Prefabrication device and construction method for super-large diameter reinforced concrete jacking pipe joints

Abstract

The present invention relates to a prefabrication device and construction method for a super-large diameter reinforced concrete jacking pipe segment, including steps: assembling and hoisting the bottom formwork; installing a temporary adjustment and stabilization device for the base steel collar; installing the steel collar and the grout-stop rubber strip; placing the steel reinforcement cage and welding the anchor bars; installing the middle formwork; assembling and hoisting the inner formwork; installing the upper formwork; pouring and curing the concrete jacking pipe segment; and demolding. The beneficial effects of the present invention are as follows: By adopting a high-precision segmented mold, breaking through the traditional mold design concept, the pipe body adopts a two-half mold structure, and the circular two-half mold is convenient for disassembly. Combining the integral mold with the two-half mold, with complementary advantages, the integral mold is disassembled and assembled separately, ensuring the quality of the pipe segment, solving the problem of difficult transportation of large-diameter pipe segments, being convenient for assembly, improving the installation efficiency, having a short construction period, and having broad application prospects.

Description

Technical Field

[0001] The present invention relates to a prefabrication device and construction method for super-large diameter reinforced concrete pipe jacking pipe segments, belonging to the field of civil engineering and applicable to the prefabrication construction of reinforced concrete pipe jacking pipe segments. Background Art

[0002] For pipe jacking engineering projects in road municipal engineering, the construction sites are generally in bustling urban areas, resulting in narrow construction operation surfaces. Usually, the construction operation surface in bustling areas only includes the working well and the space for hoisting pipe jacking pipe segments. Therefore, to fabricate concrete pipe jacking pipe segments, it is generally selected to be prefabricated in a place relatively far from the working well. The quality of concrete pipe segments is directly related to the success or failure of the pipe jacking project. To ensure the smooth progress of the pipe jacking project, strict quality control must be carried out in the prefabrication of pipe segments.

[0003] Traditional prefabrication of concrete pipe segments uses simple internal and external supports and combined small steel molds or wooden molds, and the method of manually pouring concrete. This process requires a large number of workers. Due to the small diameter of the prefabricated pipe segments and the small working surface, the work efficiency is low. Therefore, the construction time of the formwork and supports for each prefabricated pipe is long, and the degree of mechanized construction is not high. Moreover, the concrete at the formwork joints is not full and the appearance quality of the concrete is poor. For super-large cross-section pipe segments, due to their large cross-sectional dimensions, large outer contour dimensions, and the weight of each segment exceeding one hundred tons, the prefabrication molds for pipe segments need to have strong structures, large sizes, and heavy weights. The traditional circular molds are difficult to disassemble and install, and even cannot be disassembled and installed. The traditional process requires a large number of workers. Due to the small diameter of the prefabricated pipe segments and the small working surface, the work efficiency is low. Therefore, the construction time of the formwork and supports for each prefabricated pipe is long, and the degree of mechanized construction is not high. Moreover, the concrete at the formwork joints is not full and the appearance quality of the concrete is poor. When the traditional flipping spreader flips the pipe materials, the flipping speed is too fast. Due to the large self-weight of the pipe materials, the inertia generates additional impulse, reducing the safety performance of the spreader and easily causing accidents, resulting in local cracks, missing corners, and edge chipping of the pipes. The concrete volume of super-large diameter pipes is large and the number of feeding times is many. The traditional general's hat batching is uneven, which not only increases the vibration workload but also brings problems of uneven concrete density. In the process of pipe jacking pipe segment assembly and pipe jacking construction, ensuring the prefabrication quality of super-large diameter reinforced concrete pipe jacking pipe segments becomes a problem and challenge faced by the project.

[0004] In view of this, there is an urgent need to propose a prefabrication device and construction method for super-large diameter reinforced concrete pipe jacking pipe segments. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a prefabrication device and construction method for super-large diameter reinforced concrete pipe jacking pipe segments.

[0006] This prefabrication device for large-caliber reinforced concrete pipe jacking pipe joints includes: a bottom formwork, a middle semi-circular mold, a top mold, an inner mold, and a temporary adjustment and stabilization device for the base steel collar;

[0007] The bottom formwork is located below the middle semi-circular mold, and the top mold is located above the middle semi-circular mold. Two middle semi-circular molds are spliced into a whole through splicing vertical plates; the inner mold is located inside the inner cavity of the middle semi-circular mold; longitudinal connecting rods with telescopic sleeves are provided on the inner wall of the inner mold;

[0008] The bottom formwork is provided with multiple stepped layers from top to bottom, which are the bottom socket layer and the bottom spigot layer in sequence. Multiple ear plates are provided below the top of the bottom formwork, and hooks and U-shaped fasteners are provided on the ear plates; the bottom of the bottom formwork is connected to the support base through a connecting rod, and multiple bottom formwork lifting ear plates are provided on the side of the support base;

[0009] Multiple top mold splicing parts are provided below the top mold, docking holes are provided on the side of the top mold splicing parts, and the top mold also adopts a multi-step layer design;

[0010] The temporary adjustment and stabilization device for the base steel collar includes an adjustment rod, a base, a vertical column, and a jack. The base is located inside the bottom formwork, a vertical column is provided in the center of the top of the base, jacks are provided along the circumference of the vertical column, and the jacks are supported on the inner wall of the steel collar through the adjustment rod.

[0011] Preferably: a reserved groove is provided on the outer side wall of the middle semi-circular mold, multiple vertical connecting plates are provided in the reserved groove between the top plate of the semi-circular mold and the bottom plate of the semi-circular mold, and multiple horizontal connecting plates are evenly provided between the vertical connecting plates; top wedges and bottom wedges are respectively provided at the top and bottom of the vertical connecting plates, and the top wedges and bottom wedges are respectively welded to the top plate of the semi-circular mold and the bottom plate of the semi-circular mold.

[0012] Preferably: the top and bottom of the middle semi-circular mold are respectively provided with a top plate of the semi-circular mold and a bottom plate of the semi-circular mold. Multiple fixing parts are provided below the top plate of the semi-circular mold, and multiple bottom splicing parts are provided above the bottom plate of the semi-circular mold; multiple fixing plates and rotating fasteners are provided on the splicing vertical plate, and clamping grooves are provided on the fixing plates and the side of the splicing vertical plate; a middle mold lifting ear plate is provided at the top of the middle semi-circular mold, a lifting ear plate lifting hole is provided on the side of the middle mold lifting ear plate, and multiple docking reserved holes are provided on the top of the bottom plate of the semi-circular mold; the fixing part is provided with a rotating shaft, and a docking hook is provided on the rotating shaft; a bottom splicing part reserved hole is provided on the side of the bottom splicing part; the fixing plates are provided on both sides of the splicing vertical plate, and the rotating fastener is welded to one end of the fixing plate.

[0013] Preferably: a reserved groove is provided on the side of the bottom template, and a plurality of vertical connecting plates are provided in the reserved groove; a steel collar is arranged along the side wall of the bottom template at the top of the bottom socket layer, and screw holes are provided at the edge of the bottom template; a middle reserved hole of the bottom die is provided between the bottom socket layer and the bottom socket layer, and a bottom reserved hole of the bottom die is provided below the bottom socket layer; the ear plate is connected to the U-shaped fastener through a plug-in pin, and is fixed with a nut and a screw, and a pin reserved hole is provided at the end of the plug-in pin; a perforation is provided in the center of the U-shaped fastener, and the hook connecting rod passes through the perforation and is connected to the fixed seat, the fixed seat is fixed in the center of the plug-in pin, and a hook is provided below the hook connecting rod.

[0014] Preferably: one telescopic sleeve is symmetrically provided on the upper and lower sides of the outer side wall of the longitudinal connecting rod; a transverse connecting rod, a lower telescopic rod and a top telescopic rod are further provided on the inner wall of the inner mold, and a telescopic jack is provided on the inner side wall of the longitudinal connecting rod; the longitudinal connecting rods are connected by a fixing block, a transverse connecting rod is provided on the outer side surface of the fixing block, a hoop is provided on the inner side surface of the fixing block, and a rotating rod is provided in the hoop; a hoop hole is provided on the hoop, a rotating rod hole is provided on the rotating rod, and the tops of the two ends of the rotating rod are connected by a lifting handle; a jack connecting rod is provided on the side of the telescopic jack, and the jack connecting rods are stabilized by a fixing sleeve; the telescopic sleeves are respectively connected to the lower telescopic rod and the top telescopic rod, and a lifting ring is provided at the top of the top telescopic rod; a longitudinal connecting rod lifting member is provided at the top of the longitudinal connecting rod, and a lifting member is provided at the top of the transverse connecting rod.

[0015] Preferably: the inner wall of the inner mold is provided with a transverse connecting strip and a vertical connecting strip, and the transverse connecting rod, the top telescopic rod and the longitudinal connecting rod are respectively clamped between the transverse connecting strip and the vertical connecting strip.

[0016] The construction method of this prefabrication device for super-large diameter reinforced concrete jacking pipe joints includes the following steps:

[0017] Step 1: After installing the U-shaped fastener, hoist and place the bottom template through the bottom die lifting ear plate; place the base in the hole at the center of the bottom template;

[0018] Step 2: Hoist the steel collar above the bottom socket layer, and adjust the jack so that the adjusting rod presses against the steel collar to fit with the bottom template;

[0019] Step 3: Remove the temporary adjustment and stabilization device of the base steel collar, place the bound steel cage on the socket layer, and at the same time weld the anchoring bars on the steel collar, and weld the anchoring bars to the bottom of the steel cage;

[0020] Step 4: First splice the two middle semi-circular molds at the splicing vertical plate; then assemble the inner mold and hoist it into the inner cavity of the middle semi-circular mold;

[0021] Step 5: Align the top mold with the top of the semicircular mold top plate, dock the fixing piece with the top mold splicing piece, and connect the docking hook with the docking hole;

[0022] Step 6: Set up a concrete pouring hopper between the inner mold and the top of the top mold, pour the pipe section between the middle semicircular mold and the inner mold, and steam-cure the pipe section at the same time;

[0023] Step 7: Remove the top mold first, then the inner mold, then the middle semicircular mold, and finally the bottom mold.

[0024] Preferably, in step four: rotate and adjust the rotating clamping piece so that the rotating clamping piece is clamped in the clamping groove, and then fix it with a screw passing through the clamping hole; connect the middle mold lifting ear plate with a wire rope, and then use a crane to align the middle semicircular mold with the bottom template for splicing, the semicircular mold bottom plate is placed on the top of the bottom template, the bottom splicing piece is aligned with the hook, and then the hook is connected to the reserved hole of the bottom splicing piece, and at the same time, the screw hole is aligned with the docking reserved hole, and fixed with a screw.

[0025] Preferably, in step four: the steps of assembling and lifting the inner mold are as follows: passing the U-shaped clamp through the hoop hole and the rotating rod hole to fix the hoop and the rotating rod, and fixing the jack connecting rods on both sides with a fixed sleeve; installing the transverse connecting rod, the top telescopic rod and the longitudinal connecting rod on the inner wall of the inner mold respectively; connecting the lifting ring, the lifting part and the longitudinal connecting rod lifting part respectively with steel wire ropes, and then placing the inner mold with a crane in the internal cavity of the middle semicircular mold.

[0026] Preferably, in step seven: first release the connection between the fixing piece and the top mold splicing piece, and remove the top mold; then loosen the fixing sleeve, pull the rotating rod upward with a wire rope, and the rotating rod rotates vertically along the hoop, while driving the transverse connecting rod to shrink inward, adjust the telescopic jack so that the transverse connecting rod, the top telescopic rod and the longitudinal connecting rod are linked to cause the inner mold to change its diameter inward, and demold the inner mold; adjust the rotating clamping piece and release the screw at the clamping hole, remove the middle semicircular mold, then release the connection between the bottom splicing piece and the hook, and then remove the bottom template.

[0027] The beneficial effects of the present invention are:

[0028] 1) The present invention adopts a high-precision segmented mold, breaks through the traditional mold design concept, solves the problem of difficult transportation of large-diameter pipe sections, is easy to assemble, improves installation efficiency, shortens the construction period, and has broad application prospects.

[0029] 2) The outer mold of the jacking pipe body in the present invention adopts a two-half mold structure, and the middle semicircular mold is easy to disassemble. The overall mold is combined with the two half molds, and the advantages are complementary. The overall mold can be disassembled and assembled separately, which ensures the casting quality of the pipe section.

[0030] 3) In the present invention, the internal mold of the jacking pipe segment adopts a variable-diameter round steel mold, which improves the efficiency of formwork installation and removal. Under the action of the telescopic rod, the internal mold will automatically contract inward so as to be lifted out of the cast pipe segment without contacting the concrete, causing no damage to the concrete pipe segment and improving economic benefits.

[0031] 4) Compared with the construction technology of traditional precast formwork, the present invention has successfully overcome the problems in mold design, production technology and technical control, etc., and developed a new high-precision production technology and new equipment for reinforced concrete jacking pipes, accumulating valuable experience for the future research and development of similar prefabrication construction technologies for extra-large diameter reinforced concrete jacking pipe segments, and will have a significant impact on the future development of the concrete pipe manufacturing field. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the three-dimensional assembly drawing of the semi-circular middle mold;

[0033] Figure 2 is the axonometric drawing of the semi-circular middle mold;

[0034] Figure 3 is the elevation view of the assembly of the entire pipe segment formwork;

[0035] Figure 4 is the sectional view of the entire pipe segment formwork;

[0036] Figure 5 is the left view of the assembly of the semi-circular middle mold;

[0037] Figure 6 is the plan view of the assembly of the semi-circular middle mold;

[0038] Figure 7 is the three-dimensional drawing of the precise installation of the steel sleeve ring;

[0039] Figure 8 is the plan view of the precise installation of the steel sleeve ring;

[0040] Figure 9 is the three-dimensional drawing of the bottom formwork of the socket and spigot;

[0041] Figure 10 is the axonometric drawing of the bottom formwork of the socket and spigot;

[0042] Figure 11 is the top view of the bottom formwork;

[0043] Figure 12 is the detailed structure drawing of the assembled parts of the bottom formwork;

[0044] Figure 13 is the structure drawing of the assembled parts of the bottom formwork;

[0045] Figure 14 is the top view of the entire pipe segment formwork;

[0046] Figure 15 is the sectional view of the bottom formwork;

[0047] Figure 16 It is an elevation view of the bottom die assembly.

[0048] Figure 17 It is a detailed structure diagram of the inner die.

[0049] In the figure: 1 - horizontal connecting bar, 2 - bottom socket layer, 3 - reserved pin holes, 4 - nuts, 5 - fixing seats, 6 - perforations, 7 - hook connecting rod, 8 - hooks, 9 - U-shaped fasteners, 10 - screws, 11 - plug-in pins, 12 - ear plates, 13 - bottom formwork, 14 - steel collar, 15 - bottom socket layer, 16 - screw holes, 17 - lifting ear plate of the bottom die, 18 - connecting rod, 19 - reserved hole in the middle of the bottom die, 20 - reserved hole at the bottom of the bottom die, 21 - vertical connecting plate, 22 - reserved groove, 23 - adjusting rod, 24 - base, 25 - vertical column, 26 - jack, 27 - middle semi-circular mold, 28 - fixing parts, 29 - top plate of the semi-circular mold, 30 - docking hook, 31 - rotating shaft, 32 - top wedge, 33 - splicing vertical plate, 34 - reserved groove, 35 - clamping holes, 36 - horizontal connecting plate, 37 - vertical connecting plate, 38 - fixing plate, 39 - clamping groove, 40 - rotating fastener, 41 - bottom splicing part, 42 - bottom wedge, 43 - bottom plate of the semi-circular mold, 44 - reserved hole of the bottom splicing part, 45 - top mold, 46 - docking hole, 47 - top mold splicing part, 48 - lifting hole of the lifting ear plate, 49 - lifting ear plate of the middle mold, 50 - inner mold, 51 - lifting handle, 52 - U-shaped clip, 53 - horizontal link, 54 - hoop, 55 - lower telescopic rod, 56 - lifting ring, 57 - top telescopic rod, 58 - telescopic sleeve, 59 - rotating rod, 60 - fixed block, 61 - lifting part, 62 - longitudinal link, 63 - hoop hole, 64 - rotating rod hole, 65 - fixed sleeve, 66 - lifting part of the longitudinal link, 67 - telescopic jack, 68 - jack link, 69 - vertical connecting bar, 70 - support base, 71 - reserved docking hole. Specific embodiments

[0050] The following further describes the present invention in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0051] Embodiment 1

[0052] As an embodiment, as Figures 1 to 17As shown in the figure, a prefabrication device for a super-large diameter reinforced concrete pipe jacking pipe joint, all the components involved are: horizontal connecting bar 1, bottom socket layer 2, pin reserved hole 3, nut 4, fixed seat 5, perforation 6, hook connecting rod 7, hook 8, U-shaped fastener 9, screw 10, plug-in pin 11, ear plate 12, bottom formwork 13, steel collar 14, bottom socket layer 15, screw hole 16, bottom formwork lifting ear plate 17, connecting rod 18, middle reserved hole of bottom formwork 19, bottom reserved hole of bottom formwork 20, vertical connecting plate 21, reserved groove 22, adjusting rod 23, base 24, vertical column 25, jack 26, middle semi-circular mold 27, fixing piece 28, semi-circular mold top plate 29, docking hook 30, rotating shaft 31, top wedge piece 32, splicing vertical plate 33, reserved groove 34, clamping hole 35, horizontal connecting plate 36, vertical connecting plate 37, fixing plate 38, clamping groove 39, rotating fastener 40, bottom splicing piece 41, bottom wedge piece 42, semi-circular mold bottom plate 43, bottom splicing piece reserved hole 44, top mold 45, docking hole 46, top mold splicing piece 47, lifting ear plate lifting hole 48, middle mold lifting ear plate 49, inner mold 50, lifting handle 51, U-shaped piece 52, horizontal connecting rod 53, hoop 54, lower telescopic rod 55, lifting ring 56, top telescopic rod 57, telescopic sleeve 58, rotating rod 59, fixing block 60, lifting piece 61, longitudinal connecting rod 62, hoop hole 63, rotating rod hole 64, fixing sleeve 65, longitudinal connecting rod lifting piece 66, telescopic jack 67, jack connecting rod 68, vertical connecting bar 69, support base 70 and docking reserved hole 71;

[0053] The pipe jacking pipe joint prefabrication device mainly includes a bottom formwork 13, a middle semi-circular mold 27, a top mold 45, an inner mold 50 and a temporary adjustment and stabilization device for the base steel collar;

[0054] The said bottom formwork 13 is located below the middle semi-circular mold 27, the top mold 45 is located above the middle semi-circular mold 27, and the inner mold 50 is located inside the inner cavity of the middle semi-circular mold 27. The pipe body is located between the middle semi-circular mold 27 and the inner mold 50;

[0055] The bottom formwork 13 mentioned above is provided with multiple stepped layers from top to bottom, which are successively the bottom socket layer 2 and the bottom spigot layer 15. The steel collar 14 is arranged along the side wall of the bottom formwork 13 at the top of the bottom spigot layer 15. A reserved groove 22 is provided on the side of the bottom formwork 13. The reserved groove 22 is provided with multiple vertical connecting plates 21. The bottom formwork 13 is provided with through screw holes 16 at the edge; A plurality of ear plates 12 are evenly arranged below the top of the bottom formwork 13. Hooks 8 and U-shaped fasteners 9 are provided on the ear plates 12; The bottom of the bottom formwork 13 is connected to the support base 70 through a connecting rod 18. A plurality of bottom formwork lifting ear plates 17 are evenly arranged on the side of the support base 70. A middle formwork reserved hole 19 is provided between the bottom socket layer 2 and the bottom spigot layer 15. A bottom formwork bottom reserved hole 20 is provided below the bottom socket layer 2; The ear plate 12 is connected to the U-shaped fastener 9 through a plug-in pin 11 and fixed with a nut 4 and a screw 10. A pin reserved hole 3 is provided at the end of the plug-in pin 11; A through hole 6 is provided in the center of the U-shaped fastener 9. A hook connecting rod 7 passes through the through hole 6 and is connected to a fixed seat 5. The fixed seat 5 is fixed in the center of the plug-in pin 11. A hook 8 is provided below the hook connecting rod 7.

[0056] The top and bottom of the middle semi-circular mold 27 mentioned above are respectively provided with a semi-circular mold top plate 29 and a semi-circular mold bottom plate 43. A reserved groove 34 is provided on the outer side wall of the middle semi-circular mold 27. Multiple vertical connecting plates 37 are arranged in the reserved groove 34 between the semi-circular mold top plate 29 and the semi-circular mold bottom plate 43. Top wedges 32 and bottom wedges 42 are respectively provided at the top and bottom of the vertical connecting plate 37. The top wedges 32 and the bottom wedges 42 are respectively welded to the semi-circular mold top plate 29 and the semi-circular mold bottom plate 43.

[0057] Multiple horizontal connecting plates 36 are evenly arranged between the vertical connecting plates 37; A plurality of fixing parts 28 are evenly arranged below the semi-circular mold top plate 29. A plurality of bottom splicing parts 41 are evenly arranged above the semi-circular mold bottom plate 43; Two middle semi-circular molds 27 are spliced into a whole at the splicing vertical plate 33. A plurality of fixing plates 38 and rotating fasteners 40 are provided on the splicing vertical plate 33. Clamping grooves 39 are provided on the fixing plates 38 and the side of the splicing vertical plate 33;

[0058] The middle semi-circular mold 27 is provided with a middle mold lifting ear plate 49 at the top. A lifting ear plate lifting hole 48 is provided on the side of the middle mold lifting ear plate 49. A plurality of through docking reserved holes 71 are evenly arranged on the top of the semi-circular mold bottom plate 43; The fixing part 28 is provided with a rotating shaft 31. A docking hook 30 is provided on the rotating shaft 31; A bottom splicing part reserved hole 44 is provided on the side of the bottom splicing part 41; The fixing plates 38 are arranged on both sides of the splicing vertical plate 33. The rotating fastener 40 is welded to one of the fixing plates 38;

[0059] Below the described top die 45, there are multiple top die splicing parts 47. There are docking holes 46 on the side of the top die splicing parts 47. The top die 45 also adopts the same multi-level stepped layer design as the bottom template 13.

[0060] The described inner die 50 adopts a variable-diameter steel die design. There are transverse connecting rods 53, lower telescopic rods 55, top telescopic rods 57, and longitudinal connecting rods 62 on the inner wall of the inner die 50. On the outer side wall of the longitudinal connecting rod 62, there is a telescopic sleeve 58 symmetrically arranged up and down. On the inner side wall of the longitudinal connecting rod 62, there is a telescopic jack 67. The longitudinal connecting rods 62 are connected by fixing blocks 60. There is a transverse connecting rod 53 on the outer side surface of the fixing block 60. There is a hoop 54 on the inner side surface of the fixing block 60. There is a rotating rod 59 inside the hoop 54. There is a hoop hole 63 on the hoop 54. There is a rotating rod hole 64 on the rotating rod 59. The tops of the two rotating rods 59 are connected by a lifting handle 51. There is a jack connecting rod 68 on the side of the telescopic jack 67. The jack connecting rods 68 are stabilized by a fixing sleeve 65. The telescopic sleeves 58 are respectively connected to the lower telescopic rod 55 and the top telescopic rod 57. There is a lifting ring 56 at the top of the top telescopic rod 57. There is a longitudinal connecting rod lifting part 66 at the top of the longitudinal connecting rod 62. There is a lifting part 61 at the top of the transverse connecting rod 53.

[0061] There are transverse connecting strips 1 and vertical connecting strips 69 on the inner wall of the described inner die 50. The transverse connecting rod 53, the top telescopic rod 57, and the longitudinal connecting rod 62 are respectively clamped between the transverse connecting strip 1 and the vertical connecting strip 69.

[0062] The temporary adjustment and stabilization device of the base steel sleeve ring is composed of an adjustment rod 23, a base 24, a vertical column 25, and a jack 26. The base 24 is located inside the bottom template 13. There is a vertical column 25 in the center of the top of the base 24. There are jacks 26 arranged along the circumference of the vertical column 25. There is an adjustment rod 23 on the side of the jack 26. The top of the adjustment rod 23 supports on the inner wall of the steel sleeve ring 14.

[0063] Embodiment 2

[0064] As another embodiment, the construction method of the super-large diameter reinforced concrete jacking pipe joint prefabrication device in Embodiment 1 includes the following steps:

[0065] Step 1. Bottom die assembly and hoisting: Align the U-shaped fastener 9 with the ear plate 12, and then fix it with screws 10 and plug-in pins 11. First, connect the bottom die hoisting ear plate 17 with a steel wire rope, and then use a crane to place the support base 70 of the bottom template 13 on a flat place.

[0066] Install the temporary adjustment and stabilization device of the base steel sleeve ring: Place the base 24 in the hole at the center of the bottom template 13, and adjust the adjustment rod 23 of the jack 26 to a suitable position.

[0067] Step 2. Install the steel sleeve ring and the grout-stop rubber strip: Lift the steel sleeve ring 14 to above the bottom socket layer 15 with a steel wire rope. Adjust the adjusting rod 23 of the jack 26 so that the adjusting rod 23 can abut against the inner wall of the steel sleeve ring 14. Then, adjust the fitting degree between the steel sleeve ring 14 and the bottom formwork 13. Then, embed a water-stop rubber ring above the bottom socket layer 15 to effectively prevent the leakage of cement slurry during concrete pouring.

[0068] Step 3. Place the steel reinforcement cage and weld the anchor bars: After the installation of the steel sleeve ring 14, remove the temporary adjustment and stabilization device of the base steel sleeve ring 14. Place the tied steel reinforcement cage on the bottom socket layer 15 of the bottom formwork 13. At the same time, weld the anchor bars on the steel sleeve ring 14, and weld the anchor bars to the bottom of the steel reinforcement cage.

[0069] Step 4. Install the middle formwork: First, splice the two middle semi-circular molds 27 at the splicing vertical plate 33. Then, rotate and adjust the rotating fastener 40 so that the rotating fastener 40 is clamped in the clamping groove 39. Then, fix it with a screw rod passing through the clamping hole 35. Connect with a steel wire rope to the lifting lug plate 49 of the middle mold. Then, use a crane to align the middle semi-circular mold 27 with the bottom formwork 13 for splicing. The bottom plate 43 of the semi-circular mold is placed on the top of the bottom formwork 13. The bottom splicing part 41 is aligned with the hook 8. Then, connect the hook 8 with the reserved hole 44 of the bottom splicing part. At the same time, align the screw hole 16 with the docking reserved hole 71 and fix it with a screw rod.

[0070] Assembly and hoisting of the inner formwork: Pass the U-shaped fastener 52 through the hoop hole 63 and the rotating rod hole 64 to fix the hoop 54 and the rotating rod 59. At the same time, fix the jack connecting rods 68 on both sides with the fixed sleeve 65. Install the transverse connecting rod 53, the top telescopic rod 57 and the longitudinal connecting rod 62 on the inner wall of the inner formwork 50 respectively. Connect with steel wire ropes to the hoisting ring 56, the hoisting part 61 and the longitudinal connecting rod hoisting part 66 respectively. Then, use a crane to place the inner formwork 50 into the inner cavity of the middle semi-circular mold 27.

[0071] Step 5. Install the upper formwork: Align the top mold 45 with the top of the top plate 29 of the semi-circular mold. At the same time, butt the fixing part 28 with the splicing part 47 of the top mold. Connect the docking hook 30 with the docking hole 46.

[0072] Step 6. Pour and cure the concrete pipe jacking pipe section: Erect a concrete pouring hopper between the top of the inner formwork 50 and the top mold 45. Pour the pipe section between the middle semi-circular mold 27 and the inner formwork 50. At the same time, carry out steam curing for the pipe section.

[0073] Step 7. Demold and inspect:

[0074] When demoulding, first release the connection between the fixing member 28 and the top die splicing member 47, and demould the top die 45;

[0075] Loosen the fixed sleeve 65, then use a wire rope to pull the rotating rod 59 upward. Under the action of the pulling force, the rotating rod 59 rotates vertically along the hoop 54, and at the same time drives the transverse connecting rod 53 to contract inward. Under the adjustment of the telescopic jack 67, the transverse connecting rod 53, the top telescopic rod 57 and the longitudinal connecting rod 62 are linked to cause the inner die 50 to reduce its diameter inward, so as to realize the demoulding of the inner die 50 without damaging the concrete;

[0076] Then demould the middle semi-circular die 27, adjust the rotating fastener 40 and release the screw at the clamping hole 35, then release the connection between the bottom splicing member 41 and the hook 8, and finally demould the bottom formwork 13;

[0077] Inspect the pipe sections after demoulding, and hoist and stack them after passing the inspection.

Claims

1. A prefabrication device for a super-large diameter reinforced concrete pipe jacking pipe section, characterized in that Comprising: A bottom template (13), a middle semi-circular mold (27), a top mold (45), an inner mold (50), and a temporary adjustment and stabilization device for the base steel collar; The bottom template (13) is located below the middle semi-circular mold (27), the top mold (45) is located above the middle semi-circular mold (27), and the two middle semi-circular molds (27) are spliced into a whole by a splicing vertical plate (33); the inner mold (50) is located inside the cavity of the middle semi-circular mold (27); longitudinal connecting rods (62) with telescopic sleeves (58) are provided on the inner wall of the inner mold (50); semi-circular mold top plates (29) and semi-circular mold bottom plates (43) are respectively provided at the top and bottom of the middle semi-circular mold (27), multiple fixing parts (28) are provided below the semi-circular mold top plate (29), and multiple bottom splicing parts (41) are provided above the semi-circular mold bottom plate (43); multiple fixing plates (38) and rotating fastening parts (40) are provided on the splicing vertical plate (33), and clamping grooves (39) are provided on the fixing plates (38) and the side of the splicing vertical plate (33); a middle mold lifting ear plate (49) is provided at the top of the middle semi-circular mold (27), a lifting ear plate lifting hole (48) is provided on the side of the middle mold lifting ear plate (49), and multiple docking reserved holes (71) are provided at the top of the semi-circular mold bottom plate (43); the fixing part (28) is provided with a rotating shaft (31), and a docking hook (30) is provided on the rotating shaft (31); a bottom splicing part reserved hole (44) is provided on the side of the bottom splicing part (41); the fixing plates (38) are provided on both sides of the splicing vertical plate (33), and the rotating fastening part (40) is welded to one end of the fixing plate (38); The bottom template (13) is provided with multiple stepped layers from top to bottom, which are successively a bottom socket layer (2) and a bottom spigot layer (15). Multiple ear plates (12) are provided below the top of the bottom template (13), and hooks (8) and U-shaped fastening parts (9) are provided on the ear plates (12); the bottom of the bottom template (13) is connected to a support base (70) through a connecting rod (18), and multiple bottom mold lifting ear plates (17) are provided on the side of the support base (70); Multiple top mold splicing parts (47) are provided below the top mold (45), docking holes (46) are provided on the side of the top mold splicing parts (47), and the top mold (45) also adopts a multi-step layer design; The temporary adjustment and stabilization device for the base steel collar includes an adjustment rod (23), a base (24), a vertical column (25), and a jack (26). The base (24) is located inside the bottom template (13), a vertical column (25) is provided at the center of the top of the base (24), jacks (26) are provided along the circumference of the vertical column (25), and the jacks (26) are supported on the inner wall of the steel collar (14) through the adjustment rod (23).

2. The prefabrication device for a super-large diameter reinforced concrete pipe jacking pipe section according to claim 1, wherein: A reserved groove (34) is provided on the outer side wall of the middle semi-circular mold (27). Multiple vertical connecting plates (37) are provided in the reserved groove (34) between the semi-circular mold top plate (29) and the semi-circular mold bottom plate (43). Multiple horizontal connecting plates (36) are evenly provided between the vertical connecting plates (37); a top wedge-shaped part (32) and a bottom wedge-shaped part (42) are respectively provided at the top and bottom of the vertical connecting plate (37). The top wedge-shaped part (32) and the bottom wedge-shaped part (42) are respectively welded and connected to the semi-circular mold top plate (29) and the semi-circular mold bottom plate (43).

3. The prefabrication device for super-large diameter reinforced concrete pipe jacking pipe joints according to claim 1, characterized in that: A reserved groove (22) is provided on the side of the bottom template (13). Multiple vertical connecting plates (21) are provided in the reserved groove (22); a steel collar (14) is arranged along the side wall of the bottom template (13) at the top of the bottom socket layer (15). The bottom template (13) is provided with screw holes (16) at the edge; a middle reserved hole (19) of the bottom mold is provided between the bottom socket layer (2) and the bottom socket layer (15). A bottom reserved hole (20) of the bottom mold is provided below the bottom socket layer (2); the ear plate (12) is connected to the U-shaped fastener (9) through a plug-and-play pin (11) and fixed with a nut (4) and a screw (10). A pin reserved hole (3) is provided at the end of the plug-and-play pin (11); a through hole (6) is provided in the center of the U-shaped fastener (9). The hook connecting rod (7) passes through the through hole (6) and is connected to the fixed seat (5). The fixed seat (5) is fixed in the center of the plug-and-play pin (11). A hook (8) is provided below the hook connecting rod (7).

4. The prefabrication device for a super-large diameter reinforced concrete pipe jacking pipe section according to claim 1, characterized in that: On the outer side wall of the longitudinal connecting rod (62), a telescopic sleeve (58) is symmetrically provided at the top and bottom respectively; a horizontal connecting rod (53), a lower telescopic rod (55) and a top telescopic rod (57) are also provided on the inner wall of the inner mold (50). A telescopic jack (67) is provided on the inner side wall of the longitudinal connecting rod (62); the longitudinal connecting rods (62) are connected through a fixing block (60). A horizontal connecting rod (53) is provided on the outer side surface of the fixing block (60). A hoop (54) is provided on the inner side surface of the fixing block (60). A rotating rod (59) is provided in the hoop (54); a hoop hole (63) is provided on the hoop (54). A rotating rod hole (64) is provided on the rotating rod (59). The tops of the ends of the two rotating rods (59) are connected through a lifting handle (51); a jack connecting rod (68) is provided on the side of the telescopic jack (67). The jack connecting rods (68) are stabilized through a fixing sleeve (65); the telescopic sleeves (58) are respectively connected to the lower telescopic rod (55) and the top telescopic rod (57). A lifting ring (56) is provided at the top of the top telescopic rod (57); a longitudinal connecting rod lifting part (66) is provided at the top of the longitudinal connecting rod (62). A lifting part (61) is provided at the top of the horizontal connecting rod (53).

5. The prefabrication device for a super-large diameter reinforced concrete pipe jacking pipe section according to claim 4, characterized in that: The inner wall of the inner mold (50) is provided with a horizontal connecting strip (1) and a vertical connecting strip (69). The horizontal connecting rod (53), the top telescopic rod (57) and the longitudinal connecting rod (62) are respectively clamped between the horizontal connecting strip (1) and the vertical connecting strip (69).

6. A construction method of a prefabrication device for super-large diameter reinforced concrete jacking pipe segments as described in any one of claims 1 to 5, characterized in that, Including the following steps: Step 1: After installing the U-shaped card fixture (9), hoist and place the bottom formwork (13) through the bottom formwork lifting lug (17); place the base (24) in the hole at the center of the bottom formwork (13). Step 2: Hoist the steel sleeve ring (14) above the bottom socket layer (15), and adjust the jack (26) so that the adjusting rod (23) presses against the steel sleeve ring (14) to fit with the bottom formwork (13). Step 3: Remove the temporary adjusting and stabilizing device for the base steel sleeve ring, place the well-tied steel reinforcement cage on the socket layer (15), and at the same time, weld the anchor bars on the steel sleeve ring (14), and weld the anchor bars to the bottom of the steel reinforcement cage. Step 4: First, splice the two middle semi-circular molds (27) at the splicing vertical plate (33); then assemble the inner mold (50) and hoist it into the inner cavity of the middle semi-circular mold (27). Step 5: Align the top mold (45) with the top of the semi-circular mold top plate (29), and at the same time, dock the fixing part (28) with the top mold splicing part (47), and connect the docking hook (30) with the docking hole (46). Step 6: Erect a concrete pouring hopper between the top of the inner mold (50) and the top mold (45), pour the pipe section between the middle semi-circular mold (27) and the inner mold (50), and at the same time, carry out steam curing for the pipe section. Step 7: First, remove the top mold (45), then remove the inner mold (50), then remove the middle semi-circular mold (27), and finally remove the bottom formwork (13).

7. The construction method of the prefabrication device for super-large diameter reinforced concrete jacking pipe joints according to claim 6, characterized in that In Step 4: Rotate and adjust the rotating card fixture (40) so that the rotating card fixture (40) is clamped in the clamping groove (39), and then fix it with a screw rod passing through the card hole (35); connect the middle mold lifting lug (49) with a steel wire rope, and then use a crane to align the middle semi-circular mold (27) with the bottom formwork (13) for splicing. The semi-circular mold bottom plate (43) is placed on the top of the bottom formwork (13), the bottom splicing part (41) is aligned with the hook (8), and then connect the hook (8) with the reserved hole (44) of the bottom splicing part. At the same time, align the screw hole (16) with the docking reserved hole (71) and fix it with a screw rod.

8. The construction method of the prefabrication device for the super-large diameter reinforced concrete pipe jacking pipe section according to claim 6, characterized in that In Step 4: The steps for assembling and hoisting the inner mold (50) are as follows: Pass the U-shaped card part (52) through the hoop hole (63) and the rotating rod hole (64) to fix the hoop (54) and the rotating rod (59), and at the same time, fix the jack connecting rods (68) on both sides with the fixed sleeve (65); install the transverse connecting rod (53), the top telescopic rod (57) and the longitudinal connecting rod (62) on the inner wall of the inner mold (50) respectively; connect the lifting rings (56), the lifting parts (61) and the longitudinal connecting rod lifting parts (66) with steel wire ropes respectively, and then use a crane to place the inner mold (50) into the inner cavity of the middle semi-circular mold (27).

9. The construction method of the prefabrication device for super-large diameter reinforced concrete jacking pipe joints according to claim 6, characterized in that, In step seven: first release the connection between the fixing member (28) and the top mold assembly member (47) to remove the top mold (45); then loosen the fixing sleeve (65), pull the rotating rod (59) upward with a wire rope, and the rotating rod (59) rotates vertically along the hoop (54), while driving the transverse connecting rod (53) to shrink inward, adjust the telescopic jack (67) so that the transverse connecting rod (53), the top telescopic rod (57) and the longitudinal connecting rod (62) are linked to cause the inner mold (50) to change its diameter inward, and demould the inner mold (50); adjust the rotating clamping member (40) and the screw at the release clamping hole (35) to remove the middle semicircular mold (27), then release the connection between the bottom assembly member (41) and the hook (8), and then remove the bottom template (13).

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