CN209817036U - Prefabricated drop wells suitable for urban drainage pipe network - Google Patents

Abstract

The utility model discloses an assembled water drop well suitable for urban drainage pipe networks, which comprises a water drop well body which is assembled in sections. Section and the well upper section above the water inlet section; the energy dissipation section, the water inlet section and the upper well upper section are surrounded by a well chamber, and a partition is arranged in the well chamber, and the partition board divides the well chamber into Water drop energy dissipation well chamber and maintenance well chamber; the bottom of the energy dissipation section is provided with a bottom plate, and the energy dissipation section is provided with a water outlet hole located in the water drop energy dissipation well chamber, and the lowest point of the water outlet hole It is located above the bottom plate and forms a drop water energy dissipation area between the water outlet hole and the bottom plate; the side wall of the water inlet section is provided with at least one inlet in the drop water energy dissipation well. Water hole; a socket assembly structure is adopted between two adjacent sections of the drop well body, and a partition for assembling the partition in the well chamber is provided between the inner wall of the well chamber and the partition plate board assembly structure.

Description

Prefabricated drop wells suitable for urban drainage pipe network

technical field

The utility model belongs to the technical field of urban drainage structures, in particular to an assembled drop well suitable for urban drainage pipe networks.

Background technique

Most of the municipal drainage pipe network is arranged in the form of branch pipe collection, main pipe transportation, and inspection wells. Due to the large difference in terrain elevation or when the branch pipes are connected to the main pipes that are buried too deeply, urban drainage pipes will have a large drop head. In order to prevent the water velocity in the pipeline from exceeding the flushing velocity, a drop well is often used to improve the hydraulic conditions of the pipeline. Article 4.4.1 of "Code for Design of Outdoor Drainage" (GB50014-2006) (2016 Edition) stipulates that the location of the inspection well should be at the intersection of pipelines, at the turn, at the change of pipe diameter or slope, at the drop point, and on the straight pipe section. at certain distances. Article 4.5.1 stipulates that when the water drop head of the pipeline is 1.0m-2.0m, a water drop well should be installed; when the water drop head is greater than 2.0m, a water drop well should be installed.

The terrain of mountainous cities is undulating, and there are many vertical sections of the drainage pipe network, so a large number of drop wells need to be installed; while the traditional drop wells use reinforced concrete cast-in-place technology, the construction period is long, and the construction quality is limited by the level of on-site construction. together. According to the "Guiding Opinions on Vigorously Developing Prefabricated Buildings" issued by the State Council in September 2016, we will strive to make the proportion of prefabricated buildings reach 30% within 10 years; Fully promote the development of prefabricated buildings. However, due to the characteristics of the drop well process, the overall volume of the drop well is large, and the convenience of transportation and hoisting must be considered when adopting the assembly process. Therefore, there is no prefabricated drop well in the construction of municipal drainage projects.

Contents of the invention

For the drainage pipe network in mountainous cities, the pipe diameter of the sewage pipe network under the road is mostly smaller than d800, and the pipe diameter of most rainwater pipelines is also smaller than d800. Convenience issue. In view of this, the purpose of the utility model is to provide a prefabricated drop well suitable for urban drainage pipe network. In order to achieve the above object, the utility model provides the following technical solutions:

An assembled water drop well suitable for urban drainage pipe network, comprising a water drop well body assembled in sections, the water drop well body includes an energy dissipation section located at the lower part, and a water inlet section located above the energy dissipation section and the well upper section above the water inlet section; a well chamber is formed between the energy dissipation section, the water inlet section and the well upper section, and a partition is arranged in the well chamber, and the partition divides the well The chamber is divided into a water drop energy dissipation well chamber and an inspection well chamber;

The bottom of the energy dissipation section is provided with a bottom plate, and the energy dissipation section is provided with a water outlet hole in the chamber of the falling water energy dissipation well, the lowest point of the water outlet hole is located above the bottom plate, and in the A drop water energy dissipation area is formed between the water outlet hole and the bottom plate; at least one water inlet hole located in the drop water energy dissipation well chamber is provided on the side wall of the water inlet section;

A socket assembly structure is adopted between two adjacent sections of the drop well body, and a partition assembly structure for assembling the partition in the well chamber is provided between the inner wall of the well chamber and the partition plate .

Further, the water inlet section is configured as at least one section.

Further, between the energy dissipation section (1) and the water inlet section (2), between two adjacent sections of the water inlet section (2) and/or between the water inlet section (2) and the An adjustment section (28) for adjusting the elevation of the water inlet hole (11) is provided between the upper sections (3) of the well.

Further, a top plate is provided on the top of the upper section of the well; a manhole is provided on the top plate above the maintenance well chamber, and a well ring is provided on the upper section of the well corresponding to the manhole.

Further, a manhole cover is installed on the well ring.

Further, an inspection manhole for connecting the falling water energy dissipation well chamber and the inspection well chamber is provided on the partition, and the lowest point of the inspection manhole is located above the lowest point of the water outlet hole.

Furthermore, a partition board is provided in the maintenance well, and the partition board is located below the maintenance manhole or flush with the lowest point of the maintenance manhole.

Further, there is an elevation difference between the partition board and the bottom plate, and a tool room is formed between the partition board and the bottom board, and a partition for operation and maintenance personnel to pass is provided on the partition board. A layer plate hole, a sealing cover is installed on the spacer plate hole.

Further, a pad for placing tools is provided in the tool room.

Further, the socket assembly structure includes a socket and a socket that cooperate with each other, and a sealing ring is provided between the socket and the socket.

Further, among the two mating surfaces between two adjacent sections of the plunger well body, one of the mating surfaces is provided with a groove and forms the socket, and the other mating surface is provided with the socket. a protrusion that fits into said groove and forms said socket; and/or,

Among the adjacent two sections of the falling well body, the outer wall of the end of one section of the falling well body is provided with a limit stop wall surrounding a circle, and the other section of the falling well body is provided with a stop wall that is in line with the limiting wall. The insertion section matched with the blocking wall, and hemp asphalt is arranged between the inner wall of the limit blocking wall and the outer wall of the insertion section.

Further, connecting seats are respectively provided between adjacent two sections of the falling well body, and connecting holes are provided in the connecting seats, and when the two sections of the falling well body are assembled in place, the two correspondingly arranged The connecting holes in the connecting seats are coaxial, and the two connecting seats are fixedly connected by tie bolts.

Further, the partition assembly structure includes an assembly slot arranged in the well chamber and matched with the partition, and a sealing rubber is provided between the assembly slot and the partition.

The beneficial effects of the utility model are:

The utility model is suitable for the prefabricated water drop well of the urban drainage pipe network. By dividing the body of the water drop well into three sections: the energy dissipation section, the water inlet section and the upper section of the well, the water drop well can be prefabricated in the factory, and then the water drop well Each section of the main body is transported to the construction site for hoisting and assembly, and has the following advantages:

(1) In view of the small size of the drop wells and the large number of drop wells in the drainage pipe network in mountainous cities, the assembly process is adopted to shorten the construction period of the drop wells and the drainage pipe network;

(2) Change the problem of poor construction quality of the traditional cast-in-place process of the drop well, and improve the prefabrication and assembly rate of the pipe network;

(3) The components are prefabricated and assembled on site, which is convenient for transportation and hoisting;

(4) Solve the structural stability and anti-seepage problems of each component;

(5) Use partitions to separate the water drop well chamber into a water drop energy dissipation well chamber and an inspection well chamber, and the inspection well chamber is a dry area to improve the working environment of operation and maintenance personnel and ensure maintenance safety;

(6) Set up a tool room in the water well to ensure the completeness of accessories for later operation and maintenance and the correspondence between accessories and structures.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the utility model clearer, the utility model provides the following drawings for illustration:

Fig. 1 is the structure schematic diagram of embodiment 1 of the assembled type falling well of the utility model applicable to the urban drainage pipe network;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a structural schematic diagram of the socket assembly structure of the present embodiment;

Fig. 4 is a schematic diagram of the screw connection structure between two adjacent sections of the present embodiment;

Fig. 5 is a structural schematic diagram of embodiment 2 of the assembled water drop well suitable for urban drainage pipe network of the present invention, specifically, a structural schematic diagram of when the limit retaining wall in the socket assembly structure is set at the bottom;

Fig. 6 is a structural schematic diagram of when the limit retaining wall in the socket assembly structure is set above for a period of time;

Fig. 7 is a structural schematic diagram when a limit stop wall and a groove are set at the same time;

Fig. 8 is a schematic structural view of Embodiment 3 of the prefabricated drop well of the present invention applicable to urban drainage pipe networks.

Explanation of reference signs:

1-energy dissipation section; 1a-bottom plate; 2-inlet section; 3-well upper section; 3a-roof; 4-partition; 5-drop water energy dissipation well room; 7-manhole; 8-well ring; 9-outlet hole; 10-drop water energy dissipation area; 10a-pebble layer; 11-water inlet; 12-manhole for maintenance; 13-well cover; 15-tool room; 16-interlayer plate hole; 17-sealing cover; 18-cushion layer; 19-socket; 20-socket; 21-sealing ring; - Assembly card slot; 25 - sealing rubber; 26 - connecting seat; 27 - counterbore; 28 - adjusting section.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model.

Example 1

As shown in FIG. 1 , it is a structural schematic diagram of Embodiment 1 of the prefabricated drop well of the present invention applicable to urban drainage pipe network. The prefabricated water drop well applicable to the urban drainage pipe network of this embodiment includes a water drop well body assembled in sections, the water drop well body includes an energy dissipation section 1 located at the lower part, and a water inlet section located above the energy dissipation section 1 2 and the wellbore section 3 above the water inlet section 2. The energy dissipation section 1, the water inlet section 2 and the well upper section 3 form a well chamber, and the well chamber is provided with a partition 4, which divides the well chamber into a water drop energy dissipation well chamber 5 and an inspection well chamber 6. The bottom of the energy dissipation section 1 of this embodiment is provided with a bottom plate 1a, and the energy dissipation section 1 is provided with a water outlet hole 9 located in the drop water energy dissipation well chamber 5, the lowest point of the water outlet hole 9 is located above the bottom plate 1a, and A falling water energy dissipation zone 10 is formed between the water outlet hole 9 and the bottom plate 1a. In this embodiment, a pebble layer 10a is provided in the falling water energy dissipation zone 10, which can realize the purpose of falling water energy dissipation. The side wall of the water inlet section 2 is provided with at least one water inlet hole 11 located in the drop water energy dissipation well chamber 5, and the side wall of the water inlet section 2 of this embodiment is provided with at least one water inlet hole 11 located in the drop water energy dissipation well chamber 5, the water inlet 11 in the water inlet section 2 of this embodiment is provided with two water inlet holes 11 on the side wall, and the axes of the two water inlet holes 11 are perpendicular to each other and are respectively located on the two sides of the water inlet section 2. on the wall. The socket assembly structure is adopted between two adjacent sections of the plunger well body in this embodiment, and a partition assembly structure for assembling the partition plate 4 in the well chamber is provided between the inner wall of the well chamber and the partition plate 4 .

Further, the water inlet section 2 is set as at least one section, and the water inlet section 2 of this embodiment is set as one section. Of course, according to the actual construction environment requirements, if there are multiple water inlet pipes and the elevation difference between the water inlet pipes is large, The water inlet sections can be respectively set to correspond to water inlet pipes of different elevations.

Further, a roof 3a is provided on the top of the upper section 3 of the shaft; a manhole 7 is provided on the roof 3a above the maintenance well chamber 6, and a well collar 8 is provided on the upper section 3 of the shaft corresponding to the manhole 7, and on the well collar 8 The installation is provided with a well cover 13 . In this embodiment, the well collar 8 and the upper section 3 of the well are set separately and prefabricated separately, but in some embodiments, the well collar 8 and the upper section 3 of the well can also be integrally formed, the principle is equivalent and will not be repeated here. .

Further, the partition plate 4 is provided with a maintenance manhole 12 for connecting the falling water energy dissipation well chamber 5 and the maintenance well chamber 6 , and the lowest point of the maintenance manhole 12 is above the lowest point of the water outlet hole 9 . The maintenance well chamber 6 of this embodiment is provided with a partition board 14 , and the partition board 14 is located below the maintenance manhole 12 or flush with the lowest point of the maintenance manhole 12 . Ladders 6a are provided on the inner wall of the maintenance well chamber 5 in this embodiment, and ladders 6a are also provided on the two side walls of the partition 4 below the maintenance manhole 12 to facilitate the entry and exit of operation and maintenance personnel.

Further, there is an elevation difference between the partition board 14 and the base plate 1a, and a tool room 15 is formed between the partition board 14 and the bottom board 1a, and the partition board 14 is provided with a partition board hole 16 for operation and maintenance personnel to pass through , A sealing cover 17 is installed on the hole 16 of the interlayer plate. The tool room 15 in this embodiment is provided with a cushion layer 18 for placing tools. By setting up the tool room 15, it is ensured that the accessories for later operation and maintenance are complete and the correspondence between accessories and structures is ensured.

Further, the socket assembly structure of this embodiment includes a socket 19 and a socket 20 that cooperate with each other, and a sealing ring 21 is provided between the socket 19 and the socket 20 . Specifically, among the two mating surfaces between two adjacent sections of the drop well body, one of the mating surfaces is provided with a groove and forms a socket 19, and the other mating surface is provided with a protrusion matched with the groove and A socket 20 is formed. In the two mating surfaces between the adjacent two sections of the plunger well body in this embodiment, grooves are arranged on the mating surface located below, a protrusion is arranged on the mating surface located above, and the groove and the protrusion are arranged. Install sealing ring 21 between, realize the technical purpose of anti-leakage.

Further, connecting seats 26 are respectively provided between adjacent two sections of the water-falling well body, and connection holes are provided in the connecting seats 26, and when the two-section water-falling well bodies are assembled in place, the correspondingly arranged two connecting seats 26 The connecting holes are coaxial, and a tie bolt is fixedly connected between the two connecting seats 26 . The connecting seats 26 in this embodiment are respectively arranged at the diagonal positions between the energy dissipation section 1, the water inlet section 2 and the upper section 3 of the well, which can effectively enhance the connection strength, and the end of the connecting hole is provided with a counterbore 27, The screw head and the nut of the tie bolt are located in the counterbore 27 respectively, and the inside and outside of the counterbore are coated with asphalt to avoid corrosion.

Further, the partition assembly structure of this embodiment includes an assembly slot 24 arranged in the well chamber and matched with the partition 4 , and a sealing rubber 25 is provided between the assembly slot 24 and the partition 4 . The assembly slots 24 are correspondingly arranged on the inner walls of the energy dissipation section 1, the water inlet section 2 and the upper shaft section 3. When in use, the partition plate 4 is inserted into the assembly slots 24 and the sealing rubber 25 is installed, which is simple and convenient to install.

The prefabricated water drop well applicable to the urban drainage pipe network of this embodiment divides the water drop well body into three sections: the energy dissipation section, the water inlet section and the top section of the well, so that the water drop well can be prefabricated in the factory Each section of the main body is transported to the construction site for hoisting and assembly, and has the following advantages:

(1) In view of the small size of the drop wells and the large number of drop wells in the drainage pipe network in mountainous cities, the assembly process is adopted to shorten the construction period of the drop wells and the drainage pipe network;

(2) Change the problem of poor construction quality of the traditional cast-in-place process of the drop well, and improve the prefabrication and assembly rate of the pipe network;

(3) The components are prefabricated and assembled on site, which is convenient for transportation and hoisting;

(4) Solve the structural stability and anti-seepage problems of each component;

(5) Use partitions to separate the water drop well chamber into a water drop energy dissipation well chamber and an inspection well chamber, and the inspection well chamber is a dry area to improve the working environment of operation and maintenance personnel and ensure maintenance safety;

(6) Set up a tool room in the water well to ensure the completeness of accessories for later operation and maintenance and the correspondence between accessories and structures.

Example 2

As shown in FIG. 1 , it is a structural schematic diagram of Embodiment 1 of the prefabricated drop well of the present invention applicable to urban drainage pipe network. The prefabricated water drop well applicable to the urban drainage pipe network of this embodiment includes a water drop well body assembled in sections, the water drop well body includes an energy dissipation section 1 located at the lower part, and a water inlet section located above the energy dissipation section 1 2 and the wellbore section 3 above the water inlet section 2. The energy dissipation section 1, the water inlet section 2 and the well upper section 3 form a well chamber, and the well chamber is provided with a partition 4, which divides the well chamber into a water drop energy dissipation well chamber 5 and an inspection well chamber 6. The bottom of the energy dissipation section 1 of this embodiment is provided with a bottom plate 1a, and the energy dissipation section 1 is provided with a water outlet hole 9 located in the drop water energy dissipation well chamber 5, the lowest point of the water outlet hole 9 is located above the bottom plate 1a, and A falling water energy dissipation zone 10 is formed between the water outlet hole 9 and the bottom plate 1a. In this embodiment, a pebble layer 10a is provided in the falling water energy dissipation zone 10, which can realize the purpose of falling water energy dissipation. The side wall of the water inlet section 2 is provided with at least one water inlet hole 11 located in the drop water energy dissipation well chamber 5, and the side wall of the water inlet section 2 of this embodiment is provided with at least one water inlet hole 11 located in the drop water energy dissipation well chamber 5, the water inlet 11 in the water inlet section 2 of this embodiment is provided with two water inlet holes 11 on the side wall, and the axes of the two water inlet holes 11 are perpendicular to each other and are respectively located on the two sides of the water inlet section 2. on the wall. The socket assembly structure is adopted between two adjacent sections of the plunger well body in this embodiment, and a partition assembly structure for assembling the partition plate 4 in the well chamber is provided between the inner wall of the well chamber and the partition plate 4 .

Further, the socket assembly structure of this embodiment includes a socket 19 and a socket 20 that cooperate with each other, and a sealing ring 21 is provided between the socket 19 and the socket 20 . Among the adjacent two sections of the water-falling well body in this embodiment, the end outer wall of one of the water-falling well bodies is provided with a limit stop wall 22 surrounding a circle, and the other section of the water-fall well body is provided with a limit stop wall 22 For the mated insertion section, hemp asphalt 23 is arranged between the inner wall of the limit stop wall 22 and the outer wall of the insertion section. That is, the limit stop wall 22 forms the socket 19, and the insertion section forms the socket. Specifically, in the two adjacent sections of the drop well body, a limit stop wall 22 is arranged on the outer peripheral wall of the section below, and the upper end of the limit stop wall 22 extends upward beyond the end of the section below, and is located at the top. One section is directly inserted into the limit retaining wall 22 to realize socket assembly, as shown in FIG. 5 . Of course, it is also possible to adopt: in the two adjacent sections of the drop well body, a limit stop wall 22 is arranged on the outer peripheral wall of the upper section, and the lower end of the limit stop wall 22 extends downward to extend out of the end of the upper section. In addition, the lower section is directly inserted into the limiting retaining wall 22 to realize socket assembly, as shown in FIG. 6 . In addition, while the limit stop wall 22 is provided, a groove and a protrusion can also be provided between two adjacent mating surfaces, as shown in FIG. 7 , the principle is equivalent and will not be repeated here.

Other structures of this embodiment are the same as those of Embodiment 1, and will not be repeated one by one.

Example 3

As shown in FIG. 8 , it is a structural schematic diagram of Embodiment 3 of the prefabricated drop well of the present invention applicable to urban drainage pipe network. The prefabricated water drop well applicable to the urban drainage pipe network in this embodiment of this embodiment includes the body of the water drop well assembled in sections, the body of the water drop well includes the energy dissipation section 1 at the lower part, and the energy dissipation section 1 above. The water inlet section 2 and the wellbore section 3 above the water inlet section 2. The energy dissipation section 1, the water inlet section 2 and the well upper section 3 form a well chamber, and the well chamber is provided with a partition 4, which divides the well chamber into a water drop energy dissipation well chamber 5 and an inspection well chamber 6. The bottom of the energy dissipation section 1 of this embodiment is provided with a bottom plate 1a, and the energy dissipation section 1 is provided with a water outlet hole 9 located in the drop water energy dissipation well chamber 5, the lowest point of the water outlet hole 9 is located above the bottom plate 1a, and A falling water energy dissipation zone 10 is formed between the water outlet hole 9 and the bottom plate 1a. In this embodiment, a pebble layer 10a is provided in the falling water energy dissipation zone 10, which can realize the purpose of falling water energy dissipation. The side wall of the water inlet section 2 is provided with at least one water inlet hole 11 located in the drop water energy dissipation well chamber 5, and the side wall of the water inlet section 2 of this embodiment is provided with at least one water inlet hole 11 located in the drop water energy dissipation well chamber 5, the water inlet 11 in the water inlet section 2 of this embodiment is provided with two water inlet holes 11 on the side wall, and the axes of the two water inlet holes 11 are perpendicular to each other and are respectively located on the two sides of the water inlet section 2. on the wall. The socket assembly structure is adopted between two adjacent sections of the plunger well body in this embodiment, and a partition assembly structure for assembling the partition plate 4 in the well chamber is provided between the inner wall of the well chamber and the partition plate 4 .

Further, the water inlet section 2 is set as at least one section, and the water inlet section 2 of this embodiment is set as one section. Of course, according to the actual construction environment requirements, if there are multiple water inlet pipes and the elevation difference between the water inlet pipes is large, The water inlet sections can be respectively set to correspond to water inlet pipes of different elevations.

Further, between the energy dissipation section 1 and the water inlet section 2, between two adjacent water inlet sections 2, and/or between the water inlet section 2 and the well upper section 3, there is a device for adjusting the elevation of the water inlet hole 11 Regulating section 28. By setting the adjusting section 28 to adjust the elevation of the water inlet hole 11, the water inlet hole 11 can be matched with the elevation of the buried water inlet pipe to achieve a better assembly and connection effect.

Other structures of this embodiment are the same as those of Embodiment 1, and will not be repeated one by one.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (10)

1. A prefabricated water drop well suitable for urban drainage pipe networks, characterized in that: it includes a water drop well body that is assembled in sections, and the water drop well body includes an energy dissipation section (1) located at the bottom, located at the The water inlet section (2) above the energy dissipation section (1) and the well upper section (3) above the water inlet section (2); the energy dissipation section (1), water inlet section (2) and A well chamber is enclosed between the upper sections (3) of the well, and a partition (4) is arranged in the well chamber, and the partition (4) divides the well chamber into a water drop energy dissipation well chamber (5) and maintenance well chamber (6); The bottom of the energy dissipation section (1) is provided with a bottom plate (1a), and the energy dissipation section (1) is provided with a water outlet hole (9) located in the falling water energy dissipation well chamber (5). The lowest point of the water outlet hole (9) is located above the bottom plate (1a), and a drop water energy dissipation zone (10) is formed between the water outlet hole (9) and the bottom plate (1a); the water inlet At least one water inlet hole (11) located in the falling water energy dissipation well chamber (5) is provided on the side wall of the section (2); A socket assembly structure is adopted between two adjacent sections of the drop well body, and a socket is provided between the inner wall of the well chamber and the partition (4) for assembling the partition (4) in the well. Interior clapboard assembly structure. 2. The prefabricated drop well suitable for urban drainage pipe network according to claim 1, characterized in that: the water inlet section (2) is set to at least one section. 3. The prefabricated drop well suitable for urban drainage pipe network according to claim 2, characterized in that: between the energy dissipation section (1) and the water inlet section (2), two adjacent sections An adjustment section (28) for adjusting the elevation of the water inlet hole (11) is provided between the water inlet section (2) and/or between the water inlet section (2) and the well upper section (3) . 4. The prefabricated drop well suitable for urban drainage pipe network according to claim 1, characterized in that: the top of the well upper section (3) is provided with a top plate (3a); located in the maintenance well chamber (6 ) above the top plate (3a) is provided with a manhole (7), and the upper section of the shaft (3) is provided with a well collar (8) corresponding to the manhole (7). 5. The prefabricated drop well suitable for urban drainage pipe network according to claim 1, characterized in that: the partition plate (4) is provided with a well chamber (5) for communicating with the drop water energy dissipation well chamber (5) and the The maintenance manhole (12) of the maintenance well chamber (6), the lowest point of the maintenance manhole (12) is located above the lowest point of the water outlet hole (9). 6. The prefabricated drop well suitable for urban drainage pipe network according to claim 5, characterized in that: the maintenance well chamber (6) is provided with an interlayer plate (14), and the interlayer plate (14) ) is located below the maintenance manhole (12) or is flush with the lowest point of the maintenance manhole (12); an elevation difference is provided between the partition plate (14) and the bottom plate (1a), And a tool room (15) is formed between the partition board (14) and the base plate (1a), the partition board (14) is provided with a partition board hole (16) for operation and maintenance personnel to pass through A sealing cover (17) is installed on the interlayer plate hole (16); a cushion (18) for placing tools is arranged in the tool room (15). 7. The assembled drop well suitable for urban drainage pipe network according to any one of claims 1-6, characterized in that: the socket assembly structure includes a socket (19) and a socket (20) that cooperate with each other , a sealing ring (21) is provided between the socket (19) and the socket (20). 8. The prefabricated drop well suitable for urban drainage pipe network according to claim 7, characterized in that: among the two matching surfaces between two adjacent sections of the drop well body, one of the matching surfaces A groove is provided on the top to form the socket (19), and the other mating surface is provided with a protrusion that fits with the groove and forms the socket (20); and/or, Among the adjacent two sections of the falling well body, the outer wall of the end of the falling well body in one section is provided with a circumscribed stop wall (22), and the other section of the falling well body is provided with a The insertion section matched with the limit stop wall (22), and hemp asphalt (23) is arranged between the inner wall of the limit stop wall (22) and the outer wall of the insertion section. 9. The assembled drop well suitable for urban drainage pipe network according to claim 7, characterized in that: connecting seats (26) are respectively provided between adjacent two sections of the drop well body, and the connection A connecting hole is provided in the seat (26), and when the two sections of the falling well body are assembled in place, the connecting holes in the two corresponding connecting seats (26) are coaxial, and the two connecting holes are coaxial. A tie bolt is fixedly connected between the seats (26). 10. The prefabricated drop well suitable for urban drainage pipe network according to any one of claims 1-6, characterized in that: the baffle plate assembly structure is arranged in the well chamber and connected with the baffle plate ( 4) A matching assembly card slot (24), a sealing rubber (25) is provided between the assembly card slot (24) and the partition plate (4).