Sectional type concrete precast pile

Abstract

The utility model relates to the technical field of precast piles, in particular to a sectional type concrete precast pile which comprises a pile body, the pile body comprises an upper section part and a lower section part, the upper section part and the lower section part are integrally formed, and the area of the cross section of the upper section part is larger than that of the cross section of the lower section part. And a reinforcement cage for improving the structural strength of the pile body is arranged in the pile body. The upper section part and the lower section part are arranged, the cross section area of the lower section part is smaller than that of the upper section part, on the premise that the basic load performance of the pile body is not affected, material consumption of the lower section part is reduced, and the effect of reducing overall material consumption of the pile body is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of precast piles, in particular to a sectional concrete precast pile. BACKGROUND

[0002] The precast pile refers to a concrete precast pile, and is suitable for foundation treatment of silt, silt soil, cohesive soil, silt, sandy soil and artificial fill.

[0003] A precast pile with a pile cap is disclosed in Chinese Patent No. CN219118128U, which comprises a pile body and a pile cap arranged at the top end of the pile body. A prestressed steel reinforcement cage and an anchoring steel reinforcement cage are pre-buried in the pile body. One end of the prestressed steel reinforcement cage is flush with the top end of the pile body. The anchoring steel reinforcement cage is connected to the prestressed steel reinforcement cage. The anchoring steel reinforcement cage extends out of the center position of the top end of the pile body. A through hole is formed in the pile cap. The pile cap is connected to the prestressed steel reinforcement cage through bolts.

[0004] For the related technology in the above, it is well known that when the precast pile is loaded in the soil layer, the upper segment (close to the pile cap) of the pile body has a greater load than the lower half. In the prior art, the cross-sectional area of each position in the length direction of the pile body is consistent. When the upper segment of the pile body meets the load requirement, the lower segment will have an excess of bearing capacity, which increases unnecessary material consumption of the pile body.

[0005] APPLICATION CONTENT

[0006] In order to reduce the consumption of pile body materials, the application provides a sectional concrete precast pile.

[0007] The application provides a sectional concrete precast pile using the following technical solution:

[0008] A sectional concrete precast pile comprises a pile body, wherein the pile body comprises an upper segment and a lower segment, the upper segment and the lower segment are integrally formed, the cross-sectional area of the upper segment is greater than that of the lower segment, and a steel reinforcement cage for improving the structural strength of the pile body is arranged in the pile body.

[0009] By using the above technical solution, the cross-sectional area of the upper segment is greater than that of the lower segment. Compared with the prior art, on the one hand, the upper segment meets the basic performance of the load pile cap, and on the other hand, the material of the lower segment with excess load performance is reduced. Without affecting the overall bearing capacity of the precast pile, the material consumption of the entire pile body is reduced.

[0010] Optionally, the upper segment and the lower segment are transitioned through a slope.

[0011] When the pile body enters the soil layer, the bottom end of the upper section part abuts against the soil layer, which increases the resistance of the pile body entering the soil layer.

[0012] Optionally, the lower section part is connected with a plurality of pull-out resistant rings, the bottom wall of the pull-out resistant ring is provided with a guide ring surface, the top end of the pull-out resistant ring is provided with an opening, and the side wall of the pull-out resistant ring is provided with a plurality of soil passing holes.

[0013] By adopting the above technical scheme, the pull-out resistance of the pile body almost completely depends on the friction force between the pile body and the soil layer. The pull-out resistant ring is used to increase the contact area between the lower section part and the soil layer. When the pile body enters the soil layer, the pull-out resistant ring is filled with soil through the soil passing holes and the top end, and is in communication with the external soil layer through the soil passing holes, thereby increasing the contact area between the pile body and the soil layer and further improving the pull-out resistance of the pile body.

[0014] Optionally, the pull-out resistant ring is connected with a plurality of fixed rib plates.

[0015] By adopting the above technical scheme, the pull-out resistant ring is extruded by the soil around it when it is in the soil layer, and there is a possibility of deformation and damage, which affects the pull-out performance of the pile body. By providing the fixed rib plates, the structural strength of the pull-out resistant ring is improved, the possibility of stress deformation of the pull-out resistant ring is reduced, and the pull-out resistance of the pile body is ensured.

[0016] Optionally, the pile body is a cylindrical pipe pile, and the pile body is made of high-strength concrete material.

[0017] By adopting the above technical scheme, the cylindrical pipe pile is arranged to have a larger cross-sectional area of the upper section part than that of the lower section part, and is made of high-strength concrete material, which ensures that the cylindrical pipe pile can still maintain the structural strength required by the pile body under the condition that the middle part is hollow, and achieves the purpose of saving materials for the cylindrical pipe pile.

[0018] Optionally, the upper section part is connected with a plurality of connecting strips, the plurality of connecting strips are evenly distributed around the axis of the pile body in a circumferential direction, the connecting strips are parallel to the upper section part, and the bottom end of the connecting strips is provided with an inverted bevel.

[0019] By adopting the above technical scheme, the cross section of the cylindrical pipe pile is circular. During the settlement of the soil layer, different parts of the soil layer do not settle uniformly, which leads to different stress conditions of different parts of the pile body, and there is a possibility of torsion of the pile body. By providing the connecting strips, the contact area between the upper section part and the soil layer is increased, and the possibility of torsion of the pile body is reduced.

[0020] Optionally, the pile body is a solid square pile.

[0021] By adopting the technical scheme, the solid square pile can bear larger load and adapt to complex mechanical environment. The solid square pile is provided with the upper section and the lower section, so that the material consumption of the pile body is saved under the premise of ensuring the basic load performance.

[0022] Optionally, the reinforcement cage comprises upper section reinforcement, upper section ring reinforcement, through length reinforcement and lower section ring reinforcement, the upper section reinforcement and the through length reinforcement are each prefabricated with a plurality of reinforcement rods in the pile body, the upper section reinforcement is located in the upper section, the through length reinforcement is located between the upper section and the lower section, the upper section ring reinforcement is connected with a plurality of reinforcement rods on the upper section reinforcement, the lower section ring reinforcement is connected with a plurality of reinforcement rods on the through length reinforcement, and a plurality of connecting reinforcement rods are connected between the upper section ring reinforcement and the lower section ring reinforcement.

[0023] By adopting the technical scheme, the upper section and the lower section are effectively combined and concentrated in force by the upper section reinforcement, the upper section ring reinforcement, the through length reinforcement and the lower section ring reinforcement, so that the possibility of damage of the pile body due to local force is reduced.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. By the upper section cross-sectional area being larger than the lower section cross-sectional area, compared with the prior art, on the one hand, the upper section meets the basic performance of the load bearing platform, and on the other hand, the material of the lower section which overflows the load performance is reduced, so that the material consumption of the entire pile body is reduced under the premise of not affecting the overall load bearing performance of the prefabricated pile;

[0026] 2. The anti-pulling ring is used to increase the contact area between the lower section and the soil layer. When the pile body enters the inside of the soil layer, the anti-pulling ring is filled with soil inside through the soil hole and the top end, and is in communication with the external soil layer through the soil hole, so that the contact area between the pile body and the soil layer is increased, and the anti-pulling force of the pile body is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the sectional type concrete prefabricated pile in embodiment 1 of the present application.

[0028] Figure 2 is Figure 1 is an enlarged view of A in

[0029] Figure 3 is a schematic diagram of the structure of the reinforcement cage in embodiment 1 of the present application.

[0030] Figure 4 is a schematic diagram of the overall structure of the prefabricated pile in embodiment 2 of the present application.

[0031] Figure 5 is a schematic diagram of the structure of the reinforcement cage in embodiment 2 of the present application.

[0032] Explanation of reference signs: 1, pile body; 11, upper section; 111, connecting strip; 12, lower section; 2, anti-pulling ring; 21, guide ring surface; 22, soil passage hole; 23, fixed rib plate; 3, steel reinforcement cage; 31, upper section reinforcement; 32, upper section ring reinforcement; 33, through-length reinforcement; 34, lower section ring reinforcement; 35, connecting reinforcement. DETAILED DESCRIPTION

[0033] The following will be described in detail with reference to the accompanying drawings Figures 1-5 The present application is further described in detail.

[0034] Embodiment 1 of the present application discloses a segmented concrete precast pile. Referring to Figure 1 , the segmented concrete precast pile comprises a pile body 1, the pile body 1 is a cylindrical pipe pile, and the pile body 1 is made of high-strength concrete material. The pile body 1 comprises an upper section 11 and a lower section 12, and the cross-sectional area of the upper section 11 is greater than that of the lower section 12. The upper section 11 and the lower section 12 are transitioned by an inclined surface.

[0035] Referring to Figure 1 , a plurality of connecting strips 111 are fixedly connected to the upper section 11, the plurality of connecting strips 111 are uniformly distributed around the axis of the pile body 1, the connecting strips 111 coincide with the radial direction of the pile body 1, and the bottom end of the connecting strips 111 is provided with an inclined angle. The connecting strips 111 are used to increase the friction between the pile body 1 and the soil layer and improve the torsional moment of the pile body 1.

[0036] Referring to Figure 1 and Figure 2 , the lower section 12 is fixedly connected with an anti-pulling ring 2, the bottom wall of the anti-pulling ring 2 is provided with a guide ring surface 21, and the guide ring surface 21 is used to guide the soil layer. The top end of the anti-pulling ring 2 is open, and a plurality of soil passage holes 22 are opened on the side wall of the anti-pulling ring 2. A plurality of fixed rib plates 23 are fixedly connected to the inner side wall of the anti-pulling ring 2, and the fixed rib plates 23 are used to improve the structural strength of the anti-pulling ring 2. By providing the anti-pulling ring 2, the soil passes through the top end of the anti-pulling ring 2 and the soil passage holes 22, which increases the contact area between the pile body 1 and the soil layer and improves the anti-pulling performance of the pile body 1.

[0037] Referring to Figure 1 and Figure 3 , a steel reinforcement cage 3 is precast in the pile body 1, and the steel reinforcement cage 3 comprises upper section reinforcement 31, upper section ring reinforcement 32, through-length reinforcement 33, and lower section ring reinforcement 34. A plurality of upper section reinforcement 31 and upper section ring reinforcement 32 are arranged in the upper section 11, and the upper section reinforcement 31 and the upper section ring reinforcement 32 are welded. A plurality of through-length reinforcement 33 and lower section ring reinforcement 34 are arranged between the upper section 11 and the lower section 12, and the through-length reinforcement 33 and the lower section ring reinforcement 34 are welded. A plurality of connecting reinforcement 35 are welded between the upper section ring reinforcement 32 and the lower section ring reinforcement 34.

[0038] By prefabricating the upper segment rib 31 and the upper segment ring rib 32 in the upper segment part 11, the structural strength of the upper segment part 11 is ensured, the through rib 33 and the lower segment ring rib 34 are arranged between the upper segment part 11 and the lower segment part 12 to ensure the overall structural strength of the pile body 1, and the connecting rib 35 is used to combine the upper segment rib 31 and the through rib 33 into the steel reinforcement cage 3 to ensure the overall structural strength of the pile body 1.

[0039] The embodiment 1 of the application is to prefabricate the steel reinforcement cage 3 in the pile body 1 to ensure the structural strength, and then install the pull-out resistant ring 2 on the surface of the lower segment part 12. During construction, the pile body 1 is in the soil layer, the soil fills the inside of the pull-out resistant ring 2 and communicates with the external soil.

[0040] By making the cross-sectional area of the upper segment part 11 larger than that of the lower segment part 12, compared with the prior art, on the one hand, the upper segment part 11 meets the basic performance of the load bearing platform, and on the other hand, the material of the lower segment part 12 which exceeds the load performance is reduced, thereby reducing the material consumption of the entire pile body 1 without affecting the overall load bearing performance of the prefabricated pile.

[0041] Embodiment 2: The difference between this embodiment and the embodiment 1 is that the cross-sectional shape of the pile body 1 is different.

[0042] Referring to Figure 4 and Figure 5 , the pile body 1 is a solid square pile. Due to the shape characteristics, the solid square pile effectively improves the anti-torque force of the pile body 1 and can be applied to situations with high load requirements and complex mechanical environments, and the consumption of concrete material of the solid square pile is reduced during the production of the solid square pile. The steel reinforcement cage 3 is arranged to adapt to the shape of the solid square pile.

[0043] The above are the preferred embodiments of the application, and are not intended to limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application shall be covered within the protection scope of the application.

Claims

1. A segmental concrete precast pile, characterized by: The utility model provides a pile body (1), the pile body (1) includes upper section (11) and lower section (12), upper section (11) and lower section (12) are integrally formed, the area of the cross section of upper section (11) is greater than the area of the cross section of lower section (12), the reinforcing cage (3) that improves the structural strength of the pile body (1) is arranged in the pile body (1).

2. The segmental concrete precast pile according to claim 1, characterized in that: The upper section (11) and the lower section (12) are transitioned by a slope.

3. The segmental concrete precast pile according to claim 1, characterized in that: The lower section (12) is connected with a plurality of anti-pulling rings (2), the bottom wall of the anti-pulling ring (2) is provided with a guide ring surface (21), the top end opening of the anti-pulling ring (2) is provided, and a plurality of soil holes (22) are opened in the sidewall of the anti-pulling ring (2).

4. The segmental concrete precast pile according to claim 3, characterized in that: The anti-pulling ring (2) is connected with a plurality of fixed rib plates (23).

5. The segmental concrete precast pile according to claim 1, characterized in that: The pile body (1) is a cylindrical pipe pile, and the pile body (1) is formed by pouring high-strength concrete material.

6. The segmental concrete precast pile according to claim 5, characterized in that: The upper section (11) is connected with a plurality of connecting strips (111), the connecting strips (111) are uniformly distributed around the axis of the pile body (1) in a circumferential direction, the connecting strips (111) are parallel to the upper section (11), and the bottom end of the connecting strips (111) is provided with an inverted bevel.

7. The segmental concrete precast pile according to claim 1, characterized in that: The pile body (1) is a solid square pile.

8. The segmental concrete precast pile according to claim 1, characterized in that: The reinforcing cage (3) includes upper section rib (31), upper section ring rib (32), through length rib (33) and lower section ring rib (34), the upper section rib (31) and the through length rib (33) are both prefabricated in the pile body (1), the upper section rib (31) is located in the upper section (11), the through length rib (33) is located between the upper section (11) and the lower section (12), the upper section ring rib (32) is connected with a plurality of upper section rib (31), the lower section ring rib (34) is connected with a plurality of through length rib (33), and the upper section ring rib (32) and the lower section ring rib (34) are connected with a plurality of connecting rib (35).

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