Pipe sinking device for cement-soil mixing pile

Abstract

The utility model relates to a pipe sinking device for a cement mixing pile, which belongs to the technical field of foundation engineering, and comprises an outer pipe and an inner pipe, and a steel plate conical cylinder is fixedly connected in the outer pipe. According to the pipe sinking device for the cement-soil mixing pile, when cement mortar is poured, firstly, an outer pipe is installed in a pile foundation pit, then a steel plate conical cylinder is welded to the outer pipe, an inner cylinder is located on the top of the steel plate conical cylinder, then a grouting pipe is installed between the outer pipe and the inner pipe, and a first supporting ring plate is placed on the top of a limiting block for interval supporting; and then a second supporting ring plate sequentially enters the interior of a supporting block, so that the effect is better when the inner pipe is supported, and the situation that the mode deviates easily is achieved, and when cement mortar is poured, due to the fact that the bent corner of the grouting pipe is designed to be arc, the cement mortar can flow out more smoothly to make contact with an external soil body, and the construction efficiency is improved. And the residual condition is avoided as much as possible, so that the pouring work efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation engineering technology, specifically to a driven pipe device for cement-soil mixing piles. Background Technology

[0002] Cement-soil mixing piles are commonly used to reinforce various foundation soil layers with high water content and low bearing capacity, including silt, silty soil, silty loam, sandy soil, and peat soil. The principle behind this reinforcement is that cement is used as a hardening agent. Specialized mixing equipment is used to forcibly mix the soft soil and hardening agent at a certain depth in situ. A series of physicochemical reactions occur between the soil being reinforced and the hardening agent, causing the soil to harden into a high-quality pile with integrity, water stability, and a certain strength, thereby improving the foundation. Compared to cast-in-place concrete piles, cement-soil mixing piles are more economical in terms of materials and have a simpler construction process.

[0003] According to Chinese Patent CN214460346U, a driven pipe device for cement-soil mixing piles is described. During the process of the driven pipe device being pressed into the soil, both the soil inside and outside the pipe are subjected to a certain horizontal compaction effect. On the one hand, this increases the density of the pile inside the pipe, and on the other hand, it increases the lateral resistance of the soil outside the pile, thereby increasing the bearing capacity of the pile. During the pipe extraction process, grouting is performed at the interface between the pile and the surrounding soil through a grouting pipe, which improves the bonding between the pile and the soil at the pile bottom and side, thereby increasing the lateral resistance and end resistance of the pile and enhancing its bearing capacity. The outer pipe of this driven pipe device is longer than the inner pipe, which makes the bottom of the driven pipe form a pointed tip, which is more conducive to the driven pipe operation. Furthermore, the lower section of the cement-soil mixing pile obtained by using this driven pipe device is an enlarged section, which can further improve the bearing capacity of the pile.

[0004] When installing the inner and outer pipes, the device does not have a limiting structure at the bottom of the annular support plate, which makes the lateral support effect unstable and the inner pipe prone to displacement. In addition, the grouting pipe adopts a 90-degree bend design, which makes it easy for cement mortar to remain. The grouting speed of the soil around the pile body is easily affected, which is not conducive to the rapid flow of cement mortar. Therefore, a sinking pipe device for cement-soil mixing piles is proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a driven pipe device for cement-soil mixing piles. A limiting structure is installed at the bottom of the annular support plate, preventing detachment during support. It also offers advantages such as higher coaxiality between the inner and outer pipes, facilitating more uniform cement mortar pouring. This solves the problems of unstable lateral support due to the lack of a limiting structure at the bottom of the annular support plate during installation, easy displacement of the inner pipe, and cement mortar residue caused by the 90-degree bend in the grouting pipe, which affects the grouting speed around the pile and hinders rapid cement mortar flow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a driven pipe device for cement-soil mixing piles, comprising an outer pipe and an inner pipe, wherein a steel plate cone is fixedly connected inside the outer pipe, and a limiting block is fixedly connected to one side of the outer pipe and the inner pipe respectively, a first supporting ring plate is placed on the top of the limiting block, and a supporting block is fixedly connected to one side of the outer pipe and the inner pipe respectively, and a second supporting ring plate is placed on the top of the supporting block.

[0007] Furthermore, the steel plate cone is welded to the inner wall of the outer tube, and the inner tube is located at the top of the steel plate cone.

[0008] Furthermore, a grouting pipe is placed between the outer pipe and the inner pipe, and the bend of the grouting pipe is an arc-shaped pipe.

[0009] Furthermore, the limiting block is T-shaped, and the first support ring plate has a snap-fit ​​groove inside, through which the limiting block snaps into the first support ring plate.

[0010] Furthermore, there are two second support ring plates, which are positioned vertically between the outer tube and the inner tube.

[0011] Furthermore, a support groove is provided inside the second support ring plate at the bottom, and the support block is in the shape of a trapezoidal block and is located inside the second support ring plate at the bottom through the support groove.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] 1. The driven pipe device for this cement-soil mixing pile involves first installing the outer pipe into the pile pit during cement mortar pouring, followed by welding a steel plate cone to it. The inner pipe is located at the top of the steel plate cone. Then, the grouting pipe is installed between the outer and inner pipes. The first support ring plate is placed on top of the limiting block for spacing support, and then the second support ring plate is sequentially installed inside the support block. This achieves better support for the inner pipe and prevents it from shifting. During cement mortar pouring, the curved design at the bend of the grouting pipe allows the cement mortar to flow out more smoothly and contact the external soil, minimizing residue and improving the efficiency of the pouring process.

[0014] 2. The sinking device for the cement-soil mixing pile, by setting a limiting block, makes it less likely for the first support ring plate 5 to fall off when it is being supported, thus ensuring stronger support stability and preventing it from loosening. Attached Figure Description

[0015] Figure 1 This is a main sectional view of the structure of this utility model;

[0016] Figure 2 This is a top view of the supporting ring plate of the present invention.

[0017] Figure 3 This is a three-dimensional view of the structural steel plate cone of this utility model.

[0018] In the diagram: 1. Outer pipe; 2. Steel plate cone; 3. Inner pipe; 4. Limiting block; 5. First support ring plate; 6. Grouting pipe; 7. Support block; 8. Second support ring plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 The sinking device for cement-soil mixing piles in this embodiment includes an outer pipe 1 and an inner pipe 3. A steel plate cone 2 is fixedly connected inside the outer pipe 1. The steel plate cone 2 is welded to the inner wall of the outer pipe 1. The inner pipe 3 is located at the top of the steel plate cone 2.

[0021] Limiting blocks 4 are fixedly connected to opposite sides of the outer pipe 1 and the inner pipe 3. A first support ring plate 5 is placed on the top of the limiting block 4. The limiting block 4 is T-shaped. A snap-fit ​​groove is opened inside the first support ring plate 5. The limiting block 4 is snap-fitted to the first support ring plate 5 through the snap-fit ​​groove. A grouting pipe 6 is placed between the outer pipe 1 and the inner pipe 3. The bend of the grouting pipe 6 is an arc-shaped pipe.

[0022] Support blocks 7 are fixedly connected to the opposite sides of the outer tube 1 and the inner tube 3. A second support ring plate 8 is placed on the top of the support block 7. There are two second support ring plates 8, which are located between the outer tube 1 and the inner tube 3 in an up-down manner. A support groove is opened inside the bottom second support ring plate 8. The support block 7 is in the shape of a trapezoidal block and is located inside the bottom second support ring plate 8 through the support groove.

[0023] In this embodiment, by setting a limiting block 4, the first support ring plate 5 is less likely to fall off when it is providing support, thus ensuring stronger support stability and preventing it from loosening.

[0024] In this embodiment, since there are two second support ring plates 8, one above the other, it is not easy for misalignment to occur at the top of the outer tube 1 and the inner tube 3, thus ensuring the consistency of coaxiality.

[0025] The working principle of the above embodiments is as follows:

[0026] The cement-soil mixing pile using the driven pipe device involves first installing the outer pipe 1 into the pile pit during cement mortar pouring, followed by welding the steel plate cone 2 to it. The inner pipe 3 is located at the top of the steel plate cone 2. Then, the grouting pipe 6 is installed between the outer pipe 1 and the inner pipe 3. The first support ring plate 5 is placed on top of the limiting block 4 for spacing support, and then the second support ring plate 8 is sequentially installed inside the support block 7. This achieves better support for the inner pipe 3 and prevents it from shifting. During cement mortar pouring, the arc-shaped design at the bend of the grouting pipe 6 allows the cement mortar to flow out more smoothly and contact the external soil, minimizing residue and improving the efficiency of the pouring work.

[0027] It should be noted that all standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sinking pipe device for cement-soil mixing pile, comprising an outer pipe (1) and an inner pipe (3), characterized in that: The outer tube (1) is fixedly connected with a steel plate cone cylinder (2), opposite sides of the outer tube (1) and the inner tube (3) are fixedly connected with limiting blocks (4), the top of the limiting block (4) is placed with a first support ring plate (5), opposite sides of the outer tube (1) and the inner tube (3) are fixedly connected with support blocks (7), and the top of the support block (7) is placed with a second support ring plate (8).

2. The sinking pipe device for cement-soil mixing pile according to claim 1, characterized in that: The steel plate cone cylinder (2) is welded with the inner wall of the outer tube (1), and the inner tube (3) is located at the top of the steel plate cone cylinder (2).

3. The sinking pipe device for cement-soil mixing pile according to claim 1, characterized in that: The outer tube (1) and the inner tube (3) are placed with a grouting pipe (6), and the bending corner of the grouting pipe (6) is an arc-shaped pipe.

4. The sinking pipe device for cement-soil mixing pile according to claim 1, characterized in that: The limiting block (4) is a T-shaped block, the first support ring plate (5) is provided with a clamping groove in the inside, and the limiting block (4) is clamped with the first support ring plate (5) through the clamping groove.

5. The sinking pipe device for cement-soil mixing pile according to claim 1, characterized in that: The second support ring plate (8) is two in number and is located between the outer tube (1) and the inner tube (3) in an up-down mode.

6. The sinking pipe device for cement-soil mixing pile according to claim 5, characterized in that: The second support ring plate (8) is provided with a support groove in the inside of the bottom, the support block (7) is a trapezoidal block, and is located in the inside of the bottom second support ring plate (8) through the support groove.

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