Soft soil foundation reinforcing pile body structure for water transportation engineering

Abstract

The utility model relates to the technical field of foundation construction of water transportation engineering, in particular to a soft soil foundation reinforcing pile body structure of water transportation engineering, which comprises a pile body, an expansion pile, a plurality of reinforcing piles and a plurality of reinforcing piles, wherein the pile body adopts a high-strength pre-stressed concrete pipe pile, and the expansion pile is arranged at the bottom of the pile body, is formed by pouring concrete and takes the shape of an inverted circular truncated cone; the high-strength reinforcement cages are arranged in the pile body and the expansion pile, the reinforcing sleeve is fixedly connected to the bottom of the outer side of the pile body, the outer portion of the reinforcing sleeve is symmetrically and fixedly connected with the side lugs, and the six concrete blocks are symmetrically poured to the top of the expansion pile and used in cooperation with the corresponding side lugs through fastening screws. The expansion pile has the advantages that the design of the high-strength prestressed concrete pile body, the expansion pile and the anti-pulling anchoring part can meet the strict requirement of water transportation engineering for the bearing capacity of a foundation, the application of the anti-corrosion coating effectively prevents the expansion pile from being corroded in corrosive environments such as seawater, the service life of the expansion pile is prolonged, and the service life of the expansion pile is prolonged. Compared with a traditional device, the operation quality and the use efficiency are greatly improved.

Description

A pile structure for reinforcing soft soil foundations in waterway engineering Technical Field

[0001] This utility model relates to the field of waterway engineering infrastructure construction technology, and in particular to a pile structure for reinforcing soft soil foundations in waterway engineering. Background Technology

[0002] In waterway engineering construction, such as the foundations of ports, wharves, and breakwaters, the foundations are often built on soft soil.

[0003] Soft soil foundations are characterized by high water content, large void ratio, strong compressibility, and low shear strength, making it difficult to meet the engineering requirements for foundation bearing capacity and stability.

[0004] Traditional pile structures have many shortcomings when used for soft soil foundation reinforcement. On the one hand, the friction between ordinary piles and soft soil is limited. Under the long-term effects of external forces such as water erosion and ship mooring, pile displacement and settlement are likely to occur, affecting the normal use of engineering facilities. On the other hand, some pile structures have poor durability. In corrosive environments such as seawater, pile materials are easily corroded, reducing the strength and service life of the piles, increasing the maintenance costs and safety hazards of the project.

[0005] To address the aforementioned issues, we have developed a pile structure for reinforcing soft soil foundations in waterway engineering. Summary of the Invention

[0006] This utility model discloses a pile structure for reinforcing soft soil foundations in waterway engineering, aiming to solve the technical problems in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A pile structure for reinforcing soft soil foundations in waterway engineering includes: a pile body, wherein the pile body is a high-strength prestressed concrete pipe pile; an enlarged pile, wherein the enlarged pile is located at the bottom of the pile body, is cast in concrete, and is in the shape of an inverted frustum with a diameter larger than that of the pile body; both the pile body and the enlarged pile are internally equipped with high-strength steel reinforcement cages; a reinforcement sleeve, wherein the reinforcement sleeve is fixedly connected to the bottom of the outer side of the pile body and has symmetrically fixed side lugs on its exterior; and six concrete blocks, wherein the six concrete blocks are symmetrically cast on the top of the enlarged pile and are used in conjunction with the corresponding side lugs by fastening screws.

[0009] First, the precast high-strength prestressed concrete pipe piles are hoisted to the designated location and driven into the soft soil foundation using piling equipment. Next, enlarged piles are poured at the bottom of the pile body. Because the enlarged piles are truncated cones with a diameter larger than the pile body, they can increase the contact area between the pile body and the foundation, thereby improving the bearing capacity. When pouring the enlarged piles, a high-strength steel cage is placed in it in advance. At the same time, six concrete blocks are symmetrically poured on the top of the enlarged piles. Then, a reinforcing sleeve with side lugs is fixed to the bottom of the outer side of the pile body. The concrete blocks are connected to the side lugs by fastening screws. In the construction of a wharf trestle, multiple such reinforcing enlarged piles are closely arranged to jointly support the foundation structure of the trestle, effectively preventing the trestle from deforming or being damaged due to the settlement of the soft soil foundation.

[0010] In a preferred embodiment, anchor chains are provided on both sides of the bottom of the enlarged pile, and anti-pull-out anchors are provided at the ends of the anchor chains away from the enlarged pile.

[0011] The pull-out anchors provide reverse resistance in soft soil, which is transmitted to the enlarged piles through the anchor chain, effectively resisting the pull-out force generated by the waves and ensuring the stability of the breakwater.

[0012] In a preferred embodiment, the pile body is prestressed by post-tensioning.

[0013] The elastic recoil of the prestressing tendons generates prestress on the pile body, which improves the crack resistance and bearing capacity of the pile body. Thanks to the prestress applied by the post-tensioning method, the pile body always maintains good structural performance and no cracks or other damage occur.

[0014] In a preferred embodiment, the surface of the enlarged pile is coated with an anti-corrosion coating made of a corrosion-resistant polymer material.

[0015] The anti-corrosion coating can effectively isolate river water from the concrete surface of the enlarged pile, preventing acidic substances from corroding the internal structure of the enlarged pile concrete.

[0016] In a preferred embodiment, the pull-out anchor is made of high-strength steel, is U-shaped, with one end welded to the anchor chain and the other end buried in soft soil.

[0017] When the lake level rises during the rainy season, the pile is subjected to a large buoyancy. The part of the pull-out anchor buried in the soft soil relies on the friction of the surrounding soft soil and the resistance generated by its own shape to hold the expanded pile with the anchor chain, effectively resisting the impact of buoyancy on the pile and ensuring that the cruise ship dock can remain stable under different water level conditions, thus providing a guarantee for the docking of cruise ships and the safety of tourists.

[0018] In a preferred embodiment, the anti-corrosion coating is applied by brushing and has a thickness of ≥500μm.

[0019] During the brushing process, multiple coats are applied to ensure that the thickness of the anti-corrosion coating reaches ≥500μm. After such construction treatment, even if the pile is soaked in river water containing corrosive chemicals discharged from the chemical industrial park for a long time during subsequent use, the enlarged pile still maintains good structural performance.

[0020] The pile structure for reinforcing soft soil foundations in waterway engineering provided by this utility model has the following advantages:

[0021] In this invention, an enlarged pile is poured at the bottom of the pile body. Since the enlarged pile is in the shape of an inverted frustum and its diameter is larger than that of the pile body, it can increase the contact area between the pile body and the foundation. When pouring the enlarged pile, a high-strength steel cage is placed in it in advance, and a reinforcing sleeve with side ears is fixed to the bottom of the outer side of the pile body. The concrete block is connected to the side ears by fastening screws. Multiple such reinforced enlarged piles are arranged closely to support the foundation structure of the trestle bridge and effectively prevent the trestle bridge from deforming or being damaged due to the settlement of the soft soil foundation.

[0022] 1. The design of high-strength prestressed concrete pile body, enlarged pile and anti-pull-out anchor effectively improves the bearing capacity of the pile body in soft soil foundation, and can meet the strict requirements of waterway engineering for foundation bearing capacity;

[0023] 2. The application of anti-corrosion coating effectively prevents the enlarged pile from corroding in corrosive environments such as seawater, extends the service life of the enlarged pile, reduces the maintenance cost of the project, and greatly improves the quality of operation and efficiency of use compared with traditional devices. Attached Figure Description

[0024] Figure 1 is a first-view perspective three-dimensional schematic diagram of a pile structure for reinforcing soft soil foundation in waterway engineering proposed in this utility model.

[0025] Figure 2 is a second-view perspective three-dimensional schematic diagram of a pile structure for reinforcing soft soil foundation in waterway engineering proposed in this utility model.

[0026] Figure 3 is a cross-sectional schematic diagram of a pile structure for reinforcing soft soil foundation in waterway engineering proposed in this utility model.

[0027] Figure 4 is a schematic diagram of the reinforcement sleeve structure of a pile structure for reinforcing soft soil foundation in waterway engineering proposed in this utility model.

[0028] Figure 5 is a schematic diagram of the anti-pull-out anchor structure of a pile structure for reinforcing soft soil foundation in waterway engineering proposed in this utility model.

[0029] Figure 6 is a top sectional view of an enlarged pile for reinforcing soft soil foundations in waterway engineering, as proposed in this utility model.

[0030] In the attached diagram: 1. Pile body; 2. Enlarged pile; 3. High-strength steel cage; 4. Anchor chain; 5. Pull-out anchor; 6. Reinforcing sleeve; 7. Side lug; 8. Concrete block; 9. Fastening screw; 10. Anti-corrosion coating. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] The pile structure for reinforcing soft soil foundations in waterway engineering disclosed in this utility model is mainly applied to the foundation construction of waterway engineering projects.

[0033] Referring to Figures 1-6, a pile structure for reinforcing soft soil foundations in waterway engineering includes: a pile body 1, which is a high-strength prestressed concrete pipe pile; an enlarged pile 2, which is located at the bottom of the pile body 1 and is made of concrete, forming an inverted frustum shape with a diameter larger than that of the pile body 1; both the pile body 1 and the enlarged pile 2 are equipped with high-strength steel cages 3; a reinforcement sleeve 6, which is fixedly connected to the bottom of the outer side of the pile body 1 and has symmetrically fixed side ears 7 on the outside; and six concrete blocks 8, which are symmetrically cast on the top of the enlarged pile 2 and are used in conjunction with the corresponding side ears 7 by fastening screws 9.

[0034] In this embodiment: First, the precast high-strength prestressed concrete pipe pile body 1 is hoisted to the designated location and driven into the soft soil foundation using a pile driving device. Then, an enlarged pile 2 is poured at the bottom of the pile body 1. Since the enlarged pile 2 is in the shape of an inverted frustum and has a diameter larger than the pile body 1, it can increase the contact area between the pile body and the foundation and improve the bearing capacity. When pouring the enlarged pile 2, a high-strength steel cage 3 is placed in it in advance. At the same time, six concrete blocks 8 are symmetrically poured on the top of the enlarged pile 2. Then, a reinforcing sleeve 6 with side lugs 7 is fixed to the bottom of the outer side of the pile body 1. The concrete blocks 8 are connected to the side lugs 7 by fastening screws 9. In the construction of a wharf pier, multiple such reinforcing enlarged pile bodies 2 are closely arranged to jointly support the foundation structure of the pier, effectively preventing the pier from deforming or being damaged due to the settlement of the soft soil foundation.

[0035] In a preferred embodiment, anchor chains 4 are provided on both sides of the bottom of the enlarged pile 2, and anti-pull-out anchors 5 are provided at the ends of the anchor chains 4 away from the enlarged pile 2.

[0036] In this embodiment, the pull-out anchor 5 provides reverse resistance in soft soil, which is transmitted to the enlarged pile 2 through the anchor chain 4, effectively resisting the pull-out force generated by the waves and ensuring the stability of the breakwater.

[0037] In a preferred embodiment, the high-strength prestressed concrete pile body 1 is prestressed by post-tensioning.

[0038] In this embodiment, the elastic recoil of the prestressing tendons generates prestress on the pile body 1, which improves the crack resistance and bearing capacity of the pile body 1. With the prestress applied by the post-tensioning method, the pile body 1 maintains good structural performance and no cracks or other damage occur.

[0039] In a preferred embodiment, the surface of the enlarged pile 2 is coated with an anti-corrosion coating 10, which is made of a corrosion-resistant polymer material.

[0040] In this embodiment, the anti-corrosion coating 10 can effectively isolate the river water from the concrete surface of the enlarged pile 2, preventing acidic substances from corroding the internal structure of the concrete of the enlarged pile 2.

[0041] In a preferred embodiment, the pull-out anchor 5 is made of high-strength steel, is U-shaped, with one end welded to the anchor chain 4 and the other end buried in soft soil.

[0042] In this embodiment, when the lake water level rises during the rainy season, the pile body is subjected to a large buoyancy force. The part of the pull-out anchor 5 buried in the soft soil relies on the friction force of the surrounding soft soil and the resistance generated by its own shape to pull the enlarged pile 2 through the anchor chain 4, effectively resisting the influence of buoyancy on the pile body, ensuring that the cruise ship dock can remain stable under different water level conditions, and providing a guarantee for the docking of cruise ships and the safety of tourists.

[0043] In a preferred embodiment, the anti-corrosion coating 10 is applied by brushing and has a thickness of ≥500μm.

[0044] In this embodiment, during the brushing process, multiple coats are applied to ensure that the thickness of the anti-corrosion coating 10 reaches ≥500μm. After such construction treatment, even if the pile 2 is soaked in river water containing corrosive chemicals discharged from the chemical industrial park for a long time during subsequent use, the enlarged pile 2 still maintains good structural performance.

[0045] Working principle: In use, the high-strength prestressed concrete pipe pile is first used as the pile body 1, and the prestress is applied by post-tensioning to enhance the structural strength.

[0046] A truncated frustum-shaped enlarged pile 2 is poured at the bottom of pile body 1. The enlarged pile 2 and the high-strength steel cage 3 inside pile body 1 form an integral load-bearing structure.

[0047] Anchor chains 4 are installed on both sides of the bottom of the enlarged pile 2 to connect U-shaped pull-out anchors 5. The anchors are buried in soft soil to enhance the pull-out resistance.

[0048] A reinforcing sleeve 6 is installed on the outer side of the bottom of the pile body 1, and is connected to the six concrete blocks 8 symmetrically poured on the top of the enlarged pile 2 through the side lugs 7 with fastening screws 9 to form a fixed upper and lower structure;

[0049] The surface of the enlarged pile 2 is coated with a polymer anti-corrosion coating 10 with a thickness of ≥500μm to improve its corrosion resistance.

[0050] The entire pile structure increases the bearing area by enlarging pile 2, provides compressive strength by prestressed pile body 1, enhances pull-out resistance by anchoring system, and ensures structural integrity by connecting concrete block 8 with reinforcing sleeve 6, thereby effectively reinforcing soft soil foundations and making it suitable for complex geological conditions in waterway engineering.

[0051] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A pile structure for reinforcing soft soil foundations in waterway engineering, characterized in that, include: The pile body (1) is made of high-strength prestressed concrete pipe pile; Enlarged pile (2), the enlarged pile (2) is set at the bottom of the pile body (1), is made of concrete, is in the shape of an inverted frustum, and has a diameter larger than that of the pile body (1). The pile body (1) and the enlarged pile (2) are both equipped with high-strength steel cages (3); Reinforcing sleeve (6), the reinforcing sleeve (6) is fixedly connected to the bottom of the outside of the pile body (1), and has side ears (7) symmetrically fixedly connected to the outside; Six concrete blocks (8), the six concrete blocks (8) are symmetrically cast on the top of the enlarged pile (2), and are used in conjunction with the corresponding side ears (7) by fastening screws (9).

2. The pile structure for reinforcing soft soil foundations in waterway engineering according to claim 1, characterized in that, Anchor chains (4) are provided on both sides of the bottom of the enlarged pile (2), and anti-pull-out anchors (5) are provided at the ends of the anchor chains (4) away from the enlarged pile (2).

3. The pile structure for reinforcing soft soil foundations in waterway engineering according to claim 1, characterized in that, The pile body (1) is prestressed by post-tensioning.

4. The pile structure for reinforcing soft soil foundations in waterway engineering according to claim 1, characterized in that, The surface of the enlarged pile (2) is coated with an anti-corrosion coating (10), which is made of a corrosion-resistant polymer material.

5. A pile structure for reinforcing soft soil foundations in waterway engineering according to claim 2, characterized in that, The pull-out anchor (5) is made of high-strength steel and is U-shaped. One end is welded to the anchor chain (4) and the other end is buried in soft soil.

6. The pile structure for reinforcing soft soil foundations in waterway engineering according to claim 4, characterized in that, The anti-corrosion coating (10) is applied by brushing and has a thickness of ≥500μm.

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