Anti-sliding support pile
Through variable cross-section design and nested steel cage structure anti-slip support piles, the existing anti-slip piles have been solved, and the cost-saving and effective anti-slip effect is achieved, and the anti-slip and stability of the pile body is enhanced.
Patent Information
- Application Number
- CN202422415102.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-30
AI Technical Summary
When existing anti-sliding piles improve the anti-sliding effect by increasing the anti-sliding effect, the cost of raw materials and construction difficulties are increased, making it difficult to effectively prevent landslide damage while saving costs.
Anti-slip support piles with variable cross-section design are adopted. The middle cross-section of the pile body is large and the cross-section of both ends is small. Combined with the nested steel cage structure, the middle is reinforced by a quadrangular steel cage, and the end is non-equidogonal octagonal design to reduce material use at the end and improve stability.
It achieves the improvement of anti-slip effect while reducing raw material costs and construction difficulty, and enhances the anti-slip ability and use stability of the pile body.
Smart Images
Figure CN223135118U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of pile structures in civil engineering, and particularly to an anti-slide retaining pile. Background Art
[0002] In landslide geology, the landslide mass is unstable on the slope, and there is a sliding surface in the soft formation, which poses a potential danger to the project. The common protection plan is to construct anti-slide piles, and anti-slide piles can effectively prevent the harm of the landslide mass.
[0003] Currently, the main type of anti-slide piles is single large-diameter reinforced concrete piles. By increasing the length and thickness of the anti-slide piles, the overall strength and stress-bearing capacity of the pile body are improved, thereby enhancing the anti-slide effect. However, this will undoubtedly increase the raw material cost and construction difficulty. Therefore, it is very necessary to study an anti-slide pile that can not only effectively resist sliding, but also save raw materials and has low construction difficulty, which will have important application value in the treatment of landslide geology. Utility Model Content
[0004] In order to improve the defect that the existing anti-slide piles increase the raw material cost and construction difficulty by increasing the height and thickness to enhance the anti-slide effect, this application provides an anti-slide retaining pile, which has the effects of effectively resisting sliding, saving raw material cost, and reducing construction difficulty.
[0005] In order to achieve the purpose of this application, an anti-slide retaining pile provided by this application adopts the following technical solutions:
[0006] An anti-slide retaining pile includes a pile body and a steel reinforcement cage. The steel reinforcement cage is cast in the pile body. The pile body includes an end part and a middle part. The end parts are connected to both axial ends of the middle part. The cross-section of the end part is a polygon with the number of sides equal to 4n, where n is an integer of 2 or more. The cross-section of the middle part is a rectangle, and the orthographic projection of the end part is located in the orthographic projection of the middle part.
[0007] During the actual working process of the anti-slide retaining pile, the shear force and bending moment received are in a parabolic-like distribution state with a large value in the middle and small values at the top and bottom. The anti-slide retaining pile of this application adopts a variable cross-section design to adapt to the actual stress of the anti-slide retaining pile. A square pile with a large cross-sectional area is used in the middle part where the shear force and bending moment are large to ensure the strength of the pile body and play an effective anti-slide role. At the two end parts where the shear force and bending moment are relatively small, a pile with a polygonal cross-section is used, which can not only meet the strength requirements at both ends of the anti-slide pile, but also reduce the material used at both ends of the pile, save unnecessary costs. At the same time, compared with the middle part with a rectangular cross-section, the cross-sectional area of the end part with a polygonal cross-section is reduced, reducing the end resistance and the overall weight of the pile body, and reducing the construction difficulty.
[0008] Further, the cross-section of the end part is an octagon.
[0009] Further, the octagon includes a first side and a second side, the first side and the second side are alternately connected end to end to form the octagon, the length of the first side is not equal to the length of the second side, and the second side coincides with two symmetric sides of the rectangle.
[0010] In another embodiment, the octagon includes a first side and a second side, the first side and the second side are alternately connected end to end to form the octagon, the length of the first side is not equal to the length of the second side, and the second side coincides with the four sides of the rectangle.
[0011] The present application further preferably adopts the shape of an octagon, so that the end cross-section is a non-regular octagon. Compared with a regular octagon, for the end of the non-regular octagon cross-section of the present application, since the lengths of two adjacent sides are not equal, it is more difficult for the pile body to rotate along its circumferential direction, and the construction and use stability are higher.
[0012] Further, the steel reinforcement cage includes an octagonal prism steel reinforcement cage matching the outer shape of the end portion and a quadrangular prism steel reinforcement cage matching the outer shape of the middle portion, and the quadrangular prism steel reinforcement cage is nested and fixed outside the octagonal prism steel reinforcement cage.
[0013] The present application adopts the structure of a nested steel reinforcement cage. Compared with the traditional steel reinforcement cage, the present application further uses a quadrangular prism-shaped steel reinforcement cage to strengthen in the middle where the requirements for shear force and bending moment are higher, which helps to improve the strength and stress-bearing capacity of the middle part of the pile body, thereby enhancing the anti-sliding effect of the anti-sliding support pile.
[0014] Further, the end portion includes a first body segment and a second body segment, the first body segment is coaxially connected to one end of the middle portion in the axial direction, and the second body segment is coaxially connected to the other end of the middle portion in the axial direction.
[0015] Further, the sum of the lengths of the first body segment and the second body segment is greater than or equal to the length of the middle portion, and the length of the middle portion accounts for 20% or more of the total length of the pile body.
[0016] According to the force analysis during the use of the anti-sliding support pile, design the most suitable length ratio of the end portion and the middle portion to ensure that the pile body has good anti-sliding performance, saves raw material costs, and reduces the construction difficulty.
[0017] Further, the lengths of the first body segment and the second body segment are equal or unequal.
[0018] In one embodiment, the lengths of the first body segment and the second body segment may be equal. In another embodiment, the lengths of the first body segment and the second body segment may be unequal. The height of the upper-middle part of the anti-slide pile with unequal first and second body segments is different from that of the anti-slide pile with equal lengths of the first and second body segments, and the height that can be exposed at the upper end after installation is also different. In actual use, it is possible to determine which of the first body segment and the second body segment is driven downward and the driving depth according to the actual working conditions such as the slope of the landslide body and the water surface height.
[0019] Further, a groove is provided on the outer wall of at least one of the ends, and the groove extends along the axial direction of the end.
[0020] Through the arrangement of the groove, the cross-sectional area of the end can be further reduced, thereby further reducing the end resistance during the use of the anti-slide pile and reducing the construction difficulty. At the same time, when the anti-slide retaining piles of the present application are spliced and used, the grooves of the two anti-slide retaining piles can be spliced to form a perfusion hole, and the connection stability between the spliced anti-slide retaining piles can be improved through perfusion.
[0021] In summary, the present application provides one with the following technical effects:
[0022] First, the anti-slide retaining pile of the present application adopts a variable cross-section structure design. The volume and cross-sectional area of the pile body are distributed with a large middle and small ends, making the middle part show a stronger anti-slide effect relative to the two ends. The overall shape and structural design are very consistent with the stress conditions during the use of the anti-slide pile, and good use effects are achieved in several important aspects such as anti-slide, saving raw material costs, and reducing construction difficulty.
[0023] Second, the present application further adopts two groups of steel reinforcement cages nested on the traditional steel reinforcement cage structure. The use of a quadrangular prism-shaped steel reinforcement cage further plays a strengthening and supporting role in the middle of the octagonal prism-shaped steel reinforcement cage, and specifically improves the compressive, shear, and bending resistance capabilities of the middle section of the anti-slide pile.
[0024] Third, the present application improves the shapes of the two ends of the anti-slide retaining pile, adopts a non-equilateral octagon, reduces the possibility of circumferential rotation during the driving and use of the anti-slide retaining pile, and improves the use stability of the anti-slide retaining pile. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the overall structure of the anti-slide retaining pile of Embodiment 1 of the present application.
[0026] Figure 2 It is a schematic top view structure diagram of the anti-slide retaining pile of Embodiment 1 of the present application.
[0027] Figure 3 It is a schematic diagram of the split structure of the steel reinforcement cage inside the anti-slide retaining pile of Embodiment 1 of the present application, where the dashed line represents the assembly line.
[0028] Figure 4 This is a top view structural schematic diagram of the steel cage assembled inside the anti-sliding retaining pile in Embodiment 1 of the present application.
[0029] Figure 5 This is a sectional structural schematic diagram of the anti-sliding retaining pile in Embodiment 1 of the present application in the use state in landslide geology.
[0030] Figure 6 This is a sectional structural schematic diagram of the anti-sliding retaining pile in Embodiment 1 of the present application in the use state in another landslide geology.
[0031] Figure 7 This is a schematic diagram of the continuous splicing use of the anti-sliding retaining pile in Embodiment 1 of the present application.
[0032] Figure 8 This is an overall structural schematic diagram of the anti-sliding retaining pile in Embodiment 2 of the present application.
[0033] Figure 9 This is an overall structural schematic diagram of another anti-sliding retaining pile in Embodiment 2 of the present application.
[0034] Reference numerals: 1, pile body; 11, end; 111, first body segment; 112, second body segment; 12, middle part; 13, groove; 2, steel cage; 21, octagonal prism steel cage; 22, quadrangular prism steel cage; 3, sliding soil layer; 4, rock layer or soil layer; 51, sliding surface; 52, rupture surface; 6, ground; 7, water surface; 8, riverbed; 9, splicing joint. Detailed implementation manners
[0035] To make the objectives and technical solutions of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The directional terms mentioned in the following implementation manners, such as: up, down, left, right, front, back, bottom, top, etc., are only references to the directions of the attached drawings. Therefore, the directional terms used are for illustration purposes and do not limit the present application.
[0036] Embodiment 1
[0037] This embodiment discloses an anti-sliding retaining pile, hereinafter referred to as a retaining pile, with reference to Figure 1, including a pile body 1 and a steel reinforcement cage 2 (not shown in the figure), can be a reinforced concrete hollow pile formed by pouring a pile body 1 made of concrete material outside the steel reinforcement cage 2. The pile body 1 includes an integrally formed end portion 11 and a middle portion 12. The end portion 11 and the middle portion 12 are coaxially arranged at both axial ends of the middle portion 12. The end portion 11 includes a first body segment 111 and a second body segment 112. One axial end of the middle portion 12 is the first body segment 111, and the other axial end is the second body segment 112. The sum of the lengths of the first body segment 111 and the second body segment 112 is greater than or equal to the length of the middle portion 12, and the length of the middle portion 12 accounts for 20% or more of the total length of the pile body 1 to ensure the anti-sliding performance of the pile body 1. The lengths of the first body segment 111 and the second body segment 112 can be equal or unequal. In this embodiment, the length of the first body segment 111 is less than or equal to the length of the second body segment 112. When the length of the first body segment 111 is less than the length of the second body segment 112, during installation, the shorter first body segment 111 can be constructed downward or the longer second body segment 112 can be constructed downward according to the actual working conditions to achieve different use effects, with higher adaptability.
[0038] Referring to Figure 2 , the cross-sections of the first body segment 111 and the second body segment 112 are the same octagon, and the cross-section of the middle portion 12 is a rectangle. The rectangle can be a square or a rectangle. In this embodiment Figure 2 shows that the cross-section of the middle portion 12 of the anti-sliding pile is a square, but this is not necessary. The octagon of the cross-sections of the first body segment 111 and the second body segment 112 includes a first side L1 and a second side L2. The first side L1 and the second side L2 are alternately connected end to end to form the octagon. The four second sides L2 respectively coincide with the four sides of the rectangle. That is to say, in the top view of the pile body 1, the octagon is located within the rectangle, and the area of the octagon is smaller than the area of the rectangle. More preferably, the lengths of the first side L1 and the second side L2 are unequal. In this embodiment, the length of the first side L1 is less than the length of the second side L2, but this is not necessary. In some other embodiments, the length of the first side L1 can also be greater than the length of the second side L2. As long as the lengths of the first side L1 and the second side L2 are unequal, the anti-sliding pile of the present application can achieve the effect of not easily rotating along its axis.
[0039] Referring to Figure 3 and Figure 4, the steel reinforcement cage 2 cast in the pile body 1 includes an octagonal prism steel reinforcement cage 21 and a quadrangular prism steel reinforcement cage 22. The length of the octagonal prism steel reinforcement cage 21 is equal to the total length of the pile body 1 or slightly longer than the total length of the pile body 1. The cross-sectional shape of the octagonal prism steel reinforcement cage 21 matches the shape of the octagon at the end 11. The length of the quadrangular prism steel reinforcement cage 22 is equal to the length of the middle part 12 or slightly longer than the length of the middle part 12. The cross-sectional shape of the quadrangular prism steel reinforcement cage 22 matches the rectangular shape of the middle part 12. The quadrangular prism steel reinforcement cage 22 is sleeved and fixed outside the octagonal prism steel reinforcement cage 21 and is located in the middle position of the octagonal prism steel reinforcement cage 21. That is to say, the quadrangular prism steel reinforcement cage 22 is located at the middle part 12 of the pile body 1. The fixing method of the quadrangular prism steel reinforcement cage 22 and the octagonal prism steel reinforcement cage 21 is not limited. It can be welding or bundling together with steel wires for fixing. The quadrangular prism steel reinforcement cage 22 is fixed in the way that it is concentric with the middle part 12 according to the position of the middle part 12 on the pile body 1, so that the quadrangular prism steel reinforcement cage 22 is exactly located at the position of the middle part 12, playing a strengthening role for the middle part 12.
[0040] When treating landslide geology, the pile body 1 near the slip surface 51 is subjected to the maximum bending moment and shear force. Along the slip surface 51 upward and downward, the bending moment and shear force gradually decrease. Refer to Figure 5 , when the anti-slide pile of the present application treats landslide geology that is not close to water, it penetrates below the ground 6. The upper part of the middle part 12 is in the sliding soil layer 3, and the lower part is located in the relatively stable rock layer or soil layer 4, so that the slip surface 51 passes through a position close to the middle of the middle part 12, so that the middle part 12 is located in the area where the bending moment and shear force of the entire pile body 1 are the largest, playing a main anti-slide role. Refer to Figure 6 , the anti-slide pile of the present application can also be used to treat landslide geology close to water. During installation, the upper part of the middle part 12 is in the sliding soil layer 3, and the lower part is located in the relatively stable rock layer or soil layer 4, so that the rupture surface 52 and the riverbed 8 pass through a position close to the middle of the middle part 12, so that the middle part 12 bears the maximum bending moment and shear force, playing a main anti-slide role. Among them, the upper half of the first body segment 111 can be exposed above the water surface 7 and the ground 6, and at the same time play the role of a bank protection pile. Although Figure 5 and Figure 6 show that the anti-slide pile has the shorter first body segment 111 on the upper part and the longer second body segment 112 on the lower part, but this installation method is not fixed. During actual installation, it can be selected according to the actual working conditions such as the thickness of the sliding soil layer 3 that the first body segment 111 faces downward or the second body segment 112 faces downward.
[0041] Refer to Figure 7 , the anti-slide pile of the embodiment of the present application when treating landslide geology with water inflow, for example Figure 6When used on the river bank as shown, the anti-slide piles can be spliced and used continuously. A relatively large plane will be formed at the splicing joint 9 between two adjacent anti-slide support piles, and this splicing joint 9 can be used as a life-saving step.
[0042] Embodiment 2
[0043] Referring to Figure 8 , on the outer walls of the first body section 111 and the second body section 112, grooves 13 are axially formed along the pile body 1. The cross-section of the groove 13 is semi-circular, and the grooves 13 on the first body section 111 and the second body section do not extend towards the middle 12. It can be that the grooves 13 are formed on eight surfaces on the sides of the first body section 111 and the second body section 112 respectively. Referring to Figure 9 , in some other embodiments, it can also be that the grooves 13 are formed on some opposite side surfaces of the first body section 111 and the second body section 112 respectively.
Claims
1. An anti-slip retaining pile, comprising a pile body and a steel reinforcement cage, wherein the steel reinforcement cage is cast in the pile body, and is characterized in that, The pile body includes an end portion and a middle portion. The end portion is connected to both axial ends of the middle portion. The cross-section of the end portion is a polygon with the number of sides equal to 4n, where n is an integer of 2 or more. The cross-section of the middle portion is a rectangle. The orthographic projection of the end portion is located within the orthographic projection of the middle portion.
2. The anti-slip retaining pile according to claim 1, characterized in that, The cross-section of the end portion is an octagon.
3. The anti-slip retaining pile according to claim 2, characterized in that, The octagon includes a first side and a second side. The first side and the second side are alternately connected end to end to form the octagon. The length of the first side is not equal to the length of the second side. The second side coincides with two symmetric sides of the rectangle.
4. The anti-slip retaining pile according to claim 2, characterized in that, The octagon includes a first side and a second side. The first side and the second side are alternately connected end to end to form the octagon. The length of the first side is not equal to the length of the second side. The second side coincides with the four sides of the rectangle.
5. A anti-slip retaining pile according to claim 3 or 4, characterized in that, The steel reinforcement cage includes an octagonal steel reinforcement cage that matches the outer shape of the end portion and a quadrangular prism steel reinforcement cage that matches the outer shape of the middle portion. The quadrangular prism steel reinforcement cage is nested and fixed outside the octagonal steel reinforcement cage.
6. The anti-slip retaining pile according to claim 5, characterized in that, The end portion includes a first body segment and a second body segment. The first body segment is coaxially connected to one axial end of the middle portion, and the second body segment is coaxially connected to the other axial end of the middle portion.
7. The anti-slip retaining pile according to claim 6, characterized in that, The sum of the lengths of the first body segment and the second body segment is greater than or equal to the length of the middle portion, and the length of the middle portion accounts for 20% or more of the total length of the pile body.
8. The anti-slip retaining pile according to claim 7, wherein, The lengths of the first body segment and the second body segment are equal or unequal.
9. The anti-slip retaining pile according to claim 5, characterized in that, At least one outer wall of the end portion is provided with a groove, and the groove extends along the axial direction of the end portion.