An expanded diameter steel cage for drilling holes of different diameters

Abstract

The utility model discloses an expanded diameter steel bar cage for drilling holes of unequal diameters, comprising a plurality of vertically distributed vertical steel bars, the plurality of vertical steel bars are distributed in a circular ring shape, the outer sides of the plurality of vertical steel bars are movably wound with spiral stirrups along their length direction, the inner sides of the plurality of vertical steel bars are provided with supporting steel bars parallel to the vertical steel bars, a connecting rod is hinged between the supporting steel bars and the vertical steel bars, an elastic body is fixed between the connecting rod and the supporting steel bars, in the initial state, the connecting rod compresses the elastic body obliquely downward, the diameter of the steel bar cage formed by the plurality of vertical steel bars is adapted to the size of the upper section of the drilling hole, after the steel bar cage enters the upper section of the drilling hole, the upper section of the drilling hole constrains the elastic body, after the steel bar cage enters the lower section of the drilling hole, the diameter of the lower section of the drilling hole is greater than the diameter of the upper section of the drilling hole, the constraint on the steel bar cage is released, the elastic body drives the connecting rod to rotate to a horizontal state, and drives the vertical steel bars to move outward. The utility model has a simple structure, is easy to operate, saves time and effort, and has high construction efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation, and in particular to an expanded diameter steel bar cage used for drilling holes of unequal diameters. Background Art

[0002] Bored piles are an important type of pile foundation in construction and bridge engineering. During the construction process, the pile holes are first excavated and cleaned by mechanical or manual drilling, followed by the installation of steel cages, and finally concrete pouring. After the steel cage is placed in the drilled hole, the steel cage is prone to float up during the concrete pouring process. Therefore, unequal diameter drilled holes with a larger lower section and a smaller upper section are produced to prevent the steel cage from floating up. The steel cage that matches this type of drilled hole can generally be expanded in diameter, but the current expansion structure of the expanded steel cage is relatively complex, which makes it difficult to operate the steel cage when expanding in the drilled hole, and requires a lot of time and effort to adjust, which is time-consuming and labor-intensive, and has low construction efficiency. Utility Model Content

[0003] The utility model aims to provide an expanded diameter steel bar cage for drilling holes of unequal diameters, which has a simple structure, is easy to operate, saves time and effort, and has high construction efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following solutions:

[0005] A diameter-expanded steel bar cage for drilling holes of unequal diameters comprises a plurality of vertically distributed vertical steel bars, wherein the plurality of vertical steel bars are distributed in a circular ring shape, spiral stirrups are movably arranged around the outer sides of the plurality of vertical steel bars along their length directions, supporting steel bars parallel to the vertical steel bars are arranged on the inner sides of the plurality of vertical steel bars, connecting rods are hinged between the supporting steel bars and the vertical steel bars, and an elastic body is fixed between the connecting rod and the supporting steel bars. In an initial state, the connecting rod compresses the elastic body obliquely downward, and the diameter of the steel bar cage formed by the plurality of vertical steel bars is adapted to the size of the upper section of the drilling hole. After the steel bar cage enters the upper section of the drilling hole, the upper section of the drilling hole constrains the elastic body. After the steel bar cage enters the lower section of the drilling hole, the diameter of the lower section of the drilling hole is larger than the diameter of the upper section of the drilling hole, thereby releasing the constraint on the steel bar cage, and the elastic body drives the connecting rod to rotate to a horizontal state, thereby driving the vertical steel bars to move outward.

[0006] Due to the adoption of the above technical solution, the vertical steel bars are the main load-bearing parts of the steel cage, distributed vertically and arranged in a circular manner to ensure the overall stability of the steel cage. The spiral stirrups are flexibly arranged along the outer side of the vertical steel bars to enhance the lateral compressive strength of the steel cage and also help maintain the shape of the steel cage. The supporting steel bars are located on the inner side of multiple vertical steel bars and are parallel to the vertical steel bars, playing a supporting and connecting role. The connecting rod connects the vertical steel bars and the supporting steel bars, and is equipped with an elastic body to achieve automatic adjustment of the diameter of the steel cage. Initial state: The connecting rod compresses the elastic body obliquely downward to match the diameter of the steel cage with the size of the upper section of the borehole, so that the steel cage can smoothly enter the borehole. Entering the upper section of the borehole: Due to the size limit of the upper section of the borehole, the elastic body is constrained to maintain the initial diameter of the steel cage. Entering the lower section of the borehole: When the steel cage enters the lower section of the borehole, the constraint on the steel cage is released because the diameter of the lower section is larger than that of the upper section. At this time, the elastomer begins to release the stored energy, driving the connecting rod from a downward slanting state to a horizontal state. The rotation of the connecting rod drives the vertical steel bars to move outward, increasing the diameter of the lower section of the steel cage to adapt to the size of the lower section of the borehole. Through the cooperation of the elastomer and the connecting rod, the steel cage can automatically adapt to boreholes of different diameters, reducing the adjustment work during construction and improving construction efficiency. The steel cage composed of multiple vertical steel bars and spiral stirrups has good structural stability and can withstand greater lateral pressure. No complicated operating equipment is required. The diameter adjustment can be automatically completed by simply placing the steel cage into the borehole. The structure is simple and easy to operate. This design of an expanded diameter steel cage for unequal diameter boreholes has the advantages of stable structure, strong adaptability and easy operation, and has important application value in foundation engineering construction.

[0007] Optionally, the vertical steel bars are welded with limiting collars that allow the spiral stirrups to pass through, and the limiting collars are distributed on multiple vertical steel bars to fit the spiral stirrups. The spiral stirrups pass through the limiting collars on each vertical steel bar once in a spiral shape along the length direction of the steel cage.

[0008] Optionally, limit blocks are provided at both ends of the spiral stirrups, and a margin is provided between the limit blocks and adjacent limit collars to allow the spiral stirrups to move along with the expansion of the steel cage.

[0009] Optionally, the spiral stirrups are round steel bars with smooth surfaces.

[0010] Optionally, the restraining member is at least one nylon rope or one iron wire.

[0011] Optionally, the restraining members are arranged at intervals along the length direction of the steel cage.

[0012] Optionally, the supporting steel bars are threaded round steel bars, and the diameter of the supporting steel bars is greater than the diameter of the vertical steel bars.

[0013] Optionally, a guide cap is provided at the lower end of the supporting steel bar.

[0014] Optionally, the elastic body is a return spring, and both ends of the return spring are respectively connected to the connecting rod and the supporting steel bar.

[0015] The utility model has the beneficial effects:

[0016] 1. In the utility model, in the initial state: the connecting rod compresses the elastic body obliquely downward to make the diameter of the steel cage match the size of the upper section of the borehole, so that the steel cage can smoothly enter the borehole, and enter the upper section of the borehole: due to the size limit of the upper section of the borehole, the elastic body is constrained to maintain the initial diameter of the steel cage, and enter the lower section of the borehole: when the steel cage enters the lower section of the borehole, since the diameter of the lower section is larger than that of the upper section, the constraint on the steel cage is released. At this time, the elastomer begins to release the stored energy, driving the connecting rod from a downward slanting state to a horizontal state. The rotation of the connecting rod drives the vertical steel bars to move outward, increasing the diameter of the lower section of the steel cage to adapt to the size of the lower section of the borehole. Through the cooperation of the elastomer and the connecting rod, the steel cage can automatically adapt to boreholes of different diameters, reducing the adjustment work during construction and improving construction efficiency. The steel cage composed of multiple vertical steel bars and spiral stirrups has good structural stability and can withstand greater lateral pressure. No complicated operating equipment is required. The diameter adjustment can be automatically completed by simply placing the steel cage into the borehole. The structure is simple and easy to operate. This design of an expanded diameter steel cage for unequal diameter boreholes has the advantages of stable structure, strong adaptability and easy operation, and has important application value in foundation engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of the steel cage of the utility model when entering the upper section of the drill hole;

[0018] Figure 2 This is a schematic diagram of the structure of the steel cage of the utility model after entering the lower section of the drill hole;

[0019] Figure 3 Top view of the steel cage.

[0020] Figure numerals: 1-lower section of drilling, 2-connecting rod, 3-limiting collar, 4-vertical steel bar, 5-supporting steel bar, 6-limiting block, 7-constraint, 8-elastic body, 9-spiral stirrup, 10-upper section of drilling, 11-guide cap. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0022] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example

[0025] A diameter-expanding steel bar cage for drilling holes of unequal diameters comprises a plurality of vertically distributed vertical steel bars 4, wherein the plurality of vertical steel bars 4 are distributed in a circular ring shape, and spiral stirrups 9 are movably arranged around the outer sides of the plurality of vertical steel bars 4 along their length direction, and support steel bars 5 parallel to the vertical steel bars 4 are arranged on the inner sides of the plurality of vertical steel bars 4, and a connecting rod 2 is hinged between the support steel bars 5 and the vertical steel bars 4, and an elastic body 8 is fixed between the connecting rod 2 and the support steel bars 5. In the initial state, the connecting rod 2 compresses the elastic body 8 obliquely downward, and the diameter of the steel bar cage formed by the plurality of vertical steel bars 4 is adapted to the size of an upper section 10 of the drilling hole. After the steel bar cage enters the upper section 10 of the drilling hole, the upper section 10 of the drilling hole constrains the elastic body 8. After the steel bar cage enters the lower section 1 of the drilling hole, the diameter of the lower section 1 of the drilling hole is larger than the diameter of the upper section 10 of the drilling hole, and the constraint on the steel bar cage is released, and the elastic body 8 drives the connecting rod 2 to rotate to a horizontal state, thereby driving the vertical steel bars 4 to move outward.

[0026] In this embodiment, the vertical steel bars 4 are the main load-bearing parts of the steel cage and are distributed vertically. Figure 3 As shown, the steel cage is arranged in a circular ring to ensure the overall stability of the steel cage. The spiral stirrups 9 are movably arranged along the outer side of the vertical steel bars 4 to enhance the lateral compressive strength of the steel cage and also help maintain the shape of the steel cage. The support steel bars 5 are located inside the multiple vertical steel bars 4 and are parallel to the vertical steel bars 4 to play a supporting and connecting role. The connecting rod 2 connects the vertical steel bars 4 and the support steel bars 5 and is equipped with an elastic body 8 to achieve automatic adjustment of the diameter of the steel cage. Figure 1As shown, in the initial state: the connecting rod 2 compresses the elastic body 8 obliquely downward, so that the diameter of the steel cage matches the size of the upper section 10 of the drill hole, which facilitates the steel cage to smoothly enter the drill hole and enter the upper section 10 of the drill hole: due to the size limit of the upper section 10 of the drill hole, the elastic body 8 is constrained to maintain the initial diameter of the steel cage, as shown in FIG. Figure 2 As shown, the steel cage enters the lower section 1 of the borehole: when the steel cage enters the lower section 1 of the borehole, the constraint on the steel cage is released because the diameter of the lower section 1 of the borehole is larger than the diameter of the upper section 10 of the borehole. At this time, the elastic body 8 begins to release the stored energy, driving the connecting rod 2 from the oblique downward state to the horizontal state. The rotation of the connecting rod 2 drives the vertical steel bars 4 to move outward, so that the diameter of the lower section of the steel cage increases to adapt to the size of the lower section 1 of the borehole. Through the cooperation of the elastic body 8 and the connecting rod 2, the steel cage can automatically adapt to boreholes of different diameters, reducing the adjustment work during construction and improving the construction efficiency. The steel cage composed of multiple vertical steel bars 4 and spiral stirrups 9 has good structural stability and can withstand large lateral pressure. No complicated operating equipment is required. The diameter adjustment can be automatically completed by simply placing the steel cage into the borehole. The structure is simple and easy to operate. This design of an enlarged diameter steel cage for unequal diameter boreholes has the advantages of stable structure, strong adaptability and easy operation, and has important application value in foundation engineering construction.

[0027] Furthermore, the vertical steel bars 4 are welded with limiting collars 3 that allow the spiral stirrups 9 to pass through, and the limiting collars 3 are adapted to the spiral stirrups 9 distributed on the multiple vertical steel bars 4. The spiral stirrups 9 pass through the limiting collars 3 on each vertical steel bar 4 once in a spiral shape along the length direction of the steel cage.

[0028] Specifically, multiple vertical steel bars 4 are distributed in a circular shape, serving as the main load-bearing part of the steel cage. A limiting collar 3 is welded on each vertical steel bar 4. The limiting collar 3 is used to ensure the stable position of the spiral stirrup 9 on the steel cage. These collars are distributed along the length direction of the vertical steel bars 4, and their size and spacing match the diameter and winding spacing of the spiral stirrup 9. The spiral stirrup 9 passes through the limiting collar 3 on each vertical steel bar 4 in a spiral shape along the length direction of the steel cage. Due to the existence of the limiting collar 3, the spiral stirrup 9 can maintain a stable position during the diameter change of the steel cage to prevent it from slipping or dislocation. A support steel bar 5 parallel to the vertical steel bar 4 is arranged on the inner side of the steel bar 4. The support steel bar 5 is connected to the vertical steel bar 4 by a connecting rod 2. An elastic body 8 is fixed between the connecting rod 2 and the support steel bar 5. In the initial state, the connecting rod 2 compresses the elastic body 8 obliquely downward to make the diameter of the steel cage match the size of the upper section 10 of the borehole. When the steel cage enters the lower section 1 of the borehole and the diameter needs to be increased, the elastic body 8 releases the stored energy and drives the connecting rod 2 to a horizontal state, thereby driving the vertical steel bar 4 to move outward, so that the diameter of the lower section of the steel cage increases. Through the design of the limiting collar 3, the position of the spiral hoop 9 on the steel cage is fixed, which enhances the overall stability of the steel cage. The introduction of the limiting collar 3 simplifies the installation process of the spiral hoop 9 and reduces the adjustment work during construction. This design of the enlarged diameter steel cage with a limiting collar 3 not only ensures the stability and adaptability of the steel cage, but also improves the construction efficiency and safety. It is particularly suitable for basic engineering construction with complex geological conditions and large aperture changes.

[0029] Furthermore, both ends of the spiral stirrup 9 are provided with limit blocks 6, and a margin is provided between the limit block 6 and the adjacent limit collar 3 to allow the spiral stirrup 9 to move along with the expansion of the steel cage.

[0030] Specifically, Figure 1As shown, multiple vertical steel bars 4 are distributed in a circular ring shape, and limited collars 3 are welded thereon. The spacing and size of the limited collars 3 match the diameter and winding spacing of the spiral stirrups 9. The spiral stirrups 9 pass through the limited collars 3 on each vertical steel bar 4 in a spiral shape along the length direction of the steel cage. In order to ensure the stability of the spiral stirrups 9 during movement and prevent them from slipping, limited blocks 6 are provided at both ends of the spiral stirrups 9. A certain margin is left between the limited blocks 6 and the adjacent limited collars 3. This margin allows the spiral stirrups 9 to follow the steel cage when the diameter is expanded. The steel cage can move with the movement of the steel cage without encountering excessive resistance or dislocation. Through the design of the limit block 6 and the limit ring 3, the spiral stirrup 9 can maintain a stable position on the steel cage and move smoothly with the expansion of the steel cage. The margin design between the limit block 6 and the limit ring 3 ensures that the spiral stirrup 9 will not slip or dislocate during the movement, thereby improving the overall stability and safety of the steel cage. This design simplifies the installation process of the steel cage, improves construction efficiency, and can adapt to drilling holes of different diameters, and has a wide range of applicability. In summary, this expanded diameter steel cage with a limit block 6 and a margin design improves construction efficiency and safety while maintaining stability and mobility, and is particularly suitable for foundation engineering construction with complex geological conditions and large aperture changes.

[0031] Furthermore, the spiral stirrups 9 are round steel bars with smooth surfaces.

[0032] Specifically, in the expanded steel cage, the spiral stirrup 9 plays an important role in enhancing the lateral compressive strength of the steel cage and maintaining the shape of the steel cage. In order to ensure that the spiral stirrup 9 can move smoothly when the steel cage is expanded, and the cooperation with the limiting ring 3 is smoother, a round steel bar with a smooth surface is selected as the spiral stirrup 9. When the round steel bar with a smooth surface passes through the limiting ring 3, it can reduce the friction resistance between the limiting ring 3 and the spiral stirrup 9, so that the spiral stirrup 9 can move smoothly with the expansion of the steel cage. The smooth surface reduces the friction between the limiting ring 3, reduces the wear degree of the spiral stirrup 9 and the limiting ring 3, and prolongs their service life. Since the round steel bar with a smooth surface has a uniform diameter and shape, it can better cooperate with the limiting ring 3 and maintain a stable spiral shape, thereby enhancing the overall stability of the steel cage. Selecting a round steel bar with a smooth surface as the spiral stirrup 9 can not only ensure that the spiral stirrup 9 moves smoothly during the expansion process, reduce the friction and wear between the limiting ring 3, but also enhance the overall stability of the steel cage and improve construction efficiency and safety. Therefore, in the design of the expanded diameter steel cage, the use of round steel bars with smooth surfaces as spiral stirrups 9 should be given priority.

[0033] Furthermore, the restraining member 7 is at least one nylon rope or one iron wire.

[0034] Furthermore, the restraining members 7 are arranged at intervals along the length direction of the steel cage.

[0035] Specifically, the restraint 7 is used to temporarily restrain the diameter of the steel cage when the steel cage enters the upper section 10 of the borehole to ensure its smooth entry. Considering factors such as the durability, flexibility and ease of operation of the material, the restraint 7 can select at least one nylon rope or one iron wire. Nylon rope: Nylon rope has excellent wear resistance, tensile strength and flexibility, and can well adapt to the diameter expansion requirements of the steel cage. At the same time, the nylon rope is light in texture and easy to operate in construction. Iron wire: Iron wire also has good tensile strength and flexibility, and is relatively low in cost. However, compared with nylon rope, iron wire may be more prone to rust and wear, and needs to be rust-proofed before use.

[0036] In order to ensure that the restraint 7 can effectively restrain the steel cage, the restraint 7 should be arranged at intervals along the length direction of the steel cage, so that the steel cages at different positions can be uniformly restrained to prevent local deformation or failure during the diameter expansion process. Specifically, according to the actual situation of the drilling and the size of the steel cage, a restraint 7 can be arranged on the steel cage at a certain distance (such as every meter or every two meters), and the restraint 7 can be tightly combined with the steel cage by tying, fixing, etc. to ensure its stability and reliability. In the design of the diameter expansion steel cage, nylon rope or iron wire is selected as the restraint 7, and is arranged at intervals along the length direction of the steel cage, which can effectively ensure the stability and safety of the steel cage during the diameter expansion process. At the same time, this arrangement method is also convenient for construction operations and improves construction efficiency.

[0037] In actual operation, after the steel cage is hoisted above the drill hole, the lower end of the steel cage enters the drill hole, until the first restraint 7 from bottom to top is close to the drill hole entrance, the restraint 7 is released, and then the lower steel cage is released until the uppermost restraint 7 is released.

[0038] Furthermore, the support steel bar 5 is a threaded round steel bar, and the diameter of the support steel bar 5 is greater than the diameter of the vertical steel bar 4 .

[0039] Specifically, a larger diameter of the support steel bar 5 can provide a larger support area, thereby enhancing the overall structural stability of the steel cage. During the expansion process, the support steel bar 5 can effectively support the vertical steel bars 4 to prevent them from excessive bending or deformation. Since the diameter of the support steel bar 5 is larger, its bearing capacity is also improved accordingly, which means that the steel cage can withstand greater external pressure or tension, ensuring that it can remain stable under complex geological conditions. The larger diameter of the support steel bar 5 makes the installation of the connecting rod 2 and the elastomer 8 easier.

[0040] Furthermore, a guide cap 11 is provided at the lower end of the supporting steel bar 5 .

[0041] Furthermore, the elastic body 8 is a return spring, and two ends of the return spring are respectively connected to the connecting rod 2 and the supporting steel bar 5.

[0042] The above is only a preferred embodiment of the utility model and does not limit the utility model in any form. According to the technical essence of the utility model, within the spirit and principles of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the utility model.

Claims

1. An expanded diameter steel cage for drilling holes of unequal diameters, characterized in that: The invention comprises a plurality of vertically distributed vertical steel bars (4), wherein the plurality of vertical steel bars (4) are distributed in a circular ring shape, wherein spiral stirrups (9) are movably arranged on the outside of the plurality of vertical steel bars (4) along the length direction thereof, wherein support steel bars (5) parallel to the vertical steel bars (4) are arranged on the inside of the plurality of vertical steel bars (4), wherein a connecting rod (2) is hingedly connected between the support steel bars (5) and the vertical steel bars (4), and an elastic body (8) is fixed between the connecting rod (2) and the support steel bars (5), and in the initial state, the connecting rod ( 2) compressing the elastic body (8) obliquely downward, the diameter of the steel cage formed by the plurality of vertical steel bars (4) is adapted to the size of the upper section (10) of the borehole, after the steel cage enters the upper section (10) of the borehole, the upper section (10) of the borehole constrains the elastic body (8), after the steel cage enters the lower section (1) of the borehole, the diameter of the lower section (1) of the borehole is larger than the diameter of the upper section (10), the constraint on the steel cage is released, the elastic body (8) drives the connecting rod (2) to rotate to a horizontal state, and drives the vertical steel bars (4) to move outward.

2. The expanded diameter steel cage for drilling holes of unequal diameters according to claim 1, characterized in that: The vertical steel bars (4) are welded with limiting collars (3) for allowing the spiral stirrups (9) to pass through. The limiting collars (3) are adapted to the spiral stirrups (9) distributed on the plurality of vertical steel bars (4). The spiral stirrups (9) pass through the limiting collars (3) on each vertical steel bar (4) in a spiral shape along the length direction of the steel cage.

3. The expanded diameter steel cage for drilling holes of unequal diameters according to claim 2, characterized in that: Limit blocks (6) are provided at both ends of the spiral stirrup (9), and a margin is provided between the limit block (6) and the adjacent limit collar (3) to allow the spiral stirrup (9) to move along with the expansion of the steel cage.

4. The expanded diameter steel cage for drilling holes of different diameters according to claim 3, characterized in that: The spiral stirrups (9) are round steel bars with smooth surfaces.

5. The expanded diameter steel cage for drilling holes of unequal diameters according to claim 1, characterized in that: The restraining member (7) is at least one nylon rope or one iron wire.

6. The expanded diameter steel cage for drilling holes of unequal diameters according to claim 5, characterized in that: The restraining members (7) are arranged at intervals along the length direction of the steel cage.

7. The expanded diameter steel cage for drilling holes of unequal diameters according to claim 1, characterized in that: The supporting steel bars (5) are threaded round steel bars, and the diameter of the supporting steel bars (5) is greater than the diameter of the vertical steel bars (4).

8. The expanded diameter steel cage for drilling holes of unequal diameters according to claim 7, characterized in that: A guide cap (11) is provided at the lower end of the supporting steel bar (5).

9. The expanded diameter steel cage for drilling holes of different diameters according to claim 1, characterized in that: The elastic body (8) is a return spring, and the two ends of the return spring are respectively connected to the connecting rod (2) and the supporting steel bar (5).

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