Anti-seepage steel formwork screw-free supporting system

Abstract

The utility model relates to an anti-seepage steel formwork screw-free supporting system which comprises an anti-seepage steel formwork device and a telescopic steel pipe supporting device, the anti-seepage steel formwork device comprises a plurality of steel formwork side formworks, and the steel formwork side formworks are sequentially arranged and connected in the length direction of a cast-in-place concrete structure; the front faces of the steel mold side formworks face the cast-in-place concrete structure side, two telescopic steel pipe supporting devices are arranged between the back faces of the two oppositely-distributed steel mold side formworks in the horizontal direction, and the two telescopic steel pipe supporting devices are located at the tops and the bottoms of the steel mold side formworks correspondingly. Telescopic steel pipe supporting devices which are arranged in a crossed mode are arranged in the middle of the position between the back faces of the two oppositely-distributed steel mold side formworks, and at least two telescopic steel pipe supporting devices are arranged between the back faces of the steel mold side formworks and the enclosure structure. According to the utility model, the problem that leakage is easy to generate when a traditional steel template is fixed by adopting an opposite-pull screw rod is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction of underground spaces such as pipe galleries, and particularly relates to a leak-proof steel formwork screw-free support system. Background Art

[0002] The waterproof project is a lifeline for the construction of underground spaces such as pipe galleries. In principle, the waterproof project is based on the self-waterproofing of the structure, supplemented by waterproof measures to form a waterproof system, and the waterproofing of detailed structures such as construction joints and deformation joints is the control key point. Currently, the mainstream structures of underground spaces such as pipe galleries mostly adopt cast-in-place concrete construction. During the construction of the side wall structure of cast-in-place concrete, tie bolts are generally used to fix the formwork. Although the tie bolts are provided with water stop sheets to block the water flow path, considering the objective factors of the long construction pipeline and the large number of formwork overturning times in pipe gallery construction, the tie bolts will be damaged, and the setting of the tie bolts will cause holes on the concrete surface. If not properly treated, corrosion and leakage will occur, affecting the surface quality of fair-faced concrete and the structural service performance.

[0003] Conventional Practice 1: In the process of using the foundation pit, the traditional steel formwork support system mostly uses water-stop bolts to fix the side formwork. Underground spaces such as pipe galleries have relatively high anti-seepage requirements for themselves. Water-stop bolts are prone to leakage problems, and the efficiency is slow during the formwork removal process, and the turnover period of the formwork is long.

[0004] Conventional Practice 2: Some traditional steel formworks use the form of diagonal bracing to reinforce the side formwork. Most traditional diagonal bracings support the support points on the ground and are fixed on the ground. The two sides of structures such as pipe galleries are mostly (the outer edge of the foundation pit and the concrete box body), and neither side is suitable for setting diagonal bracings. The traditional support steel pipes are affected by the length of the steel pipes and the support angle, making installation difficult, and the space in underground spaces such as pipe galleries is not large, so they are not suitable for use. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and provide a leak-proof steel formwork screw-free support system, which solves the leakage problems that are prone to occur when traditional steel formworks are fixed with tie bolts, improves the treatment of anti-seepage problems of the side wall structures of underground cast-in-place concrete such as pipe galleries, and after pouring, the fair-faced concrete surface is exposed (without decoration), and the surface appearance quality can reach the qualified level at one time. Moreover, the support steel pipes during the construction of the side wall structures of underground structures such as pipe galleries can be adjusted to achieve the purpose of rapid installation and removal, and accelerate the turnover use cycle of the formwork.

[0006] The object of the utility model is achieved by the following technical solutions. This anti-seepage steel formwork screw-free support system includes an anti-seepage steel formwork device and a telescopic steel pipe support device. The anti-seepage steel formwork device includes steel formwork side templates. There are several steel formwork side templates, which are arranged and connected in sequence along the length direction of the cast-in-place concrete structure. And the adjacent steel formwork side templates are connected and fixed through a connecting unit. The front of the steel formwork side template faces the side of the cast-in-place concrete structure. There are two telescopic steel pipe support devices arranged horizontally between the backs of the two relatively distributed steel formwork side templates. And the two telescopic steel pipe support devices are respectively located on the top and bottom of the steel formwork side template. There is a telescopic steel pipe support device arranged in a crosswise manner at the middle position between the backs of the two relatively distributed steel formwork side templates. There are at least two telescopic steel pipe support devices arranged between the back of the steel formwork side template and the retaining structure.

[0007] The beneficial effects of the utility model are as follows: Compared with the prior art, the support system avoids using traditional tie bolts, which can reduce the leakage of the cast concrete at the bolt hole position, improve the anti-seepage of underground concrete cast-in-place structures such as pipe galleries, and the fair-faced concrete surface is exposed (without decoration) after pouring, and the surface appearance quality can reach the qualified level at one time. The adopted telescopic steel pipe support device can effectively adjust the length of the support pipe, which is convenient for on-site installation and can meet the characteristics of structural stress. Especially in the narrow underground structure spaces such as pipe galleries, it can solve the problem of difficult angles of traditional supports, achieve the purpose of rapid installation and removal, speed up the turnover cycle of the formwork, save costs, be green in construction, and improve construction efficiency.

[0008] Preferably, several horizontal back ribs are fixed on the back of the steel formwork side template. The several horizontal back ribs are arranged in sequence along the height direction of the steel formwork side template and are equally spaced up and down. Vertical back ribs are fixed on the several horizontal back ribs. The vertical back ribs are arranged in sequence along the length direction of the steel formwork side template and are equally spaced left and right. And a lifting frame for lifting the anti-seepage steel formwork device is fixed on the vertical back ribs. The lifting frame is a support frame with an isosceles triangle cross-section. The bottom of the lifting frame is fixed on the vertical back rib by welding. Hoisting holes are provided on both main bodies of the lifting frame. By setting the horizontal back ribs and vertical back ribs, the strength of the entire steel formwork side template is better. The horizontal back ribs can achieve the support effect with the telescopic steel pipe support device, and the vertical back ribs can ensure the integrity of the steel formwork with the tie bolt device. At the same time, by setting the lifting frame on the vertical back rib, it is convenient to hoist the formwork during use and can ensure the stability during the hoisting process.

[0009] Preferably, horizontal support plates are provided at both the upper and lower ends of the steel formwork side form. The horizontal support plates are perpendicularly distributed with respect to the steel formwork side form, and the width of the horizontal support plates is equal to the width of the horizontal back ribs. Both ends of the vertical back ribs extend beyond the upper and lower ends of the steel formwork side form, and the vertical back ribs are fixed to the horizontal support plates and the horizontal back ribs by welding. Stiffening plates are fixed between the horizontal support plates and the horizontal back ribs by welding. The stiffening plates are arranged successively along the length direction of the steel formwork side form and are equally spaced left and right. By providing the horizontal support plates, the fixation between the steel formwork side form and the vertical back ribs becomes more stable, and thus the stability of the steel formwork side form during use is better. Since the stress at the upper and lower ends of the steel formwork side form is relatively weak, and in actual applications, higher strength requirements are imposed on the upper and lower ends of the steel formwork side form. Coupled with the fact that the horizontal support plates and the steel formwork side form are fixed by welding, therefore, by providing the stiffening plates, the strength is greatly enhanced to increase the overall stability between the formworks.

[0010] Preferably, the vertical back ribs are composed of two symmetrically distributed channel steels. A gap space for the penetration of the tie bolts is left between the two channel steels. A steel plate is fixed to one side of the end of the vertical back ribs extending beyond the upper and lower ends of the steel formwork side form. The steel plate is provided with penetration holes for the tie bolts, and the center of the hole core of the penetration holes is aligned with the center of the gap space. A tie bolt device is provided between the front faces of the two relatively distributed steel formwork side forms. The tie bolt device is located at the upper end of the steel formwork side form and penetrates through the steel plate. The tie bolt device includes a tie bolt, a nut, and a pressing block. The pressing block is provided with a through hole and is fixed to one end face of the nut. The tie bolt penetrates through the penetration holes of the steel plate and is fixed by screwing the nut tightly. Using the tie bolt device at the top of the steel formwork side form, especially in the state of super-high pouring of the cast-in-place concrete structure, can effectively ensure the integrity of the steel formwork and prevent the deformation of the top steel formwork side form. Setting tie bolts in the steel formwork side form can well ensure the construction quality of the concrete surface and prevent the leakage of the tie bolts in the traditional process. It is more convenient compared to the formwork with strand-penetrating bolts during the installation and removal process.

[0011] Preferably, the connection unit is arranged at the left and right ends of the steel formwork side form. The connection unit includes a connecting plate and bolts. The connecting plate is fixed to the left and right ends of the steel formwork side form. The connecting plate is provided with bolt holes. Adjacent steel formwork side forms are connected and fixed through the bolt holes on the connecting plate and the bolts. Through the setting of the above structure, the connection between adjacent steel formwork side forms becomes more convenient, the structural stability after installation is better, and the disassembly and assembly are more convenient.

[0012] Preferably, the telescopic steel pipe support device includes support jacks and steel pipes. There are two support jacks and two steel pipes. A threaded support rod is fixed to the back of the support jack. One end of the steel pipe is sleeved on the threaded support rod, and a knob buckle is installed between the threaded support rod and the steel pipe. The knob buckle is screwed onto the threaded support rod, and the length of the steel pipe support device is adjusted by rotating the knob buckle clockwise or counterclockwise. The other ends of the two steel pipes are both connected with an adjustment mechanism through a connection component, and the length of the steel pipe support device after the formwork is pre-pressed is adjusted by the driving displacement of the adjustment mechanism. The centers of the support jack, the threaded support rod, the steel pipe, and the adjustment mechanism are all on the same straight line. By adding a threaded support rod and a knob buckle to the support jack and sleeving the steel pipe on the threaded support rod, it is convenient for the telescopic steel pipe support device to adjust the length within a large range. An adjustment mechanism is installed between the two steel pipes, which is convenient for the telescopic steel pipe support device to finely adjust the length after the formwork is pre-pressed. The support jack, the steel pipe, and the adjustment mechanism can all be disassembled, which can be reused, saving costs, enabling green construction, and improving construction efficiency.

[0013] Preferably, the support jack is a steel "C"-shaped member. The opening of the support jack faces the horizontal back rib on the side formwork of the steel formwork, and the opening is engaged with the horizontal back rib. The threaded support rod is located at the center of the back of the support jack. Using an adjustable support jack can quickly adjust the length of the support steel pipe. The support jack set by the above structure can expand the contact surface, better transfer the side wall stress of the formwork during the pouring process of the side wall structure, make the support stability of the support jack for the formwork better, and the clamping is more convenient during the support process.

[0014] Preferably, the knob buckle includes a knob and a nut. The nut is fixed at the center position of the knob. The knob buckle is screwed to the threaded support rod through the nut. One side of the nut is flush with one side of the knob, and a bayonet is formed between the other side of the nut and the circumferential inner wall of the knob. The bayonet abuts against one end of the steel pipe. Through the setting of the above structure, the shaping of the knob buckle is simpler and more convenient in actual application. The length of the steel pipe support device is adjusted by rotating the knob buckle clockwise or counterclockwise.

[0015] Preferably, the connection component includes four flange plates. Two of the flange plates are respectively fixed on the end faces of the other ends of the two steel pipes, and the other two flange plates are respectively fixed on the bottom end and the top end of the adjustment mechanism. The adjacent flange plates are connected and fixed by bolts. Through the setting of the above structure, the disassembly and assembly between the two steel pipes and the adjustment mechanism are more convenient, which brings convenience to the construction, and using flange plates makes the connection more stable. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural view of the anti-seepage steel formwork screw-free support system of the present utility model.

[0017] Figure 2 It is a front structural view of the anti-seepage steel formwork device of the present utility model.

[0018] Figure 3 It is a side structural view of the anti-seepage steel formwork device of the present utility model.

[0019] Figure 4 It is a schematic structural view of the splicing structure of the side formwork of the steel formwork of the present utility model.

[0020] Figure 5 It is a schematic structural view of the telescopic steel pipe support device of the present utility model.

[0021] Figure 6 It is a schematic structural view between the support jack and the steel pipe of the present utility model.

[0022] Figure 7 It is a schematic structural view between the steel pipe and the adjusting mechanism of the present utility model.

[0023] Figure 8 It is a schematic structural view of the tie rod device of the present utility model.

[0024] The reference numerals in the drawings are respectively: 100, side formwork of the steel formwork; 101, connecting unit; 102, horizontal back brace; 103, vertical back brace; 104, lifting frame; 105, transverse support plate; 106, stiffening plate; 107, channel steel; 108, steel plate; 109, insertion hole; 110, connecting plate; 111, bolt hole; 112, bolt; 113, lifting hole; 200, support jack; 201, steel pipe; 202, threaded support rod; 203, knob buckle; 204, adjusting mechanism; 205, knob; 206, nut; 207, bayonet; 208, flange plate; 300, tie rod; 301, nut; 302, pressing block; 400, anti-seepage steel formwork device; 500, telescopic steel pipe support device. Detailed Embodiment

[0025] The following will introduce the present utility model in detail with reference to the drawings: As shown in the attached Figure 1As shown in the figure, the utility model includes a seepage-proof steel formwork device 400 and a telescopic steel pipe support device 500. The seepage-proof steel formwork device includes steel formwork side formwork 100. There are several pieces of steel formwork side formwork 100, which are arranged and connected in sequence along the length direction of the cast-in-place concrete structure. And the adjacent steel formwork side formwork 100 are connected and fixed through a connection unit 101. The front of the steel formwork side formwork 100 faces the side of the cast-in-place concrete structure. There are two telescopic steel pipe support devices arranged horizontally between the backs of the two relatively distributed steel formwork side formwork 100, and the two telescopic steel pipe support devices are respectively located on the top and bottom of the steel formwork side formwork 100. There is a telescopic steel pipe support device arranged in a cross shape at the middle position between the backs of the two relatively distributed steel formwork side formwork 100. There are at least two telescopic steel pipe support devices arranged between the back of the steel formwork side formwork 100 and the retaining structure.

[0026] As shown in the attached Figures 2 to 4 figure, several horizontal back ribs 102 are fixed on the back of the steel formwork side formwork 100. The several horizontal back ribs 102 are arranged in sequence along the height direction of the steel formwork side formwork 100 and are equally spaced up and down. Vertical back ribs 103 are fixed on the several horizontal back ribs 102. The vertical back ribs 103 are arranged in sequence along the length direction of the steel formwork side formwork 100 and are equally spaced left and right. And a lifting frame 104 for lifting the seepage-proof steel formwork device is fixed on the vertical back ribs 103; the lifting frame 104 is a support frame with an isosceles triangle cross-section. The bottom of the lifting frame 104 is fixed on the vertical back ribs 103 by welding. Hoisting holes 113 are provided on both main bodies of the lifting frame 104.

[0027] Horizontal support plates 105 are provided at both the upper and lower ends of the steel formwork side formwork 100. The horizontal support plates 105 are perpendicularly distributed to the steel formwork side formwork 100, and the width of the horizontal support plates 105 is equal to the width of the horizontal back ribs 102. Both ends of the vertical back ribs 103 extend beyond the upper and lower ends of the steel formwork side formwork 100, and the vertical back ribs 103 are fixed on the horizontal support plates 105 and the horizontal back ribs 102 by welding; stiffening plates 106 are fixed between the horizontal support plates 105 and the horizontal back ribs 102 by welding. The stiffening plates 106 are arranged in sequence along the length direction of the steel formwork side formwork 100 and are equally spaced left and right.

[0028] The vertical back rib 103 is composed of two symmetrically distributed channel steels 107. There is a gap space between the two channel steels 107 for the through - insertion of the tie rod 300. On one side of the end of the vertical back rib 103 extending out of the upper and lower ends of the steel form side form 100, a steel plate 108 is fixed. The steel plate 108 is provided with a through - hole 109 for the through - insertion of the tie rod 300, and the core of the through - hole 109 is aligned with the center of the gap space. A tie rod device is arranged between the fronts of the two relatively distributed steel form side forms 100. The tie rod device is located at the upper end of the steel form side form 100 and passes through the steel plate 108, as shown in the appendix Figure 8 As shown, the tie rod device includes a tie rod 300, a nut 301, and a pressing block 302. The pressing block 302 is provided with a through - hole and is fixed on one end face of the nut 301. The tie rod 300 passes through the through - hole 109 of the steel plate 108 and is fixed by screwing the nut 301 tightly.

[0029] The connecting unit 101 is arranged at the left and right ends of the steel form side form 100. The connecting unit 101 includes a connecting plate 110 and bolts 112. The connecting plate 110 is fixed at the left and right ends of the steel form side form 100. The connecting plate 110 is provided with bolt holes 111. Adjacent steel form side forms 100 are connected and fixed through the bolt holes 111 and bolts 112 on the connecting plate 110.

[0030] As shown in the appendix Figures 5 to 7 As shown, the telescopic steel pipe support device includes two support jacks 200 and two steel pipes 201. A threaded support rod 202 is fixed on the back of the support jack 200. One end of the steel pipe 201 is sleeved on the threaded support rod 202, and a knob buckle 203 is installed between the threaded support rod 202 and the steel pipe 201. The knob buckle 203 is screwed on the threaded support rod 202, and the length adjustment of the steel pipe support device is realized by the clockwise and counter - clockwise rotation of the knob buckle 203. The other ends of the two steel pipes 201 are both connected with an adjusting mechanism 204 through a connecting component, and the length adjustment of the steel pipe support device after the formwork pre - pressing is realized by the driving displacement of the adjusting mechanism 204. The centers of the support jack 200, the threaded support rod 202, the steel pipe 201, and the adjusting mechanism 204 are all on the same straight line. The adjusting mechanism 204 is a hydraulic jack, which is convenient for adjustment and control.

[0031] The support jack 200 is a steel "C" - shaped component. The opening of the support jack 200 faces the horizontal back rib 102 on the steel form side form 100, and the opening is engaged with the horizontal back rib 102. The threaded support rod 202 is located at the center position on the back of the support jack 200.

[0032] The knob buckle 203 includes a knob 205 and a nut 206. The nut 206 is fixed at the central position of the knob 205. The knob buckle 203 is screwed and connected to the threaded support rod 202 through the nut 206. One side of the nut 206 is flush with one side of the knob 205, and a clamping groove 207 is formed between the other side of the nut 206 and the circumferential inner wall of the knob 205. The clamping groove 207 abuts against one end of the steel pipe 201.

[0033] The connection assembly includes four flange plates 208. Two of the flange plates 208 are respectively fixed on the end faces of the other ends of the two steel pipes 201, and the other two flange plates 208 are respectively fixed on the bottom end and the top end of the adjusting mechanism 204. The adjacent flange plates 208 are fixedly connected by bolts.

[0034] The using process of the utility model is as follows: First, according to the actual length of the cast-in-place concrete structure, the adjacent steel formwork side templates 100 are spliced in sequence through the connecting unit 101, and the front side of the steel formwork side template 100 faces the side of the cast-in-place concrete structure. Then, the horizontal back ribs 102 on the back of the steel formwork side template 100 are engaged with the openings of the support brackets 200 of the telescopic steel pipe support device, that is: there are two telescopic steel pipe support devices arranged horizontally between the backs of the two steel formwork side templates 100 distributed relatively, and the two telescopic steel pipe support devices are respectively located on the top and the bottom of the steel formwork side template 100. There is a telescopic steel pipe support device arranged in a crosswise manner at the middle position between the backs of the two steel formwork side templates 100 distributed relatively. At least two telescopic steel pipe support devices are arranged between the back of the steel formwork side template 100 and the retaining structure (L-shaped steel sheet pile or cast-in-place pile); Finally, the large-range length adjustment of the steel pipe support device is realized by rotating the knob buckle 203 clockwise and counterclockwise. The two support brackets 200 on the telescopic steel pipe support device are respectively fixedly connected to the formwork. The fine adjustment of the length of the steel pipe support device after the formwork is pre-pressed is realized by the driving displacement of the adjusting mechanism 204; When pouring a cast-in-place concrete structure with an ultra-high height, a tension rod device is used for tensioning and fixing at the top of the steel formwork side template.

[0035] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. An anti-seepage steel formwork screw-free support system, comprising an anti-seepage steel formwork device and a telescopic steel pipe support device, characterized in that: The anti-seepage steel formwork device includes steel formwork side formworks (100). A number of the steel formwork side formworks (100) are provided and are arranged and connected in sequence along the length direction of the cast-in-place concrete structure. And adjacent steel formwork side formworks (100) are connected and fixed through a connecting unit (101); the front of the steel formwork side formwork (100) faces the side of the cast-in-place concrete structure. Two telescopic steel pipe support devices are arranged horizontally between the backs of two relatively distributed steel formwork side formworks (100), and the two telescopic steel pipe support devices are respectively located on the top and bottom of the steel formwork side formwork (100). A telescopic steel pipe support device arranged in a crosswise manner is provided at the middle position between the backs of two relatively distributed steel formwork side formworks (100). At least two telescopic steel pipe support devices are arranged between the back of the steel formwork side formwork (100) and the retaining structure.

2. The anti-seepage steel formwork screw-free support system according to claim 1, characterized in that: A number of horizontal back ribs (102) are fixed to the back of the steel formwork side formwork (100). The number of horizontal back ribs (102) are arranged in sequence along the height direction of the steel formwork side formwork (100) and are equally spaced up and down. Vertical back ribs (103) are fixed to all the horizontal back ribs (102). The vertical back ribs (103) are arranged in sequence along the length direction of the steel formwork side formwork (100) and are equally spaced left and right. And a lifting frame (104) for lifting the anti-seepage steel formwork device is fixed to the vertical back ribs (103); the lifting frame (104) is a support frame with an isosceles triangle cross-section. The bottom of the lifting frame (104) is fixed to the vertical back ribs (103) by welding. Hoisting holes (113) are provided on both main bodies of the two sides of the lifting frame (104).

3. The anti-seepage steel formwork screw-free support system according to claim 2, characterized in that: Horizontal support plates (105) are provided at both the upper and lower ends of the steel formwork side formwork (100). The horizontal support plates (105) are vertically distributed with respect to the steel formwork side formwork (100), and the width of the horizontal support plates (105) is equal to the width of the horizontal back ribs (102). Both ends of the vertical back ribs (103) extend out of the upper and lower ends of the steel formwork side formwork (100), and the vertical back ribs (103) are fixed to the horizontal support plates (105) and the horizontal back ribs (102) by welding; stiffening plates (106) are fixed between the horizontal support plates (105) and the horizontal back ribs (102) by welding. The stiffening plates (106) are arranged in sequence along the length direction of the steel formwork side formwork (100) and are equally spaced left and right.

4. The anti-seepage steel formwork screw-free support system according to claim 2, characterized in that: The vertical back rib (103) is composed of two symmetrically distributed channel steels (107). A gap space for the insertion of the tension rod (300) is left between the two channel steels (107). One side of the end of the vertical back rib (103) extending out of the upper and lower ends of the steel form side form (100) is fixed with a steel plate (108). An insertion hole (109) for the insertion of the tension rod (300) is provided on the steel plate (108), and the core of the insertion hole (109) is aligned with the center of the gap space. A tension rod device is provided between the fronts of the two relatively distributed steel form side forms (100). The tension rod device is located at the upper end of the steel form side form (100) and is inserted through the steel plate (108). The tension rod device includes a tension rod (300), a nut (301), and a pressing block (302). The pressing block (302) is provided with a through hole and is fixed on one end face of the nut (301). The tension rod (300) is inserted through the insertion hole (109) of the steel plate (108) and is fixed by screwing the nut (301).

5. The anti-seepage steel formwork screw-free support system according to claim 1, characterized in that: [[ID=*1]]The connection unit (101) is arranged at the left and right ends of the steel form side form (100). The connection unit (101) includes a connecting plate (110) and a bolt (112). The connecting plate (110) is fixed at the left and right ends of the steel form side form (100). A bolt hole (111) is provided on the connecting plate (110). Adjacent steel form side forms (100) are connected and fixed through the bolt hole (111) on the connecting plate (110) and the bolt (112).

6. The anti-seepage steel formwork screw-free support system according to claim 2, characterized in that: The telescopic steel pipe support device includes support jacks (200) and steel pipes (201). There are two support jacks (200) and two steel pipes (201). A threaded support rod (202) is fixed on the back of the support jack (200). One end of the steel pipe (201) is sleeved on the threaded support rod (202), and a knob buckle (203) is installed between the threaded support rod (202) and the steel pipe (201). The knob buckle (203) is screwed on the threaded support rod (202), and the length adjustment of the steel pipe support device is realized by the clockwise and counterclockwise rotation of the knob buckle (203). The other ends of the two steel pipes (201) are both connected with an adjustment mechanism (204) through a connection component, and the length adjustment of the steel pipe support device after the formwork is pre-pressed is realized by the driving displacement of the adjustment mechanism (204). The centers of the support jack (200), the threaded support rod (202), the steel pipe (201), and the adjustment mechanism (204) are all on the same straight line.

7. The anti-seepage steel formwork screw-free support system according to claim 6, wherein: The support jack (200) is a steel "C"-shaped member. The opening of the support jack (200) faces the horizontal backing strip (102) on the steel formwork side form (100), and the opening is engaged with the horizontal backing strip (102). The threaded support rod (202) is located at the center position on the back of the support jack (200).

8. The anti-seepage steel formwork screw-free support system according to claim 6, characterized in that: The knob buckle (203) includes a knob (205) and a nut (206). The nut (206) is fixed at the center position of the knob (205). The knob buckle (203) is screwed to the threaded support rod (202) through the nut (206). One side of the nut (206) is flush with one side of the knob (205), and a bayonet (207) is formed between the other side of the nut (206) and the circumferential inner wall of the knob (205). The bayonet (207) abuts against one end of the steel pipe (201).

9. The anti-seepage steel formwork screw-free support system according to claim 6, characterized in that: The connecting assembly includes four flange plates (208). Two of the flange plates (208) are respectively fixed on the end faces of the other ends of the two steel pipes (201), and the other two flange plates (208) are respectively fixed on the bottom end and the top end of the adjusting mechanism (204). The adjacent flange plates (208) are fixedly connected by bolts.

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