Concrete vibrating channel device for inclined bridge tower of cable-stayed bridge

Abstract

The utility model belongs to the field of cable-stayed bridge tower structure construction, and particularly relates to a concrete vibration channel device for a cable-stayed bridge inclined bridge tower. Comprising a stiff framework, the stiff framework is erected on a poured inclined bridge tower, and a cable-stayed bridge formwork arranged on the poured inclined bridge tower is arranged on the outer side of the stiff framework; the multiple sets of limiting plates are arranged from top to bottom, and the limiting plates are connected with the stiff framework; and a vibrating rod is arranged in the vibrating channel, the vibrating channel is connected with the limiting plate, the upper end of the vibrating channel extends out of the cable-stayed bridge formwork, and the lower end of the vibrating channel extends to a vibrating blind area at the bottom in the cable-stayed bridge formwork. According to the utility model, a worker can complete the vibration of a vibration blind area on the top operation platform, so that the concrete vibration quality is improved, and the construction safety risk is reduced.

Description

Technical Field

[0001] The utility model patent belongs to the field of cable-stayed bridge tower structure construction, specifically a concrete vibration channel device for inclined towers of cable-stayed bridges. Background Art

[0002] Most cable-stayed bridge towers are designed with an inclined tower structure. The tower column adopts an inclined structure with an acute angle to the horizontal plane. The tower column formwork counter-presses the concrete. Concrete bubbles are introduced during the construction process. In order to make the concrete continuously dense, vibration must be strengthened. Construction vibration is to speed up the discharge of bubbles, but the bubbles are affected by the formwork resistance and the concrete's own viscous resistance during the discharge process. In particular, when the bubbles are blocked by the inclined formwork during the rising process, the increased resistance prevents the bubbles from being discharged smoothly and sticks to the formwork surface, forming bubbles after hardening.

[0003] The effective range of the concrete vibrator is 30 to 40 cm. The horizontal projection length of the inclined formwork of the inclined bridge tower increases with the increase of the structure height. If the workers stand at the top to vibrate, the vibration effect will be greatly weakened. If the operator only stands in the vertical range to vibrate, there will be a large vibration blind area in the entire structure. At this time, the concrete in the vibration blind area is in a natural accumulation state without vibration. Most of the bubbles on the surface are air bubbles introduced during the pouring of concrete. These bubbles are large. The generation of bubbles is related to the height of the component or the pouring thickness. If the pouring thickness is too large at one time, the vibration effect is poor and the bubbles are more difficult to discharge. Summary of the invention

[0004] In order to solve the problem that bubbles cannot be discharged during concrete vibration of inclined bridge towers, the utility model provides a concrete vibration channel device for inclined bridge towers of cable-stayed bridges.

[0005] The utility model adopts the following technical scheme: a device for vibrating a concrete channel of an inclined tower of a cable-stayed bridge, comprising:

[0006] A rigid frame, wherein the rigid frame is erected on the cast inclined bridge tower, and the outer side of the rigid frame is a cable-stayed bridge template arranged on the cast inclined bridge tower;

[0007] Limiting plates, wherein the limiting plates are arranged in multiple groups from top to bottom, and the limiting plates are connected to the rigid frame;

[0008] A vibration channel is provided with a vibrating rod, the vibration channel is connected to a limit plate, the upper end of the vibration channel extends out of the cable-stayed bridge template, and the lower end of the vibration channel extends to a vibration blind area at the bottom of the cable-stayed bridge template.

[0009] In some embodiments, the limiting plate includes a limiting left plate and a limiting right plate, and a semicircular groove is provided on the contact side of the limiting left plate and the limiting right plate respectively, and the two grooves form a circle for allowing the vibration channel to pass through.

[0010] In some embodiments, a rotating shaft is provided on one side where the left limiting plate and the right limiting plate are connected to the rigid frame, and the left limiting plate and the right limiting plate are hingedly connected to the rigid frame through the rotating shaft.

[0011] In some embodiments, the vibration channel includes a plurality of pipes, and each pipe is connected by a threaded sleeve.

[0012] In some embodiments, a spring is provided between the bottom of the limiting plate and the rigid frame.

[0013] In some embodiments, the outer diameter of the threaded sleeve is greater than the diameter of the circle enclosed by the grooves of the left limiting plate and the right limiting plate.

[0014] In some embodiments, the vibration channel is a steel pipe with a diameter of 8 cm, and a single steel pipe is 50 cm long.

[0015] In some embodiments, an inner box operating platform is provided on the top of the cable-stayed bridge formwork, which serves as a vibration operating platform for workers.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model patent arranges a concrete auxiliary vibration channel inside the tower column in advance during the cable tower concrete construction. As the concrete is poured layer by layer, the auxiliary vibration channel is lifted section by section until the tooling is pulled out when the concrete is poured to the top.

[0018] Compared with the construction workers who need to enter the interior of the bridge tower to carry out concrete vibration construction, due to the large number of steel bars designed inside the bridge tower, the limited space may make it difficult for construction workers to accurately control the range and strength of the vibration, resulting in an uneven concrete surface, affecting the aesthetics and structural performance. In a narrow space full of steel bars, construction workers need to be more cautious to avoid being stabbed or collided with by steel bars. At the same time, there may be risks such as electric shock and mechanical injury when operating the vibration equipment. The utility model enables personnel to complete the vibration of the blind area of ​​the vibration on the top operating platform, which not only improves the quality of concrete vibration but also reduces construction safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the installation diagram of the rigid frame of the inclined bridge tower;

[0020] Figure 2 This is the installation diagram of the inclined bridge tower formwork;

[0021] Figure 3 This is the installation diagram of the vibration channel of the inclined bridge tower;

[0022] Figure 4 This is the principle diagram of the vibration channel of the inclined bridge tower;

[0023] Figure 5 Fixed elevations for the vibrating channels of the inclined pylons;

[0024] Figure 6 Fixing plan for vibrating access to inclined pylons;

[0025] In the figure, 1- poured height, 2- rigid frame, 3- climbing formwork load-bearing frame, 4- outer formwork, 5- inner formwork, 6- inner box operating platform, 7- threaded connection, 8- vibration channel, 9- limiting steel plate, 10- spring, 11- vibrating rod, 12- rotating shaft. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] like Figure 1 , Figure 2 As shown, a rigid frame 2 is set up on the cast inclined bridge tower 1. The rigid frame 2 is made of L100*100*6 angle steel. After installation, the steel bars and formwork can be installed. The outer formwork 4 of the bridge tower is supported by a climbing formwork load-bearing frame 3. The outer formwork 4 and the inner formwork 5 are fixed by a tie rod. An inner box operating platform 6 is set up on the top of the inner formwork to provide a vibrating operating platform for operators.

[0028] A concrete vibrating channel device for inclined towers of cable-stayed bridges, comprising:

[0029] A rigid frame 2, wherein the rigid frame 2 is set on the cast inclined bridge tower, and the outer side of the rigid frame 2 is a cable-stayed bridge template arranged on the cast inclined bridge tower;

[0030] Limiting plates 9, wherein the limiting plates 9 are arranged in multiple groups from top to bottom, and the limiting plates 9 are connected to the rigid frame 2;

[0031] A vibration channel 8 is provided with a vibrating rod 11, the vibration channel 8 is connected to a limit plate 9, the upper end of the vibration channel 8 extends out of the cable-stayed bridge formwork, and the lower end of the vibration channel 8 extends to the vibration blind area at the bottom of the cable-stayed bridge formwork.

[0032] The limiting plate 9 includes a left limiting plate and a right limiting plate. A semicircular groove is provided on the contact side of the left limiting plate and the right limiting plate respectively. The two grooves form a circle for allowing the vibration channel 8 to pass through.

[0033] A rotating shaft 12 is provided on one side where the left limiting plate and the right limiting plate are connected to the rigid frame 2 , and the left limiting plate and the right limiting plate are hingedly connected to the rigid frame 2 via the rotating shaft 12 .

[0034] A spring 10 is provided between the bottom of the limiting plate 9 and the rigid frame 2 .

[0035] like Figure 3 , Figure 5 , Figure 6 As shown, the vibration channel 8 device is made of 8cm diameter steel pipe, and the length of a single pipe is 50cm. In order to facilitate the removal of the pipe by the operator after lifting, the pipe mouth is connected by a threaded connection 7. The vibration channel 8 is fixed through the rigid frame 2 and extends into the vibration blind area on the lower side of the inclined template. The vibration channel 8 and the rigid frame 2 are rigidly fixed by a rotatable limit plate, and the limit plate 9 and the rigid frame 7 are connected by a rotating shaft 12. When the vibration channel 8 is lifted, the limit plate 9 passes through the threaded connection 7, and the limit plate 9 is bounced off by the joint position. When it is lifted to the pipe position, the spring 10 will retract the limit plate, and the vibration channel 8 will fall down at this time, so that the threaded connection 7 position is located on the limit, thereby completing the fixed limit.

[0036] like Figure 4 As shown, during construction, when the concrete pouring makes the vibration channel 8 buried to a depth of 50 cm, the tooling is manually lifted, and a section is removed through the thread, and the channel pipe is vibrated and removed section by section until the pouring is completed.

[0037] When the vibrating rod 11 reaches the concrete pouring surface through the channel, the depth of the vibrating rod 11 inserted into the lower concrete is controlled to be more than 50mm to ensure that the joints between the two layers of concrete are eliminated. The vibration time at each point is generally 20 to 30 seconds, and the concrete surface no longer sinks significantly, no bubbles appear, and mortar appears on the surface. During the vibration process, the "fast insertion and slow withdrawal" method is adopted, that is, the vibrating rod is quickly inserted into the concrete, and slightly pulled up and down during vibration to make the vibration uniform. After completing the vibration, slowly pull out the vibrating rod.

[0038] The vibration channel 8 ensures that during the vibration process, the vibration rod 11 is prevented from colliding with the formwork, tie rods, steel bars and embedded parts, so as to avoid damage to the concrete structure.

[0039] The utility model utilizes the rigid frame in the tower as an auxiliary measure for reinforcing the vibration channel, fixes the vibration channel in the rigid frame in the tower, arranges one vibration channel every 40 cm in the inclined surface cross section, and each vibration channel is 30 cm away from the template.

[0040] Construction Operation

[0041] After the rigid frame, steel bars and formwork of the bridge tower are installed, check the construction preparation:

[0042] According to the design requirements of the auxiliary vibration channel, the formwork is fixed to the bridge tower structure using supports and fixtures to prevent displacement during concrete pouring. Before pouring, the formwork and steel skeleton are inspected to ensure that they are free of debris and damage.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A device for vibrating a concrete channel of an inclined tower of a cable-stayed bridge, characterized in that: include: A rigid frame (2), wherein the rigid frame (2) is erected on the cast inclined bridge tower, and the outer side of the rigid frame (2) is a cable-stayed bridge formwork arranged on the cast inclined bridge tower; Limiting plates (9), wherein a plurality of limiting plates (9) are arranged from top to bottom, and the limiting plates (9) are connected to the rigid frame (2); A vibration channel (8), wherein a vibration rod (11) is arranged in the vibration channel (8), the vibration channel (8) is connected to the limit plate (9), the upper end of the vibration channel (8) extends out of the cable-stayed bridge template, and the lower end of the vibration channel (8) extends to the vibration blind area at the bottom of the cable-stayed bridge template.

2. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 1 is characterized in that: The limiting plate (9) comprises a limiting left plate and a limiting right plate, and a semicircular groove is provided on each contact side of the limiting left plate and the limiting right plate, and the two grooves form a circle for allowing the vibration channel (8) to pass through.

3. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 2 is characterized in that: A rotating shaft (12) is provided on one side where the left limiting plate and the right limiting plate are connected to the rigid frame (2), and the left limiting plate and the right limiting plate are respectively hingedly connected to the rigid frame (2) via the rotating shaft (12).

4. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 3 is characterized in that: The vibration channel (8) comprises a plurality of pipes, and each of the pipes is connected via a threaded sleeve (7).

5. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 4 is characterized in that: A spring (10) is provided between the bottom of the limiting plate (9) and the rigid frame (2).

6. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 5, characterized in that: The outer diameter of the threaded sleeve (7) is greater than the diameter of the circle enclosed by the grooves of the left limiting plate and the right limiting plate.

7. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 4 is characterized in that: The vibration channel (8) is a steel pipe with a diameter of 8 cm, and the length of a single steel pipe is 50 cm.

8. The device for vibrating concrete channel of inclined tower of cable-stayed bridge according to claim 1, characterized in that: An inner box operating platform (6) is provided on the top of the cable-stayed bridge template and is a vibrating operating platform for operators.

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