Sheet pile embankment structure applied to soft foundation condition

Abstract

A sheet pile embankment structure applied to a soft foundation condition is arranged on a soil layer and a soft soil layer and comprises two sheet piles, a plurality of partition plates and a plurality of anchor rods, the partition plates are arranged between the two sheet piles, connected with the two sheet piles and used for partitioning soft soil between the two sheet piles, and the anchor rods are arranged between the two sheet piles and connected with the two sheet piles. The fixing device is used for fixing two sheet piles; compared with the prior art, the soft soil is sealed through a fixed connecting structure formed among the sheet piles, the partition plates and the anchor rods, the bearing capacity of the whole structure is enhanced by means of the low permeability of the soft soil and the low compressibility under the lateral confinement condition, and the boundary condition that undrained lateral confinement is applied to the soft soil, and soft soil sedimentation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of soft foundation treatment, and particularly relates to a sheet pile embankment structure applied to soft foundation conditions. Background Technique

[0002] Soft soil is a kind of fine-grained soil with high natural water content, large void ratio, high compressibility and low shear strength, which is commonly found in coastal areas, river valleys, swamps, etc.; the common soft soil in the foundation generally refers to cohesive soil in a soft plastic or fluid plastic state, with special geological properties such as creep and thixotropy. In road engineering, due to its weak bearing capacity and high compressibility, soft soil cannot be directly used as the roadbed. When building an embankment on soft soil foundation, if effective reinforcement measures are not taken, disasters such as collapse, landslide or settlement will occur to varying degrees; to ensure the safety and stability of road engineering, targeted treatment of soft soil foundation is required.

[0003] The following several methods are often used in the prior art to treat soft soil foundation, such as replacement cushion method, surcharge preloading method, cement soil mixing pile method and reinforced subgrade method, etc. The essence of the above methods is to directly treat soft soil to reduce the compressibility of soft soil foundation and increase the bearing capacity of soft soil foundation, so as to meet the requirements of subgrade standard design. When using the above methods to reinforce and treat soft soil foundation, there are problems such as cumbersome process, long construction period and high construction cost. Content of the Utility Model

[0004] Aiming at the above deficiencies, the technical problem to be solved by the utility model is to provide a sheet pile embankment structure applied to soft foundation conditions, which is used for the closed reinforcement treatment of soft soil foundation, simplifies the treatment process of soft soil foundation, shortens the construction period and reduces the construction cost.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is: a sheet pile embankment structure applied to soft foundation conditions, which is arranged on the soil layer and the soft soil layer, and includes two sheet piles, multiple partition boards and multiple anchor rods; the multiple partition boards are arranged between the two sheet piles and are connected with the two sheet piles, and are used for separating the soft soil between the two sheet piles; the multiple anchor rods are arranged between the two sheet piles and are connected with the two sheet piles, and are used for fixing the two sheet piles.

[0006] As a preferred scheme of the utility model, one end of the sheet pile penetrates through the soft soil layer and is inserted into the soil layer, and the other end is located above the soft soil layer.

[0007] As a preferred scheme of the utility model, one end of the partition board penetrates through the soft soil layer and is inserted into the soil layer, and the other end is located above the soft soil layer.

[0008] As a preferred scheme of the utility model, connection beams are uniformly arranged on the outer sides of the two sheet piles, and the connection beams are arranged along the length direction of the sheet piles.

[0009] As a preferred solution of the present utility model, the partition board is arranged perpendicular to the two sheet piles, and both sides of the partition board are fixedly connected to the two sheet piles respectively.

[0010] As a preferred solution of the present utility model, multiple partition boards are arranged in parallel and at equal intervals along the length direction of the sheet piles.

[0011] As a preferred solution of the present utility model, two anchor rods are arranged at the connection between the partition board and the sheet pile, and the two anchor rods are symmetrically arranged with respect to the partition board.

[0012] As a preferred solution of the present utility model, the ends of multiple anchor rods all pass through the sheet piles, and the ends of the multiple anchor rods are fixedly connected to the tie beam located outside the sheet piles.

[0013] As a preferred solution of the present utility model, multiple anchor rods are arranged parallel to each other and perpendicular to the sheet piles.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The soft soil is enclosed by the fixed connection structure formed among the sheet piles, the partition board and the anchor rods. Relying on the low permeability of the soft soil itself and the low compressibility under the lateral confinement condition, the boundary condition of undrained lateral confinement is applied to the soft soil to enhance the bearing capacity of the overall structure and reduce the settlement of the soft soil. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a lower sheet pile embankment structure applied to soft foundation conditions provided by an embodiment of the present application;

[0016] Figure 2 It is an installation schematic diagram of a lower sheet pile embankment structure applied to soft foundation conditions provided by an embodiment of the present application;

[0017] Reference numerals: soil layer a, soft soil layer b, sheet pile 1, partition board 2, anchor rod 3, tie beam 4. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application.

[0019] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes can be made to the functions and arrangements of the described elements without departing from the scope of the content of the present application. Various processes or components can be appropriately omitted, substituted, or added to each example. For example, the described methods can be executed in a different order than the described order, and various steps can be added, omitted, or combined. In addition, the features described in some examples can be combined into other examples.

[0020] Please refer toFigure 1 , Figure 1 shows a schematic structural diagram of a sheet pile embankment structure provided in an embodiment of the present application applied to soft foundation conditions. As Figure 1 shown, a sheet pile embankment structure applied to soft foundation conditions is arranged on soil layer a and soft soil layer b, and includes two sheet piles 1, multiple partition plates 2, and multiple anchor rods 3; the multiple partition plates 2 are arranged between the two sheet piles 1 and are connected to the two sheet piles 1 for separating the soft soil between the two sheet piles 1; the multiple anchor rods 3 are arranged between the two sheet piles 1 and are connected to the two sheet piles 1 for fixing the two sheet piles 1.

[0021] Specifically, one end of the two sheet piles 1 penetrates through the soft soil layer b and is inserted into the soil layer a, and the two sheet piles 1 are fixed by the soil layer a. The other ends of the two sheet piles 1 are located above the soft soil layer b; the multiple partition plates 2 are arranged between the two sheet piles 1, and one end of each of the multiple partition plates 2 penetrates through the soft soil layer b and is inserted into the soil layer a, and the multiple partition plates 2 are fixed by the soil layer a. The other ends of the multiple partition plates 2 are located above the soft soil layer b; there is a certain distance between the two sheet piles 1 and between the multiple partition plates 2. The two sheet piles 1 and the multiple partition plates 2 cooperate to divide the soft soil layer b horizontally and longitudinally. Multiple anchor rods 3 are arranged between the two sheet piles 1, and tensile force is applied to the two sheet piles 1 through the multiple anchor rods 3 to apply lateral restraint to the soft soil between the two sheet piles 1, adjacent partition plates 2, and the soil layer a; at the same time, the multiple anchor rods 3 cooperate with the soil layer a to fix the two sheet piles 1 to prevent the two sheet piles 1 from tilting under the extrusion of the soft soil and affecting the stability of the overall structure.

[0022] Preferably, connection beams 4 are uniformly arranged on the outer sides of the two sheet piles 1, and the connection beams 4 are arranged along the length direction of the sheet piles 1; in the actual application of the embodiment of the present invention, the soft soil between the two sheet piles 1 and between the multiple partition plates 2 is compressed under the action of vertical load, so the soft soil in the compressed state will extrude the surrounding sheet piles 1 and partition plates 2; to prevent the sheet piles 1 from deforming under the extrusion of the soft soil, connection beams 4 are arranged on the sheet piles 1 to enhance the strength of the sheet piles 1, so that the sheet piles 1 can withstand greater extrusion force and prevent the overall structure from failing due to extrusion deformation of the sheet piles 1. Further, multiple connection beams 4 can be arranged in parallel along the width direction of the sheet piles 1 to further enhance the strength of the sheet piles 1 and increase the ability of the sheet piles 1 to resist extrusion deformation.

[0023] More preferably, the ends of multiple anchor rods 3 all pass through the sheet pile 1, and the ends of the multiple anchor rods 3 are fixedly connected to the tie beam 4 located outside the sheet pile 1; the anchor rod 3 acts on the sheet pile 1 through the tie beam 4, and the tie beam 4 evenly transfers the tension of the anchor rod 3 to the sheet pile 1, making the force on the sheet pile 1 more uniform and avoiding excessive local tension on the sheet pile 1, which may cause damage to the structure of the sheet pile 1 by the anchor rod 3. At the same time, to prevent the anchor rod 3 from rusting due to environmental factors, anti-rust treatments such as painting and galvanizing can be carried out on the surface of the anchor rod 3, or a protective sleeve can be installed outside the anchor rod 3.

[0024] Optionally, an anchor rod 3 and a tie beam 4 are arranged at one end of the sheet pile 1 away from the soil layer a. The anchor rod 3 and the tie beam 4 cooperate with the soil layer a to respectively limit the upper and lower displacements of the sheet pile 1 and improve the mechanical performance of the sheet pile 1.

[0025] More preferably, multiple anchor rods 3 are arranged parallel to each other and perpendicular to the sheet pile 1, so that the tension applied by the anchor rod 3 on the sheet pile 1 can act vertically on the sheet pile 1, avoiding the generation of torsion on the sheet pile 1 due to the non-perpendicularity of the anchor rod 3 to the sheet pile 1, which is not conducive to maintaining the stability of the overall structure.

[0026] In the embodiment of the present utility model, to meet the stability requirements of the structure, it is necessary to prevent the position or shape of the partition plate 2 interacting with the soft soil from changing when the soft soil bears an external vertical load. Therefore, the partition plate 2 is arranged perpendicular to the two sheet piles 1, and both sides of the partition plate 2 are fixedly connected to the two sheet piles 1 respectively, avoiding the generation of torsional stress on the partition plate 2 when the soft soil on both sides of the partition plate 2 squeezes the partition plate 2, which may cause the partition plate 2 to bend or shear and change the overall shape of the partition plate 2.

[0027] Preferably, multiple partition plates 2 are arranged parallel and equidistant along the length direction of the sheet pile 1. With the cooperation of the multiple partition plates 2 and the two sheet piles 1, the soft soil located between the two sheet piles 1 and the multiple partition plates 2 is evenly divided, so that the extrusion forces applied by the soft soil on both sides of each partition plate 2 are the same, and the extrusion forces applied by the soft soil between the two sheet piles 1 on the two sheet piles 1 are the same.

[0028] Preferably, two anchor rods 3 are arranged at the connection between the partition plate 2 and the sheet pile 1, and the two anchor rods 3 are symmetrically arranged with respect to the partition plate 2, further strengthening the sheet pile embankment structure by the strength of the anchor rods 3 at the connection between the partition plate 2 and the sheet pile 1.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0030] Although the terms such as soil layer a, soft soil layer b, sheet pile 1, partition 2, anchor rod 3, tie beam 4, etc. are used more frequently herein as reference numerals in the drawings, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present utility model; any interpretation of them as an additional limitation is contrary to the spirit of the present utility model.

Claims

1. A sheet pile embankment structure for use in soft foundation conditions, arranged on a soil layer (a) and a soft soil layer (b), characterized in that: It comprises two sheet piles (1), a plurality of partition plates (2) and a plurality of anchor rods (3); The plurality of partition plates (2) are arranged between the two sheet piles (1) and connected to the two sheet piles (1) for separating the soft soil between the two sheet piles (1); the plurality of anchor rods (3) are arranged between the two sheet piles (1) and connected to the two sheet piles (1) for fixing the two sheet piles (1).

2. A sheet pile embankment structure applied to soft foundation conditions according to claim 1, characterized in that: One end of the sheet pile (1) passes through the soft soil layer (b) and is inserted into the soil layer (a), and the other end is located above the soft soil layer (b).

3. The sheet pile embankment structure used in soft foundation conditions according to claim 1, characterized in that: One end of the partition (2) passes through the soft soil layer (b) and is inserted into the soil layer (a), and the other end is located above the soft soil layer (b).

4. The sheet pile embankment structure used in soft foundation conditions according to claim 1, characterized in that: Connecting beams (4) are arranged on the outer sides of the two sheet piles (1), and the connecting beams (4) are arranged along the length direction of the sheet piles (1).

5. The sheet pile embankment structure used in soft foundation conditions according to claim 1, characterized in that: The partition plate (2) is arranged perpendicularly to the two sheet piles (1), and two sides of the partition plate (2) are respectively fixedly connected to the two sheet piles (1).

6. A sheet pile embankment structure for use under soft foundation conditions according to claim 5, characterized in that: The plurality of partition plates (2) are arranged in parallel and at equal distances along the length direction of the sheet pile (1).

7. A sheet pile embankment structure for use under soft foundation conditions according to claim 6, characterized in that: Two anchor rods (3) are arranged at the connection between the partition (2) and the sheet pile (1), and the two anchor rods (3) are arranged symmetrically with respect to the partition (2).

8. The sheet pile embankment structure used in soft foundation conditions according to claim 1, characterized in that: The ends of the plurality of anchor rods (3) all pass through the sheet pile (1), and the ends of the plurality of anchor rods (3) are fixedly connected to a connecting beam (4) located outside the sheet pile (1).

9. A sheet pile embankment structure for use under soft foundation conditions according to claim 8, characterized in that: The plurality of anchor rods (3) are arranged parallel to each other and perpendicular to the sheet pile (1).

Images