Combined lifting appliance special for lowering deep-hole variable-diameter pile foundation reinforcement cage

Abstract

The utility model provides a special combined lifting appliance for lowering a deep-hole variable-diameter pile foundation reinforcement cage, which comprises a bearing beam arranged on a drilling platform and arranged in a surrounding manner along the circumferential direction of a foundation pit; the clamping piece is arranged on the upper surface of the bearing beam and is used for limiting and fixing a reinforcement cage; the suspension part is provided with a first installation face and a second installation face which are oppositely arranged, the first installation face is provided with a first lifting lug used for being connected with a steel wire rope, the second installation face is provided with a second lifting lug used for being connected with the steel wire rope, and the steel wire rope connected to the first lifting lug is used for being connected with hoisting equipment. A steel wire rope connected to the second lifting lug is used for being connected with the reinforcement cage. In this way, the reinforcement cage is hoisted through the suspension pieces and limited and fixed through the clamping pieces, and pile foundation construction can be more convenient, faster and more efficient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to road and bridge construction technical field especially, it is a kind of deep hole variable-diameter pile foundation reinforcement cage special-purpose combination lifting appliance for lowering. BACKGROUND

[0002] In the construction process of main tower large-diameter pile foundation of suspension bridge, reinforcement cage hoisting is a very key construction procedure of pile foundation construction, and the reinforcement cage hoisting mode directly affects the construction period and construction cost of the whole bridge, and also has a great influence on pile foundation pouring construction, and currently domestic suspension bridge pile foundation construction generally adopts simple pole beam to hoist, and the reinforcement cage lowering and fixing is carried out by the mode of adjusting reinforcement cage elevation by adding reinforcement support leg at bottom, and reinforcement cage is prone to deformation, and rust channel is easily formed by adding reinforcement support leg at bottom, which has long-term influence on pile foundation durability, and the construction period is long, safety risk is high and construction efficiency is low. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model provides a deep hole variable-diameter pile foundation reinforcement cage special-purpose combination lifting appliance, which can make pile foundation construction more convenient and efficient, to at least partially solve the problems in the related art.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] A deep hole variable-diameter pile foundation reinforcement cage special-purpose combination lifting appliance, comprising:

[0006] A cushion beam is arranged on a drilling platform and is arranged around the circumference of a foundation pit;

[0007] A clamping piece is arranged on the upper surface of the cushion beam and is used to limit and fix the reinforcement cage;

[0008] A suspension piece has oppositely arranged first and second mounting surfaces, the first mounting surface is provided with a first lifting lug for connecting a steel wire rope, the second mounting surface is provided with a second lifting lug for connecting a steel wire rope, the steel wire rope connected to the first lifting lug is used to connect with hoisting equipment, and the steel wire rope connected to the second lifting lug is used to connect with the reinforcement cage.

[0009] Further, the clamping piece comprises a base and a limiting plate;

[0010] The base is arranged on the upper surface of the cushion beam and has a passage for the reinforcement cage to pass through, the base is provided with a receiving hole in communication with the passage, and the limiting plate is installed in the receiving hole;

[0011] The limiting plate has a first state and a second state, when the limiting plate is in the first state, part of the limiting plate is located in the channel, when the limiting plate is in the second state, the end of the limiting plate close to the base is located in the receiving hole.

[0012] Further, the number of the receiving holes is multiple, and the multiple receiving holes are arranged along the circumference of the base, and each receiving hole is installed with a corresponding limiting plate.

[0013] Further, the cross section of the limiting plate along the length direction of the limiting plate is a rectangle cross section, and the length of the side close to the second lug or the length of the side close to the first lug is shorter than the length of the other two sides.

[0014] Further, the end of the limiting plate away from the base is provided with a handle.

[0015] Further, the suspension piece includes a ring piece and a support frame, the ring piece has the first mounting surface and the second mounting surface, and the support frame is fixedly connected to the inner wall surface of the ring piece.

[0016] Further, a suspension rod is further included, the ring piece is provided with a connecting portion for connecting the suspension rod, and the end of the suspension rod away from the ring piece is provided with a fixing piece for connecting the reinforcement cage.

[0017] Further, the number of the suspension rods is multiple, and the multiple suspension rods are arranged along the circumference of the suspension piece.

[0018] Further, the number of the first lugs is multiple, and the multiple first lugs are arranged along the circumference of the ring piece.

[0019] Further, the number of the second lugs is multiple, and the multiple second lugs are arranged along the circumference of the ring piece.

[0020] Through the above technical solution, the cushion beam can provide stable basic support for the clamping piece, so that the clamping piece can limit and fix the reinforcement cage, ensure that the position of the reinforcement cage hoisted into the foundation pit does not deviate, provide a good foundation for subsequent concrete pouring, and through the suspension piece hoisting the reinforcement cage, the stress of the reinforcement cage during hoisting is more uniform, ensuring that the reinforcement cage can be vertically lowered to the pre-set position in the foundation pit, that is, through the first lug and the second lug, the weight of the reinforcement cage can be evenly distributed, reducing the risk of deformation of the reinforcement cage due to uneven stress, ensuring the stability of hoisting of the reinforcement cage, while improving the hoisting speed and construction efficiency, achieving the purpose of shortening the construction period. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0022] Figure 1 is a structural diagram of the whole lifting appliance provided in the exemplary embodiment of the present disclosure;

[0023] Figure 2 is a structural diagram of the suspension piece provided in the exemplary embodiment of the present disclosure;

[0024] Figure 3 is a structural diagram of the clamping piece provided in the exemplary embodiment of the present disclosure;

[0025] Figure 4 is a structural diagram of the cushion beam provided in the exemplary embodiment of the present disclosure.

[0026] Legend of reference signs:

[0027] 1, cushion beam; 2, clamping piece; 201, base; 2011, channel; 202, limiting plate; 3, suspension piece; 301, circular ring piece; 302, support frame; 303, connecting part; 4, handle; 5, steel cage; 6, first lifting lug; 7, second lifting lug; 8, steel wire rope. DETAILED DESCRIPTION

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0030] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood by specific circumstances.

[0031] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0032] In the related art, the reinforcement cage is a key component in pile foundation construction, and is usually composed of a frame structure formed by reinforcing steel bars and reinforcing steel bar binding. Its main function is to enhance the compression resistance, tensile resistance and bending resistance of the pile foundation. The hoisting method of the reinforcement cage directly affects its perpendicularity, positional accuracy and quality. During construction, the hoisting of the reinforcement cage must ensure its correct vertical lowering and stability to ensure the quality of subsequent concrete pouring. Any deviation in the hoisting process will affect the bearing capacity and durability of the pile foundation. At present, a simple pole beam hoisting method is commonly used in domestic suspension bridge pile foundation construction. The pole beam hoisting method suspends and lowers the reinforcement cage into the foundation pit by using a crane and steel wire rope. The whole process is relatively simple, but in actual hoisting process, due to the large size and heavy weight of the reinforcement cage, there is uneven stress between the reinforcement cage and the steel wire rope used for hoisting, which may cause bending and deformation of the reinforcement cage during hoisting. Especially when the reinforcement cage is lowered, the deformation of the reinforcement cage will affect its position in the foundation pit, thereby affecting the quality of concrete pouring. Moreover, hoisting the reinforcement cage by using the pole beam method is complicated, requires a large amount of manual labor and time for coordination, and the construction period is often long, which is difficult to operate and has low efficiency.

[0033] Based on this, in the specific embodiments provided in the present disclosure, a combined lifting appliance special for lowering deep hole variable-diameter pile foundation reinforcement cage 5 is provided, which is described with reference to Figures 1 to 4As shown, the deep hole variable-diameter pile foundation reinforcement cage 5 lowering special combined lifting appliance includes: a cushion beam 1, a clamping piece 2 and a suspension piece 3, wherein the cushion beam 1 is arranged on the drilling platform and is arranged along the circumference of the foundation pit; the clamping piece 2 is arranged on the upper surface of the cushion beam 1 and is used to limit and fix the reinforcement cage 5, that is, the position of the reinforcement cage 5 in the foundation pit can be limited by the clamping piece 2, so that the reinforcement cage 5 can be fixed in the foundation pit; the suspension piece 3 has oppositely arranged first and second mounting surfaces, the first mounting surface is provided with a first lifting lug 6 for connecting a steel wire rope 8, the second mounting surface is provided with a second lifting lug 7 for connecting the steel wire rope 8, the steel wire rope 8 connected to the first lifting lug 6 is used to connect with the hoisting equipment, and the steel wire rope 8 connected to the second lifting lug 7 is used to connect with the reinforcement cage 5, that is, through the combined use of the first and second lifting lugs 6 and 7, the balance control of the reinforcement cage 5 during hoisting can be realized, and the problems such as deformation and position deviation of the reinforcement cage 5 caused by improper hoisting can be reduced.

[0034] Through the above technical solution, the cushion beam 1 can provide stable foundation support for the clamping piece 2, so that the clamping piece 2 can limit and fix the reinforcement cage 5, ensure that the position of the reinforcement cage 5 hoisted into the foundation pit does not deviate, provide a good foundation for subsequent concrete pouring, and through the suspension piece 3 hoisting the reinforcement cage 5, the reinforcement cage 5 can be more evenly stressed during hoisting, ensuring that the reinforcement cage 5 can be vertically lowered to the pre-set position in the foundation pit, that is, through the first and second lifting lugs 6 and 7, the weight of the reinforcement cage 5 can be evenly distributed, reducing the risk of deformation of the reinforcement cage 5 due to uneven stress, ensuring the stability of the hoisting of the reinforcement cage 5, while also improving the hoisting speed and construction efficiency, achieving the purpose of shortening the construction period.

[0035] In some embodiments, when the steel reinforcement cage 5 to be hoisted is a segmented steel reinforcement cage 5 (when the overall structure of the steel reinforcement cage 5 is too large, the steel reinforcement cage 5 can be divided into several segments for easy hoisting of the steel reinforcement cage 5), the clamping piece 2 can be used to limit and fix each segment of the steel reinforcement cage 5 to facilitate the installation and fixation of multiple segments of the steel reinforcement cage 5. For ease of understanding, an example of installing and fixing three segments of the steel reinforcement cage 5 is described as follows: the segmented steel reinforcement cage 5 has two segments, namely a first cage segment and a second cage segment. When hoisting the first cage segment, the first cage segment is lowered into the foundation pit until the first cage segment is close to one end of the suspension piece 3 and partially placed outside the foundation pit, and then the first cage segment is limited and fixed by the clamping piece 2. After that, the steel wire rope 8 tied to the first cage segment is released. At this time, the position of the first cage segment remains unchanged under the limiting action of the clamping piece 2. Then, the second cage segment is hoisted by the hoisting equipment so that the second cage segment is above the first cage segment and the first cage segment and the second cage segment are aligned. After alignment, the first cage segment and the second cage segment are fixed. After fixation, the limitation of the clamping piece 2 is cancelled, and then the fixed first cage segment and the second cage segment are further lowered into the foundation pit until they reach the pre-set position. After the fixed first cage segment and the second cage segment are lowered, subsequent concrete pouring operations can be performed.

[0036] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 4 , the clamping piece 2 includes a base 201 and a limiting plate 202. The base 201 is installed on the upper surface of the cushion beam 1, and the base 201 has a passage 2011 for the steel reinforcement cage 5 to pass through. The base 201 is provided with a receiving hole in communication with the passage 2011, and the limiting plate 202 is installed in the receiving hole, so that the limiting plate 202 can extend into the passage 2011 through the receiving hole. Specifically, the limiting plate 202 has a first state and a second state. When the limiting plate 202 is in the first state, part of the limiting plate 202 extends into the passage 2011 through the receiving hole. During the movement of the part of the limiting plate 202 extending into the passage 2011, the part of the limiting plate 202 can pass through the gap between adjacent steel bars of the steel reinforcement cage 5 (the steel reinforcement cage 5 is composed of a plurality of steel bars, and there is a gap between adjacent steel bars), thereby limiting and fixing the steel reinforcement cage 5. When the limiting plate 202 is in the first state, the steel reinforcement cage 5 can be stably limited and fixed at the desired position, facilitating subsequent related work of the construction personnel. When the limiting plate 202 is in the second state, the end of the limiting plate 202 close to the base 201 is located in the receiving hole. At this time, the limiting plate 202 does not limit the steel reinforcement cage 5, and the steel reinforcement cage 5 can be lowered into the foundation pit or perform other related adjustment operations.

[0037] Exemplarily, by switching the first state and the second state of the limiting plate 202, the construction personnel can achieve accurate positioning and dynamic adjustment during the hoisting process of the reinforcement cage 5, effectively prevent the reinforcement cage 5 from deforming, position deviation and other problems, reduce the time and risk of manual operation, and improve the construction efficiency.

[0038] In some embodiments, with reference to Figure 1 and Figure 3 As shown, the number of accommodation holes is multiple, the multiple accommodation holes are arranged along the circumference of the base 201, and each accommodation hole is installed with a corresponding limiting plate 202. The multiple limiting plates 202 can provide more stable support for the reinforcement cage 5, effectively avoid safety hazards such as falling and tilting of the reinforcement cage 5 due to improper position or uneven force, make the reinforcement cage 5 more stable during hoisting, avoid possible safety accidents, and thus improve the safety of the construction site.

[0039] Exemplarily, the base 201 is provided with multiple accommodation holes, and each accommodation hole is installed with a corresponding limiting plate 202, which can make the limiting plate 202 have more flexibility, that is, it can adapt to different construction needs and pile foundation environments. For example, in special environments such as deep hole, variable diameter pile foundation, etc., the construction personnel can adjust the number and position of the limiting plate 202 in the accommodation hole according to the actual situation, so as to better adapt to various complex situations. This flexibility provides greater adaptability and operability for different types of pile foundation construction.

[0040] In some embodiments, in order to make the limiting plate 202 be able to bear more pressure from the reinforcement cage 5, the limiting plate 202 installed in the accommodation hole should be vertically arranged, that is, the cross section of the limiting plate 202 along the length direction of the limiting plate 202 is a rectangle or the like, and the length of the side of the rectangle or the like close to the second lifting lug 7 or the length of the side of the rectangle or the like close to the first lifting lug 6 is the shortest compared with the lengths of the other two sides. The vertical arrangement of the limiting plate 202 can make the limiting plate 202 more smoothly and conveniently inserted into the gap of the reinforcement cage 5, so as to limit and fix the reinforcement cage 5. At the same time, when the reinforcement cage 5 is limited by multiple limiting plates 202, the weight of the reinforcement cage 5 is vertically fed downward to the limiting plate 202. At this time, the vertically arranged limiting plate 202 has better bearing capacity than the horizontally arranged limiting plate 202, which ensures that the limiting plate 202 will not be bent and deformed when it is subjected to the gravity of the reinforcement cage 5. At the same time, the cost of maintenance and replacement is reduced, and the construction safety is improved.

[0041] In some embodiments, with reference to Figure 1 and Figure 3As shown, in order to facilitate the limit plate 202 to be more flexible and convenient to repeatedly switch between the first state and the second state, a handle 4 can be arranged at one end of the limit plate 202 away from the base 201, and the construction personnel can pull or push the limit plate 202 by holding the handle 4, so that the limit plate 202 can be flexibly switched between the first state and the second state.

[0042] In some embodiments, with reference to Figure 1 and Figure 2 As shown, the suspension piece 3 includes a circular ring piece 301 and a support frame 302, wherein the circular ring piece 301 has a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface are respectively provided with a first lifting lug 6 and a second lifting lug 7, and the support frame 302 is fixedly connected to the inner wall surface of the circular ring piece 301, and the support frame 302 is used to improve the overall strength of the circular ring piece 301, so as to ensure that the circular ring piece 301 can withstand a larger load during hoisting, and avoid deformation or damage of the circular ring piece 301 due to excessive force.

[0043] In some embodiments, with reference to Figure 1 and Figure 2 As shown, the number of the first lifting lug 6 and the second lifting lug 7 is multiple, the multiple first lifting lugs 6 are arranged along the circumference of the circular ring piece 301, and the multiple second lifting lugs 7 are arranged along the circumference of the circular ring piece 301, wherein the first lifting lug 6 can be connected with the hoisting equipment (such as a crane or a hoist) through the steel wire rope 8, and the multiple first lifting lugs 6 arranged along the circumference of the circular ring piece 301 can provide multiple stress points for the suspension piece 3, so that the reinforcement cage 5 is more stable during hoisting, and safe hoisting is ensured; the second lifting lug 7 is connected with the reinforcement cage 5 through the steel wire rope 8, and the multiple second lifting lugs 7 are arranged along the circumference of the circular ring piece 301, which prevents the reinforcement cage 5 from tilting or position deviation due to uneven force.

[0044] For example, the uniform spacing between the multiple second lifting lugs 7 can ensure that the force distribution of the reinforcement cage 5 is more uniform, thereby improving the stability and safety of the entire hoisting system.

[0045] In some embodiments, with reference to Figure 2As shown, in order to ensure that the reinforcement cage 5 can be stably placed in the foundation pit in the subsequent concrete pouring operation, a suspension rod can be installed on the circular ring 301, the reinforcement cage 5 and the circular ring 301 are connected through the suspension rod, the circular ring 301 is provided with a connecting portion 303 for connecting the suspension rod, and one end of the suspension rod away from the circular ring 301 is provided with a fixing piece for connecting the reinforcement cage 5, that is, when the concrete pouring operation is performed, if the steel wire rope 8 is selected to suspend the reinforcement cage 5 for pouring, the reinforcement cage 5 will shake within a certain range, which may further cause poor pouring effect. Therefore, before the concrete pouring operation is performed, the suspension rod is installed between the reinforcement cage 5 and the circular ring 301, which can reduce the shaking range of the reinforcement cage 5 as much as possible and effectively improve the accuracy and uniformity of the concrete pouring.

[0046] Exemplarily, the suspension rod is configured as a solid metal rod, wherein the steel bars used to constitute the reinforcement cage 5 are provided with a first external thread at one end close to the circular ring 301, the suspension rod is provided with a second external thread corresponding to the first external thread, the fixing piece on the suspension rod is configured as a double-thread steel bar joint, the suspension rod and the steel bar with the first external thread are connected through the double-thread steel bar joint, one end of the suspension rod away from the second external thread is provided with a third external thread, and the connecting portion 303 provided on the circular ring 301 is configured as a threaded hole corresponding to the third external thread. It should be noted that the threaded hole can be provided with the suspension rod, and therefore the diameter of the part of the suspension rod with the third external thread is greater than the diameter of other parts of the suspension rod.

[0047] Exemplarily, the suspension rod is configured as a solid metal rod, wherein the steel bars used to constitute the reinforcement cage 5 are provided with a first external thread at one end close to the circular ring 301, the suspension rod is provided with a second external thread corresponding to the first external thread, the fixing piece on the suspension rod is configured as a double-thread steel bar joint, the suspension rod and the steel bar with the first external thread are connected through the double-thread steel bar joint, one end of the suspension rod away from the second external thread is provided with a connecting lug, and the connecting portion 303 provided on the circular ring 301 is configured as an embedded groove for receiving the connecting lug, and a through hole is provided at the center of the embedded groove for the suspension rod to pass through. In order to ensure that the connecting lug and the circular ring 301 have a firm connection relationship, a plurality of threaded holes can be provided around the outside of the through hole. The connecting lug is provided with a hole for the screw rod to pass through, and the screw rod can be screwed with the threaded hole on the circular ring 301 after passing through the hole on the connecting lug, thereby completing the fixation between the connecting lug and the circular ring 301.

[0048] In some embodiments, in order to ensure that the circular ring 301 and the reinforcement cage 5 can be firmly connected, the number of suspension rods is multiple, the multiple suspension rods are arranged at intervals along the circumference of the suspension member 3, and the number of steel bars with the first external thread on the reinforcement cage 5 is the same as the number of suspension rods.

[0049] The installation of the suspension rod is explained as follows: before the concrete pouring operation, in order to ensure the stability of the reinforcement cage 5, a plurality of suspension rods are installed in sequence, and the installation of one suspension rod is taken as an example for explanation. The reinforcement cage 5 is fixed by the limiting plate 202, so that the end of the reinforcement cage 5 close to the ring member 301 is located outside the foundation pit, and then the suspension rod is installed. One end of the suspension rod is connected to the connecting portion 303 of the ring member 301, and the other end of the suspension rod is provided with a fixing member for connecting the reinforcement cage 5.

[0050] After the plurality of suspension rods are all connected, the steel wire rope 8 connected between the reinforcement cage 5 and the ring member 301 is removed, and the limiting plate 202 limiting the reinforcement cage 5 is switched to the second state from the first state. After the limiting of the reinforcement cage 5 by the limiting plate 202 is cancelled, the construction personnel controls the hoisting equipment to continue to lower the reinforcement cage 5 into the foundation pit. After the reinforcement cage 5 is completely placed in the foundation pit, the limiting plate 202 in the second state is switched to the first state. With the continuous lowering of the reinforcement cage 5, the distance between the suspension member 3 and the limiting plate 202 is continuously reduced, until the suspension member 3 and the limiting plate 202 are in contact with each other. At this time, the limiting plate 202 limits the suspension member 3. Then, the steel wire rope 8 connected between the suspension member 3 and the hoisting equipment is removed. After the steel wire rope 8 is completely removed, the concrete pouring operation can be started.

[0051] For example, before the suspension rod is installed, by selecting suspension rods of different lengths, the height of the reinforcement cage 5 during the lowering process can be accurately controlled, so as to achieve the required distance between the reinforcement cage 5 and the pit opening. That is, according to the specific construction requirements, the length of the suspension rod is adjusted, so that the reinforcement cage 5 can maintain the required safety distance and accurate position from the pit opening after the lowering is completed.

[0052] At the same time, according to the depth of the foundation pit and the design requirements, the different lengths of the suspension rod can ensure that the reinforcement cage 5 always maintains a safety distance from the pit opening after the lowering is completed, so as to avoid the reinforcement cage 5 from contacting the pit opening or being lowered too deeply, and prevent operation errors or accidents caused by improper position.

[0053] It should be understood by those skilled in the art that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure (including the claims) is limited to these examples; the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above. In order to be brief, they are not provided in detail.

[0054] Embodiments of the present application are intended to encompass all such alternatives, modifications and variations falling within the broad scope of the appended claims. Accordingly, any omission, modification, substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A special combined lifting device for deep hole variable diameter pile foundation reinforcement cage lowering, characterized in that , comprising: a cushion beam (1) arranged on a drilling platform and circumferentially around a foundation pit; a clamping piece (2) arranged on the upper surface of the cushion beam (1) and used to limit and fix a steel reinforcement cage (5); a suspension piece (3) having oppositely arranged first and second mounting surfaces, the first mounting surface being provided with a first lifting lug (6) for connecting a steel wire rope (8), and the second mounting surface being provided with a second lifting lug (7) for connecting the steel wire rope (8), the steel wire rope (8) connected to the first lifting lug (6) being used to connect with hoisting equipment, and the steel wire rope (8) connected to the second lifting lug (7) being used to connect with the steel reinforcement cage (5).

2. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 1, characterized in that: The clamping piece (2) comprises a base (201) and a limiting plate (202); the base (201) is arranged on the upper surface of the cushion beam (1) and has a passage (2011) for the steel reinforcement cage (5) to pass through, the base (201) is provided with a receiving hole in communication with the passage (2011), and the limiting plate (202) is mounted in the receiving hole; the limiting plate (202) has a first state and a second state, when the limiting plate (202) is in the first state, part of the limiting plate (202) is located in the passage (2011), and when the limiting plate (202) is in the second state, one end of the limiting plate (202) close to the base (201) is located in the receiving hole.

3. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 2, characterized in that: The number of the receiving holes is multiple, and the multiple receiving holes are arranged at intervals along the circumference of the base (201), and each receiving hole is mounted with a corresponding limiting plate (202).

4. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 2, characterized in that: The cross section of the limiting plate (202) along the length direction thereof is a rectangular cross section, and the length of the side of the rectangular cross section close to the second lifting lug (7) or the length of the side of the rectangular cross section close to the first lifting lug (6) is shorter than the lengths of the other two sides.

5. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 2, characterized in that: One end of the limiting plate (202) away from the base (201) is provided with a handle (4).

6. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 1, characterized in that: The suspension piece (3) comprises a circular ring piece (301) and a support frame (302), the circular ring piece (301) has the first and second mounting surfaces, and the support frame (302) is fixedly connected to the inner wall surface of the circular ring piece (301).

7. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 6, characterized in that: Further comprising a suspension rod, the circular ring piece (301) is provided with a connecting portion (303) for connecting the suspension rod, and one end of the suspension rod away from the circular ring piece (301) is provided with a fixing piece for connecting the steel reinforcement cage (5).

8. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 7, characterized in that: The number of the suspension rods is multiple, and the multiple suspension rods are arranged at intervals along the circumference of the suspension piece (3).

9. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 6, characterized in that: The number of the first lifting lugs (6) is multiple, and the multiple first lifting lugs (6) are arranged at intervals along the circumference of the circular ring piece (301).

10. The combined lifting device for deep hole variable diameter pile reinforcement cage lowering according to claim 6, characterized in that: The number of the second lifting lugs (7) is multiple, and the multiple second lifting lugs (7) are arranged at intervals along the circumference of the circular ring piece (301).

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