A multi-cavity steel tube concrete one-time lifting and internal pouring interface structure and construction method

Abstract

A multi-cavity steel tube concrete one-time lifting internal pouring interface structure and its construction method, including a prefabricated transfer device fixedly connected to the multi-cavity steel tube, the multi-cavity steel tube includes an outer steel tube and an inner partition, the prefabricated transfer device includes an interface plate, a welding plate, a transfer tube and a forked series of pipes, the forked series of pipes includes three pipes at the same elevation, the rear end of the transfer tube passes through the transfer tube hole and is located in the middle cavity, the rear side surface of the welding plate is close to the front side surface of the long side plate and is fixedly connected thereto, the middle tube is located in the middle cavity, the tail end of the side tube is located in the side cavity, and the interface plate is fixedly connected to an external pump pipe. The present invention keeps the concrete in the multi-cavity steel tube synchronously lifted through a customized one-time lifting interface, is simple to operate, saves labor, and customizes the lifting device when processing the steel column, and casts the multi-cavity concrete together through one-time lifting, which does not affect the installation of the top steel column, greatly saving construction time.

Description

Technical Field

[0001] The invention relates to a construction auxiliary structure, in particular to a multi-cavity steel tube concrete one-time lifting and inner pouring interface structure and a construction method thereof. Background Art

[0002] Multi-cavity steel tube concrete columns are composite structures often used in super high-rise buildings as the load-bearing structure of super high-rise structures. In actual construction, there are two main methods of pouring steel tube concrete columns: high-throw concrete construction and pumped concrete jacking construction.

[0003] Concrete jacking construction is to slowly jack up the concrete from the root of the steel column to the top. Under the action of the jacking pressure, the concrete inside the steel tube concrete is dense and tightly bonded with the concrete steel plate, and segregation will not occur.

[0004] Due to the development of building structures, steel tube concrete structures are becoming increasingly complex. The emergence of multi-cavity concrete has greatly increased the difficulty of concrete jacking. When concrete is jacked once, the liquid level heights of concrete in different cavities will be different. If jacking is carried out multiple times, the complexity of the jacking structure will increase, making it inconvenient to operate. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-cavity steel tube concrete one-time lifting internal casting interface structure and its construction method, in order to solve the technical problems that the one-time lifting of a multi-cavity steel tube concrete column is difficult, the liquid level heights of concrete in different cavities are different, and multiple liftings will increase the complexity of the lifting structure and be inconvenient to operate.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] A multi-cavity steel tube concrete one-time lifting inner pouring interface structure, comprising a prefabricated transfer device fixedly connected to the multi-cavity steel tube, the multi-cavity steel tube is a three-cavity steel tube, comprising an outer steel tube and two inner partitions fixedly connected inside the outer steel tube, the outer steel tube is a rectangular steel tube, comprising long side plates on the front and rear sides and short side plates on the left and right sides, the inner partition divides the interior of the outer steel tube into three cavities, namely a side cavity and a middle cavity, the inner partition is a rectangular plate with the same height and width as the rectangular steel tube, and the two ends of the rectangular plate are respectively vertically fixedly connected to the long side plates,

[0008] The prefabricated adapter device includes an interface plate, a welding plate, an adapter tube and a bifurcated string tube. The adapter tube is arranged horizontally, and the interface plate and the welding plate are arranged vertically. An interface plate hole adapted to the size of the adapter tube is opened in the center of the interface plate, and a welding plate hole adapted to the size of the adapter tube is opened in the center of the welding plate. The adapter tube passes through the interface plate hole and the outer wall of the front end of the adapter tube is fixedly connected to the interface plate hole. The adapter tube passes through the welding plate hole and the middle outer wall of the adapter tube is fixedly connected to the welding plate.

[0009] The bifurcated series pipe is arranged horizontally, and the bifurcated series pipe includes three pipes at the same elevation, namely a middle pipe and two side pipes. The middle pipe is fixedly connected to the rear end of the transfer pipe, and the two side pipes are fixedly connected to both sides of the rear end of the transfer pipe.

[0010] A transfer tube hole is provided on the front side surface of the bottom of the middle cavity of the long side plate for the transfer tube to pass through, and a side tube hole is provided on the corresponding side tube position on the inner partition plate for the side tube to pass through. The rear end of the transfer tube passes through the transfer tube hole and is also located in the middle cavity. The rear side surface of the welding plate is tightly attached to the front side surface of the long side plate and is fixedly connected thereto. The middle tube is located in the middle cavity, and the side tubes on both sides pass through the side tube holes respectively, and the tail ends of the side tubes are located in the side cavity.

[0011] The interface plate is fixedly connected to the external pump tube.

[0012] The middle tube is a straight tube.

[0013] The side tube comprises a straight section and a curved section, wherein the curved section is located in the side cavity, and has an arc shape that curves inwards, and the direction of the tube opening of the side tube is consistent with the direction of the tube opening of the middle tube.

[0014] The ratio of the diameter of the bifurcated tube string to the diameter of the external pump tube is 0.6, and the ratio of the diameter of the bifurcated tube string to the diameter of the transfer tube is 0.72.

[0015] The length of the straight section is greater than the length of the middle tube.

[0016] The position of the pipe opening of the middle pipe is relatively backward relative to the pipe openings of the side pipes, and the pipe openings of the two side pipes are located on the same straight line.

[0017] The prefabricated switching device also includes a flow guide string pipe, which is an L-shaped turning pipe. The horizontal section is fixedly connected to the tail end of the bifurcated string pipe, and the vertical section is vertically upward. The diameter of the flow guide string pipe is the same as the diameter of the bifurcated string pipe. The turning radius of the flow guide string pipe is based on the vertical section of the flow guide string pipe not contacting the inner wall of the multi-cavity steel pipe.

[0018] The inner partition plate is provided with a concrete slurry hole, and the concrete slurry hole is located at the lower side of the side pipe hole.

[0019] The outer sleeve steel pipe is provided with concrete observation holes, and a group of concrete observation holes is provided on each cavity. A concrete observation hole in the group is arranged every 1m, and the diameter of the concrete observation hole is 2cm.

[0020] The prefabricated adapter device also includes a check valve plate, a limiter of the check valve plate is fixedly connected to the front surface of the interface plate, the check valve plate is clamped between the limiters, and the limiters are four limit rods fixedly connected to the four corners of the check valve plate. The distance between the upper and lower limit rods is adapted to the width of the check valve plate, and the length of the check valve plate is greater than the length of the interface plate.

[0021] A pump pipe switch hole is opened at one end of the check valve plate, and the check valve plate can move between the limiters in the left and right directions to control the opening and closing between the pump pipe switch hole and the interface plate hole.

[0022] A construction method using a multi-cavity steel tube concrete one-time jacking and inner pouring interface structure, the construction steps are as follows:

[0023] Step 1: Design the size of the multi-lumen steel pipe, design the size of the transfer pipe and the bifurcated string pipe according to the cavity design volume of the multi-lumen steel pipe, the flow rate and flow rate of the external pump pipe, and then prefabricate the multi-lumen steel pipe and the transfer device;

[0024] Step 2: fix the adapter to the bottom of the multi-cavity steel pipe, and each bifurcated series of pipes corresponds to a cavity;

[0025] Step 3, fix the external pump tube to the interface plate hole, and the connection is a detachable connection;

[0026] Step 4: transport the concrete in the jacking column into the cavity through an external pump pipe;

[0027] Step 5: Determine the pouring speed of concrete through the observation hole and adjust the concrete pumping pressure;

[0028] Step 6: pour concrete to the elevation;

[0029] Step seven, close the gate to seal the lifting port and push the check valve plate to close.

[0030] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0031] The present invention maintains synchronous jacking of concrete in multi-cavity steel pipes through a customized one-time jacking interface, is easy to operate, saves labor, and a customized jacking device is made during steel column processing. Multi-cavity concrete is poured together through one-time jacking, which does not affect the installation of the top steel column and greatly saves construction time.

[0032] The invention is safe to operate because it does not need to be operated in the tube concrete steel column.

[0033] The present invention ensures synchronous jacking of concrete in each cavity in the steel pipe by reasonably setting the length and diameter of the bifurcated pipe series, eliminates height differences in the concrete jacking surfaces, and removes air in the steel column, especially the air under the transverse partition, during the jacking construction, thereby avoiding the looseness of concrete under the partition and ensuring the quality of concrete pouring.

[0034] The invention can be detachably connected to the outer sleeve steel pipe, and part of the components can be recovered after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] Figure 1 It is a structural schematic diagram of the prefabricated switching device of the present invention.

[0037] Figure 2 It is a structural schematic diagram of the check valve plate.

[0038] Figure 3 It is a structural diagram of the interface board.

[0039] Figure 4 It is a structural diagram of the welded plate.

[0040] Figure 5 It is a schematic diagram of the structure of the transfer tube and the bifurcated string tube welding plate.

[0041] Figure 6 It is a structural diagram of the interface structure.

[0042] Figure 7 yes Figure 6 Schematic diagram of the top view structure.

[0043] Figure 8 It is a structural diagram of the middle partition.

[0044] Fig. 9 It is a schematic diagram of the structure of the interface board hole.

[0045] Fig.10 It is a schematic diagram of the structure of adding a flow guide series pipe.

[0046] Figure numerals: 1-inner partition, 2-long side plate, 3-short side plate, 4-side cavity, 5-middle cavity, 6-interface plate, 7-welding plate, 8-transfer tube, 9-interface plate hole, 10-welding plate hole, 11-middle tube, 12-side tube, 121-straight section, 122-curved section, 13-transfer tube hole, 14-side tube hole, 15-concrete slurry hole, 16-concrete observation hole, 17-check valve plate, 18-limiting piece, 19-pump pipe switch hole, 20-flow guide series pipe. DETAILED DESCRIPTION

[0047] See Example Figure 1-9As shown, a multi-cavity steel tube concrete one-time lifting and inner pouring interface structure, see Figure 6 As shown, it includes a prefabricated transition device fixedly connected to a multi-cavity steel pipe, the multi-cavity steel pipe is a three-cavity steel pipe, including an outer steel pipe and two inner partitions 1 fixedly connected inside the outer steel pipe, the outer steel pipe is a rectangular steel pipe, including long side plates 2 on the front and back sides and short side plates 3 on the left and right sides, the inner partition 1 divides the interior of the outer steel pipe into three cavities, namely a side cavity 4 and a middle cavity 5, the inner partition 1 is a rectangular plate with the same height and width as the rectangular steel pipe, and the two ends of the rectangular plate are respectively vertically fixedly connected to the long side plates 2.

[0048] See also Figure 1-5 As shown, the prefabricated adapter device includes an interface plate 6, a welding plate 7, a adapter tube 8 and a forked string tube. The adapter tube 8 is horizontally arranged, and the interface plate 6 and the welding plate 7 are vertically arranged. An interface plate hole 9 corresponding to the size of the adapter tube 8 is opened in the center of the interface plate 6, and a welding plate hole 10 corresponding to the size of the adapter tube 8 is also opened in the center of the welding plate 7. The adapter tube 8 passes through the interface plate hole 9 and the outer wall of the front end of the adapter tube 8 is fixedly connected to the interface plate hole 9. The adapter tube 8 passes through the welding plate hole 10 and the middle outer wall of the adapter tube 8 is fixedly connected to the welding plate 7.

[0049] The forked string pipe is arranged horizontally, and the forked string pipe includes three pipes at the same elevation, namely a middle pipe 11 and two side pipes 12. The diameter of the middle pipe 11 is smaller than that of the switching pipe and is fixedly connected to the rear end of the switching pipe 8. The two side pipes 12 are fixedly connected to both sides of the rear end of the switching pipe 8.

[0050] See also Figure 6-9 As shown, the front side surface of the bottom of the middle cavity position of the long side plate 2 is provided with a transfer tube hole 13 for the transfer tube 8 to pass through, and the inner partition plate 1 is provided with a side tube hole 14 for the side tube 12 to pass through at the corresponding position of the side tube 12. The rear end of the transfer tube 8 passes through the transfer tube hole 13 and is also located in the middle cavity 5. The rear side surface of the welding plate 7 is close to the front side surface of the long side plate 2 and is fixedly connected thereto, and the fixed connection is a welding connection. The middle tube 11 is located in the middle cavity 5, and the side tubes 12 on both sides pass through the side tube holes 14 respectively. The tail end of the side tube 12 is located in the side cavity 4, and the interface plate 6 is fixedly connected to the external pump tube. The interface plate and the external pump tube are connected by bolts.

[0051] See also Figure 5 As shown, the middle tube 11 is a straight tube. The side tube 12 includes a straight section 121 and a curved section 122, the curved section 122 is located in the side cavity 4, the curved section 122 is in an arc shape and bends inward, and the direction of the side tube 12 is consistent with that of the middle tube 11.

[0052] To ensure that the concrete surface of the cavity rises synchronously when the steel tube concrete column is lifted, the volume ratio of the three bifurcated series pipes Q1, Q2, and Q3 must be consistent with the volume ratio of the steel tube concrete column cavity. The areas of Q1, Q2, and Q3 need to be determined through experience and the volume ratio of the steel tube concrete column cavity during actual construction. According to the flow characteristics of concrete and the relevant equations of fluid mechanics, it is calculated that the ratio of the diameter of the bifurcated series pipe to the diameter of the external pump pipe is 0.6, and the ratio of the diameter of the bifurcated series pipe to the diameter of the transfer pipe 8 is 0.72.

[0053] The length of the straight section 121 is greater than that of the middle tube 11. The opening of the middle tube 11 is located behind the opening of the side tubes 12, and the openings of the two side tubes 12 are located on the same straight line.

[0054] See also Figure 6-9 As shown, the inner partition 1 is provided with a concrete slurry hole 15, and the concrete slurry hole 15 is located at the lower side of the side pipe hole 14. The outer steel pipe is provided with a concrete observation hole 16, and a group of concrete observation holes is provided in each cavity. A concrete observation hole in the group is provided every 1m, and the diameter of the concrete observation hole is 2cm. Observation holes and concrete slurry holes are required for steel pipe columns. The partition openings are designed for the inner partitions of the steel pipe, especially the complex nodes, so that it can not only ensure that the force transmission performance of the partition is not affected, but also keep the concrete pressure basically consistent during the pouring process. The concrete observation holes are convenient for observing the concrete jacking and pouring conditions of each cavity.

[0055] See also Fig.10 As shown, the prefabricated switching device also includes a flow guide string pipe 20, which is an L-shaped turning pipe, the horizontal section of which is fixedly connected to the tail end of the bifurcated string pipe, and the vertical section is vertically upward. The diameter of the flow guide string pipe 20 is the same as that of the bifurcated string pipe, and the turning radius of the flow guide string pipe 20 is based on the vertical section of the flow guide string pipe not contacting the inner wall of the multi-cavity steel pipe. The main function of the flow guide string pipe is to guide the jacking of the concrete vertical jacking channel.

[0056] See also Figure 1-2 As shown, the prefabricated adapter also includes a check valve plate 17, and a limiter 18 of the check valve plate is fixedly connected to the front surface of the interface plate 6. The main function of the limiter 18 is to limit the position of the check valve plate, so as to facilitate the check valve to control the concrete lifting and closing. The check valve plate 17 is clamped between the limiters 18, and the limiters 18 are four limiter rods fixedly connected to the four corners of the check valve plate. The distance between the upper and lower limiter rods is adapted to the width of the check valve plate 17, and the length of the check valve plate 17 is greater than the length of the interface plate 6. A pump pipe switch hole 19 is opened at one end of the check valve plate 17, and the check valve plate 17 can move between the limiters 18 in the left and right directions to control the opening and closing between the pump pipe switch hole 19 and the interface plate hole 9.

[0057] The construction method of the multi-cavity steel tube concrete one-time lifting and internal pouring interface structure has the following construction steps:

[0058] Step 1, design the size of the multi-lumen steel pipe, design the size of the transfer pipe 8 and the bifurcated series pipe according to the cavity design volume of the multi-lumen steel pipe, the flow rate and flow rate of the external pump pipe, and then prefabricate the multi-lumen steel pipe and the transfer device;

[0059] Step 2: fix the adapter to the bottom of the multi-cavity steel pipe, and each bifurcated series of pipes corresponds to a cavity;

[0060] Step 3, fix the external pump tube to the interface plate hole 9, and the connection is a detachable connection;

[0061] Step 4: transport the concrete in the jacking column into the cavity through an external pump pipe;

[0062] Step 5: Determine the pouring speed of concrete through the observation hole and adjust the concrete pumping pressure;

[0063] Step 6: pour concrete to the elevation;

[0064] Step seven, close the gate to seal the lifting port, and push the check valve plate 17 to close.

[0065] During the lifting process, a dedicated person shall be assigned to observe the speed of lifting and pouring, contact the concrete pump operator in time, and adjust the pump speed and pressure at any time. If any abnormality is found, the pump shall be stopped immediately, and lifting can be carried out after the cause is found out.

[0066] If blockage is found inside the pump pipe, stop the pump immediately, close the non-return raft at the interface, remove the pump pipe, and continue jacking after the blockage is cleared.

[0067] If the pipe is found to be blocked inside the steel column, stop the pump immediately, close the non-return raft at the interface, and then re-drill a hole in the steel column above the concrete pouring surface before pouring.

Claims

1. A multi-cavity steel tube concrete one-time lifting and internal pouring interface structure, Features: The invention comprises a prefabricated transfer device fixedly connected to a multi-cavity steel pipe, wherein the multi-cavity steel pipe is a three-cavity steel pipe, comprising an outer steel pipe and two inner partitions (1) fixedly connected inside the outer steel pipe, wherein the outer steel pipe is a rectangular steel pipe, comprising long side plates (2) on the front and rear sides and short side plates (3) on the left and right sides, wherein the inner partition (1) divides the interior of the outer steel pipe into three cavities, namely a side cavity (4) and a middle cavity (5), wherein the inner partition (1) is a rectangular plate having the same height and width as the rectangular steel pipe, wherein the two ends of the rectangular plate are respectively fixedly connected vertically to the long side plates (2). The prefabricated adapter device comprises an interface plate (6), a welding plate (7), an adapter tube (8) and a bifurcated string tube, wherein the adapter tube (8) is arranged horizontally, and the interface plate (6) and the welding plate (7) are arranged vertically. The interface plate (6) is provided with an interface plate hole (9) in the center thereof, which is adapted to the size of the adapter tube (8). The welding plate (7) is also provided with a welding plate hole (10) in the center thereof, which is adapted to the size of the adapter tube (8). The adapter tube (8) passes through the interface plate hole (9) and the outer wall of the front end of the adapter tube (8) is fixedly connected to the interface plate hole (9). The adapter tube (8) passes through the welding plate hole (10) and the outer wall of the middle portion of the adapter tube (8) is fixedly connected to the welding plate (7). The bifurcated pipe series is arranged horizontally, and comprises three pipes at the same elevation, namely a middle pipe (11) and two side pipes (12). The middle pipe (11) is fixedly connected to the rear end of the transfer pipe (8), and the two side pipes (12) are fixedly connected to both sides of the rear end of the transfer pipe (8). A transfer tube hole (13) is formed on the front side surface of the bottom of the middle cavity of the long side plate (2) for the transfer tube (8) to pass through, and a side tube hole (14) is formed on the inner partition plate (1) at a position corresponding to the side tube (12) for the side tube (12) to pass through. The rear end of the transfer tube (8) passes through the transfer tube hole (13) and is also located in the middle cavity (5). The rear side surface of the welding plate (7) is closely attached to the front side surface of the long side plate (2) and is fixedly connected thereto. The middle tube (11) is located in the middle cavity (5). The side tubes (12) on both sides respectively pass through the side tube holes (14). The rear end of the side tube (12) is located in the side cavity (4). The interface plate (6) is fixedly connected to the external pump tube; The middle tube (11) is a straight tube; The side tube (12) comprises a straight section (121) and a curved section (122); the curved section (122) is located in the side cavity (4); the curved section (122) is in an arc shape and bends inward; the direction of the tube opening of the side tube (12) is consistent with the direction of the tube opening of the middle tube (11); The ratio of the diameter of the bifurcated tube string to the diameter of the external pump tube is 0.6, and the ratio of the diameter of the bifurcated tube string to the diameter of the transfer tube (8) is 0.72; The length of the straight section (121) is greater than the length of the middle tube (11); The position of the pipe opening of the middle pipe (11) is relatively rearward relative to the pipe openings of the side pipes (12), and the pipe openings of the two side pipes (12) are located on the same straight line; The prefabricated switching device further comprises a flow guiding string pipe (20), wherein the flow guiding string pipe is an L-shaped turning pipe, wherein the horizontal section is fixedly connected to the tail end of the bifurcated string pipe, and the vertical section is vertically upward, the pipe diameter of the flow guiding string pipe (20) is the same as the pipe diameter of the bifurcated string pipe, and the turning radius of the flow guiding string pipe (20) is based on the vertical section of the flow guiding string pipe not contacting the inner wall of the multi-cavity steel pipe.

2. The multi-cavity steel tube concrete one-time lifting and inner pouring interface structure according to claim 1, Features: The inner partition plate (1) is provided with concrete slurry holes (15), the concrete slurry holes (15) are located at the lower side of the side pipe holes (14), the outer steel pipe is provided with concrete observation holes (16), a group of concrete observation holes is provided in each cavity, one concrete observation hole in the group is provided every 1m, and the diameter of the concrete observation holes is 2cm.

3. The multi-cavity steel tube concrete one-time lifting and inner pouring interface structure according to claim 1, Features: The prefabricated adapter device further comprises a check valve plate (17), a front side surface of the interface plate (6) being fixedly connected to a stopper (18) of the check valve plate, the check valve plate (17) being clamped between the stopper (18) up and down, the stopper (18) being four stopper rods fixedly connected to the four corners of the check valve plate, the distance between the upper and lower stopper rods being adapted to the width of the check valve plate (17), the length of the check valve plate (17) being greater than the length of the interface plate (6), A pump pipe switch hole (19) is formed at one end of the check valve plate (17). The check valve plate (17) is movable between the limit members (18) in the left-right direction to control the opening and closing of the pump pipe switch hole (19) and the interface plate hole (9).

4. A construction method for a one-time jacking and inner pouring interface structure of a multi-cavity steel tube concrete using any one of claims 1 to 3, It is characterized in that The construction steps are as follows: Step 1, designing the size of the multi-lumen steel pipe, designing the size of the transfer pipe (8) and the bifurcated series pipe according to the designed volume of the cavity of the multi-lumen steel pipe, the flow rate and flow rate of the external pump pipe, and then prefabricating the multi-lumen steel pipe and the transfer device; Step 2: fix the adapter to the bottom of the multi-cavity steel pipe, and each bifurcated series of pipes corresponds to a cavity; Step 3, fix the external pump tube to the interface plate hole (9), and the connection is a detachable connection; Step 4: transport the concrete in the jacking column into the cavity through an external pump pipe; Step 5: Determine the pouring speed of concrete through the observation hole and adjust the concrete pumping pressure; Step 6: pour concrete to the elevation; Step 7: Close the gate to seal the lifting port and push the check valve plate (17) to close.

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