CN107938807B - Seepage, storage and drainage rainwater pipe gallery and construction method - Google Patents
Seepage, storage and drainage rainwater pipe gallery and construction method Download PDFInfo
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- CN107938807B CN107938807B CN201810009273.0A CN201810009273A CN107938807B CN 107938807 B CN107938807 B CN 107938807B CN 201810009273 A CN201810009273 A CN 201810009273A CN 107938807 B CN107938807 B CN 107938807B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
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Abstract
The application discloses a seepage-storage drainage rainwater pipe gallery and a construction method, belongs to the field of drainage engineering, and particularly relates to a structure and a construction method for regulating and storing rainwater in a staggered mode and supplementing underground water by utilizing rainwater seepage. The rainwater drainage pipe gallery mainly comprises a drain pipe, a rainwater drainage gallery and an inspection well. The drain pipe is located the upper portion that oozes the water storage corridor, oozes the rectangular corridor form water storage space that water storage corridor was laid along the drain pipe trend, and drain pipe and the upper and lower overlapping setting of oozing the water storage corridor form oozes and hold the drainage rainwater pipe corridor, fuses drain pipe, rainwater regulation pond as an organic whole, does not additionally occupy underground space. The drain pipe is connected in series to the inspection shaft, and the bottom and the infiltration retaining corridor of inspection shaft communicate, and the regulation volume is big. The water seepage points are distributed along the drain pipe, and the water seepage recharging effect is good. The seepage water storage corridor is constructed by adopting a plastic water storage module, so that the construction cost is low and the construction is convenient.
Description
Technical Field
The application relates to a seepage-storage drainage rainwater pipe gallery and a construction method, belongs to the field of drainage engineering, and particularly relates to a structure and a construction method for regulating and storing rainwater in a staggered mode and supplementing underground water by utilizing rainwater seepage.
Background
Urban drainage is mostly discharged by adopting concealed pipes, and rainwater is collected by branch pipes and collected to main pipes, and finally collected to main pipes to be discharged into water. In recent years, along with the aggravation of extreme weather phenomena, waterlogging phenomena occur to different degrees, serious losses are caused, urban drainage systems are related to urban safety, and urban waterlogging disaster problems are increasingly valued by related departments. The traditional urban construction mode is that the road surface is hardened everywhere, and every heavy rain mainly depends on 'gray' facilities such as a pipe canal, a pump station and the like to drain water, and the 'quick drainage' and the 'tail end centralized' control are taken as main planning and design concepts, so that the water logging is needed when the road surface is rainy, and the drought and the waterlogging are suddenly turned. According to the technical guidelines for sponge urban construction, urban construction will emphasize that grass planting ditches, rainwater gardens, sinking greenbelts, reservoirs and other 'green' measures are utilized to organize drainage in the future, and slow release and 'source dispersion' control are used as main planning design concepts. The sponge city is like a sponge, and can absorb, store, permeate and purify rainwater on site or nearby when raining is encountered, supplement groundwater and regulate water circulation; the stored water is released and utilized under the condition of drought and water shortage, so that the migration activity of the water in the city is more natural.
An important index in the design of the drainage pipeline is the heavy rain reproduction period, the reproduction period is selected to be large, the occurrence probability of waterlogging is reduced, but the construction cost is increased, and the reproduction period is selected reasonably according to the construction cost and the section of the drainage pipeline. The design reproduction period of the drainage pipeline under the general urban road is selected to be 2-3 years, and the low-lying area can be selected to be 5 years. When heavy rain exceeding the design reproduction period occurs, the drainage pipeline discharges urgently, so that rainwater overflows to the ground to form waterlogging. The rainwater pipeline is reasonably provided with the regulating and accumulating tank, the peak period of the storm can be staggered by utilizing rainwater regulation and accumulation, the outflow time is delayed, the burden of a downstream pipeline section is lightened, and therefore, the occurrence of waterlogging is reduced. In the prior art, the rainwater regulation and storage tank is generally constructed by adopting reinforced concrete, is built outside a road, or is arranged on a rainwater pipeline at a certain distance along a line, so that the volume of the arranged regulation and storage tank is small, and the capacity of regulating and storing peak staggering is low. The reinforced concrete regulation pool has high manufacturing cost and high construction difficulty.
Water is a source of life and water conservation has become a focus of human beings. Because of the large amount of underground water produced, the water storage capacity of some cities is drastically reduced, the underground water level is reduced year by year, in addition, the ground of the cities is hard to destroy the natural water circulation channel, and the rainwater falls on the building area or the hardened ground and cannot circulate in a natural way, so that the water content of the soil is changed, and the underground water quantity formed by the natural circulation is greatly reduced. For general cities, most rainfall is medium rain and small rain except in rainy seasons, and in seasons with low positive groundwater level, rainwater is discharged through pipelines and cannot effectively infiltrate into underground to supplement groundwater, so that the method is a waste of water resources. At present, groundwater recharging is increasingly receiving attention from people. The rainwater infiltration not only can play an important role in relieving drainage pressure and solving urban waterlogging, but also can play a role in supplementing groundwater and conserving a life-saving machine.
Disclosure of Invention
The purpose of the application is that: the utility model provides a ooze and hold drainage rainwater pipe gallery and construction method, ooze and hold drainage rainwater pipe gallery and melt drain pipe, rainwater regulation pond as an organic whole, the regulation pond has infiltration and retaining dual function, and the drain pipe is located the upper portion that oozes the water storage gallery, oozes the long strip corridor form water storage space that the water storage gallery was laid along the drain pipe trend. The beneficial effects are that: the drain pipe and the infiltration water storage corridor are overlapped up and down to form the infiltration water storage drainage rainwater pipe corridor, the underground space is not additionally occupied, the regulation and storage volume is large, the water seepage points are distributed along the drain pipe, and the water seepage recharging effect is good. The seepage water storage corridor is constructed by adopting a plastic water storage module, so that the construction cost is low and the construction is convenient.
The application is realized by the following technology: the rainwater drainage pipe gallery mainly comprises a drain pipe 1, a rainwater drainage gallery 2 and an inspection well 3. The drain pipe 1 is located the upper portion that oozes water storage corridor 2, oozes water storage corridor 2 and is the rectangular corridor form water storage space of laying along drain pipe 1 trend, and drain pipe 1 and oozes water storage corridor 2 overlap from top to bottom and set up and form oozes water storage drainage rainwater pipe corridor. The inspection shaft 3 is with drain pipe 1 series connection, and the bottom and the infiltration of inspection shaft 3 hold water corridor 2 intercommunication, and the rainwater that gets into drain pipe 1 through inlet for stom water and user branch pipe flows into infiltration through inspection shaft 3 earlier and holds water corridor 2, and the rainwater is through infiltration water corridor 2 infiltration soil, and the rainwater holds in infiltration water corridor 2 memory after the soil saturation, and infiltration water corridor 2 is held back rethread drain pipe 1 and is discharged the low reaches. The infiltration water storage corridor 2 is the underground water storage space that is assembled by the water storage module 20, and the geotechnique cloth 4 permeates water is wrapped up in the water storage module 20 outside, fills grit permeable layer 5 with the gap of both sides slot, and the effect of geotechnique cloth 4 permeates water is to avoid permeable layer 5 to scatter to infiltration water storage corridor 2 in, and the water in the infiltration water storage corridor 2 can permeate the underground through geotechnique cloth 4 permeates water, grit permeable layer 5.
The upper portion of the infiltration water storage corridor 2 is provided with a mattress layer 6, the mattress layer 6 is wrapped by a geogrid 7, the geogrid 7 is a plastic two-way geogrid, and a pipeline foundation 8 of the drain pipe 1 is arranged on the mattress layer 6.
Drain pipes 1 are connected at two ends of an inspection well 3, an inspection well foundation 9 is arranged at the lower part of the inspection well 3, a workbench 10 is arranged at two sides of the inspection well 3 corresponding to the pipe orifice, a launder 11 is arranged in the middle of the workbench 10, the inspection well foundation 9 is in a hollow shape at the position of the launder 11, rainwater enters a channel of the water seepage and storage gallery 2 from the inspection well 3, a filter 12 is placed in the channel, a nylon net is arranged in a plastic basket for the filter 12, and the cleaning can be taken out from the channel.
The water storage module 20 is a grid frame-shaped hollow cuboid and consists of cubes of m rows, n columns and k rows of units, a frame 21 is arranged between adjacent corner points A of each cube, an inclined frame 22 is arranged between opposite corner points A of one face of each cube, the inclined frame 22 is intersected at a face midpoint B of the cube, inclined struts 23 are arranged between corner points A of two opposite angles in the cube, the inclined struts 23 are intersected at a cube central point O, a cross strut 24 is arranged between two opposite face midpoints B of the cube, and the inclined struts are also intersected at the cube central point O; the frame 21, the inclined frame 22, the inclined support 23 and the cross support 24 are rod-shaped members which are injection molded by plastics, the side length a of cubes is 20-40 cm, the number m of cube units forming the water storage module 20 in the height direction is 1-4 rows, the number n of cube units in the width direction is 1-4 columns, the number k of cube units in the length direction is 2-8 rows, and k is 1.5-2 times of m and n, and all cube units forming one water storage module 20 are connected into a whole. The water storage modules 20 are assembled by mortise and tenon connection, the front face, the left side face and the bottom face of the water storage modules 20 are mortise holes, the back face, the right side face and the top face are tenons, and the tenons are inserted into the mortise holes during assembly.
The application provides a construction method of a seepage, storage and drainage rainwater pipe gallery, which comprises the following construction steps.
a. Digging a groove to the bottom of the water seepage and accumulation gallery 2, wherein the bottom width of the groove is an integral multiple of the width of the water accumulation module 20;
b. paving a permeable geotextile 4, paving the width of the permeable geotextile 4 along the length direction of the permeable water storage corridor 2, overlapping the overlapping part by not less than 10 cm, surrounding the cross section of the permeable water storage corridor 2 by one circle, and overlapping the top by not less than 10 cm;
c. assembling the water storage modules 20 from the bottom layer by layer according to the width of the water seepage and storage corridor 2, assembling by staggered joint in a T-shaped crossing mode, wherein the minimum staggered joint width is a, and inserting tenons of the water storage modules 20 into mortise holes for locking;
d. turning over the permeable geotextile 4 from two sides of the assembled permeable water storage gallery 2 to the top, and binding the lap joint by adopting plastic binding wires;
e. paving an earthwork grille 7 on the upper part of the seepage and water storage corridor 2, paving the width of the earthwork grille 7 along the length direction of the seepage and water storage corridor 2, overlapping the overlapping part by not less than 10 cm, surrounding the cross section of the mattress pad layer 6 by one circle by the length of the earthwork grille 7, and overlapping the top by not less than 10 cm;
f. the method comprises the steps of (1) paving a mattress layer 6 by using broken stones on a geogrid 7, tamping the mattress layer 6, turning the geogrid 7 to the top, and binding the lap joint by using plastic binding wires;
g. constructing a pipeline foundation 8 on the mattress layer 6, and paving a drain pipe 1;
h. pouring an inspection well foundation 9 on the water seepage and storage corridor 2 at the position of the inspection well 3, and reserving a filter 12 placing position in the middle;
i. masonry of a well body is carried out on the inspection well foundation 9, two sides of the corresponding pipe orifice are masonry of a workbench 10, a launder 11 is formed in the middle of the workbench 10, a ladder stand 13 is arranged on the upper well body, a well bore is closed or a cover plate is arranged, and a well cover is installed;
j. the layers of backfill 14 are laminated to the ground in the trench.
The peak-shifting regulation working conditions of the seepage-storage drainage rainwater pipe gallery are as follows: at the early stage of rainfall, ground rainwater is collected by the inlet for stom water, flows into drain pipe 1 through the branch pipe, and the rainwater that gets into drain pipe 1 flows into infiltration water storage corridor 2 through inspection shaft 3 earlier, and the rainwater infiltrates soil through infiltration water storage corridor 2. After the soil is saturated, rainwater is stored in the seepage and water storage corridor 2, and after the seepage and water storage corridor 2 is fully stored, the rainwater is discharged into the downstream through the drain pipe 1, so that the peak shifting and regulation effects are achieved. After rainfall is reduced, the water stored in the water seepage and storage corridor 2 can be pumped out by a water pump and discharged into a downstream pipeline, and the water stored in the water seepage and storage corridor 2 is emptied, so that the water can be regulated and stored again. After the rainfall is finished, the water stored in the water storage corridor 2 can slowly permeate back to the ground water, and a rainwater benefit system can be arranged to water the watering vehicle to water the watering road or to pump the water storage irrigation road green belt through the pipeline irrigation system.
Drawings
FIG. 1 is a longitudinal cross-sectional view of a rainwater drainage pipe gallery;
FIG. 2 is a cross-sectional view of the position of a section of a rainwater drainage pipe gallery;
FIG. 3 is a cross-sectional view of the position of the drainage and seepage pipe gallery;
FIG. 4 is a perspective view of a water storage module;
FIG. 5 is a perspective view of a cube unit comprising the water storage module;
fig. 6 is a perspective view of the internal rod of a cube unit comprising the water storage module.
In the figure: 1-drain pipe, 2-infiltration water storage corridor, 3-inspection well, 4-permeable geotechnical cloth, 5-grit permeable layer, 6-mattress pad layer, 7-geogrid, 8-pipeline foundation, 9-inspection well foundation, 10-workbench, 11-launder, 12-filter, 13-cat ladder, 14-backfill, 20-water storage module, 21 frame, 22-inclined frame, 23-inclined strut and 24-transverse strut.
Detailed Description
The application relates to a structure for regulating and accumulating rainwater in a staggered mode and supplementing groundwater by utilizing rainwater infiltration, and the structure is shown in figures 1, 2 and 3. The rainwater drainage pipe gallery mainly comprises a drain pipe 1, a rainwater drainage gallery 2 and an inspection well 3. The drain pipe 1 is located the upper portion that oozes water storage corridor 2, oozes water storage corridor 2 and is the rectangular corridor form water storage space of laying along drain pipe 1 trend, and drain pipe 1 and oozes water storage corridor 2 overlap from top to bottom and set up and form oozes water storage drainage rainwater pipe corridor. The drain pipe 1 is connected in series by the inspection well 3, the bottom of the inspection well 3 is communicated with the seepage and accumulation rain pipe gallery 2, and the longitudinal section of the seepage and accumulation rain pipe gallery is shown in fig. 1. Rainwater entering the drain pipe 1 through the rainwater inlet and the user branch pipe flows into the water seepage and storage corridor 2 through the inspection well 3, the rainwater permeates into soil through the water seepage and storage corridor 2, the rainwater is stored in the water seepage and storage corridor 2 after the soil is saturated, and the rainwater is drained into the downstream through the drain pipe 1 after the water seepage and storage corridor 2 is fully stored. The infiltration water storage corridor 2 is an underground water storage space formed by assembling water storage modules 20, the outside of the water storage modules 20 is wrapped with water permeable geotechnical cloth 4, gaps between the water storage modules and grooves on two sides are filled with sand and stone permeable layers 5, and a cross section view of the pipe section position of the infiltration water storage drainage rainwater pipe corridor is shown in fig. 2. The effect of geotechnical cloth 4 permeates water is to avoid scattering to ooze in the retaining corridor 2 when filling permeable layer 5, and the water in the retaining corridor 2 permeates water geotechnical cloth 4, grit permeable layer 5 infiltration underground through permeating water.
The upper portion of the infiltration water storage corridor 2 is provided with a mattress layer 6, the mattress layer 6 is a rubble layer, the thickness is 20-40 cm, the mattress layer 6 is wrapped by a geogrid 7, the geogrid 7 is a plastic two-way geogrid, the geogrid 7 surrounds the cross section of the mattress layer 6 for a circle, and the middle of the top of the mattress layer 6 is lapped, and the lap joint overlap is not less than 10 cm. After the geogrid 7 is wrapped by the mattress layer 6, the mattress layer 6 is bound by plastic binding wires to form a constrained whole, the pipeline foundation 8 of the drain pipe 1 is arranged on the mattress layer 6, so that the force transmitted to the drain pipe 1 by the ground can be uniformly transmitted to the top of the water seepage and storage corridor 2 through the force diffusion of the pipeline foundation 8, and the acting force of the received unit area at the top of the water seepage and storage corridor 2 is reduced.
Drain pipes 1 are connected at two ends of an inspection well 3, an inspection well foundation 9 is arranged at the lower part of the inspection well 3, a workbench 10 is arranged at two sides of the inspection well 3 corresponding to the pipe orifice, a launder 11 is arranged in the middle of the workbench 10, the inspection well foundation 9 is in a hollow shape at the position of the launder 11, rainwater enters a channel of the water seepage and storage gallery 2 from the inspection well 3, a filter 12 is placed in the channel, a nylon net is arranged in a plastic basket for the filter 12, and the cleaning can be taken out from the channel. The transverse plane of the position of the inspection well of the seepage, storage and drainage rainwater pipe gallery is shown in fig. 3.
The water storage module 20 is formed by plastic injection molding and is a grid frame-shaped hollow cuboid, and a perspective view is shown in fig. 4. The water storage module 20 is composed of cubes of m rows and n columns and k rows of units, wherein a cube unit is shown in a perspective view in fig. 5, and the side length of the cube is a. Between adjacent corner points a of each cube is a frame 21 (thick solid line in fig. 5), between opposite corner points a of one face of the cube is a diagonal frame 22 (thin solid line in fig. 5), and the diagonal frame 22 intersects at a face midpoint B of the cube. A perspective view of a rod inside a cube unit is shown in fig. 6, diagonal braces 23 are arranged between corner points A of two opposite corners inside the cube (thick solid lines in fig. 6), the diagonal braces 23 intersect with a center point O of the cube, cross braces 24 are arranged between middle points B of two opposite faces of the cube (thick broken lines in fig. 6), and the cross braces 24 also intersect with the center point O of the cube. The frame 21, the inclined frame 22, the inclined strut 23 and the transverse strut 24 are rod-shaped members which are injection molded by plastics and form a statically indeterminate structure. The side length a of the cube units forming the water storage module 20 is 20-40 cm, the number m of cube units forming the water storage module 20 in the height direction is 1-4 rows, the number n of cube units in the width direction is 1-4 columns, the number k of cube units in the length direction is 2-8 rows, and k is 1.5-2 times of m and n, and all cube units forming one water storage module 20 are connected into a whole. The water storage modules 20 are assembled by mortise and tenon connection, the front face, the left side face and the bottom face of the water storage modules 20 are mortise holes, the back face, the right side face and the top face are tenons, and the tenons are inserted into the mortise holes during assembly.
The water storage module of cuboid is formed by the cube combination of hyperstatic structure, when receiving ground load effect, through perpendicular and downward certain spread angle transmission, node A and node B between the cube unit of water storage module 20 are the coincidence, when water storage module 20 assembles, by mortise and tenon accurate positioning, node A and node B are corresponding between the module that meets, the load passes through these nodes, the member diffusion is the transmission downwards, the atress of strength decomposition messenger member reduces, thereby can reduce the section size of member effectively, practice thrift plastic materials's quantity, the inside space increase of water storage module is favorable to more retaining simultaneously.
The peak-shifting regulation working conditions of the seepage-storage drainage rainwater pipe gallery are as follows: at the early stage of rainfall, ground rainwater is collected by the inlet for stom water, flows into drain pipe 1 through the branch pipe, and the rainwater that gets into drain pipe 1 flows into infiltration water storage corridor 2 through inspection shaft 3 earlier, and the rainwater is through infiltration water storage corridor 2 infiltration soil, and the rainwater is in infiltration water storage corridor 2 memory storage after the soil saturation, and infiltration water storage corridor 2 is full after the accumulation and is discharged the low reaches through drain pipe 1 again, has played the effect of peak-shifting regulation. After rainfall is reduced, the water stored in the water seepage and storage corridor 2 can be pumped out by a water pump and discharged into a downstream pipeline, and the water stored in the water seepage and storage corridor 2 is emptied, so that the water can be regulated and stored again. After the rainfall is finished, the water stored in the water storage corridor 2 can slowly permeate back to the ground water, and a rainwater benefit system can be arranged to water the watering vehicle to water the watering road or to pump the water storage irrigation road green belt through the pipeline irrigation system. The water pump can be arranged in the inspection well 3, the position for installing the water pump is reserved when the water storage module 20 at the lower part of the inspection well 3 is assembled, and the water outlet pipe of the water pump is arranged according to the actual conditions of pumping, water adding and irrigation.
In the region with rich underground water, if the requirement of infiltration recharging is not met, the permeable geotechnical cloth 4 can be changed into a waterproof geotechnical film, the waterproof geotechnical film adopts an HDPE plastic geofilm with the thickness of 1-2 mm, the lap joint part adopts hot-melt welding, and the infiltration water storage corridor 2 becomes a water storage corridor which only stores water and is not infiltrated.
The construction method of the seepage, storage and drainage rainwater pipe gallery comprises the following steps:
a. digging a groove to the bottom of the water seepage and accumulation gallery 2, wherein the bottom width of the groove is an integer multiple of the width n of the water accumulation module 20;
b. paving a permeable geotextile 4, paving the width of the permeable geotextile 4 along the length direction of the permeable water storage corridor 2, overlapping the overlapping part by not less than 10 cm, surrounding the cross section of the permeable water storage corridor 2 by one circle, and overlapping the top by not less than 10 cm;
c. assembling the water storage modules 20 from the bottom layer by layer according to the width of the water seepage and storage corridor 2, assembling by staggered joint in a T-shaped crossing mode, wherein the minimum staggered joint width is a, and inserting tenons of the water storage modules 20 into mortise holes for locking;
d. turning over the permeable geotextile 4 from two sides of the assembled permeable water storage gallery 2 to the top, and binding the lap joint by adopting plastic binding wires;
e. paving an earthwork grille 7 on the upper part of the seepage and water storage corridor 2, paving the width of the earthwork grille 7 along the length direction of the seepage and water storage corridor 2, overlapping the overlapping part by not less than 10 cm, surrounding the cross section of the mattress pad layer 6 by one circle by the length of the earthwork grille 7, and overlapping the top by not less than 10 cm;
f. the method comprises the steps of (1) paving a mattress layer 6 by using broken stones on a geogrid 7, tamping the mattress layer 6, turning the geogrid 7 to the top, and binding the lap joint by using plastic binding wires;
g. constructing a pipeline foundation 8 on the mattress layer 6, and paving a drain pipe 1;
h. pouring an inspection well foundation 9 on the water seepage and storage corridor 2 at the position of the inspection well 3, and reserving a filter 12 placing position in the middle;
i. masonry of a well body is carried out on the inspection well foundation 9, two sides of the corresponding pipe orifice are masonry of a workbench 10, a launder 11 is formed in the middle of the workbench 10, a ladder stand 13 is arranged on the upper well body, a well bore is closed or a cover plate is arranged, and a well cover is installed;
j. the layers of backfill 14 are laminated to the ground in the trench.
The structures described in the present application and the drawings are only one embodiment of a storage structure, and the storage structure formed by combining the long strip-shaped water storage space and the drain pipe is within the protection scope of the present application.
Claims (3)
1. The utility model provides a ooze and hold drainage rainwater pipe corridor, mainly includes drain pipe (1), ooze retaining corridor (2), inspection shaft (3), characterized by: the drainage pipe (1) is positioned at the upper part of the water seepage and storage corridor (2), the water seepage and storage corridor (2) is a strip corridor-shaped water storage space paved along the trend of the drainage pipe (1), the drainage pipe (1) and the water seepage and storage corridor (2) are overlapped up and down to form a water seepage and storage rainwater drainage pipe corridor, the drainage pipe (1) is connected in series by the inspection well (3), the bottom of the inspection well (3) is communicated with the water seepage and storage corridor (2), the water seepage and storage corridor (2) is an underground water storage space formed by assembling water storage modules (20), the water storage modules (20) are wrapped with water permeable geotechnical cloth (4), and sand and water permeable layers (5) are filled in gaps between the water drainage pipe and the water seepage and storage corridor (2);
the upper part of the water seepage and storage corridor (2) is provided with a mattress layer (6), the mattress layer (6) is wrapped by a geogrid (7), the geogrid (7) is a plastic two-way geogrid, and a pipeline foundation (8) of the drain pipe (1) is arranged on the mattress layer (6);
the water storage module (20) is a grid frame-shaped hollow cuboid and consists of cubes of m rows, n columns and k rows of units, a frame (21) is arranged between adjacent corner points A of each cube, a diagonal frame (22) is arranged between opposite corner points A of one face of each cube, the diagonal frame (22) is intersected at a face midpoint B of the cube, diagonal braces (23) are arranged between two diagonal corner points A in the cube, the diagonal braces (23) are intersected with a cube center point O, a cross brace (24) is arranged between two opposite face midpoints B of the cube, and the diagonal braces are also intersected with the cube center point O; the frame (21), the inclined frame (22), the inclined support (23) and the cross support (24) are rod-shaped members which are molded by plastics, the side length a of cubes is 20-40 cm, the number m of cube units forming the water storage module (20) in the height direction is 1-4 rows, the number n of cube units in the width direction is 1-4 columns, the number k of cube units in the length direction is 2-8 rows, and k is 1.5-2 times of m and n, and all cube units forming the water storage module (20) are connected into a whole; the water storage modules (20) are assembled by mortise and tenon connection, the front surface, the left side surface and the bottom surface of the water storage modules (20) are mortise holes, the back surface, the right side surface and the top surface are tenons, and the tenons are inserted into the mortise holes during assembly;
the peak-shifting regulation working conditions of the seepage-storage drainage rainwater pipe gallery are as follows: in the early stage of rainfall, ground rainwater is collected by a rain inlet, flows into a drainage pipe (1) through a branch pipe, flows into a seepage and accumulation corridor (2) through an inspection well (3), permeates into soil through the seepage and accumulation corridor (2), stores the saturated soil in the seepage and accumulation corridor (2), and is discharged into the downstream through the drainage pipe (1) after the seepage and accumulation corridor (2) is fully accumulated, so that the peak-shifting and accumulation regulating effects are achieved; after rainfall is reduced, the water stored in the water seepage and storage corridor (2) is pumped out by a water pump and discharged into a downstream pipeline, and the water stored in the water seepage and storage corridor (2) is emptied, so that secondary regulation and storage are facilitated; after the rainfall is over, the water stored in the water seepage and storage corridor (2) slowly infiltrates back to the underground water.
2. The osmotic storage and drainage rainwater pipe gallery of claim 1, wherein: drain pipe (1) are connected at inspection shaft (3) both ends, inspection shaft (3) lower part sets up inspection shaft basis (9), the both sides that correspond the mouth of pipe position in inspection shaft (3) are workstation (10), be chute (11) in the middle of workstation (10), inspection shaft basis (9) are the hourglass form in the position of chute (11), are the passageway that rainwater got into infiltration water storage corridor (2) from inspection shaft (3), place filter (12) in the passageway, filter (12) are set up the nylon wire in the plastic basket, can take out the clearance in the passageway.
3. A method for constructing a drainage rain pipe gallery according to claim 1, which is characterized by comprising the following steps: the construction steps are as follows:
a. digging a groove to the bottom of the water seepage and storage gallery (2), wherein the bottom width of the groove is an integral multiple of the width of the water storage module (20);
b. paving a permeable geotextile (4), paving the width of the permeable geotextile (4) along the length direction of the water seepage and storage corridor (2), overlapping the overlapping part by not less than 10 cm, surrounding the cross section of the water seepage and storage corridor (2) by one circle by the length of the permeable geotextile (4), and overlapping the top by not less than 10 cm;
c. assembling the water storage modules (20) from the bottom layer by layer according to the width of the water seepage and storage corridor (2), assembling by staggered joint in a T-shaped crossing mode, wherein the minimum staggered joint width is a, and inserting tenons of the water storage modules (20) into mortise holes for locking;
d. turning over the permeable geotextile (4) from two sides of the assembled water seepage and storage corridor (2) to the top, and binding the lap joint by adopting plastic binding wires;
e. paving an earthwork grille (7) on the upper part of the water seepage and storage corridor (2), paving the width of the earthwork grille (7) along the length direction of the water seepage and storage corridor (2), overlapping the overlapping part by not less than 10 cm, and overlapping the top by not less than 10 cm when the length of the earthwork grille (7) surrounds one circle of the cross section of the mattress pad layer (6);
f. a broken stone mattress layer (6) is adopted on the geogrid (7), the mattress layer (6) is tamped, the geogrid (7) is turned to the top, and the lap joint is bound by plastic binding wires;
g. constructing a pipeline foundation (8) on the mattress layer (6), and paving a drain pipe (1);
h. pouring an inspection well foundation (9) on the water seepage and storage corridor (2) at the position of the inspection well (3), and reserving a filter (12) placing position in the middle;
i. masonry well bodies are arranged on the inspection well foundation (9), two sides of the inspection well foundation, corresponding to the pipe orifice, are masonry work tables (10), a launder (11) is formed in the middle of each work table (10), a crawling ladder (13) is arranged on the upper well body, a well shaft is closed or a cover plate is arranged, and a well cover is arranged;
j. the layers of backfill (14) are laminated to the ground within the trench.
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| CN111608245A (en) * | 2020-06-05 | 2020-09-01 | 合肥通泰晟管道科技有限公司 | Method for purifying and storing water by using urban inspection well |
| CN113748948A (en) * | 2020-06-05 | 2021-12-07 | 中国科学院城市环境研究所 | Rainwater garden building method based on scene perception theory |
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