Guiding and positioning device for installation of pile foundation reinforcement cage

Abstract

The utility model discloses a guiding and positioning device for installation of a pile foundation reinforcement cage, which comprises a limit guiding frame sleeved on the periphery of the pile foundation reinforcement cage, and the limit guiding frame comprises a plurality of steel pipes arranged at equal intervals along the axial direction and a plurality of reinforcement reinforcing rings for fixing the plurality of steel pipes together. At least three positioning clamps are arranged on the outer side of the upper end of the limiting guide frame in the radial direction, clamping grooves matched with the steel pipe are formed in the inner ends of the positioning clamps, the clamping grooves are in an opening shape on the inner sides of the positioning clamps, clamping rings matched with the clamping grooves are fixed to the top end of the steel pipe, and fastening mechanisms are arranged at the outer ends of the positioning clamps. The pile foundation reinforcement cage is guided and positioned through the limiting guide frame, the pile foundation reinforcement cage is kept in the middle, the steel pipe can move up and down in the clamping groove of the positioning clamp, and therefore the limiting guide frame can downwards stretch into a pile casing, and the positioning effect on the pile foundation reinforcement cage is improved.

Description

Technical Field

[0001] The utility model relates to a guide and positioning device for installing a pile foundation reinforcement cage. Background Art

[0002] Bridge pile foundations are a crucial component of bridge engineering, bearing the brunt of the forces exerted by the bridge's superstructure and substructure, effectively transmitting these forces to the foundation. During highway bridge pile foundation construction, due to factors such as topography, surrounding environment, and construction techniques, the pile foundation construction ground often rises a certain height above the designed pile top. This necessitates the installation of a steel cage suspended within the borehole using hangers. Traditionally, the cage is installed by extending it section by section and lowering it, using its own weight to maintain verticality. The top of the final cage section is welded to the hanger, which is then lowered to the designed elevation. Finally, the hanger is secured to the shoulder beam at the opening. When the hanger is set too long, it is difficult to control the steel cage submerged in the mud to be centered because the steel bars are easy to bend and the horizontal restraint capacity is insufficient; due to the insufficient accuracy of the hanger setting, the center of gravity of the steel cage is easily tilted, resulting in a large deviation of the bottom section; the uneven extrusion of concrete during underwater concrete pouring can easily cause the steel cage to deviate. The deviation of the pile foundation steel cage will result in insufficient thickness of the steel cage protective layer, which will not be able to effectively prevent the steel bars from being corroded by moisture, oxygen, salt, organic matter and other substances in the soil, greatly reducing the durability and bearing capacity of the structure. Utility Model Content

[0003] In view of the above problems, the present invention provides a guide and positioning device for installing a pile foundation reinforcement cage, which effectively solves the problems pointed out in the background technology.

[0004] The technical solution adopted in this utility model is:

[0005] A pile foundation steel cage installation guide and positioning device includes a limiting guide frame that is sleeved around the outside of the pile foundation steel cage, the limiting guide frame includes a plurality of steel pipes equidistantly arranged along the axial direction, and a plurality of steel reinforcement rings that fix the plurality of steel pipes together, at least three positioning fixtures are radially provided on the outer side of the upper end of the limiting guide frame, the inner end of the positioning fixture is provided with a slot that matches the steel pipe, the slot is open on the inner side of the positioning fixture, the top end of the steel pipe is fixed with a clamping ring that matches the slot, and the outer end of the positioning fixture is provided with a fastening mechanism.

[0006] Preferably, the fastening mechanism includes a fixing groove provided at the bottom of the outer end of the positioning fixture, and a fastening bolt provided on the side of the fixing groove. The positioning fixture is provided with a thread matching the fastening bolt on the side of the fixing groove. When the fastening bolt is tightened, the front end of the fastening bolt moves toward the fixing groove, thereby achieving the purpose of clamping the casing.

[0007] Preferably, a casing is provided on the outer periphery of the pile foundation reinforcement cage, and the fixing groove is clamped on the top of the casing.

[0008] The top of the casing is clamped by the fixing groove, and the casing is clamped from the side of the casing by the fastening bolt, so that the positioning fixture is tightly clamped on the casing. The structure is simple and the construction is convenient.

[0009] Preferably, the steel pipe is a Ø42 steel pipe, the steel reinforcement ring is a Ø25 threaded steel bar, and the outer diameter of the steel reinforcement ring is 2 cm smaller than the inner diameter of the pile foundation steel cage.

[0010] The utility model adopts a limiting guide frame to guide and position the pile foundation steel cage, so that the pile foundation steel cage remains centered, and the steel pipe of the utility model can move up and down in the slot of the positioning fixture, so that the limiting guide frame can extend downward into the casing, thereby improving the positioning effect of the pile foundation steel cage. In actual use, the steel pipe matching the positioning fixture can be welded and extended according to the target position of the limiting guide frame, which can further improve the positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0013] Figure 3 for Figure 1 Schematic diagram of the top view structure;

[0014] Figure 4 It is a structural diagram of the limiting guide frame;

[0015] Figure 5 It is a structural diagram of the positioning fixture;

[0016] Figure 6 This is a schematic diagram of the top structure of the positioning fixture;

[0017] Figure 7 for Figure 5 The left structural diagram of

[0018] Figure 8 for Figure 5 The right side structural diagram of

[0019] Figure 9 It is a structural schematic diagram of the utility model during construction. DETAILED DESCRIPTION

[0020] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0021] 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 application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0024] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] The present invention will be described in further detail below through specific embodiments with reference to the accompanying drawings.

[0027] like Figure 1-8 As shown, a pile foundation steel cage installation guide and positioning device includes a limiting guide frame 2 sleeved around the outer periphery of the pile foundation steel cage 1, the limiting guide frame 2 includes a plurality of steel pipes 21 arranged equidistantly along the axial direction, and a plurality of steel reinforcement rings 22 for fixing the plurality of steel pipes 21 together, the steel pipe 21 can be fixed on the outside of the steel reinforcement ring 22, and can also be fixed on the inside of the steel reinforcement ring 22, at least three positioning fixtures 3 are radially provided on the outer side of the upper end of the limiting guide frame 2, the inner end of the positioning fixture 3 is provided with a card slot 31 matching the steel pipe 21, the card slot 31 is open on the inner side of the positioning fixture 3, the outer diameter of the steel pipe 21 is smaller than the width of the card slot 31, preferably 1 cm, the top end of the steel pipe 21 is fixed with a clamping ring 23 matching the card slot 31, the clamping ring 23 is fixed to the top end of the steel pipe 21 by welding, during actual construction, some steel pipes 21 can be selected as needed to weld clamping rings 23 on their tops, and the outer end of the positioning fixture 3 is provided with a fastening mechanism.

[0028] Furthermore, the fastening mechanism includes a fixing groove 32 provided at the bottom of the outer end of the positioning fixture 3, and a fastening bolt 33 provided on the side of the fixing groove 32. When the fastening bolt 33 is tightened, the front end of the fastening bolt 33 moves into the fixing groove 32 until the casing 4 is clamped.

[0029] Furthermore, a casing 4 is provided on the outer periphery of the pile foundation reinforcement cage 1 , and the fixing groove 32 is stuck on the top of the casing 4 .

[0030] Furthermore, the steel pipe 21 is made of Ø42 steel pipe, and the steel reinforcement ring 22 is made of Ø25 threaded steel bar. The outer diameter of the steel reinforcement ring 22 is 2 cm smaller than the inner diameter of the pile foundation steel cage 1. At this time, the steel pipe 21 is fixed on the inner side of the steel reinforcement ring 22.

[0031] The steel reinforcement ring 22 of the present invention is smaller than the pile foundation steel cage 1, so that the limiting guide frame 2 is located on the inner side of the pile foundation steel cage 1, so that the limiting guide frame 2 is closer to the hanging rod 6 that fixes the pile foundation steel cage 1 in the later stage, thereby effectively limiting the activity area of ​​the hanging rod 6 in the horizontal direction and improving the positioning effect.

[0032] The method of using the utility model is as follows:

[0033] like Figure 9 As shown, before the spiral reinforcement of the last section of the pile foundation reinforcement cage 1 is buried in the hole, the steel pipe of the limiting guide frame 2 is evenly spaced and inserted into the main reinforcement of the pile foundation reinforcement cage, avoiding the hanger 6, to the top surface of the spiral reinforcement, and four positioning fixtures 3 are evenly spaced and installed on the casing 4, and the slots 31 are correspondingly sleeved on the steel pipe 21 of the limiting guide frame 2. After adjusting to a uniform horizontal elevation, tighten the fastening bolts 33 to fix it; after the device is installed, the limiting guide frame 2 and the pile foundation reinforcement cage 1 are slowly lowered along the slots 31 until the top clamping ring 23 of the steel pipe 21 is in close contact with the slots 31, and then the main reinforcement of the pile foundation reinforcement cage 1 continues to be lowered along the steel bars of the limiting guide frame 2 to the design elevation. After checking and adjusting the limiting guide frame 2 to be consistent with the design center of the pile foundation reinforcement cage 1, the pile foundation reinforcement cage 1 is fixed with the hanger 6; when the underwater concrete is poured to the bottom of the limiting guide frame 2, the device is slowly lifted and removed.

[0034] The utility model has the advantages of simple structure, reasonable material and easy operation, and can effectively avoid the deviation of the pile foundation reinforcement cage installation when in use, ensure the thickness of the protective layer, improve the durability of the structure and ensure the bearing capacity.

[0035] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments and is subject to numerous variations. All variations that can be directly derived or conceived by a person of ordinary skill in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A guide and positioning device for installing a pile foundation reinforcement cage, characterized in that: The invention comprises a limiting guide frame (2) sleeved around the outer periphery of a pile foundation reinforcement cage (1), wherein the limiting guide frame (2) comprises a plurality of steel pipes (21) equidistantly arranged along the axial direction, and a plurality of reinforcement rings (22) for fixing the plurality of steel pipes (21) together, at least three positioning fixtures (3) are radially provided on the outer side of the upper end of the limiting guide frame (2), a slot (31) matching the steel pipe (21) is provided at the inner end of the positioning fixture (3), the slot (31) is open on the inner side of the positioning fixture (3), a clamping ring (23) matching the slot (31) is fixed to the top end of the steel pipe (21), and a fastening mechanism is provided on the outer end of the positioning fixture (3).

2. A guide and positioning device for installing a pile foundation reinforcement cage according to claim 1, characterized in that: The fastening mechanism comprises a fixing groove (32) provided at the bottom of the outer end of the positioning fixture (3), and a fastening bolt (33) provided on the side of the fixing groove (32).

3. A guide and positioning device for installing a pile foundation reinforcement cage according to claim 2, characterized in that: A casing (4) is provided on the outer periphery of the pile foundation reinforcement cage (1), and the fixing groove (32) is clamped on the top of the casing (4).

4. A pile foundation reinforcement cage installation guide and positioning device according to claim 1, characterized in that: The steel pipe (21) is a Ø42 steel pipe, the steel reinforcement ring (22) is a Ø25 threaded steel bar, and the outer diameter of the steel reinforcement ring (22) is 2 cm smaller than the inner diameter of the pile foundation steel cage (1).

Images