Overwater abutment cast-in-place formwork supporting device

Abstract

A water abutment cast-in-place formwork supporting device belongs to the technical field of cast-in-place formwork supporting and comprises a bottom formwork, a secondary beam, a longitudinal main beam, a transverse main beam, an upper steel hoop and a lower steel hoop, the upper steel hoop and the lower steel hoop are installed on a steel pipe pile, the top of the lower steel hoop is tightly attached to the bottom of the upper steel hoop, the transverse main beam is installed on the upper steel hoop, and the transverse main beam is installed on the lower steel hoop. The longitudinal main beams are mounted on the transverse main beams, the secondary beams are mounted on the longitudinal main beams, and the bottom dies are fully paved on the secondary beams; the defects that in the prior art, the construction platform is difficult to dismantle due to the fact that the overwater abutment is tightly adhered to the construction platform after being poured, welding operation between the temporary bracket beam and the steel casing is too much, the installation and dismantling construction efficiency of the temporary bracket beam and the steel casing is low, and use of the overwater abutment cast-in-place formwork supporting device is greatly limited are effectively overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of cast-in-place formwork support, and in particular relates to a cast-in-place formwork support device for an overwater pier. Background Art

[0002] High-pile docks are widely used in port construction. Their supporting substations and mooring facilities require a stable and reliable support platform. Piers are usually selected as support platforms, which can provide better support. Piers are mainly constructed using cast-in-place construction technology. Since it is impossible to set up a ground support on the water, a cast-in-place formwork support for water construction is required for the piers.

[0003] The water pier is large in size and thickness, requiring the cast-in-place formwork support system to have sufficient strength and rigidity, as well as good stability. According to the actual construction conditions, cast-in-place formwork support systems in the form of steel bracket support and reverse hanging support have been produced. Among them, the patent application number is "CN202020078048.5" and the patent name is "Cast-in-place Pier Construction Platform". Figure 1 The structure shown is the most representative. In this structure, a temporary bracket beam is welded on the steel casing of the cast-in-place pile, and a hook bolt is set on the top surface of the steel casing. The end of the hook bolt passes through the bracket beam and is fixed by high-strength bolts to form a cast-in-place pier construction platform. This structure solves the working condition that the design elevation of the water pier is too low, provides a construction platform for the cast-in-place of the water pier, is relatively easy to install, and saves construction costs.

[0004] However, after the water pier is poured, it is tightly attached to the construction platform, making it difficult to remove the construction platform. At the same time, there are too many welding operations between the temporary bracket beam and the steel casing, and the installation and removal construction efficiency is low, which greatly limits the use of this cast-in-place formwork support system. Summary of the invention

[0005] In order to solve the defects in the prior art, the present invention provides a cast-in-place formwork support device for the water pier, which effectively avoids the defects in the prior art that the water pier is tightly adhered to the construction platform after casting, resulting in difficulty in dismantling the construction platform, too much welding work between the temporary bracket beam and the steel casing, and low installation and dismantling construction efficiency of the temporary bracket beam and the steel casing, which greatly limits the use of the cast-in-place formwork support device for the water pier.

[0006] The present invention utilizes the following technical solutions.

[0007] A cast-in-place formwork support device for an overwater pier, comprising: Lower steel hoop, upper steel hoop, longitudinal main beam, transverse main beam, secondary beam, bottom formwork and steel pipe piles; The lower steel hoop and the upper steel hoop are installed on the steel pipe piles of the pier pile foundation of the water pier; The longitudinal main beam is installed on the top of the upper steel hoop and is close to the steel pipe piles of the pier foundation of the water pier; The transverse main beam is installed on the longitudinal main beam and fixed by spot welding; the transverse main beams on both sides of the steel pipe piles are close to the steel pipe piles; The secondary beams are installed on the transverse main beams at equal intervals and fixed with wire ties, and the secondary beams are fully covered with bottom formwork.

[0008] Furthermore, the inner walls of the lower steel hoop and the upper steel hoop are tightly attached to the steel pipe pile and are fixedly connected with high-strength bolts.

[0009] Furthermore, the upper steel hoop is installed on the top of the lower steel hoop, and the supporting brackets of the upper steel hoop and the lower steel hoop are perpendicular to each other.

[0010] Furthermore, the longitudinal main beam and the upper steel hoop can be fixed by spot welding.

[0011] Furthermore, the transverse main beams are arranged at equal intervals.

[0012] Furthermore, the length and width of the bottom formwork are consistent with the length and width of the bottom of the pier, and is fixed to the secondary beam with iron nails.

[0013] Furthermore, a release agent is applied on the bottom mold.

[0014] Furthermore, the inner walls of the lower steel hoop and the upper steel hoop are closely attached to the steel pipe pile and are fixedly connected by high-strength bolts, which are fixedly connected by tightening through a sleeve, and the sleeve comprises: Handle, connecting piece and plug-in piece. The handle includes a handle, an extension strip and an assembly piece. The extension strip is fixedly connected to the handle to form a strip structure. The assembly piece is fixedly connected to the head wall of the extension strip farther from the handle. The connecting piece is pivotally connected to the assembly piece via a hinge. The plug-in piece is pivotally connected to the connecting piece via a hinge. The assembly piece and the plug-in piece are respectively arranged at the two ends of the connecting piece. When the midpoint of the connecting piece is regarded as the rotation center, the angle between the center line around which the plug-in piece rotates and the center line around which the assembly piece rotates is ninety degrees.

[0015] Furthermore, the connecting piece includes a pair of arc column head walls and two pairs of flat wall-shaped side walls, wherein each pair of side walls facing each other respectively transitions with a head wall with a rounded corner, and the pair of head walls of the connecting piece respectively face the assembly piece and the plug-in piece.

[0016] Furthermore, an assembly opening 1 is opened on the assembly plate, and the assembly opening 1 makes the outer shape of the assembly plate an arched structure with an open opening away from the handrail. One end of the connecting plate is pivotally connected to the assembly opening 1, and a pair of outer side walls of the connecting plate are attached to a pair of opposing inner side walls of the assembly opening 1.

[0017] Furthermore, the plug-in piece includes a positioning piece pivotally connected to the connecting piece, a positioning strip fixedly connected to the positioning piece, and a positioning head fixedly connected to the positioning strip. Here, the positioning piece is provided with an assembly opening No. 2, so that its appearance is an arched structure with an open opening facing the assembly piece. The other end of the connecting piece is pivotally connected to the assembly opening No. 2, and the other pair of side walls of the connecting piece are respectively attached to a pair of side walls facing each other at the end of the assembly opening No. 2.

[0018] Furthermore, a round-headed beryllium copper bar is fixedly connected to the assembly sheet, and the round-headed beryllium copper bar is arranged along the center line of the stretching bar. The section behind the round head of the round-headed beryllium copper bar is located in the assembly sheet, and the round head of the round-headed beryllium copper bar protrudes out of the assembly sheet through the first assembly opening and is attached to one end wall of the connecting sheet; a round-headed beryllium copper bar is also fixedly connected to the positioning sheet, and the section behind the round head of the round-headed beryllium copper bar is located in the positioning sheet, and the round head of the round-headed beryllium copper bar protrudes out of the positioning sheet through the second assembly opening and is attached to the other end wall of the connecting sheet, that is, a pair of round-headed beryllium copper bars are arranged facing each other on the assembly sheet and the positioning sheet.

[0019] Furthermore, the head wall of the assembly piece facing the positioning piece is ground to form an arched portion, and similarly, the head wall of the positioning piece facing the assembly piece is also ground to form an arched portion.

[0020] Furthermore, the positioning strip is tapered from the positioning piece to the positioning head. The tapered positioning strip can provide a wider observation area for the staff, and reduce the probability of the sleeve bumping against external objects. The positioning head is an arc-shaped column with a plurality of arched openings on the side wall. The head wall of the positioning head away from the positioning piece is a hexagonal column, and the side wall of the positioning head continues to round the transition and is mirrored. In addition, in order to allow the positioning head to be well combined with the high-strength bolt, the positioning head is tapered from the positioning strip to the other end.

[0021] The beneficial effect of the present invention is that, compared with the prior art, the upper steel hoop and the lower steel hoop of the present invention are arranged so that when the support system is dismantled, the installation height of the lower steel hoop can be lowered, thereby lowering the support system, so that the support device is separated from the bottom of the water pier, and the bottom form, secondary beam, transverse main beam and longitudinal main beam are pulled out in sequence, reducing the construction safety risk and improving the construction efficiency. At the same time, the double steel hoop arrangement makes the support system have better strength and rigidity, which can be applied to the cast-in-place construction of piers with large spans between piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a plan view of a cast-in-place pier construction platform in the prior art; Figure 2 It is a front view of the cast-in-place formwork support device for the water pier in the present invention; Figure 3 It is a cross-sectional view of the cast-in-place formwork support device for the water pier in the present invention; Figure 4is a three-dimensional schematic diagram of the sleeve in the present invention; Figure 5 is a three-dimensional schematic diagram of a partial structure of the sleeve in the present invention; Figure 6 It is a three-dimensional schematic diagram of the positioning head of the sleeve in the present invention. DETAILED DESCRIPTION

[0023] In the prior art, after the water pier is cast, it is tightly attached to the construction platform, which makes it difficult to remove the construction platform. At the same time, there are too many welding operations between the temporary bracket beam and the steel casing, and the installation and removal construction efficiency is low, which greatly limits the use of this cast-in-place formwork support system. The purpose of the present invention is to provide a water pier cast-in-place formwork support device with high strength and rigidity, good stability, simple structure, easy manufacture, convenient installation and removal, and safe and efficient construction.

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely expressed in combination with the drawings in the embodiments of the present invention. The embodiments expressed in this application are only embodiments of a part of the present invention, not all embodiments. According to the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0025] like Figures 1 to 5 As shown, the present invention provides a cast-in-place formwork support device for a water pier, comprising: The object of the present invention is to provide a cast-in-place formwork support device for an overwater pier which has high strength and rigidity, good stability, simple structure, easy manufacture, convenient installation and removal, and safe and efficient construction.

[0026] The inventive principle of the present invention is: The pile foundation of the water pier is composed of multiple rows of steel pipe piles. The cast-in-place formwork support system is composed of the bottom formwork, secondary beam, longitudinal main beam, transverse main beam, upper steel hoop and lower steel hoop from top to bottom. Two steel hoops are set to support the entire cast-in-place formwork construction platform. The upper and lower steel hoops are installed on the steel pipe piles and connected by high-strength bolts. The upper steel hoop is in close contact with the lower steel hoop, and the supporting brackets of the two are perpendicular to each other. During installation, the installation elevation of the steel hoop is calculated according to the bottom elevation of the pier. The lower steel hoop is installed first, then the upper steel hoop, and finally the transverse main beam, longitudinal main beam, secondary beam and bottom formwork are installed in sequence. After the water pier is cast, the cast-in-place formwork support is removed. When dismantling, first loosen all the high-strength bolts of the lower steel hoop, let the lower steel hoop drop 5~10cm, re-tighten the high-strength bolts, and then loosen the high-strength bolts of the upper steel hoop in turn, let the upper steel hoop drop to the top surface of the lower steel hoop, so that the entire cast-in-place formwork support is separated from the bottom of the pier, and the bottom form, secondary beam, longitudinal main beam and transverse main beam are removed in turn, and finally the upper steel hoop and lower steel hoop are removed. Through the setting of the upper steel hoop and the lower steel hoop, the gap with the bottom of the pier can be adjusted when the cast-in-place formwork support is removed, which reduces the difficulty of removal and ensures the efficiency and safety of the support removal construction.

[0027] The core scheme of the present invention is: The cast-in-place formwork supporting device for the water pier includes a bottom formwork, a secondary beam, a longitudinal main beam, a transverse main beam, an upper steel hoop and a lower steel hoop. The upper steel hoop and the lower steel hoop are installed on the steel pipe piles, the top of the lower steel hoop is close to the bottom of the upper steel hoop, the transverse main beam is installed on the upper steel hoop, the longitudinal main beam is installed on the transverse main beam, the secondary beam is installed on the longitudinal main beam, and the secondary beam is fully covered with the bottom formwork.

[0028] like Figure 2 to Figure 3 FIG. 1 is a schematic diagram of a specific implementation structure of the present invention. Figure 2 to Figure 3 The cast-in-place formwork support device for the water pier includes: It is composed of a lower steel hoop 1, an upper steel hoop 2, a longitudinal main beam 3, a transverse main beam 4, a secondary beam 5, a bottom formwork 6 and a steel pipe pile 7; The lower steel hoop 1 and the upper steel hoop 2 are installed on the steel pipe pile 7 of the pier pile foundation of the water pier; The longitudinal main beam 3 is installed on the top of the upper steel hoop 2 and is close to the steel pipe pile 7 of the pier pile foundation of the water pier; The transverse main beam 4 is installed on the longitudinal main beam 3 and fixed by spot welding; the transverse main beam 4 on both sides of the steel pipe pile 7 is close to the steel pipe pile 7; The secondary beams 5 are installed on the transverse main beam 4 at equal intervals and fixed with wire tying, and the secondary beams 5 are fully covered with bottom molds 6.

[0029] In a preferred but non-limiting embodiment of the present invention, the inner walls of the lower steel hoop 1 and the upper steel hoop 2 are tightly attached to the steel pipe pile 7 and are fixedly connected with high-strength bolts to ensure sufficient frictional resistance to resist the weight of the cast-in-place formwork support system and the pier.

[0030] In a preferred but non-limiting embodiment of the present invention, the upper steel hoop 2 is installed on the top of the lower steel hoop 1, and the supporting brackets of the upper steel hoop 2 and the lower steel hoop 1 are perpendicular to each other.

[0031] In a preferred but non-limiting embodiment of the present invention, the longitudinal main beam 3 and the upper steel hoop 2 can be fixed by spot welding.

[0032] In a preferred but non-limiting embodiment of the present invention, the transverse main beams 4 are arranged at equal intervals.

[0033] In a preferred but non-limiting embodiment of the present invention, the length and width of the bottom mold 6 are consistent with the length and width of the bottom of the pier, and is fixed to the secondary beam 5 with iron nails.

[0034] In a preferred but non-limiting embodiment of the present invention, a release agent is applied to the bottom mold 6 to prevent the pier from sticking to the bottom mold 6 after casting and forming, and to ensure the smoothness of the bottom surface of the pier.

[0035] The transverse main beam and the longitudinal main beam are fixed by spot welding, but iron wire binding can also realize the present invention, so the spot welding fixing method is an alternative.

[0036] The advantages of the present invention are: 1. The setting of upper steel hoop and lower steel hoop can adjust the installation height of lower steel hoop when the support is removed, reduce the installation height of cast-in-place formwork support, make the cast-in-place formwork support system separate from the bottom of the pier, create enough demolition gap, and realize safe and efficient demolition.

[0037] 2. The design of upper and lower steel hoops gives the cast-in-place formwork support system better strength and rigidity, making it suitable for cast-in-place construction of piers with large spans between piles.

[0038] The inner walls of the lower steel hoop 1 and the upper steel hoop 2 are tightly attached to the steel pipe pile 7 and are fixedly connected with high-strength bolts. When using high-strength bolts for fixing, a sleeve is used to put the high-strength bolt into the head of the sleeve, and the head of the sleeve is rotated to an arc matching the steel pipe pile, and then the high-strength bolt is placed at the place where it is to be tightened, and finally the high-strength bolt is tightened to achieve the fixing function.

[0039] However, since the current sleeve adopts a method of combining the sizes of the structures to avoid the loosening of the sleeve head, the sizes of the structures will change due to blockage and aging after a certain period of use. The sleeve head often becomes loose, and it is not easy to fix the sleeve head at a certain arc, which means it is not suitable for screwing in high-strength bolts.

[0040] In a preferred but non-limiting embodiment of the present invention, the inner walls of the lower steel hoop 1 and the upper steel hoop 2 are tightly attached to the steel pipe pile 7 and are fixedly connected by high-strength bolts, which are fixedly connected by tightening the sleeve. Figures 4 to 6 As shown, the sleeve contains: Handle 8, connecting piece 9 and plug-in piece 10. The handle 8 includes a handle 18, an extension strip 19 and an assembly piece 20. The extension strip 19 is fixedly connected to the handle 18 to form a strip-shaped structure. The assembly piece 20 is fixedly connected to the head wall of the extension strip 19 which is farther from the handle 18. The connecting piece 9 is pivotally connected to the assembly piece 20 via a hinge. The plug-in piece 10 is pivotally connected to the connecting piece 9 via a hinge. The assembly piece 20 and the plug-in piece 10 are respectively arranged at the two ends of the connecting piece 9. When the midpoint of the connecting piece 9 is regarded as the rotation center, the angle between the center line around which the plug-in piece 10 rotates and the center line around which the assembly piece 20 rotates is ninety degrees.

[0041] In a preferred but non-limiting embodiment of the present invention, the connecting piece 9 includes a pair of arc-shaped column head walls and two pairs of flat side walls, wherein each pair of side walls facing each other respectively transitions with a head wall with a rounded corner. When the connecting piece 9 is arranged along the center line of the handle 8, the pair of head walls of the connecting piece 9 respectively face the assembly piece 20 and the plug-in piece 10.

[0042] In a preferred but non-limiting embodiment of the present invention, an assembly opening 21 is opened on the assembly sheet 20, and the assembly opening 21 allows the outer shape of the assembly sheet 20 to be an arched structure with an open opening facing away from the handrail 18. One end of the connecting sheet 9 is pivotally connected to the assembly opening 21, and a pair of outer side walls of the connecting sheet 9 are attached to a pair of opposing inner side walls of the assembly opening 21.

[0043] In a preferred but non-restrictive embodiment of the present invention, the plug-in piece 10 includes a positioning piece 38 pivotally connected to the connecting piece 9, a positioning strip 39 fixedly connected to the positioning piece 38, and a positioning head 40 fixedly connected to the positioning strip 39. Here, the positioning piece 38 is provided with an assembly opening 41 so that its appearance is an arch-shaped structure with an open opening facing the assembly piece 20. The other end of the connecting piece 9 is pivotally connected to the assembly opening 41, and the other pair of side walls of the connecting piece 9 are respectively attached to a pair of side walls of the assembly opening 41 that face each other.

[0044] In a preferred but non-limiting embodiment of the present invention, a round-headed beryllium copper strip 11 is fixedly connected to the assembly sheet 20, and the round-headed beryllium copper strip 11 is arranged along the center line of the stretching strip 19. The section behind the round head of the round-headed beryllium copper strip 11 is located in the assembly sheet 20, and the round head of the round-headed beryllium copper strip 11 protrudes out of the assembly sheet 20 through the assembly opening 21 and is attached to one end wall of the connecting sheet 9; the positioning sheet 38 is also fixedly connected to the round-headed beryllium copper strip 11, and the section behind the round head of the round-headed beryllium copper strip 11 is located in the positioning sheet 38. The round head of the head-shaped beryllium copper strip 11 protrudes out of the positioning piece 38 through the second assembly opening 41 and is attached to the other end wall of the connecting piece 9, that is, a pair of round-headed beryllium copper strips 11 are arranged on the assembly piece 20 and the positioning piece 38 facing each other, and the center line around which the positioning piece 38 rotates is parallel to the center line of the head wall of the connecting piece 9 with the shortest distance thereto, and the center line around which the assembly piece 20 rotates is parallel to the center line of the head wall of the connecting piece 9 with the shortest distance thereto, and the connecting piece 9 respectively gives the moving surfaces of the pair of round-headed beryllium copper strips 11 to be continuous and smooth inverted arch shapes.

[0045] In a preferred but non-limiting embodiment of the present invention, the head wall of the assembly sheet 20 facing the positioning sheet 38 is ground to form an arched portion 22, which is used to reduce the chance of scratches on the edge after colliding with external objects. Similarly, the head wall of the positioning sheet 38 facing the assembly sheet 20 is also ground to form an arched portion.

[0046] In a preferred but non-limiting embodiment of the present invention, the positioning strip 39 is tapered from the positioning piece 38 to the positioning head 40. The tapered positioning strip 39 can provide a wider observation area for the staff and reduce the probability of the sleeve bumping against external objects. The positioning head 40 is an arc-shaped column with a plurality of arched openings 42 on the side wall. The head wall of the positioning head 40 away from the positioning piece 38 is a hexagonal column, and the side wall of the positioning head 40 continues to round the transition and is mirrored. In addition, in order to allow the positioning head 40 to be well combined with the high-strength bolt, the positioning head 40 is tapered from the positioning strip 39 to the other end.

[0047] During the period when the high-strength bolt is tightened, the connecting piece is pulled by rotating the handle to tighten the high-strength bolt. Through the assembly port one, the connection tightness between the connecting piece and the assembly piece can be strengthened. Through the inner surface of the assembly port one, the connecting piece is pressed against the connecting piece, and the force at the pivotal joint between the connecting piece and the assembly piece is reduced, thereby increasing the service life. Through the assembly port two, the connection tightness between the connecting piece and the plug-in piece can be strengthened. Through the inner surface of the assembly port two, the connecting piece is pressed against the connecting piece, and the force at the pivotal joint between the connecting piece and the plug-in piece is reduced, thereby increasing the service life. Because the plug-in piece is directly connected to the high-strength bolt, the plug-in piece is closer to external objects. The size of the plug-in piece can be reduced through the tapered positioning strip, reducing the probability of the plug-in piece colliding with external objects, and providing the staff with a wider observation range, which is convenient for the staff to perform the tightening operation of the high-strength bolt.

[0048] The round head of the round-headed beryllium copper strip is arranged to face the connecting piece, and the round head of the round-headed beryllium copper strip can move unhindered on the head wall and the side wall of the connecting piece, and the round head of the round-headed beryllium copper strip can be firmly attached to the side wall of the connecting piece due to the elastic effect, and the resistance effect caused by the rotation of the connecting piece can be increased by increasing the squeezing effect, so that the connecting piece can be stabilized on an arc.

[0049] The continuous and flat outer surface of the connecting piece allows the round head of the round-headed beryllium copper strip to move without obstacles, and is convenient for the staff to fix the plug-in piece in an arc.

[0050] When tightening the high-strength bolt, the curvature between the high-strength bolt and the handle also changes according to the specific situation. When using it, the staff puts the high-strength bolt on the head wall of the connector, so that the open hoop on the high-strength bolt is connected to the end of the connector with an opening, and then rotates the connector and the connector to rotate the high-strength bolt to the set curvature. At this time, a pair of elastic parts are respectively attached to the two ends of the connector, that is, the resistance between the connector and the handle and the connector is increased by increasing the extrusion effect, so that the connector can be stably maintained at the current curvature, and then the head of the high-strength bolt is attached to the place to be screwed in, and the staff rotates the handle to tighten the connector. The handle can achieve the screwing of the high-strength bolt; the head of the current sleeve is mostly flat and not thick, and the edge of the head wall of the locating head after the arched mouth is opened is an arc column, and the thickness is larger than the existing technology. Therefore, after a certain period of use, the current sleeve will slip due to wear and tear, and the locating head has an outer surface of the arc column, so the point where the locating head is in contact with the inner surface of the groove of the high-strength bolt head wall is not the point closest to the angle of the high-strength bolt head wall. Therefore, after the locating head is damaged, there will still be a lot of structures in contact with the high-strength bolt head wall, reducing the probability of slipping due to failure to tighten.

[0051] The beneficial effect of the present invention is that, compared with the prior art, the upper steel hoop and the lower steel hoop of the present invention are arranged so that when the support system is dismantled, the installation height of the lower steel hoop can be lowered, thereby lowering the support system, so that the support device is separated from the bottom of the water pier, and the bottom form, secondary beam, transverse main beam and longitudinal main beam are pulled out in sequence, reducing the construction safety risk and improving the construction efficiency. At the same time, the double steel hoop arrangement makes the support system have better strength and rigidity, which can be applied to the cast-in-place construction of piers with large spans between piles.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention should be covered within the protection space of the claims of the present invention.

Claims

1. A cast-in-place formwork support device for a water pier, characterized in that: include: Lower steel hoop, upper steel hoop, longitudinal main beam, transverse main beam, secondary beam, bottom formwork and steel pipe piles; The lower steel hoop and the upper steel hoop are installed on the steel pipe piles of the pier pile foundation of the water pier; The longitudinal main beam is installed on the top of the upper steel hoop and is close to the steel pipe piles of the pier foundation of the water pier; The transverse main beam is installed on the longitudinal main beam and fixed by spot welding; the transverse main beams on both sides of the steel pipe piles are close to the steel pipe piles; The secondary beams are installed on the transverse main beams at equal intervals and fixed with wire ties, and the secondary beams are fully covered with bottom formwork.

2. The cast-in-place formwork support device for an overwater pier according to claim 1, characterized in that: The inner walls of the lower steel hoop and the upper steel hoop are tightly attached to the steel pipe pile and are fixedly connected with high-strength bolts.

3. The cast-in-place formwork support device for an overwater pier according to claim 2, characterized in that: The upper steel hoop is installed on the top of the lower steel hoop, and the supporting brackets of the upper steel hoop and the lower steel hoop are perpendicular to each other.

4. The cast-in-place formwork support device for an overwater pier according to claim 3, characterized in that: The longitudinal main beam and the upper steel clamp can be fixed by spot welding.

5. The cast-in-place formwork support device for an overwater pier according to claim 4, characterized in that: The transverse main beams are arranged at equal intervals.

6. The cast-in-place formwork support device for an overwater pier according to claim 5, characterized in that: The length and width of the bottom formwork are consistent with the length and width of the bottom of the pier, and it is fixed to the secondary beam with iron nails.

7. The cast-in-place formwork support device for an overwater pier according to claim 6, characterized in that: Apply release agent on the bottom mold.

8. The cast-in-place formwork support device for an overwater pier according to claim 7, characterized in that: The inner walls of the lower steel hoop and the upper steel hoop are tightly attached to the steel pipe pile and are fixed with high-strength bolts. The high-strength bolts are fixed by tightening the sleeve. The sleeve includes: Handle, connector and plug-in plate, The handrail includes a handle, an extension strip and an assembly piece. The extension strip is fixedly connected to the handle to form a strip structure. The assembly piece is fixedly connected to the head wall of the extension strip farther from the handle. The connecting piece is pivotally connected to the assembly piece via a hinge. The plug-in piece is pivotally connected to the connecting piece via a hinge. The assembly piece and the plug-in piece are respectively arranged at the two ends of the connecting piece. When the midpoint of the connecting piece is regarded as the rotation center, the angle between the center line around which the plug-in piece rotates and the center line around which the assembly piece rotates is ninety degrees.

9. The cast-in-place formwork support device for an overwater pier according to claim 8, characterized in that: The connecting piece comprises a pair of arc column head walls and two pairs of flat wall-shaped side walls, wherein each pair of side walls facing each other respectively transitions with a head wall with rounded corners, and a pair of head walls of the connecting piece respectively face the assembly piece and the plug-in piece.

10. The cast-in-place formwork support device for an overwater pier according to claim 9, characterized in that: The assembly plate is provided with an assembly opening 1, which makes the outer shape of the assembly plate an arched structure with an open opening away from the handrail. One end of the connecting plate is pivotally connected in the assembly opening 1, and a pair of outer side walls of the connecting plate are attached to a pair of opposite inner side walls of the assembly opening 1.

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