Construction equipment and methods for manholes

Abstract

This invention relates to a construction device and method for manholes, comprising the following steps: construction preparation; construction of the manhole bottom chute and foundation; brick-laying construction: rapid brick placement and sealing of the outer mold; assembly of the segmental modular outer mold; assembly of the telescopic inner support frame; assembly of the inner mold and mortar finishing device; hoisting the outer and inner molds into position; pouring the manhole body; proceeding to the next segment construction until the manhole body is completed. The beneficial effects of this invention are: by adjusting the extension length of the telescopic screw rod with a telescopic jack, the fixed position of the cyclically lifting inner support mold and the segmental modular outer mold is achieved, thereby increasing the rigidity of the cyclically lifting inner support mold and preventing mold bulging during manhole body pouring, effectively ensuring the construction quality of the manhole; by adjusting the jack to fix the adjusting screw rod and the lifting rapid mortar finishing device, the connection strength and coaxiality of the lifting rapid mortar finishing device and the cyclically lifting inner support mold are improved.

Description

Technical Field

[0001] This invention belongs to the field of civil engineering, and particularly relates to a construction device and method for manholes, which is applicable to the construction of manholes after excavation and the construction of brick arches, and can be used in urban drainage systems, sewage treatment plants and other fields. Background Technology

[0002] With the acceleration of urbanization and the continuous advancement of infrastructure construction, the laying and maintenance of various underground pipelines, such as drainage pipes, power lines, and communication lines, have become increasingly important. Inspection wells, as nodes in these pipeline systems, play a crucial role in inspection, repair, and maintenance, and are essential for the normal operation of cities.

[0003] Urban underground environments are complex and variable; factors such as groundwater levels, soil types, and geological structures all influence the construction and use of inspection wells. Different underground environments can lead to problems such as settlement and leakage in inspection wells, thus affecting their functionality and service life. Therefore, it is necessary to conduct technical research for different underground environments to find suitable construction methods and materials to ensure the stability and reliability of inspection wells.

[0004] In urban infrastructure construction, construction efficiency and quality are two key indicators. Traditional manhole construction methods may suffer from long construction periods and high labor intensity, affecting project progress and quality. Therefore, researching how to optimize manhole construction methods, improve construction efficiency, reduce costs, and simultaneously ensure construction quality has become an important direction for technological research.

[0005] Therefore, how to design and construct inspection wells to meet the growing infrastructure demands has become a pressing technical problem. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction device and method for manholes.

[0007] The construction method for this type of inspection well includes the following steps:

[0008] Step 1: Excavate the foundation pit and carry out the foundation construction. Pour the bottom chute above the foundation.

[0009] Step 2: Assemble the quick-laying brick-filling outer mold and connect the sewage inlet and outlet pipes; then place the bricks between the brick arch positioning strips and then use mortar to build the brick arch.

[0010] Step 3: Assemble the segmented, modular outer mold above the brick-making arch;

[0011] Step 4: Install the telescopic inner support frame on the lifting-type rapid mortar plastering device, and connect the circulating lifting inner support mold to the lifting-type rapid mortar plastering device through connecting screws. The telescopic inner support frame extends into the circulating lifting inner support mold and is fixed.

[0012] Step 5: Concrete pouring of the inspection well body is carried out between the segmental assembly type outer mold and the circulating lifting type inner mold.

[0013] Step Six: Use the suspended steel wire rope to lift the inner support mold in a circulating manner, which will drive the lifting-type rapid mortar finishing device to rise and scrape and smooth the manhole body.

[0014] Preferably, in step two, the rapid brick-laying and filling outer mold includes a brick-laying and filling semi-circular mold. The brick positioning strip is circumferentially set on the inner wall of the brick-laying and filling semi-circular mold. Both side walls of the brick-laying and filling semi-circular mold are provided with connecting plates. The connecting plates are provided with connecting plate screw holes. The two brick-laying and filling semi-circular molds are connected by connecting plates and fixed by screws and nuts. The two brick-laying and filling semi-circular molds are respectively provided with a water inlet pipe reserved hole or a water outlet pipe reserved hole in the center of their side. The water inlet pipe reserved hole is connected to the sewage inlet pipe, and the water outlet pipe reserved hole is connected to the sewage outlet pipe.

[0015] Preferably, in step three, the segmental assembly type outer mold includes a semi-circular outer mold, an ear plate, and a splicing connector. The two semi-circular outer molds are spliced ​​together by the splicing connector. The top of the semi-circular outer mold is provided with a lifting ring for the outer mold. The center of the side of the splicing connector is provided with an ear plate. The top of the ear plate is provided with a pin hole. The two semi-circular outer molds are fixed to form a segmental assembly type outer mold by inserting U-shaped pins into the pin holes on both sides.

[0016] Preferably, in step four, the circulating lifting inner support mold adopts an integral design. The top of the inner mold is equipped with a lifting ring, the inner wall of the inner mold has a reserved hole, and the bottom of the inner mold has a bottom screw hole. The lifting rapid mortar finishing device includes a side wall scraper plate, the top of the side wall scraper plate has a top screw hole, the inner wall of the side wall scraper plate has a reserved hole, and the bottom of the side wall scraper plate has a slurry and residue collection trough. The top center of the slurry and residue collection trough is equipped with a fixing sleeve, and the center of the fixing sleeve has a reserved hole.

[0017] Preferably, in step four, the telescopic inner support frame includes a column and an adjusting jack. The column of the telescopic inner support frame is provided with a telescopic screw rod and an adjusting screw rod on its side, which are arranged radially. The top of the column of the telescopic inner support frame is provided with a lifting ring. The column of the telescopic inner support frame is provided with a telescopic jack and an adjusting jack on its side, which are arranged circumferentially. The telescopic jack is connected to the telescopic screw rod, and the adjusting jack is connected to the adjusting screw rod.

[0018] Preferably, in step four, the column of the telescopic inner support frame is installed in the reserved hole of the fixed sleeve and fixed with bolts; the telescopic screw rod is inserted into the reserved hole in the inner wall of the inner mold; the adjusting screw rod is inserted into the reserved hole in the inner wall of the scraper plate; the two ends of the connecting screw are respectively installed in the top screw hole and the bottom screw hole, so as to fix the circulating lifting inner support type inner mold and the lifting type rapid mortar plastering device.

[0019] As a preferred option, step five specifically involves first hoisting the reinforcing cage of the manhole body into place, then using a crane and suspension wire rope to hoist the telescopic inner support frame, the segmental assembly outer mold, and the circulating lifting inner support inner mold to the location where concrete needs to be poured; finally, concrete is poured into the manhole body between the segmental assembly outer mold and the circulating lifting inner support inner mold.

[0020] As a preferred option, in step six, the segmental assembly-type outer mold of the next section of the manhole is constructed first, and then the inner support-type inner mold is lifted by a suspension steel wire rope, thereby driving the lifting-type rapid mortar finishing device to rise. The inner wall of the manhole body poured in step five is scraped and smoothed; then the concrete pouring of the next section of the manhole body is carried out; step six is ​​repeated until the manhole body is poured.

[0021] Inspection wells and their construction equipment are obtained by any of the methods described above.

[0022] The beneficial effects of this invention are:

[0023] 1) The circulating lifting internal support type inner mold of the present invention has an ingenious structural design and is fixedly connected to the lifting rapid mortar plastering device through the telescopic internal support frame. When it is lifted upward for the pouring of the next section of the inspection well body, it can simultaneously drive the lower lifting rapid mortar plastering device to work, which greatly improves the construction efficiency.

[0024] 2) The segmental assembly type external mold used in this invention is assembled from two semi-circular external mold pieces, which can achieve quick assembly and disassembly, and is also convenient for transportation and hoisting, greatly improving construction efficiency.

[0025] 3) The lifting-type rapid mortar finishing device involved in this invention is ingeniously designed and can quickly smooth the well body. At the same time, there is a gap between the lifting-type rapid mortar finishing device and the circulating lifting internal support mold, which can collect excess mortar and residue, improve construction efficiency, and ensure construction safety.

[0026] 4) The quick brick-laying and sealing outer mold of the present invention is ingeniously designed. By setting brick arch positioning strips in the inner wall, the positioning of the brick arch can be quickly realized, which greatly improves the construction efficiency of brick laying, while ensuring the sealing of the connection with the pipeline.

[0027] 5) The telescopic inner support frame in this invention is reasonably designed. On the one hand, the extension length of the telescopic screw rod can be adjusted by telescopic jacks to fix the cyclic lifting inner support mold and the segmented assembly outer mold, thereby increasing the rigidity of the cyclic lifting inner support mold and preventing the formwork from bulging during well pouring, effectively ensuring the construction quality of the inspection well. On the other hand, by adjusting the jacks, the adjusting screw rod and the lifting rapid mortar finishing device are fixedly connected, improving the connection strength and coaxiality between the lifting rapid mortar finishing device and the cyclic lifting inner support mold. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the manhole structure construction;

[0029] Figure 2 This is a three-dimensional schematic diagram of the segmental assembly type external mold;

[0030] Figure 3 This is a three-dimensional schematic diagram of a segmental assembly type external mold structure;

[0031] Figure 4 This is a schematic diagram of the assembly plan of the segmental assembly type external mold;

[0032] Figure 5 This is a three-dimensional schematic diagram of a U-shaped plug pin;

[0033] Figure 6 This is a 3D schematic diagram of the connection between the rapid brick-laying and filling outer mold and the pipeline;

[0034] Figure 7 This is a three-dimensional schematic diagram of the outer mold structure for rapid brick placement and sealing;

[0035] Figure 8 This is a three-dimensional schematic diagram of a pull-up rapid mortar plastering device;

[0036] Figure 9 This is a three-dimensional schematic diagram of the cyclic lifting internal support type inner mold assembly;

[0037] Figure 10This is a three-dimensional schematic diagram showing the connection between the circulating lifting internal support mold and the lifting rapid mortar plastering device.

[0038] Figure 11 This is a three-dimensional schematic diagram of the internal structure of the circulating lifting internal support type inner mold;

[0039] Figure 12 This is a three-dimensional schematic diagram of the bottom of the circulating lifting internal support type inner mold;

[0040] Figure 13 This is a three-dimensional schematic diagram of the top of the circulating lifting internal support type inner mold;

[0041] Figure 14 This is a three-dimensional schematic diagram showing the connection between the telescopic inner support frame and the lifting-type rapid mortar plastering device.

[0042] In the diagram: 1-Well bottom chute, 2-Base, 3-Sewage inlet pipe, 4-Brick issuing arch, 5-Lifting rapid mortar plastering device, 6-Side wall scraper plate, 7-Top screw hole, 8-Connecting screw, 9-Bottom screw hole, 10-Side wall of inner mold, 11-Pin hole, 12-U-shaped insert pin, 13-Telescopic jack, 14-Telescopic screw rod, 15-Inspection well body, 16-Top of inner mold, 17-Suspension wire rope, 18-Lifting ring of telescopic inner support frame, 19-Lifting ring of inner mold, 20-Semi-circular outer mold, 21-Circulating lifting inner support type inner mold, 22-Ear plate, 23-Splicing connector. 24-Column of telescopic inner support frame; 25-Adjusting jack; 26-Adjusting screw rod; 27-Pre-reserved hole in inner wall of scraper plate; 28-Collection tank for excess slurry and residue; 29-Segmental assembly type outer mold; 30-Fixing sleeve; 31-Drainage pipe; 32-Quick brick laying and sealing outer mold; 33-Pre-reserved hole for water inlet pipe; 34-Semi-circular mold for brick laying and sealing; 35-Screw rod; 36-Nut; 37-Connecting plate; 38-Pre-reserved hole for water outlet pipe; 39-Brick arch positioning strip; 40-Screw hole of connecting plate; 41-Pre-reserved hole of fixing sleeve; 42-Pre-reserved hole in inner wall of inner mold; 43-Lifting ring of outer mold; 44-Bolt. Detailed Implementation

[0043] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0044] Example 1

[0045] As one example, such as Figures 1 to 14As shown, the construction equipment for the inspection well includes: 1. Bottom chute; 2. Base; 3. Inlet sewage pipe; 4. Brick-feeding arch; 5. Pull-up rapid mortar plastering device; 6. Side wall scraper; 7. Top screw hole; 8. Connecting screw; 9. Bottom screw hole; 10. Side wall of inner mold; 11. Pin hole; 12. U-shaped insert pin; 13. Telescopic jack; 14. Telescopic screw rod; 15. Inspection well body; 16. Top of inner mold; 17. Suspension wire rope; 18. Lifting ring of telescopic inner support frame; 19. Lifting ring of inner mold; 20. Semi-circular outer mold; 21. Circulating lifting inner support type inner mold; 22. Ear plate; 3. Splicing. 23. Connector; 24. Column of telescopic inner support frame; 25. Adjusting jack; 26. Adjusting screw rod; 27. Reserved hole in inner wall of scraper plate; 28. Collection tank for residual slurry and residue; 29. ​​Segmental assembly type outer mold; 30. Fixing sleeve; 31. Drainage pipe; 32. Quick brick laying and filling outer mold; 33. Reserved hole in water inlet pipe; 34. Semi-circular mold for brick laying and filling; 35. Screw; 36. Nut; 37. Connecting plate; 38. Reserved hole in water outlet pipe; 39. Brick arch positioning strip; 40. Screw hole in connecting plate; 41. Reserved hole in inner wall of inner mold; 42. Lifting ring of outer mold; 43. Bolt; 44.

[0046] The manhole body 15 is poured using a circulating lifting internal support mold 21 and a segmental assembly external mold 29; the manhole body 15 is leveled and smoothed using a lifting rapid mortar finishing device 5; the brick-laying arch 4 and the connection between the brick-laying arch 4 and the sewage inlet pipe 3 and the reserved hole 33 of the water inlet pipe are constructed using a rapid brick-laying and sealing external mold 32.

[0047] like Figures 2 to 5 As shown, the segmental assembly type outer mold 29 is composed of two semi-circular outer molds 20 spliced ​​together and fixed with U-shaped plug-in pins 12;

[0048] The segmental assembly type outer mold 29 is mainly composed of a semi-circular outer mold 20, an ear plate 22, and a splicing connector 23. The splicing connector 23 is evenly distributed on the outer wall of the splicing part of the semi-circular outer mold 20. The top of the semi-circular outer mold 20 is provided with a lifting ring 43 for the outer mold. The ear plate 22 is provided in the center of the side of the splicing connector 23. The top of the ear plate 22 is provided with a pin hole 11. The U-shaped plug-in pins 12 are securely connected to the pin holes 11 on both sides.

[0049] The circulating lifting inner support type inner mold 21 and the lifting type rapid mortar plastering device 5 are connected by a telescopic inner support frame and connecting screws 8.

[0050] The circulating lifting inner support type inner mold 21 adopts an integral design. The top 16 of the inner mold is evenly provided with the inner mold lifting rings 19. The inner mold side wall 10 is evenly provided with the inner mold inner wall reserved holes 42. The bottom of the inner mold side wall 10 is evenly provided with the bottom screw holes 9.

[0051] like Figure 8 As shown, the pull-up rapid mortar finishing device 5 mainly consists of a side wall scraper plate 6 and a residual mortar and residue collection tank 28. The top of the side wall scraper plate 6 is evenly provided with top screw holes 7, and the inner wall of the side wall scraper plate 6 is evenly provided with scraper plate inner wall reserved holes 27. The bottom of the side wall scraper plate 6 is provided with a residual mortar and residue collection tank 28. The top center of the residual mortar and residue collection tank 28 is provided with a fixing sleeve 30, and the top of the fixing sleeve 30 is provided with a fixing sleeve reserved hole 41.

[0052] like Figure 14 As shown, the telescopic inner support frame mainly consists of a telescopic jack 13, a telescopic screw rod 14, a column 24 of the telescopic inner support frame, an adjusting jack 25, and an adjusting screw rod 26. The column 24 of the telescopic inner support frame has radially arranged telescopic screw rods 14 and adjusting screw rods 26 on its side, and a lifting ring 18 of the telescopic inner support frame is provided at the top of the column 24. The column 24 of the telescopic inner support frame has evenly arranged telescopic jacks 13 and adjusting jacks 25 in a circumferential distribution on its side, and the telescopic jacks 13 and adjusting jacks 25 are connected to the telescopic screw rods 14 and adjusting screw rods 26.

[0053] like Figures 9 to 13 As shown, the column 24 of the telescopic inner support frame is installed in the reserved hole 41 of the fixed sleeve and fixed with bolts 44. The telescopic screw rod 14 is inserted into the reserved hole 42 in the inner wall of the inner mold. The adjusting screw rod 26 is inserted into the reserved hole 27 in the inner wall of the scraper plate. The two ends of the connecting screw 8 are respectively installed in the top screw hole 7 and the bottom screw hole 9.

[0054] like Figure 6 and Figure 7 As shown, the rapid brick-laying and filling outer mold 32 is composed of two brick-laying and filling semi-circular molds 34 spliced ​​together and secured with screws 35 and nuts 36.

[0055] The rapid brick-laying and filling outer mold 32 mainly consists of a brick-laying and filling semi-circular mold 34, a connecting plate 37, and a brick arch positioning strip 39. The brick arch positioning strip 39 is evenly arranged circumferentially on the inner wall of the brick-laying and filling semi-circular mold 34. The brick-laying and filling semi-circular mold 34 has a water inlet pipe reserved hole 33 or a water outlet pipe reserved hole 38 in the center of its side. The side wall of the brick-laying and filling semi-circular mold 34 has a connecting plate 37 at the splicing point. The side wall of the connecting plate 37 has a connecting plate screw hole 40. The screw 35 passes through the connecting plate screw holes 40 on both sides and is fixed with a nut 36.

[0056] The reserved hole 33 of the water inlet pipe is connected to the sewage inlet pipe 3, and the reserved hole 38 of the water outlet pipe is connected to the sewage outlet pipe 31.

[0057] Example 2

[0058] As another embodiment, this embodiment two proposes a method for constructing inspection wells using the construction device for inspection wells proposed in embodiment one, including the following steps:

[0059] Step 1, Construction Preparation: Before pouring the manhole body 15, the foundation pit is excavated and components such as the segmental assembly external mold 29 are fabricated.

[0060] Construction of bottom chute 1 and foundation 2: After the foundation pit is excavated, the foundation 2 cushion layer is constructed, and then the bottom chute 1 is poured on top of the foundation 2;

[0061] Step 2, Construction of Brick-laying Curtain 4: Assemble two semi-circular brick-laying and sealing molds 34 at the joint plate 37 to form a whole quick brick-laying and sealing outer mold 32. At the same time, connect the water inlet pipe reserved hole 33 to the sewage inlet pipe 3, and connect the water outlet pipe reserved hole 38 to the sewage outlet pipe 31. Then, place the bricks between the brick-laying positioning strips 39, and then use mortar to build the brick-laying curtain 4.

[0062] Step 3: Assemble the segmental assembly type outer mold 29: Above the brick-making arch 4, assemble the two semi-circular outer molds 20 into a whole segmental assembly type outer mold 29 at the splicing connector 23, and fix it with U-shaped plug-in pins 12;

[0063] Step 5: Assemble the telescopic inner support frame: Install the column 24 of the telescopic inner support frame into the reserved hole 41 of the fixed sleeve and fix it with bolts 44. At the same time, adjust the adjusting jack 25 so that the adjusting screw rod 26 is installed in the reserved hole 27 on the inner wall of the scraper plate.

[0064] Assembly of inner mold and mortar finishing device: Install the two ends of the connecting screw 8 into the top screw hole 7 and the bottom screw hole 9 respectively, so as to realize the connection between the cyclic lifting inner support type inner mold 21 and the lifting type quick mortar finishing device 5. At the same time, adjust the telescopic jack 13 so that the telescopic screw rod 14 is installed in the reserved hole 42 on the inner wall of the inner mold.

[0065] Hoist the outer and inner molds into place: First, hoist the steel cage of the manhole body 15 into place, then connect the suspension wire rope 17 to the lifting ring 18 of the telescopic inner support frame, the lifting ring 19 of the inner mold and the lifting ring 43 of the outer mold respectively, and then use the crane to hoist the circulating lifting inner support type inner mold 21 and the telescopic inner support frame to the position where pouring is required.

[0066] Step 5: Concrete pouring of manhole body 15: Concrete pouring of manhole body 15 is carried out between segmental assembly type outer mold 29 and circulating lifting type inner mold 21.

[0067] Step 6: Proceed to the next segment of construction until the well body is poured: Use the suspended steel wire rope 17 to lift the circulating inner support mold 21, thereby driving the lifting rapid mortar finishing device 5 to rise, thus achieving the scraping and smoothing of the manhole body 15; then repeat the above operation until the manhole body 15 is poured.

[0068] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0069] Example 3

[0070] As another embodiment, the manhole obtained by the construction of the manhole proposed in Embodiment 2, the manhole obtained by the construction device of this manhole, the bottom chute 1 is set on the top of the base 2, the bottom chute 1 and the brick vault 4 are provided with a sewage inlet pipe 3 and a sewage outlet pipe 31, and the manhole body 15 is poured on top of the brick vault 4.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A method for constructing a manhole, characterized in that, Includes the following steps: Step 1: Excavate the foundation pit and carry out the foundation (2) construction. Pour the bottom chute (1) above the foundation (2). Step 2: Assemble the quick-laying brick-filling outer mold (32), and connect the sewage inlet pipe (3) and the sewage outlet pipe (31); then place the bricks between the brick arch positioning strips (39), and then build the brick arch (4) with mortar. The quick-laying brick-filling outer mold (32) includes a brick-filling semi-circular mold (34). The brick arch positioning strips (39) are circumferentially set on the inner wall of the brick-filling semi-circular mold (34). Both sides of the brick-filling semi-circular mold (34) are provided with connecting plates (37). The docking plate (37) is provided with docking plate screw holes (40). Two brick-filling semi-circular molds (34) are connected by the docking plate (37) and fixed by screws (35) and nuts (36). The two brick-filling semi-circular molds (34) are respectively provided with water inlet pipe reserved holes (33) or water outlet pipe reserved holes (38) in the center of their sides. The water inlet pipe reserved holes (33) are connected to the sewage inlet pipe (3), and the water outlet pipe reserved holes (38) are connected to the sewage outlet pipe (31). Step 3: Assemble the segmented assembly outer mold (29) above the brick roll (4); Step 4: Install the telescopic inner support frame on the lifting-type rapid mortar plastering device (5). Connect the circulating lifting inner support type inner mold (21) and the lifting-type rapid mortar plastering device (5) through the connecting screws (8). The telescopic inner support frame extends into the circulating lifting inner support type inner mold (21) and is fixed. The circulating lifting inner support type inner mold (21) adopts an integral design. The top (16) of the inner mold is provided with the inner mold lifting ring (19). The side wall (10) of the inner mold is provided with the inner mold inner wall reserved hole (42). The bottom of the side wall (10) of the mold is provided with a bottom screw hole (9); the lifting type rapid mortar plastering device (5) includes a side wall scraper plate (6), the top of the side wall scraper plate (6) is provided with a top screw hole (7), the inner wall of the side wall scraper plate (6) is provided with a scraper plate inner wall reserved hole (27), and the bottom of the side wall scraper plate (6) is provided with a residual slurry and residue collection trough (28); a fixing sleeve (30) is provided at the center of the top of the residual slurry and residue collection trough (28), and a fixing sleeve reserved hole (41) is provided at the center of the fixing sleeve (30); The telescopic inner support frame includes a column (24) and an adjusting jack (25). The column (24) of the telescopic inner support frame is provided with a telescopic screw rod (14) and an adjusting screw rod (26) on its side. The telescopic screw rod (14) and the adjusting screw rod (26) are arranged radially. The top of the column (24) of the telescopic inner support frame is provided with a lifting ring (18). The column (24) of the telescopic inner support frame is provided with a telescopic jack (13) and an adjusting jack (25) on its side. The telescopic jack (13) and the adjusting jack (25) are arranged in a ring. The telescopic jack (13) is connected to the telescopic screw rod (14), and the adjusting jack (25) is connected to the adjusting screw rod (26). Step 5: Concrete pouring of the manhole body (15) between the segmental assembly outer mold (29) and the circulating lifting inner support mold (21); Step 6: Use the suspended steel wire rope (17) to lift the circulating lifting inner support mold (21), thereby driving the lifting rapid mortar finishing device (5) to rise and scrape and smooth the manhole body (15). First, construct the segmental assembly outer mold (29) of the next manhole segment, and then use the suspended steel wire rope (17) to lift the circulating lifting inner support mold (21), thereby driving the lifting rapid mortar finishing device (5) to rise. Scrape and smooth the inner wall of the manhole body (15) poured in Step 5. Then, pour the concrete of the next manhole body (15). Repeat Step 6 until the manhole body (15) is poured.

2. The construction method for the inspection well according to claim 1, characterized in that, In step three, the segmental assembly type outer mold (29) includes a semi-circular outer mold (20), an ear plate (22), and a splicing connector (23). The two semi-circular outer molds (20) are spliced ​​together by the splicing connector (23). The top of the semi-circular outer mold (20) is provided with a lifting ring (43) for the outer mold. The center of the side of the splicing connector (23) is provided with an ear plate (22). The top of the ear plate (22) is provided with a pin hole (11). The two semi-circular outer molds (20) are fixed to form the segmental assembly type outer mold (29) by inserting U-shaped plug pins (12) into the pin holes (11) on both sides.

3. The construction method for the inspection well according to claim 1, characterized in that, In step four, the column (24) of the telescopic inner support frame is installed in the reserved hole (41) of the fixed sleeve and fixed with bolts (44). The telescopic screw rod (14) is inserted into the reserved hole (42) of the inner wall of the inner mold. The adjusting screw rod (26) is inserted into the reserved hole (27) of the inner wall of the scraper plate. The two ends of the connecting screw (8) are respectively installed in the top screw hole (7) and the bottom screw hole (9) to fix the circulating lifting inner support type inner mold (21) and the lifting type rapid mortar plastering device (5).

4. The construction method for the inspection well according to claim 1, characterized in that, Step 5 is as follows: First, the steel cage of the manhole body (15) is hoisted into place. The crane and the suspension wire rope (17) hoist the telescopic inner support frame, the segmental assembly outer mold (29) and the circulating lifting inner support inner mold (21) to the position where the concrete needs to be poured. Finally, the concrete of the manhole body (15) is poured between the segmental assembly outer mold (29) and the circulating lifting inner support inner mold (21).

5. A construction device for a manhole, characterized in that, Applied to the method described in any one of claims 1 to 4.

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