Self-drainage formwork and maintenance device for UHPC reinforced rectangular bridge pier

Abstract

The invention relates to the technical field of building construction, and discloses a self-drainage formwork erecting and maintaining device for a UHPC reinforced rectangular pier, the self-drainage formwork erecting and maintaining device comprises a bottom-layer main body mold, a bottom-layer inner side formwork, an upper-layer main body mold, an upper-layer inner side formwork and bolts, the upper-layer main body mold is provided with a formwork opening mechanism, and the upper-layer main body mold is provided with an adjusting mechanism; a water pumping mechanism is arranged on one side of the bottom-layer main body mold; the adjusting mechanism comprises a cover plate mechanism and a water inlet control assembly, buckles are fixedly connected to the peripheries of the tops of the bottom-layer main body mold and the upper-layer main body mold, a moving seam is formed in a cover plate, telescopic covers are arranged on the periphery of the bottom of the cover plate, and protrusions are fixedly connected to the periphery of the bottom of the bottom-layer inner side mold plate. According to the self-drainage formwork erecting and maintaining device for the UHPC reinforced rectangular pier, the bottom-layer main body mold and the upper-layer main body mold are both provided with holes, the holes are used in cooperation with water control rods to control inflow and outflow of water, and finally the holes extend to the upper face of the cover plate mechanism to control inflow and outflow of water.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers. Background Art

[0002] In recent years, with the development of economy, the process of urbanization has gradually accelerated, the traffic demand has also increased sharply, and some high-rise buildings and highway bridges have also increased sharply. However, these infrastructures will be damaged by some factors.

[0003] Although traditional bridge reinforcement methods can improve the bearing capacity of the structure to a certain extent, they often face problems such as complex construction, long construction period and insufficient durability. These methods may increase the deadweight of the structure in actual application and cause secondary damage. Many bridge piers are located underwater, making reinforcement construction difficult.

[0004] Ultra-high performance concrete (UHPC) is a new type of building material. At the same time, UHPC has excellent crack resistance and toughness, and can effectively resist the erosion of the external environment and the development of cracks caused by stress concentration. Compared with traditional concrete, UHPC is also more durable and can maintain good structural performance in extreme climates and corrosive environments. These advantages make UHPC an ideal choice for bridge pier reinforcement.

[0005] However, UHPC is difficult to maintain. If the maintenance is not timely or the temperature does not reach the designed maintenance temperature, the strength of UHPC cannot reach the designed value and quality defects such as cracking and surface water loss will occur during the hardening process of UHPC. In addition, it is difficult to reinforce the pier underwater and the construction quality is difficult to ensure, which affects the bearing capacity of the reinforced concrete structure.

[0006] Based on this, the present invention designs a self-draining formwork and maintenance device for UHPC reinforced rectangular piers, which is convenient for formwork and has both construction and maintenance functions. Summary of the invention

[0007] The object of the present invention is to provide a self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-draining formwork and maintenance device for UHPC reinforced rectangular piers, comprising a bottom main body mold, a bottom inner side template, an upper main body mold, an upper inner side template and bolts, the pumping mechanism is threadedly connected to the bottom main body mold through bolts, the upper main body mold is provided with a template support mechanism, the upper main body mold is provided with an adjustment mechanism, one side of the bottom main body mold is provided with a pumping mechanism, the air (water) inlet pipe is connected to the template support mechanism through an air (water) inlet, and the air outlet water pipe is connected to the bottom main body mold through an air outlet water port provided on the bottom main body mold; The regulating mechanism comprises a cover plate mechanism and a water inlet control component, and the water inlet control component is arranged on one side of the cover plate mechanism; The cover plate mechanism includes a blind hole, which is provided around the upper inner template and the bottom inner template, a connecting rod is inserted into the blind hole, the bottom main body mold and the upper main body mold are fixedly connected with buckles around the top, a cover plate is provided on the top of the upper main body mold, and the upper main body mold and the cover plate are provided with a card slot around the bottom, a first hole is provided at the bottom of the cover plate, the bottom main mold and the upper main mold are provided with a movable seam, a telescopic cover is provided around the bottom of the cover plate, the telescopic cover is provided on one side of the card slot provided at the bottom of the cover plate, and a protrusion is fixedly connected with the bottom of the bottom inner template.

[0009] Preferably, the bottom of the slot is set to be an opening, the inside of the slot is plugged with the buckle surface, the bottom body template is provided with a water outlet, the water outlet is used in conjunction with a pumping device to pump water out, the bottom body mold is provided with an air outlet, the air outlet is used in conjunction with an air outlet water pipe, the bottom body mold is provided with a hole, the hole is used in conjunction with a water control rod to control the entry and exit of water, the inside of the bottom body mold can be equipped with a heating pipe to heat the water, the top of the bottom body mold is provided with a buckle, the number of the buckles is two, the buckle is used in conjunction with the slot provided by the upper upper body mold, the slot is used in conjunction with the buckle provided by the lower upper body mold or the bottom body mold to ensure that it is a whole, the cover plate is provided with a hole, the hole is used in conjunction with a water control rod to control the entry of water, the cover plate is provided with a movable gap, a telescopic cover is arranged in the movable gap, the telescopic cover is used in conjunction with a connecting rod to prevent steam from escaping.

[0010] Preferably, there are two cover plates, and the two cover plates are threadedly connected by bolts.

[0011] Preferably, the water inlet control assembly includes a heating tube and a ball valve, the heating tube is fixedly connected to one side of the inner wall of the bottom main body mold, the ball valve is provided with a hole, a water control rod is fixedly connected to one side of the ball valve, the bottom of the water control rod is fixedly connected to the water control valve, the ball valve is provided with a hole, an external rod can be inserted therein, the purpose is to be able to smoothly adjust the water inlet control device to control the inflow and outflow of water, and the water control rod needs to be determined according to the number of layers of the main body mold.

[0012] Preferably, the pumping mechanism includes a base, which is threadedly connected to the lower end of one side of the bottom main body mold by bolts, a roller is provided on one side of the top of the base, and a belt is connected to the surface of the roller for transmission, one side of the roller is fixedly connected to a transmission rod 2, and the other side of the transmission rod 2 is fixedly connected to a transmission crank, one side of the transmission crank is threadedly connected to a first rotating bolt, the other side of the first rotating bolt is connected to a transmission rod 3, and the other side of the transmission rod 3 is connected to a piston with the first rotating bolt, a water diversion pipe is threadedly connected to the bottom main body mold by bolts, a water diversion valve is threadedly connected to the bottom main body mold by bolts, a piston cover is threadedly connected to the inner ring of the piston, a sealing ring is clamped between the piston and the piston cover, a water stop valve is threadedly connected to the bottom main body mold by bolts, and the water diversion pipe is arranged on the water diversion valve, the piston cover, the sealing ring and the piston surface.

[0013] Preferably, the number of water diversion valves connected to the piston by bolts is two, the inner side of the piston is provided with threads, the piston cover is provided with holes, the piston and the piston cover are used in conjunction with each other, a sealing ring is clamped between the two, the sealing ring is used in conjunction with a water diversion pipe, and the water diversion pipe creates pressure in the water diversion pipe through the piston to divert water.

[0014] Preferably, the number of the bottom body molds is two, and the two bottom body molds are threadedly connected by bolts, the bolts have two layers, a slide groove is opened at the bottom of the bottom body mold, and an air outlet is opened at the bottom of the bottom body mold.

[0015] Preferably, the template opening mechanism includes a base and a roller, the base is arranged at the top of the upper main body mold, a slide rail is opened at the bottom of the base, the roller is clamped on the bottom main body mold through the slide rail, a slider is slidably connected inside the slide rail, a semi-ring rotating device is arranged at the bottom of the base, a connecting rod 1 is arranged at the bottom of the semi-ring rotating device, a second rotating bolt is threadedly connected to the connecting rod 1 and the inside of the slider, and the bottom of the slider and the top of the connecting rod are fixedly connected.

[0016] Preferably, the number of the bases is two, the bases are threadedly connected by bolts, and the bases are provided with four air inlets.

[0017] Preferably, the roller is provided, and when the roller and the slide rail cooperate, the protrusion on the inner side template of the bottom layer can be stuck therein and slide therein.

[0018] Preferably, the number of the semi-ring rotating devices is two, and the semi-ring rotating devices are threadedly connected by bolts. The semi-ring rotating devices are used in conjunction with the base and are placed on the base for rotation. The number of the connecting rods is four, and the connecting rods are provided with two second holes. The number of the sliders is four, and the sliders are provided with two second holes.

[0019] Compared with the prior art, the present invention provides a self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers, which has the following beneficial effects: 1. The self-draining formwork and maintenance device for UHPC reinforced rectangular piers has a water outlet in the bottom main formwork, which is used in conjunction with a pumping device to pump out water, an air outlet in the bottom main mold, which is used in conjunction with an air outlet water pipe, and a hole in the bottom main mold, which is used in conjunction with a water control rod to control the inflow and outflow of water.

[0020] 2. The self-draining formwork and maintenance device for UHPC reinforced rectangular piers uses a hole in conjunction with a water control rod to control water entry, a movable gap is opened on the cover plate, a telescopic cover is placed in the movable gap, and the telescopic cover is used in conjunction with a connecting rod to prevent steam from escaping.

[0021] 3. The self-draining formwork and maintenance device for UHPC reinforced rectangular piers has holes on both sides of the piston, the piston is used in conjunction with a water diversion valve, the inner side of the piston is provided with threads, the piston cover is provided with holes, the holes are used in conjunction with the water diversion valve to draw out water, the outer side of the piston cover is provided with threads, the piston is used in conjunction with the piston cover, the sealing ring is clamped between the two, the sealing ring is used in conjunction with the water diversion pipe to draw out water. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor: Figure 1 It is the overall structure diagram of the present invention; Figure 2 The main mold diagram of the present invention Figure 3 This is the inner template diagram; Figure 4 This is the main mold diagram of the bottom and upper layers.

[0023] Figure 5 It is the slide rail diagram; Figure 6 Draw the mechanism diagram for the inner template support.

[0024] Figure 7 It is a schematic diagram of the pumping mechanism; Figure 8 For the flow chart.

[0025] In the figure: 1, bottom body mold; 11, bottom inner template; 2, bolt; 3, pumping mechanism; 31, water stop valve; 32, sealing ring; 33, piston; 34, base; 35, roller; 36, transmission rod 2; 37, transmission crank; 38, first rotating bolt; 39, transmission rod 3; 301, water diversion valve; 302, water diversion pipe; 303, piston cover; 304, belt; 4, air outlet; 5, adjustment mechanism; 51, cover plate mechanism; 511, blind hole; 512, buckle; 513, cover plate; 514 , telescopic cover; 515, slot; 516, first hole; 517, connecting rod; 518, protrusion; 52, water inlet control assembly; 521, heating pipe; 522, ball valve; 523, water control rod; 524, water control valve; 6, template opening mechanism; 61, second rotating bolt; 62, connecting rod one; 63, slider; 64, slide rail; 65, second hole; 66, semi-ring rotating device; 67, slide groove; 68, roller; 69, base; 7, upper main body mold; 71, upper inner template; 8, air inlet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention provides the following technical solutions: Embodiment 1, combined with Figure 1 to Figure 1A self-draining formwork and maintenance device for UHPC reinforced rectangular piers, comprising a bottom main body mold 1, a bottom inner side mold 11, an upper main body mold 7, an upper inner side mold 71 and bolts 2, a pumping mechanism 3 is threadedly connected to the bottom main body mold 1 through the bolts 2, a mold opening mechanism 6 is provided on the upper main body mold 7, an adjustment mechanism 5 is provided on the upper main body mold 7, a pumping mechanism 3 is provided on one side of the bottom main body mold 1, an air (water) inlet pipe is connected to the mold opening mechanism 6 through an air (water) inlet 8, and an air outlet water pipe is connected to the bottom main body mold 1 through an air outlet water port 4 provided on the bottom main body mold 1; The regulating mechanism 5 includes a cover mechanism 51 and a water inlet control component 52, and the water inlet control component 52 is arranged on one side of the cover mechanism 51; The cover plate mechanism 51 comprises a blind hole 511, which is provided around the upper inner template 71 and the bottom inner template 11, a connecting rod 517 is inserted inside the blind hole 511, buckles 512 are fixedly connected around the top of the bottom main body mold 1 and the upper main body mold 7, a cover plate 513 is provided on the top of the upper main body mold 7, a slot 515 is provided around the bottom of the upper main body mold 7 and the cover plate (513), a first hole 516 is provided at the bottom of the cover plate 513, the bottom main body mold 1 and the upper main body mold 7, a movable seam is provided on the cover plate 513, a telescopic cover 514 is provided around the bottom of the cover plate 513, the telescopic cover 514 is provided on one side of the slot 515 provided at the bottom of the cover plate 513, and a protrusion 518 is fixedly connected around the bottom of the bottom inner template 11; The bottom of the card slot 515 is set to be open, the inside of the card slot 515 and the surface of the buckle 512 are plugged, the number of cover plates 513 is two, and the two cover plates 513 are threadedly connected by bolts 2; The water inlet control assembly 52 includes a heating tube 521 and a ball valve 522. The heating tube 521 is fixedly connected to one side of the inner wall of the bottom main body mold 1. A hole is opened on the ball valve 522. A water control rod 523 is fixedly connected to one side of the ball valve 522. A water control valve 524 is fixedly connected to the bottom of the water control rod 523.

[0029] Furthermore, the hole is used in conjunction with the water control rod 523 to control the entry of water, the cover plate is provided with a movable slot, a telescopic cover is arranged in the movable slot, and the telescopic cover is used in conjunction with the connecting rod to prevent the escape of steam.

[0030] Example 2, see Figure 1-6On the basis of the first embodiment, the pumping mechanism 3 further comprises a base 34, the base 34 is threadedly connected to the lower end of one side of the bottom main body mold 1 through a bolt 2, a roller 35 is arranged on one side of the top of the base 34, a belt 304 is connected to the surface of the roller 35, a transmission rod 2 36 is fixedly connected to one side of the roller 35, a transmission crank 37 is fixedly connected to the other side of the transmission rod 2 36, a first rotating bolt 38 is threadedly connected to one side of the transmission crank 37, a transmission rod 39 is connected to the other side of the first rotating bolt 38, and a transmission rod 39 is connected to the transmission rod 39. The other side of the piston 33 is threadedly connected to the first rotating bolt 38, the bottom main body mold 1 is threadedly connected to a water diversion pipe 302 through a bolt 2, the bottom main body mold 1 is threadedly connected to a water diversion valve 301 through a bolt 2, the inner ring of the piston 33 is threadedly connected to a piston cover 303, a sealing ring 32 is clamped between the piston 33 and the piston cover 303, the bottom main body mold 1 is threadedly connected to a water stop valve 31 through a bolt 2, and the water diversion pipe 302 is arranged on the surface of the water diversion valve 301, the piston cover 303, the sealing ring 32 and the piston 33; There are two water diversion valves 301 connected to the piston 33 by bolts 2, the inner side of the piston 33 is provided with threads, the piston cover 303 is provided with holes, the number of the bottom body molds 1 is two, the two bottom body molds 1 are threadedly connected by bolts 2, the bolts 2 have two layers, the bottom of the bottom body mold 1 is provided with a slide groove 67, and the bottom body mold 1 is provided with an air outlet 4.

[0031] Furthermore, holes are opened on both sides of the piston, the piston is used in conjunction with the water diversion valve, the inner side of the piston is provided with threads, the piston cover is provided with holes, the holes are used in conjunction with the water diversion valve to lead out water, the outer side of the piston cover is provided with threads, the piston is used in conjunction with the piston cover, the sealing ring is clamped between the two sealing rings and the water diversion pipe is used to lead out water Example 3, see Figure 1-8 , and on the basis of the first embodiment, the template opening mechanism 6 further comprises a base 69 and a roller 68, the base 69 is arranged on the top of the upper main body mold 7, a slide rail 64 is provided at the bottom of the base 69, the roller 68 is clamped on the bottom main body mold 1 through the slide rail 64, a slider 63 is slidably connected inside the slide rail 64, a semi-ring rotating device 66 is provided at the bottom of the base 69, a connecting rod 62 is provided at the bottom of the semi-ring rotating device 66, a second rotating bolt 61 is threadedly connected inside the connecting rod 62 and the slider 63, and the bottom of the slider 63 is fixedly connected to the top of the connecting rod 517; There are two bases 69, which are threadedly connected by bolts 2. There are four air inlet ports 8 on the base 69. There are two semi-ring rotating devices 66, which are threadedly connected by bolts 2. The semi-ring rotating devices 66 are used in conjunction with the base 69 and are placed on the base 69 for rotation. There are four connecting rods 62, which have two second holes 65. There are four sliders 63, which have two second holes 65.

[0032] Furthermore, the bottom body template has a water outlet, which is used in conjunction with a pumping device to pump out water, the bottom body mold has an air outlet, which is used in conjunction with an air outlet water pipe, and the bottom body mold has holes, which are used in conjunction with a water control rod to control the inflow and outflow of water.

[0033] S1. Prefabricated mold: Design the mold size and prefabricate the mold size according to the requirements, actual site conditions and reinforcement requirements; S2. Cleaning the site and old bridge piers: In order to facilitate the construction, the site needs to be leveled. In order to ensure the bonding effect between the ultra-high performance concrete UHPC and the square bridge piers and ensure effective reinforcement, the surface of the old bridge piers to be reinforced should be roughened and cleaned to remove dust, oil, peeling and loose layers on the surface, or some possible harmful substances: S3. Wetting treatment: The concrete surface needs to be moderately moistened, but excessive moisture should be avoided, as this may lead to a decrease in interfacial adhesion. Wetting treatment helps to improve the adhesion between the old concrete and the ultra-high performance concrete UNPC; S4. De-moulding machine: transport the prefabricated mould to the construction site. In order to ensure that the movable formwork can move smoothly and be demoulded in the end during the curing process, and to ensure that it will not get stuck and cause the curing process to be unable to proceed smoothly, it is necessary to apply a demoulding agent on the innermost side of the bottom main mould and the upper main mould.

[0034] S5. Installing molds and pouring: Use bolts to fit and connect the two bottom main molds, install the bottom inner template on the roller, install the pumping device, and then install the upper main mold on the bottom main mold through the buckle and slot, and install the second inner template on the lower inner template through the connecting rod. If multiple layers are required, repeat the operation steps of the upper main mold and the upper inner template, and then install the cover mechanism, water inlet control device and inner template support mechanism in turn, and then pour the ultra-high performance concrete UHPC through the air inlet into the space between the inner template and the pier. After pouring, install the air inlet and air outlet pipes. You can also open the water inlet control device to put in water for heating and water curing.

[0035] S6. Curing treatment: After the ultra-high performance concrete UHPC solidifies, the inner formwork is separated from the ultra-high performance concrete UHPC through the inner formwork support mechanism, and then hot water or steam is introduced from the outside for curing. Water can also be added through the water inlet control device and heated by the heating wire for curing to ensure that the ultra-high performance concrete UHPC has sufficient strength; S7. Maintenance completed: After the maintenance is completed, the mold will be removed and the reinforcement construction work of the single pier will be completed.

[0036] In actual operation, when the device is used, the bottom body mold 1 is provided with an air outlet 4, which is used in conjunction with the pumping mechanism 3 to pump water out, the bottom body mold 1 is provided with an air outlet 4, which is used in conjunction with the air outlet water pipe, and the bottom body mold 1 is provided with a hole, which is used in conjunction with the water control rod 523 to control the inlet and outlet of water; The hole cooperates with the water control rod 523 to control the water inlet, the cover plate 513 is provided with a movable slot, a telescopic cover 514 is arranged in the movable slot, and the telescopic cover 514 cooperates with the connecting rod 517 to prevent the steam from escaping; There are holes on both sides of the piston 33, and the piston 33 is used in conjunction with the water diversion valve 301. The inner side of the piston 33 is provided with threads, and the piston cover 303 is provided with holes. The holes are used in conjunction with the water diversion valve 301 to divert water. The outer side of the piston cover 303 is provided with threads, and the piston 33 is used in conjunction with the piston cover 303. On the one hand, the water diversion valve 301 is connected to the piston cover 303 by bolts 2, and on the other hand, the two water diversion valves 301 are connected to both sides of the piston 33 by bolts 2, so that water can only go out but not in. The sealing ring 32 is stuck between the piston 33 and the piston cover 303. At this time, the entire water diversion valve 301, the piston cover 303, the sealing ring 32, and the piston 33 are connected as a whole and placed in the water diversion pipe 302 to create a pressure difference and achieve the purpose of discharging water.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers, comprising a bottom main body mold (1), a bottom inner side mold (11), an upper main body mold (7), an upper inner side mold (71) and bolts (2), characterized in that: The pumping mechanism (3) is threadedly connected to the bottom main body mold (1) via bolts (2); a template opening mechanism (6) is provided on the upper main body mold (7); an adjustment mechanism (5) is provided on the upper main body mold (7); a pumping mechanism (3) is provided on one side of the bottom main body mold (1); the air (water) inlet pipe is connected to the template opening mechanism (6) via an air (water) inlet (8); and the air (water) outlet pipe is connected to the bottom main body mold (1) via an air (water) outlet (4) provided on the bottom main body mold (1); The regulating mechanism (5) comprises a cover plate mechanism (51) and a water inlet control component (52), wherein the water inlet control component (52) is arranged on one side of the cover plate mechanism (51); The cover plate mechanism (51) comprises a blind hole (511), the blind hole (511) being arranged on the periphery of the interior of the upper inner template (71) and the bottom inner template (11), a connecting rod (517) being inserted into the interior of the blind hole (511), buckles (512) being fixedly connected on the periphery of the top of the bottom main body mold (1) and the upper main body mold (7), a cover plate (513) being arranged on the top of the upper main body mold (7), and the bottom four of the upper main body mold (7) and the cover plate (513) being fixedly connected on the periphery of the top of the bottom main body mold (1). A card slot (515) is provided around the cover plate (513), a first hole (516) is provided at the bottom of the cover plate (513), the bottom main body mold (1) and the upper main body mold (7), a movable slit is provided on the cover plate (513), a telescopic cover (514) is provided around the bottom of the cover plate (513), the telescopic cover (514) is arranged on one side of the card slot (515) provided at the bottom of the cover plate (513), and protrusions (518) are fixedly connected around the bottom of the bottom inner template (11).

2. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 1, characterized in that: The bottom of the card slot (515) is arranged to be open, and the interior of the card slot (515) is plugged into the surface of the buckle (512).

3. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 1, characterized in that: There are two cover plates (513), and the two cover plates (513) are threadedly connected via bolts (2).

4. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 1, characterized in that: The water inlet control component (52) comprises a heating tube (521) and a ball valve (522); the heating tube (521) is fixedly connected to one side of the inner wall of the bottom main body mold (1); a hole is provided on the ball valve (522); one side of the ball valve (522) is fixedly connected to a water control rod (523); and the bottom of the water control rod (523) is fixedly connected to a water control valve (524).

5. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 1, characterized in that: The pumping mechanism (3) comprises a base (34), the base (34) being threadedly connected to the lower end of one side of the bottom main body mold (1) via a bolt (2), a roller (35) being arranged on one side of the top of the base (34), a belt (304) being transmission-connected to the surface of the roller (35), one side of the roller (35) being fixedly connected to a second transmission rod (36), the other side of the second transmission rod (36) being fixedly connected to a transmission crank (37), one side of the transmission crank (37) being threadedly connected to a first rotating bolt (38), the other side of the first rotating bolt (38) being connected to a third transmission rod (39), the other side of the third transmission rod (39) being connected to the first rotating bolt (38). The bolt (38) is threadedly connected to a piston (33); the bottom main body mold (1) is threadedly connected to a water diversion pipe (302) via the bolt (2); the bottom main body mold (1) is threadedly connected to a water diversion valve (301) via the bolt (2); the inner ring of the piston (33) is threadedly connected to a piston cover (303); a sealing ring (32) is clamped between the piston (33) and the piston cover (303); the bottom main body mold (1) is threadedly connected to a water stop valve (31) via the bolt (2); and the water diversion pipe (302) is arranged on the surface of the water diversion valve (301), the piston cover (303), the sealing ring (32) and the piston (33).

6. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 5, characterized in that: The number of water diversion valves (301) connected to the piston (33) via bolts (2) is two, the inner side of the piston (33) is provided with threads, and the piston cover (303) is provided with holes.

7. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 5, characterized in that: The number of the bottom body molds (1) is two, and the two bottom body molds (1) are threadedly connected by bolts (2). The bolts (2) have upper and lower layers. The bottom of the bottom body mold (1) is provided with a slide groove (67), and the bottom of the bottom body mold (1) is provided with an air (water) outlet (4).

8. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 1, characterized in that: The template opening mechanism (6) includes a base (69) and a roller (68), wherein the base (69) is arranged on the top of the upper main body mold (7), and a slide rail (64) is provided at the bottom of the base (69). The roller (68) is clamped on the bottom main body mold (1) through the slide rail (64), and a slider (63) is slidably connected inside the slide rail (64). A semi-ring rotating device (66) is provided at the bottom of the base (69), and a connecting rod 1 (62) is provided at the bottom of the semi-ring rotating device (66). A second rotating bolt (61) is threadedly connected inside the connecting rod 1 (62) and the slider (63), and the bottom of the slider (63) and the top of the connecting rod (517) are fixedly connected.

9. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 8, characterized in that: The number of the bases (69) is two, the bases (69) are threadedly connected via bolts (2), and the bases (69) are provided with air (water) inlets (8), and the number of the air (water) inlets (8) is four.

10. The self-draining formwork and maintenance device for UHPC reinforced rectangular bridge piers according to claim 8, characterized in that: The number of the semi-ring rotating devices (66) is two, and the semi-ring rotating devices (66) are threadedly connected via bolts (2). The semi-ring rotating devices (66) are used in conjunction with a base (69) and are placed on the base (69) for rotation. The number of the connecting rods (62) is four, and the connecting rods (62) are provided with two second holes (65). The number of the sliding blocks (63) is four, and the sliding blocks (63) are provided with two second holes (65).

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