Column foot connecting structure and pile foundation device

Abstract

The invention relates to the technical field of buildings, and provides a column foot connecting structure and a pile foundation device. The column foot connecting structure comprises a connecting body and a connecting support, the connecting body is used for being fixedly installed in a foundation, the connecting body is provided with a fixing groove, and at least one end of the fixing groove is provided with a first opening so that a fixing plate can enter the fixing groove through the first opening; the connecting support is detachably installed on the connecting body and at least shields part of the first opening so as to prevent the fixing plate from leaving the fixing groove through the first opening. After the connecting support is detached, the fixing plate can leave the fixing groove through the first opening, so that the supporting structure is detachable and can be repeatedly used. Moreover, the supporting structure is only in contact connection with the fixing groove, a connecting hole site does not need to be formed, the fixing plate cannot be subjected to yield damage due to the fact that the connecting hole site is formed, the integrity of the supporting structure is guaranteed, the supporting structure is detachable and can be repeatedly used, and waste of building resources is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a column foot connection structure and a pile foundation device. Background Art

[0002] The column foot is used to fix the column to the building foundation. The column foot supports the column and directs the force borne by the column to the building foundation. The column foot often transmits a combination of axial force and shear force.

[0003] In the prior art, combined Figure 1 The column foot is usually to fix the column 21 on the fixing plate 22, and then place the fixing plate 22 on the foundation 10, and fix the fixing plate 22 and the foundation 10 firmly and inseparably by anchor rods 30 or bolts, so that the supporting structure 20 including the column 21 and the fixing plate 22 is fixed to the foundation 10.

[0004] However, the existing column base connection structure is not disassembled, so that the supporting structure cannot be disassembled repeatedly, which further affects the reuse of the supporting structure. Summary of the invention

[0005] The purpose of the present invention is to provide a column foot connection structure and a pile foundation device, aiming to solve the technical problem that the existing supporting structure cannot be repeatedly disassembled.

[0006] In a first aspect, the present application provides a column foot connection structure, which is applied to a supporting structure installed in a foundation, wherein the supporting structure comprises a column and a fixing plate fixed to the bottom of the column, and the column foot connection structure comprises:

[0007] A connecting body, the connecting body is used for being fixedly installed in the foundation, the connecting body has a fixing groove, at least one end of the fixing groove has a first opening, so that the fixing plate can enter the fixing groove through the first opening;

[0008] A connecting bracket is detachably mounted on the connecting body, and the connecting bracket at least partially blocks the first opening to prevent the fixing plate from leaving the fixing groove through the first opening.

[0009] In one embodiment, the connection brackets are used in pairs, and a pair of the connection brackets are respectively located at two ends of the connection body and are detachably connected.

[0010] In one of the embodiments, the connecting bracket includes a connecting plate, which is substantially perpendicular to the extension direction of the fixing slot. The connecting plate has a connecting hole, and the connecting hole is used for fasteners to pass through so as to detachably connect a pair of the connecting brackets.

[0011] In one embodiment, the connecting body includes a first clamping member and a second clamping member that are spaced apart, the interval between the first clamping member and the second clamping member forms the fixing groove, the connecting bracket has a receiving groove, one side of the receiving groove has a second opening, and the receiving groove is connected to the first clamping member and the second clamping member through the second opening.

[0012] In one embodiment, a side of the first pressing member close to the second pressing member has a first plane, and the first plane is used to be in close contact with the top surface of the fixing plate.

[0013] In one embodiment, the second pressing member has a second plane on one side close to the first pressing member, and the second plane is used to be in close contact with the bottom surface of the fixing plate.

[0014] In one of the embodiments, a side of the accommodating groove opposite to the second opening has a third plane, and the third plane is used to fit in contact with a side surface of the fixing plate.

[0015] In one embodiment, the bottom of the connecting body is used for fixed installation in the foundation, the top of the connecting body has the fixing groove, the top of the fixing groove has a third opening, and the third opening is used for the column to be exposed from the connecting body.

[0016] In one of the embodiments, the interval between the bottom of the connecting body and the bottom of the connecting bracket is 75 mm to 125 mm.

[0017] In one embodiment, the thickness of the connecting body is 25 mm to 50 mm.

[0018] In one of the embodiments, the connection body includes an insertion plate and an embedded plate, the insertion plate is used to be inserted in the foundation, the embedded plate is arranged approximately vertically on the insertion plate, and the embedded plate is used to be embedded in the foundation.

[0019] In one embodiment, the connecting body is integrally formed.

[0020] In one embodiment, the connecting body includes a plug-in plate, an embedded plate, a first plate member and a second plate member, the embedded plate and the first plate member are respectively connected to the plug-in plate approximately vertically and spaced apart, the number of the plug-in plate, the embedded plate and the first plate member are two and one-to-one corresponding, the two plug-in plates are arranged at intervals, the second plate member is approximately vertically connected between the two plug-in plates, the second plate member is located between the first plate member and the embedded plate, and the first plate member and the second plate member are spaced apart to form the fixing groove.

[0021] In one embodiment, the connecting body is elastically designed.

[0022] In a second aspect, the present application provides a pile foundation device, which includes a foundation, a supporting structure and any one of the column base connection structures described above, wherein the connection body is fixedly installed in the foundation, the supporting structure includes a column and a fixing plate fixed to the bottom of the column, and the fixing plate is located in the fixing groove.

[0023] In one of the embodiments, the foundation is provided with a mounting groove, the mounting groove is used to be filled with concrete, the connecting body is partially located in the mounting groove, and the fixing groove is exposed at the top of the mounting groove.

[0024] In one embodiment, the base has a fixing protrusion, the connecting body is sleeved on the fixing protrusion, and the fixing groove is located on the top of the fixing protrusion.

[0025] The column base connection structure and pile foundation device provided by the present invention have the following beneficial effects: the connection body is fixedly installed on the foundation, the connection body has a fixing groove and a first opening connected to the fixing groove, the fixing plate of the supporting structure enters the fixing groove through the first opening, the connection bracket is fixedly installed and at least partially blocks the first opening, so that the fixing plate is stably located in the fixing groove, and the supporting structure is installed on the foundation; after the connection bracket is disassembled, the fixing plate can leave the fixing groove through the first opening, so that the supporting structure is detachable and reusable; and the supporting structure is only contacted and connected with the fixing groove, and there is no need to open a connection hole, which does not destroy the structure and strength of the fixing plate, and the fixing plate will not be subjected to load, yield and damage due to the opening of the connection hole, thereby ensuring the integrity of the supporting structure and making the supporting structure reusable, solving the technical problem that the existing supporting structure cannot be disassembled repeatedly, and achieving the detachable and reusable supporting structure, thereby reducing the waste of building resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is an application schematic diagram of a column foot connection structure in the prior art;

[0028] Figure 2 A schematic diagram of the application of the first column foot connection structure provided in this application;

[0029] Figure 3A schematic diagram of the structure of the connection bracket of the column foot connection structure provided in this application;

[0030] Figure 4 Another structural schematic diagram of a connection bracket of a column foot connection structure provided in the present application;

[0031] Figure 5 A structural schematic diagram of a connection body of the column foot connection structure provided in this application;

[0032] Figure 6 for Figure 5 Another perspective view of the connected subject in FIG.

[0033] Figure 7 A schematic diagram of the application of the second column foot connection structure provided in this application;

[0034] Figure 8 for Figure 7 Schematic diagram of assembly of column foot connection structure and supporting structure;

[0035] Fig. 9 for Figure 8 Another perspective view of the column base connection structure and the supporting structure;

[0036] Fig.10 A schematic diagram of another structure of the connection body of the column base connection structure provided in the present application;

[0037] Fig.11 for Fig.10 Another perspective view of the connected subject in FIG.

[0038] Fig.12 Assembly process of the second column base connection structure provided in this application Figure 1 ;

[0039] Fig.13 Assembly process of the second column base connection structure provided in this application Figure 2 ;

[0040] Fig.14 A schematic diagram of another application of the second column foot connection structure provided by the present application;

[0041] Fig.15 It is a schematic diagram of the deformation of the column foot connection structure at different buried depths;

[0042] Fig.16 Schematic diagram of the deformation of the column base connection structure at 12mm and 25mm thickness;

[0043] Fig.17 It is a simulation diagram of the column base connection structure at thicknesses of 12mm and 25mm.

[0044] Among them, the reference numerals in the figure are:

[0045] 10. Foundation; 11. Mounting slot; 12. Fixing bump;

[0046] 20. Support structure; 21. Column; 22. Fixed plate;

[0047] 30. Anchor rod;

[0048] 100, connecting body; 101, fixing groove; 102, first opening; 103, third opening; 110, first pressing member; 111, first plane; 120, second pressing member; 121, second plane; 130, insertion plate; 140, embedding plate; 150, first plate; 160, second plate; 170, limiting plate;

[0049] 200, connecting bracket; 201, accommodating groove; 202, second opening; 203, third plane; 210, connecting plate; 211, connecting hole. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0051] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0052] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the prior art, combined Figure 1 The supporting structure 20 includes a column 21 and a fixing plate 22 fixed to the bottom of the column 21, and is non-detachably fixed to the foundation 10 through an anchor rod 30, so that the supporting structure 20 cannot be reused.

[0056] The inventor of the present application conducted a finite element stress analysis on this. When the supporting structure 20 is under pressure, the pressure is transmitted to the foundation 10. The area of ​​the fixing plate 22 can be increased to reduce the stress, so that the supporting structure 20 does not undergo irreversible plastic deformation and cannot be reused. When the supporting structure 20 is under tension, the tension is transmitted to the anchor rod 30 until the anchor rod 30 yields in tension, which results in irreversible plastic deformation. When the supporting structure 20 is under shear force, the shear force is transmitted to the anchor rod 30 until the anchor rod 30 yields in shear, which results in irreversible plastic deformation. In the prior art, the anchor rod 30 is inserted into the connection hole of the fixing plate 22. The tensile yield or shear yield of the anchor rod 30 will transmit the stress to the fixing plate 22, causing the connection hole of the fixing plate 22 to also undergo irreversible plastic deformation, resulting in damage to the supporting structure 20 and making it difficult to reuse.

[0057] Please refer to Figure 2 and Figure 7To this end, an embodiment of the present application provides a column foot connection structure, which is applied to the support structure 20 installed in the foundation 10, and the support structure 20 includes a column 21 and a fixing plate 22 fixed to the bottom of the column 21. The column foot connection structure has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other, and the third direction Z is consistent with the length direction of the column 21. In some embodiments, the column 21 is vertically installed on the foundation 10 as the ground, and the third direction Z is consistent with the length direction of the column 21, which is a vertical direction perpendicular to the foundation 10. In other embodiments, the column 21 is horizontally installed on the wall as the foundation 10, and the third direction Z is consistent with the length direction of the column 21, which is a horizontal direction perpendicular to the foundation 10.

[0058] Please combine Figure 5 and Figure 6 The column foot connection structure includes a connection body 100 and a connection bracket 200. The connection body 100 is used to be fixedly installed in the foundation 10. The connection body 100 has a fixing groove 101. At least one end of the fixing groove 101 has a first opening 102, so that the fixing plate 22 can enter the fixing groove 101 through the first opening 102. In other words, both ends of the fixing groove 101 can have the first opening 102, or one end can have the first opening 102 and the other end can be closed.

[0059] The connecting bracket 200 is detachably mounted on the connecting body 100. It should be noted that there are many ways to detachably mount the connecting bracket 200. For example, the connecting bracket 200 can be directly detachably mounted on the connecting body 100. For example, the connecting brackets 200 can be detachably connected to each other and mounted on the connecting body 100. For another example, the connecting bracket 200 is mounted on the connecting body 100 through other connecting members, which is not the only limitation made here. The connecting bracket 200 at least blocks part of the first opening 102 to prevent the fixing plate 22 from leaving the fixing groove 101 through the first opening 102. In other words, the connecting bracket 200 can block the entire first opening 102, or it can block a partial area of ​​the first opening 102, as long as it can prevent the fixing plate 22 from passing through the first opening 102, so as to achieve that the fixing plate 22 is stably limited in the fixing groove 101.

[0060] In the column foot connection structure provided in this embodiment, the connection body 100 is fixedly installed on the foundation 10, and the connection body 100 has a fixing groove 101 and a first opening 102 connected to the fixing groove 101. The fixing plate 22 of the support structure 20 enters the fixing groove 101 through the first opening 102. The connection bracket 200 is fixedly installed and at least partially blocks the first opening 102, so that the fixing plate 22 is stably located in the fixing groove 101, and the support structure 20 is installed on the foundation 10. After the connection bracket 200 is disassembled, the fixing plate 22 can leave the fixing groove 101 through the first opening 102, so that the support structure 20 is detachable and reusable. In addition, the support structure 20 is only contacted and connected with the fixing groove 101, and there is no need to open a connection hole position, which does not destroy the structure and strength of the fixing plate 22. The fixing plate 22 will not be damaged by the load yielding due to the opening of the connection hole position, which ensures the integrity of the support structure 20, so that the support structure 20 can be reused, and the support structure 20 can be detachable and reusable, reducing the waste of building resources.

[0061] When the supporting structure 20 is subjected to pressure, the pressure is transmitted to the foundation 10 through the fixing plate 22, the groove wall of the fixing groove 101 on the side away from the column 21, and the connecting body 100. The connecting body 100 and the foundation 10 have strong bearing capacity. Under this force mode, it is difficult for the column foot connection structure to undergo plastic deformation. Even if the column foot connection structure undergoes plastic deformation, it will not affect the repeated use of the supporting structure 20. When the supporting structure 20 is subjected to tension, the tensile force is transmitted to the foundation 10 through the fixing plate 22, the groove wall of the fixing groove 101 on the side close to the column 21 (large contact area), and the connecting body 100. The connecting body 100 and the foundation 10 have strong bearing capacity. Under this force mode, it is difficult for the column foot connection structure to undergo plastic deformation. Even if it occurs, it will not affect the repeated use of the supporting structure 20. When the supporting structure 20 is subjected to shear force, the shear force is transmitted to the foundation 10 through the fixing plate 22, the connecting bracket 200, and the connecting body 100, and the connecting body 100 and the foundation 10 have strong bearing capacity and will not undergo plastic deformation, and even if they fail, it will not affect the reuse of the supporting structure 20. It should be noted that the shear force acting directly on the bolts may cause the bolts to yield, but for the column foot connection structure provided in the present application, when the shear force is transmitted through the fixing plate 22 and the connecting bracket 200, the two are not directly bolted, not in point contact, so that the stress is dispersed, which greatly reduces the possibility of subsequent yield deformation, and will not cause stress concentration on the supporting structure 20, further improving the reusability of the supporting structure 20.

[0062] In some embodiments, in combination Figures 2 to 4The connecting brackets 200 are used in pairs, and the pair of connecting brackets 200 are respectively located at the two ends of the connecting body 100 and are detachably connected. In the pair of connecting brackets 200, one connecting bracket 200 is located at one end of the connecting body 100, and the other connecting bracket 200 is located at the other end of the connecting body 100. The two connecting brackets 200 are folded and spliced ​​to achieve sleeve fixing on the connecting body 100. The connecting brackets 200 and the connecting body 100 achieve force transmission through surface contact. Fasteners are not used to avoid fasteners and connection holes to reduce the overall yield strength, and welding or bonding is not used to avoid connection defects, and they are not detachable.

[0063] In this way, the connecting bracket 200 is installed on the connecting body 100 through a mutually detachable connection, and no connection point is set between the connecting bracket 200 and the connecting body 100, but force transmission is achieved through surface contact, thereby avoiding the opening of holes on the connecting bracket 200 and the connecting body 100 to cause the yield strength of the connecting bracket 200 and the connecting body 100 to decrease, and also avoiding the reduction of the yield strength of the entire column base connection structure due to the yield strength of the connection point, thereby indirectly improving the yield strength and service life of the column base connection structure.

[0064] exist Figure 2 , Figure 3 and Figure 7 In the illustrated embodiment, the fixing groove 101 extends along the first direction X, and the fixing groove 101 has first openings 102 at both ends of the first direction X. The length direction of the fixing groove 101 is consistent with the first direction X, and the width of the fixing groove 101 is consistent with the second direction Y. A pair of connecting brackets 200 are sleeved and connected to the connecting body 100 facing each other along the first direction X, and cover at least part of the first opening 102, and then the pair of connecting brackets 200 are detachably connected to each other to prevent the fixing plate 22 located in the fixing groove 101 from sliding out of the fixing groove 101 through the first opening 102.

[0065] It can be understood that in other embodiments, the fixing groove 101 has a first opening 102 at one end in the first direction X and is closed at the other end, and a pair of connecting brackets 200 are connected to the connecting body 100 facing each other along the first direction X, one of the connecting brackets 200 is close to the first opening 102 and at least partially blocks the first opening 102, and the other connecting bracket 200 is close to the closed end of the fixing groove 101.

[0066] Specifically, the number of the connecting brackets 200 is two, three, or more than three. Figure 2 and Figure 7In the illustrated embodiment, there are four connecting brackets 200, which are divided into two pairs. Each pair of connecting brackets 200 is detachably connected by being closed along a first direction X. The two pairs of connecting brackets 200 are spaced apart along a second direction Y and are respectively located on opposite sides of the column 21, thereby increasing the contact area and force transmission area between the connecting bracket 200 and the fixing plate 22, thereby dispersing the stress borne by the connecting bracket 200 and improving the service life of the column foot connection structure.

[0067] It can be understood that in other embodiments, the number of the connection brackets 200 may be one pair, three pairs, or more than three pairs. Alternatively, the number of the connection brackets 200 may be three, the first connection bracket 200 is located at one end of the connection body 100, the second connection bracket 200 and the third connection bracket 200 are spaced apart along the second direction Y, located at the other end of the connection body 100, and are detachably connected to the first connection bracket 200 respectively.

[0068] Specifically, combined Figure 2 , Figure 3 and Figure 7 The connecting bracket 200 includes a connecting plate 210, which is substantially perpendicular to the extending direction of the fixing groove 101. For example, the angle between the connecting plate 210 and the extending direction of the fixing groove 101 is 80° to 100°. Figure 2 and Figure 7 In a possible embodiment shown, the angle between the connecting plate 210 and the extension direction (first direction X) of the fixing groove 101 is 90°. The connecting plate 210 has a connecting hole 211, and the connecting hole 211 is used for fasteners to pass through to detachably connect a pair of connecting brackets 200. Since the connection point is prone to stress concentration, it is the weak point of the strength of the entire column foot connection structure, and the strength limit of the connection point affects the strength limit of the entire column foot connection structure. When the supporting structure 20 is subjected to pressure or tension in the first direction X, the pressure and tension are roughly perpendicular to the connecting plate 210, will not be transmitted to the connecting plate 210, and will not cause the fasteners passing through the connecting hole 211 to fail. When the supporting structure 20 is subjected to the shear force caused by bending, firstly, this stress situation rarely occurs during use, and secondly, the shear force is first transmitted to the part of the structure of the connecting bracket 200 that blocks the first opening 102, and then gradually dispersed and reduced during the transmission process. Therefore, even if the shear force caused by bending is transmitted to the fasteners penetrated in the connecting hole 211, the shear force is insufficient to reach the tensile yield strength of the fasteners at this time, further improving the service life of the column foot connection structure under complex extreme load environments. Furthermore, even if the connecting bracket 200 fails plastically, there is no hard connection between the connecting bracket 200 and the supporting structure 20, and the reaction will not cause the supporting structure 20 to deform and fail, and will not affect the repeated use of the supporting structure 20.

[0069] Among them, compared with the column base connection structure in the prior art, the column base connection structure provided by the present application reduces the use of fasteners, avoiding structural plastic deformation failure caused by the yielding of fasteners. Moreover, the connection object, connection position and connection direction of the fasteners are changed, which greatly reduces the stress condition of the fasteners and further reduces the possibility of yielding of the fasteners. Moreover, the fasteners are not directly connected to the supporting structure 20. Even if the fasteners yield, it will not cause plastic failure of the supporting structure 20 and will not affect the reuse of the supporting structure 20.

[0070] Specifically, the pair of connection brackets 200 are in planar contact through the connection plate 210 , which is beneficial to force dispersion, avoids stress concentration, and further improves the yield limit of the connection bracket 200 .

[0071] Optionally, the connecting plate 210 has one or more connecting holes 211. Figure 8 In the illustrated embodiment, the connecting plate 210 has a connecting hole 211, which reduces the use of fasteners and the number of times the fasteners are disassembled and assembled, thereby greatly improving assembly efficiency. Figure 7 In the illustrated embodiment, the connection plate 210 has three connection holes 211 , thereby dispersing the stress on the connection plate 210 and improving the connection strength between the connection brackets 200 .

[0072] In some embodiments, in combination Figure 2 , Figure 5 , Figure 7 and Fig.10 The connecting body 100 includes a first pressing member 110 and a second pressing member 120 which are arranged at intervals, and the interval between the first pressing member 110 and the second pressing member 120 forms a fixing groove 101. The connecting bracket 200 has a receiving groove 201, and one side of the receiving groove 201 has a second opening 202. The receiving groove 201 sleeves the first pressing member 110 and the second pressing member 120 through the second opening 202. In this way, the connecting bracket 200 is installed on the connecting body 100 in a sleeve manner, that is, no hole is required between the connecting bracket 200 and the connecting body 100, and it is convenient for detachable connection, thereby improving the disassembly efficiency and structural strength.

[0073] Specifically, combined Figure 6 and Fig.11 The first pressing member 110 has a first plane 111 on one side close to the second pressing member 120, and the first plane 111 is used to fit and contact with the top surface of the fixing plate 22. The fitting contact increases the force transmission area between the first pressing member 110 and the fixing plate 22, which is conducive to dispersing stress, thereby improving the force conditions of the fixing plate 22 and the first pressing member 110, and further increasing the yield limit of the two.

[0074] Optionally, the first pressing member 110 is a plate member, and both side surfaces of the plate member are planes, so there is no need to process the first plane 111, which simplifies the manufacturing process of the first pressing member 110 and facilitates the fitting contact with the fixing plate 22. In other embodiments, the surface contact between the first pressing member 110 and the fixing plate 22 can be a curved surface contact, so as to facilitate the positioning and matching of the two, and the curved surface contact area is larger than the flat surface contact area, and the curved surface contact is conducive to force transmission in various directions and can bear force transmission in different directions.

[0075] Specifically, combined Figure 6 and Fig.11 The second pressing member 120 has a second plane 121 on one side close to the first pressing member 110, and the second plane 121 is used to fit and contact with the bottom surface of the fixing plate 22. The fitting contact increases the force transmission area between the second pressing member 120 and the fixing plate 22, which is conducive to dispersing stress, thereby improving the force conditions of the fixing plate 22 and the second pressing member 120, and further increasing the yield limit of the two.

[0076] Optionally, the second pressing member 120 is a plate member, and both side surfaces of the plate member are planes, so there is no need to process the second plane 121, which simplifies the manufacturing process of the second pressing member 120 and facilitates the fitting contact with the fixing plate 22. In other embodiments, the surface contact between the second pressing member 120 and the fixing plate 22 can be a curved surface contact, so as to facilitate the positioning and matching of the two, and the curved surface contact area is larger than the flat surface contact area, and the curved surface contact is conducive to force transmission in various directions and can bear force transmission in different directions.

[0077] Specifically, combined Figure 4 The side of the receiving groove 201 opposite to the second opening 202 has a third plane 203, and the third plane 203 is used to fit and contact with the side of the fixing plate 22. The fitting contact increases the force transmission area between the connecting bracket 200 and the fixing plate 22, which is conducive to dispersing stress, thereby improving the force conditions of the fixing plate 22 and the connecting bracket 200, and further increasing the yield limit of the two.

[0078] Optionally, the side of the receiving groove 201 is a plate, and both side surfaces of the plate are planes, so there is no need to process the third plane 203, which simplifies the processing technology of the receiving groove 201 and facilitates the fitting contact with the fixing plate 22. In other embodiments, the surface contact between the fixing plate 22 and the side of the receiving groove 201 can be a curved surface contact, so as to facilitate the positioning and matching of the two, and the curved surface contact area is larger than the flat surface contact area, and the curved surface contact is conducive to force transmission in various directions and can bear force transmission in different directions.

[0079] In one embodiment, in combination Figure 2 and Figure 7, the bottom of the connecting body 100 is used to be fixedly installed in the foundation 10, and the top of the connecting body 100 has a fixing groove 101. In other words, in the third direction Z, one end of the connecting body 100 is fixedly installed on the foundation 10, and the other end of the connecting body 100 is used to fix the supporting structure 20, so as to make full use of the size space of the connecting body 100 in the third direction Z, so as to facilitate the miniaturization design of the connecting body 100. The top of the fixing groove 101 has a third opening 103, and the third opening 103 is used to allow the column 21 to be exposed from the connecting body 100. In this way, the fixing plate 22 is fully supported in the fixing groove 101 as a whole, and the column 21 is connected to the middle part of the fixing plate 22. The setting of the third opening 103 does not affect the extension of the column 21 in the third direction Z, and the operator can adjust the position of the fixing plate 22 in the fixing groove 101 through the column 21.

[0080] In one embodiment, in combination Figure 2 , Figure 6 and Fig. 9 , the interval h between the bottom of the connecting body 100 and the bottom of the connecting bracket 200 is 75mm to 125mm. When in use, the bottom of the connecting bracket 200 is attached to the foundation 10, that is, the interval h between the bottom of the connecting body 100 and the bottom of the connecting bracket 200 is the buried depth of the column foot connection structure. When the interval h is less than 75mm, the bonding force between the connecting body 100 and the foundation 10 is limited, and the yield limit of the column foot connection structure needs to be further improved. As the interval h increases, the yield strength of the column foot connection structure increases. When the interval h is greater than 125mm, the yield strength of the column foot connection structure is difficult to continue to increase. Therefore, the effect of continuing to increase the interval h is limited and is not conducive to the lightweight design of the column foot connection structure.

[0081] For example, in the finite element analysis software ABAQUS, Figure 7 As shown in the modeling, the 8-node unit of C3D8R is used to divide the grid, and the grid size of the column 21 varies from 35mm at the top to 15mm at the bottom. The grid size of the fixed plate 22 and the column base connection structure uses a 15mm grid size, and the concrete footing uses a 40mm grid size. The "hard" contact model in the normal direction is used to define the surface-to-surface contact between the fixed plate 22 and the groove wall of the fixed groove 101. The procedure used is the "static normal" procedure. The boundary conditions at the bottom of the foundation 10 and the connection body 100 are fixed. The thickness t of the connection body 100 and the connection bracket 200 is 25mm. The stress curves corresponding to different intervals h are simulated respectively. The results are shown as follows Fig.15 shown. Fig.15The horizontal axis represents the deformation of the column base connection structure, and the vertical axis represents the tensile force borne by the supporting structure 20. When the interval h is 25mm and 50mm, the column base connection structure undergoes irreversible plastic deformation when the deformation is less than 20mm, that is, both the supporting structure 20 and the column base connection structure are damaged and cannot be reused. When the interval h is 75mm, the column base connection structure does not undergo irreversible plastic deformation after the deformation exceeds 40mm under the action of a tensile force close to 100kN, thereby improving the displacement limit life of the supporting structure 20 and the column base connection structure. When the interval h is 125mm, the column base connection structure does not undergo plastic deformation after the deformation exceeds 60mm, and its curve is similar to the curve corresponding to the interval h of 75mm. It can be concluded that continuing to increase the interval h has little significance in improving the displacement limit.

[0082] In one embodiment, in combination Figure 2 , Figure 6 and Fig. 9 , the thickness t of the connection body 100 is 25 mm to 50 mm. When the thickness t of the connection body 100 is less than 25 mm, the yield strength of the connection body 100 is limited and needs to be further improved. Fig.16 The horizontal axis represents the deformation of the column base connection structure, and the vertical axis represents the bending moment borne by the support structure 20. Fig.16 , the strain curve corresponding to the thickness t = 25mm is obviously better than the strain curve corresponding to the thickness t = 12mm, that is, as the thickness t increases, the yield strength of the column base connection structure increases, and the load capacity gradually increases. In addition, when the thickness t is greater than 50mm, the yield strength of the column base connection structure is difficult to continue to increase, and it is not conducive to the lightweight design of the column base connection structure.

[0083] For example, in the finite element analysis software ABAQUS, Figure 7 As shown in the modeling, the 8-node unit of C3D8R is used to divide the grid, and the grid size of the column 21 varies from 35mm at the top to 15mm at the bottom. The grid size of the fixed plate 22 and the column base connection structure uses a 15mm grid size, and the concrete footing uses a 40mm grid size. The "hard" contact model in the normal direction is used to define the surface-to-surface contact between the fixed plate 22 and the groove wall of the fixed groove 101. The steps used are "static normal" steps. The boundary conditions of the foundation 10 and the bottom of the connection body 100 are fixed. The buried depth of the connection body 100 is 75mm, and the stress conditions of different thicknesses t are simulated respectively. The results are as follows Fig.17 See Fig.17 (a), when the thickness t is 12 mm, the limit occurs at the top of the connecting body 100 and the fixing plate 22, causing the column foot connection structure to be damaged and the supporting structure 20 to tilt, which may cause it to be unreusable. Fig.17(b) When the thickness t is 25 mm, the limit occurs at the bottom of the connecting body 100, and the fixing plate 22 is intact, which does not affect the reuse of the supporting structure 20.

[0084] In one embodiment, in combination Figure 5 , Fig.10 and Fig.11 The connection body 100 includes an insertion plate 130 and an embedding plate 140. The insertion plate 130 is used to be inserted in the foundation 10. The embedding plate 140 is substantially vertically arranged on the insertion plate 130. The embedding plate 140 is used to be embedded in the foundation 10. The arrangement of the embedding plate 140 can increase the contact area between the connection body 100 and the foundation 10, thereby increasing the bonding force between the connection body 100 and the foundation 10.

[0085] In one embodiment, in combination Fig.10 and Fig.11 The connection body 100 is integrally formed, so that there is no connection stress and connection defect inside the connection body 100, and the overall strength is good.

[0086] In one embodiment, in combination Figure 5 and Figure 6 The connecting body 100 includes a plug-in plate 130, an embedded plate 140, a first plate 150 and a second plate 160. The embedded plate 140 and the first plate 150 are respectively connected to the plug-in plate 130 approximately vertically and spaced apart. The number of the plug-in plates 130, the embedded plate 140 and the first plate 150 are two and one-to-one corresponding. The two plug-in plates 130 are arranged at intervals. The second plate 160 is approximately vertically connected between the two plug-in plates 130. The second plate 160 is located between the first plate 150 and the embedded plate 140. A fixing groove 101 is formed between the first plate 150 and the second plate 160.

[0087] In this way, the connection body 100 is manufactured separately and then connected together, which is convenient for production and reduces production difficulty and production cost.

[0088] Combination Fig.12 and Fig.13 , the fixing plate 22 of the supporting structure 20 slides into the fixing groove 101 through the first opening 102, and then each pair of connecting brackets 200 are respectively closed and sleeved on the connecting body 100 from both sides of the fixing groove 101, and are detachably connected to each other, covering part of the first opening 102, so as to realize the installation of the supporting structure 20, such as Figure 8 and Fig. 9 shown.

[0089] In one embodiment, the connection body 100 is designed to be elastic, which can improve its deformation ability, avoid irreversible plastic deformation, and facilitate repeated use.

[0090] In addition, the connection body 100 can alleviate and disperse the load through a certain degree of deformation and displacement, so that the strain distribution is more uniform.

[0091] Combination Figure 2 , Figure 7 and Fig.14 The present application provides a pile foundation device. The pile foundation device includes a foundation 10, a supporting structure 20 and any one of the above-mentioned column foot connection structures, wherein a connection body 100 is fixedly installed in the foundation 10, and the supporting structure 20 includes a column 21 and a fixing plate 22 fixed to the bottom of the column 21, and the fixing plate 22 is located in a fixing groove 101.

[0092] Optionally, the column 21 is a steel structure column, a copper structure column, an aluminum structure column, a concrete column or a wooden pile, which is not limited here.

[0093] Optionally, the cross section of the column 21, ie, the cross section perpendicular to the third direction Z, is I-shaped, polygonal, circular, elliptical or irregular, which is not limited here.

[0094] In one embodiment, in combination Figure 2 and Fig.14 The foundation 10 is provided with an installation groove 11, and the installation groove 11 is used to fill concrete. The connection body 100 is partially located in the installation groove 11, and the fixing groove 101 is exposed at the top of the installation groove 11.

[0095] In one embodiment, in combination Figure 7 The base 10 has a fixing protrusion 12 , the connecting body 100 is sleeved on the fixing protrusion 12 , and the fixing groove 101 is located at the top of the fixing protrusion 12 .

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A column foot connection structure, used for installing a supporting structure in a foundation, the supporting structure comprises a column and a fixing plate fixed to the bottom of the column, characterized in that: The column foot connection structure comprises: A connecting body, the connecting body is used for being fixedly installed in the foundation, the connecting body has a fixing groove, at least one end of the fixing groove has a first opening, so that the fixing plate can enter the fixing groove through the first opening; A connecting bracket is detachably mounted on the connecting body, and the connecting bracket at least partially blocks the first opening to prevent the fixing plate from leaving the fixing groove through the first opening.

2. The column foot connection structure according to claim 1, characterized in that: The connecting brackets are used in pairs, and a pair of the connecting brackets are respectively located at two ends of the connecting body and are detachably connected.

3. The column foot connection structure according to claim 2, characterized in that: The connecting bracket comprises a connecting plate, which is substantially perpendicular to the extending direction of the fixing slot. The connecting plate has a connecting hole, and the connecting hole is used for fasteners to pass through so as to detachably connect a pair of the connecting brackets.

4. The column foot connection structure according to claim 1, characterized in that: The connecting body includes a first clamping member and a second clamping member arranged at an interval, the interval between the first clamping member and the second clamping member forms the fixing groove, the connecting bracket has a receiving groove, one side of the receiving groove has a second opening, and the receiving groove is connected to the first clamping member and the second clamping member through the second opening.

5. The column foot connection structure according to claim 4, characterized in that: The first pressing member has a first plane on one side close to the second pressing member, and the first plane is used to be in close contact with the top surface of the fixing plate; The second pressing member has a second plane on one side close to the first pressing member, and the second plane is used to be in close contact with the bottom surface of the fixing plate; A side of the accommodating groove opposite to the second opening has a third plane, and the third plane is used to fit and contact with the side surface of the fixing plate.

6. The column foot connection structure according to claim 1, characterized in that: The bottom of the connecting body is used for being fixedly installed in the foundation, the top of the connecting body is provided with the fixing groove, the top of the fixing groove is provided with a third opening, and the third opening is used for allowing the column to be exposed from the connecting body.

7. The column foot connection structure according to claim 6, characterized in that: The interval between the bottom of the connecting body and the bottom of the connecting bracket is 75 mm to 125 mm; And / or, the thickness of the connecting body is 25 mm to 50 mm.

8. The column foot connection structure according to claim 6, characterized in that: The connection body includes an insertion plate and an embedded plate, wherein the insertion plate is used to be inserted in the foundation, and the embedded plate is substantially vertically arranged on the insertion plate, and the embedded plate is used to be embedded in the foundation.

9. The column foot connection structure according to claim 1, characterized in that: The connecting body is integrally formed.

10. The column foot connection structure according to claim 1, characterized in that: The connecting body includes a plug-in plate, an embedded plate, a first plate member and a second plate member. The embedded plate and the first plate member are respectively connected to the plug-in plate approximately vertically and spaced apart. The number of the plug-in plate, the embedded plate and the first plate member are two and they correspond one to one. The two plug-in plates are arranged at intervals. The second plate member is approximately vertically connected between the two plug-in plates. The second plate member is located between the first plate member and the embedded plate. The first plate member and the second plate member are spaced apart to form the fixing groove.

11. The column base connection structure according to any one of claims 1 to 10, characterized in that: The connecting body is designed to be elastic.

12. A pile foundation device, characterized in that: The pile foundation device includes a foundation, a supporting structure and a column base connection structure according to any one of claims 1 to 11, the connection body is fixedly installed in the foundation, the supporting structure includes a column and a fixing plate fixed to the bottom of the column, and the fixing plate is located in the fixing groove.

13. The pile foundation device according to claim 12, characterized in that: The foundation is provided with an installation groove, the installation groove is used to fill concrete, the connecting body part is located in the installation groove, and the fixing groove is exposed at the top of the installation groove.

14. The pile foundation device according to claim 12, characterized in that: The base has a fixing protrusion, the connecting body is sleeved on the fixing protrusion, and the fixing groove is located on the top of the fixing protrusion.

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