Slide-resistant pile cantilever section formwork structure

Abstract

The utility model relates to the technical field of slide-resistant pile formworks, and provides a slide-resistant pile cantilever section formwork structure which comprises plane formworks, the adjacent plane formworks are connected through corner pieces to form a quadrangular cylinder in a surrounding mode, and the outer sides of the plane formworks are connected with inclined strut assemblies. Opposite pull rods used for limiting external expansion of the plane formworks are connected between the plane formworks which are oppositely arranged, the opposite pull rods are arranged in an up-down staggered mode, and side pull rods are connected between the adjacent plane formworks in a mode of penetrating through the corner pieces. And by combining the synergistic effect of the inclined strut assemblies, the staggered opposite pull rods and the side pull rods penetrating through the corner pieces, rapid installation and high-precision positioning of the slide-resistant pile cantilever section formwork are achieved, and the overall rigidity and deformation resistance of the formwork are improved.

Description

Technical Field

[0001] This utility model relates to the field of anti-slide pile formwork technology, and more specifically, to an anti-slide pile cantilever section formwork structure. Background Technology

[0002] Anti-slide piles, as a type of retaining structure, are formed by excavating and pouring reinforced concrete to create piles. Their bending strength resists the sliding force of landslide debris, making them a key engineering measure for slope stabilization and landslide prevention. They are typically installed on cut slope platforms, fill slopes, and at the toe of landslides to enhance slope stability by isolating the sliding surface or resisting earth pressure. Anti-slide piles can be classified into circular and rectangular types based on their cross-sectional shape. Rectangular anti-slide piles, with their larger surface area and bending stiffness for the same cross-section, provide stronger retaining capacity and are therefore widely used in engineering practice.

[0003] However, during construction, due to terrain conditions and site environment limitations, anti-slide piles often have cantilever sections above ground level. To ensure the integrity of the pile body and avoid the collapse of the hole due to prolonged exposure of the lower part of the anti-slide pile, the concrete of the cantilever section must be poured continuously and quickly in one go with the lower pile body. This places high demands on the efficiency, accuracy, and strength of the formwork installation. Utility Model Content

[0004] The purpose of this utility model is to provide a formwork structure for the cantilever section of an anti-slide pile, which solves the problems of low installation efficiency and insufficient structural strength of traditional formwork.

[0005] This utility model is achieved through the following technical solution: a cantilever section template structure for anti-slide piles, including a planar template, adjacent planar templates are connected by corner pieces to form a quadrangular tube, a diagonal bracing assembly is connected to the outside of the planar template, and tie rods for limiting the outward expansion of the planar templates are connected between the relatively arranged planar templates, the tie rods are arranged vertically and horizontally, and a side tie rod is connected through the corner piece between adjacent planar templates.

[0006] Furthermore, the planar template includes a panel and a frame. Vertical ribs are spaced apart on the panel, and back ribs are horizontally connected to the vertical ribs. A first connecting hole for positioning and inserting a tie rod is opened in the middle of the back rib, and second connecting holes for positioning and connecting side tie rods are opened on both sides of the back rib at an angle.

[0007] Furthermore, the frame is bolted to the corner piece, and several strip holes are spaced apart on the frame.

[0008] Furthermore, the lower part of the flat template is provided with a door opening for discharging mud, and the door opening is detachably connected to a sealing baffle.

[0009] Furthermore, the diagonal bracing assembly includes a diagonal brace, one end of which is hinged to the planar template, and the other end of which is hinged to a connecting seat fixed to the ground.

[0010] Furthermore, the diagonal brace includes an inner rod and an outer rod, with the outer rod threaded to both ends of the inner rod for adjusting the length of the diagonal brace.

[0011] Furthermore, a sealing strip is provided between the flat template and the corner piece.

[0012] Furthermore, the inner surface of the planar template is coated with an anti-stick coating.

[0013] This utility model has at least the following advantages and beneficial effects: Through the modular planar template and corner piece combined quadrangular tube structure design, combined with the synergistic effect of the diagonal bracing components, staggered tie rods and side tie rods penetrating the corner piece, the rapid installation and high-precision positioning of the anti-slide pile cantilever section template are realized, improving the overall rigidity and deformation resistance of the template. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a cantilever section template structure for anti-slide piles provided by this utility model.

[0015] Figure 2 The front view of a cantilever section template structure for anti-slide piles provided by this utility model.

[0016] Figure 3 A cross-sectional view of a cantilever section template structure for anti-slide piles provided by this utility model.

[0017] Reference numerals: 1-Flat template, 10-Door hole, 11-Panel, 12-Frame, 13-Vertical rib, 14-Back rib, 15-Sealing baffle, 2-Corner piece, 3-Diagonal brace assembly, 31-Diagonal brace rod, 311-Inner rod, 312-Outer rod, 32-Connecting seat, 4-Tie rod, 5-Side tie rod. Detailed Implementation

[0018] The specific implementation method is described below with reference to the accompanying drawings.

[0019] Example

[0020] like Figures 1 to 3As shown in this embodiment, a template structure for the cantilever section of an anti-slide pile is disclosed, including a planar template 1. Adjacent planar templates 1 are connected by corner pieces 2 to form a quadrangular tube. A diagonal bracing assembly 3 is connected to the outside of the planar template 1. Tie rods 4, used to limit the outward expansion of the planar templates 1, are connected between the relatively arranged planar templates 1. The tie rods 4 are arranged vertically and alternately. Side tie rods 5 are connected through the corner pieces 2 between adjacent planar templates 1. Specifically, the planar template 1 can be prefabricated by modular welding of steel plates, and the corner pieces 2 can be made of angle steel. The modular assembly method significantly improves construction efficiency. Four planar templates 1 are assembled into a casting template for the cantilever section of the anti-slide pile using the corner pieces 2 and placed on a locking platform. Then, tie rods 4 are inserted through the relatively arranged planar templates 1 (i.e., front-to-back and left-to-right planar templates 1), and the ends of the tie rods 4 are limited, for example, by inserting pins or threaded nuts, to limit the outward expansion of the planar template 1. Initially, the tension rods can be pre-stressed inwards to offset some of the outward expansion force generated during concrete pouring. The staggered tie rods 4 form a mesh-like tension system through their staggered arrangement, effectively dispersing the expansion stress during concrete pouring and avoiding stress concentration caused by traditional single-row tie rods 4. The diagonal bracing assembly 3 provides lateral support, further resisting lateral pressure during concrete pouring. The side tie rods 5, penetrating the corner piece 2, significantly enhance the connection strength at adjacent formwork joints, improving the shear resistance of the corner area. After pouring, the tie rods 4 are cast into the concrete along with the reinforcing cage; protruding tie rods 4 are removed using tools, effectively enhancing the structural strength of the anti-slide pile.

[0021] Furthermore, in a specific implementation, the planar template 1 provided in this embodiment of the present invention includes a panel 11 and a frame 12. Vertical ribs 13 are spaced apart on the panel 11, and back ribs 14 are horizontally connected to the vertical ribs 13. A first connecting hole for positioning and inserting a tie rod 4 is opened in the center of the back rib 14, and second connecting holes for positioning and connecting side tie rods 5 are respectively opened obliquely on both sides of the back rib 14. Specifically, the spaced vertical ribs 13 form longitudinal reinforcing ribs, which, together with the horizontal back ribs 14, form a grid-like skeleton, improving the bending stiffness of the planar template 1. Several first connecting holes are symmetrically and evenly spaced in the center of the back ribs 14 to provide positioning for the tie rods 4, ensuring that the tension transmission path is distributed along the neutral axis of the template and avoiding eccentric force. The second connecting holes are obliquely positioned to tighten the joints and reduce grout leakage. In addition, the back rib 14 serves as both the load-bearing part of the tie rod 4 and the load-bearing part of the side tie rod 5. It is preferably made of cold-formed C-shaped steel, which has a significantly higher moment of inertia than traditional angle steel. Its end is welded with an end plate perpendicular to the side tie rod 5 to ensure the stability of the side tie rod 5 under stress.

[0022] Preferably, the frame 12 is bolted to the corner piece 2, and the frame 12 has a plurality of spaced-apart strip holes. The arrangement of the strip holes forms a continuous adjustment range, which can provide a certain amount of compensation for assembly position deviation.

[0023] Furthermore, in a specific implementation, the lower part of the planar template 1 provided in this embodiment of the present invention has a door hole 10 for discharging mud, and a sealing baffle 15 is detachably connected to the door hole 10. Specifically, the door hole 10 is used for discharging mud from the pile hole during concrete pouring. The sealing baffle 15 can be a steel plate structure with rubber edging, and is connected to the planar template 1 by wing bolts.

[0024] Furthermore, in a specific implementation, the aforementioned diagonal bracing assembly 3 provided in this embodiment of the present invention includes a diagonal bracing rod 31. One end of the diagonal bracing rod 31 is hinged to the planar template 1, and the other end of the diagonal bracing rod 31 is hinged to a connecting seat 32 fixed to the ground. Specifically, multiple diagonal bracing assemblies 3 arranged side by side can be provided on the same planar template 1. Each diagonal bracing assembly 3 can include multiple diagonal bracing rods 31, and the force application points of the multiple diagonal bracing rods 31 of the same diagonal bracing assembly 3 on the planar template 1 are located on the same vertical line. The connecting seat is fixed to the ground by long bolts.

[0025] Preferably, the diagonal brace 31 includes an inner rod 311 and an outer rod 312. The outer rod 312 is threaded to both ends of the inner rod 311 for adjusting the length of the diagonal brace 31. Specifically, the diagonal brace 31 adopts a double-ended reverse thread adjustment structure. The inner rod 311 is machined with left-hand and right-hand threads at both ends, and the outer rod 312 is fitted with a corresponding threaded sleeve. Rotating the inner rod 311 can achieve synchronous bidirectional extension and retraction, ensuring a symmetrical distribution of the supporting force during adjustment, adapting to changes in elevation in complex terrain, and improving the adaptability of the structure.

[0026] Furthermore, in a specific implementation, a sealing strip is provided between the planar template 1 and the corner piece 2 provided in this embodiment of the present invention. Specifically, the sealing strip can be made of EPDM rubber, which has good weather resistance and high elasticity, ensuring joint sealing and preventing grout leakage. At the same time, the sealing strip is installed using a dovetail groove for easy replacement.

[0027] Furthermore, in specific implementations, the inner surface of the planar template 1 provided in this embodiment of the invention is coated with an anti-stick coating. The anti-stick coating is made of modified polyurethane material, which reduces concrete adhesion, facilitates demolding, and improves the reusability of the template.

Claims

1. A formwork structure for a cantilever section of an anti-slide pile, comprising planar formwork (1), wherein adjacent planar formwork (1) are connected by corner pieces (2) to form a quadrangular tube, characterized in that, The outer side of the planar template (1) is connected to a diagonal bracing assembly (3), and the planar templates (1) arranged opposite to each other are connected by tie rods (4) for limiting the outward expansion of the planar templates (1). The tie rods (4) are arranged vertically and horizontally, and the corner piece (2) between adjacent planar templates (1) is connected by a side tie rod (5).

2. The anti-slide pile cantilever section formwork structure according to claim 1, characterized in that, The planar template (1) includes a panel (11) and a frame (12). Vertical ribs (13) are spaced apart on the panel (11). Back ribs (14) are horizontally connected to the vertical ribs (13). A first connecting hole for positioning and inserting the tie rod (4) is opened in the middle of the back rib (14). Second connecting holes for positioning and connecting the side tie rod (5) are opened obliquely on both sides of the back rib (14).

3. The anti-slide pile cantilever section formwork structure according to claim 2, characterized in that, The frame (12) is bolted to the corner piece (2), and the frame (12) has a number of strip holes spaced apart.

4. The anti-slide pile cantilever section formwork structure according to claim 1, characterized in that, The lower part of the flat template (1) is provided with a door hole (10) for discharging mud, and the door hole (10) is detachably connected to a sealing baffle (15).

5. The anti-slide pile cantilever section formwork structure according to claim 1, characterized in that, The diagonal bracing assembly (3) includes a diagonal bracing rod (31), one end of which is hinged to the planar template (1), and the other end of which is hinged to a connecting seat (32) fixed to the ground.

6. The anti-slide pile cantilever section formwork structure according to claim 5, characterized in that, The diagonal brace (31) includes an inner rod (311) and an outer rod (312). The outer rod (312) is threaded to both ends of the inner rod (311) to adjust the length of the diagonal brace (31).

7. The anti-slide pile cantilever section formwork structure according to claim 1, characterized in that, A sealing strip is provided between the flat template (1) and the corner piece (2).

8. The anti-slide pile cantilever section formwork structure according to claim 1, characterized in that, The inner surface of the planar template (1) is coated with an anti-stick coating.

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