A lifting method, auxiliary lifting device and retaining pile

Abstract

The present application provides a lifting method, an auxiliary lifting device and a retaining pile, wherein the lifting method comprises installing two auxiliary lifting devices eccentrically and symmetrically at the two ends of the retaining pile; connecting a sling assembly to the auxiliary lifting device; the sling assembly rises, and the retaining pile deflects under the action of its own gravity, so that the vertical lifting part on the retaining pile is exposed; the hook assembly is installed on the vertical lifting part, and the sling assembly cooperates with the hook assembly to make the retaining pile deflect to an upright state under the action of its own gravity. The auxiliary lifting device, retaining pile and lifting method provided by the present application realize vertical lifting of the retaining pile, avoid the problem of tilting of the retaining pile during lifting, ensure the construction accuracy during pile sinking, and improve the construction efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of foundation pit retaining, and in particular to a hoisting method, an auxiliary hoisting device and retaining piles. Background Art

[0002] Underground continuous walls are used to support foundation pits and have waterproofing functions. Currently, they are mostly made using the SMW method or the TRD method, and are less commonly made in prefabrication form.

[0003] The underground continuous wall is made in a prefabricated form, which is generally assembled from multiple prefabricated retaining piles. The length of a single retaining pile generally ranges from a few meters to more than ten meters. After being formed, the retaining piles generally need to be stacked horizontally in the storage area. When sinking the piles, lifting equipment is required to move the retaining piles from the storage position to the sinking position for the pile driver to carry out the pile sinking operation. However, the existing retaining piles generally need to be lifted to an upright state by a lifting structure first, and then moved horizontally to the sinking position. However, the horizontally placed retaining piles lack vertical lifting components at the ends, which makes it difficult to connect to the lifting structure. Usually, a sling is used to cover the pile body of the retaining pile. Such lifting will cause the retaining pile to be in a tilted state after being lifted, and the tilted pile body is not easy to straighten when sinking the piles. If the piles are directly tilted, it will cause serious construction quality problems and bring great difficulty to the construction. Summary of the invention

[0004] The purpose of the present application is to provide a lifting method, an auxiliary lifting device and a retaining pile to solve the problem of difficulty in vertical lifting in the above-mentioned prior art.

[0005] The first aspect of the present application provides a hoisting method, which comprises the following steps:

[0006] S1: Install two auxiliary hangers eccentrically and symmetrically at the two ends of the retaining pile;

[0007] S2: Connect the sling assembly to the auxiliary sling;

[0008] S3: The sling assembly rises, and the retaining pile deflects under the action of its own gravity, so that the vertical lifting part on the retaining pile is exposed;

[0009] S4: Install the hook assembly on the vertical lifting part, and the sling assembly cooperates with the hook assembly to make the retaining pile deflect to an upright state under the action of its own gravity.

[0010] In a possible implementation, step S4 specifically includes the following steps:

[0011] S4a: installing the hook assembly on the vertical lifting part, controlling the sling assembly and the hook assembly to pull the retaining pile up to a preset height, and translate it to a pile sinking position;

[0012] S4b: Control the sling assembly to descend so that the retaining pile is deflected from a horizontal state to a vertical state under the action of its own gravity with the portion of the hook assembly cooperating with the vertical lifting part as the axis, so as to facilitate the sinking of the retaining pile in the vertical state.

[0013] The second aspect of the present application provides an auxiliary lifting device, which is used in the lifting method provided in the first aspect of the present application, comprising:

[0014] A base, wherein a retaining pile docking portion is provided on the base, and the base can be installed at an end of the retaining pile in the length direction through the retaining pile docking portion;

[0015] A lifting connection portion is fixed to the base and is used to connect a sling assembly.

[0016] In a possible implementation, the retaining pile docking portion includes a connecting hole.

[0017] In a possible implementation, the base and the lifting connection portion are fixedly connected via a connecting rod.

[0018] In a possible implementation, a reinforcing rib is fixedly provided on the connecting rod, and the reinforcing rib is fixed to the base and / or the reinforcing rib is fixed to the lifting connection part.

[0019] In a possible implementation, the lifting connection portion is provided with a mounting hole for connecting the sling assembly.

[0020] The third aspect of the present application also provides a retaining pile, wherein the auxiliary lifting device provided by the second aspect of the present application is used for lifting and translation, and the retaining pile is provided with a vertical lifting part for cooperating with a hook assembly in the thickness direction, and the position of the vertical lifting part is close to one end of the retaining pile in the length direction, and in the length direction parallel to the retaining pile, the axis of the vertical lifting part is coplanar with the center of gravity of the retaining pile.

[0021] In a possible implementation, the guardrail pile is provided with a plurality of fixing holes on both end faces in the length direction, and at least a portion of the fixing holes correspond one-to-one with the connecting holes on the base, and the auxiliary sling is fastened and installed on the two end faces of the guardrail pile by fasteners penetrating the connecting holes and connecting with the fixing holes.

[0022] In a possible implementation, the retaining pile is provided with two hollow holes in the length direction, and the auxiliary sling is installed at both ends of any one of the hollow holes.

[0023] The technical solution provided by this application can achieve the following beneficial effects:

[0024] The auxiliary lifting equipment, retaining piles and lifting method provided in the present application realize vertical lifting of the retaining piles, avoid the problem of tilting of the retaining piles during lifting, ensure the construction accuracy during pile sinking, and improve the construction efficiency.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flowchart of a hoisting method provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of the auxiliary lifting device provided in the embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of the retaining pile provided in the embodiment of the present application;

[0029] Figure 4 A state diagram of the coordination between the auxiliary spreader and the retaining pile provided in the embodiment of the present application;

[0030] Figure 5 This is the main view of the retaining pile before flipping;

[0031] Figure 6 This is the main view of the retaining pile after flipping;

[0032] Figure 7 It is the state diagram when the retaining pile is translated by the sling assembly;

[0033] Figure 8 The state diagram is when the retaining pile is adjusted from a horizontal state to a vertical state through the cooperation of the sling assembly and the hook assembly;

[0034] Fig. 9 This is a state diagram of the retaining piles during pile sinking.

[0035] Reference numerals:

[0036] 1- Auxiliary lifting device;

[0037] 11- base;

[0038] 111-connection hole;

[0039] 12- lifting connection;

[0040] 121-mounting hole;

[0041] 13-connecting rod;

[0042] 14-Reinforcement ribs;

[0043] 2- retaining piles;

[0044] 21- vertical lifting part;

[0045] 22-hollow hole;

[0046] 23-fixing hole;

[0047] 3- sling assembly;

[0048] 4-Hook assembly.

[0049] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0053] After forming, the retaining piles generally need to be stacked horizontally in the storage area. Before sinking the piles, one method is to use a lifting structure to erect the retaining piles, and then move them to the pile sinking position for sinking. However, the retaining piles placed horizontally in the storage area are not convenient to connect with the lifting structure. In the prior art, a sling is usually used to wrap around a certain position on the pile body of the retaining pile, but such lifting often causes the retaining piles to tilt, making it difficult to ensure the smooth movement of the retaining piles, and the tilted retaining piles are not easy to straighten, which brings great difficulty to the pile sinking construction.

[0054] In addition, before sinking the pile, another method is to lift the retaining pile through an external mechanism and move it horizontally to the pile sinking position, then place the retaining pile horizontally on the ground, and then erect the retaining pile at the pile sinking position through the lifting structure to sink the pile. However, this method requires lifting, translating, and re-lifting the retaining pile, which increases the difficulty of construction, increases the risk of damage to the retaining pile during the movement, and reduces efficiency.

[0055] For this reason, Figure 1 As shown, the embodiment of the present application provides a hoisting method, which includes the following steps:

[0056] Step S1, two auxiliary hangers 1 are eccentrically and symmetrically installed at two ends of the retaining pile 2.

[0057] The center of gravity of the auxiliary lifting device 1 is deviated from that of the retaining pile 2, so that the retaining pile 2 can be flipped during the process of pulling the auxiliary lifting device 1 for lifting, so that the axis of the vertical lifting part 21 on the retaining pile 2 is adjusted from a direction perpendicular to the ground to a direction parallel to the ground, so as to facilitate connection with the hook assembly 4.

[0058] Step S2: connecting the sling assembly 3 to the auxiliary sling 1.

[0059] Step S3, the sling assembly 3 rises, and the retaining pile 2 deflects under the action of its own gravity, so that the vertical lifting part 21 on the retaining pile 2 is exposed.

[0060] In this embodiment, the guardrail pile 2 is placed horizontally in the storage area. When the sling assembly 3 rises, the guardrail pile 2 can be flipped 90° by the sling assembly 3, so that the axis of the vertical lifting part 21 on the guardrail pile 2 is adjusted from a direction perpendicular to the ground to a direction parallel to the ground, thereby making the vertical lifting part 21 on the guardrail pile 2 exposed.

[0061] Step S4, installing the hook assembly 4 on the vertical lifting part 21, the sling assembly 3 cooperates with the hook assembly 4 to make the retaining pile 2 deflect to the upright state under the action of its own gravity, so as to facilitate the sinking of the retaining pile 2 in the upright state.

[0062] It should be noted that when the retaining pile 2 is moved horizontally to the pile sinking position, the hook assembly 4 applies tension to the vertical lifting part 21 on the retaining pile 2 to ensure that the retaining pile 2 is positioned at the current height. At the same time, the sling assembly 3 is controlled to gradually move downward. Since the vertical lifting part 21 is close to one end of the retaining pile 2 in the length direction, that is, the vertical lifting part 21 deviates from the center of gravity of the retaining pile 2, the retaining pile 2 can be rotated around the matching position of the hook assembly 4 and the vertical lifting part 21, so that the retaining pile 2 is rotated from a horizontal state to a vertical state.

[0063] When the retaining pile 2 is adjusted to the vertical state, the connection between the sling assembly 3 and the auxiliary sling 1 can be released, and then the auxiliary sling 1 at the bottom of the retaining pile 2 can be removed. At this time, the retaining pile 2 can maintain the vertical state before the pile is sunk by the cooperation of the hook assembly 4 and the vertical lifting part 21, and further realize the pile sinking by the pulling of the hook assembly 4. After the retaining pile is sunk, the auxiliary sling 1 on the top of it is removed, so that the retaining pile can be spliced ​​with other retaining piles in the length direction.

[0064] Therefore, the lifting method provided in the embodiment of the present application can make the retaining pile 2 flip 90° before leaving the ground to expose the vertical lifting part 21 on the retaining pile 2, thereby facilitating the connection between the retaining pile 2 and the hook assembly 4. In addition, the retaining pile 2 can be translated and adjusted in posture in the air without the need for secondary lifting, thereby improving construction efficiency.

[0065] In addition, it should be noted that the retaining pile 2 is prone to deflection or rotation when moving in an upright state, and it is difficult to ensure that the retaining pile 2 is accurately aligned with the ground pile position when sinking the pile. To this end, in this embodiment, step S4 may specifically include the following steps:

[0066] S4a, install the hook assembly 4 on the vertical lifting part 21, control the sling assembly 3 and the hook assembly 4 to pull the retaining pile 2 up to a preset height, and translate it to the pile sinking position.

[0067] By making the retaining pile 2 first move horizontally to the pile sinking position under the cooperation of the sling assembly 3 and the hook assembly 4, the stability of the movement of the retaining pile 2 can be ensured, and the retaining pile 2 can be prevented from deflecting or spinning during movement.

[0068] S4b, control the sling assembly 3 to descend, so that the retaining pile 2 is deflected from the horizontal state to the vertical state under the action of its own gravity with the part of the hook assembly 4 cooperating with the vertical lifting part 21 as the axis, so as to facilitate the sinking of the retaining pile 2 in the vertical state.

[0069] like Figures 2 to 9 As shown, the embodiment of the present application also provides an auxiliary sling 1 and a guardrail pile 2, wherein the auxiliary sling 1 includes a base 11 and a lifting connection portion 12, wherein a guardrail pile docking portion is provided on the base 11, and the base 11 is installed at the end of the guardrail pile 2 in the length direction through the guardrail pile docking portion, and the position of the base 11 can be close to one end of the guardrail pile 2 in the width direction, and the lifting connection portion 12 is fixed to the base 11 for connecting the sling assembly 3.

[0070] The retaining pile 2 is provided with a vertical lifting part 21 in the thickness direction for cooperating with the hook assembly 4. The vertical lifting part 21 is positioned close to one end of the retaining pile 2 in the length direction, and in the length direction parallel to the retaining pile 2, the axis of the vertical lifting part 21 is coplanar with the center of gravity of the retaining pile 2.

[0071] It should be noted that when the guardrail pile 2 is placed horizontally in the storage area, the axis of the vertical lifting part 21 is perpendicular to the ground, which makes it difficult for the external hook assembly 4 to pass through the vertical lifting part 21 and cannot be lifted. To this end, the base 11 of the auxiliary sling 1 can be symmetrically fixed to the two ends of the guardrail pile 2 in the length direction, and close to one end of the guardrail pile 2 in the width direction, that is, the position of the auxiliary sling 1 deviates from the center of gravity of the guardrail pile 2. Therefore, when the sling assembly 3 pulls the auxiliary sling 1 upward, the end of the guardrail pile 2 away from the auxiliary sling 1 in the width direction keeps in contact with the ground, so that the guardrail pile 2 can be flipped. When the guardrail pile 2 rotates through 90°, the axis of the vertical lifting part 21 can be adjusted from a direction perpendicular to the ground to a direction parallel to the ground, so that the hook assembly 4 can be easily passed through the vertical lifting part 21.

[0072] Then, the sling assembly 3 drives the retaining pile 2 to continue to rise to a certain height, so as to horizontally move the retaining pile 2 to the pile sinking position to avoid rotation. Figure 7 The height of the rising of the guard pile 2 can be equal to or slightly greater than the length of the guard pile 2 to ensure that the guard pile 2 can be smoothly adjusted from a horizontal state to an upright state.

[0073] When the retaining pile 2 is moved horizontally to the pile sinking position, the hook assembly 4 applies tension to the vertical lifting part 21 on the retaining pile 2 to ensure that the retaining pile 2 is positioned at the current height. At the same time, the sling assembly 3 is controlled to gradually move downward. Since the vertical lifting part 21 is close to one end of the retaining pile 2 in the length direction, that is, the vertical lifting part 21 deviates from the center of gravity of the retaining pile 2, the retaining pile 2 can be rotated around the matching position of the hook assembly 4 and the vertical lifting part 21, so that the retaining pile 2 is rotated from a horizontal state to a vertical state, as shown in FIG. Figure 8 and Fig. 9 As shown. Since the axis of the vertical lifting part 21 is coplanar with the center of gravity of the retaining pile 2 in the length direction parallel to the retaining pile 2, the retaining pile 2 is ensured to remain stable in the erected state, avoiding the retaining pile 2 from tilting, and ensuring the accurate alignment of the retaining pile 2 with the pile sinking position.

[0074] When the retaining pile 2 is adjusted to the vertical state, the connection between the sling assembly 3 and the auxiliary sling 1 can be released, and then the auxiliary sling 1 at the bottom of the retaining pile can be removed. At this time, the retaining pile 2 can maintain the vertical state before pile sinking through the cooperation of the hook assembly 4 and the vertical lifting part 21, and further realize pile sinking through the pulling of the hook assembly 4. In this embodiment, the vertical lifting part 21 can be a through hole that penetrates the retaining pile 2 in the thickness direction, or it can also be a bolt locking member that penetrates the retaining pile 2 in the thickness direction and protrudes on both sides of the pile body 2 in the thickness direction.

[0075] Therefore, the auxiliary lifting device 1 and the retaining pile 2 provided in the embodiment of the present application can make the retaining pile 2 flip 90° before leaving the ground, thereby facilitating the connection between the retaining pile 2 and the hook assembly 4. In addition, the retaining pile 2 can be translated and adjusted in posture in the air without the need for secondary lifting, thereby improving construction efficiency.

[0076] The auxiliary sling 1 may be integrally formed of a base 11 and a lifting connection portion 12 , and the lifting connection portion 12 may be used to fix the sling assembly 3 , so as to facilitate the disassembly and assembly of the sling assembly 3 .

[0077] Specifically, the butt joint of the retaining pile includes a connection hole 111 , and the connection hole 111 can be used to pass connecting parts such as bolts to facilitate the assembly and disassembly of the base 11 and the retaining pile 2 .

[0078] Furthermore, the base 11 and the lifting connection part 12 can be fixedly connected via a connecting rod 13, and the connecting rod 13 can maintain a certain distance between the lifting connection part 12 and the base 11, so as to facilitate the connection between the lifting connection part 12 and the sling assembly 3.

[0079] Furthermore, a reinforcing rib 14 is fixedly provided on the connecting rod 13, and the reinforcing rib 14 is fixed to the base 11, or the reinforcing rib 14 is fixed to the lifting connection part 12, or the reinforcing rib 14 is fixed to both the base 11 and the lifting connection part 12. The reinforcing rib 14 may be multiple and may be evenly distributed in the circumferential direction of the connecting rod 13 to improve the structural strength of the auxiliary sling 1.

[0080] It is understandable that, in order to facilitate the connection between the lifting connection part 12 and the sling assembly 3, a mounting hole 121 may be provided on the lifting connection part 12, and the mounting hole 121 may cooperate with a connecting member such as a bolt to achieve rapid disassembly and assembly of the auxiliary sling 1 and the sling assembly 3. In this embodiment, the lifting connection part 12 may be a flange.

[0081] Specifically, the retaining pile 2 provided in the embodiment of the present application may be provided with a plurality of fixing holes 23 on both end faces in the length direction, and at least a portion of the fixing holes 23 correspond to the connection holes 111 on the base 11, and the auxiliary sling 1 is fastened and installed on the two end faces of the retaining pile 2 by fasteners penetrating the connection holes 111 and connecting with the fixing holes 23. On the one hand, the fixing holes 23 can realize the connection of the two retaining piles 2 in the length direction, and on the other hand, the auxiliary sling 1 can be fixedly connected through the connection holes 111 on the base 11, the fixing holes 23 on the retaining pile 2, and the connection parts such as bolts.

[0082] In addition, after the auxiliary lifting device 1 is removed, the fixing holes 23 on the guardrail piles 2 can also be used to install mechanical connectors (not shown in the figure) to connect and fix two adjacent guardrail piles 2 in the length direction of the guardrail piles 2.

[0083] In addition, in this embodiment, the retaining pile 2 is provided with two hollow holes 22 in the length direction, and the auxiliary lifting device 1 is installed at both ends of any one of the hollow holes 22. The hollow hole 22 can reduce the use of materials and reduce costs while ensuring the structural strength of the retaining pile 2. In addition, the hollow hole 22 can also be used to pour slurry to reinforce the connection strength of the two retaining piles 2 in the length direction through the slurry. The hollow hole 22 also provides a positioning reference for the installation of the auxiliary lifting device 1, ensuring that the auxiliary lifting devices 1 at both ends of the hollow hole 22 are symmetrical with each other, so as to ensure the balance of the retaining pile 2 during lifting.

[0084] Of course, there may be more than two hollow holes 22. In the width direction of the retaining pile 2, more than two hollow holes 22 may be provided on the premise that the strength requirement of the retaining pile 2 is met. However, it needs to be satisfied that, after the auxiliary sling 1 is installed, the center of gravity of the retaining pile is biased toward one side of the central axis of the auxiliary sling 1 in the horizontal direction.

[0085] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hoisting method, characterized in that: The steps include: S1: installing two auxiliary lifting devices (1) eccentrically and symmetrically at two ends of the retaining pile (2) in the length direction and close to one end of the retaining pile (2) in the width direction; S2: Connecting the sling assembly (3) to the auxiliary sling (1); S3: the sling assembly (3) rises, and the retaining pile (2) deflects under the action of its own weight, so that the vertical lifting portion (21) on the retaining pile (2) is exposed; S4: The hook assembly (4) is mounted on the vertical lifting portion (21), and the sling assembly (3) cooperates with the hook assembly (4) to deflect the retaining pile (2) to an upright state under the action of its own gravity.

2. The hoisting method according to claim 1, characterized in that: Step S4 specifically includes the following steps: S4a: installing the hook assembly (4) on the vertical lifting part (21), controlling the sling assembly (3) and the hook assembly (4) to pull the retaining pile (2) up to a preset height, and translate it to a pile sinking position; S4b: Control the sling assembly (3) to descend, so that the retaining pile (2) is deflected from a horizontal state to an upright state under the action of its own weight with the portion of the hook assembly (4) cooperating with the vertical lifting portion (21) as the axis, so as to facilitate the sinking of the retaining pile (2) in the upright state.

3. An auxiliary lifting device, characterized in that: The hoisting method according to claim 1 or 2 comprises: A base (11), wherein a retaining pile docking portion is provided on the base (11), and the base (11) can be installed at an end of the retaining pile (2) in the length direction through the retaining pile docking portion; A lifting connection part (12), the lifting connection part (12) is fixed to the base (11) and is used to connect the lifting rope assembly (3).

4. The auxiliary lifting device (1) according to claim 3, characterized in that: The retaining pile docking portion comprises a connection hole (111).

5. The auxiliary lifting device (1) according to claim 3, characterized in that: The base (11) and the lifting connection portion (12) are fixedly connected via a connecting rod (13).

6. The auxiliary lifting device (1) according to claim 5, characterized in that: A reinforcing rib (14) is fixedly provided on the connecting rod (13), and the reinforcing rib (14) is fixed to the base (11) and / or the reinforcing rib (14) is fixed to the lifting connection portion (12).

7. The auxiliary lifting device (1) according to claim 3, characterized in that: The lifting connection portion (12) is provided with a mounting hole (121) for connecting the lifting cable assembly (3).

8. A retaining pile, characterized in that: The auxiliary lifting device according to any one of claims 3 to 7 is used for auxiliary lifting and movement, and the retaining pile (2) is provided with a vertical lifting part (21) for cooperating with the hook assembly (4) in the thickness direction, and the position of the vertical lifting part (21) is close to one end of the retaining pile (2) in the length direction, and in the length direction parallel to the retaining pile (2), the axis of the vertical lifting part (21) is coplanar with the center of gravity of the retaining pile (2).

9. The retaining pile (2) according to claim 8, characterized in that: The retaining pile (2) is provided with a plurality of fixing holes (23) on both end faces in the length direction, and at least a portion of the fixing holes (23) correspond one-to-one with the connecting holes (111) on the base (11), and fasteners penetrate the connecting holes (111) and are connected to the fixing holes (23) so that the auxiliary sling (1) is fixedly mounted on the two end faces of the retaining pile (2).

10. The retaining pile (2) according to claim 8, characterized in that: The retaining pile (2) is provided with two hollow holes (22) in the length direction, and the auxiliary lifting device (1) is installed at both ends of any one of the hollow holes (22).

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