A template trolley for underground engineering construction and a beam and beam column construction method thereof

Abstract

The present invention discloses a template trolley for underground engineering construction and a method for constructing beams and beam columns, and belongs to the technical field of engineering template trolleys. The template trolley includes a trolley frame, and a right template and a left template are arranged side by side on the top of the trolley frame. The right template and the left template are connected to the trolley frame respectively through an adjustment component A and a transverse guide rail. A notch is provided at one end of the bottom mold of the right template, and a card mold installation groove is provided on the inner side of the notch. A card mold is detachably connected in the card mold installation groove. A walking mechanism is provided at the bottom of the trolley frame, and the walking mechanism is installed on the sleeper through a longitudinal guide rail. It can meet the requirements of one-time casting construction of structural columns and top longitudinal beams in sections with structural columns, and meet the requirements of separate construction of top longitudinal beams in sections without structural columns. It can realize assembly line construction, which is helpful to improve construction efficiency. The template trolley has multiple uses and is highly practical, which reduces the manufacturing cost and construction cost of the trolley.

Description

Technical Field

[0001] The invention relates to a template trolley for underground engineering construction and a beam and beam column construction method thereof, belonging to the technical field of engineering template trolleys. Background Art

[0002] The underground project was first constructed using the hole pile method in 1992 when the Dongdan Station of Beijing Subway Line 1 was built. This method combines the technical achievements of the cover excavation method and the dark excavation method. Its concept uses small pilot holes, piles, columns and beams to form vertical forces on piles, columns and beams underground without causing major disturbances to the strata. The frame support system with small force transmission forms vertical forces after the large arc arch is completed; the frame support system with large force transmission completes the subsequent structural construction under the protection of this support system to ensure construction safety.

[0003] Normally, the construction method of beam-column structure is: first install the column formwork, pour the column concrete, then remove the column formwork and install the beam formwork, pour the beam concrete, and finally remove the beam formwork to complete the construction of the beam-column structure. This construction method has the following problems: First, the interval construction of the beam-column structure will leave construction joints at the junction. Due to the existence of subjective factors such as people, materials, and machines and objective factors such as changes in external environmental conditions during the construction process, the construction joints become the weak links and defects in the beam-column structure; second, although the construction joint retention and treatment methods of continuous pouring or roughening are adopted during the construction process, in essence, it only reduces the number of weak interfaces in the node area, but cannot completely eliminate its influence; third, the beam formwork is generally supported by fastener-type or disc-type steel pipe scaffolding. Under the narrow space conditions of the small guide hole of the pile method, the installation, turnover, pre-compression of the bracket and the coordination with the construction machinery make it difficult to control the construction safety, project quality, and construction schedule. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a formwork trolley for underground engineering construction and a beam and beam-column construction method thereof.

[0005] The present invention is achieved through the following technical solutions:

[0006] A template trolley for underground engineering construction comprises a trolley frame, a right template and a left template are arranged side by side on the top of the trolley frame, the right template and the left template are respectively connected to the trolley frame through an adjustment component A and a transverse guide rail, a notch is provided at one end of the bottom mold of the right template, a card mold installation groove is provided on the inner side surface of the notch, a card mold is detachably connected in the card mold installation groove, a walking mechanism is provided at the bottom of the trolley frame, and the walking mechanism is installed on the sleepers through a longitudinal guide rail.

[0007] The adjustment assembly A comprises four oil cylinders arranged side by side, and a translation trolley is provided at the lower end of each of the four oil cylinders. The translation trolleys at the lower ends of the four oil cylinders are laterally connected via a translation rod.

[0008] The notch comprises a semicircular notch and a rectangular notch which are connected to each other, and the width of the rectangular notch is consistent with the diameter of the semicircular notch.

[0009] The clamping die is a convex clamping die or a concave clamping die. The shape and size of the convex clamping die match the clamping die installation groove, and the concave clamping die is engaged with the semicircular notch in the notch to form a full circle.

[0010] The whole circle formed by the concave clamping die and the semicircular notch in the notch is provided with a prefabricated steel pipe for the structural column, and the structural column steel pipe fixing frame includes four 1 / 4 steel pipe pieces connected together by flanges.

[0011] The clamping mold comprises a support back rib and an anti-seepage panel arranged on the support back rib, and the edge of the anti-seepage panel is provided with stepped anti-seepage patterns.

[0012] A structural column steel pipe fixing frame is provided on the trolley frame just below the notch, and a plurality of trolley stabilizing jacks are installed at the bottom of the trolley frame at positions corresponding to the longitudinal guide rails.

[0013] A plurality of template reinforcement jacks are provided at the bottom of the right template and the left template.

[0014] A beam construction method for a template trolley for underground engineering construction, the construction method comprising the following main steps:

[0015] Clear obstacles in the trolley's path, level the site, and install sleepers and longitudinal guide rails;

[0016] Lift the formwork trolley onto the longitudinal guide rail, control the walking mechanism to move the formwork trolley to the specified position along the longitudinal guide rail, and lift the trolley's stabilizing jack to the top surface of the longitudinal guide rail to keep the trolley frame basically stable;

[0017] Move the left template and the right template to the specified position by the translation trolley. After the left template and the right template are docked in place, the lifting cylinder adjusts the template to the specified elevation;

[0018] After the left and right templates are corrected in place, lift the template reinforcement jack to keep the left and right templates basically stable;

[0019] Use multiple tie rods to connect the formwork trolley to the inner wall of the tunnel and the foundation to further stabilize the formwork trolley;

[0020] Place the convex card mold into the card mold installation groove, fix the convex card mold with a steel wedge, and fill the installation gap between the convex card mold and the right template with sealing material;

[0021] Tie up the steel bars and install the stopper formwork, pour concrete into the formwork, and after the concrete solidifies and reaches the demolding strength, remove the stopper formwork and tie rods, then unload and move out the formwork trolley.

[0022] A beam and column construction method of a template trolley for underground engineering construction, the construction method comprising the following main steps:

[0023] (1) Clear obstacles in the trolley's travel path, level the site, and install sleepers and longitudinal guide rails;

[0024] (2) Hoist the formwork trolley onto the longitudinal guide rail, control the walking mechanism to move the formwork trolley to the specified position along the longitudinal guide rail, and lift the trolley stabilizing jack to the top surface of the longitudinal guide rail to keep the trolley frame basically stable;

[0025] (3) Move the left template and the right template to the specified position by the translation trolley. After the left template and the right template are docked in place, the lifting cylinder adjusts the template to the specified elevation;

[0026] (4) After the left and right templates are corrected in place, lift the template reinforcement jack to keep the left and right templates basically stable;

[0027] (5) Use multiple tie rods to connect the formwork trolley to the inner wall of the tunnel and the foundation to further stabilize the formwork trolley;

[0028] (6) Use a hand winch to lift the prefabricated steel pipes of the structural columns in sections. Place the lower pipe end of the prefabricated steel pipes of the structural columns into the connecting channel of the upper and lower guide holes, and place the upper pipe end into the groove on the right template.

[0029] (7) Install the structural column steel pipe fixing frame, place the concave clamping die into the clamping die installation groove, adjust and correct the position of the structural column prefabricated steel pipe, use the steel wedge to fix the concave clamping die to fix the upper end of the structural column prefabricated steel pipe, fill the installation gap between the concave clamping die, the structural column prefabricated steel pipe and the right template with sealing material, tighten the structural column steel pipe fixing frame to fix the middle part of the structural column prefabricated steel pipe;

[0030] (8) Tie the steel bars and install the stopper formwork, pour concrete into the formwork, and after the concrete solidifies and reaches the demolding strength, remove the stopper formwork, tie rods, concave clamps and structural column steel pipe fixing frames, and then unload and remove the formwork trolley.

[0031] The beneficial effects of the present invention are:

[0032] 1. The structural columns and top longitudinal beams are cast in one step, and there will be no construction joints at the joints of the beams and columns. The strength of the joints of the beams and columns and the overall structure is good.

[0033] 2. It can not only meet the requirements of one-time pouring construction of structural columns and top longitudinal beams in sections with structural columns, but also meet the requirements of separate construction of top longitudinal beams in sections without structural columns. It can realize assembly line construction, which helps to improve construction efficiency. The template trolley has multiple uses and is highly practical, which reduces the trolley manufacturing cost and construction cost.

[0034] 3. The stepped anti-seepage pattern increases the contact area between the card mold and the right template, which helps to improve the anti-seepage effect of the connection between the card mold and the right template.

[0035] 4. In the narrow space conditions of the small pilot tunnel of the pile method, flexible installation, turnover and construction can be achieved, so that construction safety, project quality and construction progress can be controlled.

[0036] 5. The template trolley has the advantages of reasonable design, high durability, good safety, reliable quality and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a longitudinal section schematic diagram along AA of the present invention;

[0038] Figure 2 It is a longitudinal section schematic diagram along BB of the present invention;

[0039] Figure 3 It is a schematic diagram of the longitudinal section along BB when the present invention includes a structural column;

[0040] Figure 4 It is a longitudinal section schematic diagram along CC of the present invention;

[0041] Figure 5 It is a plane schematic diagram along IV-IV of the present invention;

[0042] Figure 6 It is a schematic plan view along V-V of the present invention;

[0043] Figure 7 It is a cross-sectional schematic diagram along Ⅰ-Ⅰ of the present invention;

[0044] Figure 8 It is a cross-sectional schematic diagram along II-II of the present invention;

[0045] Fig. 9 It is a cross-sectional schematic diagram along III-III of the present invention;

[0046] Fig.10 for Fig. 9 A local enlarged view at H;

[0047] Fig.11 This is a schematic diagram of the main structure of the structural column steel pipe fixing frame of the present invention;

[0048] Fig.12It is a top view and exploded view of the structural column steel pipe fixing frame of the present invention;

[0049] Fig.13 It is a front view of the convex clamping die of the present invention and a partial view of the stepped anti-seepage pattern;

[0050] Fig.14 It is a left view of the convex clamping die of the present invention and a partial view of the stepped anti-seepage pattern;

[0051] Fig.15 It is a top view of the convex clamping die and a partial view of the stepped anti-seepage pattern of the present invention;

[0052] Fig.16 It is a schematic structural diagram of the back rib of the bracket of the convex clamping die of the present invention;

[0053] Fig.17 It is a front view of the concave card mold of the present invention and a partial view of the stepped anti-seepage pattern;

[0054] Fig.18 It is a left view of the concave clamping die of the present invention and a partial view of the stepped anti-seepage pattern;

[0055] Fig.19 It is a top view of the concave clamping die and a partial view of the stepped anti-seepage pattern of the present invention;

[0056] Fig. 20 It is a schematic diagram of the structure of the back rib of the bracket of the concave clamping die of the present invention;

[0057] In the figure: 1-left template, 2-column, 3-crossbeam A, 4-longitudinal beam A, 5-right template, 6-longitudinal beam B, 7-oil cylinder, 8-template reinforcement jack, 9-convex clamping die, 10-concave clamping die, 11-steel wedge, 12-slot, 13-structural column steel pipe fixing frame, 14-translational trolley, 15-translational pull rod, 16-main crossbeam, 17-main longitudinal beam, 18-trolley stabilizing jack, 19-longitudinal guide rail, 20-sleeper, 21-pull rod. DETAILED DESCRIPTION

[0058] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0059] like Figures 1 to 20As shown, a template trolley for underground engineering construction described in the present invention includes a trolley frame, a right template 5 and a left template 1 are installed side by side on the top of the trolley frame, and the right template 5 and the left template 1 are connected to the trolley frame through the adjustment component A and the transverse guide rail respectively. A notch 12 is processed at one end of the bottom mold of the right template 5, and a clamping mold installation groove is processed on the inner side of the notch 12. A clamping mold is detachably connected in the clamping mold installation groove. A walking mechanism is installed at the bottom of the trolley frame, and the walking mechanism is installed on the sleeper 20 through the longitudinal guide rail 19. When in use, the walking mechanism includes two active rollers and two driven rollers. The middle shafts of the two active rollers are connected to the output shaft of the reduction box, and the input shaft of the reduction box is connected to the output shaft of the motor, so that the template trolley is driven to move along the longitudinal guide rail 19 through the motor and the reduction box. The trolley frame includes two main longitudinal beams 17 arranged side by side, and multiple main cross beams 16 are welded side by side on the main longitudinal beams 17. The main cross beam 16 facing the notch 12 is designed as a K-shaped structure, which not only ensures the structural design requirements of the main longitudinal beams 17 and the main cross beams 16, but also provides a working space for the construction of the structural columns. A back rib frame is welded on the back side of the left template 1. The back rib frame includes a cross beam A3. The end of the cross beam A3 away from the left template 1 is welded to the left template 1 through the column 2. Two longitudinal beams A4 are welded to the bottom of the back rib frame. Two longitudinal beams B6 are welded to the bottom of the right template 5.

[0060] The adjustment assembly A includes four oil cylinders 7 arranged side by side, and the lower ends of the four oil cylinders 7 are each provided with a translation trolley 14, and the lateral sides of the translation trolleys 14 at the lower ends of the four oil cylinders 7 are connected by translation rods 15. When in use, the translation trolley 14 is installed on the transverse guide rail and can roll on the transverse guide rail. The translation trolley 14 is driven by a reduction motor so that the translation trolley 14 can move along the transverse guide rail. The end of the oil cylinder 7 away from the translation trolley 14 is connected to the longitudinal beam A4 or the longitudinal beam B6.

[0061] The notch 12 includes a semicircular notch and a rectangular notch which are connected to each other, and the width of the rectangular notch is consistent with the diameter of the semicircular notch.

[0062] The clamping die is a convex clamping die 9 or a concave clamping die 10. The shape and size of the convex clamping die 9 match the clamping die installation groove. The concave clamping die 10 and the semicircular notch in the notch 12 are combined to form a full circle. When constructing beams and columns, the clamping die installed in the clamping die installation groove is the concave clamping die 10. When constructing only beams, the clamping die installed in the clamping die installation groove is the convex clamping die 9.

[0063] The prefabricated steel pipes for the structural columns are installed in the full circle formed by the concave clamping die 10 and the semicircular notch in the notch 12, and the structural column steel pipe fixing frame 13 includes four 1 / 4 steel pipe pieces connected together by flanges.

[0064] The clamping die includes a bracket back rib and an anti-seepage panel installed on the bracket back rib, and the edge of the anti-seepage panel is processed with stepped anti-seepage patterns. The stepped anti-seepage patterns increase the contact area between the clamping die and the right template 5, which helps to improve the anti-seepage effect of the connection between the clamping die and the right template 5.

[0065] A structural column steel pipe fixing frame 13 is installed on the trolley frame just below the notch 12 , and a plurality of trolley stabilizing jacks 18 are installed at the bottom of the trolley frame at positions corresponding to the longitudinal guide rails 19 .

[0066] A plurality of template reinforcement jacks 8 are installed at the bottom of the right template 5 and the left template 1 .

[0067] A beam construction method for a template trolley for underground engineering construction, the construction method comprising the following main steps:

[0068] (1) Clear obstacles in the trolley's travel path, level the site, and install sleepers 20 and longitudinal guide rails 19;

[0069] (2) Hoist the formwork trolley onto the longitudinal guide rail 19, control the walking mechanism to move the formwork trolley along the longitudinal guide rail 19 to the specified position, and lift the trolley stabilizing jack 18 to the top surface of the longitudinal guide rail 19 to keep the trolley frame basically stable;

[0070] (3) Move the left template 1 and the right template 5 to the specified position by means of the translation trolley 14. After the left template 1 and the right template 5 are docked in place, the lifting cylinder 7 adjusts the template to the specified elevation;

[0071] (4) After the left formwork 1 and the right formwork 5 are corrected in place, the formwork reinforcement jack 8 is lifted to keep the left formwork 1 and the right formwork 5 basically stable;

[0072] (5) Use multiple tie rods 21 to connect the formwork trolley to the inner wall of the tunnel and the foundation to further stabilize the formwork trolley;

[0073] (6) Place the convex clamping die 9 into the clamping die installation groove, fix the convex clamping die 9 with the steel wedge 11, and fill the installation gap between the convex clamping die 9 and the right mold plate 5 with sealing material.

[0074] (7) Tie the steel bars and install the stopper formwork, pour concrete into the formwork, and after the concrete solidifies and reaches the demolding strength, remove the stopper formwork and tie rod 21, and then unload and remove the formwork trolley.

[0075] A beam and column construction method of a template trolley for underground engineering construction, the construction method comprising the following main steps:

[0076] (1) Clear obstacles in the trolley's travel path, level the site, and install sleepers 20 and longitudinal guide rails 19;

[0077] (2) Hoist the formwork trolley onto the longitudinal guide rail 19, control the walking mechanism to move the formwork trolley along the longitudinal guide rail 19 to the specified position, and lift the trolley stabilizing jack 18 to the top surface of the longitudinal guide rail 19 to keep the trolley frame basically stable;

[0078] (3) Move the left template 1 and the right template 5 to the specified position by means of the translation trolley 14. After the left template 1 and the right template 5 are docked in place, the lifting cylinder 7 adjusts the template to the specified elevation;

[0079] (4) After the left formwork 1 and the right formwork 5 are corrected in place, the formwork reinforcement jack 8 is lifted to keep the left formwork 1 and the right formwork 5 basically stable;

[0080] (5) Use multiple tie rods 21 to connect the formwork trolley to the inner wall of the tunnel and the foundation to further stabilize the formwork trolley;

[0081] (6) The prefabricated steel pipes for the structural columns are hoisted in sections by means of a hand winch. The lower pipe opening of the prefabricated steel pipes for the structural columns is placed into the connecting channel of the upper and lower guide holes, and the upper pipe opening is placed into the groove 12 on the right template 5.

[0082] (7) Install the structural column steel pipe fixing frame 13, put the concave clamping die 10 into the clamping die installation groove, adjust and correct the position of the structural column prefabricated steel pipe, use the steel wedge 11 to fix the concave clamping die 10, fix the upper end of the structural column prefabricated steel pipe, fill the sealing material in the installation gap between the concave clamping die 10, the structural column prefabricated steel pipe and the right template 5, tighten the structural column steel pipe fixing frame 13, and fix the middle part of the structural column prefabricated steel pipe. When installing the structural column steel pipe fixing frame 13, first combine the two steel pipe segments into a semicircle, connect them firmly with bolts, and hoist them at the designated position on the trolley frame. During the installation and correction of the structural column prefabricated steel pipe, adjust the plane position of the installed structural column steel pipe fixing frame 13. After the installation of the structural column prefabricated steel pipe is completed, tighten the installed structural column steel pipe fixing frame 13, and combine the remaining two steel pipe segments and the installed steel pipe segments into a complete circle, and connect them firmly with bolts to achieve the effect of the middle part of the structural column prefabricated steel pipe.

[0083] (8) Tie the steel bars and install the stopper formwork, pour concrete into the formwork, and after the concrete solidifies and reaches the demolding strength, remove the stopper formwork, tie rod 21, concave clamping formwork 10 and structural column steel pipe fixing frame 13, and then unload and remove the formwork trolley.

[0084] After placing the convex clamping mold 9 or the concave clamping mold 10 into the clamping mold installation groove, knock the steel wedge 11 into the gap between the clamping mold and the clamping mold installation groove from bottom to top and from inside to outside, so that the anti-seepage panel of the clamping mold and the panel of the right template 5 are at the same level.

[0085] Compared with the prior art, the technical solution provided by the present invention has the following technical effects:

[0086] 1. The structural columns and top longitudinal beams are cast in one step, and there will be no construction joints at the joints of the beams and columns. The strength of the joints of the beams and columns and the overall structure is good.

[0087] 2. It can not only meet the requirements of one-time pouring construction of structural columns and top longitudinal beams in sections with structural columns, but also meet the requirements of separate construction of top longitudinal beams in sections without structural columns. It can realize assembly line construction, which helps to improve construction efficiency. The template trolley has multiple uses and is highly practical, which reduces the trolley manufacturing cost and construction cost.

[0088] 3. The contact area between the card mold and the right template 5 is increased by the stepped anti-seepage pattern, which helps to improve the anti-seepage effect of the connection between the card mold and the right template 5.

[0089] 4. In the narrow space conditions of the small pilot tunnel of the pile method, flexible installation, turnover and construction can be achieved, so that construction safety, project quality and construction progress can be controlled.

[0090] 5. The template trolley has the advantages of reasonable design, high durability, good safety, reliable quality and easy operation.

Claims

1. A template trolley for underground engineering construction, characterized in that: It comprises a trolley frame, a right template (5) and a left template (1) are arranged side by side above the trolley frame, the right template (5) and the left template (1) are connected to the trolley frame respectively through an adjustment component A and a transverse guide rail, a notch (12) is provided at one end of the bottom template of the right template (5), a die mounting groove is provided on the inner side surface of the notch (12), a die is detachably connected in the die mounting groove, a walking mechanism is provided at the bottom of the trolley frame, and the walking mechanism is mounted on a sleeper (20) through a longitudinal guide rail (19); The notch (12) comprises a semicircular notch and a rectangular notch which are connected to each other, and the width of the rectangular notch is consistent with the diameter of the semicircular notch; The clamping die is a convex clamping die (9) or a concave clamping die (10), the shape and size of the convex clamping die (9) match the clamping die installation groove, and the concave clamping die (10) and the semicircular notch in the notch (12) are engaged to form a full circle; A prefabricated steel pipe for a structural column is arranged in a full circle formed by the engagement of the concave clamping die (10) and the semicircular notch in the notch (12); a structural column steel pipe fixing frame (13) is arranged on the trolley frame directly below the notch (12); the structural column steel pipe fixing frame (13) comprises four 1 / 4 steel pipe sheets connected together by flanges.

2. The template trolley for underground engineering construction as claimed in claim 1, characterized in that: The adjustment assembly A comprises four oil cylinders (7) arranged side by side, and a translation trolley (14) is provided at the lower end of each of the four oil cylinders (7); the translation trolleys (14) at the lower ends of the four oil cylinders (7) are connected laterally via a translation pull rod (15).

3. The template trolley for underground engineering construction as claimed in claim 1, characterized in that: The clamping mold comprises a support back rib and an anti-seepage panel arranged on the support back rib, and the edge of the anti-seepage panel is provided with stepped anti-seepage patterns.

4. The template trolley for underground engineering construction as claimed in claim 1, characterized in that: A plurality of trolley stabilizing jacks (18) are installed at the bottom of the trolley frame at positions corresponding to the longitudinal guide rails (19).

5. The template trolley for underground engineering construction as claimed in claim 1, characterized in that: A plurality of template reinforcement jacks (8) are provided at the bottom of the right template (5) and the left template (1).

6. A beam-column construction method of a template trolley for underground engineering construction according to any one of claims 1 to 5, characterized in that: The construction method comprises the following steps: (1) Clear obstacles in the trolley's path, level the site, and install sleepers (20) and longitudinal guide rails (19); (2) hoisting the formwork trolley onto the longitudinal guide rail (19), controlling the walking mechanism to move the formwork trolley along the longitudinal guide rail (19) to a specified position, and lifting the trolley stabilizing jack (18) to the top surface of the longitudinal guide rail (19) to keep the trolley frame basically stable; (3) The left template (1) and the right template (5) are moved to the designated position by the translation trolley (14). After the left template (1) and the right template (5) are docked in place, the lifting cylinder (7) adjusts the template to the designated height; (4) After the left template (1) and the right template (5) are adjusted into place, the template reinforcement jack (8) is lifted to ensure that the left template (1) and the right template (5) remain basically stable; (5) Use multiple tie rods (21) to connect the formwork trolley to the inner wall of the tunnel and the foundation to further stabilize the formwork trolley; When it is necessary to cast the beam separately, perform steps (6) and (7). (6) Place the convex clamping die (9) into the clamping die installation groove, fix the convex clamping die (9) with a steel wedge (11), and fill the installation gap between the convex clamping die (9) and the right template (5) with sealing material; (7) Tie the steel bars and install the stopper formwork, pour concrete into the formwork, and after the concrete solidifies and reaches the demolding strength, remove the stopper formwork and tie rod (21), and then unload and remove the formwork trolley; When it is necessary to cast beams and columns at one time, perform steps (8) to (10). (8) The prefabricated steel pipes for the structural columns are hoisted in sections by means of a hand chain hoist, the lower pipe openings of the prefabricated steel pipes for the structural columns are placed into the connecting passages of the upper and lower guide holes, and the upper pipe openings are placed into the notches (12) on the right template (5); (9) Install the structural column steel pipe fixing frame (13), place the concave clamping die (10) into the clamping die installation groove, adjust and correct the position of the structural column prefabricated steel pipe, use the steel wedge (11) to fix the concave clamping die (10) so that the upper end of the structural column prefabricated steel pipe is fixed, and fill the installation gap between the concave clamping die (10), the structural column prefabricated steel pipe and the right template (5) with sealing material, and tighten the structural column steel pipe fixing frame (13) so that the middle part of the structural column prefabricated steel pipe is fixed; (10) Tie the steel bars and install the stopper formwork, pour concrete into the formwork, and after the concrete solidifies and reaches the demoulding strength, remove the stopper formwork, the tie rod (21), the concave clamping formwork (10) and the structural column steel pipe fixing frame (13), and then unload and remove the formwork trolley.

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