A reinforcing cage for long spiral bored piles
By setting U-shaped bars and guiding devices in the steel cage, the problem of vibratory hammer penetration was solved, ensuring the integrity of the steel cage and its correct lowering, thus improving the quality and bearing capacity of the cast-in-place pile.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AVIC GEOTECHN ENG INST
- Filing Date
- 2025-05-19
- Publication Date
- 2026-06-02
AI Technical Summary
The existing steel reinforcement cage is easily punctured during the vibration of the vibratory hammer, which affects the quality of the pile.
A reinforcement device is adopted, including multiple U-shaped bars and a guide device. The U-shaped bars are fixedly connected to the main bars to form a stable support structure, which resists the bottom of the vibratory hammer and prevents the vibratory hammer from penetrating the bottom of the conical area. The guide device ensures the correct lowering of the steel cage.
This improves the deformation resistance of the reinforcing cage, avoids damage to the bottom of the reinforcing cage by the vibratory hammer, ensures the reinforcing cage is successfully lowered to the design elevation, and improves the overall bearing capacity and project quality of the cast-in-place pile.
Smart Images
Figure CN224314469U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of long spiral pile foundation construction technology in geotechnical engineering, and in particular to a steel cage for long spiral bored cast-in-place piles. Background Technology
[0002] Long spiral drilled cast-in-place piles are a foundation engineering method that involves drilling a hole to the design elevation using a long spiral drill rig, then using a concrete pump to press concrete into the hole from the bottom of the drill bit. After the concrete reaches the design elevation, the steel cage is inserted into the concrete pile body by its own weight or by a special vibration device, thus forming a reinforced concrete cast-in-place pile.
[0003] In current construction projects of long spiral bored piles, the commonly used construction process is the inverted steel cage insertion process. This involves first pumping concrete into the borehole through a pump pipe and drill rod, and then using a vibratory hammer to insert the steel cage inverted into the concrete pile body to form the pile.
[0004] However, existing reinforcing cages typically involve simple welding of multiple main bars at the bottom, with stirrups wrapped around the outside of these bars. This prevents the cage from being lowered into place properly, especially when encountering long piles or concrete with poor workability (workability refers to the ease with which freshly mixed cement concrete can be processed in various stages of construction (mixing, transportation, pouring, compaction, etc.) and achieve uniform quality and dense formation; it includes fluidity, cohesiveness, and water retention. This significantly impacts the quality of the pile.
[0005] Therefore, there is an urgent need for a type of rebar cage that can prevent the vibratory hammer from vibrating through the bottom of the rebar cage during vibration. Utility Model Content
[0006] (a) Technical problems to be solved
[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a steel cage for long spiral bored piles, which solves the technical problem that the bottom of the existing steel cage is easily penetrated by the strong vibration and impact generated during the vibration of the vibratory hammer, thus affecting the quality of the pile.
[0008] (II) Technical Solution
[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:
[0010] This utility model provides a reinforcing cage for long spiral bored piles, comprising multiple main bars arranged in a circumferential array, with the bottoms of the main bars bent inwards to form a vertically connected cylindrical and conical region. It also includes a reinforcing device. The reinforcing device is placed within the cylindrical and conical regions, or only within the conical region. Each reinforcing device includes at least two U-shaped bars, all with their openings vertically facing the opening of the reinforcing cage. All U-shaped bars have the same axis, their bottom centers are intersecting and overlapping, and adjacent U-shaped bars are connected at their bottom centers. The outer walls of all U-shaped bars are fixedly connected to the corresponding main bars, and the number of U-shaped bars does not exceed half the number of main bars. A vibratory hammer is inserted inside the cylindrical region, its bottom penetrating deep into the reinforcing cage and conforming to the inner walls of all U-shaped bars, so that all U-shaped bars resist the bottom of the vibratory hammer to prevent it from penetrating the bottom of the conical region.
[0011] Preferably, it further includes a guiding device; the guiding device is vertically arranged in the conical area, and one end of the guiding device is installed on all the U-shaped bars, and the other end extends vertically downward and passes through the bottom of the conical area to guide the lowering of the steel cage.
[0012] Preferably, the guiding device includes a mounting assembly and a guide rib; the mounting assembly is mounted on all the U-shaped ribs; one end of the guide rib is connected to the bottom of the mounting assembly, and the other end extends downward through the bottom of the conical region, and the bottom of the guide rib is provided with a pointed tip.
[0013] Preferably, the mounting assembly includes a first mounting plate, a second mounting plate, and a connecting assembly; the first mounting plate is located above the second mounting plate, inside all the U-shaped ribs, and the outer wall of the first mounting plate is connected to the inner wall of all the U-shaped ribs; the second mounting plate is located below all the U-shaped ribs, connected to the first mounting plate via the connecting assembly, and the bottom of the second mounting plate is connected to the top of the guide rib.
[0014] Preferably, the connecting assembly includes a plurality of bolts and a plurality of nuts; the plurality of bolts are vertically inserted through the first mounting plate and the second mounting plate, and the plurality of nuts are screwed into the plurality of bolts in a one-to-one correspondence to connect the first mounting plate and the second mounting plate.
[0015] Preferably, the bottom of the second mounting plate is provided with a screw, the top of the guide rib is provided with an internal thread, and the guide rib is screwed to the screw through the internal thread.
[0016] Preferably, both the first mounting plate and the second mounting plate are circular, and the bottom of the first mounting plate is connected to the inner wall of a portion of the U-shaped rib.
[0017] Preferably, it further includes a fixing member; the fixing member is sleeved on the outer wall of the conical region, and the inner wall of the fixing member is connected to the outer wall of the conical region to fix the bottom of the plurality of main ribs; the bottom of the guide rib passes through the bottom of the fixing member.
[0018] Preferably, the fixing member is an inverted frustum shape, and the bottom inner wall of the fixing member is in contact with the outer wall of the guide rib.
[0019] Preferably, the fastener is coaxially arranged with the guide rib.
[0020] (III) Beneficial Effects
[0021] The beneficial effects of this utility model are:
[0022] This invention, by incorporating at least two U-shaped reinforcing bars, forms a stable support structure, improving the deformation resistance of the bottom of the reinforcing cage under the impact of a vibratory hammer. It prevents the bottom of the vibratory hammer from contacting the main reinforcing bars in the conical zone, thus limiting the hammer's downward penetration into the conical zone and preventing the bottom of the hammer from passing through the bottom of the bent main reinforcing bars during vibration. This prevents damage to the bottom of the reinforcing cage during construction, ensuring the integrity of the overall structure and ensuring the cage is successfully lowered to the design elevation. Furthermore, it effectively prevents the cage from being lowered too shallowly or misaligned after the bottom is penetrated by the vibratory hammer, ensuring proper placement within the concrete pile and improving the overall bearing capacity and quality of the cast-in-place pile. The at least two U-shaped reinforcing bars prevent the vibratory hammer from contacting the main reinforcing bars in the conical zone, preventing the hammer from penetrating the bottom of the conical zone and thus avoiding damage to the reinforcing cage. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a reinforcing cage for a long spiral bored pile according to the present invention;
[0024] Figure 2 This is a schematic diagram of the overall three-dimensional structure of a reinforcing device and a guiding device for a steel cage used in a long spiral bored pile according to the present invention.
[0025] Figure 3 This is a schematic diagram of the overall cross-sectional structure of a reinforcing cage for a long spiral bored pile according to the present invention.
[0026] Figure 4This is a schematic diagram of the overall three-dimensional structure of a steel cage for a long spiral bored pile, with multiple U-shaped bars, according to the present invention.
[0027] Figure 5 This is a schematic diagram of the overall three-dimensional structure of a steel cage for a long spiral bored pile, with the U-shaped bars placed in the conical region.
[0028] Figure 6 for Figure 5 A three-dimensional structural diagram showing the disassembly of the two U-shaped ribs;
[0029] Figure 7 This is a schematic diagram of the overall three-dimensional structure of two U-shaped bars in another embodiment of the steel cage for long spiral bored piles according to this utility model.
[0030] Figure 8 This is a schematic cross-sectional view of another embodiment of the reinforcing cage for long spiral bored piles according to this utility model.
[0031] [Explanation of Labels in the Attached Image]
[0032] 1: Main reinforcement; 11: Second vertical section; 12: Bending section; 2: Reinforcing device; 21: U-shaped reinforcement; 211: First vertical section; 212: Arc-shaped section; 213: Positioning groove; 214: Inclined section; 3: Vibratory hammer; 4: Guide device; 41: Mounting assembly; 411: First mounting plate; 412: Second mounting plate; 413: Connecting assembly; 4131: Bolt; 4132: Nut; 414: Threaded rod; 42: Guide rib; 5: Fixing component; 6: Cylindrical area; 7: Conical area. Detailed Implementation
[0033] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.
[0034] Example 1
[0035] This embodiment of a steel cage for a long spiral bored pile includes multiple main bars 1, which are arranged in a circumferential array and whose bottoms are all bent inward to form a cylindrical area 6 and a conical area 7 connected vertically. It also includes a reinforcement device 2.
[0036] Specifically, such as Figure 1As shown, the reinforcement device 2 is placed within the cylindrical area 6 and the conical area 7, or only within the conical area 7. The reinforcement device 2 includes at least two U-shaped ribs 21. The openings of all U-shaped ribs 21 are vertically oriented towards the opening of the reinforcing cage, and the axes of all U-shaped ribs 21 are aligned. The bottom centers of all U-shaped ribs 21 are intersected and overlapped, with adjacent U-shaped ribs 21 connected at their bottom center positions. The outer walls of all U-shaped ribs 21 are fixedly connected to the corresponding main reinforcing bars 1, and the number of U-shaped ribs 21 does not exceed half the number of main reinforcing bars 1 to prevent unstable connections between the U-shaped ribs 21 and the main reinforcing bars 1, thus reducing the stability of the reinforcement device 2. A vibratory hammer 3 is inserted inside the cylindrical area 6. The bottom of the vibratory hammer 3 can penetrate deep into the reinforcing cage and fit against the inner walls of all U-shaped ribs 21, so that all U-shaped ribs 21 resist the bottom of the vibratory hammer 3 to prevent the vibratory hammer 3 from penetrating the bottom of the conical area 7. By setting at least two U-shaped reinforcing bars 21, a stable support structure is formed, which improves the deformation resistance of the bottom of the reinforcing cage when subjected to the vibration impact of the vibratory hammer 3. This prevents the bottom of the vibratory hammer 3 from contacting the main reinforcing bars 1 of the conical zone 7, thus limiting the vibratory hammer 3 from further penetrating the conical zone 7 of the reinforcing cage. It also prevents the bottom of the vibratory hammer 3 from passing through the bottom of the main reinforcing bars 1 that are bent and enclose the conical zone 7 during vibration, thereby preventing damage to the bottom of the reinforcing cage during construction. This ensures the integrity of the overall structure of the reinforcing cage and ensures that the reinforcing cage is successfully lowered to the design elevation. Moreover, it can also effectively avoid the problem of the reinforcing cage being lowered too shallowly or misaligned after the bottom of the reinforcing cage is penetrated by the vibratory hammer 3, ensuring the correct lowering of the reinforcing cage in the concrete pile and improving the overall bearing capacity and engineering quality of the cast-in-place pile.
[0037] Among them, such as Figure 3 and Figure 4 As shown, when the reinforcing device 2 is located within the cylindrical area 6 and the conical area 7, the U-shaped reinforcement 21 includes an arc-shaped segment 212 and two first vertical segments 211. The two ends of the arc-shaped segment 212 are connected to the bottoms of the two first vertical segments 211, and the arc-shaped segment 212 bends towards the bottom of the reinforcing cage. The main reinforcement 1 of the reinforcing cage includes a bent segment 12 and a second vertical segment 11. The top of the bent segment 12 is connected to the bottom of the second vertical segment 11, and the bent segment 12 bends inward. The two first vertical segments 211 are welded to the two oppositely arranged second vertical segments 11 to ensure the position of the U-shaped reinforcement 21 is fixed, preventing the vibratory hammer 3 from penetrating the U-shaped reinforcement 21, thereby preventing the bottom of the vibratory hammer 3 from contacting the bent segment 12 of the conical area 7, and thus preventing the reinforcing cage from being damaged by the vibratory hammer 3. The two adjacent U-shaped ribs 21 in the vertical direction are welded together through their arc-shaped segments 212, that is, the middle parts of the two adjacent arc-shaped segments 212 in the vertical direction are welded together. When the reinforcing device 2 is only located within the conical region 7, such as Figure 5 and Figure 6As shown, the U-shaped rib 21 includes an arc-shaped segment 212 and two inclined segments 214. Both inclined segments 214 slope inwards from top to bottom, and the two ends of the arc-shaped segment 212 are connected to the bottoms of the two inclined segments 214 respectively. The two inclined segments 214 are welded to the two bent segments 12 of the conical region 7 in the main rib 1, so that the bottom of the vibratory hammer 3 penetrates to a lower position, while preventing the bottom of the vibratory hammer 3 from penetrating the main rib 1 of the conical region 7. Preferably, when there are only two U-shaped ribs 21, the two U-shaped ribs 21 are arranged in a cross shape, so that the four outermost points of the bottom of the vibratory hammer 3 can fit against the inner walls of the two U-shaped ribs 21, making the force on the two U-shaped ribs 21 more even when supporting the vibratory hammer 3. Furthermore, preferably, to improve the supporting strength of the reinforcement device 2, U-shaped ribs 21 can be stacked above or below the two U-shaped ribs 21, such as... Figure 4 As shown, the superimposed U-shaped ribs 21 are also connected to the main ribs 1 in the same way as described above. The angle between two adjacent U-shaped ribs 21 is not limited, thereby increasing the strength of the reinforcement device 2 and preventing the bottom of the vibratory hammer 3 from contacting the bent section 12 of the main rib 1 in the conical area 7.
[0038] When the reinforcing device 2 is located within the cylindrical area 6 and the conical area 7, the connection point between the first vertical segment 211 and the arc segment 212 of the U-shaped rib 21 is located 5cm-30cm above the bottom end of the second vertical segment 11 of the main rib 1. This ensures that the outer wall of the first vertical segment 211 of the U-shaped rib 21 can be completely welded to the inner wall of the second vertical segment 11 of the main rib 1, improving the connection strength between the U-shaped rib 21 and the main rib 1, and preventing the U-shaped rib 21 from falling off and being damaged due to excessive vibration impact force from the vibratory hammer 3. When the reinforcing device 2 is only located within the conical area 7, the distance between the lowest point of the arc segment 212 of the U-shaped rib 21 and the bottom end of the bent segment 12 of the main rib 1 is 15cm-25cm to facilitate the welding and installation of the U-shaped rib 21. Moreover, by welding the two first vertical segments 211 of the U-shaped rib 21 to the second vertical segment 11 of the main rib 1 in complete correspondence, or by welding the two oblique segments 214 of the U-shaped rib 21 to the bent segment 12 of the main rib 1 in complete correspondence, the connection strength of the U-shaped rib 21 can be improved, so that the connection of the U-shaped rib 21 is more stable and the U-shaped rib 21 is prevented from falling off during the vibration of the vibratory hammer 3.
[0039] The main reinforcement bars 1 and U-shaped bars 21 of the reinforcing cage are made of the same material and have the same specifications, generally using HRB400 grade steel bars. This ensures that when the vibratory hammer 3 vibrates, the U-shaped bars 21 vibrate due to the vibration of the hammer 3. Because the main reinforcement bars 1 and U-shaped bars 21 are of the same material and specifications, they will vibrate at the same frequency, thus achieving effective compaction. It should be noted that the specifications of the main reinforcement bars 1 are determined according to the on-site construction and construction drawings, and the specific specifications are not limited here. Preferably, the U-shaped bars 21 can be steel bars of the same specifications as the main reinforcement bars 1, but of different lengths, bent and folded together, which facilitates on-site construction and saves construction costs.
[0040] Furthermore, such as Figure 2 and Figure 3 As shown, the reinforcing cage for long spiral bored piles in this embodiment also includes a guide device 4. The guide device 4 is vertically arranged in the conical area 7, with one end of the guide device 4 installed on all the U-shaped bars 21, and the other end extending vertically downward and passing through the bottom of the conical area 7 to guide the lowering of the reinforcing cage. This ensures that the reinforcing cage can be accurately lowered to the predetermined position even in complex construction environments, reducing the tilting or misalignment of the reinforcing cage caused by operational errors, and greatly improving construction accuracy and stability.
[0041] Furthermore, such as Figure 3 As shown, the guiding device 4 includes an installation assembly 41 and a guide rib 42. The installation assembly 41 is installed on all the U-shaped ribs 21, so that the guiding device 4 is tightly connected to the reinforcing device 2 to improve the stability and reliability of the guiding device 4. One end of the guide rib 42 is connected to the bottom of the installation assembly 41, and the other end extends downward through the bottom of the conical area 7. The bottom of the guide rib 42 has a pointed tip, which facilitates the guide rib 42 to penetrate the concrete pile, increases the pressure between the guide rib 42 and the concrete pile, reduces the resistance to lowering the reinforcing cage, and makes it easier and more stable to lower the reinforcing cage into place, simplifying the construction process and improving work efficiency. Moreover, the pointed tip of the guide rib 42 can also more easily penetrate into the soil at the bottom of the concrete pile, thereby fixing the position of the reinforcing cage. The guide rib 42, U-shaped ribs 21 and main reinforcing bars 1 use the same specifications of steel bars, and the specific length is determined according to the needs of the construction site and is not limited here. The pointed tip of the guide rib 42 can be ground with a grinding machine.
[0042] Furthermore, such as Figure 3As shown, the mounting assembly 41 includes a first mounting plate 411, a second mounting plate 412, and a connecting assembly 413. The first mounting plate 411 is located above the second mounting plate 412, inside all the U-shaped ribs 21, and its outer wall is connected to the inner wall of all the U-shaped ribs 21. This not only improves the connection strength between the guide device 4 and the reinforcing device 2, but also, when the vibratory hammer 3 vibrates, it drives the main rib 1, all the U-shaped ribs 21, the first mounting plate 411, the second mounting plate 412, the connecting assembly 413, and the guide rib 42 to vibrate simultaneously, thereby improving the compaction efficiency of the vibratory hammer 3. The second mounting plate 412 is located below all the U-shaped ribs 21, and is connected to the first mounting plate 411 via the connecting assembly 413. The bottom of the second mounting plate 412 is connected to the top of the guide rib 42. By setting the first mounting plate 411, the second mounting plate 412 and the connecting component 413, a stable connection can be achieved, making the overall structure of the guide device 4 more robust and its load-bearing capacity stronger.
[0043] Furthermore, such as Figure 3 As shown, the connecting assembly 413 includes multiple bolts 4131 and multiple nuts 4132. The multiple bolts 4131 are vertically inserted into the first mounting plate 411 and the second mounting plate 412, and the multiple nuts 4132 are screwed one-to-one with the multiple bolts 4131 to connect the first mounting plate 411 and the second mounting plate 412. This improves installation efficiency, and its simple structure enhances versatility.
[0044] Furthermore, such as Figure 2 As shown, the bottom of the second mounting plate 412 is provided with a screw 414, and the top of the guide rib 42 is provided with an internal thread. The guide rib 42 is screwed to the screw 414 through the internal thread, which enables the quick installation and disassembly of the guide rib 42, facilitating on-site assembly and replacement of guide ribs 42 of different lengths or specifications, thereby meeting the construction needs under various geological conditions. Specifically, a threaded hole can be drilled in the top of the guide rib 42 using a rebar drilling machine or impact drill, so that the guide rib 42 can be screwed to the screw 414.
[0045] Furthermore, both the first mounting plate 411 and the second mounting plate 412 are circular. The bottom of the first mounting plate 411 is connected to the inner wall of part of the U-shaped reinforcement 21. The circular shape of the first mounting plate 411 and the second mounting plate 412 can be adapted to the internal space shape of the reinforcing cage and all the U-shaped reinforcement 21, improving applicability. Moreover, when the vibratory hammer 3 vibrates, the first mounting plate 411 and the second mounting plate 412 are subjected to more uniform force, avoiding stress concentration.
[0046] Furthermore, such as Figure 1 , Figures 3-5As shown, the reinforcing cage for long spiral bored piles in this embodiment also includes a fixing member 5. The fixing member 5 is sleeved on the outer wall of the conical region 7, and its inner wall is connected to the outer wall of the conical region 7 to fix the bottom of multiple main reinforcing bars 1. This allows the fixing member 5 to constrain the bent sections 12 of the multiple main reinforcing bars 1, preventing the bent sections 12 from loosening or displacing due to vibration or construction pressure, thus preventing damage to the reinforcing cage and improving the overall rigidity and stability of the bottom structure of the reinforcing cage. Compared to existing stirrup binding, the fixing member 5 has greater strength and stronger constraint force. The bottom of the guide bar 42 passes through the bottom of the fixing member 5 so that the tip of the guide bar 42 can penetrate into the soil when it reaches the bottom of the pile hole, fixing the bottom position of the reinforcing cage and preventing displacement of the reinforcing cage when the vibratory hammer 3 vibrates.
[0047] Furthermore, the fixing member 5 is an inverted frustum shape, which can adapt to the conical region 7 of the reinforcing cage to better weld with the outer wall of the multiple main reinforcing bars 1 in the conical region 7, thereby improving the restraint force and connection strength. The bottom inner wall of the fixing member 5 fits against the outer wall of the guide bar 42, which can better penetrate the concrete pile body. When the reinforcing cage is lowered, the inverted frustum shape of the fixing member 5 can divert the concrete, that is, flow along the outer wall of the fixing member 5, which facilitates the penetration of the reinforcing cage and ensures that the reinforcing cage maintains the correct orientation throughout the lowering process, improving the accuracy and smoothness of the lowering of the reinforcing cage. Preferably, the fixing member 5 is coaxially arranged with the guide bar 42, which can prevent the reinforcing cage from tilting or misaligning during the lowering process, thereby improving the construction accuracy and pile quality.
[0048] Example 2
[0049] like Figure 7 As shown, unlike Embodiment 1, when only two U-shaped ribs 21 are provided, a positioning groove 213 can be provided at the center of the arc-shaped segment 212 of the lower U-shaped rib 21, facing the center of the arc-shaped segment 212 of the upper U-shaped rib 21. The inner wall of the positioning groove 213 can fit with the outer contour of the middle part of the arc-shaped segment 212 of the upper U-shaped rib 21. The two U-shaped ribs 21 are welded through the positioning groove 213. Moreover, the line connecting the midpoints of the two ends of the positioning groove 213 is perpendicular to the line connecting the axes of the two ends of the arc-shaped segment 212 of the upper U-shaped rib 21, so that the two U-shaped ribs 21 are welded perpendicularly, preventing the vibratory hammer 3 from tilting and detaching from the reinforcement device 2 during vibration when it is pressed against the reinforcement device 2. The positioning groove 213 can be opened by a milling machine.
[0050] Example 3
[0051] like Figure 8As shown, when the inner diameter of the reinforcing cage is large, and the inner diameter of the vibratory hammer 3 differs significantly from that of the reinforcing cage, the bottom of the vibratory hammer 3 can also abut against the top of the first mounting plate 411 to limit and constrain the vibratory hammer 3.
[0052] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0055] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A reinforcing cage for long spiral bored piles, comprising a plurality of main bars (1), wherein the plurality of main bars (1) are arranged in a circumferential array and the bottom of each main bar (1) is bent inward to form a cylindrical area (6) and a conical area (7) connected vertically, characterized in that, It also includes reinforcement devices (2); The reinforcing device (2) is placed in the cylindrical area (6) and the conical area (7), or only in the conical area (7). The reinforcing device (2) includes at least two U-shaped bars (21). The openings of all the U-shaped bars (21) are vertically facing the opening of the steel cage, and the axes of all the U-shaped bars (21) are consistent. The bottom centers of all the U-shaped bars (21) are intersected and stacked together, and adjacent U-shaped bars (21) are connected at the bottom center position. The outer walls of all the U-shaped bars (21) are fixedly connected to the corresponding main bars (1), and the number of U-shaped bars (21) does not exceed 1 / 2 of the number of main bars (1). A vibratory hammer (3) is inserted inside the cylindrical area (6). The bottom of the vibratory hammer (3) can penetrate into the steel cage and fit against the inner wall of all the U-shaped bars (21) so that all the U-shaped bars (21) abut against the bottom of the vibratory hammer (3) to prevent the vibratory hammer (3) from penetrating the bottom of the conical area (7).
2. The reinforcing cage for long spiral bored piles as described in claim 1, characterized in that: It also includes a guide device (4); The guide device (4) is vertically arranged in the conical area (7), and one end of the guide device (4) is installed on all the U-shaped bars (21), and the other end extends vertically downward and passes through the bottom of the conical area (7) to guide the lowering of the steel cage.
3. The reinforcing cage for long spiral bored piles as described in claim 2, characterized in that: The guiding device (4) includes a mounting assembly (41) and a guide rib (42); The mounting assembly (41) is mounted on all of the U-shaped ribs (21); One end of the guide rib (42) is connected to the bottom of the mounting assembly (41), and the other end extends downward through the bottom of the conical region (7). The bottom of the guide rib (42) is provided with a pointed tip.
4. The reinforcing cage for long spiral bored piles as described in claim 3, characterized in that: The mounting assembly (41) includes a first mounting plate (411), a second mounting plate (412), and a connecting assembly (413); The first mounting plate (411) is located above the second mounting plate (412), the first mounting plate (411) is located inside all the U-shaped ribs (21), and the outer wall of the first mounting plate (411) is connected to the inner wall of all the U-shaped ribs (21); The second mounting plate (412) is located below all the U-shaped ribs (21), and the second mounting plate (412) is connected to the first mounting plate (411) via the connecting assembly (413). The bottom of the second mounting plate (412) is connected to the top of the guide rib (42).
5. The reinforcing cage for long spiral bored piles as described in claim 4, characterized in that: The connecting assembly (413) includes a plurality of bolts (4131) and a plurality of nuts (4132); Multiple bolts (4131) are vertically inserted through the first mounting plate (411) and the second mounting plate (412), and multiple nuts (4132) are screwed one-to-one with the multiple bolts (4131) to connect the first mounting plate (411) and the second mounting plate (412).
6. The reinforcing cage for long spiral bored piles as described in claim 5, characterized in that: The bottom of the second mounting plate (412) is provided with a screw (414), and the top of the guide rib (42) is provided with an internal thread. The guide rib (42) is screwed to the screw (414) through the internal thread.
7. The reinforcing cage for long spiral bored piles as described in claim 5, characterized in that: Both the first mounting plate (411) and the second mounting plate (412) are circular, and the bottom of the first mounting plate (411) is connected to the inner wall of part of the U-shaped rib (21).
8. The reinforcing cage for long spiral bored piles as described in claim 3, characterized in that: It also includes fasteners (5); The fastener (5) is sleeved on the outer wall of the conical region (7), and the inner wall of the fastener (5) is connected to the outer wall of the conical region (7) to fix the bottom of the multiple main ribs (1); The bottom of the guide rib (42) passes through the bottom of the fastener (5).
9. The reinforcing cage for long spiral bored piles as described in claim 8, characterized in that: The fixing member (5) is an inverted frustum shape, and the bottom inner wall of the fixing member (5) is in contact with the outer wall of the guide rib (42).
10. The reinforcing cage for long spiral bored piles as described in claim 9, characterized in that: The fastener (5) is coaxially arranged with the guide rib (42).