Concrete filled steel tube support
Through the design of internal and external connection components, the problem of insufficient connection stability of steel pipe concrete brackets after injection of concrete is solved, the stability and bearing capacity of the brackets are improved, and the safety of use is ensured.
Patent Information
- Application Number
- CN202422654800.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-31
AI Technical Summary
After the existing steel pipe concrete bracket is injected into concrete, the connection stability of the connecting parts is affected, which affects the overall bearing capacity and stability, and thus affects the safety of use.
The combination design of the inner connecting assembly and the outer connecting assembly is threaded to connect the inside of the top and bottom bracket tubes. The outer connecting assembly is fastened to fix the outside of the top and bottom bracket tubes by clamping and locking, and the injection and discharge of concrete can be achieved with the grouting pipe and exhaust slurry holes.
The axial and radial bearing capacity of the pipe connection position of the top and bottom brackets is improved, the connection stability is enhanced, and the overall stability and bearing capacity of the steel pipe concrete bracket is improved, ensuring safety in use.
Smart Images
Figure CN223164541U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of support structures, and particularly to a concrete-filled steel tube support. Background Art
[0002] The steel tube support structure is an efficient support method for large-section soft rock inclined shafts. This technology combines the high-strength characteristics of steel tubes and the compressive performance of concrete. By filling concrete inside the steel tubes, a new type of composite support structure is formed. When this structure bears the pressure of the shaft wall, the steel tubes provide tensile strength, while the concrete bears the pressure. The two work together to significantly improve the overall bearing capacity and stability of the support structure.
[0003] In practical applications, the concrete-filled steel tube support technology needs to be designed and constructed according to specific engineering conditions and geological environments, including selecting appropriate steel tube diameters and wall thicknesses, determining the concrete mix ratio and casting method, and optimizing the layout and connection methods of the supports. Existing concrete-filled steel tube supports usually first use connectors to connect multiple steel tubes into a set shape, and then inject concrete into the steel tubes through grouting holes to complete the installation of the concrete-filled steel tube supports.
[0004] Existing connectors can meet the connection strength requirements of steel tubes before concrete injection. However, after concrete is injected into the steel tubes, the connection stability of existing connectors is affected, which will affect the overall bearing capacity and stability of the concrete-filled steel tube supports, and further affect the use safety of the concrete-filled steel tube supports. Utility Model Content
[0005] In order to improve the connection stability at the connection positions of the concrete-filled steel tube supports, thereby enhancing the overall stability and bearing capacity of the concrete-filled steel tube supports, and further improving the use safety of the concrete-filled steel tube supports, this application provides a concrete-filled steel tube support.
[0006] This application provides a concrete-filled steel tube support, adopting the following technical solutions:
[0007] A concrete-filled steel tube support includes a top support tube. Both ends of the top support tube are connected with bottom support tubes. A connection device is arranged at the connection position between the top support tube and the bottom support tubes. The connection device includes an inner connection component and an outer connection component. The inner connection component is arranged inside the top support tube and the bottom support tubes, and the outer connection component is arranged outside the top support tube and the bottom support tubes. A grouting tube for concrete injection is arranged on each bottom support tube, and an exhaust and slurry discharge hole for air and excess concrete to be discharged is arranged at the top end of the top support tube.
[0008] By adopting the above technical solutions, the use of the internal connection component helps to connect the top support pipe and the bottom support pipe from the inside of both, and at the same time helps to improve the axial and radial bearing capacities of the connection position between the top support pipe and the bottom support pipe; the use of the external connection component helps to connect the top support pipe and the bottom support pipe from the outside of both, and at the same time helps to improve the radial bearing capacity of the connection position between the top support pipe and the bottom support pipe; the cooperation of the internal connection component and the external connection component helps to improve the connection stability of the connection position between the top support pipe and the bottom support pipe, thereby improving the overall stability and bearing capacity of the concrete-filled steel tube support, and further improving the use safety of the concrete-filled steel tube support. The use of the grouting pipe helps to inject concrete into the inside of the bottom support pipe and the top support pipe, and the use of the exhaust and slurry discharge holes helps to facilitate the discharge of air and excess concrete inside the bottom support pipe and the top support pipe, thereby helping to realize the construction of the concrete-filled steel tube support.
[0009] In a specific feasible embodiment, the internal connection component includes a connecting pipe, a butt ring block and an anti-slip gasket. An external thread is provided on the circumferential outer wall of the connecting pipe, and internal threads are provided on the inner walls of the top support pipe and the bottom support pipe. One end of the connecting pipe is inserted into the top support pipe and is threadedly connected to the top support pipe, and the other end of the connecting pipe is inserted into the bottom support pipe and is threadedly connected to the bottom support pipe. The butt ring block is fixedly sleeved on the connecting pipe, and the outer diameters of the top support pipe and the bottom support pipe are the same as the outer diameter of the butt ring block. The anti-slip gasket is arranged on both side walls of the butt ring block.
[0010] By adopting the above technical solutions, the use of the connecting pipe helps to be threadedly connected to the top support pipe and the bottom support pipe, thereby helping to improve the axial and radial bearing capacities of the connection position between the top support pipe and the bottom support pipe; the use of the butt ring block and the anti-slip gasket helps to prevent relative rotation between the top support pipe and the bottom support pipe and the connecting pipe, thereby helping to improve the connection stability between the top support pipe and the bottom support pipe and the connecting pipe, and further helping to improve the connection stability of the connection position between the top support pipe and the bottom support pipe.
[0011] In a specific feasible embodiment, a sleeve is provided on the circumferential outer wall of the butt ring block, and the circumferential outer walls of the top support pipe and the bottom support pipe are tightly abutted and fitted with the inner wall of the sleeve.
[0012] By adopting the above technical solutions, the use of the sleeve helps to be sleeved around the circumferences of the top support pipe and the bottom support pipe, thereby helping to further improve the radial bearing capacity of the connection position between the top support pipe and the bottom support pipe, and further improving the connection stability of the connection position between the top support pipe and the bottom support pipe.
[0013] In a specific feasible embodiment, the external connection component includes a first clamping semi-ring, a second clamping semi-ring, and a locking clamp. The first clamping semi-ring and the second clamping semi-ring are clamped and fixed together and sleeved on the outer periphery of the casing. The axial lengths of the first clamping semi-ring and the second clamping semi-ring are both greater than the axial length of the casing. The locking clamp is arranged on the outer periphery of the first clamping semi-ring and the second clamping semi-ring.
[0014] By adopting the above technical solution, the first clamping semi-ring and the second clamping semi-ring are helpful for clamping and sleeving on the outer wall of the casing. The locking clamp is helpful for clamping and fixing the first clamping semi-ring and the second clamping semi-ring, thereby further improving the radial bearing capacity of the connection position between the top support pipe and the bottom support pipe, further enhancing the connection stability of the connection position between the top support pipe and the bottom support pipe, improving the overall stability and bearing capacity of the concrete-filled steel tube support, and enhancing the use safety of the concrete-filled steel tube support.
[0015] In a specific feasible embodiment, positioning slots are arranged on the outer wall of the casing. Positioning blocks for inserting into the positioning slots are arranged on the inner circumferential walls of the first clamping semi-ring and the second clamping semi-ring. A positioning block is arranged on the axial inner wall of the locking clamp. The axial side walls of the first clamping semi-ring and the second clamping semi-ring are both abutted against the positioning block.
[0016] By adopting the above technical solution, inserting the positioning block into the positioning slot helps to improve the stability of the first clamping semi-ring and the second clamping semi-ring clamped and sleeved on the casing. The positioning block helps to limit the positions of the first clamping semi-ring and the second clamping semi-ring, thereby further improving the stability of the first clamping semi-ring and the second clamping semi-ring clamped and sleeved on the casing. In addition, the positioning block helps to position the locking clamp, thereby helping to improve the clamping and fixing effect of the locking clamp on the first clamping semi-ring and the second clamping semi-ring.
[0017] In a specific feasible embodiment, blocking blocks are arranged on the axial inner walls of the first clamping semi-ring and the second clamping semi-ring. Flexible sealing blocks are arranged on the blocking blocks. Grouting holes are penetrated through the locking clamp and the first clamping semi-ring. Vent holes are penetrated through the locking clamp and the second clamping semi-ring.
[0018] By adopting the above technical solution, the use of the blocking block and the flexible sealing block helps to form a cavity between the first clamping half-ring, the second clamping half-ring, the sleeve and the bottom support pipe (or the top support pipe). The use of the grouting hole and the exhaust hole helps to inject concrete into the cavity, thereby helping to further improve the connection stability between the first clamping half-ring, the second clamping half-ring, the sleeve and the bottom support pipe (or the top support pipe), helping to further improve the connection stability at the connection position between the top support pipe and the bottom support pipe, further enhancing the overall stability and bearing capacity of the concrete-filled steel tubular support, and further improving the use safety of the concrete-filled steel tubular support.
[0019] In a specific feasible implementation, a plurality of auxiliary rib plates are arranged on the outer wall of each end of the bottom support pipe away from the top support pipe, and the auxiliary rib plates are used to support the bottom support pipe.
[0020] By adopting the above technical solution, the use of the auxiliary rib plates helps to support the bottom support pipe, thereby helping to improve the stability of the bottom support pipe during the construction of the concrete-filled steel tubular support.
[0021] In a specific feasible implementation, a square steel plug is arranged at each end of the bottom support pipe away from the top support pipe, and the square steel plug is used to block the pipe orifice at the end of the bottom support pipe away from the top support pipe.
[0022] By adopting the above technical solution, the use of the square steel plug helps to block the pipe orifice at the end of the bottom support pipe away from the top support pipe, thereby helping to prevent the concrete from flowing out of the pipe orifice.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. Through the setting of the inner connection component and the outer connection component in the present application, the inner connection component helps to thread-connect the top support pipe and the bottom support pipe from the inside of the two, thereby helping to improve the axial and radial bearing capacities at the connection position between the top support pipe and the bottom support pipe; the outer connection component helps to connect the top support pipe and the bottom support pipe from the outside of the two, thereby helping to improve the radial bearing capacity at the connection position between the top support pipe and the bottom support pipe; the cooperation of the inner connection component and the outer connection component helps to improve the connection stability at the connection position between the top support pipe and the bottom support pipe, thereby enhancing the overall stability and bearing capacity of the concrete-filled steel tubular support, and further improving the use safety of the concrete-filled steel tubular support.
[0025] 2. By providing the casing, the blocking block and the flexible sealing block in this application, a cavity is formed between the first clamping half-ring, the second clamping half-ring, the casing and the bottom support pipe (or the top support pipe). Injecting concrete into the cavity through the grouting hole helps to enhance the connection stability between the first clamping half-ring, the second clamping half-ring, the casing and the bottom support pipe (or the top support pipe), thereby contributing to improving the connection stability at the connection position between the top support pipe and the bottom support pipe, further enhancing the overall stability and bearing capacity of the concrete-filled steel tubular support, and further improving the use safety of the concrete-filled steel tubular support. Brief Description of the Drawings
[0026] Figure 1 is the overall structural schematic diagram of an embodiment of this application.
[0027] Figure 2 is a partial structural explosion diagram showing the specific structure of the connecting device.
[0028] Figure 3 is a partial structural cross-sectional view showing the specific structure of the connecting device.
[0029] Description of the reference numerals: 1. Top support pipe; 2. Bottom support pipe; 3. Inner connecting assembly; 31. Connecting pipe; 32. Abutting ring block; 33. Anti-slip gasket; 4. Outer connecting assembly; 41. First clamping half-ring; 42. Second clamping half-ring; 43. Locking clamp; 5. Grouting pipe; 6. Exhaust and slurry discharge hole; 7. External thread; 8. Internal thread; 9. Casing; 10. Positioning slot; 11. Positioning block; 12. Positioning block; 13. Blocking block; 14. Sealing block; 15. Grouting hole; 16. Exhaust hole; 17. Auxiliary rib plate; 18. Square steel plug; 19. Cavity. Detailed Description of the Embodiment
[0030] The following further elaborates on this application with reference to the accompanying drawings.
[0031] An embodiment of this application discloses a concrete-filled steel tubular support. Referring to Figure 1 , it includes two bottom support pipes 2 placed vertically at intervals. A plurality of auxiliary rib plates 17 are fixedly connected to the side wall of the bottom end of each bottom support pipe 2, and a square steel plug 18 is fixedly installed at the bottom end pipe orifice of each bottom support pipe 2. The top ends of the two bottom support pipes 2 are jointly connected with an arc-shaped top support pipe 1, and a connecting device is provided at the connection position between each bottom support pipe 2 and the top support pipe 1. A grouting pipe 5 is fixedly communicated with the bottom of each bottom support pipe 2, and an exhaust and slurry discharge hole 6 communicating with the inside of the top support pipe 1 is opened at the top end of the top support pipe 1.
[0032] Referring to Figure 1, during the construction of the concrete-filled steel tubular support, the operator fixes and connects the tops of two bottom support tubes 2 and the two ends of the top support tube 1 through a connecting device. Then, concrete is injected into the bottom support tube 2 and the top support tube 1 through the grouting pipe 5. During the injection of the concrete, the air inside the bottom support tube 2 and the top support tube 1 is discharged from the exhaust and slurry discharge holes 6. When the concrete is filled, the excess concrete will be discharged from the exhaust and slurry discharge holes 6, thus completing the construction of the concrete-filled steel tubular support. The auxiliary rib plate 17 helps to support the bottom support tube 2, thus helping to improve the stability of the bottom support tube 2 during the construction of the concrete-filled steel tubular support. The square steel plug 18 helps to block the bottom pipe orifice of the bottom support tube 2, thus helping to prevent the concrete from flowing out from the bottom pipe orifice.
[0033] Refer to Figure 3 , the connecting device includes an inner connecting component 3. The inner connecting component 3 includes a connecting pipe 31, a butting ring block 32 and an anti-slip gasket 33. An external thread 7 is integrally formed on the circumferential outer wall of the connecting pipe 31. Inner threads 8 are integrally formed on the inner walls of the top support tube 1 and the bottom support tube 2 near the connecting position. One end of the connecting pipe 31 is inserted into the top support tube 1 and is threadedly connected to the top support tube 1. The other end of the connecting pipe 31 is inserted into the bottom support tube 2 and is threadedly connected to the bottom support tube 2. The inner diameters of the top support tube 1 and the bottom support tube 2 are the same as the inner diameter of the connecting pipe 31. The butting ring block 32 is fixedly sleeved on the connecting pipe 31, and the outer diameters of the top support tube 1 and the bottom support tube 2 are the same as the outer diameter of the butting ring block 32. The anti-slip gaskets 33 are fixedly installed on the two side walls of the butting ring block 32. A sleeve 9 is fixedly connected to the circumferential outer wall of the butting ring block 32. The circumferential outer walls of the top support tube 1 and the bottom support tube 2 are tightly abutted and fitted with the inner wall of the sleeve 9.
[0034] Refer to Figure 2 and Figure 3 , when connecting the top support tube 1 and the bottom support tube 2, the operator first inserts one end of the connecting pipe 31 into the top support tube 1 and rotates the connecting pipe 31 so that the connecting pipe 31 is threadedly connected to the top support tube 1, and at the same time makes the axial side wall of the top support tube 1 abut tightly against the anti-slip gasket 33. The operator then inserts the other end of the connecting pipe 31 into the bottom support tube 2 and rotates the bottom support tube 2 so that the connecting pipe 31 is threadedly connected to the bottom support tube 2, and at the same time makes the axial side wall of the bottom support tube 2 abut tightly against the other anti-slip gasket 33.
[0035] Refer to Figure 2 and Figure 3, the connecting pipe 31 helps to connect the top support pipe 1 and the bottom support pipe 2 together, thus helping to improve the axial and radial bearing capacities at the connection position of the top support pipe 1 and the bottom support pipe 2. The abutting ring block 32 and the anti-slip gasket 33 help to prevent relative rotation between the top support pipe 1 and the bottom support pipe 2 and the connecting pipe 31, thus helping to improve the connection stability between the top support pipe 1 and the bottom support pipe 2 and the connecting pipe 31, and further helping to improve the connection firmness at the connection position of the top support pipe 1 and the bottom support pipe 2. The sleeve 9 helps to be sleeved on the outer periphery of the top support pipe 1 and the bottom support pipe 2, thus helping to further improve the radial bearing capacity at the connection position of the top support pipe 1 and the bottom support pipe 2, and further improving the connection firmness at the connection position of the top support pipe 1 and the bottom support pipe 2.
[0036] Referring to Figure 2 and Figure 3 , the connecting device further includes an outer connection assembly 4. The outer connection assembly 4 includes a first clamping half-ring 41, a second clamping half-ring 42 and a locking clamp 43. A circumferential positioning slot 10 is formed on the outer wall of the sleeve 9 along the circumferential direction. Positioning blocks 11 are integrally formed on the circumferential inner walls of the first clamping half-ring 41 and the second clamping half-ring 42. The first clamping half-ring 41 and the second clamping half-ring 42 are clamped and fixed on the outer periphery of the sleeve 9. The axial lengths of the first clamping half-ring 41 and the second clamping half-ring 42 are both greater than the axial length of the sleeve 9. The locking clamp 43 is clamped and fixed on the outer periphery of the first clamping half-ring 41 and the second clamping half-ring 42, and two groups of positioning blocks 12 are fixedly spaced on the axial inner wall of the locking clamp 43. The distance between the two groups of positioning blocks 12 is the same as the axial length of the first clamping half-ring 41 and the second clamping half-ring 42.
[0037] Referring to Figure 2 and Figure 3 , the operator clamps and fixes the first clamping half-ring 41 and the second clamping half-ring 42 on the outer periphery of the sleeve 9 and makes the positioning blocks 11 inserted into the positioning slots 10, and then uses the locking clamp 43 to clamp and fix on the outer periphery of the first clamping half-ring 41 and the second clamping half-ring 42, thus helping to further improve the radial bearing capacity at the connection position of the top support pipe 1 and the bottom support pipe 2, further improving the connection firmness at the connection position of the top support pipe 1 and the bottom support pipe 2, improving the overall stability and bearing capacity of the concrete-filled steel tube support, and improving the use safety of the concrete-filled steel tube support. The positioning blocks 12 help to position the clamping and fixing position of the locking clamp 43, thus helping to improve the clamping and fixing effect of the locking clamp 43 on the first clamping half-ring 41 and the second clamping half-ring 42.
[0038] Referring to Figure 3, on the axial inner walls of the first clamping semi-ring 41 and the second clamping semi-ring 42, two blocking blocks 13 are fixedly arranged at intervals, and a flexible sealing block 14 is fixedly installed on each blocking block 13. A cavity 19 is jointly formed among the first clamping semi-ring 41, the second clamping semi-ring 42, the sleeve 9 and the bottom support pipe 2 (or the top support pipe 1). Grouting holes 15 communicating with the cavity 19 are respectively formed through the locking clamp 43 and the first clamping semi-ring 41, and exhaust holes 16 communicating with the cavity 19 are respectively formed through the locking clamp 43 and the second clamping semi-ring 42.
[0039] Referring to Figure 2 and Figure 3 , after the locking clamp 43 clamps and fixes the first clamping semi-ring 41 and the second clamping semi-ring 42, the operator injects concrete into the cavity 19 through the grouting hole 15, which helps to further improve the connection stability among the first clamping semi-ring 41, the second clamping semi-ring 42, the sleeve 9 and the bottom support pipe 2 (or the top support pipe 1), helps to further improve the connection stability at the connection position between the top support pipe 1 and the bottom support pipe 2, further improves the overall stability and bearing capacity of the concrete-filled steel tube support, and further improves the use safety of the concrete-filled steel tube support.
[0040] The implementation principle of the embodiment of the present application is as follows: During the construction process of the concrete-filled steel tube support, the operator fixedly connects the tops of the two bottom support pipes 2 with the two ends of the top support pipe 1 through the connecting device, and then injects concrete into the bottom support pipe 2 and the top support pipe 1 through the grouting pipe 5. During the injection process of the concrete, the air inside the bottom support pipe 2 and the top support pipe 1 is discharged from the exhaust and slurry discharge holes 6. When the concrete is filled, the excess concrete will be discharged from the exhaust and slurry discharge holes 6, thus completing the construction of the concrete-filled steel tube support.
[0041] When connecting the top support pipe 1 and the bottom support pipe 2, the operator first inserts one end of the connecting pipe 31 into the top support pipe 1 and rotates the connecting pipe 31 to make the connecting pipe 31 threadedly connected with the top support pipe 1, and at the same time makes the axial side wall of the top support pipe 1 abut against the anti-slip gasket 33. The operator then inserts the other end of the connecting pipe 31 into the bottom support pipe 2 and rotates the bottom support pipe 2 to make the connecting pipe 31 threadedly connected with the bottom support pipe 2, and at the same time makes the axial side wall of the bottom support pipe 2 abut against another anti-slip gasket 33. The above operations help to connect the top support pipe 1 and the bottom support pipe 2 together, thus helping to improve the axial and radial bearing capacities at the connection position between the top support pipe 1 and the bottom support pipe 2, and further helping to improve the connection stability at the connection position between the top support pipe 1 and the bottom support pipe 2.
[0042] The operator clamps and fixes the first clamping half-ring 41 and the second clamping half-ring 42 on the outer periphery of the casing 9, and makes the positioning plug 11 inserted into the positioning slot 10. Then, the locking clamp 43 is used to clamp and fix on the outer periphery of the first clamping half-ring 41 and the second clamping half-ring 42, which helps to further improve the radial bearing capacity of the connection position between the top support pipe 1 and the bottom support pipe 2, further improves the connection stability of the connection position between the top support pipe 1 and the bottom support pipe 2, improves the overall stability and bearing capacity of the concrete-filled steel tubular support, and improves the use safety of the concrete-filled steel tubular support.
[0043] After the locking clamp 43 clamps and fixes the first clamping half-ring 41 and the second clamping half-ring 42, the operator injects concrete into the cavity 19 through the grouting hole 15, which helps to further improve the connection stability between the first clamping half-ring 41, the second clamping half-ring 42, the casing 9 and the bottom support pipe 2 (or the top support pipe 1), helps to further improve the connection stability of the connection position between the top support pipe 1 and the bottom support pipe 2, further improves the overall stability and bearing capacity of the concrete-filled steel tubular support, and further improves the use safety of the concrete-filled steel tubular support.
[0044] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.
Claims
1. A concrete-filled steel tubular support, characterized in that: It includes a top support pipe (1), both ends of the top support pipe (1) are connected with bottom support pipes (2), a connecting device is arranged at the connection of the top support pipe (1) and the bottom support pipe (2), the connecting device includes an inner connecting component (3) and an outer connecting component (4), the inner connecting component (3) is arranged inside the top support pipe (1) and the bottom support pipe (2), the outer connecting component (4) is arranged outside the top support pipe (1) and the bottom support pipe (2), a grouting pipe (5) for concrete injection is arranged on each bottom support pipe (2), and an exhaust and slurry discharge hole (6) for air and redundant concrete discharge is arranged at the top end of the top support pipe (1).
2. The concrete-filled steel tubular support according to claim 1, characterized in that: The inner connecting component (3) includes a connecting pipe (31), an abutting ring block (32) and an anti-slip gasket (33). An external thread (7) is arranged on the circumferential outer wall of the connecting pipe (31), an internal thread (8) is arranged on the inner walls of the top support pipe (1) and the bottom support pipe (2). One end of the connecting pipe (31) is inserted into the top support pipe (1) and is threadedly connected with the top support pipe (1), the other end of the connecting pipe (31) is inserted into the bottom support pipe (2) and is threadedly connected with the bottom support pipe (2). The abutting ring block (32) is fixedly sleeved on the connecting pipe (31), and the outer diameters of the top support pipe (1) and the bottom support pipe (2) are the same as the outer diameter of the abutting ring block (32). The anti-slip gasket (33) is arranged on both side walls of the abutting ring block (32).
3. The concrete-filled steel tube support according to claim 2, characterized in that: A sleeve (9) is arranged on the circumferential outer wall of the abutting ring block (32), and the circumferential outer walls of the top support pipe (1) and the bottom support pipe (2) are tightly abutted and fitted with the inner wall of the sleeve (9).
4. The concrete-filled steel tubular support according to claim 3, characterized in that: The outer connecting component (4) includes a first clamping half-ring (41), a second clamping half-ring (42) and a locking clamp (43). The first clamping half-ring (41) and the second clamping half-ring (42) are clamped and fixed and jointly sleeved on the circumferential periphery of the sleeve (9). The axial lengths of the first clamping half-ring (41) and the second clamping half-ring (42) are both greater than the axial length of the sleeve (9). The locking clamp (43) is arranged on the circumferential periphery of the first clamping half-ring (41) and the second clamping half-ring (42).
5. The concrete-filled steel tube support according to claim 4, wherein: A positioning slot (10) is arranged on the circumferential outer wall of the sleeve (9), positioning blocks (11) for inserting into the positioning slot (10) are arranged on the circumferential inner walls of the first clamping half-ring (41) and the second clamping half-ring (42). A positioning block (12) is arranged on the axial inner wall of the locking clamp (43), and the axial side walls of the first clamping half-ring (41) and the second clamping half-ring (42) are abutted against the positioning block (12).
6. The concrete-filled steel tube support according to claim 5, characterized in that: On the axial inner walls of the first clamping semi-ring (41) and the second clamping semi-ring (42), there are both provided with blocking blocks (13), on which flexible sealing blocks (14) are arranged. Through holes (15) are provided through both the locking clamp (43) and the first clamping semi-ring (41), and through holes (16) are provided through both the locking clamp (43) and the second clamping semi-ring (42).
7. A concrete-filled steel tubular support according to claim 1, wherein: On the outer wall of each bottom support pipe (2) at the end far from the top support pipe (1), there are provided a plurality of auxiliary rib plates (17), which are used for supporting the bottom support pipe (2).
8. A concrete-filled steel tubular support according to claim 1, characterized in that: At the end of each bottom support pipe (2) far from the top support pipe (1), there is provided a square steel plug (18), which is used for plugging the pipe orifice at the end of the bottom support pipe (2) far from the top support pipe (1).