A pile-column integrated assembled bridge cap beam elevation control device and control method

Abstract

The present invention provides a pile-column integrated assembled bridge cap beam elevation control device and control method, wherein the control device includes two pressure-bearing templates, ear plates, handling plates, extended steel bars and steel bar connecting sleeves, each pressure-bearing template has hanging ears at both ends, and the two ends of each pressure-bearing template are fixedly connected to form a hoop by bolting the hanging ears, which is fixed to the top of the prefabricated pipe pile, and the reserved steel bars at the top of the prefabricated pipe pile are located inside the hoop formed by the pressure-bearing template; the outer side of each pressure-bearing template is provided with a handling plate, and the handling plate is located between the hanging ears at both ends of the pressure-bearing template; the steel bar connecting sleeve is located in the hoop formed by the pressure-bearing template, one end of the extended steel bar is connected to the reserved steel bar through the steel bar connecting sleeve, and the other end of the extended steel bar extends out of the hoop formed by the pressure-bearing template, and is used to plug the reserved steel bar hole at the bottom of the prefabricated cap beam. The present invention can realize the rapid and efficient construction of the pile-column integrated assembled bridge.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated bridge construction, and in particular to a pile-column integrated prefabricated bridge cap beam elevation control device and a control method. Background Art

[0002] The prefabricated construction technology of bridges has gradually expanded from the prefabrication and assembly of the upper structure to the lower structure. Since the piles and columns in the lower structure of the bridge are often tens of meters long, in order to facilitate prefabrication and transportation, they often need to be prefabricated into multiple sections, and then transported to the site for on-site splicing. At the same time, in order to simplify on-site construction and reduce the site occupation area after construction, the traditional pedestal connection between the piles and columns is changed to a welding connection or a flange connection, that is, the pedestal structure is removed, and the lower structure of the bridge is designed as "pile-column integration". Since the "pile-column integration" structural form has high requirements for the spatial accuracy of prefabricated assembled pipe piles, the construction process of rotary drilling and then placing prefabricated pipe piles is usually adopted. However, due to the limitations of the rotary drilling process, the bottom elevation of the hole after drilling often deviates from the design value. In addition, underwater concrete will be poured into the bottom of the pile during the lowering of the prefabricated pile column, and its sinking amount often deviates from the design. The above two reasons combined will cause the pile bottom elevation to fluctuate within a certain range. In the "pile-column integration" lower structure, since each section of the pile has been prefabricated in advance, entire Pile length is fixed . Therefore, when the pile bottom elevation is uncertain, the pile top elevation will directly cause the pile top elevation to fluctuate within a certain range, and there is often an error with the designed pile bottom elevation, which makes it impossible to directly install the cap beam. The traditional approach is to increase the pile length by cutting the pile when the pile top elevation exceeds the design value or by casting concrete when the pile top elevation is lower than the design value. Since the concrete material elevation of prefabricated pipe piles is often high and there are a large number of steel frames inside, cutting the piles is very time-consuming and laborious, and must be manually removed. When using cast-in-place, the prefabricated cap beam can only be installed after the cast-in-place concrete reaches the design strength, which will inevitably affect the construction period and fail to achieve the effect of rapid construction. Based on this, it is very urgent and necessary to propose a convenient and fast pile-column integrated assembled bridge cap beam elevation control device and method. Summary of the invention

[0003] In view of the above, it is necessary to provide a pile-column integrated prefabricated bridge cap beam elevation control device and control method to achieve rapid and efficient construction of the pile-column integrated prefabricated bridge.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A pile-column integrated assembled bridge cap beam elevation control device, comprising two pressure-bearing formworks, ear plates, handling plates, extended steel bars and steel bar connecting sleeves, each pressure-bearing formwork having hanging ears at both ends, and the two ends of each pressure-bearing formwork are fixedly connected to form a hoop by bolting the hanging ears, which is clamped to the top of the prefabricated pipe pile, and the reserved steel bars at the top of the prefabricated pipe pile are located on the inner side of the hoop formed by the pressure-bearing formwork; a handling plate is provided on the outer side of each pressure-bearing formwork, and the handling plate is located between the hanging ears at both ends of the pressure-bearing formwork where it is located, and the length direction of the handling plate is parallel to the center line of the pressure-bearing formwork when the hoop is formed; the steel bar connecting sleeve is located in the hoop formed by the pressure-bearing formwork, one end of the extended steel bar is connected to the reserved steel bar through the steel bar connecting sleeve, and the other end of the extended steel bar extends out of the hoop formed by the pressure-bearing formwork for plugging into the reserved steel bar hole at the bottom of the prefabricated cap beam.

[0006] Preferably, the two hanging ears on each pressure-bearing template are symmetrically arranged.

[0007] Preferably, a grouting hole is opened at the lower part of the pressure-bearing template, and the grouting hole is located above the top surface of the prefabricated pipe pile when the pressure-bearing template is fixed on the top of the prefabricated pipe pile.

[0008] Preferably, the transport plate is located in the middle of the pressure template, and the transport plates on the two pressure templates are located on the same plane when the pressure template forms a hoop, and the plane passes through the center line of the pressure template when the pressure template forms a hoop.

[0009] Preferably, a circular hole is provided on the transport plate.

[0010] Based on the above control device, the present invention also proposes a method for controlling the elevation of a pile-column integrated assembled bridge cap beam, comprising the following steps:

[0011] (1) Hole formation;

[0012] (2) After the prefabricated pipe pile is installed in the hole, the elevation of the top of the prefabricated pipe pile is measured;

[0013] (3) Making grouting holes on the pressure-bearing formwork, making extension steel bars, and connecting the extension steel bars to the reserved steel bars at the top of the prefabricated pipe piles through steel bar connecting sleeves;

[0014] (4) Bolt the pressure-bearing formwork to the top of the prefabricated pipe pile and check the elevation of the pressure-bearing formwork;

[0015] (5) Installing the prefabricated cap beam, wherein the top of the extended steel bar is inserted into the reserved steel bar hole at the bottom of the prefabricated cap beam, and the top of the pressure-bearing formwork is in contact with the bottom of the prefabricated cap beam;

[0016] (6) grouting through the grouting holes and closing the grouting holes after grouting is completed;

[0017] (7) Construction completed.

[0018] Preferably, in step (1), the hole is drilled by rotary drilling, and the hole bottom elevation should be measured after drilling, and the height should be less than the design elevation.

[0019] Preferably, in step (6), high-strength concrete is injected through the grouting holes on the pressure formwork, and the grouting is completed when all the reserved steel bar holes on the top of the cap beam are filled with grout. The grade of the high-strength concrete used for grouting should be higher than the grade of the precast pipe pile concrete.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention proposes a pile-column integrated assembled bridge cap beam elevation control device, which can control the elevation of the prefabricated cap beam so that the elevation of the prefabricated cap beam is at the designed elevation. The device is simple to manufacture, easy to install, and easy to control.

[0022] 2. The present invention proposes a method for controlling the elevation of a pile-column integrated assembled bridge cap beam. The control method has simple steps and can intuitively and accurately adjust the elevation of the prefabricated cap beam. At the same time, the pressure-bearing formwork is used as a force transmission structure before the cast-in-place high-strength concrete hardens, thereby meeting the requirements for rapid construction of the prefabricated assembled bridge substructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a pile-column integrated assembled bridge cap beam elevation control device in use according to the present invention.

[0024] Figure 2 yes Figure 1 Middle AA cross section.

[0025] Main component symbols

[0026] In the figure: pressure formwork 1, ear plate 2, bolts 3, handling plate 4, extension steel bar 5, steel bar connecting sleeve 6, reserved steel bar 7, high-strength concrete 8, prefabricated pipe piles 9, prefabricated cap beam 10, reserved steel bar holes 11.

[0027] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0028] See also Figure 1 to Figure 2In a preferred embodiment of the present invention, a pile-column integrated assembled bridge cap beam elevation control device comprises two pressure-bearing templates 1, ear plates 2, handling plates 4, extension steel bars 5 and steel bar connection sleeves 6. Each pressure-bearing template 1 has hanging ears at both ends, and the two ends of each pressure-bearing template 1 are fixedly connected to form a hoop by connecting the hanging ears with bolts 3, which is fixed to the top of the prefabricated pipe pile 9. The reserved steel bars 7 at the top of the prefabricated pipe pile 9 are located inside the hoop formed by the pressure-bearing template 1. Preferably, the two hanging ears on each pressure-bearing template 1 are symmetrically arranged. A carrying plate 4 is provided on the outer side of each pressure-bearing template 1, and the carrying plate 4 is located between the hanging ears at both ends of the pressure-bearing template 1 where it is located. The length direction of the carrying plate 4 is parallel to the center line of the pressure-bearing template 1 when the pressure-bearing template 1 forms a hoop. The provision of the carrying plate 4 facilitates the transportation of the pressure-bearing template 1. Furthermore, a circular hole is provided on the carrying plate 4 to facilitate the transportation of the pressure-bearing template 1 by suspending the circular hole; preferably, in this embodiment, the carrying plate 4 is located in the middle of the pressure-bearing template 1, and the carrying plates 4 on the two pressure-bearing templates 1 are located on the same plane when the pressure-bearing template 1 forms a hoop, and the plane passes through the center line of the pressure-bearing template 1 when the hoop is formed. The steel bar connection sleeve 6 is located in the hoop formed by the pressure formwork 1, one end of the extension steel bar 5 is connected to the reserved steel bar 7 through the steel bar connection sleeve 6, and the other end of the extension steel bar 5 extends out of the hoop formed by the pressure formwork 1, and is used to plug into the reserved steel bar hole 11 at the bottom of the prefabricated cap beam 10, so as to adjust the elevation of the prefabricated cap beam 10 through the extension steel bar 5. Specifically, the design elevation of the prefabricated cap beam 10 is matched by adjusting the length of the extension steel bar 5. After the extension steel bar 5 is adjusted and installed and the pressure formwork 1 is fixed on the top of the prefabricated pipe pile 9, high-strength concrete 8 is injected into the inner side of the hoop formed by the pressure formwork 1, so as to install the prefabricated cap beam 10, and the elevation of the prefabricated cap beam 10 is the design elevation. In order to facilitate the injection of high-strength concrete 8, the present invention provides a grouting hole at the lower part of the pressure formwork 1, and the grouting hole is located above the top surface of the prefabricated pipe pile 9 when the pressure formwork 1 is fixed on the top of the prefabricated pipe pile 9, so as to inject into the inner side of the hoop through the grouting hole.

[0029] It should be noted that the pressure-bearing formwork 1 of the present invention contacts the bottom of the prefabricated cap beam 10 when the extended steel bars 5 are inserted into the reserved steel bar holes 11 on the prefabricated cap beam 10, and the lower part of the pressure-bearing formwork 1 is connected to the top of the prefabricated pipe pile 9, so that the deadweight of the prefabricated cap beam 10 is transferred to the prefabricated pipe pile 9; secondly, the pressure-bearing formwork 1 of the present invention not only needs to bear the deadweight of the prefabricated cap beam 10 in the initial stage, but also serves as a supporting formwork for the cast-in-place high-strength concrete 8. However, after the strength of the cast-in-place high-strength concrete 8 is increased, the vertical bearing capacity of the pressure-bearing formwork 1 The load-bearing capacity is only considered as the surplus of the load-bearing capacity, and this part of the load-bearing capacity is not considered in the design; furthermore, the pressure-bearing formwork 1 of the present invention only needs to be provided with grouting holes, and no slurry outlet holes are required. In the present invention, the slurry outlet holes can utilize the reserved steel bar holes 11 on the prefabricated cap beam 10, and the position of the grouting hole needs to be determined according to the elevation after the pile bottom construction, and it is closed after the grouting is completed; finally, it should also be pointed out that the connection length between the pressure-bearing formwork 1 of the present invention and the top of the prefabricated pipe pile 9 needs to be adjusted and determined according to the actual elevation of the bottom end of the prefabricated cap beam 10.

[0030] Based on the above-mentioned pile-column integrated assembled bridge cap beam elevation control device, the present invention proposes a pile-column integrated assembled bridge cap beam elevation control method, comprising the following steps:

[0031] (1) Drilling: The specific operation is to drill a hole by rotary drilling. After drilling, the bottom elevation of the hole should be measured. The height should be less than the design elevation, so as to ensure that the top elevation of the prefabricated pipe pile 9 after installation is not higher than the design value.

[0032] (2) The prefabricated pipe pile 9 is installed in the hole. After the installation is completed, the elevation of the top of the prefabricated pipe pile 9 is measured.

[0033] (3) A grouting hole is opened on the pressure formwork 1, and an extension steel bar 5 is manufactured. The extension steel bar 5 is connected to the reserved steel bar 7 on the top of the prefabricated pipe pile 9 through a steel bar connecting sleeve 6.

[0034] (4) Fasten the pressure formwork 1 to the top of the prefabricated pipe pile 9 by means of bolts 3, and check the elevation of the pressure formwork 1; the height of the top of the pressure formwork 1 is consistent with the design elevation of the bottom of the prefabricated cap beam 10, and the height is adjusted by the connection length between the lower part of the pressure formwork 1 and the prefabricated pipe pile 9, thereby realizing the rapid installation of the prefabricated cap beam 10.

[0035] (5) Install the prefabricated cap beam 10 , wherein the top of the extended steel bar 5 is inserted into the reserved steel bar hole 11 at the bottom of the prefabricated cap beam 10 , and the top of the pressure formwork 1 is in contact with the bottom of the prefabricated cap beam 10 .

[0036] (6) Grouting is performed through the grouting holes, and the grouting holes are closed after the grouting is completed. Specifically, high-strength concrete 8 is injected through the grouting holes on the pressure-bearing formwork 1, and the grouting is completed when all the reserved steel bar holes 11 on the top of the prefabricated cap beam 10 are filled with slurry. The grade of the high-strength concrete 8 used for grouting should be higher than that of the concrete of the prefabricated pipe piles 9.

[0037] (7) Construction completed.

[0038] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A method for controlling the elevation of a pile-column integrated assembled bridge cap beam, characterized in that: It is controlled by a pile-column integrated assembled bridge cap beam elevation control device, the pile-column integrated assembled bridge cap beam elevation control device comprises two pressure-bearing formworks, ear plates, handling plates, extended steel bars and steel bar connecting sleeves, each pressure-bearing formwork has hanging ears at both ends, and the two ends of each pressure-bearing formwork are fixedly connected to form a hoop by bolting the hanging ears, which is clamped on the top of the prefabricated pipe pile, and the reserved steel bars at the top of the prefabricated pipe pile are located on the inner side of the hoop formed by the pressure-bearing formwork; the outer side of each pressure-bearing formwork is provided with a handling plate, the handling plate is located between the hanging ears at both ends of the pressure-bearing formwork where it is located, and the length direction of the handling plate is parallel to the center line of the pressure-bearing formwork when the hoop is formed; the steel bar connecting sleeve is located in the hoop formed by the pressure-bearing formwork, one end of the extended steel bar is connected to the reserved steel bar through the steel bar connecting sleeve, and the other end of the extended steel bar extends out of the hoop formed by the pressure-bearing formwork for plugging into the reserved steel bar hole at the bottom of the prefabricated cap beam; The control method comprises the following steps: (1) Hole formation; (2) The prefabricated pipe pile is installed in the hole. After installation is completed, the elevation of the top of the prefabricated pipe pile is measured; (3) Opening grouting holes on the pressure-bearing formwork, manufacturing extension steel bars, and connecting the extension steel bars to the reserved steel bars at the top of the prefabricated pipe piles through steel bar connecting sleeves; (4) Fasten the pressure-bearing formwork to the top of the prefabricated pipe pile with bolts and check the elevation of the pressure-bearing formwork; (5) installing the prefabricated cap beam, wherein the top of the extended steel bar is inserted into the reserved steel bar hole at the bottom of the prefabricated cap beam, and the top of the pressure-bearing formwork contacts the bottom of the prefabricated cap beam; (6) grouting through the grouting hole, and closing the grouting hole after the grouting is completed; (7) Construction completed.

2. A method for controlling the elevation of a pile-column integrated assembled bridge cap beam according to claim 1, characterized in that: The two hanging ears on each pressure-bearing template are symmetrically arranged.

3. A method for controlling the elevation of a pile-column integrated assembled bridge cap beam according to claim 1, characterized in that: A grouting hole is provided at the lower part of the pressure-bearing template, and the grouting hole is located above the top surface of the prefabricated pipe pile when the pressure-bearing template is fixed on the top of the prefabricated pipe pile.

4. A method for controlling the elevation of a pile-column integrated assembled bridge cap beam according to claim 1, characterized in that: The transport plate is located in the middle of the pressure-bearing template, and the transport plates on the two pressure-bearing templates are located on the same plane when the pressure-bearing templates form a hoop, and the plane passes through the center line of the pressure-bearing template when the hoop is formed.

5. The method for controlling the elevation of a pile-column integrated assembled bridge cap beam according to claim 1, characterized in that: The transport plate is provided with a circular hole.

6. A method for controlling the elevation of a pile-column integrated assembled bridge cap beam according to claim 1, characterized in that: In step (1), a hole is drilled by rotary drilling. After drilling, the hole bottom elevation should be measured and its height should be less than the designed elevation.

7. A method for controlling the elevation of a pile-column integrated assembled bridge cap beam according to claim 1, characterized in that: In step (6), high-strength concrete is injected through the grouting holes on the pressure formwork. Grouting is completed when all the reserved steel bar holes on the top of the cap beam are filled with grout. The grade of high-strength concrete used for grouting should be higher than that of precast pipe pile concrete.

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