Construction method of ventilation wall structure shared by concrete column and steel pipe column

Abstract

The invention discloses a construction method of a ventilation wall structure shared by a concrete column and a steel pipe column, which comprises the following steps: hoisting a concrete prefabricated column to a concrete column construction position, and inserting into a positioning tool in a bottom plate for reinforcement; a bottom plate side face formwork is erected, and a construction seam is reserved below the construction position of the steel pipe column; the bottom of the concrete prefabricated column, the positioning tool and the part below the construction joint are poured together; welding the steel pipe column in the steel pipe column steel frame to form an integral structure, hoisting to a steel pipe column construction position, and mounting and connecting with the embedded part of the bottom plate; a steel pipe column bottom side face formwork is erected, and the bottom and the construction joint are poured together through concrete; mounting a disassembly-free steel bottom die in a gap between the concrete prefabricated column and the steel pipe column, taking a steel pipe column steel frame as a top plate bottom die at the top, and pouring to form a reinforced concrete beam. The concrete prefabricated columns are adopted, a reinforcing and adjusting system is constructed, installation and control over the distance between the columns are facilitated, the construction difficulty is lowered, and the precision requirements for simultaneous reinforcing and in-place installation of the multiple dense prefabricated columns are met.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method for a ventilation wall structure shared by a concrete column and a steel pipe column. Background Art

[0002] In order to ensure that the nuclear power plant has a corresponding power supply in the event of a power outage in the entire plant, the nuclear power plant is equipped with a diesel generator building. In order to ensure the smooth ventilation system of the diesel generator building, dense concrete columns and steel pipe columns share a wall in the ventilation room of the diesel engine building. Its functions include ventilation, rain protection and protection against flying objects, among which ventilation is the most important. Rain protection and protection against flying objects also need to be considered. Therefore, there needs to be staggered joints between the concrete columns and steel pipe columns, and the structure is similar to that of shutters.

[0003] In the prior art, the shared wall of dense concrete columns and steel pipe columns is cast using traditional wooden formwork, which has the following problems: it is difficult to support the formwork for construction and difficult to vibrate and compact it, the operation time is long, and the subsequent formwork removal is difficult; the steel pipe column steel frame has large external dimensions and heavy overall weight, and dense steel pipe columns are welded inside the steel pipe column steel frame. There are many steel pipe columns, the height of the steel pipe columns is high, and the net spacing is narrow, which is not easy to weld on site; if the steel pipe columns and concrete columns are constructed at the same time, it is not easy to reinforce the steel pipe columns and concrete columns, and the operation risk is high; the net spacing between the concrete columns and the steel pipe columns is narrow, and there are difficulties in the joint construction of dense concrete columns and steel pipe columns, and there are also great difficulties in the support and removal of the cast-in-place concrete column formwork; there are cast-in-place reinforced concrete beams on the top of the dense concrete columns and steel pipe columns, and there are also great difficulties in supporting the bottom formwork of the top beams. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a construction method for a ventilation wall structure shared by concrete columns and steel pipe columns. The construction process is easier to operate, more applicable, and can improve construction efficiency.

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

[0006] The present invention provides a construction method for a ventilation wall structure shared by a concrete column and a steel pipe column, wherein the concrete column is a prefabricated concrete column, and the method comprises the following steps:

[0007] Arrange positioning tools in the bottom plate at the construction location of the concrete column; install embedded parts in the bottom plate at the construction location of the steel pipe column; tie the steel bars in the bottom plate;

[0008] Hoist the precast concrete column to the concrete column construction location, insert it into the positioning tooling in the base plate, and reinforce it in place;

[0009] A side formwork is provided for the bottom plate, and a construction joint is left below the construction position of the steel pipe column;

[0010] Pouring concrete into the base plate so that the bottom of the precast concrete column, the positioning tooling and the part below the construction joint are poured together;

[0011] The steel pipe column is welded into the steel frame of the steel pipe column to form an integral structure, the integral structure is hoisted to the construction position of the steel pipe column, and installed and connected with the embedded parts of the bottom plate;

[0012] A side formwork is supported at the bottom of the steel pipe column, and the bottom of the steel pipe column and the steel frame of the steel pipe column and the construction joint are poured together with concrete;

[0013] Tie steel bars and pour concrete for the reinforced concrete columns on the left and right sides of the ventilation wall structure;

[0014] Install the non-removable steel bottom formwork in the gaps between adjacent precast concrete columns and the gaps between precast concrete columns and corresponding steel pipe columns; the top of the precast concrete columns and steel pipe columns uses the steel frame of the steel pipe column as the top plate bottom formwork;

[0015] Reinforcement is tied on the bottom formwork of the top plate, side formwork is supported, and concrete is poured to form reinforced concrete beams.

[0016] To optimize the above technical solutions, the specific measures taken also include:

[0017] The precast concrete columns are fixed horizontally by setting four pipe columns on both sides of the precast concrete columns and supporting them with scaffolding steel pipes.

[0018] The elevation of the precast concrete column is adjusted by setting a steel beam and an elevation adjustment steel beam on the top of the four columns. After the adjustment, steel bars are welded on the positioning tooling to ensure the elevation of the precast concrete column, thereby achieving reinforcement in place.

[0019] The long side direction of the precast concrete column is clamped by the support frame and scaffolding steel pipes between the four columns, and the short side direction is clamped by the scaffolding steel pipes.

[0020] The construction joint is left below the steel pipe column and steel frame to surround the area below the steel pipe column and steel frame with wire mesh, so that this area is not poured when pouring concrete into the base plate.

[0021] Furthermore, the embedded part is a supporting channel steel.

[0022] Furthermore, the steel pipe column is welded inside the steel pipe column steel frame, and the upper and lower ends of the steel pipe column are respectively welded to the upper and lower steel plates of the steel pipe column steel frame.

[0023] Furthermore, the non-disassembly steel bottom formwork includes a steel plate and a keel welded on the upper part of the steel plate.

[0024] Preferably, the steel pipe column and steel frame are fixed by welding steel bar pull rings on both sides of the upper part of the steel pipe column and steel frame, so that the fall chain is tied with the steel bar pull ring and the steel bar anchor.

[0025] Preferably, the steel pipe column steel frame is connected and anchored to the concrete by externally welded cylindrical head nails.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention proposes a construction method for a ventilation wall shared by dense concrete columns and steel pipe columns. The concrete columns are prefabricated concrete columns, and a reinforcement and adjustment system is constructed to facilitate installation and control of the spacing between columns, reduce construction difficulty, and ensure that multiple dense prefabricated columns are reinforced and installed in place at the same time with the accuracy requirements.

[0028] The present invention adopts positioning tooling, supporting channel steel, four-pipe columns, steel beams, scaffolding steel pipes, and fall chains to form a reinforcement and adjustment system, and can easily control the distance between columns, reducing the construction difficulty, ensuring the accuracy requirements of simultaneous reinforcement and installation of multiple dense prefabricated columns, and realizing the simultaneous construction of dense concrete columns.

[0029] In view of the narrow space for erecting beam supports caused by dense concrete columns, the precast concrete columns and the steel pipe column steel frame top reinforced concrete beam bottom of the present invention adopts a support-free and non-dismantling steel bottom formwork as a permanent bottom formwork, and the force is mainly borne by the bond force between the keel and the concrete; the non-dismantling steel bottom formwork adopts a method of welding the keel on the upper part of the steel plate to achieve support-free bottom of the steel bottom formwork.

[0030] The present invention adopts supporting channel steel to reinforce the bottom of the steel pipe column steel frame. The supporting channel steel and the steel pipe column steel frame are reliably fixed. The top is fixed by welding a lifting ring on the upper part of the steel plate and fastening it with a fall chain, thereby ensuring the installation accuracy of the steel pipe column.

[0031] The invention is simple to construct and easy to operate, can ensure construction quality while effectively improving construction efficiency, shortening construction period, and reducing construction costs, and has good promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a plan view of the ventilation wall structure of the present invention.

[0033] Figure 2 It is a cross-sectional view of the ventilation wall structure of the present invention.

[0034] Figure 3 This is a plan view of the reinforcement construction process of the precast concrete column of the present invention.

[0035] Figure 4 This is a cross-sectional view of the reinforcement construction process of the precast concrete column of the present invention.

[0036] Figure 5 It is a schematic diagram of the positioning tooling of the present invention.

[0037] Figure 6It is a schematic diagram of the steel pipe column reinforcement construction process of the present invention.

[0038] Figure 7 It is a schematic diagram of the non-disassembly steel bottom formwork construction process of the present invention.

[0039] In the figure, 1. Precast concrete column; 2. Steel pipe column; 3. Bottom plate; 4. Steel pipe column steel frame; 5. Cylindrical head weld nails; 6. Reinforced concrete beam; 7. Reinforced concrete column on the left; 8. Reinforced concrete column on the right; 9. Four-tube column; 10. Steel beam; 11. Elevation adjustment steel beam; 12. Scaffolding steel pipe; 13. Support channel steel; 14. Positioning tooling; 15. Wire mesh; 16. Reinforcement pull ring; 17. Fall chain; 18. Reinforcement ground anchor; 19. Non-dismantling steel bottom formwork. DETAILED DESCRIPTION

[0040] The above contents of the present invention are further described in detail below in the form of embodiments, but this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the above contents of the present invention belong to the scope of the present invention.

[0041] The present invention provides a construction method for a ventilation wall structure shared by a concrete column and a steel pipe column, wherein the construction positions of the steel pipe column and the concrete column are two parallel rows, a bottom plate is provided at the bottom of the concrete column construction position and the steel pipe column construction position, and the concrete column adopts a prefabricated concrete column 1, and specifically comprises the following steps:

[0042] Positioning tooling 14 is arranged in the bottom plate at the construction position of the concrete column; embedded parts are installed in the bottom plate at the construction position of the steel pipe column. In a specific implementation, the embedded parts can be support channel steel 13; and steel bars are tied in the bottom plate;

[0043] The prefabricated concrete column 1 is hoisted to the concrete column construction position, and inserted into the positioning tool 14 in the bottom plate to be reinforced in place;

[0044] The side formwork is supported on the bottom plate, and a construction joint is left below the construction position of the steel pipe column;

[0045] Pour concrete into the bottom plate so that the bottom of the precast concrete column 1, the positioning fixture 14 and the part below the construction joint are poured together;

[0046] The steel pipe column is welded into the steel frame of the steel pipe column to form an integral structure, the integral structure is hoisted to the construction position of the steel pipe column, and installed and connected with the embedded parts of the bottom plate;

[0047] In some specific embodiments, the upper and lower ends of the steel pipe column 2 are respectively welded to the inner sides of the upper and lower steel plates of the steel pipe column steel frame 4 to form an integral structure which is hoisted to the construction position of the steel pipe column and installed on the supporting channel steel 13 pre-buried in the bottom plate;

[0048] By welding the steel bar pull rings 16 on both sides of the upper part of the steel plate on the steel pipe column steel frame 4, the fall chain 17 is tied with the steel bar pull ring 16 and the steel bar anchor 18 to achieve the fixation of the steel pipe column steel frame 4.

[0049] A side formwork is supported at the bottom of the steel pipe column 2, and the bottom of the steel pipe column 2 and the steel pipe column steel frame 4 and the construction joint are poured together with concrete;

[0050] The steel pipe column steel frame 4 is connected and anchored to the concrete through cylindrical head welding nails 5 welded on the outer surface.

[0051] Reinforcement binding and concrete pouring are performed on the reinforced concrete column 7 on the left wall and the reinforced concrete column 8 on the right wall of the ventilation wall structure;

[0052] Install the non-dismantling steel bottom formwork 19 in the gaps between adjacent precast concrete columns 1 and the gaps between the precast concrete columns 1 and the corresponding steel pipe columns 2, and use the steel pipe column steel frame 4 as the top plate bottom formwork on the top of the precast concrete columns 1 and the steel pipe columns;

[0053] Reinforcement is tied on the bottom formwork of the top plate, side formwork is supported, and concrete is poured to form reinforced concrete beams.

[0054] The present invention is further described in detail below in conjunction with specific embodiments:

[0055] As attached Figure 1-7 As shown, a construction method of a ventilation wall shared by dense concrete columns and steel pipe columns is shown. The design drawing changes the cast-in-place concrete column to a precast concrete column 1. The precast concrete column 1 is precast at the precast site, and the steel pipe column 2 is precast in the workshop. The specific construction steps are as follows:

[0056] S1: Before the reinforcement of the bottom plate 3 is tied, a positioning tool 14 is arranged at the bottom construction position of each precast concrete column 1, and a supporting channel steel 13 is pre-embedded in the bottom plate of the steel pipe column construction position in advance for the reinforcement of the bottom of the steel pipe column steel frame 4;

[0057] S2: bottom plate 3 reinforcement binding;

[0058] S3: hoisting, reinforcement and positioning of precast concrete column 1;

[0059] S4: The side formwork of the bottom plate 3 is supported, a construction joint is left at the bottom of the steel pipe column construction position, and concrete is poured;

[0060] S5: hoist, reinforce and put into place the overall structure of the steel pipe column 2 and the steel pipe column steel frame 4;

[0061] S6: Set up side formwork at the bottom of steel pipe column 2 and perform grouting;

[0062] S7: Tie the steel bars of the left and right reinforced concrete columns of the wall and pour the concrete;

[0063] S8: Install the non-dismantling steel bottom formwork 19 in the gaps between adjacent precast concrete columns 1 and the gaps between the precast concrete columns 1 and the corresponding steel pipe columns 2;

[0064] S9: Use the steel pipe column steel frame 4 as the bottom formwork of the top plate, tie the reinforced concrete beam 6 and the top plate steel bars, support the formwork, and pour the concrete.

[0065] The length of the precast concrete column 1 needs to be considered for on-site roughening and elevation control. During precasting, it should be controlled to be 100mm longer than the theoretical length to avoid the precast length being too short, which would affect the subsequent installation and construction of the non-dismantling steel bottom formwork 19. The length of the bottom steel bar of the precast concrete column 1 extending into the bottom plate 3 is 1000mm, and the length of the upper part extending into the reinforced concrete beam 6 is 700mm.

[0066] When pouring concrete, the precast concrete column 1 needs to be fixed to ensure the positioning of the precast concrete column 1. Four-tube columns 9 plus scaffolding steel pipes 12 are used for horizontal fixing, and the spacing between columns is controlled. The bottom is fixed by a reinforcement tool 14. After the precast concrete column 1 is initially in place, the four-tube columns 9 on both sides are used to set a steel beam 10 at the top and a height adjustment steel beam 11 to adjust the elevation. After the adjustment is completed, steel bars are welded on the positioning tool 14 to ensure the elevation of the precast concrete column 1, and finally reinforced in place.

[0067] After each precast concrete column 1 is hoisted to the designated position, reinforcement measures should be taken immediately. Use scaffolding steel pipes 12 to connect and clamp the precast concrete column 1 with the support frames on both sides along the long side direction of the precast concrete column 1. Use scaffolding steel pipes 12 to connect and clamp the precast concrete column 1 in the short side direction to ensure that the column does not fall and the verticality deviation is not greater than 10mm. The reinforced scaffolding steel pipes 12 must not be less than 2. If there is a gap between the scaffolding steel pipes 12 and the precast concrete column 1, wooden wedges can be used to wedging. The bottom reinforcement of the steel pipe column steel frame 4 requires pre-embedded support channel steel 13 in the bottom plate in advance. The channel steel should be at least [10 or above. Two channel steels are pre-embedded at each fixed point with a spacing of 1200mm. The top of the support channel steel 13 and the bottom of the steel pipe column steel frame 4 are reliably fixed.

[0068] An "L"-shaped groove construction joint is reserved within the range of the cylindrical head welding nails 5 at the bottom of the steel pipe column steel frame 4 by using a wire mesh 15. After the reinforcement of the steel pipe column steel frame 4 is completed, the construction joint between the bottom of the steel pipe column steel frame 4 and the cast bottom plate 3 is filled with grouting material.

[0069] There are steel pipe column steel frame 4 around the steel pipe column 2. The outer dimensions of the steel pipe column steel frame 4 are 6800*5000*300mm and the overall weight is large. The upper and lower ends of the steel pipe column 2 are welded inside the steel pipe column steel frame. There are 21 steel pipe columns 2 in total. The steel pipe column 2 is 5m high and the net spacing between columns is only 80:9mm. The outer sides of the steel pipe column steel frame 4 are welded. L=150 cylindrical head welding nails 5, each 2 cylindrical head welding nails 5 form a group with a spacing of 160mm, and each 2 groups of cylindrical head welding nails 5 have a spacing of 400mm, which are prefabricated into a whole.

[0070] The top of the steel pipe column steel frame 4 is fixed by welding steel bar pull rings 16 on both sides of the upper steel plate of the steel frame and pulling and fastening through a fall chain 17.

[0071] After the construction is completed, the protruding part of the steel bar pull ring 16 is cut off, and the four pipe columns 9, the steel beam 10, the elevation adjustment steel beam 11, the scaffolding steel pipe 12, the fall chain 17 and the steel bar anchor 18 are removed.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A construction method for a concrete column and a steel pipe column sharing a ventilation wall structure, characterized in that: The concrete column adopts a prefabricated concrete column, which includes the following steps: Arrange positioning tools in the bottom plate at the construction location of the concrete column; install embedded parts in the bottom plate at the construction location of the steel pipe column; tie the steel bars in the bottom plate; Hoist the precast concrete column to the concrete column construction location, insert it into the positioning tooling in the base plate, and reinforce it in place; A side formwork is provided for the bottom plate, and a construction joint is left below the construction position of the steel pipe column; Pouring concrete into the base plate so that the bottom of the precast concrete column, the positioning tooling and the part below the construction joint are poured together; The steel pipe column is welded into the steel frame of the steel pipe column to form an integral structure, the integral structure is hoisted to the construction position of the steel pipe column, and installed and connected with the embedded parts of the bottom plate; A side formwork is supported at the bottom of the steel pipe column, and the bottom of the steel pipe column and the steel frame of the steel pipe column and the construction joint are poured together with concrete; Tie steel bars and pour concrete for the reinforced concrete columns on the left and right sides of the ventilation wall structure; Install the non-removable steel bottom formwork in the gaps between adjacent precast concrete columns and the gaps between precast concrete columns and corresponding steel pipe columns; the top of the precast concrete columns and steel pipe columns uses the steel frame of the steel pipe column as the top plate bottom formwork; Reinforcement is tied on the bottom formwork of the top plate, side formwork is supported, and concrete is poured to form reinforced concrete beams.

2. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The precast concrete columns are fixed horizontally by setting four pipe columns on both sides of the precast concrete columns and supporting them with scaffolding steel pipes.

3. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The elevation of the precast concrete column is adjusted by setting a steel beam and an elevation adjustment steel beam on the top of the four columns. After the adjustment, steel bars are welded on the positioning tooling to ensure the elevation of the precast concrete column, thereby achieving reinforcement in place.

4. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The long side direction of the precast concrete column is clamped by the support frame and scaffolding steel pipes between the four columns, and the short side direction is clamped by the scaffolding steel pipes.

5. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The construction joint is left below the steel pipe column and steel frame to surround the area below the steel pipe column and steel frame with wire mesh, so that this area is not poured when pouring concrete into the base plate.

6. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The embedded parts are supporting channel steels.

7. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The steel pipe column is welded inside the steel pipe column steel frame, and the upper and lower ends of the steel pipe column are respectively welded to the upper and lower steel plates of the steel pipe column steel frame.

8. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The non-disassembly steel bottom formwork comprises a steel plate and a keel welded on the upper part of the steel plate.

9. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: By welding steel bar pull rings on both sides of the upper part of the steel pipe column steel frame, the fall chain is connected with the steel bar pull ring and the steel bar anchor to fix the steel pipe column steel frame.

10. The construction method of the concrete column and the steel pipe column shared ventilation wall structure according to claim 1, characterized in that: The steel pipe column steel frame is connected and anchored to the concrete through externally welded cylindrical head welding nails.

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