Forming device and construction method of easily disassembled anti-slide pile retaining wall

Abstract

The application provides a forming device and construction method of an easily disassembled anti-slide pile retaining wall. The forming device comprises a pre-embedded main body, the pre-embedded main body comprises a first pre-embedded section, a second pre-embedded section and a third pre-embedded section which are dispersed along the direction of pile height, the first pre-embedded section and the third pre-embedded section are arranged in opposite bending directions relative to the second pre-embedded section; and a connecting rib which is at least partially located outside the pre-embedded main body and is used to connect the retaining wall steel bars and the pre-embedded main body. The pre-embedded main body is used to pre-separate the retaining wall in the transverse direction, and a through cavity is formed after the later removal, so that a gap is generated between the originally closely fitted retaining wall and the pile body, the difficulty of retaining wall chiseling and the construction time are greatly reduced, meanwhile, the impact damage to the pile body caused by the traditional breaking method is avoided, and the appearance quality of the pile body is ensured.

Description

Technical Field

[0001] This invention relates to the field of anti-slide pile construction technology, and in particular to a forming device and construction method for easily disassembled anti-slide pile retaining walls. Background Technology

[0002] During the manual excavation of anti-slide piles, in areas with poor geological conditions, it is usually necessary to pour a retaining wall to isolate the anti-slide pile from the surrounding soil, thereby ensuring the stability and safety of the borehole wall and preventing collapse accidents. After the anti-slide pile is poured, a portion of the pile body needs to be excavated to construct the pile inter-slab and anchor cables. At this time, the retaining wall in the corresponding area must be removed.

[0003] Traditional wall-supporting casting technology uses formwork for integral casting, resulting in a strong bond between the wall-supporting structure and the pile body with high strength. Removing the wall-supporting structure not only consumes a lot of time, but also easily damages the pile body during the removal process, affecting the appearance quality.

[0004] Therefore, how to reduce the risk of damage to the pile body during the removal of the retaining wall while improving construction efficiency has become an urgent technical problem to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a molding device and construction method for easily disassembled anti-slide pile retaining walls, thereby overcoming the shortcomings in the aforementioned background technology.

[0006] The technical solution of this invention is: a molding device for easily disassembled anti-slide pile retaining walls, comprising:

[0007] The embedded body includes a first embedded section, a second embedded section, and a third embedded section distributed along the pile height direction. The first embedded section and the third embedded section are bent relative to the second embedded section and the bending directions are opposite.

[0008] Connecting bars, at least partially located outside the embedded body, are used to connect the retaining wall reinforcement and the embedded body.

[0009] Furthermore, along the circumference of the retaining wall, the first embedded section and the third embedded section bend toward both sides of the second embedded section.

[0010] Furthermore, the second embedded section extends along the pile height direction.

[0011] Furthermore, the angle between the first embedded section and the second embedded section is greater than 135°, and the angle between the third embedded section and the second embedded section is greater than 135°.

[0012] Furthermore, the pre-embedded body is a non-metallic hollow component, with several stiffening ribs spaced apart along the pile height direction in its inner cavity, and the outer periphery of each stiffening rib is fixedly connected to the inner wall of the pre-embedded body.

[0013] Furthermore, the surface of the stiffening rib is perpendicular to the pile height direction.

[0014] Furthermore, a number of connecting bars are provided through the pre-embedded main body, and at least some of the connecting bars are distributed at intervals along the pile height direction and extend circumferentially along the retaining wall.

[0015] Furthermore, the surface of the pre-embedded main body facing the retaining wall is a rough surface, while the surface facing the pile body is a smooth surface.

[0016] The technical solution of the present invention also includes: a construction method using the above-mentioned easily disassembled anti-slide pile retaining wall forming device, which includes at least the following steps:

[0017] Constructing the retaining wall: Tie the retaining wall reinforcement, place the embedded main body in the preset joint position of the retaining wall reinforcement, use connecting bars to connect and fix the embedded main body to the retaining wall reinforcement, set up the formwork and pour the retaining wall.

[0018] Anti-slide pile drilling and construction;

[0019] Partial wall removal: Cut the connecting bars, remove the embedded main body, and remove the wall concrete from the embedded main body to both sides.

[0020] The beneficial effects of this invention include: pre-dividing the retaining wall laterally by embedding the main body, which then forms a through cavity after removal, creating gaps between the originally tightly fitted retaining wall and the pile body. This significantly reduces the difficulty and time required for removing the retaining wall, while avoiding the impact damage to the pile body caused by traditional demolition methods, thus ensuring the appearance quality of the pile body. Furthermore, the non-monolithic linear structure of the embedded main body allows for staggered overlap of the retaining wall concrete on both sides, ensuring the structural continuity and overall strength of the retaining wall along the circumferential direction during its service life. This ensures the retaining wall effectively protects the borehole. Simultaneously, this bent structure increases the contact area between the embedded main body and the concrete of the retaining walls on both sides, resulting in a tighter bond and further enhancing the load-bearing capacity and stability of the retaining wall during use. In addition, the pre-embedded main body, by separating the retaining wall concrete, effectively releases the internal shrinkage stress generated during concrete setting and hardening, reducing random cracks in the retaining wall concrete and further ensuring the construction quality of the retaining wall. Attached Figure Description

[0021] Figure 1 This is a construction diagram of an embodiment of the present invention;

[0022] Figure 2 This is a front view of an embodiment of the present invention;

[0023] Figure 3 This is a perspective view of an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of an embodiment of the present invention;

[0025] Figure 5 This is a longitudinal sectional view of an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Embedded main body; 11. First embedded section; 12. Second embedded section; 13. Third embedded section;

[0028] 2. Connecting reinforcement bars;

[0029] 3. Stiffening ribs;

[0030] 4. Wall protection;

[0031] 5. Reinforcing steel bars for the wall;

[0032] 6. Anti-slide piles. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] In the description of the embodiments of this invention, it should be understood that the terms "top," "bottom," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0035] Reference Appendix Figure 1-5 This invention provides a forming device for easily disassembled anti-slide pile retaining walls. The device includes a pre-embedded body 1 and connecting bars 2. The pre-embedded body 1 is a non-metallic hollow component with an overall thickness consistent with the thickness of the retaining wall 4. Specifically, it includes a first pre-embedded section 11, a second pre-embedded section 12, and a third pre-embedded section 13 distributed along the pile height direction. Furthermore, along the circumference of the retaining wall 4, the first pre-embedded section 11 and the third pre-embedded section 13 are bent towards both sides of the second pre-embedded section 12, respectively. The connecting bars 2 are at least partially located outside the pre-embedded body 1 and can be selected from bars of the same specifications as the retaining wall reinforcing bars 5, used to connect the retaining wall reinforcing bars 5 and the pre-embedded body 1.

[0036] During the construction of the retaining wall 4, the retaining wall reinforcement 5 is tied first, and the pre-embedded main body 1 is placed at the preset joint position, so that the first pre-embedded section 11, the second pre-embedded section 12 and the third pre-embedded section 13 are distributed along the pile height direction. The pre-embedded main body 1 and the retaining wall reinforcement 5 are connected and fixed by the connecting reinforcement 2. Then, the formwork is erected and the concrete of the retaining wall 4 is poured. After curing, a structure is formed in which concrete, pre-embedded main body 1 and concrete are distributed in sequence along the circumference of the retaining wall 4.

[0037] Before constructing the pile slab and anchor cables, the connecting reinforcement 2 is cut off, and the embedded main body 1 is removed from the retaining wall 4. After the embedded main body 1 is removed, a cavity penetrating the thickness of the retaining wall 4 is formed in its original position. This cavity divides the retaining wall 4 into two independent parts in the horizontal direction and connects the originally tightly fitted contact surface between the retaining wall 4 and the pile body to the outside atmosphere. Workers gradually chisel along both sides of the cavity towards the part of the retaining wall 4 that needs to be broken. Since the retaining wall 4 has been pre-broken and the contact surface between the retaining wall 4 and the pile body is no longer tightly fitted, the chiseling resistance is significantly reduced. Finally, the retaining wall reinforcement 5 in this part is cut off, and the pile body in this part is completely exposed, allowing the next construction process to begin.

[0038] Compared with existing technologies, this invention pre-divides the retaining wall 4 laterally by embedding the main body 1, forming a through cavity after later removal. This creates gaps between the originally tightly fitted retaining wall 4 and the pile body, significantly reducing the difficulty and construction time of chiseling the retaining wall 4. It also avoids the impact damage to the pile body caused by traditional demolition methods, ensuring the appearance quality of the pile body. Furthermore, the non-linear structure of the embedded main body 1 allows the concrete of the retaining wall 4 on both sides of the embedded main body 1 to form a staggered overlap. During the service life of the retaining wall 4, this ensures the structural continuity and overall strength of the retaining wall 4 along the circumferential direction, ensuring that the retaining wall 4 can effectively perform its hole-protecting function. This bent structure also increases the contact area between the embedded main body 1 and the concrete of the retaining walls on both sides, resulting in a tighter bond and further improving the load-bearing capacity and stability of the retaining wall 4 during use. In addition, the pre-embedded main body 1 separates the concrete of the retaining wall 4, effectively releasing the internal shrinkage stress generated during concrete setting and hardening, reducing random cracks in the concrete of the retaining wall 4, and further ensuring the construction quality of the retaining wall 4.

[0039] It is worth noting that, along the pile height direction, the overall length of the pre-embedded main body 1 should match the range of the protective wall 4 required for the subsequent construction of the pile inter-slab and anchor cables. The pre-embedded main body 1 is only set in the parts that need to be broken, and the protective wall 4 in the remaining parts is still a continuously poured concrete structure, so as to ensure that the protective wall 4 has sufficient overall strength and stability during the manual excavation construction and fully exert its hole protection function.

[0040] Preferably, the surface of the embedded main body 1 facing the retaining wall 4 is rough, while the surface facing the pile body is smooth. This arrangement increases the contact area and friction between the embedded main body 1 and the concrete of the retaining wall 4, resulting in a tighter bond and ensuring that the retaining wall 4 and the embedded main body 1 work together to maintain structural integrity during service. The smooth surface facing the pile body reduces adhesion between the embedded main body 1 and the pile body concrete during later removal, facilitating easy removal and preventing damage to the pile surface due to adhesion.

[0041] Preferably, the second embedded section 12 extends along the pile height direction, forming a vertically oriented embedded structure in the retaining wall 4, which facilitates coordinated layout with the vertical reinforcing bars in the retaining wall reinforcement 5 skeleton and makes positioning more convenient during construction.

[0042] Preferably, the angle between the first embedded section 11 and the second embedded section 12 is greater than 135°, and the angle between the third embedded section 13 and the second embedded section 12 is greater than 135°. That is, the angle between the first embedded section 11 and the horizontal direction is greater than 45°, and the angle between the third embedded section 13 and the horizontal direction is greater than 45°. This makes the first embedded section 11 and the third embedded section 13 extend closer to the pile height direction. While ensuring that the embedded body 1 has a bent shape to form a staggered overlap, the bending transition is made smoother. This ensures that the concrete can fall smoothly during pouring and fully fill the space around the embedded body 1, preventing quality problems such as honeycomb and pitted surface.

[0043] To improve the structural rigidity of the embedded main body 1, this technical solution includes several stiffening ribs 3 spaced apart along the pile height direction within its inner cavity. The outer periphery of each stiffening rib 3 is fixedly connected to the inner wall of the embedded main body 1. The stiffening ribs 3 effectively enhance the rigidity of the embedded main body 1, ensuring its shape remains stable during the pouring of the retaining wall 4 and subsequent use, and preventing deformation or displacement due to concrete lateral pressure or construction loads.

[0044] Preferably, the stiffening rib plate 3 is perpendicular to the pile height direction. This arrangement allows the stiffening rib plate 3 to form a horizontal support structure inside the embedded body 1, which can effectively resist the horizontal earth pressure borne by the retaining wall 4 during its service life and prevent the embedded body 1 from deforming under horizontal load.

[0045] Optionally, the pre-embedded main body 1 is made of PVC material, which can meet the stability requirements of the retaining wall 4 during its service life. By working together with the surrounding concrete, it can jointly bear the soil load, ensure the overall structural safety of the retaining wall 4, and is easy to dismantle.

[0046] In this technical solution, several connecting bars 2 are installed through the embedded main body 1 (the penetration points of the connecting bars 2 should be sealed to prevent concrete from seeping into the embedded main body 1). Some or all of the connecting bars 2 are distributed at intervals along the pile height direction and extend circumferentially along the retaining wall 4. This arrangement allows the connecting bars 2 to form an effective connection with the transverse bars in the retaining wall reinforcement 5 skeleton, reliably fixing the embedded main body 1 to the retaining wall reinforcement 5 skeleton and preventing it from shifting during concrete pouring.

[0047] In actual construction, multiple devices can be installed along the circumference of the retaining wall 4, depending on design requirements and stability considerations. For example, for a square anti-slide pile 6, one device can be installed on each of its two opposite sides of the retaining wall 4, for a total of two devices. This arrangement can effectively improve the efficiency and quality of the subsequent chiseling of the retaining wall 4 while ensuring the overall strength and stability of the retaining wall 4.

[0048] Compared with existing technologies, the beneficial effects of this invention include at least the following: By pre-dividing the retaining wall 4 laterally through the embedded main body 1, a through cavity is formed after subsequent removal. This creates gaps between the originally tightly fitted retaining wall 4 and the pile body, significantly reducing the difficulty and construction time of chiseling the retaining wall 4, while avoiding impact damage to the pile body caused by traditional demolition methods, thus ensuring the appearance quality of the pile body. Furthermore, the non-integral straight structure of the embedded main body 1 allows the concrete of the retaining wall 4 on both sides of the embedded main body 1 to form a staggered overlap. During the service life of the retaining wall 4, this ensures the structural continuity and overall strength of the retaining wall 4 along the circumferential direction, ensuring that the retaining wall 4 can effectively perform its hole-protecting function. Simultaneously, this bent structure increases the contact area between the embedded main body 1 and the concrete of the retaining walls on both sides, resulting in a tighter bond and further improving the load-bearing capacity and stability of the retaining wall 4 during use. In addition, the pre-embedded main body 1 separates the concrete of the retaining wall 4, effectively releasing the internal shrinkage stress generated during concrete setting and hardening, reducing random cracks on the concrete of the retaining wall 4, and further ensuring the construction quality of the retaining wall 4.

[0049] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A molding device for easily disassembled anti-slide pile retaining walls, characterized in that, include: The embedded body includes a first embedded section, a second embedded section, and a third embedded section distributed along the pile height direction. The first embedded section and the third embedded section are bent relative to the second embedded section and the bending directions are opposite. Connecting bars, at least partially located outside the embedded body, are used to connect the retaining wall reinforcement and the embedded body.

2. The forming device for easily disassembled anti-slide pile retaining wall according to claim 1, characterized in that, Along the circumference of the retaining wall, the first embedded section and the third embedded section bend toward both sides of the second embedded section.

3. The forming device for easily disassembled anti-slide pile retaining wall according to claim 1 or 2, characterized in that, The second pre-embedded section extends along the pile height direction.

4. The forming device for easily disassembled anti-slide pile retaining wall according to claim 3, characterized in that, The angle between the first embedded section and the second embedded section is greater than 135°, and the angle between the third embedded section and the second embedded section is greater than 135°.

5. The forming device for easily disassembled anti-slide pile retaining wall according to any one of claims 1-2 and 4, characterized in that, The pre-embedded body is a non-metallic hollow component, with several stiffening ribs spaced apart along the pile height direction in its inner cavity, and the outer periphery of each stiffening rib is fixedly connected to the inner wall of the pre-embedded body.

6. The forming device for easily disassembled anti-slide pile retaining wall according to claim 5, characterized in that, The stiffening rib plate is perpendicular to the pile height direction.

7. The forming device for easily disassembled anti-slide pile retaining walls according to any one of claims 1-2, 4, and 6, characterized in that, The pre-embedded main body is provided with a number of connecting bars, at least some of which are distributed at intervals along the pile height direction and extend circumferentially along the retaining wall.

8. The forming device for easily disassembled anti-slide pile retaining wall according to claim 7, characterized in that, The surface of the pre-embedded main body facing the retaining wall is rough, while the surface facing the pile body is smooth.

9. A method for construction using the easily disassembled anti-slide pile retaining wall forming device according to any one of claims 1-8, characterized in that, At least the following steps are included: Constructing the retaining wall: Tie the retaining wall reinforcement, place the embedded main body in the preset joint position of the retaining wall reinforcement, use connecting bars to connect and fix the embedded main body to the retaining wall reinforcement, set up the formwork and pour the retaining wall. Anti-slide pile drilling and construction; Partial wall removal: Cut the connecting bars, remove the embedded main body, and remove the wall concrete from the embedded main body to both sides.

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