Variable cross-section reinforcement cage structure

Abstract

The utility model relates to the technical field of reinforcement cages, and discloses a variable cross-section reinforcement cage structure which comprises a reinforcement cage body and a crown beam, the reinforcement cage body is composed of a round cage and a semicircular cage, the round cage is composed of round cage main reinforcements, round cage reinforcing stirrups and round cage spiral stirrups, and the semicircular cage is composed of semicircular cage main reinforcements, semicircular cage reinforcing stirrups and semicircular cage spiral stirrups. The bottom ends of the semicircular cage main reinforcements are anchored into the circular cage, a circular cage protection layer is welded to the circular cage, a semicircular cage protection layer is welded to the semicircular cage, and the top of the circular cage and the top of the semicircular cage extend upwards to form extending reinforcements embedded into the crown beam. The integral structure and the structural strength of the reinforcement cage can be guaranteed, meanwhile, the variable-cross-section pile can be formed through one-time construction pouring, the influence on the pile body quality during later concrete chiseling is avoided, the construction efficiency is improved, and the construction period is shortened.

Description

Technical Field

[0001] This utility model patent relates to the field of steel cage technology, and more specifically, to a variable cross-section steel cage structure. Background Technology

[0002] The top-down construction method involves constructing the top slab of the cut-and-cover structure after the retaining structure and supporting piles are completed, restoring traffic on the road above, and then excavating and constructing the substructure under the top slab. Since the top surface elevation of the cut-and-cover slab is lower than the current road surface elevation, a certain height must be excavated before constructing the top slab. Therefore, the top slab design for the top-down construction method uses semi-circular piles supported by interlocking support piles, with the remaining semi-circular piles serving as permanent support structures during the excavation of the top slab.

[0003] Conventional construction methods involve pouring interlocking piles into the ground in one go, followed by excavation and then chiseling away the upper semi-circular pile body concrete. However, since the chiseling length of each pile is about 4.95m and the interlocking pile concrete has a strength grade of C35, which is relatively strong, the chiseling of the pile body concrete takes a lot of time, resulting in problems such as slow construction progress, increased manpower consumption, and material waste. Utility Model Content

[0004] The purpose of this utility model is to provide a variable cross-section steel cage structure, which aims to solve the problems of slow construction progress, increased manpower consumption and material waste in the existing technology.

[0005] This utility model is implemented as follows: a variable cross-section steel cage structure includes a steel cage body and a capping beam. The steel cage body is composed of a circular cage and a semi-circular cage. The circular cage is composed of circular cage main bars, circular cage reinforcing stirrups, and circular cage spiral stirrups. The semi-circular cage is composed of semi-circular cage main bars, semi-circular cage reinforcing stirrups, and semi-circular cage spiral stirrups. The bottom end of the semi-circular cage main bars is anchored into the circular cage. A circular cage protective layer is welded on the circular cage, and a semi-circular cage protective layer is welded on the semi-circular cage. The top of both the circular cage and the semi-circular cage has extension bars that extend upwards and are embedded in the capping beam.

[0006] Preferably, the protective layer of the circular cage is set up every 2m along the circular cage, and each set is arranged with four ear-shaped control steel bars at intervals along the circumference of the circular cage.

[0007] Preferably, the semi-circular cage protective layer is set up every 1m along the semi-circular cage, and each set is arranged with four short control steel bars at intervals along the axial direction.

[0008] Preferably, the thickness of the circular cage protective layer is 7 cm. The thickness of the semi-circular cage protective layer is 3 cm.

[0009] Preferably, both the main reinforcing bars of the round cage and the main reinforcing bars of the semi-circular cage are connected by sleeves, and the ends of the main reinforcing bars of the round cage or the main reinforcing bars of the semi-circular cage are threaded, and the inner wall of the sleeve is provided with a matching threaded hole.

[0010] Preferably, the main reinforcement bars of the semi-circular cage are anchored 2m into the circular cage, and the main reinforcement bars of the semi-circular cage inserted into the circular cage section are welded to the main reinforcement bars of the circular cage in a staggered manner.

[0011] Preferably, the semi-circular cage spiral stirrups are manually wrapped around the outside of several semi-circular cage main bars and welded to the semi-circular cage main bars.

[0012] Preferably, the reinforcement ratio of the semi-circular cage main reinforcement is greater than that of the circular cage main reinforcement.

[0013] Preferably, the spacing of the semi-circular cage spiral stirrups within 1m below the crown beam is 100mm.

[0014] Preferably, the semi-circular cage reinforcing stirrups are made of 20mm diameter steel bars and are semi-circular in shape, with a spacing of 2m between the stirrups.

[0015] Compared with the prior art, the variable cross-section steel cage structure provided by this utility model, through the integrated steel cage body formed by the combination of semi-circular cage and circular cage, can ensure the overall structure and structural strength of the steel cage, while enabling the variable cross-section pile to be cast in one construction, avoiding the impact on the pile quality caused by the later removal of concrete, improving construction efficiency and saving construction time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the variable cross-section steel cage structure provided by this utility model;

[0017] Figure 2 This is an exploded structural diagram of the variable cross-section steel cage structure provided by this utility model;

[0018] Figure 3 This is a schematic diagram of the planar structure of the variable cross-section steel cage structure provided by this utility model;

[0019] Figure 4 This is a schematic diagram of the circular cage cross-section structure of the variable cross-section steel cage structure provided by this utility model;

[0020] Figure 5 This is a schematic diagram of the semi-circular cage cross-section structure of the variable cross-section steel cage structure provided by this utility model;

[0021] Figure 6 This is a schematic diagram of the connection structure between the main reinforcement bars and the sleeve of the variable cross-section steel cage structure provided by this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Main reinforcement cage; 2. Main reinforcement of round cage; 3. Main reinforcement of semi-circular cage; 4. Reinforcing stirrups of round cage; 5. Spiral stirrups of round cage; 6. Positioning reinforcement; 7. Reinforcing stirrups of semi-circular cage; 8. Spiral stirrups of semi-circular cage; 9. Positioning short reinforcement; 10. Cap beam; 11. Extension reinforcement; 12. Sleeve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0026] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Reference Figure 1-6 The image shown is a preferred embodiment of the present invention.

[0028] The variable cross-section steel cage structure includes a steel cage body 1 and a capping beam 10. The steel cage body 1 is composed of a circular cage and a semi-circular cage. The circular cage is composed of circular cage main bars 2, circular cage reinforcing stirrups 4 and circular cage spiral stirrups 5. The semi-circular cage is composed of semi-circular cage main bars 3, semi-circular cage reinforcing stirrups 7 and semi-circular cage spiral stirrups 8. The bottom end of the semi-circular cage main bars 3 is anchored into the circular cage. A circular cage protective layer is welded on the circular cage and a semi-circular cage protective layer is welded on the semi-circular cage. The top of both the circular cage and the semi-circular cage has an extension bar 11 that extends upward and is embedded in the capping beam 10.

[0029] The integrated steel cage body 1, formed by combining semi-circular and circular cages, ensures the overall structure and structural strength of the steel cage while enabling the variable cross-section pile to be cast in one construction, avoiding the impact on the pile quality caused by the subsequent removal of concrete, improving construction efficiency, and saving construction time.

[0030] Specifically, in this embodiment, a set of protective layers is set every 2m along the round cage, and each set is arranged with four ear-shaped control steel bars 6 at intervals along the circumference of the round cage.

[0031] By setting a protective layer for the cylindrical cage, the wear caused by the contact between the cylindrical cage body and the inner wall of the pile hole can be effectively reduced when the main body of the steel cage 1 is lowered into the pile hole.

[0032] Specifically, in this embodiment, a set of semi-circular cage protective layers is set every 1m along the semi-circular cage, and four short control steel bars 9 are arranged at axial intervals in each set.

[0033] By setting a semi-circular cage protective layer, the wear caused by the contact between the semi-circular cage body and the inner wall of the pile hole can be effectively reduced when the main body of the steel cage 1 is lowered into the pile hole.

[0034] Specifically, in this embodiment, the thickness of the circular cage protective layer is 7cm, and the thickness of the semi-circular cage protective layer is 3cm.

[0035] Specifically, in this embodiment, both the main reinforcing bars 2 and the semi-circular main reinforcing bars 3 are connected by sleeves 12. The ends of the main reinforcing bars 2 or the semi-circular main reinforcing bars 3 connected are threaded, and the inner wall of the sleeve 12 is provided with a threaded hole that matches it.

[0036] With the sleeve 12, the main reinforcement bars can be connected easily and quickly, which facilitates subsequent construction and further ensures the quality of the project while shortening the construction period.

[0037] Specifically, in this embodiment, the semi-circular cage main reinforcement 3 is anchored 2m into the round cage, and the semi-circular cage main reinforcement 3 inserted into the round cage section is staggered and welded with the round cage main reinforcement 2, which can well ensure the overall structural strength and structural rigidity of the steel cage body 1 after the semi-circular cage and the round cage are connected.

[0038] Specifically, in this embodiment, the semi-circular cage spiral stirrups 8 are manually wrapped around the outside of several semi-circular cage main bars 3 and welded to the semi-circular cage main bars 3. The spacing of the semi-circular cage spiral stirrups 8 within 1m below the cap beam 10 is 100mm.

[0039] Specifically, in this embodiment, the reinforcement ratio of the semi-circular cage main reinforcement 3 is greater than that of the circular cage main reinforcement 2, which can improve the structural strength of the semi-circular section of the variable cross-section semi-circular support pile after concrete pouring.

[0040] Specifically, in this embodiment, the semi-circular cage reinforcing stirrups 7 are made of 20mm diameter steel bars and are semi-circular in shape. The spacing between the semi-circular cage reinforcing stirrups 7 is 2m.

[0041] The semi-circular cage reinforcement made of 20mm steel bars can further ensure the structural strength of the semi-circular section of the variable cross-section semi-circular support pile.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable cross-section steel cage structure, characterized in that, The system includes a main steel cage and a capping beam. The main steel cage consists of a circular cage and a semi-circular cage. The circular cage consists of main reinforcing bars, reinforcing stirrups, and spiral stirrups. The semi-circular cage consists of main reinforcing bars, reinforcing stirrups, and spiral stirrups. The bottom ends of the main reinforcing bars are anchored into the circular cage. A protective layer is welded onto the circular cage and a protective layer is welded onto the semi-circular cage. Both the circular and semi-circular cages have extension bars that extend upwards and are embedded into the capping beam.

2. The variable cross-section steel cage structure as described in claim 1, characterized in that, The protective layer of the circular cage is set up every 2m along the circular cage, and each set is arranged with four ear-shaped control steel bars at intervals along the circumference of the circular cage.

3. The variable cross-section steel cage structure as described in claim 1, characterized in that, The semi-circular cage protective layer is set up every 1m along the semi-circular cage, and each set is arranged with four short control steel bars at intervals along the axial direction.

4. The variable cross-section steel cage structure as described in claim 1, characterized in that, The thickness of the round cage protective layer is 7cm, and the thickness of the semi-circular cage protective layer is 3cm.

5. The variable cross-section steel cage structure as described in claim 1, characterized in that, Both the main reinforcing bars of the round cage and the main reinforcing bars of the semi-circular cage are connected by sleeves. The ends of the main reinforcing bars of the round cage or the main reinforcing bars of the semi-circular cage are threaded, and the inner wall of the sleeve is provided with a matching threaded hole.

6. The variable cross-section steel cage structure as described in claim 1, characterized in that, The main reinforcement bars of the semi-circular cage are anchored 2m into the circular cage, and the main reinforcement bars of the semi-circular cage inserted into the circular cage section are welded to the main reinforcement bars of the circular cage in a staggered manner.

7. The variable cross-section steel cage structure as described in claim 1, characterized in that, The semi-circular cage spiral stirrups are manually wrapped around the outside of several semi-circular cage main bars and welded to the semi-circular cage main bars.

8. The variable cross-section steel cage structure as described in claim 1, characterized in that, The reinforcement ratio of the main reinforcement bars in the semi-circular cage is greater than that in the main reinforcement bars of the circular cage.

9. The variable cross-section steel cage structure as described in claim 1, characterized in that, The spacing of the semi-circular cage spiral stirrups within 1m below the cap beam is 100mm.

10. The variable cross-section steel cage structure as described in claim 1, characterized in that, The semi-circular cage reinforcing stirrups are made of 20mm diameter steel bars and are arranged at 2m intervals.

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