CN113235523A - Construction method of river channel ecological management diversion channel - Google Patents
Construction method of river channel ecological management diversion channel Download PDFInfo
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- CN113235523A CN113235523A CN202110625725.XA CN202110625725A CN113235523A CN 113235523 A CN113235523 A CN 113235523A CN 202110625725 A CN202110625725 A CN 202110625725A CN 113235523 A CN113235523 A CN 113235523A
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- 238000010276 construction Methods 0.000 title claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 239000010865 sewage Substances 0.000 claims abstract description 54
- 239000004568 cement Substances 0.000 claims abstract description 36
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 238000009417 prefabrication Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 18
- 238000000746 purification Methods 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 16
- 210000001503 joint Anatomy 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 13
- 239000004570 mortar (masonry) Substances 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 238000010981 drying operation Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 238000007788 roughening Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 abstract 1
- 238000012876 topography Methods 0.000 abstract 1
- 230000018109 developmental process Effects 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 3
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- 238000005067 remediation Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
The invention relates to the technical field of river ecological management, in particular to a construction method of a river ecological management diversion trench. Which comprises the following steps: the cofferdam draws water, and the topography is moulded, and cement mixing pile construction, diversion canal construction establish the connection of stereoplasm revetment and diversion canal, and the construction of elevator pump well. According to the invention, the diversion channels are arranged on the two sides of the river channel, and sewage polluting the river channel is intercepted, collected and purified through the diversion channels on the two sides of the river channel, so that the ecological environment of the urban river channel is not damaged, and the regional water environment is greatly improved; constitute sealed passageway of carrying sewage between water conservancy diversion canal and the stereoplasm revetment, water conservancy diversion canal bottom sets up cement mixing stake reinforcement treatment, forms the water-stop curtain on the one hand, cuts off the seepage of groundwater, and on the other hand forms compound ground, improves the ground bearing capacity to prevent that water conservancy diversion canal later stage subsides and lead to the seepage.
Description
Technical Field
The invention relates to the technical field of river ecological management, in particular to a construction method of a river ecological management diversion trench.
Background
In the economic development and urban construction processes, the rapid urbanization process causes a large amount of domestic sewage and industrial wastewater to be discharged into rivers, the pollution problem of the rivers and lakes is increasingly highlighted, pollutants contained in a water body seriously exceed the self-purification capacity of the pollutants, and the fragmentation of water ecological functions is accelerated. Since 2015, government documents such as action plans for preventing and treating water pollution (Ten items of water), working guidelines for treating black and odorous water in cities and government departments for housing and building successively promulgate the conclusion of water treatment in China. The implementation of the river water quality improvement project is the need of implementing the relevant policies of national and local environmental protection; is a necessary means for further improving the water environment quality; the requirements of comprehensive, coordinated and unified benefits of urban society, economy and ecological environment are met; the method is an important premise for building ecological cities, is an important infrastructure for guaranteeing the quality of life of people, maintaining and promoting the economic development of cities, and has practical necessity and urgency. The urban construction, the development of economic society and the sustainable development of cities have great significance in the aspects of environment, economy and social benefits. Water body remediation engineering is very necessary to improve regional water environment requirements and to meet the requirements of national policy and regulation.
In the prior art, sewage used by residents in urban communities is directly discharged into a river channel, so that most of the river channel of the city is polluted, and the ecological environment of the whole city is influenced.
Disclosure of Invention
The applicant provides a construction method of river channel ecological management diversion channels aiming at the defects in the prior art, and the diversion channels on the two sides of the river channel intercept, collect and purify the sewage polluting the river channel, so that the ecological environment of the urban river channel is not damaged, and the regional water environment is greatly improved.
The technical scheme adopted by the invention is as follows:
the construction method of the river ecological management diversion canal comprises the following steps:
the method comprises the following steps: pumping water from the cofferdam, constructing cofferdam bodies on the upstream and downstream of a river channel of a construction area, pumping water from a river channel section of the cofferdam, performing pond drying operation, and cleaning garbage sundries and sludge in the river channel after the pond is dried to prepare for subsequent construction;
step two: performing terrain modeling, after the cofferdam pumping is finished, performing terrain correction on a construction area, selecting areas on two sides of a river channel close to hard revetments as diversion channel construction areas, correcting the elevation and the compactness of a soil body in the diversion channel construction areas, and preparing for cement mixing pile construction;
step three: the cement mixing pile construction is carried out, cement mixing piles are driven into a diversion channel construction area by cement mixing pile construction equipment, a mud core is taken to detect the strength, and after the mud core strength meets the design requirement, elevation fine correction is carried out on the pile top of the cement mixing pile, so that the height position of the pile top of the cement mixing pile meets the design requirement;
step four: leveling a diversion channel construction area, filling dry stirring mortar between the pile top of the cement stirring pile and the ground of the diversion channel area to level the diversion channel construction area, and forming a leveling layer after the dry stirring mortar is solidified to enable the diversion channel construction area to be flat and straight;
step five: constructing a diversion trench, wherein after the construction of the cement mixing pile is completed for seven days, the construction of the diversion trench is started, and a diversion trench cast-in-place process is selected according to the specific environment of a construction site to carry out the in-situ pouring of the diversion trench or a diversion trench prefabrication process is selected to carry out the prefabrication and installation of the diversion trench;
step six: constructing the connection of a hard revetment and a diversion channel, arranging butt joint sections at one end of the hard revetment facing the diversion channel and one end of the diversion channel facing the hard revetment, roughening the surfaces of the butt joint sections, binding reinforcing steel bars on roughened end surfaces, pouring concrete on the surfaces of the butt joint sections to form an impermeable layer, wherein the impermeable layer can play a role in preventing seepage and stabilizing concrete members, and the surface of the impermeable layer is coated with waterproof paint;
step seven: constructing a lifting pump well, namely constructing the lifting pump well near the downstream position of the diversion channel, arranging a lifting pump in the lifting pump well, and communicating the water inlet end of the lifting pump with the diversion channels on the two sides of the river channel through a pipeline; the outlet end of the lift pump is connected with the urban sewage pipe network through a pipeline, sewage in the diversion channel is conveyed to the urban sewage pipe network through the lift pump and is uniformly purified and filtered, or the outlet end of the lift pump is connected with the inlet end of the sewage purification device through a pipeline, the outlet end of the sewage purification device is connected with the river channel through a pipeline, the sewage in the diversion channel is conveyed to the sewage purification device through the lift pump to be purified and filtered, and the purified and filtered water is discharged into the river channel.
Further, in the second step, the ground is leveled in the central area of the river channel, a backfill soil layer is arranged, and aquatic plants are planted in the backfill soil layer, so that an underwater forest is formed, and the ecological purification capacity of river water is improved.
Furthermore, a diversion trench cast-in-place process is adopted in an area where a concrete pump truck is erected on a construction site, a cast-in-place construction section is arranged in the diversion trench construction area every fifteen meters, a diversion trench section is formed in each cast-in-place construction section through concrete pouring, a plurality of diversion trench sections are connected to form the whole diversion trench, a contraction joint is arranged between every two adjacent diversion trench sections, a water stop is arranged in each contraction joint in a sealing mode, and the water stop prevents water seepage at the position of each contraction joint and resists uneven settlement.
Further, the waterstop can adopt a rubber waterstop or a steel-edged waterstop.
Further, a diversion trench prefabrication installation process is adopted under the condition that a construction site does not have cast-in-place conditions, firstly, diversion trench prefabrication subsections are prefabricated in a prefabrication field, then the diversion trench prefabrication subsections are transported to the construction site, then the diversion trench prefabrication subsections are hoisted to a diversion trench construction area by an excavator, semicircular grouting grooves are arranged on the end surfaces of two sides of each diversion trench prefabrication subsection from top to bottom, the grouting grooves of two adjacent diversion trench prefabrication subsections are connected to form a circular grouting pore channel, high-strength micro-expansion mortar is injected into the grouting pore channel after the diversion trench prefabrication subsections are installed in place and grouting treatment is carried out, so that the two adjacent diversion trench prefabrication subsections can form rigid connection, a wet joint is arranged at the position of every 15 meters of the diversion trench prefabrication subsections, and a wet joint water stop belt is arranged at the position of the wet joint.
Furthermore, the wet joint water stop can adopt a steel edge water stop or a rubber water stop, and the water stop can play a role in stopping water and overcoming micro-settlement.
Furthermore, set up first fluviograph in the river course, set up the second fluviograph in the water conservancy diversion canal, first fluviograph and second fluviograph are connected with the controller electricity respectively, controller and elevator pump electricity are connected, when the water level position that first fluviograph records is less than the water level position that the second fluviograph records, the work is opened to controller control elevator pump, discharge the sewage in the water conservancy diversion canal, avoid the excessive income river course of sewage in the water conservancy diversion canal, when the water level position that first fluviograph records is higher than the water level position that the second fluviograph records, the work is stopped to controller control elevator pump.
Furthermore, in the sixth step, after the hard revetment and the diversion channel are connected and constructed, a sewage discharge pipe arranged on the hard revetment is communicated with the diversion channel, and sewage collected in the sewage discharge pipe is discharged into the diversion channel.
The invention has the following beneficial effects:
according to the invention, the diversion channels are arranged on the two sides of the river channel, and sewage polluting the river channel is intercepted, collected and purified through the diversion channels on the two sides of the river channel, so that the ecological environment of the urban river channel is not damaged, and the regional water environment is greatly improved; a sealed sewage conveying channel is formed between the diversion channel and the hard revetment, and a cement mixing pile is arranged at the bottom of the diversion channel for reinforcement treatment, so that on one hand, a waterproof curtain is formed to block the leakage of underground water, and on the other hand, a composite foundation is formed to improve the bearing capacity of the foundation so as to prevent the leakage caused by the later settlement of the diversion channel; the construction of the diversion trench is divided into two construction modes of cast-in-place and prefabrication according to the field condition, so that the construction adaptability of the diversion trench is ensured; the construction mode of the diversion channel ensures that the diversion channel is installed in place and blocks sewage from permeating into the ground; the invention has the advantages of low cost, long service life, reliability, stability and strong adaptability to practical use.
Drawings
Fig. 1 is a layout structure diagram of a diversion trench and a lift pump well in the first embodiment.
FIG. 2 is a diagram showing the arrangement of the lift pump well and the sewage purification apparatus according to the second embodiment.
Fig. 3 is a cross-sectional view of the flow channel of the present invention.
Fig. 4 is a schematic view of a diversion trench construction structure according to an embodiment.
Fig. 5 is a schematic view of a construction structure of a second diversion trench according to an embodiment.
Fig. 6 is a structure view of the butt joint of the diversion trench and the hard revetment.
FIG. 7 is a schematic diagram of a lift pump control.
Wherein: 1. a river channel; 2. a diversion channel; 2.1, segmenting the diversion channel; 2.2, contraction joint; 2.3, a water stop belt; 2.4, prefabricating and segmenting the diversion channel; 2.5, grouting pore channels; 2.6, wet seaming; 2.7, a wet joint water stop; 3. a lift pump; 4. a sewage pipe network; 5. a sewage purification device; 6. hard revetments; 7. backfilling the soil layer; 8. an aquatic plant; 9. stirring the piles with cement; 10. a blow-off pipe; 11. an impermeable layer; 12. a sewage discharge pipe.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The first embodiment is as follows: the method comprises the following steps:
the method comprises the following steps: the cofferdam pumps water, a cofferdam body is built on the upstream and downstream of a river channel 1 of a construction area, then the water is pumped to the river channel section of the cofferdam, the pond drying operation is carried out, garbage sundries and sludge in the river channel are cleaned after the pond drying operation, and preparation is made for subsequent construction.
Step two: performing terrain modeling, namely after the cofferdam pumping is finished, performing terrain correction on a construction area, leveling the ground in the central area of the river channel 1 and arranging a backfill soil layer 7 as shown in figure 3, and planting aquatic plants 8 in the backfill soil layer 7 to form an underwater forest and improve the ecological purification capacity of river water; meanwhile, selecting areas on two sides of the river channel, which are close to the hard revetment 6, as diversion channel construction areas, correcting the elevation and compactness of soil bodies in the diversion channel construction areas, and preparing for cement mixing pile construction.
Step three: the cement mixing pile construction, as shown in fig. 3, adopts cement mixing pile construction equipment to squeeze into cement mixing pile 9 in the diversion channel construction area, gets the mud core and detects intensity, after mud core intensity satisfies the design requirement, carries out the meticulous correction of elevation to cement mixing pile 9 pile bolck for cement mixing pile 9 pile bolck height position reaches the design requirement.
Step four: leveling a diversion channel construction area, filling dry-mixed mortar between the pile top of the cement mixing pile 9 and the ground of the diversion channel area to level the diversion channel construction area, and forming a leveling layer after the dry-mixed mortar is solidified so that the diversion channel construction area is flat and straight.
Step five: construction of the diversion trench, as shown in fig. 4, after construction of the cement mixing pile is completed for seven days, construction of the diversion trench is started, a region provided with a concrete pump truck is constructed in a construction site, a diversion trench cast-in-place process is adopted, cast-in-place construction sections are arranged in the diversion trench construction region every fifteen meters, a diversion trench section 2.1 is formed in each cast-in-place construction section through concrete pouring, and a plurality of diversion trench sections 2.1 are connected to form the whole diversion trench. The concrete adopts P8 impermeable and slightly-expanded concrete. Set up contraction joint 2.2 between two adjacent water conservancy diversion canal segmentation 2.1, contraction joint 2.2 internal seal sets up waterstop 2.3, and stagnant water 2.3 area prevents that contraction joint position department from taking place the infiltration, resists differential settlement simultaneously. The water stop 2.3 can be a rubber water stop or a steel-edged water stop.
Step six: the connection between the hard revetment 6 and the diversion canal 2 is constructed, as shown in fig. 6, butt joint sections are arranged at one end of the hard revetment 6 facing the diversion canal 2 and one end of the diversion canal 2 facing the hard revetment 6, roughening treatment is carried out on the surfaces of the butt joint sections, reinforcing steel bars are bound on the roughened end faces, then concrete is poured on the surfaces of the butt joint sections to form an impermeable layer 11, the impermeable layer 11 can play a role in preventing seepage and stabilizing concrete members, and waterproof paint is coated on the surface of the impermeable layer 11.
After the hard revetment 6 and the diversion channel 2 are connected and constructed, a sewage discharge pipe 12 arranged on the hard revetment 6 is communicated with the diversion channel 2, and sewage collected in the sewage discharge pipe 12 is discharged into the diversion channel.
Step seven: the construction of elevator pump well, the construction of elevator pump well is carried out near the low reaches position of water conservancy diversion canal 2 to set up elevator pump 3 in elevator pump well, the water inlet end of elevator pump 3 is through the water conservancy diversion canal 2 intercommunication of pipeline and river course both sides.
As shown in fig. 1, the water outlet end of the lift pump 3 is connected to the urban sewage pipe network 4 through a pipeline, and the sewage in the diversion channel 2 is delivered to the urban sewage pipe network 4 through the lift pump 3 to be purified and filtered uniformly.
When the water level of the sewage in the diversion channel 2 is higher than the water level of the river channel, pressure difference can be formed, so that the sewage in the diversion channel 2 permeates into the river channel, and the quality of river water in the river channel is influenced. Therefore, as shown in fig. 7, a first water level gauge is disposed in the river channel 1, a second water level gauge is disposed in the diversion trench 2, the first water level gauge and the second water level gauge are respectively electrically connected with the controller, the controller is electrically connected with the lift pump 3, when the water level measured by the first water level gauge is lower than the water level measured by the second water level gauge, the controller controls the lift pump 3 to start to work, so as to discharge the sewage in the diversion trench 2, thereby preventing the sewage in the diversion trench 2 from overflowing into the river channel 1, and when the water level measured by the first water level gauge is higher than the water level measured by the second water level gauge, the controller controls the lift pump 3 to stop working.
Example two: the method comprises the following steps:
the method comprises the following steps: the cofferdam pumps water, a cofferdam body is built on the upstream and the downstream of a river channel of a construction area, then the water is pumped to the river channel section of the cofferdam, the pond drying operation is carried out, and garbage, sundries and sludge in the river channel are cleaned after the pond drying operation, so that the preparation is made for the subsequent construction.
Step two: performing terrain modeling, namely after the cofferdam pumping is finished, performing terrain correction on a construction area, leveling the ground in the central area of the river channel 1 and arranging a backfill soil layer 7 as shown in figure 2, and planting aquatic plants 8 in the backfill soil layer 7 to form an underwater forest and improve the ecological purification capacity of river water; meanwhile, selecting areas on two sides of the river channel, which are close to the hard revetment 6, as diversion channel construction areas, correcting the elevation and compactness of soil bodies in the diversion channel construction areas, and preparing for cement mixing pile construction.
Step three: the cement mixing pile construction adopts cement mixing pile construction equipment to squeeze into cement mixing pile 9 in diversion canal construction area, gets the mud core and detects intensity, after mud core intensity satisfies the designing requirement, carries out the meticulous correction of elevation to cement mixing pile 9 pile bolck for cement mixing pile 9 pile bolck height position reaches the designing requirement.
Step four: leveling a diversion channel construction area, filling dry-mixed mortar between the pile top of the cement mixing pile 9 and the ground of the diversion channel area to level the diversion channel construction area, and forming a leveling layer after the dry-mixed mortar is solidified so that the diversion channel construction area is flat and straight.
Step five: the construction of the diversion trench is started after the construction of the cement mixing pile is completed for seven days, the construction of the diversion trench is started, a diversion trench prefabrication installation process is adopted under the condition that a construction site does not have a cast-in-place condition, as shown in fig. 5, firstly, diversion trench prefabrication sections 2.4 are prefabricated in the prefabrication site, then, the diversion trench prefabrication sections 2.4 are transported to the construction site, then, the diversion trench prefabrication sections 2.4 are hoisted to a diversion trench construction area by an excavator, semicircular grouting grooves are arranged on the end surfaces of the two sides of the diversion trench prefabrication sections 2.4 from top to bottom, the grouting grooves of the two adjacent diversion trench prefabrication sections 2.4 are connected to form a circular grouting hole 2.5, and high-strength micro-expansion mortar is injected into the grouting hole 2.5 after the diversion trench prefabrication sections 2.4 are installed, so that the two adjacent diversion trench prefabrication sections 2.4 can form rigid connection. The prefabricated subsection 2.4 of diversion canal sets up a wet seam 2.6 every 15 meters of positions of assembling, and wet seam 2.6 positions set up wet seam waterstop 2.7, and wet seam waterstop 2.7 can adopt steel limit waterstop or rubber waterstop, and the waterstop can play stagnant water and overcome the effect of subsiding a little.
Step six: the method comprises the steps of constructing the connection between a hard revetment and a diversion channel, arranging butt joint sections at one end of the hard revetment 6 facing the diversion channel 2 and one end of the diversion channel 2 facing the hard revetment 6 as shown in fig. 6, carrying out roughening treatment on the surfaces of the butt joint sections, binding reinforcing steel bars on the roughened end surfaces, pouring concrete on the surfaces of the butt joint sections to form an impermeable layer 11, wherein the impermeable layer 11 can play a role in preventing seepage and stabilizing concrete members, and waterproof paint is coated on the surface of the impermeable layer 11.
Step seven: the construction of a lifting pump well is carried out near the downstream position of the diversion channel, the lifting pump well is constructed, a lifting pump 3 is arranged in the lifting pump well, and the water inlet end of the lifting pump 3 is communicated with the diversion channels 2 on the two sides of the river channel through a pipeline. As shown in fig. 2, the water outlet end of the lift pump 3 is connected with the water inlet end of the sewage purification device 5 through a pipeline, the water outlet end of the sewage purification device is connected with the river channel through a pipeline, the sewage in the diversion channel 2 is conveyed into the sewage purification device 5 through the lift pump 3 for purification and filtration, and the purified and filtered water is discharged into the river channel.
When the water level of the sewage in the diversion channel is higher than the water level of the river channel, pressure difference can be formed, so that the sewage in the diversion channel permeates into the river channel, and the quality of river water in the river channel is influenced. Therefore, set up first fluviograph in the river course, set up the second fluviograph in the water conservancy diversion canal, first fluviograph and second fluviograph are connected with the controller electricity respectively, the controller is connected with the elevator pump electricity, when the water level position that first fluviograph measured is less than the water level position that the second fluviograph measured, the work is opened to the elevator pump of controller control, discharge the sewage in the water conservancy diversion canal, avoid the sewage excessive entering river course in the water conservancy diversion canal, when the water level position that first fluviograph measured is higher than the water level position that the second fluviograph measured, the work is stopped to the elevator pump of controller control.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (8)
1. A construction method of a river channel ecological management diversion canal is characterized in that: comprises the following steps of (a) carrying out,
the method comprises the following steps: water is pumped from the cofferdam, cofferdam bodies are built up on the upstream and downstream of the river channel (1) in the construction area, then water is pumped from the river channel section of the cofferdam, the pond drying operation is carried out, and garbage sundries and sludge in the river channel are cleaned after the pond is dried, so that the preparation is made for the subsequent construction;
step two: performing terrain modeling, after the cofferdam pumping is finished, performing terrain correction on a construction area, selecting areas on two sides of a river channel (1) close to a hard revetment (6) as diversion channel construction areas, correcting soil body elevation and compactness in the diversion channel construction areas, and preparing for cement mixing pile construction;
step three: the cement mixing pile construction, namely driving a cement mixing pile (9) into a diversion channel construction area by adopting cement mixing pile construction equipment, taking a mud core to detect the strength, and after the mud core strength meets the design requirement, finely correcting the elevation of the pile top of the cement mixing pile (9) to ensure that the pile top height position of the cement mixing pile (9) meets the design requirement;
step four: leveling a diversion channel construction area, filling dry stirring mortar between the pile top of the cement stirring pile (9) and the ground of the diversion channel area to level the diversion channel construction area, and forming a leveling layer after the dry stirring mortar is solidified so that the diversion channel construction area is straight;
step five: constructing a diversion trench, wherein after the construction of the cement mixing pile is completed for seven days, the construction of the diversion trench is started, and a diversion trench cast-in-place process is selected according to the specific environment of a construction site to carry out the in-situ pouring of the diversion trench or a diversion trench prefabrication process is selected to carry out the prefabrication and installation of the diversion trench;
step six: constructing connection of a hard revetment and a diversion channel, arranging butt joint sections at one end of the hard revetment (6) facing the diversion channel (2) and one end of the diversion channel (2) facing the hard revetment (6), roughening the surfaces of the butt joint sections, binding reinforcing steel bars on the roughened end surfaces, then pouring concrete on the surfaces of the butt joint sections to form an impermeable layer (11), wherein the impermeable layer (11) can play a role in preventing seepage and stabilizing a concrete member, and waterproof paint is coated on the surface of the impermeable layer (11);
step seven: the construction of a lifting pump well is carried out, the construction of the lifting pump well is carried out near the downstream position of the diversion channel (2), a lifting pump (3) is arranged in the lifting pump well, and the water inlet end of the lifting pump (3) is communicated with the diversion channels (2) on the two sides of the river channel through a pipeline; the outlet end of elevator pump (3) passes through the pipeline and is connected with urban sewage pipe network (4), sewage in water conservancy diversion canal (2) is carried in urban sewage pipe network (4) through elevator pump (3) and is all purified and filtered, perhaps the outlet end of elevator pump (3) passes through pipeline and sewage purification device (5) and intakes the end and connects, sewage purification device outlet end passes through the pipe connection river course, sewage in water conservancy diversion canal (2) passes through elevator pump (3) and carries in sewage purification device (5) purification and filtration, purify the water after filtering and discharge into in river course (1) again.
2. The construction method of the river ecological management diversion canal of claim 1, wherein: in the second step, the ground is leveled in the central area of the river channel (1), a backfill soil layer (7) is arranged, and aquatic plants (8) are planted in the backfill soil layer (7) so as to form an underwater forest and improve the ecological purification capacity of river water.
3. The construction method of the river ecological management diversion canal of claim 1, wherein: the method is characterized in that a diversion trench cast-in-place process is adopted in an area where a concrete pump truck is erected on a construction site, a cast-in-place construction section is arranged in the diversion trench construction area every fifteen meters, a diversion trench section (2.1) is formed in each cast-in-place construction section through concrete pouring, a plurality of diversion trench sections (2.1) are connected to form the whole diversion trench, a contraction joint (2.2) is arranged between every two adjacent diversion trench sections (2.1), a water stop (2.3) is arranged in each contraction joint (2.2) in a sealing mode, and the water stop (2.3) prevents water seepage at the position of each contraction joint and resists uneven settlement.
4. The construction method of the river ecological management diversion canal of claim 3, wherein: the water stop (2.3) can adopt a rubber water stop or a steel-edge water stop.
5. The construction method of the river ecological management diversion canal of claim 1, wherein: the prefabricated guide channel installation process is adopted under the condition that a construction site does not have cast-in-place conditions, firstly prefabricated guide channel prefabricated sections (2.4) are prefabricated in a prefabricated site, then the diversion trench prefabricated sections (2.4) are transported to a construction site, then the diversion trench prefabricated sections (2.4) are hoisted to a diversion trench construction area by an excavator, semicircular grouting grooves are arranged on the end surfaces of two sides of each diversion trench prefabricated section (2.4) from top to bottom, the grouting grooves of two adjacent diversion trench prefabricated sections (2.4) are connected to form a circular grouting pore canal (2.5), high-strength micro-expansion mortar is injected into the grouting pore canal (2.5) after the diversion trench prefabricated sections (2.4) are installed in place and grouting treatment is carried out, the two adjacent diversion channel prefabricated sections (2.4) can form rigid connection, a wet joint (2.6) is arranged at the position of each 15 m assembled by the diversion channel prefabricated sections (2.4), and a wet joint water stop (2.7) is arranged at the position of the wet joint (2.6).
6. The construction method of the river ecological management diversion canal of claim 5, wherein: the wet joint water stop (2.7) can adopt a steel edge water stop or a rubber water stop, and the water stop can play a role in stopping water and overcoming micro-settlement.
7. The construction method of the river ecological management diversion canal of claim 1, wherein: the river course water-level meter is characterized in that a first water level meter is arranged in the river course (1), a second water level meter is arranged in the diversion canal (2), the first water level meter and the second water level meter are respectively and electrically connected with a controller, the controller is electrically connected with the lifting pump (3), when the water level position measured by the first water level meter is lower than the water level position measured by the second water level meter, the lifting pump (3) is controlled by the controller to start to work, sewage in the diversion canal (2) is discharged, the phenomenon that the sewage in the diversion canal (2) overflows into the river course (1) is avoided, and when the water level position measured by the first water level meter is higher than the water level position measured by the second water level meter, the lifting pump (3) is controlled by the controller to stop working.
8. The construction method of the river ecological management diversion canal of claim 1, wherein: in the sixth step, after the hard revetment (6) and the diversion channel (2) are connected and constructed, a sewage discharge pipe (12) arranged on the hard revetment (6) is communicated with the diversion channel (2), and sewage collected in the sewage discharge pipe (12) is discharged into the diversion channel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625725.XA CN113235523A (en) | 2021-06-04 | 2021-06-04 | Construction method of river channel ecological management diversion channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625725.XA CN113235523A (en) | 2021-06-04 | 2021-06-04 | Construction method of river channel ecological management diversion channel |
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| CN113235523A true CN113235523A (en) | 2021-08-10 |
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| CN202110625725.XA Withdrawn CN113235523A (en) | 2021-06-04 | 2021-06-04 | Construction method of river channel ecological management diversion channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116307265A (en) * | 2023-05-12 | 2023-06-23 | 珠江水利委员会珠江水利科学研究院 | Water ecological treatment analysis decision-making method and system based on water flow model |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116307265A (en) * | 2023-05-12 | 2023-06-23 | 珠江水利委员会珠江水利科学研究院 | Water ecological treatment analysis decision-making method and system based on water flow model |
| CN116307265B (en) * | 2023-05-12 | 2023-09-01 | 珠江水利委员会珠江水利科学研究院 | Water ecological treatment analysis decision-making method and system based on water flow model |
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Application publication date: 20210810 |