Underwater concrete bottom sealing device for super-deep large-section open caisson and construction method

Abstract

The application relates to an underwater concrete bottom sealing device for a super-deep large-section caisson and a construction method, and the main construction steps comprise the following steps: partitioning and compartmentalizing the bottom sealing area; assembling a horseback resting type steel beam; installing a horseback resting type top steel operation platform; laying a cushion layer pouring support; laying a water pump support; installing a channel steel suspension beam; erecting a top resting hanging type hanging basket operation construction platform; pre-burying a pressure expansion forming water collecting tank; installing a bottom plate fast high-precision reinforcing bar inserting device; pouring the cushion layer; and pouring the bottom plate. The horseback resting type top steel operation platform is ingenious in design, convenient to assemble and disassemble, and can greatly improve the construction efficiency; the bottom plate fast high-precision reinforcing bar inserting device can realize fast assembly, can guarantee fast positioning of the bottom plate reinforcing bar on one hand, and can be recycled on the other hand, saves the engineering cost, and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ultra-deep large section caisson underwater concrete bottom sealing device and construction method, belong to civil engineering field, it is applicable to ultra-deep large section caisson underwater concrete bottom sealing construction. BACKGROUND

[0002] In recent years, with the development of social economy and the quality of people's life is higher and higher, environmental problems are increasingly valued, and among them, the problem is increasingly urgent in major cities. Because the pump station used for sewage treatment is mostly built in the form of caisson, caisson technology has a broader application prospect in municipal engineering.

[0003] Caisson bottom sealing is one of the most important links in caisson foundation construction, and the plane size of the bottom section of ultra-deep large section caisson is large, the underwater concrete bottom sealing area is super large, and the bottom sealing volume is huge. It is difficult to break through the construction organization compared with conventional construction. In industrial construction, it is inevitable to frequently construct deep pools and equipment foundations, and the underground water level of the construction site is relatively high. In order to ensure the foundation construction, caisson is used and underwater bottom sealing method is used for construction. Because the caisson construction environment is relatively special, and the construction process involved in the traditional construction material technology is relatively complex, ordinary concrete material and pouring process cannot meet the requirements of caisson construction under complex construction conditions. At this time, the underwater cushion construction technology is used. When the caisson is bottom sealed, it is necessary to improve the standardization of underwater bottom sealing construction operation and ensure the stability and safety of the caisson structure.

[0004] Therefore, great importance should be attached to it, and a caisson underwater bottom sealing device and construction method capable of preventing quality defects need to be developed. SUMMARY

[0005] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide an ultra-deep large section caisson underwater concrete bottom sealing device and construction method.

[0006] The ultra-deep large section caisson underwater concrete bottom sealing device comprises a concrete pouring hopper, a guide pipe hopper, a water pump, a pressure expansion forming water collecting tank, a horseback resting type top steel operation platform, a top resting hanging type hanging basket operation construction platform and a bottom plate rapid high-precision reinforcing bar device. The caisson body below the cross beam is provided with a reserved hole, and the reserved hole is provided below a ring beam.

[0007] The horseback resting type steel top operating platform comprises horseback resting type steel beams, a truss operating platform, a cross beam and longitudinal beams, four horseback resting type steel beams are respectively rested on the side edges of the cross beam, two longitudinal horseback resting type steel beams are connected into a whole through the cross beam, the cross beam is rested on the longitudinal beams, and the truss operating platform is rested on the upper portion of the cross beam; the top of the truss operating platform is provided with a pouring support and a water pump support, and a concrete pouring hopper is rested on the pouring support;

[0008] The top resting hanging type hanging basket operating construction platform comprises a truss construction platform, a lifting type construction hanging basket and a channel steel suspension beam; the channel steel suspension beam is shaped, the channel steel suspension beam is rested on the ring beam, the two ends of the channel steel suspension beam are clamped on the outer side of the reserved hole, the truss construction platform is rested on the upper portion of the two sides of the channel steel suspension beam, and the lifting type construction hanging basket is hung on the lower portion of the channel steel suspension beam;

[0009] The bottom plate rapid high-precision reinforcing bar device comprises positioning pipes and positioning sleeves, the positioning sleeves are arranged on the side surfaces of the positioning pipes, and the positioning pipes are connected through connecting rods.

[0010] As preferred: the pouring support and the water pump support are arranged at the water pump and the pipe positioning portion on the top of the truss operating platform; the inner side of the bottom of the pouring support is provided with a pipe support, and the top of the pouring support supporting beam is provided with a hopper support; the top of the water pump support is provided with a water pump support cross beam; the water pump is hung on the bottom center of the water pump support cross beam, a centrifugal machine is arranged below the water pump, and a water pumping pipe is arranged on the centrifugal machine.

[0011] As preferred: the cross beam is arranged on the inner side end portions of the longitudinal horseback resting type steel beams; the two horseback resting type steel beams are connected into a whole through the longitudinal beams, the longitudinal beams are arranged on the inner side portions of the longitudinal and transverse horseback resting type steel beams, the horseback resting type steel beams are provided with hoisting lug plates on the top two ends, the hoisting lug plates are provided with lug plate holes, and the horseback resting type steel beams are provided with clamping grooves on the bottom.

[0012] As preferred: the concrete pouring hopper is provided with a hopper clamping plate on the side surface, the hopper clamping plate is rested on the hopper support, the concrete pouring hopper is provided with a flow guide pipe on the bottom, the flow guide pipe extends into a pipe hopper, the pipe hopper is provided with a pouring pipe on the bottom, and the pouring pipe is provided with a pipe clamping plate on the side surface.

[0013] As preferred: the lifting type construction hanging basket is hung on the channel steel suspension beam through a steel wire rope, the lifting type construction hanging basket is provided with a sliding lifting clamping piece on the top, the sliding lifting clamping piece is connected with the steel wire rope, and an inclined support is arranged between the vertical rod and the top rod on the side surface of the lifting type construction hanging basket; meanwhile, the sliding lifting clamping piece is connected with a wire, a motor is arranged in the side surface of the lifting type construction hanging basket, the motor is connected with the wire, and a switch is arranged on the motor.

[0014] As preferred: the positioning sleeve side is provided with a sleeve reserved hole, the connecting rod side is provided with a sleeve connecting rod reserved hole, the connecting rod is inserted into the positioning sleeve on both sides respectively, and the bottom plate fast high-precision dowel device further comprises a plug pin which is sequentially inserted into the sleeve reserved hole and the sleeve connecting rod reserved hole.

[0015] The construction method of the underwater concrete bottom sealing device for the super-deep large-section caisson, comprises the following steps:

[0016] Step one: partitioning and compartmentalizing the bottom sealing area: partitioning and compartmentalizing the bottom sealing concrete for pouring, and determining the positions of the water pump and the conduit;

[0017] Step two: installing the horseback resting type top steel operation platform: connecting the horseback resting steel beams into a whole and hoisting them to the upper part of the cross beam to rest the truss operation platform;

[0018] Step three: laying the water pump support: laying the water pump support and installing the water pump;

[0019] Step four: installing the channel steel suspension beam: using the horseback resting steel beam to hoist the channel steel suspension beam onto the ring beam, and clamping the channel steel suspension beam at the two ends outside the reserved hole;

[0020] Step five: erecting the top resting hanging type basket operation construction platform: suspending the lifting type construction basket under the channel steel suspension beam, and installing the truss construction platform on the top of the channel steel suspension beam;

[0021] Step six: pre-burying the pressure expansion forming water collecting tank: using the water pump to pump out the water inside the caisson body, using the lifting type construction basket to clean the cutting foot soil, and resting the pressure expansion forming water collecting tank;

[0022] Step seven: installing the bottom plate fast high-precision dowel device and pouring: lowering the bottom plate fast high-precision dowel device to the cushion layer to install in place, then laying the bottom plate dowel; pouring the cushion concrete; welding the bottom plate transverse reinforcement with the bottom plate dowel, and then pouring the bottom plate concrete.

[0023] As preferred, step two is specifically: welding clamping grooves at the bottom of the horseback resting steel beam, welding lifting lugs at the top of the horseback resting steel beam, welding two longitudinal horseback resting steel beams into a whole using a cross beam, and welding two transverse horseback resting steel beams into a whole using two longitudinal beams; then hoisting the horseback resting steel beam to the upper part of the cross beam using a crane, clamping the truss operation platform above the cross beam of the horseback resting steel beam.

[0024] As preferred, in step three: when using the wet sealing method for bottom sealing, laying the pouring support at the positions of the water pump and the conduit, installing the concrete pouring hopper and the conduit funnel on the pouring support, and using the pouring conduit to pour the bottom sealing concrete.

[0025] Preferably, in step seven: the bottom plate dowels are arranged through positioning tubes, and a portion of the bottom plate dowels is reserved in the cushion layer.

[0026] The beneficial effects of the present invention are:

[0027] 1) The riding shelving type top steel operating platform used in the present invention is exquisitely designed, safe and stable, and easy to assemble and disassemble, which greatly improves construction efficiency.

[0028] 2) The present invention adopts a fast and high-precision bottom plate reinforcement insertion device, which can achieve rapid assembly. On the one hand, it can ensure the rapid positioning of the bottom plate reinforcement, and on the other hand, it can be recycled, saving engineering costs and having broad application prospects.

[0029] 3) The top-mounted hanging basket operation construction platform involved in the present invention effectively utilizes the characteristics of the structure itself, is easy to install, and can realize automatic lifting, which greatly improves construction efficiency and economic benefits.

[0030] 4) The caisson concrete bottom sealing construction method of the present invention adopts a zoned and compartmented uniform and symmetrical pouring technology, which greatly improves the construction efficiency and ensures the quality of the caisson bottom sealing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the cross-section of the top pouring of the bottom concrete;

[0032] Figure 2 It is a plan view of the top of the riding shelving platform;

[0033] Figure 3 It is a plan view of the bottom of the riding shelving platform;

[0034] Figure 4 This is a cross-sectional view of the grouting conduit layout on the pouring platform;

[0035] Figure 5 This is a cross-sectional view of the water pump layout on the pouring platform;

[0036] Figure 6 It is the plan view of the bottom shelving platform;

[0037] Figure 7 It is a cross-sectional view of the bottom hanging combined shelving platform;

[0038] Figure 8 This is a cross-sectional view of the pre-buried sump in the water guide channel;

[0039] Figure 9 It is the cross-section of the cushion layer pouring;

[0040] Figure 10 This is a cross-sectional view of the reinforcement platform on the top of the bottom concrete cover;

[0041] Figure 11 This is the local structural diagram of the reinforcement platform;

[0042] Figure 12 This is the structural diagram of the reinforcement platform on the top of the bottom concrete cover;

[0043] Figure 13 This is a detailed structural drawing of the casting bracket.

[0044] In the figure: 1- cross beam, 2- hoisting ear plate, 3- riding shelving steel beam, 4- water pump and conduit positioning, 5- concrete pouring partition, 6- truss operating platform, 7- caisson shaft, 8- cross beam, 9- longitudinal beam, 10- ear plate hole, 11- diversion pipe, 12- concrete pouring hopper, 13- hopper bracket, 14- conduit funnel, 15- conduit fixing plate, 16- hopper fixing plate, 17- conduit bracket, 18- fixing groove, 19- pouring conduit, 20- reserved hole, 21- ring beam, 22- water, 23- blade foot, 24- guardrail, 25- stairs, 26- truss construction platform, 27- Sliding clamp, 28-diagonal brace, 29-lifting construction basket, 30-switch, 31-motor, 32-conductor, 33-wire rope, 34-channel steel suspension beam, 35-water pump bracket, 36-water pump bracket crossbeam, 37-water pump, 38-water pump pipe, 39-centrifuge, 40-compression-expanded water collection trough, 41-cushion, 42-bottom plate transverse reinforcement, 43-bottom plate, 44-bottom plate dowel, 45-positioning pipe, 46-connecting rod, 47-positioning sleeve, 48-casting bracket, 49-sleeve reserved hole, 50-plug-in pin, 51-sleeve connecting rod reserved hole, 52-bottom sealing concrete. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the following examples. The following examples are provided only to facilitate understanding of the present invention. It should be noted that, without departing from the principles of the present invention, it is possible for a person skilled in the art to make various modifications to the present invention, and such improvements and modifications fall within the scope of the claims of the present invention.

[0046] Example 1

[0047] As an implementation, Figures 1 to 13 As shown, an underwater concrete bottom sealing device for ultra-deep large-section caissons comprises: a riding-type top steel operating platform, a top-mounted hanging basket operating construction platform, and a bottom plate fast and high-precision reinforcement insertion device;

[0048] The riding shelving type top steel operating platform is mainly composed of a lifting ear plate 2, a riding shelving steel beam 3, a truss operating platform 6, a crossbeam 8, a longitudinal beam 9, and a fixing groove 18. The riding shelving steel beam 3 is respectively placed on both sides of the cross beam 1, and the two longitudinal riding shelving steel beams 3 are connected as a whole by two crossbeams 8. The two transverse riding shelving steel beams 3 are connected as a whole by two longitudinal beams 9. At the same time, the crossbeam 8 is placed on the longitudinal beam 9, and the truss operating platform 6 is placed on the upper part of the crossbeam 8; a plurality of casting brackets 48 and a water pump bracket 35 are arranged on the top of the truss operating platform 6, and the concrete casting hopper 12 is placed on the casting bracket 48;

[0049] The top-mounted hanging basket operation construction platform includes: guardrails 24, stairs 25, truss construction platform 26, sliding clamps 27, diagonal braces 28, lifting construction basket 29, switches 30, motors 31, conductors 32, wire ropes 33, channel steel suspension beams 34; the caisson well body 7 on both sides below the well beam 1 is provided with reserved holes 20, and a ring beam 21 is provided below the reserved holes 20; the channel steel suspension beam 34 is made of Design, the channel steel suspension beam 34 is placed on the ring beam 21, and the two ends are fixed to the outer side of the reserved hole 20, the truss construction platform 26 is placed on both sides of the upper part of the channel steel suspension beam 34, and the lower part of the channel steel suspension beam 34 is suspended with a lifting construction basket 29;

[0050] The base plate fast and high-precision reinforcement insertion device is mainly composed of a positioning tube 45, a connecting rod 46, a positioning sleeve 47, a sleeve reserved hole 49, an insertion and extraction pin 50, and a sleeve connecting rod reserved hole 51. The positioning sleeve 47 is evenly arranged on the side of the positioning tube 45 as needed, and the two positioning tubes 45 are connected by a connecting rod 46; the cross beam 8 is arranged on both sides of the inner end of the longitudinal riding shelving steel beam 3, and the longitudinal beam 9 is arranged on both sides of the inner side of the longitudinal and transverse riding shelving steel beam 3. A lifting ear plate 2 is provided in the center of the two ends of the top of the riding shelving steel beam 3, and a fixing groove 18 is provided at the bottom of the riding shelving steel beam 3.

[0051] like Figure 4 and Figure 13 As shown, the casting bracket 48 and the water pump bracket 35 are evenly arranged on the top of the truss operating platform 6 according to the water pump and conduit positioning position 4; the inner side of the bottom of the casting bracket 48 is provided with a conduit bracket 17, and the top support beam of the casting bracket 48 is provided with a hopper bracket 13; the top of the water pump bracket 35 is provided with a water pump bracket cross beam 36; the side of the concrete casting hopper 12 is provided with a hopper fixing plate 16, and the hopper fixing plate 16 is placed on the hopper bracket 13, and the bottom of the concrete casting hopper 12 is provided with a guide pipe 11, which extends into the conduit funnel 14, and a casting conduit 19 is provided below the bottom of the conduit funnel 14.

[0052] like Figure 5As shown, the water pump 37 is suspended at the center of the bottom of the water pump support beam 36, a centrifuge 39 is provided below the water pump 37, and a water pumping pipe 38 is installed below the centrifuge 39.

[0053] like Figure 1 and Figures 7 to 10 As shown, the lifting construction hanging basket 29 is suspended on the channel steel suspension beam 34 by multiple steel wire ropes 33. A sliding clamp 27 is provided on the top of the lifting construction hanging basket 29. The top of the sliding clamp 27 is connected to the steel wire rope 33. A diagonal brace 28 is provided between the vertical rod and the top rod on the side of the lifting construction hanging basket 29; at the same time, the sliding clamp 27 is connected to the wire 32, and a motor 31 is provided inside the side of the lifting construction hanging basket 29. The motor 31 is connected to the wire 32, and a switch 30 is provided on the motor 31.

[0054] like Figures 10 to 12 As shown, the side of the positioning sleeve 47 is provided with a sleeve reserved hole 49, and the side of the connecting rod 46 is provided with a sleeve connecting rod reserved hole 51. The two ends of the connecting rod 46 are respectively inserted into the positioning sleeves 47 on both sides, and the plug-in pin 50 passes through the sleeve reserved hole 49 and the sleeve connecting rod reserved hole 51 in turn.

[0055] Example 2

[0056] As another embodiment, a construction method of the ultra-deep large-section caisson underwater concrete bottom sealing device proposed in Example 1 includes the following steps:

[0057] Step 1: Customize the riding shelving steel beam 3 and channel steel suspension beam 34 and other components in the factory according to the construction drawings, and transport the concrete pouring hopper 12 and water pump 37 to the construction site;

[0058] According to the pouring area of ​​the bottom concrete 52 in the construction drawings, the concrete pouring area is divided into sections 5, and the positioning of the water pump and the conduit is determined 4;

[0059] Step 2: Assembling the riding shelving steel beams: Weld the fixing grooves 18 at the bottom of the riding shelving steel beams 3, weld the lifting lugs 2 at the top of the riding shelving steel beams 3, use two crossbeams 8 to weld the two longitudinal riding shelving steel beams 3 into a whole, and use two longitudinal beams 9 to weld the two transverse riding shelving steel beams 3 into a whole;

[0060] Installation of the riding shelving top steel operating platform: Use a crane to hoist the riding shelving steel beam 3 to the top of the crossbeam 1 and fasten it, and place the truss operating platform 6 on top of the crossbeam 8 of the riding shelving steel beam 3;

[0061] Step 3: When the wet sealing method is used for the bottom sealing, the casting brackets 48 are evenly arranged at the water pump and the guide tube positioning position 4, the concrete casting hopper 12 and the guide tube funnel 14 are installed on the casting brackets 48, and the casting guide tube 19 is used to cast the bottom sealing concrete 52 in sections;

[0062] When the dry sealing method is used for the bottom sealing, the water pump bracket 35 is evenly arranged at the water pump and the guide tube positioning position 4, and the water pump 37 is installed under the water pump bracket 35; then proceed to step 4,

[0063] Step 4: Install the channel steel suspension beam: When the dry sealing method is used for the bottom sealing, at the reserved hole 20 and the ring beam 21, the channel steel suspension beam 34 is hung on the ring beam 21 by using the riding shelving steel beam 3, and is fixed to the side of the reserved hole 20;

[0064] Step 5: Set up the top-mounted hanging basket operation construction platform: When the dry sealing method is used for the bottom sealing, the assembled lifting construction basket 29 is suspended under the channel steel suspension beam 34 with a steel wire rope 33, and a truss construction platform 26 is installed on both sides of the top of the channel steel suspension beam 34, and a staircase 25 is installed on the side of the truss construction platform 26;

[0065] Step 6: Pre-embed the compression-expanded water collecting trough: When the dry sealing method is used for the bottom sealing, first use the water pump 37 to drain the water 22 inside the caisson shaft 7, then use the lifting construction hanging basket 29 to lift it to the blade foot 23, then clean the base soil at the blade foot 23, and then put the compression-expanded water collecting trough 40 in place;

[0066] Step 7: Install the bottom plate fast high-precision reinforcement insertion device: When the dry sealing method is used for the bottom sealing, first use the lifting construction hanging basket 29 to lift the assembled bottom plate fast high-precision reinforcement insertion device to the cushion layer 41, then install the bottom plate fast high-precision reinforcement insertion device in place, and then lay the bottom plate reinforcement 44, leaving a portion of the bottom plate reinforcement 44 in the cushion layer 41;

[0067] Pouring the cushion layer: When the dry sealing method is used for the bottom sealing, after the bottom plate dowel bars 44 are laid, the cushion layer 41 concrete is poured using the lifting construction hanging basket 29;

[0068] Casting the bottom plate: When the dry sealing method is used for the bottom sealing, the bottom plate transverse reinforcement 42 and the bottom plate dowel 44 are first welded using the lifting construction hanging basket 29, and then the bottom plate 43 concrete is poured.

Claims

1. An underwater concrete bottom sealing device for ultra-deep large-section caisson, characterized in that: Including: Concrete pouring hopper (12), conduit funnel (14), water pump (37), press-expansion forming water collecting tank (40), riding-supported top steel beam operation platform, top-supported hanging basket operation construction platform, and bottom plate rapid high-precision steel bar inserting device; on both sides of the well shaft wall (7) below the cross beam (1), there are reserved holes (20), and a ring beam (21) is provided below the reserved holes (20); The riding-supported top steel beam operation platform includes riding-supported steel beams (3), truss operation platform (6), cross beams (8), and longitudinal beams (9). The four riding-supported steel beams (3) are respectively supported on the sides of the cross beam (1). The sides of the two longitudinal riding-supported steel beams (3) are connected into a whole through the cross beam (8). At the same time, the cross beam (8) is supported on the longitudinal beam (9), and the truss operation platform (6) is supported on the upper part of the cross beam (8); on the top of the truss operation platform (6), there are pouring supports (48) and water pump supports (35), and the concrete pouring hopper (12) is supported on the pouring support (48); The top-supported hanging basket operation construction platform includes a truss construction platform (26), a lifting construction hanging basket (29), and a channel steel suspension beam (34); the channel steel suspension beam (34) is in an "L" shape. The channel steel suspension beam (34) is supported on the ring beam (21). The two ends of the channel steel suspension beam (34) are clamped on the outer side of the reserved hole (20). The upper two sides of the channel steel suspension beam (34) support the truss construction platform (26), and the lower part of the channel steel suspension beam (34) suspends the lifting construction hanging basket (29); The bottom plate rapid high-precision steel bar inserting device includes positioning pipes (45) and positioning sleeves (47). The positioning sleeves (47) are arranged on the sides of the positioning pipes (45), and the positioning pipes (45) are connected through connecting rods (46); The said pouring supports (48) and water pump supports (35) are arranged at the water pump and conduit positioning positions (4) on the top of the truss operation platform (6); on the inner side of the bottom of the pouring support (48), there is a conduit support (17), and on the support beam at the top of the pouring support (48), there is a hopper support (13); on the top of the water pump support (35), there is a water pump support cross beam (36); the water pump (37) is suspended at the center of the bottom of the water pump support cross beam (36). Below the water pump (37), there is a centrifuge (39), and a water suction pipe (38) is installed below the centrifuge (39); The cross beam (8) is arranged at both sides of the inner ends of the longitudinal riding-supported steel beams (3); the two transverse riding-supported steel beams (3) are connected into a whole through the longitudinal beam (9). The longitudinal beam (9) is arranged on both sides of the inner part of the longitudinal and transverse riding-supported steel beams (3). At both ends of the top of the riding-supported steel beam (3), there are lifting ear plates (2), the lifting ear plates (2) have ear plate holes (10), and the bottom of the riding-supported steel beam (3) has a clamping groove (18); The concrete pouring hopper (12) is provided with a hopper fixing plate (16) on the side thereof, the hopper fixing plate (16) being placed on the hopper bracket (13), the bottom of the concrete pouring hopper (12) is provided with a guide pipe (11), the guide pipe (11) extends into the conduit funnel (14), a pouring conduit (19) is provided below the bottom of the conduit funnel (14), and a conduit fixing plate (15) is provided on the side thereof; The lifting construction hanging basket (29) is suspended on a channel steel suspension beam (34) by a steel wire rope (33). A sliding clamping fixture (27) is provided on the top of the lifting construction hanging basket (29). The top of the sliding clamping fixture (27) is connected to the steel wire rope (33). A diagonal brace (28) is provided between the vertical rod and the top rod on the side of the lifting construction hanging basket (29). At the same time, the sliding clamping fixture (27) is connected to a wire (32). A motor (31) is provided inside the side of the lifting construction hanging basket (29). The motor (31) is connected to the wire (32). A switch (30) is provided on the motor (31). The side of the positioning sleeve (47) is provided with a sleeve reserved hole (49), the side of the connecting rod (46) is provided with a sleeve connecting rod reserved hole (51), and the two ends of the connecting rod (46) are respectively inserted into the positioning sleeves (47) on both sides. The base plate fast and high-precision reinforcement insertion device also includes an insertion and extraction pin (50), which passes through the sleeve reserved hole (49) and the sleeve connecting rod reserved hole (51) in sequence.

2. The construction method of the ultra-deep large-section caisson underwater concrete bottom sealing device according to claim 1, characterized in that: The following steps are involved: Step 1: Divide and compartmentalize the bottom seal area: divide the bottom seal concrete (52) into concrete pouring zones (5), and determine the location of the water pump and the conduit (4); Step 2: Install the riding shelving type top steel operating platform: connect the riding shelving type steel beam (3) into a whole and hoist it to the upper part of the well beam (1), and place the truss operating platform (6); Step 3: Arrange the water pump bracket: Arrange the water pump bracket (35) and install the water pump (37); Step 4: Install the channel steel suspension beam: Use the riding shelving steel beam (3) to hang the channel steel suspension beam (34) on the ring beam (21), and fix the two ends of the channel steel suspension beam (34) to the outer side of the reserved hole (20); Step 5: Setting up a top-mounted hanging basket operation construction platform: Hang the lifting construction basket (29) below the channel steel suspension beam (34), and install the truss construction platform (26) on the top of the channel steel suspension beam (34); Step 6: Pre-buried compression-expanded water collecting trough: Use a water pump (37) to drain the water (22) inside the caisson body (7), use a lifting construction hanging basket (29) to clean the base soil of the blade foot (23), and place the compression-expanded water collecting trough (40); Step 7: Install the base plate fast high-precision reinforcement insertion device and pour concrete: lower the base plate fast high-precision reinforcement insertion device to the cushion layer (41) and install it in place, then lay the base plate reinforcement (44); pour concrete on the cushion layer (41); weld the base plate transverse steel bars (42) and the base plate reinforcement (44), and then pour concrete on the base plate (43).

3. The construction method of the ultra-deep large-section caisson underwater concrete bottom sealing device according to claim 2 is characterized in that: The specific steps of step 2 are as follows: welding a fixing groove (18) at the bottom of the riding shelving steel beam (3), welding a lifting lug plate (2) at the top of the riding shelving steel beam (3), using a crossbeam (8) to weld the two longitudinal riding shelving steel beams (3) into a whole, and using two longitudinal beams (9) to weld the two transverse riding shelving steel beams (3) into a whole; then using a crane to lift the riding shelving steel beam (3) to the upper part of the well beam (1) for fixing, and placing the truss operating platform (6) above the crossbeam (8) of the riding shelving steel beam (3).

4. The construction method of the ultra-deep large-section caisson underwater concrete bottom sealing device according to claim 2 is characterized in that: In step three: when the bottom seal is made by the wet seal method, a casting bracket (48) is arranged at the water pump and the guide tube positioning position (4), a concrete casting hopper (12) and a guide tube funnel (14) are installed on the casting bracket (48), and the casting guide tube (19) is used to cast the bottom seal concrete (52) in sections.

5. The construction method of the ultra-deep large-section caisson underwater concrete bottom sealing device according to claim 2 is characterized in that: In step seven: the bottom plate dowel bars (44) are laid out through the positioning tubes (45), and a portion of the bottom plate dowel bars (44) is reserved in the cushion layer (41).

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