Construction formwork and construction method for optimizing the appearance of pier and tower

Abstract

The present invention provides a construction formwork and a construction method for optimizing the appearance of piers and towers, including an outer formwork. A plurality of compensation vibration devices are arranged inside the outer formwork. A retractable expansion disc is arranged on the compensation vibration device. A vertical edge is arranged on the outer formwork. The side wall of the expansion disc is slidably and sealingly connected to the inner wall of the vertical edge. The extreme strokes of the expansion disc are respectively located outside and inside the outer formwork. At a certain stroke position, the outer surface of the expansion disc is flush with the outer wall of the outer formwork. The expansion disc is connected to a piston rod. The piston rod is located inside a cylinder body. The cylinder body is fixedly connected to the inner wall of the outer formwork. A stroke sensor for detecting the position of the expansion disc is also provided. By adopting the expansion and contraction of the structure of the compensation vibration device, the kneading operation of the concrete is realized to eliminate air bubbles, thereby avoiding the defect of honeycombing and pockmarking on the appearance of the concrete. The present invention also overcomes the problem of insufficient vibration existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of pier construction of bridges, and particularly to a construction formwork and a construction method for optimizing the appearance of piers and towers. Background Art

[0002] In the existing pier construction projects of bridges, it is usually required to deliver fair-faced concrete, and the concrete surface cannot be repaired, which puts higher requirements on the quality of pouring construction. Currently, this technical problem can only be solved by strengthening vibration. Usually, only a later remedial scheme can be adopted. For example, in Chinese patent documents, a method for treating pitted concrete walls CN110256004A; a method for treating leakage of honeycombed and pitted concrete CN113756604A. Currently, no better preventive scheme has been seen. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a construction formwork and a construction method for optimizing the appearance of piers and towers, which can improve the construction quality of tunnel lining, make the poured concrete more dense, make the surface of the concrete free of honeycombing and pitting, and can also make the vibration of the concrete more sufficient.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is: a construction formwork for optimizing the appearance of piers and towers, including an outer formwork. A plurality of compensation vibration devices are arranged inside the outer formwork. A telescopic disc is arranged on the compensation vibration device. A vertical edge is arranged on the outer formwork. The side wall of the telescopic disc is slidably and sealingly connected with the inner wall of the vertical edge;

[0005] The limit strokes of the telescopic disc are respectively located outside and inside the outer formwork. At a certain stroke position, the outer surface of the telescopic disc is flush with the outer wall of the outer formwork;

[0006] The telescopic disc is connected with a piston rod. The piston rod is located inside the cylinder body. The cylinder body is fixedly connected with the inner wall of the outer formwork;

[0007] A stroke sensor for detecting the position of the telescopic disc is also provided.

[0008] In a preferred scheme, the stroke sensor is a magnetostrictive displacement sensor.

[0009] In a preferred scheme, an excitation device is arranged inside the piston rod;

[0010] The excitation device includes a hydraulic, pneumatic or electric excitation device. The pipeline of the excitation device is led out through the detection rod of the magnetostrictive displacement sensor.

[0011] In a preferred scheme, a through pipe is further arranged on the piston rod. The through pipe passes through the cylinder body, the piston rod and the telescopic disc. The outer wall of the through pipe is slidably and sealingly connected with the cylinder body. The through pipe is used for the soft shaft vibration device to pass through.

[0012] In a preferred embodiment, an excitation device is provided inside the through-tube. The excitation device is hermetically connected to the through-tube. An optoelectronic stroke sensor is provided on the cylinder block on one side of the through-tube, and the optoelectronic stroke sensor is used to detect the stroke of the through-tube.

[0013] In a preferred embodiment, the structure of the excitation device is as follows: The through-tube is connected to a connection seat. The inner wall of the connection seat is connected to a sealing end cover through a sliding pull rod. The sealing end cover is connected to the through-tube, and the outer wall of the sealing end cover is flush with the outer wall of the outer mold.

[0014] The connection seat is also fixedly connected to a rotary drive device. The output shaft of the rotary drive device is connected to a cam. The excitation block is slidably connected to the sliding pull rod. The excitation block is provided with a concave-convex end face, and the concave-convex end face of the excitation block contacts the concave-convex end face of the cam to drive the excitation block to reciprocate.

[0015] A return spring is further provided at one end of the excitation block away from the cam, and the return spring is arranged in the spring groove of the excitation block.

[0016] In a preferred embodiment, the structure of the excitation device is as follows: The through-tube is connected to a connection seat. The inner wall of the connection seat is connected to a sealing end cover through a sliding pull rod. The sealing end cover is hermetically connected to the through-tube, and the outer wall of the sealing end cover is flush with the outer wall of the top mold or the side mold.

[0017] The connection seat is also connected to a pneumatic motor. The output shaft of the pneumatic motor is connected to a gas distribution valve plate and drives the gas distribution valve plate to rotate.

[0018] Ventilation waist holes are provided on the gas distribution valve plate. A gas distribution groove communicating with the ventilation waist holes is provided on one end face of the gas distribution valve plate. The exhaust hole of the pneumatic motor is communicated with the gas distribution groove.

[0019] The excitation block is slidably connected to the sliding pull rod. One end face of the excitation block forms a seal with the gas distribution valve plate. A return spring is provided at the other end of the excitation block, and the return spring is arranged in the spring groove of the excitation block.

[0020] An exhaust passage is provided between the pneumatic motor and the inner wall of the through-tube.

[0021] In a preferred embodiment, an air storage cavity is further provided on the excitation block. An air storage hole is provided on the air storage cavity, and the air storage hole is communicated with the ventilation waist holes at a certain angle in the circumferential direction.

[0022] In a preferred embodiment, the connection seat adopts a sleeve structure. The inner wall of the connection seat is provided with internal threads, and the outer wall of the through-tube is provided with external threads. The connection seat is threadedly connected to the through-tube.

[0023] A construction method using the construction formwork for optimizing the appearance of the pier tower as described above includes the following steps:

[0024] S1. After the climbing frame climbs to the in-place position, control the outer mold support to close the mold, fixedly install the outer mold and the inner mold, and install tie rods between the outer mold and the inner mold.

[0025] S2. Place the steel reinforcement cage between the outer formwork and the inner formwork, and pour concrete in layers. During the pouring process, insert the vibrator through the core pipe of the compensation vibrator at different heights into the flexible shaft vibrator for vibration;

[0026] Install the vibration excitation device after vibration;

[0027] S3. Control the staggered expansion and contraction of the piston rods of each compensation vibrator. When retracting, the expansion disk of the compensation vibrator retracts inside the surface of the outer formwork. When extending, the expansion disk extends outside the surface of the outer formwork. Finally, through the detection of the displacement sensor, make the expansion disk flush with the surface of the outer formwork;

[0028] S4. Start the vibration excitation device of the compensation vibrator and maintain it for a period of time;

[0029] Make the appearance of the pier tower concrete beautiful through the above steps.

[0030] A construction formwork and construction method for optimizing the appearance of a pier tower provided by the present invention realize the kneading operation of concrete by adopting the expansion and contraction of the structure of the compensation vibrator to eliminate air bubbles, thereby avoiding the honeycombing and pockmark defects on the concrete appearance. The present invention also overcomes the problem of insufficient vibration existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the drawings and embodiments:

[0032] Figure 1 It is a top view of the pier tower formwork of the present invention.

[0033] Figure 2 It is a front view of the pier tower formwork of the present invention.

[0034] Figure 3 It is a schematic structural diagram of the construction of the present invention.

[0035] Figure 4 It is a schematic structural diagram of the compensation vibrator of the present invention.

[0036] Figure 5 It is a schematic structural diagram of the compensation vibrator of the present invention with a vibration channel.

[0037] Figure 6 It is a schematic vibration excitation structure diagram of the compensation vibrator of the present invention.

[0038] Figure 7 It is another preferred vibration excitation structure diagram of the compensation vibrator of the present invention.

[0039] Figure 8 It is a front structural schematic diagram of the air distribution valve plate of the present invention.

[0040] Figure 9 Schematic diagram of the reverse side structure of the air distribution valve plate of the present invention.

[0041] Figure 10 Schematic three-dimensional structure diagram of the excitation block of the present invention.

[0042] In the figure: outer mold 1, outer mold support 2, pier concrete 3, climbing frame 4, compensation vibration device 5, telescopic disc 51, piston rod 52, piston 53, cylinder block 54, rotary excitation device 55, connecting seat 551, rotary drive device 552, cam 553, excitation block 554, spring groove 555, return spring 556, sealed end cover 557, sliding pull rod 558, pneumatic excitation device 56, air storage cavity 561, air distribution valve plate 562, pneumatic motor 563, ventilation waist hole 564, air distribution groove 565, air storage hole 566, rotary limit groove 567, through pipe 57, flexible shaft vibration device 6, air bubble 7, vertical edge 8, magnetostrictive displacement sensor 9, photoelectric travel sensor 10, excitation device 11. Specific embodiments

[0043] Embodiment 1:

[0044] As shown in Figures 1 to 4 , a construction formwork for optimizing the appearance of a pier and tower includes an outer mold 1. A plurality of compensation vibration devices 5 are provided inside the outer mold 1. A telescopic telescopic disc 51 is provided on the compensation vibration device 5. A vertical edge 8 is provided on the outer mold 1. The side wall of the telescopic disc 51 is slidably and sealingly connected to the inner wall of the vertical edge 8;

[0045] The extreme strokes of the telescopic disc 51 are respectively located outside and inside the outer mold 1. At a certain stroke position, the outer surface of the telescopic disc 51 is flush with the outer wall of the outer mold 1;

[0046] The telescopic disc 51 is connected to the piston rod 52. The piston rod 52 is located inside the cylinder block 54. The cylinder block 54 is fixedly connected to the inner wall of the outer mold 1;

[0047] A travel sensor for detecting the position of the telescopic disc 51 is also provided. A preferred solution is as shown in Figure 4 , the travel sensor is a magnetostrictive displacement sensor 9. The specific principle of eliminating air bubbles in concrete is that when the concrete is under the rubbing action and moves downward, the air bubbles usually stay in place, while when the concrete moves upward, the air bubbles will move upward with the concrete, thereby accelerating the discharge of the air bubbles on the concrete surface. Overcoming the honeycombed and pitted surface defects on the concrete surface.

[0048] A preferred solution is as shown in Figure 4 , an excitation device 11 is provided inside the piston rod 52;

[0049] The described vibration excitation device 11 includes a hydraulic, pneumatic or electric vibration excitation device. The pipeline of the vibration excitation device 11 is led out through the detection rod of the magnetostrictive displacement sensor 9. After the kneading and defoaming operation, the vibration excitation device 11 is started and maintained for a period of time, such as 3 to 5 minutes, to make the surface of the concrete smooth, meeting the delivery standard of fair-faced concrete. The provided stroke sensor can accurately control the outer surface of the telescopic disc 51 to be flush with the outer wall of the outer mold 1.

[0050] The preferred solution is as Figure 5 In [the preferred solution], a through pipe 57 is further provided on the piston rod 52. The through pipe 57 passes through the cylinder block 54, the piston rod 52 and the telescopic disc 51. The outer wall of the through pipe 57 is slidably and sealingly connected to the cylinder block 54. The through pipe 57 is used for the flexible shaft vibrating device 6 to pass through. With this structure, the flexible shaft vibrating device 6 can be inserted into the concrete of the current layer nearby, improving the vibrating effect. Compared with the prior art where the flexible shaft vibrating device 6 is placed from the top, it is easier to control the vibrating effect when placing it from the side of the outer mold 1.

[0051] The preferred solution is as Figure 6 , 7 In [the preferred solution], a vibration excitation device is provided inside the through pipe 57. The vibration excitation device is sealingly connected to the through pipe 57. An optoelectronic stroke sensor 10 is provided on the cylinder block 54 on one side of the through pipe 57. The optoelectronic stroke sensor 10 is used to detect the stroke of the through pipe 57. When adopting the structure of the optoelectronic stroke sensor 10, one extreme position of the piston rod 52 is used as the zero position, and the stroke of the through pipe 57 is obtained in an extended range manner, so as to obtain the accurate stroke of the telescopic disc 51, and then accurately control the telescopic disc 51 to be able to be located inside the outer mold, outside the outer mold and flush with the outer surface of the outer mold.

[0052] The preferred solution is as Figure 6 In [the preferred solution], the structure of the vibration excitation device is: the through pipe 57 is connected to the connecting seat 551. The inner wall of the connecting seat 551 is connected to the sealing end cover 557 through a sliding pull rod 558. The sealing end cover 557 is connected to the through pipe 57, and the outer wall of the sealing end cover 557 is flush with the outer wall of the outer mold 1; a sealing ring is provided on the side wall of the sealing end cover 557 to form a seal with the inner wall of the through pipe 57. After the through pipe 57 is reliably connected to the connecting seat 551, the outer wall of the sealing end cover 557 is exactly flush with the outer wall of the outer mold 1. After removing the vibration excitation device, the through pipe 57 is the channel for the flexible shaft vibrating device 6.

[0053] The connecting seat 551 is also fixedly connected to the rotary drive device 552. The output shaft of the rotary drive device 552 is connected to the cam 553. The vibration excitation block 554 is slidably connected to the sliding pull rod 558. The vibration excitation block 554 is provided with a concave-convex end face, and the concave-convex end face of the vibration excitation block 554 contacts the concave-convex end face of the cam 553 to drive the vibration excitation block 554 to reciprocate; the rotary drive device 552 in this example is preferably a hydraulic motor, a pneumatic motor or an electric motor.

[0054] One end of the excitation block 554 away from the cam 553 is also provided with a return spring 556, and the return spring 556 is arranged in the spring groove 555 of the excitation block 554. With this structure, it is used to push the excitation block 554 back to its original position, and it will not affect the excitation block 554 from transmitting vibration to the sealing end cover 557, and is transmitted by the sealing end cover 557 to the sliding pull rod 558, the connecting seat 551, the through pipe 57 and the expansion disc 51, so as to achieve the effect of an attached vibrator. The advantage of this example is that the excitation frequency is adjustable, so that it can adapt to different excitation frequencies according to the characteristics of the concrete.

[0055] The preferred solution is as Figures 7 to 10 shown in, the structure of the excitation device is: the through pipe 57 is connected to the connecting seat 551, the inner wall of the connecting seat 551 is connected to the sealing end cover 557 through the sliding pull rod 558, the sealing end cover 557 is hermetically connected to the through pipe 57, and the outer wall of the sealing end cover 557 is flush with the outer wall of the top form or the side form;

[0056] The connecting seat 551 is also connected to the pneumatic motor 563, the output shaft of the pneumatic motor 563 is connected to the air distribution valve plate 562, and drives the air distribution valve plate 562 to rotate;

[0057] An air vent waist hole 564 is provided on the air distribution valve plate 562, an air distribution groove 565 communicating with the air vent waist hole 564 is provided on one end face of the air distribution valve plate 562, and the exhaust hole of the pneumatic motor 563 is communicated with the air distribution groove 565;

[0058] The excitation block 554 is slidably connected to the sliding pull rod 558, one end face of the excitation block 554 forms a seal with the air distribution valve plate 562, and a return spring 556 is provided at the other end of the excitation block 554, and the return spring 556 is arranged in the spring groove 555 of the excitation block 554;

[0059] An exhaust passage is provided between the pneumatic motor 563 and the inner wall of the through pipe 57. With this structure, the exhaust of the pneumatic motor 563 is used to drive the reciprocating vibration of the excitation block 554. The advantages are simple structure, high durability, large excitation force and good excitation effect.

[0060] The preferred solution is as Figure 7 、 10In it, an air storage cavity 561 is further provided on the excitation block 554. An air storage hole 566 is provided on the air storage cavity 561. The air storage hole 566 is communicated with the ventilation waist hole 564 at a certain angle on the circumference. The structure of the provided air storage cavity 561 can improve the excitation force of the excitation block 554. When the ventilation waist hole 564 is communicated with the air storage hole 566 on the circumference, gas enters the air storage cavity 561 and is compressed to obtain pressure to initially counteract the force of the return spring 556. When the ventilation waist hole 564 is blocked from the air storage hole 566, compressed air is generated in the ventilation waist hole 564 to impact the excitation block 554 towards the sealing end cover 557. The excitation force is transmitted to the concrete by the sealing end cover 557, the sliding pull rod 558, the connecting seat 551, the through pipe 57, and the telescopic disc 51. At this time, since the excitation block 554 leaves the air distribution valve plate 562, the compressed gas is discharged from the gap between the air distribution valve plate 562 and the excitation block 554. The return spring 556 acts to reset the excitation block 554, completing one impact stroke and starting the next cycle, thus realizing continuous excitation.

[0061] In a preferred solution, the connecting seat 551 adopts a sleeve structure. The inner wall of the connecting seat 551 is provided with an internal thread, and the outer wall of the through pipe 57 is provided with an external thread. The connecting seat 551 is threadedly connected to the through pipe 57.

[0062] Embodiment 2:

[0063] As Figures 1 to 3 In it, a construction method using the construction formwork for optimizing the appearance of the pier tower as described above includes the following steps:

[0064] S1. After the climbing frame 4 climbs in place, control the outer formwork support 2 to close the formwork, fixedly install the outer form 1 and the inner form, and install tie rods between the outer form 1 and the inner form;

[0065] S2. Lower the steel reinforcement cage between the outer form 1 and the inner form, and pour concrete in layers. During the pouring process, insert the through pipe 57 of the compensation vibrating device 5 at different heights into the flexible shaft vibrating device 6 for vibration;

[0066] Install the excitation device after the vibration is completed;

[0067] S3. Control the piston rods 52 of each compensation vibrating device 5 to alternately expand and contract. When retracting, the telescopic disc 51 of the compensation vibrating device 5 retracts inside the outer form surface. When extending, the telescopic disc 51 extends outside the outer form surface. Preferably, the compensation vibrating devices below are set as one group, and the compensation vibrating devices above are set as another group, and they alternately expand and contract. After several times, finally, the telescopic disc 51 is flush with the outer form surface through the detection of the displacement sensor;

[0068] S4. Start the excitation device 11 of the compensation vibrating device 5 and maintain it for a period of time;

[0069] The appearance of the pier tower concrete is made beautiful through the above steps.

[0070] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments in this application and the features in the embodiments can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recited in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A construction formwork for optimizing the appearance of piers and towers, including an outer form (1), characterized in that: A plurality of compensation vibration devices (5) are provided inside the outer mold (1). A retractable expansion disc (51) is provided on the compensation vibration device (5). A vertical edge (8) is provided on the outer mold (1). The side wall of the expansion disc (51) is slidably and sealingly connected to the inner wall of the vertical edge (8); The limit strokes of the expansion disc (51) are respectively located outside and inside the outer mold (1). At a certain stroke position, the outer surface of the expansion disc (51) is flush with the outer wall of the outer mold (1); The expansion disc (51) is connected to a piston rod (52). The piston rod (52) is located inside a cylinder block (54). The cylinder block (54) is fixedly connected to the inner wall of the outer mold (1); A stroke sensor for detecting the position of the expansion disc (51) is also provided; The stroke sensor is a magnetostrictive displacement sensor (9); An excitation device (11) is provided inside the piston rod (52); The excitation device (11) includes an electric excitation device. The pipeline of the excitation device (11) is led out through the detection rod of the magnetostrictive displacement sensor (9); A through pipe (57) is also provided on the piston rod (52). The through pipe (57) passes through the cylinder block (54), the piston rod (52) and the expansion disc (51). The outer wall of the through pipe (57) is slidably and sealingly connected to the cylinder block (54). The through pipe (57) is used for the soft shaft vibration device (6) to pass through; An excitation device is provided inside the through pipe (57). The excitation device is sealingly connected to the through pipe (57). An optoelectronic stroke sensor (10) is provided on the cylinder block (54) on one side of the through pipe (57). The optoelectronic stroke sensor (10) is used for detecting the stroke of the through pipe (57); The structure of the excitation device is: the through pipe (57) is connected to a connection seat (551). The inner wall of the connection seat (551) is connected to a sealing end cover (557) through a sliding pull rod (558). The sealing end cover (557) is connected to the through pipe (57), and the outer wall of the sealing end cover (557) is flush with the outer wall of the outer mold (1); The connection seat (551) is also fixedly connected to a rotary drive device (552). The output shaft of the rotary drive device (552) is connected to a cam (553). The excitation block (554) is slidably connected to the sliding pull rod (558). The excitation block (554) is provided with a concave-convex end face. The concave-convex end face of the excitation block (554) contacts the concave-convex end face of the cam (553) to drive the excitation block (554) to reciprocate; A return spring (556) is also provided at one end of the excitation block (554) away from the cam (553). The return spring (556) is arranged in the spring groove (555) of the excitation block (554).

2. The construction formwork for optimizing the appearance of pier towers according to claim 1, characterized in that: The connection seat (551) adopts a sleeve structure. The inner wall of the connection seat (551) is provided with an internal thread. The outer wall of the through pipe (57) is provided with an external thread. The connection seat (551) is threadedly connected to the through pipe (57).

3. A construction method using the construction formwork for optimizing the appearance of the pier and tower described in any one of claims 1 to 2, characterized in that It includes the following steps: S1. After the climbing frame (4) climbs in place, control the outer mold support (2) to close the mold, fixedly install the outer mold (1) and the inner mold, and install tie rods between the outer mold (1) and the inner mold; S2. Lower the steel reinforcement cage between the outer formwork (1) and the inner formwork, and pour concrete in layers. During the pouring process, insert the core pipes (57) of the compensation vibration devices (5) at different heights into the flexible shaft vibration device (6) for vibration; Install the vibration excitation device after vibration is completed; S3. Control the staggered expansion and contraction of the piston rods (52) of each compensation vibration device (5). When retracting, the expansion and contraction discs (51) of the compensation vibration device (5) retract inside the surface of the outer formwork. When extending, the expansion and contraction discs (51) extend outside the surface of the outer formwork. Finally, through the detection of the displacement sensor, make the expansion and contraction discs (51) flush with the surface of the outer formwork; S4. Start the vibration excitation device (11) of the compensation vibration device (5) and maintain it for a period of time; The appearance of the pier concrete is made beautiful through the above steps.

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