Modularly-assembled catch basin and construction method thereof

Abstract

The invention belongs to the technical field of municipal engineering, and particularly relates to a modularly-assembled catch basin and a construction method thereof.The modularly-assembled catch basin comprises a water storage part, a water inlet part and a water seepage part; the water storage piece comprises a pipe body and a well bottom plate cast at the lower end of the pipe body; the water inlet piece comprises a well cover spliced at the upper end of a pipe body and an inclined pipe inserted into the side edge of the pipe body, a protective cover is integrally formed on the outer ring of the well cover, a well pipe is integrally formed at the upper end of the well cover, a first vertical shaft and a second vertical shaft are inserted into two holes formed in the upper surface of the inclined pipe, and well covers are installed at the upper ends of the well pipe, the inclined pipe and the first vertical shaft. Through the pipe body, the well cover, the protective cover, the well pipe, the inclined pipe, the first vertical shaft, the second vertical shaft and the well cover which are prefabricated parts, modular assembly of the catch basin is facilitated, the catch basin construction difficulty is lowered, water on a sidewalk permeates into the catch basin through the water seepage part through the water storage part, the water inlet part and the water seepage part, and water accumulation on the surface of the sidewalk is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of municipal engineering, and particularly relates to a modularly assembled rainwater well and a construction method thereof. BACKGROUND

[0002] In urban municipal construction, as a key component of the road drainage system, the structural design and construction method of the rainwater well directly affect the urban drainage efficiency and the stability of the sidewalk.

[0003] Traditional construction difficulties: the traditional rainwater well is mostly constructed on site, and the construction process is complex, requiring multiple links such as formwork erection, steel bar binding, and concrete pouring, which is obviously restricted by weather and site factors, and has a long construction period and high cost;

[0004] Limited drainage function: the existing rainwater well lacks systematic design for collecting rainwater on different pavements such as sidewalks, non-motor vehicle lanes, and motor vehicle lanes, often leading to poor water penetration on sidewalks or low drainage efficiency due to the concentration of rainwater on the pavement;

[0005] Insufficient structural stability: in the traditional water permeable structure, the water permeable layer material such as sandbags and fillers is prone to volume expansion and contraction due to changes in water storage, causing deformation and warping of the water permeable bricks above, affecting the safety and durability of the sidewalk;

[0006] Low degree of modularity: the components lack standardized prefabrication design, making it difficult to achieve rapid assembly and unable to meet the demand for efficient construction of modern municipal engineering;

[0007] The existing rainwater well has obvious deficiencies in construction efficiency, multi-scene rainwater collection capacity, structural stability, and modular assembly, and there is an urgent need for a rainwater well structure that can be prefabricated, multifunctional, and adaptable to different pavement drainage needs. SUMMARY

[0008] The application provides a modularly assembled rainwater well and a construction method thereof to overcome the deficiencies of the prior art.

[0009] A modularly assembled rainwater well includes a water storage component, a water inlet component, and a water permeable component.

[0010] The water storage component includes a pipe body and a well bottom plate cast and formed at the lower end of the pipe body.

[0011] The water inlet component includes a well cover assembled at the upper end of the pipe body and an inclined pipe inserted at the side of the pipe body, the well cover is integrally formed with a protective cover at the outer ring, the upper end of the well cover is integrally formed with a well pipe, two holes are formed in the upper surface of the inclined pipe, a first vertical shaft and a second vertical shaft are inserted into the holes, and a well cover is installed at the upper end of the well pipe, the inclined pipe, and the first vertical shaft.

[0012] The water seepage device comprises a gravel filler filled in a storage tank formed by a well cover and a shield, a fine gravel filler arranged above the gravel filler, a water absorption grid cotton arranged above the fine gravel filler, non-woven fabrics arranged between the gravel filler and the fine gravel filler and between the fine gravel filler and the water absorption grid cotton, water absorption cotton strips fixed to the lower surface of the water absorption grid cotton, and the water absorption cotton strips sequentially penetrating through the non-woven fabrics, the fine gravel filler, the non-woven fabrics, the gravel filler, holes formed on the surface of the well cover and extending to the inside of the pipe body.

[0013] Preferably, the pipe body, the well cover, the shield, the well pipe, the inclined pipe, the first vertical shaft, the second vertical shaft and the well cover are all prefabricated parts.

[0014] Preferably, the upper end of the pipe body is integrally formed with a limiting convex ring, and the lower surface of the connecting part of the well cover and the shield is formed with a limiting concave groove, and the limiting convex ring is inserted into the inside of the limiting concave groove.

[0015] Preferably, the one side surface of the pipe body is formed with a water inlet, the other side surface of the pipe body is formed with a water outlet, and the end of the inclined pipe is inserted into the inside of the water inlet.

[0016] Preferably, the angle between the axis of the inclined pipe and the horizontal plane is 5-15 degrees.

[0017] Preferably, the water absorption cotton strips fixed to the lower surface of the water absorption grid cotton are arranged in a ring array.

[0018] Preferably, the grid of the water absorption grid cotton is filled with sand fillers.

[0019] Preferably, the sand bag water permeable layer comprises a water permeable sand bag and a sand filler, and the sand filler is arranged in the water permeable sand bag.

[0020] A construction method of a modularly assembled rainwater well comprises the following steps:

[0021] S1. Foundation construction: performing foundation treatment at a predetermined position of a soil base layer, pouring a well bottom plate, and ensuring that the well bottom plate is horizontal and has sufficient bearing capacity;

[0022] S2. Water storage device installation: hoisting the prefabricated pipe body onto the well bottom plate, and tightly combining the pipe body with the connecting part of the well bottom plate formed by pouring;

[0023] S3. Water inlet device installation:

[0024] The prefabricated well cover is assembled at the upper end of the pipe body by matching the limiting convex ring at the upper end of the pipe body with the limiting concave groove on the lower surface of the well cover.

[0025] Insert the prefabricated end of the inclined pipe into the water inlet on the side of the pipe body, and ensure that the angle between the inclined pipe axis and the horizontal plane is 5-15 degrees;

[0026] Insert the first shaft and the second shaft into the holes respectively formed on the upper surface of the inclined pipe;

[0027] Install the well cover on the upper end of the well pipe, the inclined pipe and the first shaft respectively;

[0028] S4. Water seepage member construction:

[0029] Insert the lower end of the water-absorbing cotton strip into the hole formed on the surface of the well cover and extend to the inside of the pipe body, and suspend and fix the upper end of the water-absorbing cotton strip;

[0030] Fill the stone filler, lay the non-woven fabric, fill the fine stone filler, and lay the non-woven fabric in the storage tank formed by the well cover and the shield in sequence, so that the water-absorbing cotton strip passes through the stone filler, the non-woven fabric, the fine stone filler and the non-woven fabric;

[0031] Lay the water-absorbing grid cotton above the fine stone filler, and fix the water-absorbing grid cotton with the upper end of the water-absorbing cotton strip;

[0032] Fill the sand block in the grid of the water-absorbing grid cotton;

[0033] Lay the sand bag water permeable layer composed of water permeable sand bags and sand filler above the water-absorbing grid cotton;

[0034] Lay the water permeable bricks on the upper surface of the sand bag water permeable layer.

[0035] Preferably, in step S1, the foundation treatment depth is determined according to the soil bearing capacity, and the anchor structure connected with the pipe body is reserved when the well bottom plate is poured; in step S3, sealing glue or rubber ring is used for sealing treatment at the connection between the inclined pipe and the water inlet of the pipe body; in step S4, the non-woven fabric is laid to cover the entire storage tank cross section and the edge exceeds the edge of the storage tank by 5-15 cm, the overlapping length between adjacent non-woven fabrics is not less than 10 cm, the lower end of the water-absorbing cotton strip extends to the well bottom plate, and the surface of the sand bag water permeable layer is leveled before laying the water permeable bricks, and 2-3 mm gaps are reserved between the water permeable bricks and filled with fine sand.

[0036] Preferably, after the construction of steps S3 and S4 is completed, the sealing detection and water seepage performance test are performed on the connection parts of each component of the rainwater well.

[0037] Compared with the prior art, the beneficial effects of the present application are:

[0038] 1. Modular assembly and construction optimization

[0039] The pipe body, well cover, shroud, well pipe, inclined pipe, shaft and well cover are prefabricated parts, which can be mass-produced in a factory to ensure the accuracy and quality of the components and avoid the uncertainty of on-site pouring. Through modular assembly instead of traditional pouring, the construction process is simplified, the construction period is shortened, and the difficulty of on-site construction is reduced, which is especially suitable for scenes such as urban road reconstruction and expansion that require a high construction period.

[0040] 2. Multi-scene rainwater collection and drainage function

[0041] The water-permeable bricks, sandbag water-permeable layer, fine stone filler, stone filler and water-absorbing grid cotton form a graded water-permeable structure. The sidewalk rainwater is permeated into the pipe body through the water-permeable holes to avoid road surface water. The well pipe receives excess sidewalk rainwater, and the inclined pipe collects non-motor vehicle lane and motor vehicle lane rainwater through the first shaft and the second shaft respectively, realizing the centralized collection of multi-pavement rainwater. The well bottom plate and the pipe body form a water storage space, and the insertion design of the inclined pipe and the shaft ensures that the rainwater quickly flows into the pipe body, improving the drainage efficiency.

[0042] 3. Enhanced structural stability and durability

[0043] The water-absorbing grid cotton extends into the pipe body to absorb water, continuously replenishing the sandbag water-permeable layer, balancing its water storage capacity, avoiding volume expansion and contraction due to dry and wet changes, and preventing water-permeable brick deformation. Non-woven fabric is arranged between the stone filler and the fine stone filler, and between the fine stone filler and the water-absorbing grid cotton, which not only ensures the water-permeable effect, but also prevents the loss of filler particles, prolonging the service life of the rainwater well.

[0044] 4. Comprehensive technical advantages

[0045] The present application realizes the technical upgrading of the municipal rainwater well from "on-site construction" to "prefabrication and assembly" through modular prefabrication, multi-dimensional rainwater collection and structural stability design. It not only improves the drainage efficiency and construction efficiency, but also solves the problems of sidewalk water accumulation and pavement structure deformation, and has significant engineering application value and social benefits. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a part split structure diagram of the present application;

[0047] Figure 2 is a three-dimensional structure diagram of the present application;

[0048] Figure 3 is an implementation structure diagram of the present application;

[0049] Figure 4 is an implementation cross-sectional structure diagram of the present application;

[0050] Figure 5 is Figure 4 is an enlarged structure diagram of position A in the middle.

[0051] Fig. 1 is a well bottom plate; 2 is a pipe body; 3 is a well cover; 4 is a shield; 5 is a limiting convex ring; 6 is a limiting groove; 7 is a well pipe; 8 is an inclined pipe; 9 is a first vertical well; 10 is a second vertical well; 11 is a well cover; 12 is a water permeable hole; 13 is a gravel filler; 14 is a fine stone filler; 15 is a non-woven fabric; 16 is a water-absorbing mesh cotton; 17 is a water-absorbing cotton strip; 18 is a sand filler; 19 is a sandbag water-permeable layer; 191 is a water-permeable sandbag; 192 is a sand filler; 20 is a water inlet; 21 is a water outlet; 22 is a water-permeable brick; 23 is a non-motor vehicle lane; 24 is a motor vehicle lane; 25 is a soil base. DETAILED DESCRIPTION

[0052] The technical solutions of the present application will be described below in combination with the drawings and examples.

[0053] Please refer to Figures 1-5 The embodiment provides the following technical solutions: a modularly assembled rainwater well comprising a water storage part, a water inlet part and a water permeable part;

[0054] The water storage part comprises a pipe body 2 and a well bottom plate 1 cast and formed at the lower end of the pipe body 2.

[0055] The water inlet part comprises a well cover 3 assembled at the upper end of the pipe body 2 and an inclined pipe 8 inserted at the side of the pipe body 2, the well cover 3 is integrally formed with a shield 4 at the outer ring thereof, the upper end of the well cover 3 is integrally formed with a well pipe 7, two holes opened on the upper surface of the inclined pipe 8 are inserted with a first vertical well 9 and a second vertical well 10, and the well pipe 7, the inclined pipe 8 and the upper end of the first vertical well 9 are all installed with a well cover 11.

[0056] The water permeable part comprises a gravel filler 13 filled in the storage tank formed by the well cover 3 and the shield 4, a fine stone filler 14 arranged above the gravel filler 13, a water-absorbing mesh cotton 16 arranged above the fine stone filler 14, a non-woven fabric 15 arranged between the gravel filler 13 and the fine stone filler 14 and between the fine stone filler 14 and the water-absorbing mesh cotton 16, a water-absorbing cotton strip 17 fixed on the lower surface of the water-absorbing mesh cotton 16, the water-absorbing cotton strip 17 sequentially penetrating through the non-woven fabric 15, the fine stone filler 14, the non-woven fabric 15, the gravel filler 13, the hole opened on the surface of the well cover 3 and extending to the inside of the pipe body 2, a water permeable hole 12 opened on the surface of the well cover 3 for water permeation, a sandbag water-permeable layer 19 arranged above the water-absorbing mesh cotton 16, and a water-permeable brick 22 arranged on the upper surface of the sandbag water-permeable layer 19.

[0057] Among them, the pipe body 2, the well cover 3, the shield 4, the well pipe 7, the inclined pipe 8, the first vertical well 9, the second vertical well 10 and the well cover 11 are all prefabricated parts.

[0058] In this embodiment, the pipe body 2, the well cover 3, the protective cover 4, the well pipe 7, the inclined pipe 8, the first vertical well 9, the second vertical well 10 and the well cover 11 are used for facilitating the modular assembly of the rainwater well, simplifying the construction difficulty of the rainwater well, and the water storage part, the water inlet part and the water infiltration part are used for realizing the infiltration of the water on the sidewalk into the rainwater well through the water infiltration part, avoiding the surface water of the sidewalk, and the surface water of the sidewalk, the non-motor vehicle lane 23 and the motor vehicle lane 24 is collected through the water inlet part, facilitating the collection of the rainwater on the road surface, and the lower end of the pipe body 2 is cast into the well bottom plate 1, so that the well bottom plate 1 and the pipe body 2 form the water storage part, facilitating the storage of the collected rainwater, the water inlet part includes the well cover 3, the protective cover 4, the well pipe 7, the inclined pipe 8, the first vertical well 9, the second vertical well 10 and the well cover 11, the well cover 3 is spliced on the upper portion of the pipe body 2, facilitating the flow of the excessive water on the sidewalk into the pipe body 2 through the upper end of the well pipe 7, the water on the non-motor vehicle lane 23 flows into the inclined pipe 8 through the first vertical well 9, and the water on the motor vehicle lane 24 flows into the inclined pipe 8 through the second vertical well 10, facilitating the flow of the water in the inclined pipe 8 into the pipe body 2, realizing the collection of the rainwater, and the water infiltration part is composed of the water-permeable hole 12, the gravel filler 13, the fine stone filler 14, the non-woven fabric 15, the water-absorbing grid cotton 16, the water-absorbing cotton bar 17, the sandbag water-permeable layer 19 and the water-permeable brick 22, the water-absorbing cotton bar 17 fixed on the lower surface of the water-absorbing grid cotton 16 extends into the pipe body 2 to absorb water, facilitating the water replenishment of the sandbag water-permeable layer 19 by the water-absorbing grid cotton 16, avoiding the volume change of the sandbag water-permeable layer 19 due to the change of the stored water, thereby avoiding the deformation of the water-permeable brick 22 due to the volume change of the sandbag water-permeable layer 19, and improving the stability of the sidewalk, and the sandbag water-permeable layer 19, the fine stone filler 14 and the gravel filler 13 make the water infiltrated from the water-permeable brick 22 to be graded, facilitating the infiltration of the water into the pipe body 2 through the water-permeable hole 12 on the surface of the well cover 3, and realizing the collection of the rainwater.

[0059] Specifically, the upper end of the pipe body 2 is integrally formed with a limiting convex ring 5, the lower surface of the connection part of the well cover 3 and the protective cover 4 is provided with a limiting concave groove 6, and the limiting convex ring 5 is inserted into the inside of the limiting concave groove 6.

[0060] The limiting convex ring 5 integrally formed on the upper end of the pipe body 2 and the limiting concave groove 6 provided on the lower surface of the connection part of the well cover 3 and the protective cover 4 make the limiting convex ring 5 inserted into the inside of the limiting concave groove 6 when the well cover 3 is installed on the upper end of the pipe body 2, realizing the quick assembly of the pipe body 2 and the well cover 3.

[0061] Specifically, the one side surface of the pipe body 2 is provided with a water inlet 20, the other side surface of the pipe body 2 is provided with a water outlet 21, the end of the inclined pipe 8 is inserted into the inside of the water inlet 20, and the angle between the axis of the inclined pipe 8 and the horizontal plane is 5-15 degrees, facilitating the flow of the water in the inclined pipe 8 into the pipe body 2.

[0062] Specifically, there are a plurality of circular arrays of absorbent cotton strips 17 fixed on the lower surface of the absorbent mesh cotton 16 , so that the absorbent cotton strips 17 can replenish water to the sandbag permeable layer 19 through the absorbent mesh cotton 16 after absorbing water.

[0063] Specifically, the meshes of the water-absorbing mesh cotton 16 are filled with sand blocks 18 .

[0064] Specifically, the sandbag permeable layer 19 includes a permeable sandbag 191 and a sand filler 192 , and the sand filler 192 is arranged in the permeable sandbag 191 .

[0065] A construction method for a modular assembled rainwater well comprises the following steps:

[0066] S1 foundation construction: foundation treatment at a predetermined location in the soil base 25, pouring the well floor 1, and ensure that the well floor 1 is level and has sufficient bearing capacity;

[0067] S2. Water storage installation: The prefabricated pipe body 2 is hoisted onto the well bottom plate 1, so that the pipe body 2 and the well bottom plate 1 are tightly combined with the cast connection portion;

[0068] S3. Water inlet installation:

[0069] The prefabricated manhole cover 3 is assembled on the upper end of the pipe body 2 by matching the limiting groove 6 on its lower surface with the limiting convex ring 5 on the upper end of the pipe body 2;

[0070] Insert the end of the prefabricated inclined tube 8 into the water inlet 20 on the side of the tube body 2, and ensure that the angle between the axis of the inclined tube 8 and the horizontal plane is 5-15 degrees;

[0071] The first vertical shaft 9 and the second vertical shaft 10 are respectively inserted into the holes opened on the upper surface of the inclined tube 8;

[0072] Install manhole covers 11 on the upper ends of the well pipe 7, the inclined pipe 8 and the first vertical shaft 9 respectively;

[0073] S4. Construction of water seepage parts:

[0074] The lower end of the absorbent cotton strip 17 is extended from the hole opened on the surface of the well cover 3 to the inside of the pipe body 2, and the upper end of the absorbent cotton strip 17 is suspended and fixed;

[0075] The storage tank formed by the well cover 3 and the protective cover 4 is sequentially filled with stone filler 13, laid with non-woven fabric 15, filled with fine stone filler 14, and laid with non-woven fabric 15, and the absorbent cotton strip 17 is passed through the stone filler 13, non-woven fabric 15, fine stone filler 14, and non-woven fabric 15;

[0076] Lay the absorbent mesh cotton 16 on top of the fine stone filler 14, and fix the absorbent mesh cotton 16 to the upper end of the absorbent cotton strip 17;

[0077] Fill the sand block 18 in the grid of the water-absorbing grid cotton 16;

[0078] Lay the sandbag water-permeable layer 19 composed of water-permeable sandbags 191 and sand fillers 192 above the water-absorbing grid cotton 16;

[0079] Lay the water-permeable bricks 22 on the upper surface of the sandbag water-permeable layer 19.

[0080] Specifically, in step S1, the foundation treatment depth is determined according to the soil bearing capacity, and the anchor structure connected with the pipe body 2 is reserved when the well bottom plate 1 is poured; in step S3, the sealing glue or rubber ring is used for sealing treatment at the connection between the inclined pipe 8 and the water inlet 20 of the pipe body 2; in step S4, the non-woven fabric 15 needs to cover the entire cross section of the storage tank and the edge exceeds the edge of the storage tank by 5-10 cm when laid, the overlapping length between adjacent non-woven fabrics 15 is not less than 10 cm, the lower end of the water-absorbing cotton strip 17 extends to the well bottom plate 1, the surface of the sandbag water-permeable layer 19 is leveled before the water-permeable bricks 22 are laid, and 2-3 mm gaps are reserved between the water-permeable bricks 22 and filled with fine sand.

[0081] Specifically, after the completion of steps S3 and S4, the sealing detection and water permeability test are performed on the connection parts of the components of the rainwater well.

[0082] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A modular assembled rainwater well, characterized by: Including water storage parts, water inlet parts and water seepage parts; The water storage component comprises a pipe body (2) and a well bottom plate (1) cast at the lower end of the pipe body (2); The water inlet component comprises a well cover (3) assembled at the upper end of the pipe body (2), and an inclined pipe (8) plugged into the side of the pipe body (2); a protective cover (4) is integrally formed on the outer ring of the well cover (3); a well pipe (7) is integrally formed on the upper end of the well cover (3); a first vertical shaft (9) and a second vertical shaft (10) are plugged into two holes opened on the upper surface of the inclined pipe (8); and a well cover (11) is installed on the upper ends of the well pipe (7), the inclined pipe (8) and the first vertical shaft (9); The water seepage member includes a stone filler (13) filled in a storage tank formed by a well cover (3) and a protective cover (4), a fine stone filler (14) is arranged above the stone filler (13), a water-absorbing mesh cotton (16) is arranged above the fine stone filler (14), non-woven fabrics (15) are arranged between the stone filler (13) and the fine stone filler (14) and between the fine stone filler (14) and the water-absorbing mesh cotton (16), and a water-absorbing mesh cotton (16) is fixed on the lower surface of the water-absorbing mesh cotton (16). A water-absorbing cotton strip (17) is sequentially passed through the non-woven fabric (15), the fine stone filler (14), the non-woven fabric (15), the stone filler (13), and the holes opened on the surface of the well cover (3) and extends to the interior of the pipe body (2); the surface of the well cover (3) is provided with a water-permeable hole (12) for water permeation; a sandbag water-permeable layer (19) is provided above the water-absorbing mesh cotton (16); and a water-permeable brick (22) is provided on the upper surface of the sandbag water-permeable layer (19); The pipe body (2), the well cover (3), the protective cover (4), the well pipe (7), the inclined pipe (8), the first vertical shaft (9), the second vertical shaft (10) and the well cover (11) are all prefabricated parts.

2. A modular assembled rainwater well according to claim 1, characterized in that: A limiting convex ring (5) is integrally formed at the upper end of the pipe body (2), a limiting groove (6) is provided on the lower surface of the connection between the well cover (3) and the protective cover (4), and the limiting convex ring (5) is inserted into the interior of the limiting groove (6).

3. The modular assembled rainwater well according to claim 1, characterized in that: A water inlet (20) is provided on one side surface of the tube body (2), a water outlet (21) is provided on the other side surface of the tube body (2), and the end of the inclined tube (8) is inserted into the interior of the water inlet (20).

4. The modular assembled rainwater well according to claim 3, characterized in that: The angle between the axis of the inclined tube (8) and the horizontal plane is 5-15 degrees.

5. The modular assembled rainwater well according to claim 1, characterized in that: There are a plurality of annular arrays of absorbent cotton strips (17) fixed on the lower surface of the absorbent mesh cotton (16).

6. The modular assembled rainwater well according to claim 1, characterized in that: The mesh of the water-absorbing mesh cotton (16) is filled with sand filling blocks (18).

7. The modular assembled rainwater well according to claim 1, characterized in that: The sandbag water-permeable layer (19) comprises a water-permeable sandbag (191) and a sand filler (192), wherein the sand filler (192) is arranged inside the water-permeable sandbag (191).

8. A construction method for a modular rainwater well, comprising the rainwater well according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Foundation construction: perform foundation treatment at a predetermined location on the soil base (25), cast the well bottom plate (1), and ensure that the well bottom plate (1) is level and has sufficient bearing capacity; S2. Installation of water storage parts: hoist the prefabricated pipe body (2) onto the well bottom plate (1), so that the pipe body (2) and the well bottom plate (1) are tightly combined with the cast connection portion; S3. Water inlet installation: The prefabricated well cover (3) is assembled on the upper end of the pipe body (2) by fitting the limiting groove (6) on the lower surface of the well cover (3) with the limiting convex ring (5) on the upper end of the pipe body (2); Insert the end of the prefabricated inclined tube (8) into the water inlet (20) on the side of the tube body (2), and ensure that the angle between the axis of the inclined tube (8) and the horizontal plane is 5-15 degrees; The first vertical shaft (9) and the second vertical shaft (10) are respectively inserted into the holes opened on the upper surface of the inclined tube (8); Installing manhole covers (11) at the upper ends of the well pipe (7), the inclined pipe (8) and the first vertical shaft (9); S4. Construction of water seepage parts: The lower end of the absorbent cotton strip (17) is extended from the hole opened on the surface of the well cover (3) to the inside of the pipe body (2), and the upper end of the absorbent cotton strip (17) is suspended and fixed; The storage tank formed by the well cover (3) and the protective cover (4) is sequentially filled with stone filler (13), laid with non-woven fabric (15), filled with fine stone filler (14), and laid with non-woven fabric (15), and the absorbent cotton strip (17) is passed through the stone filler (13), non-woven fabric (15), fine stone filler (14), and non-woven fabric (15); Lay the absorbent mesh cotton (16) on top of the fine stone filler (14), and fix the absorbent mesh cotton (16) and the upper end of the absorbent cotton strip (17); Filling the mesh of the absorbent mesh cotton (16) with sand blocks (18); A sandbag permeable layer (19) consisting of a permeable sandbag (191) and a sand filler (192) is laid on top of the water-absorbing mesh cotton (16); Permeable bricks (22) are laid on the upper surface of the sandbag permeable layer (19).

9. The construction method of a modular assembled rainwater well according to claim 8, characterized in that: In step S1, the depth of foundation treatment is determined according to the bearing capacity of the soil, and an anchoring structure connected to the pipe body (2) is reserved when the well bottom plate (1) is cast; in step S3, the connection between the inclined pipe (8) and the water inlet (20) of the pipe body (2) is sealed with a sealant or a rubber ring; in step S4, the non-woven fabric (15) is laid to cover the entire cross-section of the storage tank and the edge exceeds the edge of the storage tank by 5-10 cm, the overlap length between adjacent non-woven fabrics (15) is not less than 10 cm, the lower end of the absorbent cotton strip (17) extends to the well bottom plate (1), and before the permeable bricks (22) are laid, the surface of the sandbag permeable layer (19) is first leveled, and a 2-3 mm gap is reserved between the permeable bricks (22) and filled with fine sand.

10. The construction method of a modular assembled rainwater well according to claim 9, characterized in that: After steps S3 and S4 are completed, the connection parts of the rainwater well components are tested for sealing and water seepage performance.

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