Construction method of tall formwork support system for deep space utilization project

Abstract

The present invention relates to a method for constructing a tall formwork support system for deep space utilization projects, comprising the following steps: construction preparation; base plate construction; construction of underground floor side walls, middle partition walls, and frame columns; large armpit angle construction; shield construction; and, after completion of construction and inspection and acceptance, removal of equipment and machinery. The beneficial effects of the present invention are: the present invention can not only improve the safety and convenience of formwork assembly, enhance formwork strength and rigidity, hole sealing effect, and steel formwork hoisting speed, but also simultaneously improve construction quality and efficiency, greatly improve the efficiency of on-site formwork installation and hoisting, save manpower and costs, and achieve good technical and economic benefits when applied to actual projects.

Description

Technical Field

[0001] The present invention belongs to the field of tunnel and underground engineering, and in particular relates to a construction method of a tall formwork support system for deep space utilization engineering, which is suitable for the construction of tall formwork for deep space utilization engineering, and in particular for the construction of large armpit angles. Background Art

[0002] With the expansion of urban underground space development and the rapid development of high-rise buildings, subways, and high-speed railways, more and more underground facilities are emerging, and the number of ultra-large and ultra-deep foundation pit projects is increasing. During shield construction, the problem of large-diameter shield machines penetrating ultra-deep foundation pits is constantly encountered. Reducing the negative impact of these machines on the support structures of ultra-deep foundation pits has become a critical and difficult construction step in deep foundation pit construction. During subway station structure construction, the support system for tall formwork is particularly difficult to construct, especially since armpit angles are often required to increase the overall stability of the structure. In the past, quality assurance was difficult, construction efficiency was low, and construction safety issues could not be effectively controlled.

[0003] In view of this, in order to address the shortcomings in the previous high-rise formwork construction of deep space utilization projects, a new construction method is urgently needed to improve construction efficiency, improve construction quality, and ensure safe and reliable construction quality. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a construction method for a tall formwork support system for deep space utilization engineering.

[0005] This deep space construction method utilizes an engineering tall formwork support system, including the following steps:

[0006] Step 1: Construction preparation: Ensure on-site traffic control, keep the site clean and tidy, and inspect and accept construction materials entering the site;

[0007] Step 2: Bottom slab construction: After the bottom slab reinforcement is tied, formwork construction is carried out, and finally concrete is poured. When the strength meets the requirements, the support is removed;

[0008] Step 3: Construction of underground floor side walls, partition walls, and frame columns: First, tie the steel bars of the side walls, partition walls, and frame columns, then construct the formwork. Steel formwork is used for the side walls, and wooden formwork is used for the partition walls and frame columns. Finally, concrete is poured and cured.

[0009] Step 4: Large armpit angle construction: After the armpit angle reinforcement is tied, the steel formwork is constructed. The steel formwork is hoisted using segmented hoisting and splicing brackets. The bottom channel steel bracket is fixed by the bottom tie fixing system. The position of the bottom channel steel bracket is adjusted by the rear and front adjustment legs. Concrete is poured and cured. When the strength reaches the required level, the formwork is removed.

[0010] Step 5: Shield construction: After the underground floor structure is completed, shield construction will be carried out. After the shield machine construction is completed, the shield hole will be sealed. After the sealing is completed, concrete will be poured. After the strength meets the requirements, the formwork will be removed;

[0011] Step 6: After the construction is completed and inspected and accepted, the equipment and machinery are dismantled and removed from the site.

[0012] Preferably, in step three: wooden formwork is set on both sides of the middle partition wall, wooden squares are set on the outside of the wooden formwork, double-jointed steel pipes are set on the outside of the wooden squares and the wooden formwork is fastened by tension bolts, ground anchor steel bars are fixed to the bottom plate, one end of the inclined support steel pipe is fixed on the double-jointed steel pipe, and the other end is fixed on the ground anchor steel bar.

[0013] As a preferred embodiment, step four is specifically as follows: first, the steel formwork at the large armpit angle of the base plate is hoisted using a segmented hoisting and splicing bracket, an oblique base frame is provided at the lower portion of the first bracket, the second bracket, the third bracket and the fourth bracket, and the oblique base frame is connected and fixed by a fixed clamp, the steel formwork is installed on the oblique base frame for hoisting, and the front adjustment legs and the rear adjustment legs are installed at the bottom of the first bracket;

[0014] The steel formwork is located at the large armpit angle, the angle steel is located at the bottom of the steel formwork, the steel formwork is fixed by positioning steel bars, the steel bracket is fixed to the steel formwork, and the steel formwork is fixed by the tension fixing structure; the embedded U-shaped reinforcement of the bottom tension fixing system is fixed to the bottom plate, the fixed steel plate is welded to the embedded U-shaped reinforcement, the steel pressure beam is installed on the channel steel bracket, the fixed reinforcement fixes the channel steel bracket through the steel pressure beam, one end is welded to the fixed steel plate, and the other end is fixed to the steel pressure beam with a nut through a gasket; the wooden pads in the front and rear adjusting legs are fixed to the bottom plate through soil nails, the jack is fixed to the wooden pads, and the top plate is fixed to the top of the jack; the embedded U-shaped reinforcement of the tension fixing structure is fixed to the bottom plate, the fixed steel is vertically installed on the channel steel bracket, the gasket is installed on the strand steel, the nut at one end of the screw is tightened, and the other end of the screw is welded to the embedded U-shaped reinforcement to fix the channel steel bracket.

[0015] Preferably, in step five: the shield hole is located on the bottom plate of the underground floor, the support rod base is located on the bottom plate, the support rod is fixed on the support rod base, the oblique reinforcement support connects and fixes the two support rods, the U-shaped top support is fixed on the upper part of the support rod, the tightening channel steel is installed on the U-shaped top support, the hole steel bar is located in the shield hole, the template is installed at the shield hole, the steel plate is fixed on the bottom plate, the steel beam is fixed to the steel plate through the steel beam support vertical rod, one end of the template connecting rod is fixed on the steel beam, and the other end is fixed on the template.

[0016] The beneficial effects of the present invention are:

[0017] 1) The present invention adopts a shield hoisting reserved hole sealing structure to carry out shield hole sealing construction. The hole sealing is convenient and fast, and normal construction can be carried out under the plate without affecting the construction progress.

[0018] 2) The present invention assembles and hoists the large armpit angle steel template through the base plate large armpit angle inclined single-side bracket channel steel reinforced steel template quick splicing structure and the base plate large armpit angle steel template hoisting structure, with high adjustment accuracy, tight splicing, good forming effect, fast construction speed and easy operation.

[0019] 3) The present invention adopts a middle partition wall formwork support system to carry out the middle partition wall formwork construction, which has good formwork support effect and high stability, ensuring the quality of formwork construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the high template support structure of the deep space utilization engineering of the present invention

[0021] Figure 2 This is a schematic diagram of the shield hoisting reserved hole blocking structure of the present invention

[0022] Figure 3 This is a schematic diagram of the system structure of the large armpit angle oblique horizontal single-side bracket channel steel reinforced steel mold rapid splicing system of the present invention

[0023] Figure 4 yes Figure 3 Schematic diagram of the mid-bottom tie-in fixing system structure

[0024] Figure 5 yes Figure 3 Schematic diagram of the front and rear adjustment leg structure

[0025] Figure 6 yes Figure 3 Schematic diagram of the central tension fixed structure

[0026] Figure 7 This is a schematic diagram of the hoisting structure of the large armpit angle steel formwork of the bottom plate

[0027] Figure 8 Schematic diagram of the structure of the middle partition wall formwork support

[0028] In the figure: 1-ground line, 2-underground floor, 3-bottom plate, 4-middle partition wall, 5-column, 6-side wall, 7-large armpit angle, 8-shield outline, 9-shield hole, 10-support rod base, 11-oblique reinforcement support, 12-support rod, 13-U-shaped top support, 14-tightening channel steel, 15-formwork, 16-hole steel bar, 17-steel pad, 18-steel beam, 19-steel beam support vertical rod, 20-formwork connecting rod, 21-steel formwork, 22-channel steel bracket, 23-tension fixing structure, 24-rear adjustment leg, 25-bottom tie fixing system, 26-front Adjusting legs, 27-positioning steel bars, 28-angle steel, 29-embedded U-shaped bars, 30-fixed steel plates, 31-steel pressure beams, 32-gaskets, 33-nuts, 34-wooden pads, 35-soil nails, 36-jacks, 37-top plates, 38-screws, 39-fixed steel sections, 40-first bracket, 41-second bracket, 42-third bracket, 43-fourth bracket, 44-fixed clamps, 45-oblique base frame, 46-wooden formwork, 47-ground anchor bars, 48-oblique support steel pipes, 49-square timber, 50-double-piece steel pipes, 51-tension bolts, 52-fixed bars. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the following examples. The following examples are provided only to facilitate understanding of the present invention. It should be noted that, without departing from the principles of the present invention, it is possible for a person skilled in the art to make various modifications to the present invention, and such improvements and modifications fall within the scope of the claims of the present invention.

[0030] Example 1

[0031] like Figures 1 to 8 As shown, the construction method of deep space using engineering tall formwork support system includes the following steps:

[0032] Step 1: Construction preparation: Ensure on-site traffic control, keep the site clean and tidy, and inspect and accept construction materials entering the site;

[0033] Step 2: Bottom slab construction: After the bottom slab reinforcement is tied, formwork construction is carried out, and finally concrete is poured. When the strength meets the requirements, the support is removed;

[0034] Step 3, construction of underground floor side walls, middle partition walls and frame columns: first, tie the reinforcement of the side walls 6, middle partition walls 4 and frame columns, and then carry out formwork construction. The side walls 6 use steel formwork 21, and the middle partition walls 4 and frame columns use wooden formwork 46. The wooden formwork 46 is set on both sides of the middle partition wall 4, and the wooden squares 49 are set on the outside of the wooden formwork 46. The double-piece steel pipe 50 is set on the outside of the wooden square 49 and fastened to the wooden formwork 46 by tension bolts 51. The ground anchor steel bar 47 is fixed to the bottom plate 3. One end of the oblique support steel pipe 48 is fixed to the double-piece steel pipe 50, and the other end is fixed to the ground anchor steel bar 47. Finally, pour concrete and maintain.

[0035] Step 4: Large armpit angle construction: After the armpit angle reinforcement is tied, the steel formwork is constructed. First, the steel formwork 21 of the large armpit angle 7 of the base plate is hoisted using a segmented hoisting and splicing bracket. The lower parts of the first bracket 40, the second bracket 41, the third bracket 42, and the fourth bracket 43 are provided with an oblique base frame 45, and are connected and fixed by a fixed hoop 44. The steel formwork 21 is installed on the oblique base frame 45 for hoisting, and the front adjustment leg 26 and the rear adjustment leg 24 are installed at the bottom of the first bracket 40;

[0036] Steel formwork assembly: The steel formwork 21 is located at the large axillary angle 7, and the angle steel 28 is located at the bottom of the steel formwork 21. The steel formwork 21 is fixed by the positioning steel bars 27. The steel support 22 is fixed to the steel formwork 21 and fixed by the tension fixing structure 23. The bottom tie fixing system 25 is used to fix the bottom channel steel support 22. The rear adjustment legs 24 and the front adjustment legs 26 are used to adjust the position of the bottom channel steel support 22. The embedded U-shaped ribs 29 of the bottom tie fixing system 25 are fixed to the base plate 3, and the fixing steel plate 30 is welded to the embedded U-shaped ribs 29. The steel pressure beam 31 is installed on the channel steel support 22. The fixing ribs 52 fix the channel steel support 22 through the steel pressure beam 31. One end is welded to the fixing steel plate 30, and the other end is fixed to the steel pressure beam 31 with a nut 33 through a gasket 32. The wooden pads 34 in the front and rear adjustable legs are fixed to the base plate via soil nails 35. Jacks 36 are fixed to the wooden pads 34, and the top plate 37 is fixed to the top of the jacks 36. The embedded U-shaped reinforcement 29 of the tension fixing structure is fixed to the base plate 3. The fixed steel 39 is vertically installed on the channel steel bracket 22. The gasket 32 ​​is installed on the stranded steel 39. One end of the screw 38 is tightened by the nut 33, and the other end is welded to the embedded U-shaped reinforcement 29 to fix the channel steel bracket 22.

[0037] Concrete pouring: After the formwork construction is completed, concrete is poured and cured. When the strength reaches the required level, the formwork is removed;

[0038] Step 5, shield construction: After the construction of the underground floor structure is completed, shield construction is carried out. After the construction of the shield machinery is completed, the shield hole is sealed. The shield hole 9 is located on the bottom plate of the underground floor 2, the support rod base 10 is located on the bottom plate 3, and the support rod 12 is fixed on the support rod base 10. The oblique reinforcement support 11 is connected and fixed to the two support rods 12, the U-shaped top support 13 is fixed to the upper part of the support rod 12, and the tightening channel steel 14 is installed on the U-shaped top support 13. The hole steel bar 16 is located in the shield hole 9, and the template 15 is installed at the shield hole 9. The steel plate 17 is fixed on the bottom plate, and the steel beam 18 is fixed to the steel plate 17 through the steel beam support vertical rod 19. One end of the template connecting rod 20 is fixed to the steel beam 18, and the other end is fixed to the template 15. After the sealing is completed, concrete is poured and the template is removed after the strength meets the requirements;

[0039] Step 6: After the construction is completed and inspected and accepted, the equipment and machinery are dismantled and removed from the site.

[0040] Example 2

[0041] The high formwork support system for deep space utilization engineering obtained according to the construction method of the high formwork support system for deep space utilization engineering proposed in Example 1 includes a shield hoisting reserved hole blocking structure, a base plate large armpit angle inclined single-side bracket channel steel reinforced steel formwork rapid splicing system, a base plate large armpit angle steel formwork hoisting structure and a middle partition wall formwork support system;

[0042] The shield hoisting reserved hole blocking structure includes a shield hole 9, a support rod base 10, a support rod 12, a U-shaped top support 13, a top channel steel 14, a template 15, a hole steel bar 16, a steel pad 17, a steel beam support vertical rod 19, a steel beam 18, and a template connecting rod 20. The shield hole 9 is located on the bottom plate of the underground floor 2, the support rod base 10 is located on the bottom plate 3, the support rod 12 is fixed on the support rod base 10, and the oblique reinforcement support 11 is connected Fix two support rods 12, the U-shaped top support 13 is fixed on the upper part of the support rod 12, the tightening channel steel 14 is installed on the U-shaped top support 13, the hole steel bar 16 is located in the shield hole 9, the template 15 is installed at the shield hole 9, the steel plate 17 is fixed on the bottom plate, the steel beam 18 is fixed on the steel plate 17 through the steel beam support vertical rod 19, one end of the template connecting rod 20 is fixed on the steel beam 18, and the other end is fixed on the template 15.

[0043] The base plate large armpit angle oblique single-sided bracket channel steel reinforced steel formwork rapid splicing system includes a steel formwork 21, a channel steel bracket 22, a tension fixing structure 23, a rear adjustment leg 24, a bottom tie fixing system 25, a front adjustment leg 26, a positioning steel bar 27, and an angle steel 28. The steel formwork 21 is located at the large armpit angle 7, and the angle steel 28 is located at the bottom of the steel formwork 21. The steel formwork 21 is fixed by the positioning steel bar 27. The steel support 22 is fixed on the steel formwork 21 and fixed by the tension fixing structure 23. The bottom tie fixing system 25 is used to fix the bottom channel steel bracket 22. The rear adjustment leg 24 and the front adjustment leg 26 are used to adjust the position of the bottom channel steel bracket 22.

[0044] The bottom tie-fixing system 25 includes embedded U-shaped ribs 29, fixed steel plates 30, pressure beams 31, washers 32, nuts 33, and fixed ribs 52. The embedded U-shaped ribs 29 are fixed to the bottom plate 3, the fixed steel plates 30 are welded to the embedded U-shaped ribs 29, the steel pressure beams 31 are installed on the channel steel brackets 22, and the fixed ribs 52 are fixed to the channel steel brackets 22 through the steel pressure beams 31. One end of the fixed ribs 52 is welded to the fixed steel plate 30, and the other end is fixed to the steel pressure beams 31 with nuts 33 through the washers 32.

[0045] The rear adjustment legs 24 and the front adjustment legs 26 both include a wooden pad 34 , soil nails 35 , a jack 36 , and a top plate 37 . The wooden pad 34 is fixed to the bottom plate through the soil nails 35 , the jack 36 is fixed to the wooden pad 34 , and the top plate 37 is fixed to the top of the jack 36 .

[0046] The tension fixing structure 23 includes a pre-embedded U-shaped rib 29, a gasket 32, a nut 33, a screw 38, and a fixed steel 39. The pre-embedded U-shaped rib 29 is fixed on the base plate 3, the fixed steel 39 is vertically installed on the channel steel bracket 22, the gasket 32 ​​is installed on the strand steel 39, and one end of the screw 38 is fixed to the pre-embedded U-shaped rib 29 by tightening the nut 33 and the other end is welded to the pre-embedded U-shaped rib 29 to fix the channel steel bracket 22.

[0047] The base plate large armpit angle steel formwork lifting structure includes a first bracket 40, a second bracket 41, a third bracket 42, a fourth bracket 43, a fixed hoop 44, and an inclined base frame 45. The first bracket 40, the second bracket 41, the third bracket 42, and the fourth bracket 43 are provided with an inclined base frame 45 at the lower part, and are connected and fixed by a fixed hoop 44. The steel formwork 21 is installed on the inclined base frame 45 for lifting, and the front adjustment legs 26 and the rear adjustment legs 24 are installed at the bottom of the first bracket 40.

[0048] The middle partition wall formwork support system includes wooden formwork 46, ground anchor steel bars 47, oblique support steel pipes 48, square timbers 49, double-jointed steel pipes 50, and tension bolts 51. The wooden formwork 46 is arranged on both sides of the middle partition wall 4, the wooden squares 49 are arranged on the outside of the wooden formwork 46, the double-jointed steel pipes 50 are arranged on the outside of the wooden squares 49 and fastened to the wooden formwork 46 by tension bolts 51, the ground anchor steel bars 47 are fixed on the bottom plate 3, one end of the oblique support steel pipe 48 is fixed on the double-jointed steel pipe 50, and the other end is fixed on the ground anchor steel bars 47.

[0049] It also includes an underground floor 2, a middle partition wall 4, columns 5, side walls 6, and a large armpit corner 7. The underground floor 2, the middle partition wall 4, the columns 5, the side walls 6, and the large armpit corner 7 are all below the ground line 1.

Claims

1. A construction method for a tall formwork support system for a deep space utilization project, characterized in that: The following steps are involved: Step 1: Construction preparation: Ensure on-site traffic control, keep the site clean and tidy, and inspect and accept construction materials entering the site; Step 2: Bottom slab construction: After the bottom slab reinforcement is tied, formwork construction is carried out, and finally concrete is poured. When the strength meets the requirements, the support is removed; Step 3: Construction of underground floor side walls, middle partition walls and frame columns: First, tie the steel bars of the side walls (6), middle partition walls (4) and frame columns, then construct the formwork, using steel formwork (21) for the side walls (6) and wooden formwork (46) for the middle partition walls (4) and frame columns, and finally pour concrete and maintain. Step 4, large armpit angle construction: After the armpit angle reinforcement is tied, the steel formwork (21) is constructed. The steel formwork (21) is hoisted by a segmented hoisting and splicing bracket. The bottom channel steel bracket (22) is fixed by the bottom tie fixing system (25). The position of the bottom channel steel bracket (22) is adjusted by the rear adjustment leg (24) and the front adjustment leg (26). Concrete is poured and cured. After the strength reaches the requirement, the formwork is removed. First, the steel formwork (21) of the large armpit angle (7) of the bottom plate is hoisted by a segmented hoisting and splicing bracket. The lower parts of the first bracket (40), the second bracket (41), the third bracket (42) and the fourth bracket (43) are provided with an oblique base frame (45) and are connected and fixed by a fixing hoop (44). The steel formwork (21) is installed on the oblique base frame (45) for hoisting. The front adjustment leg (26) and the rear adjustment leg (24) are installed at the bottom of the first bracket (40). The steel formwork (21) is located at the large axillary angle (7), the angle steel (28) is located at the bottom of the steel formwork (21), the steel formwork (21) is fixed by the positioning steel bar (27), the channel steel bracket (22) is fixed on the steel formwork (21), and the steel formwork (21) is fixed by the tension fixing structure (23); the embedded U-shaped reinforcement (29) of the bottom tie fixing system (25) is fixed on the bottom plate (3), the fixed steel plate (30) is welded on the embedded U-shaped reinforcement (29), the steel pressure beam (31) is installed on the channel steel bracket (22), and the fixed reinforcement (52) is fixed to the channel steel bracket (22) through the steel pressure beam (31), one end of which is welded to the fixed steel plate (30) and the other end is fixed by the gasket (3 2) Fix it to the steel pressure beam (31) with nuts (33); the wooden pads (34) in the front adjustment legs (26) and the rear adjustment legs (24) are fixed to the bottom plate through soil nails (35); the jacks (36) are fixed to the wooden pads (34); the top plate (37) is fixed to the top of the jacks (36); the embedded U-shaped reinforcement (29) of the tension fixing structure is fixed to the bottom plate (3); the fixed steel (39) is vertically installed on the channel steel bracket (22); the gasket (32) is installed on the fixed steel (39); the nut (33) at one end of the screw (38) is tightened, and the other end of the screw (38) is welded to the embedded U-shaped reinforcement (29); the channel steel bracket (22) is fixed; Step 5, shield construction: After the construction of the underground floor structure is completed, shield construction is carried out. After the shield machine construction is completed, the shield hole (9) is sealed. After the sealing is completed, concrete is poured and the formwork is removed after the strength meets the requirements; Step 6: After the construction is completed and inspected and accepted, the equipment and machinery are dismantled and removed from the site.

2. The construction method of a high formwork support system for deep space utilization engineering according to claim 1 is characterized in that: In step 3: wooden formwork (46) is set on both sides of the middle partition wall (4), wooden squares (49) are set outside the wooden formwork (46), double-jointed steel pipes (50) are set outside the wooden squares (49) and fastened to the wooden formwork (46) by tension bolts (51), ground anchor steel bars (47) are fixed on the bottom plate (3), one end of the inclined support steel pipe (48) is fixed on the double-jointed steel pipe (50), and the other end is fixed on the ground anchor steel bar (47).

3. The construction method of a high formwork support system for deep space utilization engineering according to claim 1 is characterized in that: In step five, the shield hole (9) is located on the bottom plate of the underground floor (2), the support rod base (10) is located on the bottom plate (3), the support rod (12) is fixed on the support rod base (10), the oblique reinforcement support (11) connects and fixes the two support rods (12), the U-shaped top support (13) is fixed on the upper part of the support rod (12), the top tightening channel steel (14) is installed on the U-shaped top support (13), the hole steel bar (16) is located in the shield hole (9), the template (15) is installed at the shield hole (9), the steel plate (17) is fixed on the bottom plate, the steel beam (18) is fixed on the steel plate (17) through the steel beam support vertical rod (19), and one end of the template connecting rod (20) is fixed on the steel beam (18) and the other end is fixed on the template (15).

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