Double casing structure of cast-in-place pile

Abstract

The utility model relates to a double casing structure of bored pile, including outer casing and inner casing, be equipped with several inner protection rings in the outer casing, the bottom circumference of outer casing is installed with several anchor assemblies, the outer casing outer wall upper end circumference is equipped with several support assemblies, and the outer casing top is equipped with several lifting rings, the inner casing is worn in the outer casing, inner protection ring, and the inner casing both ends are worn out the outer casing. The outer casing is assembled from upper casing and lower casing, the upper casing includes upper cylinder wall, and the upper cylinder wall top is equipped with upper sealing ring and is equipped with first connecting ring plate in the bottom, the lower casing includes lower cylinder wall, and the lower cylinder wall top is equipped with second connecting ring plate and is equipped with lower sealing ring in the bottom, the upper sealing ring inner ring, lower sealing ring inner ring all are in close contact with the setting of inner casing outer wall, and first connecting ring plate, second connecting ring plate are fixedly connected through bolt. The utility model can form the guidance and protection when using the outer casing to the inner casing vibration sinking, has improved the precision of inner casing vibration sinking, has improved the quality of final bored pile.

Description

Technical Field

[0001] This utility model relates to the technical field of bored pile construction, and in particular to a double-casing structure for bored piles. Background Technology

[0002] Drilled cast-in-place piles are a commonly used construction technique in pile foundations, characterized by high bearing capacity, strong adaptability, and moderate cost, and are therefore widely used. Traditionally, drilling and casting-in-place piles involve using a temporary steel casing and mud slurry for wall protection. After drilling and concrete pouring, the steel casing is removed to complete the pile.

[0003] During the construction of steel casings, when they are driven into the soil using vibratory sinking equipment, displacement often occurs, which affects the quality of the final pile. Utility Model Content

[0004] This utility model aims to address the shortcomings of existing technologies by providing a double-casing structure for bored piles.

[0005] To achieve the above objectives, this utility model adopts the following technical solution:

[0006] A double-casing structure for bored cast-in-place piles includes an outer casing and an inner casing;

[0007] The outer casing is equipped with several inner protective rings, several anchoring components are installed on the bottom circumference of the outer casing, several support components are installed on the upper circumference of the outer wall of the outer casing, and several lifting rings are installed on the top of the outer casing.

[0008] The inner casing is inserted inside the outer casing and the inner ring, with both ends of the inner casing extending out of the outer casing.

[0009] The outer casing is assembled from an upper casing and a lower casing. The upper casing includes an upper casing wall, with an upper sealing ring at the top and a first connecting ring plate at the bottom. The lower casing includes a lower casing wall, with a second connecting ring plate at the top and a lower sealing ring at the bottom. The inner rings of the upper and lower sealing rings are fitted to the outer wall of the inner casing. The first and second connecting ring plates are fixedly connected by bolts.

[0010] The anchoring assembly includes a connecting plate with an anchoring rod at the bottom. The bottom of the outer casing has a groove corresponding to the connecting plate, and the connecting plate is installed in the corresponding groove by countersunk bolts.

[0011] The support assembly includes an L-shaped support plate welded to the outer wall of the outer casing, with triangular stiffening plates welded between the vertical and horizontal plates of the L-shaped support plate.

[0012] Reinforcing ring plates are welded to the upper ends of both the outer and inner walls of the inner casing.

[0013] Several arc-shaped grooves are formed on the outer wall of the inner casing.

[0014] The beneficial effects of this utility model are: this utility model can use the outer casing to guide and protect the inner casing during vibration and sinking, thereby improving the accuracy of the inner casing vibration and sinking and improving the quality of the final cast-in-place pile. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the inner casing.

[0017] Figure 3 A schematic diagram of the arc-shaped groove opened on the outer wall of the inner casing;

[0018] In the diagram: 1-Outer casing; 2-Inner casing; 3-Inner protective ring; 4-Anchoring assembly; 5-Support assembly; 6-Lifting ring; 7-Reinforcing ring plate; 8-Arc-shaped groove;

[0019] 101 - Upper cylinder wall; 102 - Upper sealing ring; 103 - First connecting ring plate; 104 - Lower cylinder wall; 105 - Second connecting ring plate; 106 - Lower sealing ring; 107 - Bolt;

[0020] 401 - Connecting plate; 402 - Anchor rod; 403 - Countersunk bolt;

[0021] 501-L-shaped support plate; 502-Triangular stiffening plate;

[0022] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0024] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

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

[0027] like Figures 1 to 3 As shown, a double-casing structure for a bored pile includes an outer casing 1, an inner casing 2, an inner retaining ring 3, an anchoring assembly 4, a support assembly 5, a lifting ring 6, a stiffening ring plate 7, and an arc-shaped groove 8.

[0028] The outer casing 1 is provided with several inner protective rings 3, which are welded to the inner wall of the outer casing 1.

[0029] The inner casing 2 is inserted inside the outer casing 1 and the inner ring 3, with both ends of the inner casing 2 extending out of the outer casing 1.

[0030] The outer casing 1 is assembled from the upper casing and the lower casing, and can be disassembled, replaced and maintained.

[0031] The upper casing includes an upper casing wall 101, with an upper sealing ring 102 at the top and a first connecting ring plate 103 at the bottom. The lower casing includes a lower casing wall 104, with a second connecting ring plate 105 at the top and a lower sealing ring 106 at the bottom. The inner rings of the upper sealing ring 102 and the lower sealing ring 106 are both fitted to the outer wall of the inner casing 2. The first connecting ring plate 103 and the second connecting ring plate 105 are fixedly connected by bolts 107.

[0032] Several anchoring components 4 are installed around the bottom circumference of the outer casing 1. The anchoring components 4 are anchored to the soil of the excavated hole to maintain stability.

[0033] The anchoring assembly 4 includes a connecting plate 401, an anchoring rod 402 at the bottom of the connecting plate 401, a groove at the bottom of the outer casing 1 corresponding to the connecting plate 401, and the connecting plate 401 is installed in the corresponding groove by countersunk bolts 403. The bottom of the anchoring rod 402 has a tapered structure.

[0034] The outer casing 1 has several support components 5 on the upper circumference of its outer wall, which can support it on the ground and keep it stable.

[0035] The support assembly 5 includes an L-shaped support plate 501 welded to the outer wall of the outer casing 1, and a triangular stiffening plate 502 welded between the vertical plate and the horizontal plate of the L-shaped support plate 501.

[0036] The top of the outer casing 1 is equipped with several lifting rings 6 for easy hoisting and transfer.

[0037] The upper outer wall and the upper inner wall of the inner casing 2 are both welded with stiffening ring plates 7, which can improve the strength of the connection with the rapping machine when the casing sinks.

[0038] The inner casing 2 has several arc-shaped grooves 8 on its outer wall. When pulling out, a release agent can be injected through the arc-shaped grooves 8 to facilitate better pulling out of the inner casing 2.

[0039] The bottom outer side of the inner casing 2 is equipped with a chamfered structure, which enables smoother vibratory sinking operations.

[0040] When using this utility model, holes are first drilled in the ground to install the outer casing 1. The outer casing 1 can be stably installed using the anchoring component 4 and the support component 5 to ensure its horizontal state. Then, the inner casing 2 is inserted into the outer casing 1, and the vibratory sinking operation begins under the action of the vibratory sinking equipment. The outer casing 1 can guide and protect the inner casing 2, ensuring more accurate vibratory sinking of the inner casing 2 and providing a good guarantee for the final verticality of the cast-in-place pile.

[0041] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A double-casing structure for bored cast-in-place piles, characterized in that, It includes an outer casing (1) and an inner casing (2); The outer casing (1) is provided with several inner protective rings (3), the bottom circumference of the outer casing (1) is provided with several anchoring components (4), the upper circumference of the outer wall of the outer casing (1) is provided with several support components (5), and the top of the outer casing (1) is provided with several lifting rings (6). The inner casing (2) is inserted inside the outer casing (1) and the inner ring (3), and both ends of the inner casing (2) extend out of the outer casing (1).

2. The double-casing structure for a bored pile according to claim 1, characterized in that, The outer casing (1) is assembled from an upper casing and a lower casing. The upper casing includes an upper casing wall (101), with an upper sealing ring (102) at the top and a first connecting ring plate (103) at the bottom. The lower casing includes a lower casing wall (104), with a second connecting ring plate (105) at the top and a lower sealing ring (106) at the bottom. The inner rings of the upper sealing ring (102) and the lower sealing ring (106) are fitted to the outer wall of the inner casing (2). The first connecting ring plate (103) and the second connecting ring plate (105) are fixedly connected by bolts (107).

3. The double-casing structure for a bored pile according to claim 2, characterized in that, The anchoring assembly (4) includes a connecting plate (401), with an anchor rod (402) at the bottom of the connecting plate (401). The bottom of the outer casing (1) is provided with a groove corresponding to the connecting plate (401), and the connecting plate (401) is installed in the corresponding groove by countersunk bolts (403).

4. The double-casing structure for a bored pile according to claim 3, characterized in that, The bottom of the anchor rod (402) has a conical structure.

5. The double-casing structure for a bored pile according to claim 4, characterized in that, The support assembly (5) includes an L-shaped support plate (501) welded to the outer wall of the outer casing (1), and a triangular stiffening plate (502) is welded between the vertical plate and the horizontal plate of the L-shaped support plate (501).

6. The double-casing structure for a bored pile according to claim 5, characterized in that, The inner protective ring (3) is welded to the inner wall of the outer protective sleeve (1).

7. The double-casing structure for a bored pile according to claim 6, characterized in that, The upper end of the outer wall and the upper end of the inner wall of the inner casing (2) are both welded with stiffening ring plates (7).

8. The double-casing structure for a bored pile according to claim 7, characterized in that, The outer wall of the inner sleeve (2) has several arc-shaped grooves (8) on its circumference.

9. The double-casing structure for a bored pile according to claim 8, characterized in that, The inner casing (2) has a chamfered structure on the outer bottom.

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