Centrifugal sheet pile

Abstract

A centrifugal sheet pile comprises a pile body formed in a centrifugal mode, the pile body is provided with an upper top, a lower top, a left waist portion and a right waist portion, the upper top and the lower top are arranged in a vertically spaced mode, and the left waist portion and the right waist portion are arranged in a left-right spaced mode and located between the upper top and the lower top. The upper top, the lower top, the left waist portion and the right waist portion define a ring, a center through hole is formed in the middle of the pile body, the cross section of the center through hole is round or oval, upper flanges which protrude laterally and extend in the length direction of the pile body are arranged on the left side and the right side of the upper top, and lower flanges which protrude laterally and extend in the length direction of the pile body are arranged on the left side and the right side of the lower top. The outer ends of the upper flange and the lower flange are arc-shaped and are positioned on the same arc surface, the top surface of the upper top is provided with two top walls, the joint of the two top walls is arranged at an obtuse angle, the bottom surface of the lower top is provided with two bottom walls, and the joint of the two bottom walls is arranged at an obtuse angle. The pile body is formed in a centrifugal mode, and the integrity, the structural strength and the bending resistance of the pile body are better.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pile foundation engineering of all kinds of building structure system, especially relates to a centrifugal sheet pile. BACKGROUND

[0002] When all kinds of buildings are under construction, such as large underground buildings, slopes, tunnels, port wharf shore walls and river revetment, U-shaped sheet piles are needed to be used as enclosure. The U-shaped sheet pile includes a pile body, and the pile body is composed of a top, a waist part extending downward and left and right of the top, and a lower flange extending horizontally outward at the bottom of the two waist parts. To facilitate the splicing of the U-shaped sheet piles to form a protective wall, the side surface of one of the two lower flanges is provided with a protruding rib extending along the length direction of the lower flange, and the side surface of the other lower flange is provided with a slot extending along the length direction of the lower flange, and the protruding rib and the slot can be spliced by mutual insertion.

[0003] However, the U-shaped sheet pile is a single-sided structure, and the stress is concentrated at the junction of the top and the waist part, and the structural strength and bending resistance are insufficient. Moreover, the top end of the pile body has a small area, and the impact of the pile hammer is easy to cause cracks or corner damage at the top end of the pile body, which not only affects the appearance of the enclosure, but also affects the structural performance of the U-shaped sheet pile. Therefore, the existing technology, such as the Chinese utility model patent "Composite Pile Based on U-shaped Sheet Pile" with patent number ZL202321606239.4 (authorized publication number CN220246890U), forms a double U-shaped reinforced pile shape by combining two U-shaped sheet piles, forming a double-sided structure to avoid stress concentration at the junction of the top and the waist part, and greatly improving the structural strength and bending resistance.

[0004] Some existing sheet piles are formed by a centrifugal mold, and the centrifugal sheet pile is produced by a centrifugal machine. The centrifugal sheet pile has a hollow structure, good overall performance, good bending resistance parameters, and high bearing capacity. If the above-mentioned composite pile is formed by a centrifugal mold into a whole sheet pile, the structural strength and bending resistance of the composite pile can be further improved. However, due to the special structure of the centrifugal sheet pile, further improvement is needed for the structure of the above-mentioned composite pile to enable it to be produced by a centrifugal machine. SUMMARY

[0005] The utility model solves the technical problem of the above-mentioned existing technology, and provides a centrifugal sheet pile with reasonable structure and improved structural strength and bending resistance.

[0006] The utility model discloses a technical scheme that solves the above technical problems is adopted: this centrifugal sheet pile, including the pile body through the centrifugal mode forming, the pile body has upper top, lower top, left waist part and right waist part, upper top and lower top are arranged in the interval up and down, left waist part and right waist part are arranged in the interval left and right and are located between upper top and lower top, upper top, lower top, left waist part and right waist part enclose annular and form the center through -hole in the middle of the pile body, the cross section of center through -hole is round or oval, the left and right sides of upper top have the upper flange of lateral convex and along the length direction of the extension of the pile body, the left and right sides of lower top have the lower flange of lateral convex and along the length direction of the extension of the pile body, and it is characterized in that: the outer end of upper flange and lower flange is arc, the top surface of upper top has two top walls, and the junction of two top walls is arranged as an obtuse angle, the bottom surface of lower top has two bottom walls, and the junction of two bottom walls is arranged as an obtuse angle.

[0007] In order to make the adjacent centrifugal sheet pile of up and down can be connected quickly, preferably, the upper top and lower top of one end of the pile body are provided with a plurality of plug mechanisms, the upper top and lower top of the other end of the pile body are provided with the corresponding slot mechanisms of plug mechanism, each plug mechanism and the corresponding slot mechanism form a steel mechanical quick connector, so that the two pile bodies of up and down are connected together. One end of the centrifugal sheet pile is provided with a plug mechanism, and the other end is provided with a corresponding slot mechanism. The cooperation of the plug mechanism and the slot mechanism can form a steel mechanical quick connector. The steel mechanical quick connector is used to quickly plug the adjacent centrifugal sheet pile of up and down.

[0008] Further, the plug mechanism includes a plug, a first sleeve and a first prestressed steel bar. The first prestressed steel bar is fixed to one end of the first sleeve. The other end of the first sleeve is provided with the plug. The first sleeve and the first prestressed steel bar are embedded in the upper top or the lower top, so that the plug is exposed to the pile body. The plug of the plug mechanism is exposed to the pile body for plugging. The first sleeve and the first prestressed steel bar of the plug mechanism are embedded in the pile body, thereby enhancing the stability of the plug mechanism and making the plugging effect of the adjacent centrifugal sheet pile of up and down more stable.

[0009] Still further, the slot mechanism includes a second sleeve and a second prestressed steel bar. The second prestressed steel bar is fixed to one end of the second sleeve. The other end of the second sleeve is provided with a slot for inserting the plug. The plug and the slot cooperate to form a steel mechanical quick connector. The slot mechanism is embedded in the pile body as a whole. Therefore, the cooperation of the plug mechanism and the slot mechanism is more stable.

[0010] In order to enable the left and right adjacent centrifugal sheet piles to be quickly connected, preferably, the upper flange and the lower flange are spaced apart to form a lateral recess part extending along the length direction of the pile body, and a guide protrusion is formed in one of the lateral recess parts by centrifugal molding, the outer end of the guide protrusion is arc-shaped and located on the same arc surface as the outer end of the upper flange and the lower flange, and the protruding guide protrusion can be inserted into the lateral recess part of the adjacent other pile body to form a guide. The centrifugal sheet pile can be quickly inserted and connected with the left and right adjacent centrifugal sheet piles through the cooperation of the guide protrusion and the lateral recess part to form a protective wall, and the guide protrusion of the centrifugal sheet pile is in the lateral recess part, can form a support between the upper flange and the lower flange, thereby enhancing the stability of the upper flange and the lower flange and increasing the strength of the pile body.

[0011] As a scheme of the guide protrusion, preferably, a guide protrusion is formed in one of the lateral recess parts along the length direction of the pile body. The guide protrusion and the lateral recess part are formed by centrifugal molding, and the guide area of the guide protrusion is larger than that of the conventional protruding rib and slot insertion and connection guide on the lower flange. When the centrifugal sheet piles are connected to form a protective wall, the combination between the piles is better, the damage rate of the lower flange is reduced, and the surface area of mutual abutment is larger, so that the left and right adjacent two sheet piles can be connected flatly and stably.

[0012] As another scheme of the guide protrusion, preferably, a plurality of guide protrusions are arranged in one of the lateral recess parts in a spaced-apart manner, and a pouring hole penetrating in the up-down direction is formed in the guide protrusion. One centrifugal sheet pile is connected with the lateral recess part of the adjacent centrifugal sheet pile to form a protective wall. Since the guide protrusions are arranged in a spaced-apart manner, concrete can be poured into the space formed by the two opposite lateral recess parts through the pouring hole, so that a waterproof connection wall is formed. This connection wall is suitable for use as a foundation pit enclosure and a city pipe gallery. In addition, during pile driving, a high-pressure water pipe can be inserted into the pouring hole to impact high-pressure water while driving, which is more conducive to pile driving.

[0013] In order to facilitate the insertion of the guide protrusion into the lateral recess part, preferably, the cross section of the lateral recess part is large outside and small inside, and the cross section of the protruding guide protrusion is small outside and large inside. The guide protrusion with the small-outer-large-inner structure is matched with the lateral recess part with the large-outer-small-inner structure, so that the guide protrusion is more easily inserted into the lateral recess part.

[0014] Compared with the prior art, the centrifugal sheet pile has the following advantages:

[0015] 1. The pile body of the present application is formed by centrifugal molding. Compared with vibration molding, the pile body concrete formed by centrifugal molding is denser and has better integrity. It can also achieve better structural strength with less concrete consumption, thereby enhancing the structural strength and bending resistance of the pile body.

[0016] 2. The outer ends of the upper flange and the lower flange of the pile body are both arc-shaped. Therefore, the upper flange and the lower flange of the pile body can be formed by centrifugal means, and the upper top of the pile body has two top walls inclined at obtuse angles, and the lower top has two bottom walls inclined at obtuse angles. Therefore, the entire surface of the pile body has a certain curvature, the periphery of the pile body is not easily damaged, and the pile body with this cross-sectional shape is more conducive to centrifugal forming.

[0017] 3. The upper top, lower top, left waist and right waist of the pile body form a central through hole. After piling, the ground soil will enter the central through hole, which is conducive to piling and increases the firmness of the sheet pile inserted into the soil. After piling, the pile body is not easy to fall over. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of Example 1 of the utility model from another perspective;

[0020] Figure 3 This is a top view of the protective wall assembled from Example 1 of the utility model;

[0021] Figure 4 This is a schematic structural diagram of the plug mechanism in Example 1 of the present utility model;

[0022] Figure 5 This is a structural diagram of the slot mechanism in Example 1 of the present utility model;

[0023] Figure 6 This is a schematic structural diagram of Example 2 of the present utility model;

[0024] Figure 7 This is a schematic structural diagram of Example 2 of the present utility model from another perspective;

[0025] Figure 8 This is a top view of Example 2 of the utility model assembled into a protective wall. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-5 Shown is Example 1 of the present utility model.

[0028] likeFigures 1-3 As shown in the drawings, the centrifugal sheet pile of the present embodiment comprises a pile body 1 formed by centrifugal molding, the pile body 1 has an upper top 11, a lower top 12, a left waist 13 and a right waist 14, the upper top 11 and the lower top 12 are arranged vertically, the left waist 13 and the right waist 14 are arranged horizontally and located between the upper top 11 and the lower top 12, the upper top 11, the lower top 12, the left waist 13 and the right waist 14 form a ring shape and a central through hole 1a in the middle of the pile body 1, the cross section of the central through hole 1a is circular, the upper top 11 has an upper flange 15 protruding on both sides and extending along the length direction of the pile body 1, the lower top 12 has a lower flange 16 protruding on both sides and extending along the length direction of the pile body 1, the outer ends of the upper flange 15 and the lower flange 16 are arc-shaped and located on the same circular arc surface, the top surface of the upper top 11 has two top walls 111, the junction of the two top walls 111 is arranged at an obtuse angle, the bottom surface of the lower top 12 has two bottom walls 121, the junction of the two bottom walls 121 is arranged at an obtuse angle, therefore, the upper flange 15, the lower flange 16, the upper top 11 and the lower top 12 of the pile body 1 can be formed by centrifugal molding. In addition, the upper flange 15 and the lower flange 16 of the present embodiment are arranged at intervals to form a lateral groove part 1b extending along the length direction of the pile body 1, one of the lateral groove parts 1b is centrifugally molded with a guide protrusion 17, the guide protrusion 17 extends along the length direction of the pile body 1 in the lateral groove part 1b, the guide protrusion 17 protrudes from the lateral groove part 1b, the outer end of the guide protrusion 17 is arc-shaped and located on the same circular arc surface as the outer ends of the upper flange 15 and the lower flange 16, wherein the cross section of the lateral groove part 1b is outward large and inward small, the cross section of the guide protrusion 17 protruding from the lateral groove part 1b is outward small and inward large, the protruding guide protrusion 17 can be inserted into the lateral groove part 1b of the adjacent other pile body 1 without the guide protrusion 17 to form a guide, so that the left and right adjacent centrifugal sheet piles can be quickly inserted and matched to form a protective wall, the guide area of the guide protrusion 17 is large, therefore, the combination between the piles is better, so that the two centrifugal sheet piles can be smoothly and firmly spliced together.

[0029] As shown in the drawings, Figure 4 and Figure 5 the upper top 11 and the lower top 12 at the upper end of the pile body 1 of the present embodiment are provided with a plurality of plug mechanisms 2, the plug mechanisms 2 on the upper top 11 are symmetrically arranged with the plug mechanisms 2 on the lower top 12, the upper top 11 and the lower top 12 at the lower end of the pile body 1 are provided with a plurality of slot mechanisms 3 corresponding to the plug mechanisms 2, each plug mechanism 2 cooperates with the corresponding slot mechanism 3 to form a steel bar mechanical quick connector, so that the two pile bodies 1 above and below are connected together. As shown in the drawings, Figure 4As shown in the figure, the plug mechanism 2 of the steel bar mechanical quick connector comprises a plug 21, a first sleeve 22 and a first prestressed steel bar 23, the first prestressed steel bar 23 is fixed at one end of the first sleeve 22, the plug 21 is installed at the other end of the first sleeve 22, the first sleeve 22 and the first prestressed steel bar 23 are embedded in the upper top 11 or the lower top 12, and the plug 21 is exposed outside the pile body 1. Figure 5 As shown in the figure, the plug mechanism 2 of the steel bar mechanical quick connector comprises a plug 21, a first sleeve 22 and a first prestressed steel bar 23, the first prestressed steel bar 23 is fixed at one end of the first sleeve 22, the plug 21 is installed at the other end of the first sleeve 22, the first sleeve 22 and the first prestressed steel bar 23 are embedded in the upper top 11 or the lower top 12, and the plug 21 is exposed outside the pile body 1.

[0030] The upper wing 15, the lower wing 16, the upper top 11, the lower top 12, the guide protrusion 17 and the center through hole 1a are used in the embodiment, so that the structure of the pile body 1 can be formed by the centrifugal mode, the formed pile body 1 concrete is more compact, the integrity is better, and better structural strength can be obtained by using less concrete, so that the structural strength and the bending resistance of the centrifugal pile are enhanced.

[0031] As shown in the figure, Figures 6-8 The embodiment 2 of the utility model is shown in the figure.

[0032] As shown in the figure, Figures 6-8 The difference between the embodiment 2 and the embodiment 1 is that the guide protrusions 17 of the embodiment are arranged in multiple pieces and are spaced apart in the lateral groove part 1b, and the guide protrusions 17 are provided with the pouring holes 1c penetrating in the up-down direction. The centrifugal pile of the embodiment can also be formed by the centrifugal mode, the adjacent centrifugal piles are inserted and matched to form the protective wall through the guide protrusions 17 and the lateral groove parts 1b of the adjacent centrifugal piles, the guide protrusions 17 of the embodiment are arranged in multiple pieces and are spaced apart in the up-down direction, and therefore, the concrete can be poured into the space formed by the two opposite lateral groove parts 1b through the pouring holes 1c, so that the splicing wall is formed, which is suitable for being used as the foundation pit enclosure and the urban pipe gallery.

Claims

1. A centrifugal sheet pile, comprising a pile body (1) formed by centrifugal molding, the pile body (1) having an upper top portion (11), a lower top portion (12), a left waist portion (13) and a right waist portion (14), the upper top portion (11) and the lower top portion (12) being arranged in an up-down interval, the left waist portion (13) and the right waist portion (14) being arranged in a left-right interval and located between the upper top portion (11) and the lower top portion (12), the upper top portion (11), the lower top portion (12), the left waist portion (13) and the right waist portion (14) forming a ring shape and forming a central through hole (1a) in the middle of the pile body (1), the central through hole (1a) having a circular or elliptical cross section, the upper top portion (11) having an upper flange (15) protruding on both sides thereof and extending along the length direction of the pile body (1), the lower top portion (12) having a lower flange (16) protruding on both sides thereof and extending along the length direction of the pile body (1), characterized in that: The outer end of the upper flange (15) and the lower flange (16) is arc-shaped, the top surface of the upper top (11) has two top walls (111), the junction of the two top walls (111) is arranged at an obtuse angle, the bottom surface of the lower top (12) has two bottom walls (121), and the junction of the two bottom walls (121) is arranged at an obtuse angle.

2. The centrifuge sheet pile according to claim 1, characterized in that: A plurality of plug mechanisms (2) are arranged on the upper top (11) and the lower top (12) of one end of the pile body (1), plug slot mechanisms (3) corresponding to the plug mechanisms (2) are arranged on the upper top (11) and the lower top (12) of the other end of the pile body (1), each plug mechanism (2) and the corresponding plug slot mechanism (3) form a steel bar mechanical quick connector, and the upper and lower two adjacent pile bodies (1) are connected together.

3. The centrifuge sheet pile of claim 2, wherein: The plug mechanism (2) comprises a plug (21), a first sleeve (22) and a first prestressed steel bar (23), the first prestressed steel bar (23) is fixed at one end of the first sleeve (22), the other end of the first sleeve (22) is provided with the plug (21), and the first sleeve (22) and the first prestressed steel bar (23) are embedded in the upper top (11) or the lower top (12), so that the plug (21) is exposed outside the pile body (1).

4. The centrifuge sheet pile according to claim 3, wherein: The plug slot mechanism (3) comprises a second sleeve (31) and a second prestressed steel bar (32), the second prestressed steel bar (32) is fixed at one end of the second sleeve (31), the other end of the second sleeve (31) is provided with a plug slot for inserting the plug (21), and the plug (21) and the plug slot are matched to form the steel bar mechanical quick connector.

5. The centrifuge sheet pile of claim 1, wherein: The upper flange (15) and the lower flange (16) are arranged at intervals to form a lateral groove part (1b) extending along the length direction of the pile body (1), a guide protrusion (17) is formed by centrifugal molding in one of the lateral groove parts (1b), the guide protrusion (17) protrudes from the lateral groove part (1b), the outer end of the guide protrusion (17) is arc-shaped and located on the same arc surface as the outer end of the upper flange (15) and the lower flange (16), and the protruding guide protrusion (17) can be inserted into the lateral groove part (1b) of the other pile body (1) without the guide protrusion (17) to form a guide.

6. The centrifuge sheet pile of claim 5, wherein: One of the lateral groove parts (1b) has a guide protrusion (17) extending along the length direction of the pile body (1).

7. The centrifuge sheet pile of claim 5, wherein: One of the lateral groove parts (1b) has a plurality of guide protrusions (17) arranged at intervals in the up-down direction, and a pouring hole (1c) penetrating through the guide protrusions (17) in the up-down direction is formed in the guide protrusions (17).

8. A centrifuged sheet pile according to any one of claims 5-7, characterized in that: The lateral groove part (1b) has a cross section in the shape of large outside and small inside, and the guide protrusion (17) protruding from the lateral groove part (1b) has a cross section in the shape of small outside and large inside.

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