Installation method for arranging steel stand column in pile

Abstract

The invention discloses an installation method for a steel stand column arranged in a pile. The installation method comprises the following steps that S1, pile hole construction is conducted; s2, a reinforcement cage is arranged downwards; s3, the placement position of the stand column guide frame is marked on the pile casing; s4, the construction mode of the H-shaped steel stand column is selected according to the section number of the H-shaped steel stand column preset in the pile, the construction mode comprises a first insertion method or a second insertion method, and S5, multiple sections of H-shaped steel are sequentially put down and implanted according to the design requirement, the multiple sections of H-shaped steel stand columns are connected, and concrete is poured into a pile hole; s6, concrete is poured into the pile holes, and H-shaped steel stand columns are implanted; s7, after the concrete has certain strength, the directional frame is dismantled; and S8, the empty hole is filled back to the ground elevation. According to the method, different construction technologies are determined according to different construction working conditions, by strictly controlling the construction process and flow, the standardization of construction is ensured, the safety of the construction process is enhanced, and operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering construction, and in particular to an installation method of a steel column arranged inside a pile. Background Art

[0002] Steel columns are usually installed in cast-in-place piles. The upper part is a column and the lower part is a pile. They are used for vertical support in foundation pit support with a relatively large span. They can be used as support to bear the deadweight of the structure and construction loads before the bottom plate is sealed during reverse construction. The function of the steel column is to ensure the longitudinal stability of the horizontal support, strengthen the spatial rigidity of the support system and bear the vertical load transmitted from the horizontal support. It is required to have good self-rigidity and small vertical displacement.

[0003] Some of the steel columns in the piles are designed with H-shaped steel. For their installation, the specifications stipulate that the deviation of the axis of the structural column should be controlled within ±5mm, and the verticality should be controlled within 1 / 500, otherwise the load-bearing and architectural aesthetics will be affected. Therefore, when installing the steel columns in the piles, it is necessary to accurately determine their vertical and horizontal positions, and at the same time ensure the verticality during the installation process. Deformations such as movement and torsion should be avoided to ensure that the column installation meets the accuracy requirements. At the same time, the steel columns should have stable support before the concrete forms sufficient strength. For steel columns with longer lengths, they are divided into multiple sections for installation. For steel columns with multiple sections, orifice connections are required, and reliable connection methods should be adopted for connection. Orifice connection takes a long time, and the problems of pouring concrete and steel column installation need to be properly handled to avoid the problem that the column cannot be embedded in the concrete after the concrete pouring is completed.

[0004] There is generally no standardized construction process and tools for installing steel columns in piles. In order to ensure the smooth implementation of the installation of steel columns in piles and meet the quality requirements, a method for installing steel columns in piles is proposed to solve this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a method for installing a steel column in a pile to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a method for installing a steel column in a pile, comprising the following steps:

[0007] S1, pile hole construction, set up casing under the pile position, and drill the hole according to the design requirements;

[0008] S2, placing a steel cage in the casing;

[0009] S3, using a total station to mark the placement position of the column guide frame on the top of the casing;

[0010] S4, selecting a construction method of the H-shaped steel column according to the number of sections of the H-shaped steel column preset in the pile, the construction method includes a first insertion method or a second insertion method, if the first insertion method is adopted, steps S5, S7-S8 are implemented,

[0011] If the post-interpolation rule is used to implement steps S6-S8,

[0012] S5, using the first insertion method, fix the column installation guide frame at the marked position on the top of the casing, symmetrically weld the column positioning support plates at the preset height on both sides of the H-shaped steel column, and sequentially lower and implant multiple sections of H-shaped steel columns according to the design requirements. Use connecting plates and bolts to connect multiple sections of H-shaped steel columns, and use the extended column to lower the last section of the H-shaped steel column to the designed elevation; set up a guide tube, pour concrete in the pile hole, and remove the guide tube after the pouring is completed;

[0013] S6, adopt the post-insertion method, set up a guide tube, pour concrete in the pile hole, and remove the guide tube after the pouring is completed; weld the column installation guide frame to the preset position of the casing, symmetrically weld the column positioning support plates at the preset height on both sides of the H-shaped steel column, implant the H-shaped steel column, and fix the column installation guide frame and the positioning support plate;

[0014] S7, after the concrete has a certain strength, the guide frame is removed;

[0015] S8, backfill the empty hole to the ground level and remove the casing.

[0016] According to the installation method of the steel column in the pile provided by the present invention, in S5, the implantation process of the multi-section H-shaped steel column includes the following steps:

[0017] S51, hoist the first section of the H-shaped steel column to the top of the casing, and lower the H-shaped steel column until the column positioning support plate of the side wall abuts against the top surface of the column installation guide frame;

[0018] S52, hoist the second section of the H-shaped steel column to the top of the first section of the H-shaped steel column, lower the second section of the H-shaped steel column, and connect the second section of the H-shaped steel column with the first section of the H-shaped steel column, cut off the positioning support plate on the first section of the H-shaped steel column, lower the first section of the H-shaped steel column until the positioning support plate on the second section of the H-shaped steel column abuts against the column installation guide frame, repeat the operation to sequentially implant multiple sections of the H-shaped steel column into the casing until the penultimate section of the H-shaped steel column;

[0019] S53, welding a positioning support plate on the extended column, connecting the last section of the H-shaped steel column with the extended column and then hoisting them above the casing, and connecting the last section of the H-shaped steel column with the penultimate section of the H-shaped steel column;

[0020] S54, a guide tube is provided below, concrete is poured into the casing, and the guide tube is removed after the pouring is completed;

[0021] S55: After the concrete solidifies, remove the column installation guide frame and extend the column to complete the implantation of multiple H-shaped steel columns.

[0022] According to the installation method of steel columns in piles provided by the present invention, in S52, the webs of adjacent H-shaped steel columns are fixed by connecting plates and bolts, and the flanges are connected by flange plates and bolts.

[0023] According to the method for installing a steel column in a pile provided by the present invention, in S53, a connecting device is installed on the extended column, and the extended column is connected to the last section of the H-shaped steel column through the connecting device.

[0024] According to the installation method of the steel column in the pile provided by the present invention, in S53, the length of the extended column above the guide frame is calculated based on the top elevation of the required lower column, the top elevation of the guide frame and the length of the extended column, so as to determine the welding height of the positioning support plate on the extended column.

[0025] According to the installation method of steel columns in piles provided by the present invention, after the H-shaped steel columns in S5 and S6 are implanted, it is necessary to use a total station to verify the position deviation of the H-shaped steel columns, and use a level to check the verticality of the H-shaped steel columns. After meeting the position deviation and verticality requirements, the positioning support plate is fixed to the column installation guide frame.

[0026] According to the installation method of steel columns in piles provided by the present invention, in S3, according to the design drawings, the positioning coordinates of the required H-shaped steel columns are marked in the CAD plan view, including the coordinates of the intersection of the web centerline and the casing and the coordinates of the intersection of the two flange directions of the H-shaped steel column and the casing. The total station straight line layout method is used to measure and mark the positioning coordinates on the casing, thereby determining the placement position of the column guide frame.

[0027] According to the installation method of the steel column in the pile provided by the present invention, the bottom section of the H-shaped steel column uses steel bars to connect the rivets on the column to form a protective surface, and the bottom is welded with a V-shaped tip with steel bars.

[0028] The present invention discloses the following technical effects:

[0029] High flexibility: The present invention provides two construction methods, namely, pre-insertion method and post-insertion method, and can be flexibly adjusted according to the number of sections of the H-shaped steel columns preset in the pile, thereby adapting to different engineering requirements and improving the flexibility and applicability of the construction.

[0030] Accurate positioning: The present invention utilizes a total station to accurately mark the placement position of the column guide frame, thereby ensuring the accuracy of column installation. At the same time, through the symmetrical welding of the column positioning support plate, the position of the H-shaped steel column is further stabilized, thereby improving the accuracy and stability of installation.

[0031] Reliable connection: The connection plates and bolts are used to connect multiple H-shaped steel columns, which not only has high connection strength, but also is easy to disassemble and reuse, reducing construction costs. In addition, the last section of the H-shaped steel column is lowered to the designed elevation using the extended column, ensuring the integrity and continuity of the column.

[0032] High construction efficiency: Through reasonable arrangement of construction steps, the construction efficiency is significantly improved and the construction period is shortened.

[0033] Strong environmental adaptability: The present invention is suitable for pile hole construction under different geological conditions. By adjusting construction parameters and measures, it can overcome the influence of complex geological environment on construction and ensure the smooth progress of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments 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 work.

[0035] Figure 1 It is a schematic diagram of the structure of the protective layer of the present invention;

[0036] Figure 2 It is a schematic diagram of the matching relationship between the pre-connection auxiliary device and the flange plate of the present invention;

[0037] Figure 3 It is a schematic diagram of the matching relationship between the column guide frame and the positioning support plate of the present invention;

[0038] Figure 4 It is a front view of the connecting device of the present invention;

[0039] Figure 5 is a top view of the connecting device of the present invention;

[0040] Figure 6 It is a bottom view of the connecting device of the present invention.

[0041] Among them, 1. protective layer; 2. rivet; 3. rotating rod; 4. extending column; 5. pin; 6. connecting port; 7. prism; 8. column guide frame; 9. positioning support plate; 10. fixed axis; 11. transmission rod; 12. connecting plate; 13. flange plate; 14. pre-connection auxiliary device; 15. bolt; 16. hanging point. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figure 1-Figure 6 The present invention provides a method for installing a steel column in a pile, comprising the following steps:

[0045] S1, pile hole construction, set up casing under the pile position, and drill the hole according to the design requirements;

[0046] S2, with steel cage underneath;

[0047] S3, using a total station to mark the placement position of the column guide frame 8 on the top of the casing;

[0048] S4, selecting a construction method of the H-shaped steel column according to the number of sections of the H-shaped steel column preset in the pile, the construction method includes a first insertion method or a second insertion method, if the first insertion method is adopted, steps S5, S7-S8 are implemented,

[0049] If the post-interpolation rule is used to implement steps S6-S8,

[0050] S5, using the first insertion method, fix the column installation guide frame at the marked position on the top of the casing, symmetrically weld the column positioning support plate 9 at the preset height on both sides of the H-shaped steel column, and sequentially lower and implant multiple sections of H-shaped steel according to the design requirements, use the connecting plate 12 and the bolt 15 to connect the multiple sections of H-shaped steel columns, and use the extension column 4 to lower the last section of the H-shaped steel column to the designed elevation; set a guide tube, pour concrete in the pile hole, and remove the guide tube after the pouring is completed;

[0051] S6, adopt the post-insertion method, set up a guide tube, pour concrete in the pile hole, and remove the guide tube after the pouring is completed; weld the column installation guide frame to the preset position of the casing, symmetrically weld the column positioning support plate 9 at the preset height on both sides of the H-shaped steel column, implant the H-shaped steel column, and fix the column installation guide frame and the positioning support plate 9;

[0052] S7, after the concrete has a certain strength, the guide frame is removed;

[0053] S8, backfill the empty hole to the ground level and remove the casing.

[0054] Further optimizing the scheme, in S5, the implantation process of the multi-section H-shaped steel column includes the following steps:

[0055] S51, hoist the first section of the H-shaped steel column to the top of the casing, and lower the H-shaped steel column until the column positioning support plate 9 of the side wall abuts against the top surface of the column installation guide frame;

[0056] S52, hoist the second section of the H-shaped steel column to the top of the first section of the H-shaped steel column, lower the second section of the H-shaped steel column, and connect the second section of the H-shaped steel column with the first section of the H-shaped steel column, cut off the positioning support plate 9 on the first section of the H-shaped steel column, lower the first section of the H-shaped steel column until the positioning support plate 9 on the second section of the H-shaped steel column abuts against the column installation guide frame, repeat the operation to sequentially implant multiple sections of the H-shaped steel column into the casing until the penultimate section of the H-shaped steel column;

[0057] S53, welding a positioning support plate 9 on the extension column 4, connecting the last section of the H-shaped steel column with the extension column 4 and hoisting the column above the casing, and connecting the last section of the H-shaped steel column with the penultimate section of the H-shaped steel column;

[0058] S54, a guide tube is provided below, concrete is poured into the casing, and the guide tube is removed after the pouring is completed;

[0059] S55, after the concrete solidifies, the column installation guide frame and the extension column 4 are removed to complete the implantation of the multi-section H-shaped steel column.

[0060] According to a further optimization scheme, in S52, the webs of adjacent H-shaped steel columns are fixed by connecting plates 12 and bolts 15, and the flanges are connected by flange plates 13 and bolts 15.

[0061] According to a further optimization scheme, in S53, a connecting device is installed on the extension column 4, and the extension column 4 is connected to the last section of the H-shaped steel column through the connecting device.

[0062] To further optimize the solution, in S53, the length of the extended column 4 above the guide frame is calculated based on the top elevation of the required lower column, the top elevation of the guide frame and the length of the extended column 4, thereby determining the welding height of the positioning support plate 9 on the extended column 4.

[0063] To further optimize the solution, after the H-beam columns in S5 and S6 are implanted, the position deviation of the H-beam columns needs to be verified using a total station, and the verticality of the H-beam columns needs to be checked using a level ruler. After the position deviation and verticality requirements are met, the positioning support plate 9 is fixed to the column mounting guide frame.

[0064] To further optimize the solution, in S3, according to the design drawings, the positioning coordinates of the required H-shaped steel columns are marked in the CAD plan view, including the coordinates of the intersection of the web centerline and the casing and the coordinates of the intersection of the two flange directions of the H-shaped steel column and the casing. The total station straight line layout method is used to measure and mark the positioning coordinates on the casing, thereby determining the placement position of the column guide frame 8.

[0065] To further optimize the solution, the bottom section of the H-shaped steel column uses steel bars to connect the rivets 2 on the column to form a protective surface, and the bottom is welded with steel bars to form a V-shaped tip. After all the data are determined, the bottom of the H-shaped steel column and the position of the rivet 22 are first welded with a protective layer 1. The purpose is to prevent the H-shaped steel column from scratching the steel cage during the installation process of the pile hole, damaging the steel cage, and preventing the steel cage from being stuck and unable to be lowered normally.

[0066] Before installing the H-beam column, it is necessary to consult the design drawings of the H-beam column of the corresponding pile foundation to determine its basic information, such as thickness, height, width, length, number of sections, weight, top / bottom elevation of the H-beam column, size of flange plate 13, size of bolt 15, and position and direction in the pile hole. This information is used to determine whether to install the H-beam column first and then pour concrete or to pour concrete first and then install the H-beam column, that is, the "first insertion method" or the "later insertion method"; determine the crane counterweight and sling; whether to use the extension column 4; whether to weld the positioning support plate 9 on the steel body of the H-beam column, etc. After determining all the data, first weld the protective layer 1 on the bottom of the H-beam column and the position of the rivet 22, in order to prevent the H-beam column from scratching the steel cage and damaging the steel cage during the installation of the pile hole, and prevent the steel cage from being stuck and unable to be lowered normally. Subsequently, if multiple sections of H-shaped steel columns need to be lowered into their corresponding pile holes, the method of first installing the H-shaped steel columns and then pouring concrete must be used. Positioning support plates 9 are welded on both sides of the top of each section of the H-shaped steel column so that it can be mounted on the column guide frame 8 for hole connection. If the H-shaped steel column is too large, the corresponding flange plate 13 and bolt 15 will usually be too large. It is necessary to use a crane to use a sling to lift the first section of the H-shaped steel column through the lifting point 16 and lower it into the pile hole, and then place it on the column guide frame 8. Then, the flange plate 13 is lifted first to make it close to the pre-connection auxiliary device 14. After the flange plate 13 and the auxiliary device are stable on the ground, the next section of the H-shaped steel column is lifted so that the bolt 15 holes corresponding to the H-shaped steel column are close to the flange plate 13, and then the bolts 15 are passed through the flange plate 13 and the corresponding bolt 15 holes on the H-shaped steel column steel body. The structure and method on both sides of the H-shaped steel column steel body are the same. Only after the pre-connection is completed can it be lifted to the hole mouth and connected to the previous section, and each bolt 15 is tightened with a hand drill. After the connection is completed, the positioning support plate 9 is cut and welded, and the H-shaped steel column continues to be lowered to the pile hole. You can choose whether to use the extension column 4 according to the design elevation data of the H-shaped steel column. If it is not needed, the positioning support plate 9 must be welded to the specified positions on both sides of the last section of the H-shaped steel column after the elevation data is calculated, and the H-shaped steel column continues to be lowered and placed on the column guide frame 8; if the extension column 4 is needed, there is no need to weld the positioning support plate 9 to the steel body of the last section of the H-shaped steel column. The positioning support plate 9 must be welded to the specified positions on both sides of the extension column 4 after the elevation data is calculated. The last section of the H-shaped steel column is connected with the extension column 4. The device includes a rotating rod 3, a pin 5, a fixed shaft 10, and a transmission rod 11. The fixed shaft 10 is used to install the transmission rod 11. The rotating rod 3 drives the transmission rod 11 to rotate, that is, drives the pin 5 to rotate. The hole of the connecting plate 12 is aligned with the connecting port 6. The pin 5 of the extended column 4 is embedded in the connecting plate 12 and the connecting port 6 of the H-shaped steel column at the same time. After being combined into one, a crane and a lifting device are used to connect the lifting point 16 of the extended column 4 to lift it, and then it is lowered into the pile hole to continue to connect with the hole of the previous H-shaped steel column. After the connection is completed, the H-shaped steel column is continued to be lowered and placed on the column guide frame 8.The prism 7 is installed on the column guide frame 8. The position and direction of the H-shaped steel column are marked on the casing and the column guide frame 8 through the prism 7 and the total station. After the marking is completed, the column guide frame 8 is welded to the marked point of the casing, and the H-shaped steel column is fine-tuned on the marked point of the guide frame. After the marked point is aligned, the installation is completed.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for installing a steel column in a pile, characterized in that: The following steps are involved: S1, pile hole construction, set up casing under the pile position, and drill the hole according to the design requirements; S2, with steel cage underneath; S3, using a total station to mark the placement position of the column guide frame (8) on the top of the casing; S4, selecting a construction method of the H-shaped steel column according to the number of sections of the H-shaped steel column preset in the pile, the construction method includes a first insertion method or a second insertion method, if the first insertion method is adopted, steps S5, S7-S8 are implemented, If the post-interpolation rule is used to implement steps S6-S8, S5, using the first insertion method, fix the column installation guide frame at the marked position on the top of the casing, symmetrically weld the column positioning support plate (9) at the preset height on both sides of the H-shaped steel column, and sequentially lower and implant multiple sections of H-shaped steel columns according to the design requirements, use the connecting plate (12) and bolts (15) to connect the multiple sections of H-shaped steel columns, and use the extension column (4) to lower the last section of the H-shaped steel column to the designed elevation; set a guide tube, pour concrete in the pile hole, and remove the guide tube after the pouring is completed; S6, adopting the post-insertion method, setting a guide tube at the bottom, pouring concrete into the pile hole, and removing the guide tube after the pouring is completed; welding the column installation guide frame to the preset position of the casing, symmetrically welding the column positioning support plates (9) at the preset height on both sides of the H-shaped steel column, implanting the H-shaped steel column, and fixing the column installation guide frame and the positioning support plate (9); S7, after the concrete has a certain strength, the guide frame is removed; S8, backfill the empty hole to the ground level and remove the casing.

2. The method for installing a steel column in a pile according to claim 1, characterized in that: In S5, the implantation process of the multi-section H-shaped steel column includes the following steps: S51, hoisting the first section of the H-shaped steel column to the top of the casing, lowering the H-shaped steel column until the column positioning support plate (9) of the side wall abuts against the top surface of the column installation guide frame; S52, hoist the second section of the H-shaped steel column to the top of the first section of the H-shaped steel column, lower the second section of the H-shaped steel column, and connect the second section of the H-shaped steel column with the first section of the H-shaped steel column, cut off the positioning support plate (9) on the first section of the H-shaped steel column, lower the first section of the H-shaped steel column until the positioning support plate (9) on the second section of the H-shaped steel column abuts against the column installation guide frame, and repeat the operation to sequentially implant multiple sections of the H-shaped steel column into the casing until the second to last section of the H-shaped steel column is erected; S53, welding a positioning support plate (9) on the extension column (4), connecting the last section of the H-shaped steel column with the extension column (4), and hoisting the column above the casing, and connecting the last section of the H-shaped steel column with the penultimate section of the H-shaped steel column; S54, a guide tube is provided below, concrete is poured into the casing, and the guide tube is removed after the pouring is completed; S55, after the concrete solidifies, the column installation guide frame and the extended column (4) are removed to complete the implantation of the multi-section H-shaped steel column.

3. The method for installing a steel column in a pile according to claim 2, characterized in that: In S52, the webs of adjacent H-shaped steel columns are fixed by connecting plates (12) and bolts (15), and the flanges are connected by flange plates (13) and bolts (15).

4. The method for installing a steel column in a pile according to claim 2, characterized in that: In S53, a connecting device is installed on the extension column (4), and the extension column (4) is connected to the last section of the H-shaped steel column through the connecting device.

5. The method for installing a steel column in a pile according to claim 2, characterized in that: In S53, the length of the extended column (4) above the guide frame is calculated based on the top elevation of the required lower column, the top elevation of the guide frame and the length of the extended column (4), thereby determining the welding height of the positioning support plate (9) on the extended column (4).

6. The method for installing a steel column in a pile according to claim 1, characterized in that: After the H-shaped steel columns in S5 and S6 are implanted, the position deviation of the H-shaped steel columns needs to be checked using a total station, and the verticality of the H-shaped steel columns is checked using a level ruler. After the position deviation and verticality requirements are met, the positioning support plate (9) is fixed to the column installation guide frame.

7. The method for installing a steel column in a pile according to claim 1, characterized in that: In S3, according to the design drawings, the positioning coordinates of the required H-shaped steel columns are marked in the CAD plan view, including the coordinates of the intersection of the web centerline and the casing and the coordinates of the intersection of the two flange directions of the H-shaped steel columns and the casing. The total station straight line layout method is used to measure and mark the positioning coordinates on the casing, thereby determining the placement position of the column guide frame (8).

8. The method for installing a steel column in a pile according to claim 1, characterized in that: The bottom section of the H-shaped steel column uses steel bars to connect the rivets (2) on the column to form a protective surface, and the bottom is welded with steel bars to form a V-shaped tip.

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