A sunken column base and a construction method thereof

Abstract

The application discloses a buried column foot and a construction method thereof, and belongs to the technical field of structural engineering; the technical problem that the reliable connection of steel pipe columns or steel pipe concrete columns with various cross sections and steel bars with any angle cannot be ensured during the construction process of a foundation bottom plate is solved. The buried column foot comprises a column foot and a universal connecting device; the column foot comprises a column foot bottom plate and a column body; the column body is connected to the upper end surface of the column foot bottom plate; the universal connecting device is connected to the column body; the universal connecting device comprises a horizontal connecting unit and a vertical connecting unit; the normal line of the vertical connecting unit outer vertical surface is consistent with the axis direction of the connected steel bar. The application ensures the reliability of the connection of steel pipe columns or steel pipe concrete columns with various cross sections and steel bars with any angle, avoids the damage and stress concentration of components caused by on-site hole opening, and makes the engineering structural system safe, stable and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of structural engineering, in particular to a buried column foot and a construction method thereof. BACKGROUND

[0002] The so-called foundation bottom plate is a reinforced concrete plate directly contacting with the soil layer (actually a cushion layer) at the foundation position of a building. The foundation bottom plate is arranged above the column foot of a steel pipe column or a steel pipe concrete column, and includes a steel mesh arranged in a horizontal and vertical double direction and integrated with a plurality of steel pipe columns or steel pipe concrete columns, and a concrete plate integrated with the steel mesh.

[0003] Steel pipe columns and steel pipe concrete columns are increasingly widely used in high-rise buildings and large-span structures due to their high bearing capacity, large stiffness, good ductility and excellent seismic performance. Among them, the steel pipe column can fully utilize the characteristics of high material strength, light component weight and good seismic performance; the steel pipe concrete column can effectively improve the strength and deformation capacity of the concrete through the constraint effect of the steel pipe on the concrete in the column, while the concrete can effectively suppress the buckling deformation of the steel plate and increase the width-thickness ratio of the steel plate, which is suitable for heavy load-bearing components. Steel pipe columns or steel pipe concrete columns can be divided into rectangular cross-section and circular cross-section according to the shape of the steel pipe.

[0004] The column foot of a steel pipe column or a steel pipe concrete column is a structural component at the bottom of the column body, and is a key part connecting the vertical component and the foundation, which has a significant impact on the safety of the overall structure of the building and the reliability of force transmission of the building structure. With the increase of building height, the cross-sectional size of the steel pipe column can reach about 2m, and the cross-sectional size of the steel pipe concrete column can reach 3m to 5m; the foundation bottom plate bears a huge force, and its thickness can reach about 5m. In order to ensure the force requirement of the foundation bottom plate, it is often necessary to configure multiple rows of large-diameter load-bearing steel bars in two directions, and the connection relationship between the column foot of the steel pipe column or the steel pipe concrete column and the foundation bottom plate is very important.

[0005] So far, the research on the mechanical properties of the buried column foot mainly focuses on the buried depth, and there is still a large gap in the research on the connection between the column foot and the steel bars of the foundation bottom plate, especially the connection method between the column foot of the large-diameter steel pipe column or the steel pipe concrete column and the steel bars of the foundation bottom plate.

[0006] At present, the connection methods of steel pipe column or concrete filled steel tube column with steel bars in any cross-sectional shape mainly include the following: perforation method, steel bar connecting plate method and steel bar connector method. Due to the more intensive arrangement of the base plate steel bars and the randomness of the direction, the connection of the base plate steel bars with the steel pipe column or concrete filled steel tube column is more complex, and the above connection methods have certain limitations, especially the connection of the steel pipe column or concrete filled steel tube column with the steel bars in non-circular cross-sectional shape, which needs to consider more factors in stress and structure. The perforation method will weaken the cross-section of the steel pipe column in the hole opening process, reduce the bearing capacity, and at the same time, it is difficult to operate the steel bars through the steel pipe column on site, and the construction quality and safety cannot be guaranteed; the steel bar connecting plate method is applied to a large number of steel bar connections, the steel plate is used in large quantities, the on-site welding amount is large, and the quality of the concrete pouring is difficult to guarantee; the steel bar connector is difficult to adapt to the situation that the direction of the steel pipe and the steel bar is not perpendicular. In addition, the above three methods are only limited to the connection of the steel bars in the same horizontal plane and parallel or perpendicular to each other, and the connection of the steel bars arranged in random direction, i.e. the steel bars in any angle with the column foot, does not exist.

[0007] Although the steel pipe column and the concrete filled steel tube column in various cross-sectional shapes are more and more widely used in the engineering field, the research on the connection of the steel bars with the details of the components is not mature, which to some extent restricts the development process of the application.

[0008] At present, a new device and a new construction method are urgently needed to solve the above problems. SUMMARY

[0009] The key technical problem to be solved by the present application is to provide a foundation bottom plate installation structure with a universal connecting device, which is reliable in force transmission, simple in structure and economical in cost, and realizes efficient connection of the steel pipe column or concrete filled steel tube column foot with steel bars in any direction.

[0010] The present application adopts the following technical solutions to solve the above technical problems:

[0011] A buried column foot, characterized in that it comprises a column foot and a universal connecting device; the column foot comprises a column foot bottom plate and a column body; the column body is connected to the upper end surface of the column foot bottom plate; the universal connecting device is connected to the column body; the universal connecting device comprises a horizontal connecting unit and a vertical connecting unit; the inner ring of the horizontal connecting unit is connected to the column body; and the outer ring of the horizontal connecting unit is connected to the middle part of the inner side vertical surface of the vertical connecting unit.

[0012] Further, the column foot further comprises a column foot stiffening rib; the column foot stiffening rib is connected to the column foot bottom plate and simultaneously connected to the outer side of the column body.

[0013] Further, the column foot further comprises a horizontal stiffening rib; the horizontal stiffening rib is arranged inside the column body, the horizontal stiffening rib is coplanar with the horizontal connecting unit; the center of the horizontal stiffening rib is provided with a concrete pouring hole.

[0014] Further, the column foot further comprises an outer side bolt and an inner side bolt; the outer side bolt is connected to the outer side of the column body; the inner side bolt is symmetrically arranged on the inner wall and the outer wall of the column body in the normal direction and the axial direction of the column body.

[0015] Further, the horizontal connecting unit comprises a horizontal connecting plate; the inner side of the horizontal connecting plate is connected to the outer wall of the column body; the outer side of the horizontal connecting plate is connected to the middle part of the inner vertical surface of the vertical connecting unit.

[0016] Further, the vertical connecting unit comprises a vertical connecting plate; a plurality of rows of steel bar connector groups are uniformly arranged in the vertical direction of the outer vertical surface of the vertical connecting plate; each row of the steel bar connector groups comprises a plurality of uniformly arranged steel bar connectors.

[0017] Further, the universal connecting device further comprises a universal connecting reinforcing unit; the universal connecting reinforcing unit is connected to the upper and lower end surfaces of the horizontal connecting plate and connected with the vertical connecting plate; the universal connecting reinforcing unit is arranged opposite to the steel bar connector on both sides of the vertical connecting plate.

[0018] Further, the column body is a steel pipe column or a steel pipe concrete column with a circular or rectangular cross section; the vertical connecting unit has a symmetric right-angled polygonal structure in cross section.

[0019] A construction method of the embedded column foot, comprising the following steps:

[0020] S1, column foot component processing and manufacturing:

[0021] S2, transporting the column foot component to the foundation pit on site, and temporarily fixing the column foot component at the corresponding position of the foundation bottom plate;

[0022] S3, completing the overall construction of the column foot in the foundation pit.

[0023] By adopting the above technical scheme, the following technical effects can be achieved by the embedded column foot:

[0024] 1, the universal connecting device is connected to the column foot, so that the embedded column foot can adapt to the steel bar arrangement in any axial direction, and the most reasonable force distribution can be obtained under the least amount of steel material with the most reasonable steel bar arrangement;

[0025] 2. The vertical connecting plate thickness can be reduced by setting the universal connecting reinforcing unit short stiffening rib on the periphery, and the layered tearing phenomenon of the vertical connecting plate can be effectively avoided;

[0026] 3. The mechanical bite force between the embedded column foot steel member and the concrete is effectively enhanced by setting the outer side peg and the inner side peg on the side wall of the steel pipe, and setting the peg or the bite unit on the short stiffening rib, the horizontal connecting plate and the vertical connecting plate, and the effect of the internal force transmission between the column foot and the foundation bottom plate is improved;

[0027] 4. The application establishes a new connection mode of the foundation bottom plate steel bar and the column foot of the steel pipe column or the steel pipe concrete column, the vertical connecting plate of the right-angle polygon is set, so that the steel bar is arranged on the steel structure member with the same direction of the normal line and the steel bar axis; the connection structure realizes the reliable connection of the steel bar with any angle and the column foot of the steel pipe column or the steel pipe concrete column with various cross-sectional shapes on the basis of ensuring the safe and reliable force transmission of the embedded column foot, and effectively avoids the component damage and stress concentration phenomenon caused by the hole opening operation in the construction site, and the construction method is effective;

[0028] 5. The device of the application is simple and reliable, the construction method of the application is advanced in technology, reasonable in stress, convenient in construction, safe and reliable, and suitable for the reliable connection of the steel bar with any angle, multiple rows and bidirectional and the column foot of the steel pipe column or the steel pipe concrete column with any cross-sectional shape; the embedded column foot and the construction method thereof can be widely applied. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to further clearly understand the technical means of the application, the application is described in detail in combination with the following drawings and specific embodiments.

[0030] The drawings are only used for the purpose of showing specific technical means, and are not considered as limitations of the application, and the same reference signs represent the same parts in the whole drawings.

[0031] Figure 1 is a front view of the device structure of the application Figure 1 ;

[0032] Figure 2 is a front view of the device structure of the application Figure 1 ;

[0033] Figure 3 is a front view of the device structure of the application Figure 1 ;

[0034] Figure 4 is a front view of the device structure of the application Figure 2 ;

[0035] Figure 5 is a front view of the device structure of the application Figure 4Cross-sectional view of the middle along the C-C direction;

[0036] Figure 6 As Figure 5 Schematic view of the middle along the D-D direction;

[0037] Figure 7 As Figure 3 ;

[0038] Figure 8 As Figure 7 Schematic view of the middle along the F-F direction;

[0039] Figure 9 As Figure 4 ;

[0040] Figure 10 As Figure 9 Schematic view of the middle along the G-G direction;

[0041] Figure 11 As Figure 1 ;

[0042] Figure 12 As Figure 2 ;

[0043] Figure 13 As

[0044] Figure 14 As

[0045] Figure 15 As Figure 6 Schematic view of the middle along the E part alternative structure.

[0046] Reference signs:

[0047] 1. column foot; 11. column foot bottom plate; 111-1. bottom plate rectangular groove; 111-2. bottom plate circular groove; 12. column body; 12-1. rectangular steel pipe column or rectangular steel pipe concrete column; 12-2. circular steel pipe column or circular steel pipe concrete column; 13. column foot stiffening rib; 14. horizontal stiffening rib; 141. concrete pouring hole; 15. outer side stud; 16. inner side stud; 21. horizontal connection unit; 211. horizontal connection plate; 2111. horizontal connection plate air hole; 22. vertical connection unit; 221. vertical connection plate; 23. universal connection reinforcing unit; 231. short stiffening rib; 24. steel bar connector; 25. engagement unit; 251. engagement rod; 252. engagement body; 26. stopper; 100. steel bar; 200. foundation bottom plate installation structure. DETAILED DESCRIPTION

[0048] The following will be described in detail Figures 1 to 15 , specifically the embedded column foot of the universal connecting device of the application, and the foundation bottom plate frame with the embedded column foot.

[0049] An embedded column foot, which is connected with a steel bar 100 to form a foundation bottom plate installation structure 200. The embedded column foot comprises a column foot 1 and a universal connecting device; the column foot 1 comprises a column foot bottom plate 11 and a column body 12; the column body 12 is connected to the upper end of the column foot bottom plate 11; the universal connecting device is connected to one cross section of the column body 12; the universal connecting device comprises a horizontal connecting unit 21 and a vertical connecting unit 22; the normal line of the vertical connecting unit 22 outer vertical surface is consistent with the axis direction of the connected steel bar 100.

[0050] Preferably, the distance of the cross section from the column foot bottom plate 11 is related to the cross section structure size of the column body 12. Specifically, when the cross section is rectangular, the distance of the cross section from the column foot bottom plate 11 is not less than 2 times the long axis; specifically, when the cross section is circular, the distance of the cross section from the column foot bottom plate 11 is not less than 2.5 times the diameter.

[0051] Specifically, according to the different cross section shapes of the column body 12, whether the short axis of the cross section is greater than 800mm, four specific embodiments of the application are described in detail:

[0052] First embodiment: the column body 12 is a rectangular steel pipe column or a rectangular steel pipe concrete column 12-1 with a rectangular cross section, and the short side of the rectangle is greater than 800mm; the cross section of the vertical connecting unit 22 is a rectangle equidistant from the cross section of the column body 12, and is preferably a square, as shown in Figure 1 、 Figure 2 and Figure 3

[0053] Second embodiment: the column body 12 is a rectangular steel pipe column or a rectangular steel pipe concrete column 12-1 with a rectangular cross section, and the short side of the rectangle is not greater than 800mm; the cross section of the vertical connecting unit 22 is a rectangle equidistant from the cross section of the column body 12, and is preferably a square, as shown in Figure 4 、 Figure 5 and Figure 6

[0054] Third embodiment: the column body 12 is a circular steel pipe column or a circular steel pipe concrete column 12-2 with a circular cross section, and the diameter of the cross section circle is greater than 800mm; the cross section of the vertical connecting unit 22 is a symmetrical structure of a straight angle polygon equidistantly distributed on the circumference of the cross section of the column body 12, and is preferably a symmetrical Chinese character shape, as shown in Figure 3 、 Figure 7 and Figure 8

[0055] ​​​The fourth embodiment is a circular steel pipe column or a circular steel pipe concrete column 12-2 with a circular cross section of the column body 12, and the diameter of the circular cross section is not greater than 800 mm; the vertical connecting unit 22 has a square cross section which is uniformly distributed outside the circumference of the cross section of the column body 12; as shown in Figure 3 , Figure 7 and Figure 8 ; as shown in Figure 6 , Figure 9 and Figure 10 ; and as shown in

[0056] In the four embodiments, the column base plate 11 can have any shape suitable for the location of the building foundation. In the four embodiments, the column base plate 11 is preferably square, and further preferably, the length of a side of the square column base plate 11 is not less than twice the length of the major axis of the cross section of the column body 12. The column body 12 is installed at the center of the column base plate 11. Preferably, in the first and second embodiments, a rectangular slot 111-1 is provided on the column base plate 11, as shown in Figure 13 ; the bottom of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1 is arranged in the rectangular slot 111-1, and then the periphery of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1 is welded to the column base plate 11, as shown in Figure 1 and Figure 4 . Preferably, in the third and fourth embodiments, a circular slot 111-2 is provided on the column base plate 11, and the bottom of the circular steel pipe column or the circular steel pipe concrete column 12-2 is arranged in the circular slot 111-2, and then the periphery of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1 is welded to the column base plate 11.

[0057] In the four embodiments, the column base 1 further comprises a column base stiffening rib 13; the column base stiffening rib 13 is welded to the column base plate 11 and to the outside of the column body 12. Specifically, the column base stiffening rib 13 has a right-angled plate structure, the inner vertical surface of which is welded to the column body 12, the bottom surface of which is welded to the column base plate 11, and the outer vertical surface of which is close to the outer edge of the column base plate 11, as shown in Figure 1 , Figure 4 and Figure 7 .

[0058] Preferably, in the first and second embodiments, the column base stiffening ribs 13 are uniformly distributed on each of the straight sides of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1, and the column base stiffening ribs 13 are welded after the inner vertical surface thereof is perpendicularly connected to the vertical surface of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1.

[0059] Preferably, the column foot stiffening ribs 13 in the third and fourth embodiments are circumferentially distributed on the outer cylindrical surface of the circular steel pipe column or the circular steel pipe concrete column 12-2, and the column foot stiffening ribs 13 are welded with their inner vertical surfaces to the generatrix of the circular steel pipe column or the circular steel pipe concrete column 12-2 where they are located.

[0060] Specifically, in the first and third embodiments, the column foot 1 further comprises outer side studs 15 and inner side studs 16; the outer side studs 15 are connected to the outer side of the column body 12; the inner side studs 16 are symmetrically arranged on the inner wall and the outer wall of the column body 12, and are circumferentially and axially distributed.

[0061] Further specifically, in the first embodiment, the outer side studs 15 and the inner side studs 16 are circumferentially, i.e. horizontally, distributed on each square side of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1, and are axially, i.e. vertically, distributed in layers, as shown in Figure 1 .

[0062] Further specifically, in the third embodiment, the outer side studs 15 and the inner side studs 16 are circumferentially, i.e. horizontally, distributed on each square cross-section of the circular steel pipe column or the circular steel pipe concrete column 12-2, and are axially, i.e. vertically, distributed in layers, as shown in Figure 7 .

[0063] In the four specific embodiments, the column foot 1 further comprises horizontal stiffening ribs 14; the horizontal stiffening ribs 14 are arranged inside the column body 12, and are specifically welded on the upper and lower peripheries; the horizontal stiffening ribs 14 are coplanar with the horizontal connecting units 21; the horizontal stiffening ribs 14 have a central concrete pouring hole 141, as shown in Figure 1 , Figure 4 and Figure 7 . Preferably, the concrete pouring hole 141 is circular.

[0064] Further preferably, when the short side of the cross-section of the rectangular steel pipe column or the rectangular steel pipe concrete column 12-1 or the diameter of the cross-section of the circular steel pipe column or the circular steel pipe concrete column 12-2 is small, the diameter of the concrete pouring hole 141 is preferably 240mm-320mm; the small size generally refers to the size range of 600mm-800mm.

[0065] Further preferably, when the cross-sectional short side of the rectangular steel pipe column or the rectangular concrete-filled steel tube column 12-1 or the cross-sectional diameter of the circular steel pipe column or the circular concrete-filled steel tube column 12-2 is large, the diameter of the concrete pouring hole 141 is preferably not less than 500 mm to meet the operation requirements of the internal welding of the inner studs 16. The large size refers to a size range of not less than 500 mm. Further preferably, the column foot stiffening ribs 13 welded at the bottom of the interior of the rectangular steel pipe column or the rectangular concrete-filled steel tube column 12-1 or the circular steel pipe column or the circular concrete-filled steel tube column 12-2 are welded opposite to the column foot stiffening ribs 13 outside.

[0066] Specifically, the horizontal connecting unit 21 is composed of a plurality of horizontal connecting plates 211; the inner side of the horizontal connecting plate 211 is connected to the outer wall of the column body 12; and the outer side of the horizontal connecting plate 211 is connected to the middle part of the inner vertical surface of the vertical connecting unit 22.

[0067] Preferably, the horizontal stiffening ribs 14 welded inside the column body 12 and the horizontal connecting plates 211 welded integrally outside the column body 12 are located on the same horizontal plane; further preferably, the thickness of the horizontal stiffening ribs 14 is consistent with that of the horizontal connecting plates 211.

[0068] Further specifically, the horizontal connecting unit 21 is generally in the form of a ring-shaped plate structure. The inner circle of the horizontal connecting unit 21 is shaped to connect the outer side of the column body 12, which is in the form of a rectangle or a circle. The vertical connecting unit 22 is composed of a plurality of vertical connecting plates 221, and the outer circle of the horizontal connecting unit 21 is shaped to the inner side of the vertical connecting unit 22 surrounded by the plurality of vertical connecting plates 221. Preferably, the inner circle and the outer circle of the horizontal connecting plate 211 are both made of double-bevel grooves, which are beneficial to the circumferential welding of the upper and lower surfaces.

[0069] Specifically, a plurality of horizontal connecting plate air holes 2111 are uniformly distributed between the inner circle and the outer circle of the horizontal connecting plate 211, which are used to ensure the pouring quality of the concrete at the lower part of the horizontal connecting plate 211. As shown in Figure 2 and Figure 6 Preferably, the horizontal connecting plate air holes 2111 are located at the middle position between the inner circle and the outer circle of the horizontal connecting plate 211.

[0070] The horizontal connecting unit 21 further includes a plurality of engagement units 25 uniformly distributed on the horizontal connecting plate 211. The engagement unit 25 can be used alone, as shown in Figure 15 or can be an engagement unit used jointly by two engagement units arranged oppositely. Specifically, the engagement unit includes an engagement rod 251, the first end of which is provided with a screw rod for matching the screw hole provided on the horizontal connecting unit 21 and connecting with the horizontal connecting unit 21; the engagement unit includes an engagement body 252 connected to the second end of the engagement rod 251; and the engagement body 252 can be any structure that can engage with the solidified concrete, and is preferably as shown in Figure 13The circular ring structure, together with the occlusion rod 251, forms a ring-shaped occlusion unit, as shown in Figure 11 The occlusion body 252 can also be a flat plate structure, as shown in Figure 14 The flat plate structure, together with the occlusion rod 251, forms a plate-shaped occlusion unit, as shown in Figure 12 Preferably, the occlusion unit 25 is used in combination with the limiting stopper 26. The limiting stopper 26 is a plate with screw holes, which is used to limit and fix the occlusion unit 25 on the horizontal connecting plate 211, preventing the occlusion unit 25 from loosening and avoiding the integrity of the foundation base plate.

[0071] Preferably, the occlusion unit 25 in the four specific embodiments is a ring-shaped occlusion unit, as shown in Figure 6 Further preferably, the occlusion unit 25 in the four specific embodiments is used alone, as shown in Figure 15 In the four specific embodiments, the outer side peg 15 and the inner side peg 16 can be plate-shaped occlusion units, which are screwed on the column body 12; or they can be pegs without threads on the occlusion rod 251, which are light rods directly welded on the column body 12.

[0072] Specifically, the vertical connecting unit 22 includes a vertical connecting plate 221; the vertical direction of the outer vertical surface of the vertical connecting plate 221 is uniformly distributed with multiple rows of steel bar connectors; each row of steel bar connectors includes multiple uniformly distributed steel bar connectors 24. The steel bar connector 24 is a column with a threaded hole in the inside, as shown in Figure 6 Since the steel bars 100 are arranged in multiple layers in perpendicular directions, the steel bar connectors 24 are also arranged in layers. Figure 3 As shown, two rows of connectors are arranged on the vertical plate in the same direction of the vertical connecting plate 221 of the Wuxi connecting device 2 to connect the steel bars in the first direction; correspondingly, two rows of connectors are arranged in staggered layers on the other vertical plates perpendicular to the vertical plate to connect the steel bars in the second direction perpendicular to the first direction.

[0073] Further specifically, the vertical connecting plate 221 is generally a closed ring plate structure enclosed by a group of vertical plates, which are multiple rectangular flat plates welded together. The inner vertical surface of the enclosed vertical connecting plate 221 is connected to the outer circle of the horizontal connecting plate 211 in the middle. The vertical connecting plate 221 is symmetrically arranged relative to the horizontal connecting plate 211.

[0074] Further specifically, in the first embodiment and the second embodiment, the cross section of the vertical connecting plate 221 is a quadrilateral equidistant from the cross section of the corresponding rectangular column body 12; when the connected steel bar 100 is consistent or perpendicular to the normal line of the vertical connecting plate 221, the cross section shape of the vertical connecting plate 221 is parallel to the cross section shape of the corresponding rectangular column body 12, so that the circumferential length of the horizontal connecting plate 211 in any direction is basically consistent, which ensures that the horizontal connecting plate 211 and the entire universal connecting device are balanced in stress and stable in structure; when the connected steel bar 100 is not consistent or perpendicular to the normal line of the vertical connecting plate 221, but at an angle α, as shown in Figure 2 , the cross section shape of the vertical connecting plate 221 is rotated by an angle α to ensure that the steel bar is consistent with the normal line of the outer vertical surface of the vertical connecting plate 221, so that the foundation bottom plate mounting structure 200 composed of the column base 1 and the steel bar 100 is reasonably stressed and stable in structure.

[0075] Further specifically, in the third embodiment, since the diameter of the column body 12 is not less than 800 mm, the diameter is relatively large, in order to make the cross section of the rectangular vertical connecting plate 221 not too different from the cross section of the corresponding column body 12, the vertical connecting plate 221 adopts a structure in which multiple rectangular plates are arranged symmetrically to form a straight polygonal cross section, as shown in Figure 8 Each side of the straight polygonal structure is consistent with the axis direction of the connected steel bar 100.

[0076] Further specifically, in the fourth embodiment, since the diameter of the column body 12 is less than 800 mm, the diameter is relatively small, the cross section of the rectangular vertical connecting plate 221 can be greatly different from the cross section of the corresponding column body 12, the vertical connecting plate 221 adopts a rectangular enclosing structure composed of four rectangular plates, preferably a square, which can meet the requirements of balanced stress and stable structure, as shown in Figure 10 .

[0077] Specifically, the universal connecting device further comprises a universal connecting reinforcing unit 23; the universal connecting reinforcing unit 23 is connected to the upper and lower end faces of the horizontal connecting plate 211 and is symmetrically arranged, specifically located at the outer circle of the horizontal connecting plate 211 and connected with the vertical connecting plate 22; the universal connecting reinforcing unit 23 is located on the two sides of the vertical connecting plate 221 opposite to the steel bar connector 24. Preferably, the universal connecting reinforcing unit 23 is specifically a short stiffening rib 231; the short stiffening rib 231 is a plate member including at least one right angle side, as shown in Figure 3 The outer vertical surface and the lower end face are provided with a bevel for facilitating welding with the vertical connecting plate 221 and the horizontal connecting plate 211.

[0078] Further, the vertical connecting unit 22 and the universal connecting reinforcing unit 23 are provided with a clamping unit 25, as shown in Figure 5The uniform distribution of the bite unit 25 does not affect the installation and use of the steel bar connector 24, and can be a plate-shaped bite unit or a ring-shaped bite unit. The bite unit 25 can increase the mechanical bite effect between the concrete and the structural member, and improve the transmission efficiency.

[0079] It can be seen that the embedded column foot of the universal connecting device of the first embodiment and the second embodiment can be vertically connected to the steel bars in any direction at any angle between the straight angle of the cross section of the vertical connecting plate 221 and the center line of the cross section rectangle of the column body 12. Since the cross section of the column body 12 of the first embodiment and the second embodiment is circular, the straight angle of the universal connecting device can be adjusted at will according to the arrangement of the steel bars 100, and the requirement of vertically connecting the steel bars in the direction can be met at any time.

[0080] The column foot 1, the universal connecting device, and the steel bars 100 jointly constitute a foundation bottom plate installation structure 200. Since the steel bar connector 24 can be connected to the vertical connecting plate 221 in the vertical direction at all times, the entire foundation bottom plate installation structure 200 is reasonably stressed and structurally stable; due to the design of the column foot stiffening rib 13, the horizontal stiffening rib 1415, the outer side stud 15, and the inner side stud 16, the structural stability of the column foot 1 is greatly improved; due to the design of the universal connecting reinforcing unit 23, the connecting function of the universal connecting device is enhanced; and due to the design of the bite unit 25, after the concrete is poured, the bite force between the concrete and the foundation bottom plate installation structure 200 is greatly improved. The entire embedded column foot of the universal connecting device and the foundation bottom plate installation structure 200 with the universal connecting device are more evenly stressed and more structurally stable.

[0081] A construction method of an embedded column foot, comprising the following steps:

[0082] S1, column foot 1 component processing and manufacturing:

[0083] S1-1. Weld the horizontal stiffening rib 14 to the inner wall of the column body 12;

[0084] S1-2. Weld the outer side stud 133 to the outer wall of the column body 12 / arrange the outer side stud 133 opposite to the inner side stud 134, and weld them to the outer wall and the inner wall of the column body 12, respectively;

[0085] S1-3. Place the column foot bottom plate 11 with the column body limiting groove 111 on the ground, center the lower end of the column body 12 with the column foot bottom plate 11, and perform beveling and surrounding welding; then, weld each column foot stiffening rib 13 to the column foot bottom plate 11 and the outer wall of the column body 12 using double fillet welds;

[0086] S2, transport the column foot 1 component to the foundation pit on site, and temporarily fix it at the corresponding position of the foundation bottom plate;

[0087] S3, complete the overall construction of the column foot 1 in the foundation pit:

[0088] S3-1. Weld the horizontal connecting unit 21 on the same plane of the horizontal stiffening rib 14 of the column body 12 outer wall;

[0089] S3-2. Weld the vertical connecting unit 22 on the outside of the horizontal connecting unit 21;

[0090] S3-3. Weld the pair of universal connecting reinforcing units 23 evenly between the horizontal connecting plate 21 and the vertical connecting plate 31;

[0091] S3-4. Install the snap unit 25 in the threaded hole provided on the horizontal connecting plate 211;

[0092] S3-5. Weld the steel bar connector 24 on the vertical connecting plate 31;

[0093] After the construction of the embedded column foot is completed, the construction of the embedded column foot and foundation bottom plate collaborative stress system can be continued, and the steps are as follows:

[0094] S4, make the foundation bottom plate installation structure 200:

[0095] S4-1. Connect the foundation internal steel bars 100 to the steel bar connector 24 in a staggered manner along the perpendicular direction, so that the foundation internal steel bars 100 are connected to the plurality of column feet 1 to form a whole, and the foundation bottom plate installation structure 200 is formed;

[0096] S4-2. Pour concrete on the frame of the foundation bottom plate installation structure 200, so that the foundation bottom plate installation structure 200 and the cushion layer form a whole;

[0097] The construction of the embedded column foot and foundation bottom plate collaborative stress system is completed.

[0098] The column foot 1 component of S1 can be completed in a factory.

[0099] The column foot 1 is transported to the construction site in the form of a prefabricated part and is placed in the pre-made foundation pit respectively; S2 is completed.

[0100] Since the vertical connecting plate 221 with the steel bar connector 24 has been designed and installed according to the actual situation of the construction site, the normal line is consistent with the axis of the steel bar 100, so that S3 can directly connect the steel bar 100 between different column feet 1, quickly complete the construction of the foundation bottom plate installation structure 200, and then pour concrete to form the foundation bottom plate installation structure 200 and the cushion layer into a whole.

[0101] The above merely describes the preferred embodiments of the present application. However, the protection scope of the present application is not limited to this. Any simple modification, equivalent change or modification made by any person skilled in the art based on the technical content disclosed in the present application is also covered in the protection scope of the present application.

Claims

1. An embedded column base, characterized in that, Includes column base (1) and universal joint device; The column base (1) includes a column base plate (11) and a column body (12); the column body (12) is connected to the upper end face of the column base plate (11); the universal joint is connected to the column body (12); The universal connection device includes a horizontal connection unit (21), a vertical connection unit (22), a universal connection reinforcement unit (23), a steel bar connector (24), and an interlocking unit (25). The horizontal connecting unit (21) includes a horizontal connecting plate (211); the inner side of the horizontal connecting plate (211) is connected to the outer wall of the column (12); the outer side of the horizontal connecting plate (211) is connected to the middle of the inner facade of the vertical connecting unit (22); The biting units (25) are evenly distributed on the horizontal connecting plate (211). The biting unit (25) includes a biting rod (251). One end of the biting rod (251) is provided with a screw for matching the screw hole provided on the horizontal connecting unit (21) and connecting with the horizontal connecting unit (21). The vertical connection unit (22) includes a vertical connection plate (221); a steel bar connector (24) is connected to the vertical connection plate (221); the normal direction of the outer facade of the vertical connection unit (22) is consistent with the axial direction of the connected steel bar (100); the right-angle side of the cross section of the vertical connection plate (221) and the centerline of the cross section of the column (12) can be at any angle, and the steel bar (100) in that direction can be vertically connected in any direction. The universal joint reinforcement unit (23) is connected between the horizontal connecting plate (211) and the vertical connecting plate (221); the universal joint reinforcement unit (23) and the steel bar connector (24) are located on both sides of the vertical connecting plate (221) and are arranged opposite to each other.

2. The embedded column base according to claim 1, characterized in that, The column base (1) also includes a column base stiffening rib (13); the column base stiffening rib (13) is connected to the column base plate (11) and is also connected to the outside of the column body (12).

3. The embedded column base according to claim 1, characterized in that, The column base (1) also includes horizontal stiffening ribs (14).

4. The embedded column base according to claim 1, characterized in that, The column base (1) further includes an outer stud (15) or the column base (1) further includes an outer stud (15) and an inner stud (16).

5. The embedded column base according to any one of claims 1-4, characterized in that, The column body (12) is a steel pipe column or steel pipe concrete column with a circular or rectangular cross-section; the vertical connecting unit (22) has a symmetrical right-angled polygonal structure in cross-section.

6. A method for constructing an embedded column base according to any one of claims 1-5, comprising the following steps: S1, Column base (1) component processing and fabrication: S2. Transport the column base (1) component to the site pit and temporarily fix it at the corresponding position of the foundation slab; S3. Complete the overall construction of the column base (1) in the foundation pit.

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