Sling and method for precast sheet pile construction using the sling

Abstract

The present invention belongs to the technical field of foundation pit engineering construction, and discloses a lifting member and a method for constructing precast sheet piles by using the lifting member. The lifting member includes a bottom plate, a main plate, two side plates and an auxiliary plate. The bottom plate is configured to be connected to the precast sheet pile. The main plate is arranged on the bottom plate and perpendicular to the bottom plate. The two side plates are both arranged on the bottom plate and are parallel to each other. The main plate is clamped between the two side plates. The auxiliary plate is clamped between the two side plates and abuts against the main plate. A reserved hole is penetratingly arranged on the auxiliary plate, and a support plate can pass through the reserved hole and be erected on the support surface to fix the precast sheet pile. The present invention ensures a tight connection with the precast sheet pile through the bottom plate, and the reserved hole of the auxiliary plate facilitates the passing of the support plate, so as to ensure that the precast sheet pile stays at the preset elevation. Moreover, the position and flatness of the precast sheet pile can be changed through the arrangement of the support plate, so that the precast sheet pile meets the requirements of flatness and perpendicularity.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit engineering construction, and particularly relates to a lifting member and a method for constructing precast sheet piles by using the lifting member. Background Art

[0002] The TAD (Trench cutting Assembled Diaphragm wall) method, that is, the channel cutting and assembled diaphragm wall method, involves inserting precast sheet piles into the cement soil wall of the channel cutting cement soil continuous wall (or double-wheel hinge wall forming) to form an assembled diaphragm wall. In the actual operation process, for the deep drop groove section in the precast sheet piles, temporary welding fixation is usually adopted, that is, after welding and fixing two precast sheet piles, they are then continuously dropped into the groove to complete the production of the diaphragm wall. However, the welding process cannot guarantee the perpendicularity between the two precast sheet piles, resulting in poor guiding and perpendicularity of the deep drop groove section. Moreover, the welding method is likely to damage the precast sheet piles, and the upper precast sheet piles cannot be reused, increasing the operation cost. It is also difficult to adjust the flatness and perpendicularity of the lower precast sheet piles after they are dropped into the groove, affecting the operation quality and prone to safety problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a lifting member and a method for constructing precast sheet piles by using the lifting member. The lifting member can be reused, reducing the operation cost, and can provide guidance for the installation process of the precast sheet piles. Using the lifting member to construct precast sheet piles can also achieve timely adjustment of the flatness and perpendicularity of the precast sheet piles, reduce quality problems, and lower safety risks.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A lifting member, which includes:

[0006] A bottom plate configured to connect to the precast sheet pile;

[0007] A main board disposed on the bottom plate and perpendicular to the bottom plate;

[0008] Two side plates, both disposed on the bottom plate, and the two side plates are parallel to each other, and the main board is clamped between the two side plates;

[0009] An auxiliary board, the auxiliary board is clamped between the two side plates, and a reserved hole is penetrated through the auxiliary board for a support plate to pass through, and the support plate can be erected on the support surface.

[0010] Optionally, there are two auxiliary boards, the two auxiliary boards are parallel to each other and are respectively abutted against both sides of the main board.

[0011] Optionally, a lifting hole is also penetratingly provided on the auxiliary plate, and the lifting member can be lifted or lowered through the lifting hole.

[0012] Optionally, the proportion of the reserved hole on the auxiliary plate is greater than 50%.

[0013] Optionally, the reserved hole is set as a square hole.

[0014] Optionally, fixing holes are provided on the bottom plate, and connecting holes are provided on the precast sheet pile. The connecting holes and the fixing holes are arranged in one-to-one correspondence, and fasteners can pass through the fixing holes and the connecting holes to connect the bottom plate and the precast sheet pile.

[0015] Optionally, the bottom plate, the main board and the side board are perpendicular to each other in pairs.

[0016] Optionally, the auxiliary plate is arranged parallel to the main board.

[0017] Optionally, the main board and the side board have the same height relative to the bottom plate.

[0018] A method for constructing a precast sheet pile using a lifting member, which includes:

[0019] S1. Lift the lifting member onto the precast sheet pile;

[0020] S2. Use fasteners to connect the bottom plate and the precast sheet pile;

[0021] S3. Lower the precast sheet pile to the design elevation of the deep groove of the guide wall;

[0022] S4. After passing the support plate through the reserved hole, place it on the support surface of the guide wall;

[0023] S5. Use a level to adjust the position of the lifting member until the planar accuracy and verticality of the precast sheet pile meet the requirements.

[0024] The beneficial effects of the present invention:

[0025] The bottom plate of the lifting member can ensure a tight connection with the precast sheet pile, and provide good guiding performance under the setting of the main plate and the side plate, avoiding large deviations in the verticality during the co-lowering process of the precast sheet pile and the lifting member. The setting of the auxiliary plate improves the mechanical strength of the lifting member, and the setting of the reserved holes facilitates the penetration of the support plate. Specifically, after the lifting member is connected to the precast sheet pile, the precast sheet pile is lowered to the preset elevation, the support plate penetrates through the reserved holes, and is erected on the support surface to ensure that the precast sheet pile stays at the preset elevation. At the same time, by changing the number and thickness of the support plates, the height and flatness of the lifting member relative to the support surface can be adjusted in real time, thereby changing the position and flatness of the precast sheet pile, so that the precast sheet pile meets the requirements of flatness and verticality. The method of using the lifting member for precast sheet pile construction can accurately and stably install each precast sheet pile in the underground continuous wall into the guide wall deep groove according to the requirements of plane accuracy and verticality. At the same time, since the connection between the lifting member and the precast sheet pile is detachable, the lifting member can be disassembled and reused after the precast sheet pile is fixed, reducing the operation cost and improving the utilization rate of parts. At the same time, the support plate penetrating through the reserved holes can erect the lifting member on the support surface to ensure that the precast sheet pile is installed to the preset elevation. Further, the height and flatness of the lifting member relative to the support surface are adjusted so that the precast sheet pile meets the requirements of flatness and verticality, so as to achieve efficient and high-quality operation and reduce safety problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the front view schematic diagram of the lifting member described in the embodiment of the present invention;

[0027] Figure 2 is the top view schematic diagram of the lifting member described in the embodiment of the present invention;

[0028] Figure 3 is the flow schematic diagram of the method for precast sheet pile construction using the lifting member described in the embodiment of the present invention.

[0029] In the figure:

[0030] 10 - bottom plate; 20 - main plate; 30 - side plate; 40 - auxiliary plate;

[0031] 101 - fixing hole; 401 - lifting hole; 402 - reserved hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar components or components with like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0033] During the actual operation process, for the deep-drop groove section in the precast sheet pile, temporary welding fixation is usually adopted. That is, after welding and fixing two precast sheet piles, they are then continuously dropped into the groove to complete the construction of the diaphragm wall. However, the welding process cannot ensure the perpendicularity between the two precast sheet piles, resulting in poor guiding and verticality of the deep-drop groove section. Moreover, the welding method is likely to damage the precast sheet piles, and the upper precast sheet piles cannot be reused, increasing the operation cost. It is also difficult to adjust the flatness and perpendicularity of the lower precast sheet piles after they are dropped into the groove, affecting the operation quality and prone to safety problems.

[0034] The technical solutions of this embodiment will be further described below with reference to the accompanying drawings and specific implementation manners.

[0035] As Figure 1 - Figure 2 shown, this embodiment provides a lifting member, including a bottom plate 10, a main plate 20, side plates 30, and an auxiliary plate 40. The bottom plate 10 is configured to connect to the precast sheet pile. The main plate 20 is disposed on the bottom plate 10 and perpendicular to the bottom plate 10. The two side plates 30 are both disposed on the bottom plate 10 and are parallel to each other. The main plate 20 is clamped between the two side plates 30. The auxiliary plate 40 is clamped between the two side plates 30. A reserved hole 402 is provided through the auxiliary plate 40. The reserved hole 402 is used for the support plate to pass through, and the support plate can be erected on the support surface.

[0036] As shown Figure 3 in the figure, this embodiment also provides a method for constructing precast sheet piles using a lifting member, including:

[0037] S1. Lift the lifting member onto the precast sheet pile;

[0038] S2. Use fasteners to connect the bottom plate 10 to the precast sheet pile;

[0039] S3. Lower the precast sheet pile to the designed elevation of the guide wall deep groove;

[0040] S4. After passing the support plate through the reserved hole 402, place it on the support surface of the guide wall;

[0041] S5. Use a level to adjust the position of the lifting member until the flatness and verticality of the precast sheet pile meet the requirements.

[0042] In this embodiment, the bottom plate 10 of the lifting member can ensure a tight connection with the precast sheet pile, and provide good guiding performance under the settings of the main plate 20 and the side plate 30, avoiding large deviations in verticality during the process of jointly lowering the precast sheet pile and the lifting member. The setting of the auxiliary plate 40 improves the mechanical strength of the lifting member, and the setting of the reserved hole 402 facilitates the passing of the support plate. Specifically, after the lifting member is connected to the precast sheet pile, the precast sheet pile is lowered to the preset elevation, the support plate passes through the reserved hole 402, and is placed on the support surface to ensure that the precast sheet pile stays at the preset elevation. At the same time, by changing the number and thickness of the support plates, the height and flatness of the lifting member relative to the support surface can be adjusted in real time, thereby changing the position and flatness of the precast sheet pile, so that the precast sheet pile meets the requirements of flatness and verticality.

[0043] The method for constructing precast sheet piles using a lifting member can accurately and stably install each precast sheet pile in the underground diaphragm wall into the guide wall deep groove according to the requirements of flatness and verticality. At the same time, since the connection between the lifting member and the precast sheet pile is detachable, the lifting member can be disassembled and reused after the precast sheet pile is fixed, reducing the operation cost and improving the utilization rate of parts. At the same time, passing the support plate through the reserved hole 402 can place the lifting member on the support surface to ensure that the precast sheet pile is installed to the preset elevation. Further, adjusting the height and flatness of the lifting member relative to the support surface enables the precast sheet pile to meet the requirements of flatness and verticality, so as to achieve efficient and high-quality operation and reduce safety problems.

[0044] Next, the specific structure of the lifting member in this embodiment will be described.

[0045] As Figure 1 - Figure 2As shown, the lifting member includes a bottom plate 10, a main plate 20, side plates 30 and auxiliary plates 40. The bottom plate 10 is provided with fixing holes 101, and the auxiliary plates 40 are provided with lifting holes 401 and reserved holes 402. Optionally, the bottom plate 10, the main plate 20, the side plates 30 and the auxiliary plates 40 are all made of steel plates with a thickness of 1 cm. Specifically, the bottom plate 10 is configured to be detachably connected to the precast sheet piles in the drop deep groove section, so that the lifting member can be reused, effectively reducing the high cost of two precast sheet piles in the original method, and avoiding the damage to the precast sheet piles in the original welding method, reducing quality problems, and achieving efficient and high-quality operation.

[0046] Optionally, the main plate 20 and the side plates 30 are both arranged on the bottom plate 10, and the auxiliary plates 40 are arranged on the side plates 30 and are adjacent to the main plate 20. Optionally, there are two side plates 30 and two auxiliary plates 40. The two side plates 30 are arranged in parallel, and both are arranged on the bottom plate 10. The main plate 20 and the two auxiliary plates 40 are both clamped between the two side plates 30. Further, the two auxiliary plates 40 are also arranged in parallel and are adjacent to both sides of the main plate 20. In this embodiment, the bottom plate 10, the main plate 20 and the side plates 30 are perpendicular to each other in pairs, and the auxiliary plates 40 are arranged parallel to the main plate 20. In this way, the bottom plate 10, the main plate 20 and the side plates 30 can form a cubic structure, which can achieve a better guiding function after being connected to the precast sheet piles, can form a better verticality with the precast sheet piles, is convenient for smooth movement in the deep groove of the guide wall, and ensures high-precision installation. Further, the two auxiliary plates 40 make the connection strength between the side plates 30 and the main plate 20 higher and extend the service life of the lifting member.

[0047] Specifically, a plurality of fixing holes 101 are provided on the bottom plate 10, such as Figure 2 As shown, in this embodiment, four fixing holes 101 are respectively arranged on both sides of the bottom plate 10 along the length direction. The centers of the four fixing holes 101 are located on the same straight line, and the fixing holes 101 on both sides are symmetrically arranged with respect to the main plate 20, which is convenient for stably connecting the precast sheet piles. Optionally, connection holes are provided on the top plate of the precast sheet pile, and the number and position of the connection holes correspond to the fixing holes 101 one by one. The fasteners sequentially pass through the connection holes and the fixing holes 101 to tightly connect the bottom plate 10 and the precast sheet pile together. Exemplarily, both the connection holes and the fixing holes 101 are provided as threaded holes, and the fasteners are provided as bolts. The bolts pass through the two threaded holes and are screwed to the bottom plate 10 and the top plate of the precast sheet pile at the same time to achieve stable connection between the two.

[0048] Specifically, both the main board 20 and the side board 30 are perpendicular to the bottom board 10, and both are fixedly connected to the bottom board 10. In this embodiment, relative to the bottom board 10, the main board 20 and the side board 30 have the same height, that is, the top surfaces of the main board 20 and the side board 30 are on the same horizontal plane. Optionally, the lengths of the main board 20 and the side board 30 are greater than the penetration depth of the precast sheet pile after connecting the lifting member in the groove. Exemplarily, the penetration depth of the precast sheet pile after connecting the lifting member is 50 cm. At this time, the lengths of the main board 20 and the side board 30 are greater than 50 cm, so that the top end of the lifting member can be exposed in the deep groove of the guide wall and is higher than the top surface of the deep groove, that is, the supporting surface of the guide wall, which is convenient for subsequent support adjustment of the support plate.

[0049] Optionally, the lifting hole 401 runs through the main board 20 and the auxiliary board 40, so that the whole lifting member can be lifted or lowered through the lifting hole 401. Exemplarily, the lifting hole 401 is a circular hole, and its size is set according to needs. Further, the top surface of the auxiliary board 40 is on the same horizontal plane as the top surfaces of the main board 20 and the side board 30, and the length of the auxiliary board 40 is less than the lengths of the main board 20 and the side board 30, so as to reduce the weight while improving the connection strength.

[0050] Optionally, the reserved hole 402 also runs through the main board 20 and the auxiliary board 40, and the reserved hole 402 is for the support plate to pass through, and the support plate can be erected on the support surface. Exemplarily, the reserved hole 402 is set as a square hole, and its proportion on the auxiliary board 40 is greater than 50%. The square design facilitates the stable insertion of the support plate into the reserved hole 402. The larger the proportion, the larger the range of the number and thickness of the support plates inserted into the reserved hole 402, and thus the precast sheet pile can be better adjusted to meet the requirements of flatness and perpendicularity. Specifically, the support plate passes through the reserved hole 402 and is erected on the support surface of the guide wall to fix the position of the precast sheet pile in the deep groove. Exemplarily, the support plate is a section steel.

[0051] As Figure 3 shown, the steps S1 of using the lifting member for precast sheet pile construction include: lifting the lifting member onto the precast sheet pile. Specifically, the whole lifting member is lifted through the lifting hole 401, thus realizing the lifting operation.

[0052] Further, steps S2 - S4 include:

[0053] S2. Connect the bottom board 10 and the precast sheet pile using fasteners;

[0054] S3. Lower the precast sheet pile to the designed elevation in the deep groove of the guide wall;

[0055] S4. After passing the support plate through the reserved hole 402, erect it on the support surface of the guide wall;

[0056] Specifically, after the lower precast sheet piles are inserted into the trench using the TAD method, they are temporarily placed at a position 1 meter above the ground. Then, the top plate of the lower precast sheet pile is fixedly connected to the bottom plate 10 of the lifting member through fasteners. In this way, the lifting member can serve as a guiding section to ensure the verticality of the precast sheet piles during the TRD construction process. It can also be used to lift the upper sheet piles and lower the lower precast sheet piles to the design elevation, and then they are placed on the wall through the support plate to form a shape.

[0057] Furthermore, step S5 includes: using a level to adjust the position of the lifting member until the plane accuracy and verticality of the precast sheet piles meet the requirements. Specifically, the position between the lifting member and the guide wall plane is measured by the level, and the correction is carried out by adjusting the position of the support plate, thereby ensuring that the plane accuracy and verticality of the precast sheet piles meet the requirements. Exemplarily, after the correction is completed, it is left to stand for 7 - 14 days until the precast sheet piles initially set. At this time, the lifting member is excavated and disassembled, enabling the reuse of the lifting member, achieving high-quality operation, reducing costs, and reducing safety issues.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, based on the above description, other different forms of changes or variations can be made. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Suspension part, characterized in that, Comprising: A bottom plate (10), configured to connect to precast sheet piles; A main board (20), disposed on the bottom plate (10) and perpendicular to the bottom plate (10); Two side plates (30), both disposed on the bottom plate (10), and the two side plates (30) are arranged in parallel, and the main board (20) is clamped between the two side plates (30); An auxiliary board (40), the auxiliary board (40) is clamped between the two side plates (30), and a reserved hole (402) is provided through the auxiliary board (40), and the reserved hole (402) is used for a support plate to pass through, and the support plate can be erected on a support surface; There are two auxiliary boards (40), the two auxiliary boards (40) are arranged in parallel and respectively abut against both sides of the main board (20); A lifting hole (401) is also provided through the auxiliary board (40), and the lifting or lowering of the lifting member can be achieved through the lifting hole (401); The proportion of the reserved hole (402) on the auxiliary board (40) is greater than 50%; The reserved hole (402) is set as a square hole; Fixing holes (101) are provided on the bottom plate (10), connecting holes are provided on the precast sheet piles, the connecting holes and the fixing holes (101) are arranged in one-to-one correspondence, and fasteners can pass through the fixing holes (101) and the connecting holes to connect the bottom plate (10) and the precast sheet piles; The bottom plate (10), the main board (20) and the side plates (30) are perpendicular to each other pairwise; after the lifting member is connected to the precast sheet pile, the precast sheet pile is lowered to a preset elevation, the support plate passes through the reserved hole and is erected on the support surface to ensure that the precast sheet pile stays at the preset elevation. At the same time, by changing the number and thickness of the support plates, the height and flatness of the lifting member relative to the support surface can be adjusted in real time, thereby changing the position and flatness of the precast sheet pile, so that the precast sheet pile meets the requirements of flatness and perpendicularity.

2. The hanging member according to claim 1, wherein The auxiliary board (40) is arranged in parallel with the main board (20).

3. The hanging member according to claim 1, wherein, Relative to the bottom plate (10), the main board (20) and the side plates (30) have the same height.

4. A method for constructing precast sheet piles using the hanging member according to any one of claims 1 to 3, characterized in that Comprising: S1. Lift the lifting member onto the precast sheet pile; S2. Use fasteners to connect the bottom plate (10) and the precast sheet pile; S3. Lower the precast sheet pile to the designed elevation of the guide wall deep groove; S4. After passing the support plate through the reserved hole (402), erect it on the support surface of the guide wall; S5. Use a level to adjust the position of the lifting member until the flatness and perpendicularity of the precast sheet pile meet the requirements.

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