeable dam according to claim 1, characterized in that the dam body of the trapezoidal ecological permeable dam (1) is divided into a dam shell rockfill area (1-1), a dam body reverse filtration area (1-2) and a dam body filtrate area (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921363157.5U CN210827356U (en) | 2019-08-21 | 2019-08-21 | Non-clogging ecological permeable dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921363157.5U CN210827356U (en) | 2019-08-21 | 2019-08-21 | Non-clogging ecological permeable dam |
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| Publication Number | Publication Date |
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| CN210827356U true CN210827356U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921363157.5U Active CN210827356U (en) | 2019-08-21 | 2019-08-21 | Non-clogging ecological permeable dam |
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| CN (1) | CN210827356U (en) |
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- 2019-08-21 CN CN201921363157.5U patent/CN210827356U/en active Active
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