Prefabricated steel pipe concrete column spliced with steel and construction technology

Abstract

A prefabricated steel pipe type steel concrete spliced pier column and a construction process, the pier column is divided into a steel end plate-outer bolt connection form, a steel end plate-inner bolt connection form, a steel bar external insertion type splicing form and a steel bar internal insertion type splicing form, when the steel end plate-outer bolt connection form and the steel end plate-inner bolt connection form are adopted, the upper and lower segments are spliced and fixed through the steel end plate and the bolt nut assembly, when the steel bar external insertion type splicing form and the steel bar internal insertion type splicing form are adopted, the upper and lower segments are internally connected through the steel bar and the post-poured concrete, and the external connection is realized through the external steel pipe welding.The scheme in the present application proposes a plurality of node connection structures, which can effectively guarantee the overall performance of the steel pipe type steel concrete spliced pier column, the connection at the node is close, the internal force between the upper and lower pier columns can be well transmitted, local stress is not too concentrated to form a dangerous area, and better bearing capacity, ductility, seismic resistance, fire resistance and corrosion resistance are simultaneously possessed.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering construction, and in particular relates to a prefabricated steel tube steel concrete splicing pier column and a construction process. Background Art

[0002] With the development of modern construction, the number of ultra-deep, ultra-high, and ultra-large span structures is increasing, placing increasing pressure on building load-bearing structures. To meet operational and load-bearing requirements, building load-bearing structures must possess sufficient load-bearing capacity, good seismic ductility, and corrosion resistance. Improving a structure's load-bearing capacity, ductility, and energy dissipation without increasing component cross-sectional dimensions is becoming a growing concern for designers.

[0003] The load-bearing structure of a building has gradually developed from the early primitive concrete structure and steel structure to the current steel and concrete composite structure, among which the steel tubular steel concrete structure is one of the composite structures.

[0004] Steel tube steel concrete structure refers to a new type of composite structure formed by setting steel sections inside steel tubes and filling them with concrete. In this structure, the external steel tubes constrain the internal concrete, so that the concrete is subjected to three-way force instead of unidirectional force, which improves the compressive bearing capacity of the concrete. The internal steel sections increase the shear resistance and seismic ductility of the components. At the same time, the internal concrete prevents local buckling of the thin-walled steel tubes and internal steel sections, thereby increasing the overall stability.

[0005] Therefore, steel tube steel concrete structure has the characteristics of high bearing capacity, small cross-sectional size, strong shear resistance, good seismic ductility and good energy consumption. As a compressive member, steel tube steel concrete has achieved good economic and social benefits.

[0006] With the increasing adoption of environmentally friendly and low-carbon concepts in the construction industry, the advantages of prefabricated structures are becoming increasingly prominent. Prefabricated structures involve systematically designing various building components, breaking them down into modular components, and then prefabricating them in designated factories. These prefabricated components are then transported to the construction site and assembled and installed using reliable connections.

[0007] Prefabricated structures have outstanding production efficiency, the quality of the building components they use is guaranteed, they can save more manpower and material resources on site, and less pollution is caused during construction.

[0008] However, despite the numerous advantages mentioned above, prefabricated buildings also have their inevitable disadvantages: because components are prefabricated in designated factories and then transported to on-site for assembly, this production and use model has a certain impact on the mechanical properties of connection nodes, thereby reducing the structural stiffness, overall performance, and seismic resistance. Therefore, how to overcome the connection issues of prefabricated steel tubular reinforced concrete structures has become a key issue that needs to be addressed. Summary of the Invention

[0009] In response to the problems existing in the prior art, the present invention provides a prefabricated steel tube steel concrete spliced ​​pier column and a construction process, and proposes a variety of node connection structures, which can effectively ensure the overall performance of the steel tube steel concrete spliced ​​pier column. The nodes are tightly connected and can well transmit the internal force between the upper and lower pier columns without causing excessive concentration of local stress to form a dangerous area. At the same time, it has better bearing capacity, ductility, seismic resistance, fire resistance and corrosion resistance.

[0010] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a prefabricated steel tube steel concrete spliced ​​pier column, which adopts the steel end plate-external bolt connection form and is spliced ​​by several segments, and the segments include steel sections, steel tubes, concrete in the column, lower steel end plates and upper steel end plates; the steel tubes are coaxially sleeved on the outside of the steel sections, and the annular gap between the steel tubes and the steel sections is filled with concrete in the column; the lower steel end plates are fixedly welded to the bottom ends of the steel tubes and the steel sections, and the upper steel end plates are fixedly welded to the top ends of the steel tubes and the steel sections; shear connectors are welded on the outer surface of the steel sections and the inner surface of the steel tubes; the upper steel end plates of the bottom segments of the prefabricated steel tube steel concrete spliced ​​pier column are coaxially docked with the lower steel end plates of the top segments, and the upper steel end plates of the bottom segments and the lower steel end plates of the top segments are fixedly connected by bolt and nut assemblies.

[0011] When the steel end plate-external bolt connection form is adopted, the construction process of the prefabricated steel tubular steel concrete spliced ​​pier column includes the following steps:

[0012] Step 1: To make the segment, first prepare the steel section, steel pipe, lower steel end plate and upper steel end plate. The outer surface of the prepared steel section and the inner surface of the steel pipe are pre-welded with shear connectors, and the prepared lower steel end plate and upper steel end plate are pre-machined with bolt connection holes. Then weld the prepared steel section, steel pipe and lower steel end plate together, and then pour the concrete in the column through the upper end of the steel pipe. After the concrete in the column reaches the design strength, complete the welding of the upper steel end plate.

[0013] Step 2: Assemble the segments. First, connect the upper steel end plate of the bottom segment with the lower steel end plate of the top segment, ensuring that the bolt connection holes on the upper steel end plate of the bottom segment are aligned with the bolt connection holes on the lower steel end plate of the top segment. Then, install the bolt and nut assembly in each aligned bolt connection hole until the bottom segment and the top segment are assembled.

[0014] A prefabricated steel tube steel concrete spliced ​​pier column adopts a steel end plate-internal bolt connection form and is spliced ​​together by several segments, the segments including steel sections, steel tubes, concrete inside the column, lower steel end plates and upper steel end plates; the steel tubes are coaxially sleeved on the outside of the steel sections, and the annular gap between the steel tubes and the steel sections is filled with concrete inside the column; the lower steel end plates are fixedly welded to the steel tubes and the bottom ends of the steel sections, and bolt connection reserved holes are provided at the steel tube mouths connected to the lower steel end plates; the upper steel end plates are fixedly welded to the steel tubes and the top ends of the steel sections; shear connectors are welded on the outer surface of the steel sections and the inner surface of the steel tubes; the upper steel end plates of the bottom segments of the prefabricated steel tube steel concrete spliced ​​pier column are coaxially docked with the lower steel end plates of the top segments, and the upper steel end plates of the bottom segments and the lower steel end plates of the top segments are fixedly connected by bolt and nut assemblies.

[0015] The construction process of the prefabricated steel tubular steel concrete spliced ​​pier column adopts the steel end plate-internal bolt connection form, including the following steps:

[0016] Step 1: To make the segment, first prepare the steel section, steel pipe, lower steel end plate and upper steel end plate. The outer surface of the prepared steel section and the inner surface of the steel pipe are pre-welded with shear connectors, and the prepared lower steel end plate and upper steel end plate are pre-machined with bolt connection holes. Then weld the prepared steel section, steel pipe and lower steel end plate together, and then pour the concrete in the column through the upper end of the steel pipe. After the concrete in the column reaches the design strength, complete the welding of the upper steel end plate and pre-embed the bolts in the upper steel end plate.

[0017] Step 2: Assemble the segments. First, connect the upper steel end plate of the bottom segment with the lower steel end plate of the top segment to ensure that the embedded bolts on the upper steel end plate of the bottom segment are accurately inserted into the bolt connection holes on the lower steel end plate of the top segment. Then, put the nuts on the bolts through the bolt connection holes at the steel pipe mouth. Assemble the bottom segment and the top segment together through the bolt and nut assembly. Finally, complete the pouring of post-cast concrete in the bolt connection holes at the steel pipe mouth. The assembly of the bottom segment and the top segment is completed.

[0018] A prefabricated steel pipe steel concrete spliced ​​pier column adopts the steel bar external insertion splicing form, which is spliced ​​by several segments, and the segments include steel, steel pipe, column concrete and embedded steel bars; the steel pipe is coaxially sleeved on the outside of the steel, and the annular gap between the steel pipe and the steel is filled with column concrete; embedded steel bars are provided in the column concrete at both ends of the segment; the steel pipe at the top of the segment protrudes outward relative to the steel, and the steel at the bottom of the segment protrudes outward relative to the steel pipe, and the protruding steel pipe A reserved hole for post-casting of concrete is provided on it; shear connectors are welded on the outer surface of the steel section and the inner surface of the steel pipe; the embedded steel bars at the top end of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier column are butted together with the embedded steel bars at the bottom end of the top segment, and the embedded steel bars at the butting part are encapsulated and fixedly connected by post-cast concrete; the upper end face of the bottom segment steel section of the prefabricated steel tube steel-concrete spliced ​​pier column is glued and fixedly connected with the lower end face of the top segment steel section, and the upper end face of the bottom segment steel pipe is welded and fixedly connected with the lower end face of the top segment steel pipe.

[0019] When the steel bar external insertion splicing form is adopted, the construction process of the prefabricated steel tubular steel concrete splicing pier column includes the following steps:

[0020] Step 1: To make the segment, first prepare the steel section, steel pipe and embedded steel bars. The outer surface of the prepared steel section and the inner surface of the steel pipe are pre-welded with shear connectors, and the prepared steel pipe is pre-machined with reserved holes for concrete pouring. Then, the steel section and the steel pipe are temporarily fixed, and the concrete in the column is poured into the steel pipe. The upper surface of the concrete in the column is flush with the upper end surface of the steel section, and the lower surface of the concrete in the column is between the lower end surface of the steel section and the lower end surface of the steel pipe. During the pouring of the concrete in the column, the embedded steel bars are pre-installed until the concrete in the column reaches the design strength.

[0021] Step 2: Assemble the segments. First, align the bottom segment and the top segment and plug them together. Pre-apply glue between the upper end face of the bottom segment steel section and the lower end face of the top segment steel section to form a bonded connection. The upper end face of the bottom segment steel pipe and the lower end face of the top segment steel pipe are butted and welded to fix. Finally, pour post-cast concrete into the interior of the steel pipe of the convex section through the pre-cast concrete holes on the steel pipe until the post-cast concrete is filled and reaches the design strength. The assembly of the bottom segment and the top segment is completed.

[0022] A prefabricated steel tube steel concrete spliced ​​pier column adopts the steel bar inserted splicing form and is spliced ​​by several segments, the segments including steel tubes, steel splicing tubes, column concrete, embedded steel bars and embedded inner steel bars; the steel tubes are coaxially sleeved on the outside of the steel splicing tubes, the annular gap between the steel tubes and the steel splicing tubes and the interior of the steel splicing tubes are filled with column concrete, both ends of the column concrete in the annular gap between the steel tubes and the steel splicing tubes are provided with embedded steel bars, and both ends of the column concrete inside the steel splicing tubes are provided with embedded inner steel bars; the steel splicing tubes at both ends of the segment protrude outward relative to the steel tubes; the steel splicing tubes of the bottom segment of the prefabricated steel tube steel concrete splicing pier column are set as outer steel splicing tubes, the steel splicing tubes of the top segment are set as inner steel splicing tubes, and the gap between the outer steel splicing tubes and the inner steel splicing tubes is spliced Matching; concrete post-pouring reserved holes are provided at the pipe openings at both ends of the steel pipe, the pipe opening at the top end of the outer steel plug-in pipe, and the pipe opening at the bottom end of the inner steel plug-in pipe; shear connectors are welded on the inner surface of the steel pipe, the outer surface of the inner steel plug-in pipe, and the outer surface of the outer steel plug-in pipe; the embedded steel bars at the top end of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier are butt-jointed with the embedded steel bars at the bottom end of the top segment, and the embedded steel bars at the butt-jointed part are encapsulated and fixed by post-pouring concrete; the embedded internal steel bars at the top end of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier are butt-jointed with the embedded internal steel bars at the bottom end of the top segment, and the embedded internal steel bars at the butt-jointed part are also encapsulated and fixed by post-pouring concrete; the upper end face of the steel pipe of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier is welded and fixedly connected with the lower end face of the steel pipe of the top segment.

[0023] When the reinforcement internal insertion type splicing is adopted, the construction process of the prefabricated steel tubular steel concrete splicing pier column includes the following steps:

[0024] Step 1: To make the segment, first prepare the steel pipe, steel spigot, embedded steel bars and embedded inner steel bars. The inner surface of the prepared steel pipe and the outer surface of the steel spigot are pre-welded with shear connectors, and the prepared steel pipe and steel spigot are pre-machined with holes reserved for post-casting of concrete. Then, temporarily fix the steel pipe and the steel spigot, and then pour the concrete in the column into the steel pipe and the steel spigot. The upper surface of the concrete in the column is lower than the upper end face of the steel pipe, and the lower surface of the concrete in the column is lower than the lower end face of the steel pipe. During the pouring of the concrete in the column, the embedded steel bars and the embedded inner steel bars are pre-installed until the concrete in the column reaches the design strength.

[0025] Step 2: Assemble the segments. First, align the bottom segment and the top segment and plug them together. After the inner steel plug-in tube and the outer steel plug-in tube are plugged together, the pre-cast concrete holes on them are kept aligned and connected. The upper end face of the bottom segment steel pipe and the lower end face of the top segment steel pipe are connected and then welded and fixed. Finally, pour the post-cast concrete into the inside of the steel pipe through the pre-cast concrete holes on the steel pipe until the post-cast concrete is filled and reaches the design strength. The assembly of the bottom segment and the top segment is completed.

[0026] Beneficial effects of the present invention:

[0027] The prefabricated steel tube steel concrete spliced ​​pier column and construction process of the present invention proposes a variety of node connection structures, which can effectively ensure the overall performance of the steel tube steel concrete spliced ​​pier column. The nodes are tightly connected and can well transmit the internal force between the upper and lower pier columns without causing excessive concentration of local stress to form a dangerous area. At the same time, it has better bearing capacity, ductility, seismic resistance, fire resistance and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (adopting a steel end plate-external bolt connection form) of the present invention (after assembly);

[0029] Figure 2 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (adopting a steel end plate-external bolt connection form) of the present invention (before assembly);

[0030] Figure 3 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (adopting a steel end plate-internal bolt connection form) of the present invention (after assembly);

[0031] Figure 4 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (adopting a steel end plate-internal bolt connection form) of the present invention (before assembly);

[0032] Figure 5 for Figure 2 II cross-sectional view (wherein, Figure 5 a is a combination of square steel tube and I-beam. Figure 5 b is a combination of square steel tube and field steel section. Figure 5 c is a combination of square steel pipe and round steel pipe. Figure 5 d is a combination of round steel tube and I-beam. Figure 5 e is a combination of round steel tube and field steel section. Figure 5 f is a combination of round steel pipe and round steel section);

[0033] Figure 6 for Figure 2 II-II cross-sectional view (wherein, Figure 6 a is a combination of square steel tube and I-beam. Figure 6 b is a combination of square steel tube and field steel section. Figure 6 c is a combination of square steel pipe and round steel pipe. Figure 6 d is a combination of round steel tube and I-beam. Figure 6 e is a combination of round steel tube and field steel section. Figure 6 f is a combination of round steel pipe and round steel section);

[0034] Figure 7 for Figure 4 Section III-III (wherein Figure 7 a is a combination of square steel tube and I-beam. Figure 7 b is a combination of square steel tube and field steel section. Figure 7 c is a combination of square steel pipe and round steel pipe. Figure 7 d is a combination of round steel tube and I-beam. Figure 7 e is a combination of round steel tube and field steel section. Figure 7 f is a combination of round steel pipe and round steel section);

[0035] Figure 8 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (reinforcement externally inserted splicing form) of the present invention (after assembly);

[0036] Figure 9 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (reinforcement external insertion splicing form) of the present invention (before assembly);

[0037] Figure 10 for Figure 9 Section IV-IV (wherein Figure 10 a is a combination of square steel tube and I-beam. Figure 10 b is a combination of square steel tube and field steel section. Figure 10 c is a combination of square steel pipe and round steel pipe. Figure 10 d is a combination of round steel tube and I-beam. Figure 10 e is a combination of round steel tube and field steel section. Figure 10 f is a combination of round steel pipe and round steel section);

[0038] Figure 11 for Figure 9 Middle VV cross-section (wherein, Figure 11 a is a combination of square steel tube and I-beam. Figure 11 b is a combination of square steel tube and field steel section. Figure 11 c is a combination of square steel pipe and round steel pipe. Figure 11 d is a combination of round steel tube and I-beam. Figure 11 e is a combination of round steel tube and field steel section. Figure 11 f is a combination of round steel pipe and round steel section);

[0039] Figure 12 for Figure 9 VI-VI cross-sectional view (wherein, Figure 12 a is a combination of square steel tube and I-beam. Figure 12 b is a combination of square steel tube and field steel section. Figure 12c is a combination of square steel pipe and round steel pipe. Figure 12 d is a combination of round steel tube and I-beam. Figure 12 e is a combination of round steel tube and field steel section. Figure 12 f is a combination of round steel pipe and round steel section);

[0040] Figure 13 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (reinforcement internal insertion splicing form) of the present invention (after assembly);

[0041] Figure 14 This is a structural diagram of the prefabricated steel tubular steel concrete spliced ​​pier column (reinforcement internal insertion splicing form) of the present invention (before assembly);

[0042] Figure 15 for Figure 14 Section VII-VII (wherein, Figure 15 a is a combination of square steel pipe and round steel plug-in pipe, Figure 15 b is a combination of a round steel pipe and a round steel spigot pipe);

[0043] Figure 16 for Figure 14 Section VIII-VIII (wherein, Figure 16 a is a combination of square steel pipe and round steel plug-in pipe, Figure 16 b is a combination of a round steel pipe and a round steel spigot pipe);

[0044] Figure 17 for Figure 14 Section IX-IX (wherein, Figure 17 a is a combination of square steel pipe and round steel plug-in pipe, Figure 17 b is a combination of a round steel pipe and a round steel spigot pipe);

[0045] Figure 18 for Figure 14 XX cross-section (wherein, Figure 18 a is a combination of square steel pipe and round steel plug-in pipe, Figure 18 b is a combination of a round steel pipe and a round steel spigot pipe);

[0046] In the figure, 1 is the bottom segment, 2 is the top segment, 3 is the bolt and nut assembly, 4 is the steel section, 5 is the steel pipe, 6 is the concrete in the column, 7 is the lower steel end plate, 8 is the upper steel end plate, 9 is the shear connector, 10 is the post-poured concrete, 11 is the embedded steel bar, 12 is the inner steel plug-in pipe, 13 is the outer steel plug-in pipe, and 14 is the embedded inner steel bar. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figure 1 、 2 As shown in Figures 5 and 6, a prefabricated steel tube steel concrete spliced ​​pier column adopts a steel end plate-external bolt connection form and is spliced ​​by several segments, the segments including steel section 4, steel tube 5, column inner concrete 6, lower steel end plate 7 and upper steel end plate 8; the steel tube 5 is coaxially sleeved on the outside of the steel section 4, and the annular gap between the steel tube 5 and the steel section 4 is filled with column inner concrete 6; the lower steel end plate 7 is fixedly welded to the steel tube 5 and the bottom end of the steel section 4, and the upper steel end plate 8 is fixedly welded to the steel tube 5 and the top end of the steel section 4; shear connectors 9 are welded to the outer surface of the steel section 4 and the inner surface of the steel tube 5; the upper steel end plate 8 of the bottom segment 1 of the prefabricated steel tube steel concrete spliced ​​pier column is coaxially docked with the lower steel end plate 7 of the top segment 2, and the upper steel end plate 8 of the bottom segment 1 and the lower steel end plate 7 of the top segment 2 are fixedly connected by a bolt and nut assembly 3.

[0049] When the steel end plate-external bolt connection form is adopted, the construction process of the prefabricated steel tubular steel concrete spliced ​​pier column includes the following steps:

[0050] Step 1: Make the segment. First, prepare the steel section 4, steel tube 5, lower steel end plate 7 and upper steel end plate 8. The outer surface of the prepared steel section 4 and the inner surface of the steel tube 5 are pre-welded with shear connectors 9, and the prepared lower steel end plate 7 and upper steel end plate 8 are pre-machined with bolt connection holes. Then weld the prepared steel section 4, steel tube 5 and lower steel end plate 7 together, and then pour the concrete 6 in the column through the upper end of the steel tube 5. After the concrete 6 in the column reaches the design strength, complete the welding of the upper steel end plate 8.

[0051] Step 2: Assemble the segments. First, connect the upper steel end plate 8 of the bottom segment 1 with the lower steel end plate 7 of the top segment 2, ensuring that the bolt connection holes on the upper steel end plate 8 of the bottom segment 1 are aligned with the bolt connection holes on the lower steel end plate 7 of the top segment 2. Then, install the bolt and nut assembly 3 in each aligned bolt connection hole until the assembly of the bottom segment 1 and the top segment 2 is completed.

[0052] like Figure 3 、 4As shown in , 7, a prefabricated steel tube steel concrete spliced ​​pier column adopts the steel end plate-internal bolt connection form and is spliced ​​by several segments, the segments including steel section 4, steel tube 5, column inner concrete 6, lower steel end plate 7 and upper steel end plate 8; the steel tube 5 is coaxially sleeved on the outside of the steel section 4, and the annular gap between the steel tube 5 and the steel section 4 is filled with column inner concrete 6; the lower steel end plate 7 is fixedly welded to the steel tube 5 and the bottom end of the steel section 4, and a bolt connection reserved hole is provided at the pipe mouth of the steel tube 5 connected to the lower steel end plate 7; the upper steel end plate 8 is fixedly welded to the steel tube 5 and the top end of the steel section 4; shear connectors 9 are welded on the outer surface of the steel section 4 and the inner surface of the steel tube 5; the upper steel end plate 8 of the bottom segment 1 of the prefabricated steel tube steel concrete spliced ​​pier column is coaxially docked with the lower steel end plate 7 of the top segment 2, and the upper steel end plate 8 of the bottom segment 1 and the lower steel end plate 7 of the top segment 2 are fixedly connected by a bolt and nut assembly 3.

[0053] The construction process of the prefabricated steel tubular steel concrete spliced ​​pier column adopts the steel end plate-internal bolt connection form, including the following steps:

[0054] Step 1: Make the segment. First, prepare the steel section 4, steel pipe 5, lower steel end plate 7 and upper steel end plate 8. The outer surface of the prepared steel section 4 and the inner surface of the steel pipe 5 are pre-welded with shear connectors 9, and the prepared lower steel end plate 7 and upper steel end plate 8 are pre-machined with bolt connection holes; then weld the prepared steel section 4, steel pipe 5 and lower steel end plate 7 together, and then pour the concrete 6 in the column through the upper end of the steel pipe 5. After the concrete 6 in the column reaches the design strength, complete the welding of the upper steel end plate 8 and pre-embed the bolts on the upper steel end plate 8;

[0055] Step 2: Assemble the segments. First, connect the upper steel end plate 8 of the bottom segment 1 with the lower steel end plate 7 of the top segment 2 to ensure that the embedded bolts on the upper steel end plate 8 of the bottom segment 1 are accurately inserted into the bolt connection holes on the lower steel end plate 7 of the top segment 2. Then, put the nuts on the bolts through the bolt connection holes at the pipe mouth of the steel pipe 5, and assemble the bottom segment 1 and the top segment 2 together through the bolt and nut assembly 3. Finally, complete the pouring of post-cast concrete 10 in the bolt connection holes at the pipe mouth of the steel pipe 5, and the assembly of the bottom segment 1 and the top segment 2 is completed.

[0056] like Figures 8-12As shown, a prefabricated steel pipe type steel concrete spliced pier column adopts a steel bar outer insertion type splicing form and is spliced by several segments, the segments including a type steel 4, a steel pipe 5, column inner concrete 6 and a pre-embedded steel bar 11; the steel pipe 5 is coaxially sleeved outside the type steel 4, and the annular gap between the steel pipe 5 and the type steel 4 is filled by the column inner concrete 6; the pre-embedded steel bar 11 is arranged in the column inner concrete 6 at both ends of the segment; the steel pipe 5 at the top end of the segment protrudes outward relative to the type steel 4, the type steel 4 at the bottom end of the segment protrudes outward relative to the steel pipe 5, and a concrete post-poured reserved hole is arranged on the protruding steel pipe 5; the shear connectors 9 are welded on the outer surface of the type steel 4 and the inner surface of the steel pipe 5; the pre-embedded steel bars 11 at the top end of the bottom segment 1 and the bottom end of the top segment 2 are butted together, and the pre-embedded steel bars 11 at the butted part are encapsulated and fixedly connected by the post-poured concrete 10; the upper end surface of the type steel 4 of the bottom segment 1 and the lower end surface of the type steel 4 of the top segment 2 are cemented and fixedly connected, and the upper end surface of the steel pipe 5 of the bottom segment 1 and the lower end surface of the steel pipe 5 of the top segment 2 are welded and fixedly connected.

[0057] When the steel bar outer insertion type splicing form is adopted, the construction process of the prefabricated steel pipe type steel concrete spliced pier column includes the following steps:

[0058] Step one: segment preparation, first, the type steel 4, the steel pipe 5 and the pre-embedded steel bar 11 are prepared, the outer surface of the prepared type steel 4 and the inner surface of the prepared steel pipe 5 are pre-welded with shear connectors 9, and the prepared steel pipe 5 is pre-processed with a concrete post-poured reserved hole; then, the type steel 4 and the steel pipe 5 are temporarily fixed, the column inner concrete 6 is poured into the steel pipe 5, the upper surface of the column inner concrete 6 is flush with the upper end surface of the type steel 4, the lower surface of the column inner concrete 6 is between the lower end surface of the type steel 4 and the lower end surface of the steel pipe 5, and the pre-embedded steel bar 11 is pre-assembled during the pouring of the column inner concrete 6 until the column inner concrete 6 reaches the design strength;

[0059] Step two: segment assembly, first, the bottom segment 1 and the top segment 2 are aligned and inserted together, the upper end surface of the type steel 4 of the bottom segment 1 and the lower end surface of the type steel 4 of the top segment 2 are pre-coated with glue to form cemented and fixed connection, and the upper end surface of the steel pipe 5 of the bottom segment 1 and the lower end surface of the steel pipe 5 of the top segment 2 are butted and then welded and fixed; finally, the post-poured concrete 10 is poured into the outer protruding steel pipe 5 through the concrete post-poured reserved hole on the steel pipe 5 until the post-poured concrete 10 is filled and reaches the design strength, and the bottom segment 1 and the top segment 2 are assembled.

[0060] As Figures 13-18As shown, a prefabricated steel tube steel concrete spliced ​​pier column adopts the steel bar inserted splicing form and is spliced ​​by several segments, the segments including steel tube 5, steel splicing tube, column concrete 6, embedded steel bars 11 and embedded inner steel bars 14; the steel tube 5 is coaxially sleeved on the outside of the steel splicing tube, the annular gap between the steel tube 5 and the steel splicing tube and the interior of the steel splicing tube 13 are filled with column concrete 6, both ends of the column concrete 6 in the annular gap between the steel tube 5 and the steel splicing tube are provided with embedded steel bars 11, and both ends of the column concrete 6 inside the steel splicing tube are provided with embedded inner steel bars 14; the steel splicing tubes at both ends of the segment protrude outward relative to the steel tube 5; the steel splicing tube of the bottom segment 1 of the prefabricated steel tube steel concrete splicing pier column is set as an outer steel splicing tube 13, and the steel splicing tube of the top segment 2 is set as an inner steel splicing tube 12, and the outer steel splicing tube 13 and the inner steel splicing tube 12 are spliced ​​together in a gap. ; Pre-cast concrete holes are provided at the pipe ends of the steel pipe 5, the top pipe end of the outer steel plug pipe 13, and the bottom pipe end of the inner steel plug pipe 12; shear connectors 9 are welded on the inner surface of the steel pipe 5, the outer surface of the inner steel plug pipe 12, and the outer surface of the outer steel plug pipe 13; the embedded steel bars 11 at the top of the bottom segment 1 of the prefabricated steel tube steel concrete splicing pier are butt-jointed with the embedded steel bars 11 at the bottom end of the top segment 2, and the embedded steel bars 11 at the butt-jointed part are encapsulated and fixedly connected by post-cast concrete 10; the embedded internal steel bars 14 at the top of the bottom segment 1 of the prefabricated steel tube steel concrete splicing pier are butt-jointed with the embedded internal steel bars 14 at the bottom end of the top segment 2, and the embedded internal steel bars 14 at the butt-jointed part are also encapsulated and fixedly connected by post-cast concrete 10; the upper end face of the steel pipe 5 of the bottom segment 1 of the prefabricated steel tube steel concrete splicing pier is welded and fixedly connected with the lower end face of the steel pipe 5 of the top segment 2.

[0061] When the reinforcement internal insertion type splicing is adopted, the construction process of the prefabricated steel tubular steel concrete splicing pier column includes the following steps:

[0062] Step 1: To make a segment, first prepare the steel pipe 5, the steel spigot pipe, the embedded steel bars 11 and the embedded inner steel bars 14. The inner surface of the prepared steel pipe 5 and the outer surface of the steel spigot pipe are pre-welded with shear connectors 9, and the prepared steel pipe 5 and the steel spigot pipe are pre-machined with holes reserved for post-pouring of concrete. Then, temporarily fix the steel pipe 5 and the steel spigot pipe, and then pour the column concrete 6 into the steel pipe 5 and the steel spigot pipe. The upper surface of the column concrete 6 is lower than the upper end face of the steel pipe 5, and the lower surface of the column concrete 6 is lower than the lower end face of the steel pipe 5. During the pouring process of the column concrete 6, the embedded steel bars 11 and the embedded inner steel bars 14 are pre-installed until the column concrete 6 reaches the design strength.

[0063] Step 2: Assemble the segments. First, align the bottom segment 1 and the top segment 2 and plug them together. After the inner steel plug-in tube 12 and the outer steel plug-in tube 13 are plugged together, the pre-cast concrete holes on them are kept aligned and connected. The upper end face of the steel pipe 5 of the bottom segment 1 and the lower end face of the steel pipe 5 of the top segment 2 are connected and then welded and fixed. Finally, pour the post-cast concrete 10 into the interior of the steel pipe 5 through the pre-cast concrete holes on the steel pipe 5 until the post-cast concrete 10 is filled and reaches the design strength. The assembly of the bottom segment 1 and the top segment 2 is completed.

[0064] The solutions in the embodiments are not intended to limit the patent protection scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention is included in the patent scope of this case.

Claims

1. A prefabricated steel tubular steel concrete spliced ​​pier column, characterized by: The steel bar internal insertion splicing form is adopted, and it is spliced ​​by several segments, and the segments include steel pipes, steel splicing tubes, column concrete, embedded steel bars and embedded inner steel bars; the steel pipes are coaxially sleeved on the outside of the steel splicing tubes, and the annular gap between the steel pipes and the steel splicing tubes and the interior of the steel splicing tubes are filled with column concrete, and both ends of the column concrete in the annular gap between the steel pipes and the steel splicing tubes are provided with embedded steel bars, and both ends of the column concrete inside the steel splicing tubes are provided with embedded inner steel bars; the steel splicing tubes at both ends of the segment protrude outward relative to the steel pipes; the steel splicing tubes of the bottom segment of the prefabricated steel pipe steel concrete splicing pier are set as outer steel splicing tubes, and the steel splicing tubes of the top segment are set as inner steel splicing tubes, and the outer steel splicing tubes and the inner steel splicing tubes are spliced ​​together in the gap; in the steel pipe Concrete post-pouring reserved holes are provided at the pipe openings at both ends, the top pipe opening of the outer steel plug-in pipe, and the bottom pipe opening of the inner steel plug-in pipe; shear connectors are welded on the inner surface of the steel pipe, the outer surface of the inner steel plug-in pipe, and the outer surface of the outer steel plug-in pipe; the embedded steel bars at the top end of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier column are butt-jointed with the embedded steel bars at the bottom end of the top segment, and the embedded steel bars at the butt-jointed part are encapsulated and fixedly connected by post-pouring concrete; the embedded internal steel bars at the top end of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier column are butt-jointed with the embedded internal steel bars at the bottom end of the top segment, and the embedded internal steel bars at the butt-jointed part are also encapsulated and fixedly connected by post-pouring concrete; the upper end face of the steel pipe of the bottom segment of the prefabricated steel tube steel-concrete spliced ​​pier column is welded and fixedly connected with the lower end face of the steel pipe of the top segment.

2. The construction process of the prefabricated steel tubular steel concrete splicing pier column according to claim 1, wherein the steel bar internal insertion splicing is adopted, characterized in that The steps include: Step 1: To make the segment, first prepare the steel pipe, steel spigot, embedded steel bars and embedded inner steel bars. The inner surface of the prepared steel pipe and the outer surface of the steel spigot are pre-welded with shear connectors, and the prepared steel pipe and steel spigot are pre-machined with holes reserved for post-casting of concrete. Then, temporarily fix the steel pipe and the steel spigot, and then pour the concrete in the column into the steel pipe and the steel spigot. The upper surface of the concrete in the column is lower than the upper end face of the steel pipe, and the lower surface of the concrete in the column is lower than the lower end face of the steel pipe. During the pouring of the concrete in the column, the embedded steel bars and the embedded inner steel bars are pre-installed until the concrete in the column reaches the design strength. Step 2: Assemble the segments. First, align the bottom segment and the top segment and plug them together. After the inner steel plug-in tube and the outer steel plug-in tube are plugged together, the pre-cast concrete holes on them are kept aligned and connected. The upper end face of the bottom segment steel pipe and the lower end face of the top segment steel pipe are connected and then welded and fixed. Finally, pour the post-cast concrete into the inside of the steel pipe through the pre-cast concrete holes on the steel pipe until the post-cast concrete is filled and reaches the design strength. The assembly of the bottom segment and the top segment is completed.

Images