Emergency treatment system for high-turbidity raw water in flood period

Abstract

The utility model relates to the field of municipal water supply and drainage, in particular to an emergency treatment system for high-turbidity raw water in a flood period, which comprises a water source, a riverbed, a percolation water collecting gallery, a booster pump station, a water conveying pipeline, a valve, a mixed flat pressing water tank, a layered water taking device, a main raw water pipeline and a water plant, the flood-period high-turbidity raw water from the layered water taking device and the low-turbidity water from the percolation water collecting gallery are treated by the mixed flat-pressing water tank, then flow into the main raw water pipeline again through the water conveying pipeline and are conveyed to a water plant for subsequent treatment. The utility model provides a new system for dealing with high-turbidity raw water in the rainstorm flood period, in the flood period, a layered water taking device is arranged in a water source area, and low-turbidity water is injected along the main raw water pipeline to reduce the overall turbidity of the high-turbidity raw water in the flood period, so that the water quality standard capable of being treated by a water plant is met. Compared with a traditional pre-sedimentation tank scheme, land can be saved, and construction, operation and maintenance cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of municipal water supply and drainage, and specifically to an emergency treatment system for high-turbidity raw water during flood season. Background Art

[0002] During rainstorms and floods, the sediment content in water sources such as reservoirs and rivers increases dramatically, causing the turbidity of raw water to soar, exceeding the operating load of water plants. In severe cases, the water plants will suffer water outages.

[0003] At present, the general practice for treating large-scale high-turbidity raw water during heavy rain and flood in China is to set up a pre-sedimentation tank at the water source or inside the water plant to reduce the turbidity of the raw water by sedimentation to the standard that the water plant can handle. The disadvantages of this treatment method are large construction funds and large land area, and it is basically idle during the non-flood season, the equipment maintenance cost is high, and the sediment in the pre-sedimentation tank is concentrated with heavy metals, and the sediment needs to be further treated, which is a complicated process. Utility Model Content

[0004] The utility model provides an emergency treatment system for raw water with high turbidity during flood season, which solves the problem that the water plant cannot perform normal treatment due to excessive turbidity of raw water during flood season at a relatively low cost.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an emergency treatment system for high-turbidity raw water during flood season, comprising a water source, wherein the water source is connected to a riverbed, an infiltration water collection gallery is buried inside the riverbed, the end of the infiltration water collection gallery is connected to a pressure pump station, the pressure pump station is connected to a mixed pressure equalizing water tank through a first water delivery pipeline, a stratified water intake device is provided at the water source, the stratified water intake device is connected to a main raw water pipeline, the main raw water pipeline is connected to a water plant, a second water delivery pipeline and a third water delivery pipeline are respectively provided on the main raw water pipeline, the second water delivery pipeline and the third water delivery pipeline connect the main raw water pipeline with the mixed pressure equalizing water tank, a first valve is provided on the main raw water pipeline, the first valve is located between the second water delivery pipeline and the third water delivery pipeline, a second valve is provided on the second water delivery pipeline, and a third valve is provided on the third water delivery pipeline.

[0007] Preferably, the stratified water intake device includes a vertical shaft, which is dug on a protruding ridge extending to a water source, and the vertical shaft is respectively dug with a surface water intake tunnel, a middle water intake tunnel and a deep water intake tunnel at different depths; the surface water intake tunnel, the middle water intake tunnel and the deep water intake tunnel are all provided with a vertical shaft water inlet, and each of the vertical shaft water inlets is provided with a control gate; the surface water intake tunnel, the middle water intake tunnel and the deep water intake tunnel extend radially toward the vertical shaft to the water source, connecting the water source with the vertical shaft water inlet; a water outlet tunnel is also opened at the bottom of the vertical shaft, and the water outlet tunnel is connected to the main raw water pipeline.

[0008] Preferably, the construction process of the stratified water intake device includes: digging a vertical shaft excavation platform on a protruding ridge extending to a water source, digging a vertical shaft at the vertical shaft excavation platform, and digging surface water intake tunnels, middle water intake tunnels and deep water intake tunnels arranged radially facing the vertical shaft at different depths of the vertical shaft, and the ends of the surface water intake tunnels, middle water intake tunnels and deep water intake tunnels connected to the water source are respectively provided with rock plugs for water blocking, and after the construction of the surface water intake tunnels, middle water intake tunnels, deep water intake tunnels and the vertical shaft is completed, the rock plugs are excavated by water operations.

[0009] More preferably, the excavation of the surface water intake tunnel, the middle water intake tunnel, the deep water intake tunnel and the vertical shaft and the removal of the rock plug all adopt a static excavation method, that is, pre-cracking excavation with a water-grinding drill.

[0010] Preferably, the infiltration water collection gallery comprises one or more thick-walled, densely perforated reinforced concrete box culverts buried side by side inside the riverbed and a sand and gravel filtration system arranged around the thick-walled, densely perforated reinforced concrete box culvert, and low turbidity water is collected through the infiltration water collection gallery (3).

[0011] Preferably, the sand and gravel filtration system adopts a coarse-fine-coarse filtration structure, and the sand and gravel filtration system is provided with a 8-32mm particle size gravel layer, a 4-8mm particle size gravel layer and a riverbed gravel layer mixed with clay particles in sequence from the bottom surface of the thick-walled, densely perforated reinforced concrete box culvert downward; the sand and gravel filtration system is provided with a 8-32mm particle size gravel layer, a 4-8mm particle size gravel layer, a 2-4mm particle size gravel layer, a 0.5-2mm medium-coarse sand layer, a 40-60mm crushed stone cushion layer and a 100-150mm large-particle size pebble layer in sequence from the top surface of the thick-walled, densely perforated reinforced concrete box culvert upward.

[0012] Preferably, the large-diameter pebble layer comprises a plurality of riverbed concrete grids, each of which is embedded with a plurality of gabion cages, and each of which is filled with large-diameter pebbles of 100 to 150 mm.

[0013] Preferably, the booster pump station is disposed at the end of the infiltration water collection gallery, and the low turbidity water collected by the infiltration water collection gallery is pressurized by the booster pump station and injected into the first water delivery pipeline.

[0014] Preferably, the first water supply pipeline is used to transport the low turbidity water collected from the infiltration water collection gallery to the mixing and equalizing water tank; the second water supply pipeline is used to transport the high turbidity raw water in the flood season in the main raw water pipeline to the mixing and equalizing water tank; the third water supply pipeline is used to transport the water treated in the mixing and equalizing water tank back to the main raw water pipeline and finally to the water plant.

[0015] Preferably, the mixing and equalizing water tank is a place for mixing and equalizing the high turbidity raw water during the flood season from the water source and the low turbidity water from the infiltration water collection corridor; the turbidity range of the high turbidity raw water during the flood season is controlled at 600NTU and below; the turbidity of the low turbidity water is controlled at 100NTU and below.

[0016] Preferably, a working method for treating high-turbidity raw water during flood season using the emergency treatment system for high-turbidity raw water during flood season comprises: closing the first valve, opening the second valve, and opening the control gate of the stratified water intake tunnel with a turbidity range of 600NTU and below, so that the high-turbidity raw water during flood season flows through the vertical shaft, the outlet tunnel, the main raw water pipeline and the second water supply pipeline in sequence and merges into the mixed equalization water tank; the low-turbidity water collected by the infiltration water collection gallery is pressurized by the pressure pump station, and then flows through the first water supply pipeline and merges into the mixed equalization water tank; after the high-turbidity raw water during flood season and the low-turbidity water are mixed and equalized in the mixed equalization water tank, the third valve is opened, and the treated water flows back into the main raw water pipeline via the third water supply pipeline and is finally transported to the water plant for subsequent treatment.

[0017] Preferably, the turbidity of raw water at different layers of the water source during the flood season is detected by an online turbidity detector and the turbidity value is displayed on the computer. When the turbidity is 600NTU or below, the computer controls and opens the control gate of the stratified water intake tunnel that meets the turbidity requirement, so that the high turbidity raw water during the flood season flows through the vertical shaft, the outlet tunnel and the main raw water pipeline in sequence and merges into the mixing and pressure-equalizing water tank.

[0018] Preferably, during the non-flood period, the working method of the emergency treatment system includes: opening the first valve, closing the second valve and the third valve at the same time, opening the control gates of the surface water intake tunnel, the middle water intake tunnel or the deep water intake tunnel according to the water quality conditions, and the water from the water source flows through the vertical shaft, the outlet tunnel and the main raw water pipeline in sequence and directly enters the water plant for subsequent treatment; more preferably, in autumn, the heavy metal content in the outlet water of the deep water intake tunnel exceeds the standard, so it is necessary to open the control gate of the surface water intake tunnel; in summer, if algae pollution breaks out in the water source, it is necessary to open the control gate of the deep water intake tunnel.

[0019] More preferably, for the source of low turbidity water, the new riverbed infiltration water extraction scheme shown in the present application can be adopted, that is, laying infiltration water collection corridors to extract water, or directly connecting to existing groundwater extraction projects to extract water.

[0020] Based on the above technical solutions, the positive effects of this application are as follows:

[0021] This application provides a new system for dealing with high turbidity raw water during rainstorms and floods, and provides a new idea for the construction of urban emergency water sources, as follows:

[0022] 1. This application adopts thick-walled, densely perforated reinforced concrete box culvert as a water collection corridor. The thick-walled box culvert has a large span and can withstand large soil pressure and water pressure. The densely perforated box culvert wall can realize large-scale water intake, thereby increasing the water treatment capacity of the emergency treatment system for high-turbidity raw water during flood season.

[0023] 2. Compared with the commonly used soil and rock backfiltration from fine particles to coarse particles along the direction of water flow, the sand and gravel backfiltration system of the infiltration water collection corridor in this application adopts a coarse-fine-coarse backfiltration structure, and absorbs the sediment in the high turbidity water by adding a crushed stone cushion layer and a large-size pebble layer. This measure reduces the risk of blockage of the backfiltration system and increases the service life of the infiltration water collection corridor. In addition, this application increases the integrity of the riverbed and prevents water scouring by embedding gabion stone cages in the riverbed concrete frame.

[0024] 3. This application adopts the method of shore shaft and layered tunnel laying. Its construction process is less restricted by the water level of the water source. It can use rock plugs to block water without draining the water in the water source to carry out construction, reduce the difficulty of construction, and achieve the purpose of layered water extraction at the water source to ensure that the water intake meets the turbidity range of water use. During the flood season, low-turbidity water is injected into the main raw water pipeline along the way to mix high and low turbidity water to reduce the overall turbidity of the raw water and reach the water quality standard that the water plant can handle. For the source of low turbidity water, the new riverbed infiltration water extraction scheme shown in this application can be adopted, that is, infiltration water collection corridors are laid in the riverbed to extract water, or it can be directly connected to the existing groundwater extraction project to extract water. Compared with the traditional pre-sedimentation tank scheme, it can save land and reduce construction, operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 This is a schematic diagram of the emergency treatment system for high turbidity raw water during the flood period in this application;

[0027] Figure 2 This is a schematic diagram of the structure of the stratified water intake device in this application;

[0028] Figure 3 This is a structural schematic diagram of a thick-walled, densely perforated reinforced concrete box culvert in this application;

[0029] Figure 4 This is a schematic diagram of the cross section of the riverbed in this application;

[0030] Figure 5 A top view of the riverbed surface in this application;

[0031] Explanation of the reference numerals: 1-water source; 2-riverbed; 3-infiltration water collection corridor; 4-boosting pump station; 5-first water pipeline; 6-mixing pressure-equalizing tank; 7-stratified water intake device; 8-main raw water pipeline; 9-water plant; 10-second water pipeline; 11-third water pipeline; 12-first valve; 13-second valve; 14-third valve; 15-thick-walled densely perforated reinforced concrete box culvert; 16-sand and gravel filtration system; 17-vertical shaft; 18-surface water intake tunnel; 19-middle water intake tunnel ; 20-deep water intake tunnel; 21-shaft water inlet; 22-control gate; 23-water outlet tunnel; 24-8~32mm gravel layer; 25-4~8mm gravel layer; 26-riverbed sand and gravel layer mixed with clay particles; 27-2~4mm gravel layer; 28-0.5~2mm medium-coarse sand layer; 29-crushed stone cushion layer; 30-large-size pebble layer; 31-riverbed concrete frame; 32-gabion stone cage; 33-rock plug; 34-ridge; 35-shaft excavation platform. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present application to achieve the intended application purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0033] Reference Figure 1-Figure 5As a specific embodiment of the present application, an emergency treatment system for high-turbidity raw water during flood season includes a water source 1, the water source 1 is connected to a riverbed 2, an infiltration water collection gallery 3 is buried inside the riverbed 2, the end of the infiltration water collection gallery 3 is connected to a pressure pump station 4, the pressure pump station 4 is connected to a mixed pressure equalization tank 6 through a first water delivery pipeline 5, the water source 1 is provided with a stratified water intake device 7, the stratified water intake device 7 is connected to a main raw water pipeline 8, and the main raw water pipeline 8 is connected to a water plant 9 The main raw water pipeline 8 is provided with a second water pipeline 10 and a third water pipeline 11, respectively. The second water pipeline 10 and the third water pipeline 11 connect the main raw water pipeline 8 and the mixed pressure-equalizing water tank 6. The main raw water pipeline 8 is provided with a first valve 12, and the first valve 12 is located between the second water pipeline 10 and the third water pipeline 11. The second water pipeline 10 is provided with a second valve 13, and the third water pipeline 11 is provided with a third valve 14. The booster pump station 4 is provided at the end of the infiltration water collection gallery 3, and the low turbidity water collected by the infiltration water collection gallery 3 is pressurized by the booster pump station 4 and the low turbidity water is injected into the first water pipeline 5. The low turbidity water collected from the infiltration water collection gallery 3 is transported to the mixing and equalizing water tank 6 through the first water delivery pipeline 5; the high turbidity raw water in the flood season in the main raw water pipeline 8 is transported to the mixing and equalizing water tank 6 through the second water delivery pipeline 10; the water treated by the mixing and equalizing water tank 6 is transported back to the main raw water pipeline 8 through the third water delivery pipeline 11 and finally transported to the water plant 9. The high turbidity raw water in the flood season from the water source 1 and the low turbidity water from the infiltration water collection gallery 3 are mixed and equalized by the mixing and equalizing water tank 6. The turbidity range of the high turbidity raw water in the flood season is controlled at 600NTU or less by the stratified water intake device 7; the turbidity of the low turbidity water is controlled at 100NTU or less.

[0034] Reference Figure 2 The stratified water intake device 7 includes a vertical shaft 17, which is dug on a protruding ridge 34 extending to the water source 1. The vertical shaft 17 is dug with a surface water intake tunnel 18, a middle water intake tunnel 19 and a deep water intake tunnel 20 at different depths; the surface water intake tunnel 18, the middle water intake tunnel 19 and the deep water intake tunnel 20 are all provided with a vertical shaft water inlet 21, and each of the vertical shaft water inlet 21 is provided with a control gate 22; the surface water intake tunnel 18, the middle water intake tunnel 19 and the deep water intake tunnel 20 extend radially toward the vertical shaft 17 to the water source 1, connecting the water source 1 with the vertical shaft water inlet 21; a water outlet tunnel 23 is also opened at the bottom of the vertical shaft 17, and the water outlet tunnel 23 is connected to the main raw water pipeline 8.

[0035] Reference Figure 2The construction process of the stratified water intake device 7 includes: digging a shaft excavation platform 35 on a protruding ridge 34 extending to the water source 1, digging a shaft 17 at the shaft excavation platform 35, and digging surface water intake tunnels 18, middle water intake tunnels 19 and deep water intake tunnels 20 arranged radially facing the shaft 17 at different depths of the shaft 17. The ends of the surface water intake tunnels 18, middle water intake tunnels 19 and deep water intake tunnels 20 connected to the water source 1 are respectively provided with rock plugs 33 to block water. After the construction of the surface water intake tunnels 18, middle water intake tunnels 19, deep water intake tunnels 20 and the shaft 17 is completed, the rock plugs 33 are excavated by water operations.

[0036] Reference Figure 1 , Figure 3 and Figure 4 The infiltration water collection gallery 3 includes one or more thick-walled, densely perforated reinforced concrete box culverts 15 buried side by side inside the riverbed 2 and a sand and gravel filtration system 16 arranged around the thick-walled, densely perforated reinforced concrete box culverts 15 . The sand and gravel filtration system 16 adopts a coarse-fine-coarse filtration structure. The sand and gravel filtration system 16 is sequentially provided with a 8-32 mm particle size gravel layer 24, a 4-8 mm particle size gravel layer 25 and a riverbed gravel layer 26 mixed with clay particles from the bottom surface of the thick-walled densely perforated reinforced concrete box culvert 15 downward; the sand and gravel filtration system 16 is sequentially provided with a 8-32 mm particle size gravel layer 24, a 4-8 mm particle size gravel layer 25, a 2-4 mm particle size gravel layer 27, a 0.5-2 mm medium-coarse sand layer 28, a 40-60 mm crushed stone cushion layer 29 and a 100-150 mm large particle size pebble layer 30 from the top surface of the thick-walled densely perforated reinforced concrete box culvert 15 upward.

[0037] Reference Figure 5 The large-size pebble layer 30 includes a plurality of riverbed concrete grids 31 , each of which is embedded with a plurality of gabion cages 32 , and each of which is filled with large-size pebbles of 100 to 150 mm.

[0038] The working method of treating high-turbidity raw water during flood season by using the emergency treatment system for high-turbidity raw water during flood season comprises: closing the first valve 12, opening the second valve 13, opening the control gate 22 of the water intake tunnel with a turbidity range of 600NTU and below, and the high-turbidity raw water during flood season flows through the vertical shaft 17, the outlet tunnel 23, the main raw water pipeline 8 and the second water supply pipeline 10 in sequence and merges into the mixed equalization water tank 6; the low-turbidity water collected by the infiltration water collection gallery 3 is pressurized by the pressure pump station 4, flows through the first water supply pipeline 5 and merges into the mixed equalization water tank 6; after the high-turbidity raw water during flood season and the low-turbidity water are mixed and equalized in the mixed equalization water tank 6, the third valve 14 is opened, and the treated water flows back into the main raw water pipeline 8 via the third water supply pipeline 11 and is finally transported to the water plant 9 for subsequent treatment.

[0039] During the non-flood period, the working method of the emergency treatment system includes: opening the first valve 12, closing the second valve 13 and the third valve 14 at the same time, and opening the control gate 22 of the surface water intake tunnel 18, the middle water intake tunnel 19 or the deep water intake tunnel 20 according to the water quality conditions. The water from the water source 1 flows through the vertical shaft 17, the outlet tunnel 23 and the main raw water pipeline 8 in sequence and directly enters the water plant 9 for subsequent treatment; for example, in autumn, the heavy metal content in the outlet water of the deep water intake tunnel 20 exceeds the standard, so the control gate 22 of the surface water intake tunnel 18 needs to be opened; in summer, if algae pollution breaks out in the water source, the control gate 22 of the deep water intake tunnel 20 needs to be opened.

[0040] From the above technical solutions, it can be seen that the emergency treatment system for high-turbidity raw water during flood season of this application provides a new system for dealing with high-turbidity raw water during rainstorms and floods, and provides a new idea for the construction of urban emergency water sources. Through the construction idea of ​​combining stratified water extraction from the water source and mixing low-turbidity water along the way, the pre-sedimentation tank scheme with large land area, high investment and operation costs is avoided. It can be combined with the actual situation of the existing water source, and the existing commonly used water source can be transformed for stratified water extraction, and by newly building or using low-turbidity water sources along the way, the combination of the two can achieve the water volume and water quality standards for emergency water extraction. Compared with the traditional pre-sedimentation tank scheme, it can save land and reduce construction, operation and maintenance costs.

[0041] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An emergency treatment system for high turbidity raw water during flood season, characterized in that: The invention comprises a water source (1), wherein the water source (1) is connected to a riverbed (2), an infiltration water collection gallery (3) is buried inside the riverbed (2), the end of the infiltration water collection gallery (3) is connected to a pressure pump station (4), the pressure pump station (4) is connected to a mixing pressure equalization pool (6) through a first water delivery pipeline (5), the water source (1) is provided with a stratified water intake device (7), the stratified water intake device (7) is connected to a main raw water pipeline (8), the main raw water pipeline (8) is connected to a water plant (9), and the main raw water pipeline (8) is respectively provided with A second water pipeline (10) and a third water pipeline (11), wherein the second water pipeline (10) and the third water pipeline (11) connect the main raw water pipeline (8) and the mixing and pressure-equalizing water tank (6), the main raw water pipeline (8) is provided with a first valve (12), the first valve (12) is located between the second water pipeline (10) and the third water pipeline (11), the second water pipeline (10) is provided with a second valve (13), and the third water pipeline (11) is provided with a third valve (14).

2. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 1, characterized in that: The stratified water intake device (7) comprises a vertical shaft (17), the vertical shaft (17) is dug on a protruding ridge (34) extending to a water source (1), and the vertical shaft (17) is respectively dug with a surface water intake tunnel (18), a middle water intake tunnel (19) and a deep water intake tunnel (20) at different depths; the surface water intake tunnel (18), the middle water intake tunnel (19) and the deep water intake tunnel (20) are respectively provided with rock plugs (33) at one end connected to the water source (1) and are respectively provided with rock plugs (33) at the other end. A vertical shaft water inlet (21) is provided, and each of the vertical shaft water inlets (21) is provided with a control gate (22); the surface water intake tunnel (18), the middle water intake tunnel (19) and the deep water intake tunnel (20) extend radially toward the vertical shaft (17) to the water source (1), connecting the water source (1) with the vertical shaft water inlet (21); a water outlet tunnel (23) is also provided at the bottom of the vertical shaft (17), and the water outlet tunnel (23) is connected to the main raw water pipeline (8).

3. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 2, characterized in that: After the construction of the surface water intake tunnel (18), the middle water intake tunnel (19), the deep water intake tunnel (20) and the vertical shaft (17) is completed, the rock plug (33) is removed by water operations.

4. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 1, characterized in that: The infiltration water collection gallery (3) comprises one or more thick-walled, densely perforated reinforced concrete box culverts (15) buried side by side inside the riverbed (2) and a sand and gravel filtration system (16) arranged around the thick-walled, densely perforated reinforced concrete box culvert (15), and low turbidity water is collected through the infiltration water collection gallery (3).

5. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 4, characterized in that: The sand and gravel filter system (16) adopts a coarse-fine-coarse filter structure. The sand and gravel filter system (16) is provided with a gravel layer (24) with a particle size of 8 to 32 mm, a gravel layer (25) with a particle size of 4 to 8 mm, and a riverbed gravel layer (26) mixed with clay particles in sequence from the bottom surface of the thick-walled, densely perforated reinforced concrete box culvert (15); and the sand and gravel filter system (16) is provided with a gravel layer (24) with a particle size of 8 to 32 mm, a gravel layer (25) with a particle size of 4 to 8 mm, a gravel layer (27) with a particle size of 2 to 4 mm, a medium-coarse sand layer (28) with a particle size of 0.5 to 2 mm, a crushed stone cushion layer (29) with a particle size of 40 to 60 mm, and a large-grained pebble layer (30) with a particle size of 100 to 150 mm in sequence from the top surface of the thick-walled, densely perforated reinforced concrete box culvert (15).

6. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 5, characterized in that: The large-diameter pebble layer (30) comprises a plurality of riverbed concrete grids (31), each of which is embedded with a plurality of gabion stone cages (32), and each of the gabion stone cages (32) is filled with large-diameter pebbles of 100 to 150 mm.

7. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 1, characterized in that: The pressure pump station (4) is arranged at the end of the infiltration water collection gallery (3), and the low turbidity water collected by the infiltration water collection gallery (3) is pressurized by the pressure pump station (4) and the low turbidity water is injected into the first water delivery pipeline (5).

8. The emergency treatment system for high-turbidity raw water during flood season according to claim 1, characterized in that: The low-turbidity water collected from the infiltration water collection gallery (3) is transported to the mixing and equalizing water tank (6) via the first water delivery pipeline (5); the high-turbidity raw water in the flood season in the main raw water pipeline (8) is transported to the mixing and equalizing water tank (6) via the second water delivery pipeline (10); and the water treated in the mixing and equalizing water tank (6) is transported back to the main raw water pipeline (8) via the third water delivery pipeline (11) and finally transported to the water plant (9).

9. The emergency treatment system for high turbidity raw water during flood season as claimed in claim 1, characterized in that: The high-turbidity raw water from the water source (1) during the flood season and the low-turbidity water from the infiltration water collection gallery (3) are mixed and pressure-controlled by the mixing and pressure-controlled water tank (6).

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