Construction technology of pier column foundation structure without pre-embedding

Abstract

This application relates to the technical field of column foundation structures, and particularly to a construction process for a column foundation structure without pre-embedding, which includes the following construction steps: building the steel bar framework of the column foundation, detachably connecting the positioning and forming frame to the steel bar framework, and the position of the positioning and forming frame is the position where the column structure is to be built in the engineering design; pouring the column foundation, and disassembling the positioning and forming frame to form an installation hole on the column foundation; synchronously building the steel bar cage of the column structure, horizontally binding the steel bar cage on the ground, and positioning the main steel bars of the steel bar cage through the positioning and forming frame; pouring the column structure. This application has the effects of reducing the probability of low engineering quality caused by problems with pre-embedded steel bars, reducing construction costs and construction risks, and improving construction efficiency.

Description

Technical Field

[0001] This application relates to the field of column foundation structures, and in particular to a construction process for a column foundation structure without pre-embedding. Background Technique

[0002] In civil engineering, the column structure is the lower load-bearing structure for supporting the upper structure. The lower part of the column structure is the column foundation for supporting the column. In the conventional construction process, the column foundation and the column structure are constructed separately. When both the column foundation and the column structure adopt the construction process of casting concrete, in order to ensure the formation of an effective whole between the concretes cast successively and ensure the construction quality of the project, a part of the steel bars of the column structure is pre-buried in the column foundation, and this part of the steel bars is called pre-embedded steel bars.

[0003] The lower part of the pre-embedded steel bars is cast and fixed in the column foundation, and the upper part of the pre-embedded steel bars is exposed above the column foundation, and the pre-embedded steel bars need to be used as the main steel bars of the column structure. To ensure that the main steel bars of the column structure are an effective whole and ensure the construction quality, the main steel bars of the column structure need to be vertically welded to the upper ends of the pre-embedded steel bars one by one, and then a scaffolding platform is built for working at heights. The auxiliary steel bars are tied and fixed to the main steel bars. The main steel bars and the auxiliary steel bars vertically fixed to the main steel bars form a steel bar framework. The scaffolding platform is removed, the column casting formwork is built, and the formwork is removed after the column is cast.

[0004] In the actual construction process, it is found that: the upper part of the pre-embedded steel bars is exposed to the outside, which is very easy to cause deformation and rust. In order to ensure the quality, additional protection needs to be provided for the pre-embedded steel bars, increasing the construction cost. The construction of tying the steel bar framework by working at heights on the scaffolding platform is relatively dangerous, and it can only be carried out after the concrete of the column foundation has solidified to have sufficient strength, resulting in low construction efficiency and long construction period. Summary of the Invention

[0005] In order to reduce the probability of low project quality caused by problems with pre-embedded steel bars, reduce construction costs and construction risks, and improve construction efficiency, this application provides a construction process for a column foundation structure without pre-embedding.

[0006] A construction process for a column foundation structure without pre-embedding includes the following construction steps:

[0007] Construct the steel bar framework of the column foundation: At the position of the column foundation designed in the project, tie the steel bar framework, and detachably connect the positioning and forming frame to the steel bar framework. The position of the positioning and forming frame is the position where the column structure is to be built in the project design;

[0008] Pour the column foundation: Build the pouring formwork for the column foundation around the steel bar cage, pour concrete into the formwork, and disassemble the positioning and forming frame after the concrete starts to set and before it finally sets to form an installation hole in the column foundation. Then, reversely buckle and cover the positioning and forming frame on the installation hole of the column foundation.

[0009] Build the steel bar cage of the column structure: Horizontally bind the steel bar cage on the ground. The steel bar cage can be bound while binding the steel bar skeleton or when waiting for the concrete of the poured column foundation to solidify. Position the main steel bars of the steel bar cage through the positioning and forming frame and then bind the steel bar cage.

[0010] Pour the column structure: After the strength of the column foundation meets the standard, vertically hoist the steel bar cage above the installation hole, pour the fixing agent into the installation hole, insert the lower end of the steel bar cage correspondingly into the installation hole, check the verticality of the steel bar cage before the fixing agent starts to set, build the pouring formwork for the column structure, and pour concrete into the formwork after the fixing agent completely solidifies.

[0011] By adopting the above technical solution, the positioning and forming frame that can be detachably connected to the steel bar skeleton can form an installation hole in the column foundation and play a connecting role instead of the embedded steel bars. The reverse buckling of the positioning and forming frame can protect the installation hole and does not require additional protection like the embedded steel bars, reducing the construction cost. The positioning and forming frame can position the main steel bars of the steel bar cage, enabling the steel bar cage to be horizontally bound, avoiding the need to build a high platform for operation, reducing the construction risk. At the same time, the steel bar cage can be adaptively inserted into the installation hole, and the steel bar cage can be conveniently fixed in the installation hole through the fixing agent. This reduces the probability of low engineering quality caused by problems with the embedded steel bars, reduces the construction cost and construction risk, and improves the construction efficiency.

[0012] Optionally, the positioning and forming frame includes a column groove forming plate and a plurality of hole groove forming parts detachably connected to the column groove forming plate. The number of the hole groove forming parts is set according to the number of the main steel bars of the steel bar cage.

[0013] A fixing hole adapted to the main steel bar is opened at one end of the hole groove forming part away from the column groove forming plate, and the steel bar skeleton or the steel bar cage can be inserted into the fixing hole.

[0014] By adopting the above technical solution, the hole groove forming parts are inserted into the steel bar skeleton or the steel bar cage through the fixing holes, and the plurality of hole groove forming parts are detachably connected to the column groove forming plate, enabling the positioning and forming frame to be detachably connected to the steel bar skeleton or the steel bar cage. The column groove forming plate makes the formed installation hole include a column bottom groove. When pouring the column structure later, injecting concrete into the column bottom groove from the outside can seal the gap of the formwork, and the subsequent concrete does not need to be removed, reducing the probability of the column structure having rotten roots.

[0015] Optionally, the hole and groove forming member includes a roughening forming portion and an adjusting portion provided at one end of the roughening forming portion, and the fixing hole is opened on the end surface of the roughening forming portion away from the adjusting portion;

[0016] The adjusting portion is in the shape of a threaded rod, and several adjusting nuts are threadedly connected to the adjusting portion. A plurality of insertion holes adapted to the adjusting portion are opened on the column groove forming plate, and the plurality of insertion holes are distributed in a circular ring shape.

[0017] By adopting the above technical solution, the adjusting portion is movably inserted into the column groove forming plate through the insertion hole, and the hole and groove forming member is detachably connected to the column groove forming plate in cooperation with the adjusting nut. Moreover, by changing the position of the adjusting nut on the adjusting portion, the distance between the roughening forming portion and the column groove forming plate can be adjusted, so that when the roughening forming portion is inserted into the steel bar cage through the fixing hole, the column groove forming plate always remains balanced, and the bottom of the column bottom groove is flat, improving the engineering quality.

[0018] Optionally, a bolt rod is provided at one end of the roughening forming portion away from the fixing hole, and a screw rod hole adapted to the bolt rod is opened on the end surface of the adjusting portion. The aperture of the screw rod hole is equal to the aperture of the fixing hole.

[0019] By adopting the above technical solution, the bolt rod cooperates with the screw rod hole to detachably connect the roughening forming portion to the adjusting portion. When the roughening forming portion is for one-time use, it is convenient to replace the roughening forming portion. At the same time, the aperture of the screw rod hole is equal to the aperture of the fixing hole, and fixing the adjusting portion on the column groove forming plate can also position the main steel bars of the steel reinforcement cage.

[0020] Optionally, a hexagonal head is provided at one end of the adjusting portion away from the roughening forming portion, and the end surface of the hexagonal head is inscribed in the end surface of the adjusting portion.

[0021] By adopting the above technical solution, the hexagonal head is convenient to fix and can rotate the adjusting portion conveniently.

[0022] Optionally, roughening protrusions are provided on the surface of the column groove forming plate close to the roughening forming portion, and the roughening protrusions are roughening protrusions made of flexible materials.

[0023] By adopting the above technical solution, the roughening protrusions can form a roughened surface at the bottom of the column bottom groove formed by the column groove forming plate, which is convenient for subsequent concrete to be combined and fixed on the column foundation when pouring concrete in the column bottom groove.

[0024] Optionally, a lifting member is detachably connected to the middle of the column groove forming plate.

[0025] By adopting the above technical solution, the lifting member can lift the column groove forming plate conveniently.

[0026] Optionally, the roughening forming part is in the shape of a round rod, and roughening pyramids are spirally arranged on the circumferential surface of the roughening forming part. The roughening pyramids are made of flexible materials;

[0027] A fixing thread adapted to the main reinforcement is arranged in the fixing hole, and the rotational advancing direction of the roughening pyramid is the same as that of the fixing thread.

[0028] By adopting the above technical solution, the roughening forming part forms an inserting rod groove for inserting a steel reinforcement cage on the column foundation. The spirally arranged roughening pyramids, combined with the flexibility of the roughening pyramids, facilitate the removal of the roughening forming part. At the same time, when the roughening forming part is removed, a roughened surface can be formed on the inner wall of the inserting rod groove, enabling the fixing agent to better fix the steel reinforcement cage on the column foundation.

[0029] Optionally, the roughening forming part is in the shape of an arc-shaped plate, and a plurality of the roughening forming parts can form a cylinder;

[0030] A roughening layer is arranged on the arc-shaped surface of the roughening forming part. The roughening layer is made of flexible materials, and an adhesive layer is arranged between the roughening layer and the roughening forming part.

[0031] By adopting the above technical solution, the adhesive layer enables the roughening layer to be detachably connected to the roughening forming part. Combined with the flexibility of the roughening layer, the roughening forming part can be conveniently removed. At the same time, the roughening layer can form a roughened surface on the inner wall of the inserting rod groove, enabling the fixing agent to better fix the steel reinforcement cage on the column foundation.

[0032] Optionally, exhaust holes are formed in the column groove forming plate, and the lifting member is threadedly connected in the exhaust holes.

[0033] By adopting the above technical solution, the exhaust holes can discharge the air below the column groove forming plate when pouring the concrete of the column foundation, reducing the probability of cavities appearing below the column groove forming plate.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. By setting the column foundation, steel bar cage, installation duct, fixing agent, column structure, steel reinforcement cage and positioning and forming frame, the positioning and forming frame that can be detachably connected to the steel bar cage can form an installation duct on the column foundation, play a connecting role instead of embedded steel bars, and the reverse buckle of the positioning and forming frame can protect the installation duct, eliminating the need for additional protection as in the case of embedded steel bars, reducing construction costs. At the same time, the positioning and forming frame can position the main steel bars of the steel reinforcement cage, enabling the steel reinforcement cage to be horizontally tied, avoiding the need to build a high platform for operation, reducing construction risks. The steel reinforcement cage can be adaptively inserted into the installation duct, and the steel reinforcement cage can be conveniently fixed in the installation duct through the fixing agent, reducing the probability of low project quality caused by problems with embedded steel bars, reducing construction costs and construction risks, and improving construction efficiency;

[0036] 2. By setting the chiseling and forming part, fixing holes, bolt rods, adjusting part and screw holes, the bolt rods cooperate with the screw holes to make the chiseling and forming part detachably connected to the adjusting part. When the chiseling and forming part is for one-time use, it is convenient to replace the chiseling and forming part. At the same time, the diameter of the screw holes is equal to the diameter of the fixing holes, and fixing the adjusting part on the column groove forming plate can also position the main steel bars of the steel reinforcement cage;

[0037] 3. By setting the chiseling pyramid, the chiseling and forming part forms an insertion rod groove for inserting the steel reinforcement cage on the column foundation. The helically arranged chiseling pyramid, combined with the flexibility of the chiseling pyramid, facilitates the removal of the chiseling and forming part. When the chiseling and forming part is removed, a chiseled surface can be formed on the inner wall of the insertion rod groove, enabling the fixing agent to better fix the steel reinforcement cage on the column foundation. Description of the Drawings

[0038] Figure 1 It is a schematic structural diagram of the column structure and column foundation in the embodiment of the present application.

[0039] Figure 2 It is a schematic structural diagram of the column foundation and positioning and forming frame in the embodiment of the present application.

[0040] Figure 3 It is a schematic cross-sectional view of the positioning and forming frame in the embodiment of the present application.

[0041] Figure 4 It is a schematic structural diagram of the column foundation and positioning and forming frame in another embodiment of the present application.

[0042] Figure 5 It is a schematic cross-sectional view of the positioning and forming frame in another embodiment of the present application.

[0043] Description of reference numerals: 1. Column foundation; 11. Steel bar cage; 12. Installation hole; 121. Bottom groove of column; 122. Insert rod groove; 13. Fixing agent; 2. Column structure; 21. Steel reinforcement cage; 3. Positioning and forming frame; 4. Column groove forming plate; 41. Insertion hole; 42. Chiseling protrusion; 43. Vent hole; 5. Hole groove forming part; 51. Chiseling forming part; 511. Fixing hole; 512. Bolt rod; 513. Chiseling pyramid; 514. Chiseling layer; 515. Adhesive layer; 52. Adjusting part; 521. Screw hole; 522. Hexagonal head; 523. Adjusting nut; 6. Lifting part. Specific implementation mode

[0044] The following is a further detailed description of the present application in conjunction with the attached Figures 1 - 5 drawings.

[0045] The embodiment of the present application discloses a construction technology for a precast-free pier column foundation structure.

[0046] A construction technology for a precast-free pier column foundation structure includes the following construction steps: building the steel bar cage 11 of the column foundation 1; pouring the column foundation 1; building the steel reinforcement cage 21 of the column structure 2; pouring the column structure 2.

[0047] In the step of building the steel bar cage 11 of the column foundation 1, first, according to the engineering design, at the position of the column foundation 1, the main steel bars and the secondary steel bars are tied into a steel bar cage 11 with wire. According to the engineering design, at the position where the column structure 2 will be built later, the positioning and forming frame 3 is vertically inserted on the main steel bar, so that the positioning and forming frame 3 is detachably connected to the steel bar cage 11.

[0048] In the step of pouring the column foundation 1, first, a pouring formwork for the column foundation 1 is built around the steel bar cage 11, and concrete is poured into the pouring formwork. After the concrete starts to set and before it finally sets, the positioning and forming frame 3 is disassembled so that an installation hole 12 is formed on the column foundation 1, and then the positioning and forming frame 3 is reversely buckled and covered on the installation hole 12 of the column foundation 1 to protect the installation hole 12.

[0049] In the step of building the steel reinforcement cage 21 of the column structure 2, the main steel bars are horizontally arranged on the ground, and the length of the main steel bars is greater than the length of the column structure 2. The secondary steel bars are tied to the main steel bars with wire to form a steel reinforcement cage 21, avoiding building a high-altitude working platform for high-altitude operations and reducing the degree of construction risk. While tying the steel bar cage 11, or waiting for the concrete of the column foundation 1 to solidify, the steel reinforcement cage 21 is tied. The two steps are carried out simultaneously, which can shorten the construction period and improve the construction efficiency. The positioning steel bars can be inserted on the positioning and forming frame 3. The diameter of the positioning steel bars is equal to the diameter of the main steel bars. The main steel bars for tying the steel reinforcement cage 21 can be inserted on the positioning and forming frame 3, so that the positioning and forming frame 3 can play a role in positioning the main steel bars, and the tied steel reinforcement cage 21 can be adapted to the installation hole 12.

[0050] In the step of pouring the column structure 2, it is necessary to wait for the strength of the column foundation 1 to reach the standard first, then vertically lift and transport the steel reinforcement cage 21 above the installation hole 12, pour the fixing agent 13 into the installation hole 12. The fixing agent 13 can be materials that meet the structural stress requirements such as concrete mortar, epoxy mortar, support grouting material, building high-strength glue, etc. Insert the lower end of the steel reinforcement cage 21 correspondingly into the installation hole 12. Before the fixing agent 13 starts to set, check the verticality of the steel reinforcement cage 21, build the pouring formwork of the column structure 2, and after the fixing agent 13 completely solidifies, pour concrete into the formwork.

[0051] The positioning and forming frame 3 has standard production specifications and can be reused, or partially reused. In this construction process, the positioning and forming frame 3 can be applied to multiple processes and perform multiple functions.

[0052] Refer to Figure 1 and Figure 2 As shown in [relevant figures], the positioning and forming frame 3 includes a column groove forming plate 4 and a plurality of hole groove forming parts 5 detachably connected to the column groove forming plate 4. The column groove forming plate 4 and the hole groove forming parts 5 are used to form the installation hole 12 on the column foundation 1. The column groove forming plate 4 is in the shape of a thick plate, and the plate surface of the column groove forming plate 4 can be circular or square, which is set according to the cross-sectional shape of the column structure 2. The plate surface area of the column groove forming plate 4 is larger than the cross-sectional area of the column structure 2.

[0053] Refer to Figure 2 and Figure 3 As shown in [relevant figures], a plurality of roughening protrusions 42 are arranged on the bottom plate surface of the column groove forming plate 4. The roughening protrusions 42 are in the shape of a pyramid. When pouring the concrete of the column foundation 1, the upper surface of the column foundation 1 is parallel to the top plate surface of the column groove forming plate 4. Through the column groove forming plate 4, a circular plate-shaped column bottom groove 121 can be formed on the column foundation 1. Through the roughening protrusions 42, a roughened surface can be automatically formed at the bottom of the column bottom groove 121, which is convenient for the bonding and fixing of the later-poured concrete and the previous concrete.

[0054] Refer to Figure 1 and Figure 2 As shown in [relevant figures], the column bottom groove 121 is a part of the installation hole 12. The pouring formwork of the column structure 2 can abut against the bottom of the column bottom groove 121. When injecting concrete into the column bottom groove 121 from the outside, the gap between the pouring formwork and the column bottom groove 121 can be sealed, reducing the probability of the column structure 2 having root rot. And because the concrete is injected into the column bottom groove 121, there is no need to remove the concrete used for plugging later. In this embodiment, the column structure 2 is cylindrical, and the plate surface of the column groove forming plate 4 is circular.

[0055] Refer to Figure 2 and Figure 3, a plurality of exhaust holes 43 are formed in the middle of the column groove forming plate 4. When pouring the concrete of the column foundation 1, the probability of generating cavities below the column groove forming plate 4 can be reduced through the exhaust holes 43. A lifting member 6 is arranged in the middle of the column groove forming plate 4. Through the lifting member 6, the column groove forming plate 4 can be conveniently lifted. The lifting member 6 includes a threaded rod and a ring. The lifting member 6 can be threadedly connected to the exhaust hole 43 through the threaded rod.

[0056] The number of the exhaust holes 43 is set according to the plate area of the column groove forming plate 4. The number of the lifting members 6 is less than that of the exhaust holes 43. The number of the lifting members 6 is set according to the weight of the column groove forming plate 4. In this embodiment, 7 exhaust holes 43 are provided and 1 lifting member 6 is provided.

[0057] A plurality of jack holes 41 are formed in the column groove forming plate 4. The plurality of jack holes 41 are distributed in a circular ring shape. The hole groove forming member 5 includes an adjusting part 52 movably inserted into the jack hole 41 and a chiseling forming part 51 arranged at one end of the adjusting part 52. The adjusting part 52 is in the shape of a threaded rod. A plurality of adjusting nuts 523 are threadedly connected to the adjusting part 52. A fixing hole 511 adapted to the main reinforcement is formed at one end of the chiseling forming part 51 far from the adjusting part 52. The chiseling forming part 51 can be inserted into the steel bar framework 11 or the steel bar cage 21 through the fixing hole 511.

[0058] The adjusting part 52 is inserted into the jack hole 41, and the column groove forming plate 4 is between the adjusting nuts 523, so that the adjusting part 52 is fixed on the column groove forming plate 4. By changing the position of the adjusting nut 523 on the adjusting part 52, the relative position between the adjusting part 52 and the column groove forming plate 4 can be conveniently changed, and the distance between the chiseling forming part 51 and the column groove forming plate 4 can be adjusted. Thus, when the chiseling forming part 51 is inserted into the steel bar framework 11, the column groove forming plate 4 can always be kept horizontal, the bottom of the column bottom groove 121 can be horizontal, and the engineering quality during pouring the column structure 2 can be improved. In this embodiment, two adjusting nuts 523 are provided, and the column groove forming plate 4 is between the two adjusting nuts 523.

[0059] Refer to Figure 2 and Figure 3 , a hexagonal head 522 is arranged at one end of the adjusting part 52. The end face of the hexagonal head 522 is inscribed in the end face of the adjusting part 52. The adjusting part 52 can be conveniently rotated through the hexagonal head 522. A screw hole 521 is formed at one end of the adjusting part 52 far from the hexagonal head 522. A bolt rod 512 adapted to the screw hole 521 is arranged at one end of the chiseling forming part 51 far from the fixing hole 511. The screw hole 521 and the bolt rod 512 are matched, so that the chiseling forming part 51 is detachably connected to the adjusting part 52.

[0060] Since the entire chiseling and forming part 51 is within the concrete of the column foundation 1 until after the concrete initial setting and before final setting, the chiseling and forming part 51 will be under great pressure, which is likely to cause damage to the chiseling and forming part 51. The chiseling and forming part 51 can be set as a disposable component according to needs. The chiseling and forming part 51 is detachably connected to the adjustment part 52, facilitating the replacement of the chiseling and forming part 51.

[0061] The aperture diameter of the screw hole 521 is equal to the aperture diameter of the fixing hole 511, and the center axis of the bolt rod 512 coincides with the center line axis of the fixing hole 511. After the hole groove forming member 5 is fixed on the column groove forming plate 4, both the chiseling and forming part 51 and the adjustment part 52 can be inserted on the main reinforcement. When binding the main reinforcement of the steel reinforcement cage 21, the main reinforcement can be positioned.

[0062] Refer to Figure 2 and Figure 3 In one embodiment, the chiseling and forming part 51 is in a round rod shape, and a plurality of chiseling pyramid 513 are spirally arranged on the circumferential surface of the chiseling and forming part 51. Through the chiseling and forming part 51, a cylindrical insertion rod groove 122 can be formed in the column foundation 1. The insertion rod groove 122 is part of the installation duct 12. The top of the insertion rod groove 122 communicates with the bottom of the column bottom groove 121, and the chiseling pyramid 513 can form a chiseling surface on the inner wall of the insertion rod groove 122.

[0063] The main reinforcement is a deformed bar, and fixing threads adapted to the main reinforcement are provided in the fixing hole 511. The fixing threads cooperate with the main reinforcement, enabling the main reinforcement to be conveniently screwed into or out of the fixing hole 511, facilitating the fixation or separation of the chiseling and forming part 51 from the main reinforcement.

[0064] The rotation forward direction of the chiseling pyramid 513 is the same as the rotation forward direction of the fixing threads. When the chiseling and forming part 51 is poured into the concrete of the column foundation 1, the plurality of spirally arranged chiseling pyramid 513 can play the same role as the threads. The chiseling pyramid 513 has good flexibility. Rotating the chiseling and forming part 51 can conveniently remove the chiseling and forming part 51 from the concrete of the column foundation 1 without generating excessive residues in the insertion rod groove 122.

[0065] Refer to Figure 4 and Figure 5, in another embodiment, the roughening forming part 51 is in the shape of an arc plate, and a plurality of roughening forming parts 51 can form a cylinder. A cylindrical inserting rod groove 122 can be formed in the column foundation 1 through the plurality of roughening forming parts 51. A roughening layer 514 is arranged on the arc surface of the roughening forming part 51. The roughening layer 514 is a layered body with a plurality of pyramid-shaped protrusions on one side. The roughening layer 514 is made of a flexible material. An adhesive layer 515 is arranged between the roughening layer 514 and the roughening forming part 51. The roughening layer 514 can be detachably connected to the roughening forming part 51 through the adhesive layer 515. Due to the good flexibility of the roughening layer 514 and the cooperation of the adhesive layer 515, the roughening forming part 51 can be conveniently taken out. When the roughening layer 514 is taken out, a roughened surface is formed on the inner wall of the inserting rod groove 122.

[0066] ​

Claims

1. A construction technology for a pier column foundation structure without pre-embedding, characterized in that: It includes the following construction steps: Construct the steel bar cage (11) of the column foundation (1): At the position of the column foundation (1) designed in the project, bind the steel bar cage (11), detachably connect the positioning and forming frame (3) to the steel bar cage (11), and the position of the positioning and forming frame (3) is the position where the column structure (2) is to be built in the engineering design; Pour the column foundation (1): Around the steel bar cage (11), build the pouring formwork of the column foundation (1), pour concrete into the formwork. Before the concrete initial sets and before it finally sets, disassemble the positioning and forming frame (3) so that an installation hole (12) is formed on the column foundation (1), and then reversely buckle and cover the positioning and forming frame (3) on the installation hole (12) of the column foundation (1); Construct the steel bar cage (21) of the column structure (2): Horizontally bind the steel bar cage (21) on the ground. The steel bar cage (21) can be bound simultaneously with the binding of the steel bar cage (11), or while waiting for the concrete of the column foundation (1) to solidify, and position the main steel bars of the steel bar cage (21) through the positioning and forming frame (3); Pour the column structure (2): After the strength of the column foundation (1) reaches the standard, vertically hoist the steel bar cage (21) above the installation hole (12), pour a fixing agent (13) into the installation hole (12), insert the lower end of the steel bar cage (21) correspondingly into the installation hole (12), check the perpendicularity of the steel bar cage (21) before the fixing agent (13) initial sets, build the pouring formwork of the column structure (2), and pour concrete into the formwork after the fixing agent (13) completely solidifies; The positioning and forming frame (3) includes a column groove forming plate (4) and a plurality of hole groove forming members (5) detachably connected to the column groove forming plate (4), and the number of the hole groove forming members (5) is set according to the number of the main steel bars of the steel bar cage (21); A fixing hole (511) adapted to the main steel bar is opened at one end of the hole groove forming member (5) away from the column groove forming plate (4), and the steel bar cage (11) or the steel bar cage (21) can be inserted into the fixing hole (511); The hole groove forming member (5) includes a roughening forming part (51) and an adjusting part (52) arranged at one end of the roughening forming part (51), and the fixing hole (511) is opened on the end face of the roughening forming part (51) away from the adjusting part (52); The adjusting part (52) is in the shape of a threaded rod, and several adjusting nuts (523) are threadedly connected to the adjusting part (52). A plurality of insertion holes (41) adapted to the adjusting part (52) are opened on the column groove forming plate (4), and the plurality of insertion holes (41) are distributed in a circular ring shape; A bolt rod (512) is arranged at one end of the roughening forming part (51) away from the fixing hole (511), and a screw rod hole (521) adapted to the bolt rod (512) is opened on the end face of the adjusting part (52), and the aperture of the screw rod hole (521) is equal to the aperture of the fixing hole (511).

2. The construction process of a pier foundation structure without pre-embedding according to claim 1, characterized in that: A hexagonal head (522) is provided at one end of the adjusting part (52) away from the roughening forming part (51), and the end face of the hexagonal head (522) is inscribed in the end face of the adjusting part (52).

3. The construction process of a pier foundation structure without pre-embedding according to claim 2, characterized in that: Roughening protrusions (42) are provided on the surface of the column groove forming plate (4) close to the roughening forming part (51), and the roughening protrusions (42) are made of flexible materials.

4. The construction process of a pier foundation structure without pre-embedding according to claim 3, characterized in that: A lifting member (6) is detachably connected to the middle of the column groove forming plate (4).

5. The construction process of a pier foundation structure without pre-embedding according to claim 4, characterized in that: The roughening forming part (51) is rod-shaped, and roughening pyramids (513) are spirally arranged on the circumferential surface of the roughening forming part (51), and the roughening pyramids (513) are made of flexible materials; Fixing threads adapted to the main reinforcement are provided in the fixing holes (511), and the rotational forward direction of the roughening pyramids (513) is the same as the rotational forward direction of the fixing threads.

6. The construction process of a pier foundation structure without pre-embedding according to claim 5, characterized in that: The roughening forming part (51) is arc-shaped plate-like, and a plurality of the roughening forming parts (51) can form a cylinder; A roughening layer (514) is provided on the arc surface of the roughening forming part (51), the roughening layer (514) is made of flexible materials, and an adhesive layer (515) is provided between the roughening layer (514) and the roughening forming part (51).

7. The construction process of a pier foundation structure without pre-embedding according to claim 6, characterized in that: Exhaust holes (43) are formed in the column groove forming plate (4), and the lifting member (6) is threadedly connected in the exhaust holes (43).

Images