CN114134803A - Assembled thin-walled steel tube concrete pier system and construction process thereof - Google Patents
Assembled thin-walled steel tube concrete pier system and construction process thereof Download PDFInfo
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- CN114134803A CN114134803A CN202111130910.8A CN202111130910A CN114134803A CN 114134803 A CN114134803 A CN 114134803A CN 202111130910 A CN202111130910 A CN 202111130910A CN 114134803 A CN114134803 A CN 114134803A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 214
- 239000010959 steel Substances 0.000 title claims abstract description 214
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004873 anchoring Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 210000000265 leukocyte Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
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Abstract
The invention discloses an assembled thin-wall concrete-filled steel tube pier system and a construction process thereof. A plurality of anchoring steel bars I and positioning screw I are pre-buried on the bearing platform upper surface, and the concrete filled steel tubular column upper end has the hollow section, and lower extreme welding position end plate, a plurality of constant head tanks I on the positioning end plate cooperate with positioning screw I. The lower end of the steel tube concrete column is sleeved with column base outer wrapping steel, and the column base outer wrapping steel is filled with concrete. A plurality of anchoring steel bars II and positioning screws II are pre-buried on the lower surface of the prefabricated bent cap, and the prefabricated bent cap is provided with a plurality of reserved through holes. The upper end of the steel pipe concrete column is connected with a positioning outer ring plate, a plurality of positioning grooves II on the positioning outer ring plate are matched with positioning screws II, anchoring reinforcing steel bars II are inserted into the hollow sections, and concrete is integrally cast into the hollow sections of the reserved through holes and the steel pipes. The invention improves the assembly rate of the bridge pier, can realize high-quality production of a factory and rapid construction on site, and reduces the use of wet operation and templates on site.
Description
Technical Field
The invention relates to the technical field of bridge structures, in particular to an assembled thin-wall concrete-filled steel tube pier system and a construction process thereof.
Background
The steel-concrete combined bridge pier has the advantages of small section, high bearing capacity, excellent earthquake resistance, good ductility and the like. The steel tube concrete bridge pier is used as a main steel-concrete combined bridge pier form, the steel tube part of the steel tube concrete bridge pier provides lateral restraint for concrete in a core area, the bearing capacity of the concrete is improved, the concrete part provides lateral support for the steel tube, local buckling of the steel tube is avoided, the performance characteristics of two materials can be fully utilized, and the steel tube concrete bridge pier has a wide application prospect.
With the vigorous national implementation of factory production and assembly construction, the assembly type steel-concrete combined pier is widely applied in recent years, but in practical engineering, some problems to be solved still exist:
(1) traditional steel pipe concrete pier is connected comparatively difficultly with the basis: the common embedded column base needs to embed a steel pipe into a foundation and pour in situ, so that the reinforcement arrangement of the foundation is influenced, and the assembly rate is not high; the common end-bearing column base has high construction precision requirement, and the steel consumption and welding quantity of the end plate and the stiffening rib are increased.
(2) A large amount of field wet operations still exist in the construction of the traditional steel pipe concrete pier, and a high-altitude formwork is needed for the capping beam and the tie beam of the high pier, so that the construction period is not shortened, and the production quality is not improved.
Therefore, it is necessary to develop an assembly type steel-concrete composite pier which can solve the above problems.
Disclosure of Invention
The invention aims to provide an assembled thin-wall concrete-filled steel tube pier system and a construction process thereof, and aims to solve the problems in the prior art.
The technical scheme adopted for achieving the purpose of the invention is that the fabricated thin-walled steel tube concrete pier system comprises a bearing platform, a steel tube concrete column, column base externally-coated steel, concrete poured behind a column base connecting area, a prefabricated cover beam and concrete poured behind a column top connecting area.
Be equipped with a plurality of groups of embedded steel bar I and a plurality of groups of embedded screw I on the cushion cap, every group of embedded steel bar I all is equipped with a set of embedded screw I including a plurality of anchor steel bar I that enclose into the circle in every group of embedded steel bar I, and every group of embedded screw I is including a plurality of positioning screw I that enclose into the circle, and anchor steel bar I and positioning screw I all stretch out the cushion cap upper surface.
The concrete-filled steel tube column comprises a steel tube and a concrete column positioned in the steel tube, the lower end of the concrete column is flush with the lower end of the steel tube, the upper end of the concrete column is positioned below the upper end of the steel tube, and the upper section of the steel tube is provided with a hollow section with the length of h.
The lower extreme welding of steel core concrete column has location end plate, is provided with a plurality of constant head tanks I on the location end plate, and a plurality of constant head tanks I on the location end plate are corresponding with a plurality of positioning screw I in a set of pre-buried screw I respectively.
And the lower ends of the steel pipe concrete columns are respectively inserted into the groups of embedded steel bars I, and the positioning screws I penetrate through the corresponding positioning grooves I and are screwed into the nuts.
The lower end of each steel tube concrete column is sleeved with column base outer steel, the lower end of the column base outer steel is in contact with the upper surface of the bearing platform, and concrete is poured after a column base connecting area is filled between the steel tube concrete column and the column base outer steel.
Be provided with a plurality of groups of embedded steel bar II, a plurality of groups of embedded screw II and a plurality of reservation through-holes on the prefabricated bent cap, every group of embedded screw II is including a plurality of positioning screw II that enclose into the circle, all is equipped with a set of embedded steel bar II in every group of embedded screw II, and every group of embedded steel bar II is including a plurality of anchor reinforcing bars II that enclose into the circle, all is equipped with a reservation through-hole in every group of embedded steel bar II, reserves the upper and lower surface that the through-hole runs through prefabricated bent cap, and anchor reinforcing bar II and positioning screw II all stretch out prefabricated bent cap lower surface.
The upper end of each concrete filled steel tube column is connected with a positioning outer ring plate, the inner diameter of the positioning outer ring plate is consistent with the inner diameter of the steel tube, and the outer diameter of the positioning outer ring plate is larger than the outer diameter of the steel tube. And a plurality of positioning grooves II are formed in the positioning outer ring plate, and the positioning grooves II in one positioning outer ring plate correspond to a plurality of positioning screws II in a group of embedded screws II respectively.
The exposed ends of the embedded steel bars II of a plurality of groups are respectively inserted into the hollow sections of the steel pipes, the reserved through holes are overlapped with the axes of the steel pipes, and each positioning screw rod II penetrates through the corresponding positioning groove II and is screwed into the nut.
And pouring concrete into the column top connection area and pouring concrete into the hollow section of the reserved through hole and the steel pipe.
Furthermore, a plurality of column bottom shear connectors are arranged on the outer wall of the steel tube concrete column close to the lower end, and the column bottom shear connectors are located in concrete poured behind the column base connection area.
Furthermore, a plurality of column top shear connectors are arranged on the inner wall of the hollow section of the steel pipe and are positioned in the concrete poured behind the column top connection area.
The construction process of the assembled thin-walled steel tube concrete pier system comprises the following steps:
1) and pouring a plurality of the steel pipe concrete columns.
2) And covering a steel sleeve outside the column base on the steel tube concrete column.
3) The lower end of the steel tube concrete column is positioned and installed through a plurality of positioning screws I and a plurality of positioning grooves I, and nuts are screwed into the positioning screws I. And a plurality of anchoring steel bars I are inserted into a gap between the column base outer clad steel and the steel tube concrete column.
4) And pouring concrete into the column base connection area after the column base is poured into the column base outer-wrapping steel.
5) After the post-cast concrete of the column base connection area reaches the specified strength, the prefabricated bent cap is installed in a positioning mode through a plurality of positioning screw rods II and a plurality of positioning grooves II, and nuts are screwed into the positioning screw rods II. And a plurality of anchoring steel bars II are inserted into the hollow section at the upper end of the concrete-filled steel tubular column.
6) And pouring concrete after the column top connecting area is poured through the reserved through holes.
Further, the concrete-filled steel tubular column in the step 1) is prefabricated and poured in a factory or poured in situ.
The invention has the beneficial effects that:
1. on the premise of ensuring the connection performance between the column base and the bearing platform, the connection between the column base and the bearing platform becomes more convenient, the arrangement of ribs on the bearing platform is not influenced by the column base, and the steel consumption and the welding workload are reduced;
2. the construction process of the traditional concrete-filled steel tube bridge pier is improved, the assembly rate of the bridge pier is improved, high-quality production of a factory and rapid construction on site can be realized, and the site wet operation and the use of templates are reduced;
3. the outer steel and the concrete poured between the outer steel and the steel pipe concrete can form an anti-collision structure of the pier.
Drawings
FIG. 1 is a schematic view of the pier system of the present invention as a single column;
FIG. 2 is a schematic view of a platform;
FIG. 3 is a schematic view of a concrete filled steel tubular column;
FIG. 4 is a schematic view of positioning the outer ring plate;
FIG. 5 is a schematic view of positioning an end plate;
FIG. 6 is a schematic view of a precast capping beam;
fig. 7 is a schematic view of the pier system of the present invention being a dual column.
In the figure: the concrete column comprises a bearing platform 1, an anchoring steel bar I101, a positioning screw I102, a steel pipe concrete column 2, a steel pipe 201, a concrete column 202, a positioning end plate 203, a positioning groove I2031, a positioning outer ring plate 204, a positioning groove II 2041, a column bottom shear connector 205, a column top shear connector 206, column foot outer wrapping steel 3, column foot connection area rear pouring concrete 4, a prefabricated cover beam 5, an anchoring steel bar II 501, a positioning screw II 502, a reserved through hole 503 and column top connection area rear pouring concrete 6.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses an assembled thin-walled steel tube concrete pier system, which comprises a bearing platform 1, a steel tube concrete column 2, column base outer wrapping steel 3, column base connection area rear pouring concrete 4, a prefabricated capping beam 5 and column top connection area rear pouring concrete 6. This embodiment is a single column pier system.
Referring to fig. 2, be equipped with a set of embedded steel bar I and a set of embedded screw I on cushion cap 1, a set of embedded steel bar I is equipped with a set of embedded screw I including the I101 of many anchor bars that enclose into the circle in a set of embedded steel bar I, a set of embedded screw I is including the I102 of many positioning screw that enclose into the circle, anchor bar I101 and positioning screw I102 all stretch out the 1 upper surface of cushion cap.
Referring to fig. 3, the concrete filled steel tube column 2 comprises a steel tube 201 and a concrete column 202 located in the steel tube 201, wherein the lower end of the concrete column 202 is flush with the lower end of the steel tube 201, the upper end of the concrete column 202 is located below the upper end of the steel tube 201, and the upper section of the steel tube 201 has a hollow section with a length h.
The welding of the lower extreme of steel core concrete column 2 has location end plate 203, see fig. 5, is provided with a plurality of constant head tanks I2031 on the location end plate 203, and a plurality of constant head tanks I2031 on a location end plate 203 are corresponding with many positioning screw I102 in a set of embedded screw I respectively, and a plurality of constant head tanks I2031 are a plurality of U-shaped breach of evenly distributed at circular shape location end plate 203 edge. In this embodiment, when the concrete filled steel tubular column 2 is poured without a back cover, the positioning end plate 203 may also be in a circular ring shape.
The lower end of the steel pipe concrete column 2 is inserted into a group of embedded steel bars I, and the positioning screw I102 penetrates through the corresponding positioning groove I2031 and is screwed into the nut.
Referring to fig. 1, the lower end of the steel tube concrete column 2 is sleeved with column base outer steel 3, the lower end of the column base outer steel 3 is in contact with the upper surface of the bearing platform 1, and concrete 4 is poured after a column base connecting area is filled between the steel tube concrete column 2 and the column base outer steel 3. In this embodiment, the inner wall of the column shoe outer cladding steel 3 is provided with a plurality of shear connectors which are close to the lower end of the column shoe outer cladding steel 3.
Referring to fig. 6, be provided with a set of embedded steel bar II, a set of embedded screw II and a reservation through-hole 503 on prefabricated bent cap 5, a set of embedded screw II is including enclosing many positioning screw II 502 of circle, be equipped with a set of embedded steel bar II in a set of embedded screw II, a set of embedded steel bar II is including enclosing many anchor reinforcing bars II 501 of circle, be equipped with a reservation through-hole 503 in a set of embedded steel bar II, reservation through-hole 503 runs through prefabricated bent cap 5's upper and lower surface, anchor reinforcing bar II 501 and positioning screw II 502 all stretch out prefabricated bent cap 5 lower surface.
Referring to fig. 3, the upper end of the concrete filled steel tubular column 2 is connected with a positioning outer ring plate 204, the inner diameter of the positioning outer ring plate 204 is consistent with the inner diameter of the steel tube 201, and the outer diameter of the positioning outer ring plate 204 is larger than the outer diameter of the steel tube 201. Referring to fig. 4, a plurality of positioning grooves ii 2041 are formed in the outer positioning ring plate 204, the positioning grooves ii 2041 in the outer positioning ring plate 204 correspond to a plurality of positioning screws ii 502 in a group of embedded screws ii, respectively, and the positioning grooves ii 2041 are a plurality of U-shaped notches uniformly distributed on the edge of the circular outer positioning ring plate 204.
The exposed ends of the embedded steel bars II are inserted into the hollow section of the steel pipe 201, the reserved through holes 503 are overlapped with the axis of the steel pipe 201, and the positioning screws II 502 penetrate through the corresponding positioning grooves II 2041 and are screwed into the nuts.
Referring to fig. 1, after the column top connection area is connected, concrete 6 is integrally poured into the hollow section of the reserved through hole 503 and the steel pipe 201.
The outer wall of the steel tube concrete column 2 close to the lower end is provided with a plurality of column bottom shear connectors 205, and the column bottom shear connectors 205 are positioned in the concrete 4 poured behind the column base connection area. A plurality of column top shear connectors 206 are arranged on the inner wall of the hollow section of the steel pipe 201, and the column top shear connectors 206 are positioned in the concrete 6 poured behind the column top connection area. In this embodiment, the column bottom shear connector 205 and the column top shear connector 206 may be in the form of stirrups, PBLs, or studs or other types of shear connectors.
Example 2:
the embodiment discloses a construction process of an assembly type thin-wall concrete-filled steel tube pier system based on embodiment 1, which comprises the following steps:
1) and pouring the steel pipe concrete column 2.
2) And sleeving the column base outer wrapping steel 3 on the steel tube concrete column 2.
3) The lower end of the steel tube concrete column 2 is positioned and installed through a plurality of positioning screws I102 and a plurality of positioning grooves I2031, and nuts are screwed into the positioning screws I102. And a plurality of anchoring steel bars I101 are inserted into a gap between the column base outer steel 3 and the steel tube concrete column 2.
4) And casting concrete 4 into the column base connection area in the column base outer steel 3.
5) After the post-cast concrete 4 in the column base connection area reaches the specified strength, the prefabricated bent cap 5 is positioned and installed through a plurality of positioning screws II 502 and a plurality of positioning grooves II 2041, and nuts are screwed into the positioning screws II 502. And a plurality of anchoring steel bars II 501 are inserted into the hollow section at the upper end of the concrete-filled steel tubular column 2.
6) And pouring concrete 6 after the column top connection area is poured through the reserved through hole 503.
Example 3:
the main steps of this embodiment are the same as those of embodiment 2, and further, the concrete filled steel tubular column 2 in step 1) is prefabricated casting in a factory or cast in situ.
Example 4:
the embodiment discloses an assembled thin-walled steel tube concrete pier system, which comprises a bearing platform 1, a steel tube concrete column 2, column base outer wrapping steel 3, column base connection area rear pouring concrete 4, a prefabricated capping beam 5 and column top connection area rear pouring concrete 6. Referring to fig. 7, in the present embodiment, the pier system is a dual column system.
Be equipped with two sets of embedded steel bars I and two sets of embedded screw I on the cushion cap 1, every group embedded steel bar I all is equipped with a set of embedded screw I including I101 of many anchor bars that enclose into the circle in every group embedded steel bar I, every group embedded screw I including I102 of many positioning screw that enclose into the circle, 1 upper surface of cushion cap is all stretched out to I101 of anchor bar and positioning screw I102.
Referring to fig. 3, the concrete filled steel tube column 2 comprises a steel tube 201 and a concrete column 202 located in the steel tube 201, wherein the lower end of the concrete column 202 is flush with the lower end of the steel tube 201, the upper end of the concrete column 202 is located below the upper end of the steel tube 201, and the upper section of the steel tube 201 has a hollow section with a length h.
The lower extreme welding of steel core concrete column 2 has location end plate 203, is provided with a plurality of constant head tanks I2031 on the location end plate 203, and a plurality of constant head tanks I2031 on the location end plate 203 are corresponding with many positioning screw I102 in a set of embedded screw I respectively.
The lower ends of the two steel pipe concrete columns 2 are respectively inserted into the two groups of embedded steel bars I, and the positioning screws I102 penetrate through the corresponding positioning grooves I2031 and are screwed into the nuts.
The lower end of each steel tube concrete column 2 is sleeved with column base outer steel wrapping 3, the lower end of the column base outer steel wrapping 3 is in surface contact with the upper surface of the bearing platform 1, and concrete 4 is poured after a column base connecting area is filled between the steel tube concrete column 2 and the column base outer steel wrapping 3. In this embodiment, the column shoe outer steel 3 is a metal corrugated pipe, and the column shoe outer steel 3 provides lateral restraint for the concrete 4 poured behind the column shoe connection area, so that the column shoe and the bearing platform 1 can be reliably connected.
Be provided with two sets of embedded steel bars II on prefabricated bent cap 5, two sets of embedded screw II and two reservation through-holes 503, every group embedded screw II is including enclosing into many positioning screw II 502 of circle, all be equipped with a set of embedded steel bar II in every group embedded screw II, every group embedded steel bar II is including enclosing into many anchor reinforcing bars II 501 of circle, all be equipped with one in every group embedded steel bar II and reserve through-hole 503, reserve through-hole 503 and run through prefabricated bent cap 5's upper and lower surface, anchor reinforcing bar II 501 and positioning screw II 502 all stretch out prefabricated bent cap 5 lower surface.
The upper end of each concrete filled steel tubular column 2 is connected with a positioning outer ring plate 204, the inner diameter of the positioning outer ring plate 204 is consistent with that of the steel tube 201, and the outer diameter of the positioning outer ring plate 204 is larger than that of the steel tube 201. And a plurality of positioning grooves II 2041 are formed in the positioning outer ring plate 204, and a plurality of positioning grooves II 2041 in one positioning outer ring plate 204 correspond to a plurality of positioning screws II 502 in a group of embedded screws II respectively.
The exposed ends of the two groups of embedded steel bars II are respectively inserted into the hollow sections of the two steel pipes 201, the reserved through holes 503 are overlapped with the axes of the steel pipes 201, and each positioning screw II 502 penetrates through the corresponding positioning groove II 2041 and is screwed into a nut.
And pouring concrete 6 after the column top connection area into the hollow section of the reserved through hole 503 and the steel pipe 201 integrally.
Example 5:
the main structure of this embodiment is the same as that of embodiment 4, and further, referring to fig. 3, a plurality of column bottom shear connectors 205 are arranged on the outer wall of the concrete filled steel tubular column 2 near the lower end, and the column bottom shear connectors 205 are located in the concrete 4 poured behind the column base connection area.
Example 6:
the main structure of this embodiment is the same as that of embodiment 4, and further, referring to fig. 3, a plurality of column top shear connectors 206 are arranged on the inner wall of the hollow section of the steel pipe 201, and the column top shear connectors 206 are located in the concrete 6 poured behind the column top connection area.
Claims (5)
1. The utility model provides an assembled thin wall steel pipe concrete pier system which characterized in that: the method comprises a bearing platform (1), a steel pipe concrete column (2), column base outer wrapping steel (3), column base connection area rear pouring concrete (4), a prefabricated capping beam (5) and column top connection area rear pouring concrete (6);
the bearing platform (1) is provided with a plurality of groups of embedded steel bars I and a plurality of groups of embedded screws I, each group of embedded steel bars I comprises a plurality of anchoring steel bars I (101) which enclose a circle, each group of embedded steel bars I is internally provided with a group of embedded screws I, each group of embedded screws I comprises a plurality of positioning screws I (102) which enclose a circle, and the anchoring steel bars I (101) and the positioning screws I (102) extend out of the upper surface of the bearing platform (1);
the steel tube concrete column (2) comprises a steel tube (201) and a concrete column (202) located in the steel tube (201), the lower end of the concrete column (202) is flush with the lower end of the steel tube (201), the upper end of the concrete column (202) is located below the upper end of the steel tube (201), and the upper section of the steel tube (201) is provided with a hollow section with the length of h;
the lower end of the steel tube concrete column (2) is welded with a positioning end plate (203), a plurality of positioning grooves I (2031) are formed in the positioning end plate (203), and the positioning grooves I (2031) in one positioning end plate (203) correspond to a plurality of positioning screws I (102) in a group of embedded screws I respectively;
the lower ends of the steel tube concrete columns (2) are respectively inserted into the groups of embedded steel bars I, and positioning screws I (102) penetrate through corresponding positioning grooves I (2031) and are screwed into nuts;
the lower end of each steel tube concrete column (2) is sleeved with column base outer wrapping steel (3), the lower end of the column base outer wrapping steel (3) is in contact with the upper surface of the bearing platform (1), and concrete (4) is poured after a column base connecting area is filled between the steel tube concrete column (2) and the column base outer wrapping steel (3);
the prefabricated capping beam is characterized in that a plurality of groups of embedded steel bars II, a plurality of groups of embedded screws II and a plurality of reserved through holes (503) are arranged on the prefabricated capping beam (5), each group of embedded screws II comprises a plurality of positioning screws II (502) which enclose a circle, a group of embedded steel bars II is arranged in each group of embedded screws II, each group of embedded steel bars II comprises a plurality of anchoring steel bars II (501) which enclose a circle, a reserved through hole (503) is arranged in each group of embedded steel bars II, the reserved through holes (503) penetrate through the upper surface and the lower surface of the prefabricated capping beam (5), and the anchoring steel bars II (501) and the positioning screws II (502) extend out of the lower surface of the prefabricated capping beam (5);
the upper end of each steel tube concrete column (2) is connected with a positioning outer ring plate (204), the inner diameter of the positioning outer ring plate (204) is consistent with that of the steel tube (201), and the outer diameter of the positioning outer ring plate (204) is larger than that of the steel tube (201); a plurality of positioning grooves II (2041) are formed in the positioning outer ring plate (204), and a plurality of positioning grooves II (2041) in one positioning outer ring plate (204) correspond to a plurality of positioning screws II (502) in a group of embedded screws II respectively;
the exposed ends of a plurality of groups of embedded steel bars II are respectively inserted into the hollow sections of a plurality of steel pipes (201), the reserved through holes (503) are overlapped with the axes of the steel pipes (201), and each positioning screw rod II (502) penetrates through the corresponding positioning groove II (2041) and is screwed into a nut;
and after the column top connection area, concrete (6) is integrally poured into the hollow sections of the reserved through holes (503) and the steel pipes (201).
2. The fabricated thin-walled concrete-filled pier system according to claim 1, wherein: the outer wall of the steel tube concrete column (2) close to the lower end is provided with a plurality of column bottom shear connectors (205), and the column bottom shear connectors (205) are located in concrete (4) poured behind the column base connection area.
3. The fabricated thin-walled concrete-filled pier system according to claim 1, wherein: and a plurality of column top shear connectors (206) are arranged on the inner wall of the hollow section of the steel pipe (201), and the column top shear connectors (206) are positioned in the concrete (6) poured behind the column top connection area.
4. The construction process of the fabricated thin-walled concrete-filled steel tube pier system based on claim 1, is characterized in that: the method comprises the following steps:
1) pouring a plurality of concrete-filled steel tubular columns (2);
2) sleeving the column base outer wrapping steel (3) on the steel tube concrete column (2);
3) the lower end of the steel tube concrete column (2) is positioned and installed through a plurality of positioning screws I (102) and a plurality of positioning grooves I (2031), and nuts are screwed on each positioning screw I (102); wherein, a plurality of anchoring steel bars I (101) are inserted into a gap between the column base outer covering steel (3) and the steel tube concrete column (2);
4) casting concrete (4) into the column base outer steel (3) after casting the column base connection area;
5) after the post-cast concrete (4) of the column base connection area reaches the specified strength, the prefabricated capping beam (5) is positioned and installed through a plurality of positioning screws II (502) and a plurality of positioning grooves II (2041), and nuts are screwed into the positioning screws II (502); wherein, a plurality of anchoring steel bars II (501) are inserted into the hollow section at the upper end of the steel pipe concrete column (2);
6) and pouring concrete (6) after the column top connecting area is poured through the reserved through hole (503).
5. The construction process of the assembled thin-walled concrete-filled steel tube pier system according to claim 4, wherein the construction process comprises the following steps: the concrete-filled steel tube column (2) in the step 1) is prefabricated and poured in a factory or poured in place.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592423A (en) * | 2022-04-01 | 2022-06-07 | 中国十九冶集团有限公司 | Wet joint connection construction method of prefabricated pier stud and bearing platform |
| CN115110406A (en) * | 2022-04-20 | 2022-09-27 | 重庆大学 | Self-resetting steel pipe concrete assembled pier wrapped with constraint RC and construction process thereof |
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| CN114592423B (en) * | 2022-04-01 | 2024-01-30 | 中国十九冶集团有限公司 | Wet joint connection construction method for prefabricated pier column and bearing platform |
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