Temporary anchoring system and construction method for assembled pier column

Abstract

The present invention discloses a temporary anchoring system and construction method for an assembled pier column, comprising a pedestal and a pier column; a circle of pier head anchoring steel bars is vertically fixed on the pedestal, a circle of anchoring steel bar reserved grooves is reserved at the bottom of the pier column, each anchoring steel bar reserved groove is arranged along the height direction of the pier column, an eccentric wheel nut notch is arranged at the top of each anchoring steel bar reserved groove, a steel sleeve is reserved in the eccentric wheel nut notch, after the prefabricated pier column is hoisted into place, the pier head of the pier head anchoring steel bar just passes through the steel bar reserved groove and extends to the inside of the steel sleeve, the eccentric wheel nut is installed in the steel sleeve and rotated at a certain angle to fasten the pier head anchoring steel bar.

Description

Technical Field

[0001] The present invention relates to the field of assembled pier columns, and in particular to a temporary anchoring system and a construction method for assembled pier columns. Background Art

[0002] Currently, there are six common connection methods for prefabricated bridge piers: rebar grouting sleeves, rebar grouting corrugated steel pipes, component socket-and-spigot joints, rebar slot joints, wet joints, and prestressed steel bars. With the exception of prestressed steel bars, all other connection methods require post-casting of some concrete or cement mortar. Prefabricated pier columns require temporary supports until they reach their design strength. Traditional temporary supports often use temporary brackets, which present the following problems:

[0003] 1. During the process of erecting the scaffolding, there are certain construction risks because the pier columns have no support.

[0004] 2. A small number of temporary supports will limit the construction speed of prefabricated piers, while a large number will increase construction costs.

[0005] 3. When the bearing capacity of the surface foundation is poor, the foundation under the support needs to be reinforced.

[0006] 4. After the pier construction is completed, the temporary support needs to be removed. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a temporary anchoring system and construction method for prefabricated piers. The device realizes the rapid temporary anchoring connection between the prefabricated piers and the pedestals, ensuring construction safety; the piers and pedestals are self-anchored, avoiding external temporary supports; the temporary anchoring system is integrated with the piers and does not need to be dismantled after construction is completed.

[0008] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0009] In the first aspect, an embodiment of the present invention provides a temporary anchoring system for an assembled pier column, comprising a pedestal and a pier column; a circle of pier head anchoring steel bars is vertically fixed on the pedestal, and a circle of anchoring steel bar reserved grooves is reserved at the bottom of the pier column, each anchoring steel bar reserved groove is arranged along the height direction of the pier column, and an eccentric wheel nut slot is arranged at the top of each anchoring steel bar reserved slot, and a steel sleeve is reserved in the eccentric wheel nut slot. After the prefabricated pier column is hoisted into place, the pier head of the pier head anchoring steel bar just passes through the steel bar reserved slot and extends to the inside of the steel sleeve. The eccentric wheel nut is installed in the steel sleeve and rotated at a certain angle to tighten the pier head anchoring steel bar.

[0010] In a second aspect, an embodiment of the present invention further provides a construction method for a temporary anchoring system of an assembled pier column, comprising the following steps:

[0011] When prefabricating the pier column, the steel sleeve is embedded in the prefabricated pier column, and a groove for anchoring steel bars is reserved at the bottom of the pier column along the height direction of the pier column;

[0012] During the construction of the cap, multiple pier head anchor steel bars are embedded in the cap. The number of pier head anchor steel bars is equal to the number of anchor steel bar reserved grooves.

[0013] When hoisting the prefabricated pier column, align the reserved groove for the anchor steel bar with the pier head anchor steel bar. After the prefabricated pier column is hoisted into place, the pier head of the pier head anchor steel bar just extends out of the reserved groove for the eccentric wheel nut to a certain height. Finally, install the eccentric wheel nut into the reserved groove for the eccentric wheel nut and rotate it at a certain angle to tighten the pier head anchor steel bar to complete the temporary fixation of the pier column.

[0014] As a further technical solution, four pier head anchoring steel bars are provided, the four pier head anchoring steel bars are parallel to each other, and the four pier head anchoring steel bars are respectively located at the two ends of two perpendicularly intersecting center lines of the same circle.

[0015] As a further technical solution, the diameter of the head of the root pier head anchoring steel bar is larger than the diameter of other parts.

[0016] As a further technical solution, the reserved tube can be replaced with a reserved tube.

[0017] As a further technical solution, four anchor steel bar reserved grooves are provided, the four anchor steel bar reserved grooves are parallel to each other, and the four anchor steel bar reserved grooves are located on two straight lines passing through the center point of the bottom of the pier column, and the two straight lines are perpendicular to each other.

[0018] As a further technical solution, after the prefabricated pier column is inserted into place, the eccentric wheel nut is slightly lower than the top of the insertion hole of the pier column on the base.

[0019] The beneficial effects of the above embodiments of the present invention are as follows:

[0020] 1. Compared with traditional bracket supports, the present invention uses pier head steel bars and eccentric wheel nuts to quickly temporarily fix the pier column, thereby improving the safety of construction workers.

[0021] 2. The present invention eliminates the need for external temporary supports in the construction of prefabricated pier columns, thereby improving construction efficiency and saving construction costs.

[0022] 3. The present invention avoids the foundation treatment required for setting up temporary supports, thus reducing the difficulty of construction.

[0023] 4. After the construction of the prefabricated pier column of the present invention is completed, the entire temporary anchoring system becomes one with the pier column and the foundation, and does not need to be dismantled. Compared with the traditional temporary support, it reduces the construction process and improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 It is a schematic diagram of the assembly structure of the present invention;

[0026] Figure 2 、 Figure 3 It is a schematic diagram of the eccentric wheel nut of the present invention;

[0027] In the figure: 1 prefabricated pier column, 2 eccentric wheel nut slot, 3 reserved groove for anchor steel bar, 4 pier head anchor steel bar, 5 pedestal, 6 steel sleeve, 7 eccentric wheel nut. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0030] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present invention proposes a temporary anchoring system for assembled piers.

[0031] In a typical embodiment of the present invention, Figure 1As shown, this embodiment proposes a temporary anchoring system for an assembled pier column. The present invention adopts pier head steel bars and eccentric wheel nuts to temporarily anchor the prefabricated pier column to the pedestal, so as to ensure the stability of the pier column before the strength of the subsequent pouring of concrete or cement mortar is formed. It specifically includes a pedestal 5 and a pier column 1; a circle of pier head anchoring steel bars 4 is vertically fixed on the pedestal 5, and a circle of anchoring steel bar reserved grooves 3 are reserved at the bottom of the pier column 1. Each anchoring steel bar reserved groove 3 is arranged along the height direction of the pier column 1, and an eccentric wheel nut notch 2 is arranged at the top of each anchoring steel bar reserved groove 3. A steel sleeve 6 is embedded in the eccentric wheel nut notch 2. After the prefabricated pier column 1 is hoisted into place, the pier head of the pier head anchoring steel bar 4 passes through the anchoring steel bar reserved groove 3, and the pier head of the pier head anchoring steel bar 4 extends into the steel sleeve 6. The eccentric wheel nut 6 is installed in the steel sleeve 6 and rotated a certain angle to fasten the pier head anchoring steel bar.

[0032] Specifically, in this embodiment, four pier head anchoring steel bars 4 are provided, the four pier head anchoring steel bars are parallel to each other, and the four pier head anchoring steel bars are respectively located at the two ends of two vertically intersecting center lines of the same circle, that is, a hole is provided on the base 5 to match the bottom of the pier column 1, and four pier head anchoring steel bars 4 are vertically fixed in the hole, and the four pier head anchoring steel bars 4 are respectively located at the two ends of two vertically intersecting center lines at the bottom of the hole, and the head diameter of the pier head anchoring steel bar is larger than the diameter of other parts, forming a hemispherical pier head.

[0033] Specifically, the axial direction of the steel sleeve 6 is set along the radial direction of the pier 1. Furthermore, the two ends of the steel sleeve 6 in this embodiment are open, and a hole is also set on its side wall for the head of the pier head anchor steel bar 4 to pass through. The eccentric wheel nut 6 is inserted from the open end on the outside of the steel sleeve 6, cooperates with the head of the pier head anchor steel bar 4, and is tightened; the purpose of setting the steel sleeve 6 is to prevent the eccentric wheel nut 6 from exerting force directly in the prefabricated pier 1 and destroying the structure of the prefabricated pier 1.

[0034] Specifically, in this embodiment, each anchoring steel bar reserved groove 3 is set on the outer ring surface of the pier column 1, and four anchoring steel bar reserved grooves 3 are set. The shape of the four anchoring steel bar reserved grooves 3 is the same as the appearance of the pier head anchoring steel bar 4, and the size is slightly larger than the pier head anchoring steel bar 4. The four anchoring steel bar reserved grooves 3 are parallel to each other, and the four anchoring steel bar reserved grooves 3 are located on two straight lines passing through the center point of the bottom of the pier column, and the two straight lines are perpendicular to each other. An eccentric wheel nut notch 2 is set at the top of each anchoring steel bar reserved groove 3, and the notch extends along the radial direction of the pier column 1 to the outer surface of the pier column 1, so that the eccentric wheel nut 6 can be inserted from the notch and cooperate with the pier head of the pier head anchoring steel bar 4. The pier head anchoring steel bar is fastened by rotating the eccentric wheel nut 6 at a certain angle.

[0035] It should be noted that the number of the anchor steel bar reserved grooves 3 is equal to the number of the pier head anchor steel bars 4 .

[0036] Furthermore, the structure of the eccentric nut 6 in this embodiment is as follows: Figure 2 、 Figure 3 As shown, the eccentric wheel nut 6 is an existing eccentric wheel nut structure. Further, the eccentric nut can also be replaced with a common nut or other anchoring measures to be connected to the pier head reinforcement.

[0037] In the present invention, the following structural measures need to be taken for the prefabricated piers and caps:

[0038] 1. When making prefabricated piers, reserve anchor steel pipes (or notches) and eccentric nut notches.

[0039] 2. The foundation construction requires pre-embedded pier head anchor steel bars.

[0040] The specific construction methods are as follows:

[0041] When prefabricating the pier column, four steel sleeves 6 are embedded into the prefabricated pier column 1 along the radial direction of the prefabricated pier column 1, and anchor steel bar reserved grooves 3 are reserved along the height direction of the prefabricated pier column 1. The number of anchor steel bar reserved grooves 3 is equal to the number of pier head anchor steel bars, and the anchor steel bar reserved grooves 3 are arranged along the circumferential direction of the prefabricated pier column 1; when constructing the pedestal 5, the pier head anchor steel bars 4 are embedded in the pedestal 5, and when hoisting the prefabricated pier column 2, the anchor steel bar reserved grooves 3 are aligned with the pier head anchor steel bars 4 for construction. After the prefabricated pier column 1 is hoisted into place, the pier head of the pier head anchor steel bar 4 just extends into the steel sleeve 6, and finally the eccentric wheel nut 7 is installed on the steel sleeve 6 and rotated a certain angle to tighten the pier head anchor steel bar 4. In summary, the temporary fixation of the pier column is completed.

[0042] Furthermore, the length of the pier head anchor steel bar in this embodiment depends on the size of the eccentric wheel nut and the length of the anchor steel bar reserved groove. When pre-embedding the pier head anchor steel bar, the length of the pier head anchor steel bar should be strictly controlled. Too long or too short will make it impossible to install the eccentric wheel nut.

[0043] This invention is applicable to all prefabricated piers except those with prestressed connections. The schematic diagram illustrates the installation of a socket-and-spigot prefabricated pier. The eccentric nut notch should be slightly lower than the top of the pier slot on the cap, ensuring that the pre-cast concrete can be poured directly into the cap. For other connection methods, the eccentric nut notch can be lowered.

[0044] Furthermore, the above-mentioned anchor steel bar reserved groove can be replaced by a pipe, that is, a pipe is pre-buried along the height direction of the prefabricated pier column 1, and the above-mentioned pier head anchor steel bar is inserted into the pipe.

[0045] Furthermore, the pier head reinforcement can be replaced with a pier head steel rod or a columnar or strip-shaped structure made of other materials and connected with an eccentric nut.

[0046] Compared with traditional bracket supports, the present invention uses pier head steel bars and eccentric wheel nuts to quickly and temporarily fix the pier column, thereby improving the safety of construction workers. The present invention eliminates the external temporary brackets in the construction of prefabricated pier columns, which can improve construction efficiency and save construction costs. The present invention avoids the foundation treatment required for setting up temporary brackets, reducing the difficulty of construction. After the construction of the prefabricated pier column of the present invention is completed, the entire temporary anchoring system becomes one with the pier column and the foundation, and does not need to be dismantled. Compared with traditional temporary brackets, it reduces the construction process and improves construction efficiency.

[0047] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A temporary anchoring system for assembled piers, characterized in that: It includes a pedestal and a pier column; a circle of pier head anchoring steel bars is vertically fixed on the pedestal, and a circle of anchoring steel bar reserved grooves are reserved at the bottom of the pier column. Each anchoring steel bar reserved groove is arranged along the height direction of the pier column, and an eccentric wheel nut notch is arranged at the top of each anchoring steel bar reserved groove. A steel sleeve is reserved in the eccentric wheel nut notch. After the prefabricated pier column is hoisted into place, the pier head of the pier head anchoring steel bar just passes through the steel bar reserved groove and extends into the interior of the steel sleeve. The eccentric wheel nut is installed in the steel sleeve and rotated at a certain angle to fasten the pier head anchoring steel bar. The pier head anchoring steel bars are provided with four pieces, the four pier head anchoring steel bars are parallel to each other, and the four pier head anchoring steel bars are respectively located at the two ends of two perpendicularly intersecting center lines of the same circle; The four anchor steel bar reserved grooves are parallel to each other and are located on two straight lines passing through the center point of the bottom of the pier column, and the two straight lines are perpendicular to each other.

2. The temporary anchoring system for the assembled pier according to claim 1, characterized in that: The diameter of the head of the root pier head anchoring steel bar is larger than the diameter of other parts.

3. The temporary anchoring system for the assembled pier according to claim 1, characterized in that: The reserved groove is replaced by a reserved tube.

4. A temporary anchoring construction method for assembled pier columns using the temporary anchoring system according to any one of claims 1 to 3, characterized in that: The following steps are involved: When prefabricating the pier column, the steel sleeve is embedded into the prefabricated pier column along the radial direction, and a groove for anchoring steel bars is reserved at the bottom of the pier column along the height direction of the pier column; During the construction of the cap, multiple pier head anchor steel bars are embedded in the cap. The number of pier head anchor steel bars is equal to the number of anchor steel bar reserved grooves. When hoisting the prefabricated pier column, align the reserved groove for the anchor steel bar with the pier head anchor steel bar. After the prefabricated pier column is hoisted into place, the pier head of the pier head anchor steel bar just extends out of the reserved groove for the eccentric wheel nut to a certain height. Finally, install the eccentric wheel nut into the reserved groove for the eccentric wheel nut and rotate it at a certain angle to tighten the pier head anchor steel bar to complete the temporary fixation of the pier column.

5. The temporary anchoring construction method of the assembled pier column according to claim 4, characterized in that: The pier head anchoring steel bars are provided with four pieces, the four pier head anchoring steel bars are parallel to each other, and the four pier head anchoring steel bars are respectively located at two ends of two perpendicularly intersecting center lines of the same circle.

6. The temporary anchoring construction method of the assembled pier column according to claim 4, characterized in that: The diameter of the head of the root pier head anchoring steel bar is larger than the diameter of other parts.

7. The temporary anchoring construction method of the assembled pier column according to claim 4, characterized in that: The reserved groove is replaced by a reserved tube.

8. The temporary anchoring construction method of the assembled pier column according to claim 4, characterized in that: After the prefabricated pier column is inserted into place, the eccentric wheel nut is slightly lower than the top of the insertion hole of the pier column on the cap.

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